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Yu HA, Baik C, Kim DW, Johnson ML, Hayashi H, Nishio M, Yang JCH, Su WC, Gold KA, Koczywas M, Smit EF, Steuer CE, Felip E, Murakami H, Kim SW, Su X, Sato S, Fan PD, Fujimura M, Tanaka Y, Patel P, Sternberg DW, Sellami D, Jänne PA. Translational insights and overall survival in the U31402-A-U102 study of patritumab deruxtecan (HER3-DXd) in EGFR-mutated NSCLC. Ann Oncol 2024; 35:437-447. [PMID: 38369013 DOI: 10.1016/j.annonc.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/26/2024] [Accepted: 02/08/2024] [Indexed: 02/20/2024] Open
Abstract
BACKGROUND Human epidermal growth factor receptor 3 (HER3) is broadly expressed in non-small-cell lung cancer (NSCLC) and is the target of patritumab deruxtecan (HER3-DXd), an antibody-drug conjugate consisting of a HER3 antibody attached to a topoisomerase I inhibitor payload via a tetrapeptide-based cleavable linker. U31402-A-U102 is an ongoing phase I study of HER3-DXd in patients with advanced NSCLC. Patients with epidermal growth factor receptor (EGFR)-mutated NSCLC that progressed after EGFR tyrosine kinase inhibitor (TKI) and platinum-based chemotherapy (PBC) who received HER3-DXd 5.6 mg/kg intravenously once every 3 weeks had a confirmed objective response rate (cORR) of 39%. We present median overall survival (OS) with extended follow-up in a larger population of patients with EGFR-mutated NSCLC and an exploratory analysis in those with acquired genomic alterations potentially associated with resistance to HER3-DXd. PATIENTS AND METHODS Safety was assessed in patients with EGFR-mutated NSCLC previously treated with EGFR TKI who received HER3-DXd 5.6 mg/kg; efficacy was assessed in those who also had prior PBC. RESULTS In the safety population (N = 102), median treatment duration was 5.5 (range 0.7-27.5) months. Grade ≥3 adverse events occurred in 76.5% of patients; the overall safety profile was consistent with previous reports. In 78/102 patients who had prior third-generation EGFR TKI and PBC, cORR by blinded independent central review (as per RECIST v1.1) was 41.0% [95% confidence interval (CI) 30.0% to 52.7%], median progression-free survival was 6.4 (95% CI 4.4-10.8) months, and median OS was 16.2 (95% CI 11.2-21.9) months. Patients had diverse mechanisms of EGFR TKI resistance at baseline. At tumor progression, acquired mutations in ERBB3 and TOP1 that might confer resistance to HER3-DXd were identified. CONCLUSIONS In patients with EGFR-mutated NSCLC after EGFR TKI and PBC, HER3-DXd treatment was associated with a clinically meaningful OS. The tumor biomarker characterization comprised the first description of potential mechanisms of resistance to HER3-DXd therapy.
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MESH Headings
- Humans
- Carcinoma, Non-Small-Cell Lung/drug therapy
- Carcinoma, Non-Small-Cell Lung/genetics
- Carcinoma, Non-Small-Cell Lung/mortality
- Carcinoma, Non-Small-Cell Lung/pathology
- Lung Neoplasms/drug therapy
- Lung Neoplasms/genetics
- Lung Neoplasms/mortality
- Lung Neoplasms/pathology
- ErbB Receptors/genetics
- ErbB Receptors/antagonists & inhibitors
- Female
- Receptor, ErbB-3/genetics
- Receptor, ErbB-3/antagonists & inhibitors
- Middle Aged
- Male
- Aged
- Mutation
- Adult
- Antibodies, Monoclonal, Humanized/administration & dosage
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antibodies, Monoclonal, Humanized/adverse effects
- Aged, 80 and over
- Camptothecin/analogs & derivatives
- Camptothecin/therapeutic use
- Camptothecin/administration & dosage
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/adverse effects
- Broadly Neutralizing Antibodies
- Immunoconjugates/therapeutic use
- Immunoconjugates/adverse effects
- Immunoconjugates/administration & dosage
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Affiliation(s)
- H A Yu
- Department of Medicine, Medical Oncology, Memorial Sloan Kettering Cancer Center, New York.
| | - C Baik
- University of Washington/Seattle Cancer Care Alliance, Seattle, USA
| | - D-W Kim
- Seoul National University College of Medicine and Seoul National University Hospital, Seoul, South Korea
| | - M L Johnson
- Sarah Cannon Research Institute at Tennessee Oncology, Nashville, USA
| | | | - M Nishio
- The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - J C-H Yang
- National Taiwan University Hospital, Taipei City
| | - W-C Su
- National Cheng Kung University Hospital, Tainan, Taiwan
| | - K A Gold
- Moores Cancer Center at UC San Diego Health, San Diego
| | | | - E F Smit
- Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - C E Steuer
- Winship Cancer Institute of Emory University, Atlanta, USA
| | - E Felip
- Vall d'Hebron University Hospital and Vall d'Hebron Institute of Oncology, Barcelona, Spain
| | | | - S-W Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - X Su
- Daiichi Sankyo, Inc., Basking Ridge, USA
| | - S Sato
- Daiichi Sankyo Co., Ltd., Tokyo, Japan
| | - P-D Fan
- Daiichi Sankyo, Inc., Basking Ridge, USA
| | | | - Y Tanaka
- Daiichi Sankyo, Inc., Basking Ridge, USA
| | - P Patel
- Daiichi Sankyo, Inc., Basking Ridge, USA
| | | | - D Sellami
- Daiichi Sankyo, Inc., Basking Ridge, USA
| | - P A Jänne
- Dana-Farber Cancer Institute, Boston, USA
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2
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Lobo RR, Siregar MU, da Silva SS, Monteiro AR, Salas-Solis G, Vicente ACS, Vinyard JR, Johnson ML, Ma S, Sarmikasoglou E, Coronella CJ, Hiibel SR, Faciola AP. Partial replacement of soybean meal with microalgae biomass on in vitro ruminal fermentation may reduce ruminal protein degradation. J Dairy Sci 2024; 107:1460-1471. [PMID: 37944802 DOI: 10.3168/jds.2023-24016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/20/2023] [Indexed: 11/12/2023]
Abstract
The objective of this study was to evaluate the effects of partially replacing soybean meal (SBM) with algal sources on in vitro ruminal fermentation. Using 6 fermenters in a 3 × 3 replicated Latin square with 3 periods of 10 d each, we tested 3 treatments: a control diet (CRT) with SBM at 17.8% of the diet dry matter (DM); and 50% SBM biomass replacement with either Chlorella pyrenoidosa (CHL); or Spirulina platensis (SPI). The basal diet was formulated to meet the requirements of a 680-kg Holstein dairy cow producing 45 kg/d of milk with 3.5% fat and 3% protein. All diets had a similar nutritional composition (16.0% CP; 34.9% NDF; 31.0% starch, DM basis) and fermenters were provided with 106 g DM/d split into 2 portions. After 7 d of adaptation, samples were collected for 3 d of each period for analyses of ruminal fermentation at 0, 1, 2, 4, 6, and 8 h after morning feeding for evaluation of the ruminal fermentation kinetics. For the evaluation of the daily production of total metabolites and for the evaluation of nutrient degradability, samples from the effluent containers were collected daily. Statistical analysis was performed with the MIXED procedure of SAS with treatment, time, and their interactions considered as fixed effects; day, square, and fermenter were considered as random effects. Orthogonal contrasts (CRT vs. algae; and CHL vs. SPI) were used to depict the treatment effect, and significance was declared when P ≤ 0.05. Fermenters that received algae-based diets had a greater propionate molar concentration and molar proportion when compared with the fermenters fed CRT diets. In addition, those algae-fed fermenters had lower branched short-chain fatty acids (BSCFA) and isoacids (IA), which are biomarkers of ruminal protein degradation, along with lower ammonia (NH3-N) concentration and greater nonammonia nitrogen (NAN). When contrasting with fermenters fed SPI-diets, fermenters fed based CHL-diets had a lower molar concentration of BSCFA and IA, along with lower NH3-N concentration and flow, and greater NAN, bacterial nitrogen flow, and efficiency of nitrogen utilization. Those results indicate that CHL protein may be more resistant to ruminal degradation, which would increase efficiency of nitrogen utilization. In summary, partially replacing SBM with algae biomass, especially with CHL, is a promising strategy to improve the efficiency of nitrogen utilization, due to the fact that fermenters fed CHL-based diets resulted in a reduction in BSCFA and IA, which are markers of protein degradation, and it would improve the efficiency of nitrogen utilization. However, further validation using in vivo models are required.
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Affiliation(s)
- R R Lobo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - M U Siregar
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - S S da Silva
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - A R Monteiro
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608; Animal Nutrition Laboratory, Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil, 13400-970
| | - G Salas-Solis
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - A C S Vicente
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - J R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - M L Johnson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - S Ma
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - E Sarmikasoglou
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608
| | - C J Coronella
- Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557
| | - S R Hiibel
- Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557
| | - A P Faciola
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608.
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3
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Niroobakhsh M, Laughrey LE, Dallas SL, Johnson ML, Ganesh T. Computational modeling based on confocal imaging predicts changes in osteocyte and dendrite shear stress due to canalicular loss with aging. Biomech Model Mechanobiol 2024; 23:129-143. [PMID: 37642807 DOI: 10.1007/s10237-023-01763-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 08/09/2023] [Indexed: 08/31/2023]
Abstract
Exercise and physical activity exert mechanical loading on the bones which induces bone formation. However, the relationship between the osteocyte lacunar-canalicular morphology and mechanical stress experienced locally by osteocytes transducing signals for bone formation is not fully understood. In this study, we used computational modeling to predict the effect of canalicular density, the number of fluid inlets, and load direction on fluid flow shear stress (FFSS) and bone strains and how these might change following the microstructural deterioration of the lacunar-canalicular network that occurs with aging. Four distinct computational models were initially generated of osteocytes with either ten or eighteen dendrites using a fluid-structure interaction method with idealized geometries. Next, a young and a simulated aged osteocyte were developed from confocal images after FITC staining of the femur of a 4-month-old C57BL/6 mouse to estimate FFSS using a computational fluid dynamics approach. The models predicted higher fluid velocities in the canaliculi versus the lacunae. Comparison of idealized models with five versus one fluid inlet indicated that with four more inlets, one-half of the dendrites experienced FFSS greater than 0.8 Pa, which has been associated with osteogenic responses. Confocal image-based models of real osteocytes indicated a six times higher ratio of canalicular to lacunar surface area in the young osteocyte model than the simulated aged model and the average FFSS in the young model (FFSS = 0.46 Pa) was three times greater than the aged model (FFSS = 0.15 Pa). Interestingly, the surface area with FFSS values above 0.8 Pa was 23 times greater in the young versus the simulated aged model. These findings may explain the impaired mechano-responsiveness of osteocytes with aging.
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Affiliation(s)
- Mohammad Niroobakhsh
- Division of Natural and Built Environment, School of Science and Engineering, University of Missouri-Kansas City, 350 L Flarsheim Hall, 5100 Rockhill Road, Kansas City, MO, 64110, USA
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, 620 E 25th Street, Kansas City, MO, 64108, USA
| | - Loretta E Laughrey
- Division of Natural and Built Environment, School of Science and Engineering, University of Missouri-Kansas City, 350 L Flarsheim Hall, 5100 Rockhill Road, Kansas City, MO, 64110, USA
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, 620 E 25th Street, Kansas City, MO, 64108, USA
| | - Sarah L Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, 620 E 25th Street, Kansas City, MO, 64108, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, 620 E 25th Street, Kansas City, MO, 64108, USA
| | - Thiagarajan Ganesh
- Division of Natural and Built Environment, School of Science and Engineering, University of Missouri-Kansas City, 350 L Flarsheim Hall, 5100 Rockhill Road, Kansas City, MO, 64110, USA.
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4
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Borghaei H, de Marinis F, Dumoulin D, Reynolds C, Theelen WSME, Percent I, Gutierrez Calderon V, Johnson ML, Madroszyk-Flandin A, Garon EB, He K, Planchard D, Reck M, Popat S, Herbst RS, Leal TA, Shazer RL, Yan X, Harrigan R, Peters S. SAPPHIRE: phase III study of sitravatinib plus nivolumab versus docetaxel in advanced nonsquamous non-small-cell lung cancer. Ann Oncol 2024; 35:66-76. [PMID: 37866811 DOI: 10.1016/j.annonc.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/24/2023] Open
Abstract
BACKGROUND Checkpoint inhibitor (CPI) therapy revolutionized treatment for advanced non-small-cell lung cancer (NSCLC); however, most patients progress due to primary or acquired resistance. Sitravatinib is a receptor tyrosine kinase inhibitor that can shift the immunosuppressive tumor microenvironment toward an immunostimulatory state. Combining sitravatinib with nivolumab (sitra + nivo) may potentially overcome initial CPI resistance. PATIENTS AND METHODS In the phase III SAPPHIRE study, patients with advanced non-oncogenic driven, nonsquamous NSCLC who initially benefited from (≥4 months on CPI without progression) and subsequently experienced disease progression on or after CPI combined with or following platinum-based chemotherapy were randomized 1 : 1 to sitra (100 mg once daily administered orally) + nivo (240 mg every 2 weeks or 480 mg every 4 weeks administered intravenously) or docetaxel (75 mg/m2 every 3 weeks administered intravenously). The primary endpoint was overall survival (OS). The secondary endpoints included progression-free survival (PFS), objective response rate (ORR), clinical benefit rate (CBR), duration of response (DOR; all assessed by blinded independent central review), and safety. RESULTS A total of 577 patients included randomized: sitra + nivo, n = 284; docetaxel, n = 293 (median follow-up, 17.1 months). Sitra + nivo did not significantly improve OS versus docetaxel [median, 12.2 versus 10.6 months; hazard ratio (HR) 0.86, 95% confidence interval (CI) 0.70-1.05; P = 0.144]. The median PFS was 4.4 versus 5.4 months, respectively (HR 1.08, 95% CI 0.89-1.32; P = 0.452). The ORR was 15.6% for sitra + nivo and 17.2% for docetaxel (P = 0.597); CBR was 75.5% and 64.5%, respectively (P = 0.004); median DOR was 7.4 versus 7.1 months, respectively (P = 0.924). Grade ≥3 treatment-related adverse events were observed in 53.0% versus 66.7% of patients receiving sitra + nivo versus docetaxel, respectively. CONCLUSIONS Although median OS was numerically longer with sitra + nivo, the primary endpoint was not met in patients with previously treated advanced nonsquamous NSCLC. The safety profiles demonstrated were consistent with previous reports.
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Affiliation(s)
- H Borghaei
- Hematology and Oncology Department, Fox Chase Cancer Center, Philadelphia, USA.
| | - F de Marinis
- Division of Thoracic Oncology, European Institute of Oncology, IRCCS, Milan, Italy
| | - D Dumoulin
- Department of Pulmonary Medicine, Erasmus Medisch Centrum, Rotterdam, the Netherlands
| | - C Reynolds
- Ocala Cancer Center, Florida Cancer Specialists and Research Institute - North Region (SCRI), Ocala, USA
| | - W S M E Theelen
- Department of Thoracic Oncology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - I Percent
- North Port Cancer Center, Florida Cancer Specialists and Research Institute - South Region (SCRI), Port Charlotte, USA
| | - V Gutierrez Calderon
- Department of Medical Oncology, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - M L Johnson
- Department of Medical Oncology, Sarah Cannon Research Institute, Tennessee Oncology, Nashville, USA
| | | | - E B Garon
- Division of Hematology-Oncology, David Geffen School of Medicine, University of California, Los Angeles
| | - K He
- Comprehensive Cancer Center, Pelotonia Institute for Immuno-Oncology, The Ohio State University, Columbus, USA
| | - D Planchard
- Department of Medical Oncology, Institut Gustave Roussy, Villejuif, France
| | - M Reck
- Department of Thoracic Oncology, LungenClinic, Airway Research Center North, German Center for Lung Research, Grosshansdorf, Germany
| | - S Popat
- Lung Unit, Department of Medicine, The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London, UK
| | - R S Herbst
- Section of Medical Oncology, Yale University, New Haven
| | - T A Leal
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University, Atlanta
| | - R L Shazer
- Department of Clinical Research and Development, Mirati Therapeutics, Inc., San Diego, USA
| | - X Yan
- Department of Clinical Research and Development, Mirati Therapeutics, Inc., San Diego, USA
| | - R Harrigan
- Department of Clinical Research and Development, Mirati Therapeutics, Inc., San Diego, USA
| | - S Peters
- Department of Oncology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
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5
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Betz ME, Meza K, Friedman K, Moceri-Brooks J, Johnson ML, Simonetti J, Baker JC, Bryan CJ, Anestis MD. 'Whether it's your weapon or not, it's your home': US military spouse perspectives on personal firearm storage. BMJ Mil Health 2023:e002591. [PMID: 38135459 DOI: 10.1136/military-2023-002591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
INTRODUCTION In the USA, an estimated 45% of veterans personally own firearms. Firearm access increases the risk of suicide, so suicide prevention efforts in the US Department of Defense (DoD) focus on lethal means safety, including reducing firearm access. Spouse input may enhance effective messaging and intervention delivery of lethal means safety. This study used qualitative methods to explore the perspectives of military spouses or partners on personal firearm storage, including at-home decisions, on-base storage and existing messaging from the DoD. MATERIALS AND METHODS Qualitative data were obtained using 1:1 interviews and focus groups with spouses/partners of US military service members (active duty, Reserve, National Guard, recently separated from the military) and representatives from military support organisations. Sessions focused on personal firearm storage (at home or on military installations) and military messaging around secure firearm storage and firearm suicide prevention. Data were analysed using a team-based, mixed deductive-inductive approach. RESULTS Across 56 participants (August 2022-March 2023), the themes were variability in current home firearm storage and spousal participation in decision-making; uncertainty about firearm storage protocols on military installations; mixed awareness of secure firearm storage messaging from the military; and uncertainty about procedures or protocols for removing firearm access for an at-risk person. CONCLUSION US military spouses are important messengers for firearm safety and suicide prevention, but they are currently underutilised. Tailored prevention campaigns should consider spousal dynamics and incorporate education about installation procedures.
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Affiliation(s)
- Marian E Betz
- Department Emergency Medicine, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
- Geriatric Research Education and Clinical Center, VA Eastern Colorado Health Care System, Aurora, Colorado, USA
- Firearm Injury Prevention Initiative, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
| | - K Meza
- Department Emergency Medicine, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
- Firearm Injury Prevention Initiative, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
| | - K Friedman
- Department Emergency Medicine, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
- Firearm Injury Prevention Initiative, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
| | - J Moceri-Brooks
- New Jersey Gun Violence Research Center, Rutgers School of Public Health, Piscataway, New Jersey, USA
| | - M L Johnson
- Department Emergency Medicine, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
- Firearm Injury Prevention Initiative, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
| | - J Simonetti
- Firearm Injury Prevention Initiative, University of Colorado Anschutz Medical Campus School of Medicine, Aurora, Colorado, USA
- Rocky Mountain Mental Illness Research, Education, and Clinical Center for Suicide Prevention, Veterans Health Administration, Aurora, Colorado, USA
| | - J C Baker
- Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - C J Bryan
- Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Center of Excellence for Suicide Prevention, VA Finger Lakes Health Care System, Canandaigua, New York, USA
| | - M D Anestis
- New Jersey Gun Violence Research Center, Rutgers School of Public Health, Piscataway, New Jersey, USA
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Sarmikasoglou E, Johnson ML, Vinyard JR, Sumadong P, Lobo RR, Arce-Cordero JA, Bahman A, Ravelo A, Halima S, Salas-Solis GK, Hikita C, Watanabe T, Faciola AP. Effects of cashew nutshell extract and monensin on microbial fermentation in a dual-flow continuous culture. J Dairy Sci 2023; 106:8746-8757. [PMID: 37678783 DOI: 10.3168/jds.2023-23597] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/05/2023] [Indexed: 09/09/2023]
Abstract
The objective of this study was to compare cashew nutshell extract (CNSE) to monensin and evaluate changes in in vitro mixed ruminal microorganism fermentation, nutrient digestibility, and microbial nitrogen outflow. Treatments were randomly assigned to 8 fermenters in a replicated 4 × 4 Latin square design with 4 experimental periods of 10 d (7 d for diet adaptation and 3 d for sample collection). Basal diets contained 43.5:56.5 forage: concentrate ratio and each fermenter was fed 106 g of DM/d divided equally between 2 feeding times. Treatments were control (CON, basal diet without additives), 2.5 μM monensin (MON), 0.1 mg CNSE granule/g DM (CNSE100), and 0.2 mg CNSE granule/g DM (CNSE200). On d 8 to10, samples were collected for pH, lactate, NH3-N, volatile fatty acids (VFA), mixed protozoa counts, organic matter (OM), and neutral detergent fiber (NDF) digestibility. Data were analyzed with the GLIMMIX procedure of SAS. Orthogonal contrasts were used to test the effects of (1) ADD (CON vs. MON, CNSE100, and CNSE200); (2) MCN (MON vs. CNSE100 and CNSE200); and (3) DOSE (CNSE100 vs. CNSE200). We observed that butyrate concentration in all treatments was lower compared with CON and the concentration for MON was lower compared with CNSE treatments. Protozoal population in all treatments was lower compared with CON. No effects were observed for pH, lactate, NH3-N, total VFA, OM, or N utilization. Within the 24-h pool, protozoal generation time, tended to be lower, while NDF digestibility tended to be greater in response to all additives. Furthermore, the microbial N flow, and the efficiency of N use tended to be lower for the monensin treatment compared with CNSE treatments. Overall, our results showed that both monensin and CNSE decreased butyrate synthesis and protozoal populations, while not affecting OM digestibility and tended to increase NDF digestibility; however, such effects are greater with monensin than CNSE nutshell.
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Affiliation(s)
- E Sarmikasoglou
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - M L Johnson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - J R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - P Sumadong
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611; Department of Animal Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - R R Lobo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - J A Arce-Cordero
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611; Escuela de Zootecnia, Universidad de Costa Rica, San Jose, 11501-2060, Costa Rica
| | - A Bahman
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - A Ravelo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - S Halima
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - G K Salas-Solis
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611
| | - C Hikita
- SDS Biotech K.K., Tokyo, Japan 101-0022
| | | | - A P Faciola
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611.
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7
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Steer KE, Johnson ML, Edmonds CE, Adjerid K, Bond LE, German RZ, Mayerl CJ. The Impact of Varying Nipple Properties on Infant Feeding Physiology and Performance Throughout Ontogeny in a Validated Animal Model. Dysphagia 2023:10.1007/s00455-023-10630-w. [PMID: 37947879 DOI: 10.1007/s00455-023-10630-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 10/11/2023] [Indexed: 11/12/2023]
Abstract
Infant feeding requires successful interactions between infant physiology and the maternal (or bottle) nipple. Within artificial nipples, there is variation in both nipple stiffness and flow rates, as well as variation in infant physiology as they grow and mature. However, we have little understanding into how infants interact with variable nipple properties to generate suction and successfully feed. We designed nipples with two different stiffnesses and hole sizes and measured infant feeding performance through ontogeny using a pig model. We evaluated their response to nipple properties using high-speed X-Ray videofluoroscopy. Nipple properties substantially impacted sucking physiology and performance. Hole size had the most profound impact on the number of sucks infants took per swallow. Pressure generation generally increased with age, especially in nipples where milk acquisition was more difficult. However, most strikingly, in nipples with lower flow rates the relationship between suction generation and milk acquisition was disrupted. In order to design effective interventions for infants with feeding difficulties, we must consider how variation in nipple properties impacts infant physiology in a targeted manner. While reducing flow rate may reduce the frequency an infant aspirates, it may impair systems involved in sensorimotor integration.
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Affiliation(s)
- K E Steer
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
- Department of Biological Sciences, Northern Arizona University, Flagstaff, USA
| | - M L Johnson
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
| | - C E Edmonds
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
- School of Biomedical Sciences, Kent State University, Kent, USA
| | - K Adjerid
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
- Department of Biomedical Engineering, Tulane University, New Orleans, USA
| | - L E Bond
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
| | - R Z German
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA
| | - C J Mayerl
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, 4209 St Route 44, Rootstown, OH, 44272, USA.
- Department of Biological Sciences, Northern Arizona University, Flagstaff, USA.
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8
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Johnson ML, Steer KE, Edmonds CE, Adjerid K, German RZ, Mayerl CJ. Nipple properties affect sensorimotor integration during bottle feeding in an infant pig model. J Exp Zool A Ecol Integr Physiol 2023; 339:767-776. [PMID: 37438924 PMCID: PMC10528713 DOI: 10.1002/jez.2727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/13/2023] [Accepted: 06/16/2023] [Indexed: 07/14/2023]
Abstract
Infant feeding is a critical neurological milestone in development defined by the coordination of muscles, peripheral nerves, and brainstem nuclei. In infants, milk flow rate is often limited to improve feeding performance without treating the underlying deficiencies in the sucking and swallowing processes. Modification of the neuromotor response via sensory information from the nipple during bottle feeding is an unexplored avenue for physiology-based interventions. In this study, we assessed how differences in nipple hole size and nipple stiffness affect sucking muscle activation and subsequent movement. We fabricated four bottle nipples of varying hole size and stiffness to determine how variation in nipple properties affects the sucking behavior of infant pigs. Our results demonstrate that sensory information from the nipple affects sucking motor output. Nipple hole sizes and stiffnesses with a larger milk flow rate resulted in greater muscle activity and kinematic movement. Additionally, our results suggest that sensorimotor interventions are better directed toward modulating tongue function rather than the mandible movements due to a greater response to sensory information. Understanding how sensory information influences infant feeding is instrumental in promoting effective infant feeding.
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Affiliation(s)
- ML Johnson
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH
| | - KE Steer
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ
| | - CE Edmonds
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH
| | - K Adjerid
- Department of Biomedical Engineering, Tulane University, New Orleans, LA
| | - RZ German
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH
| | - CJ Mayerl
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ
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9
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Steer KE, Johnson ML, Adjerid K, Bond LE, Howe SP, Khalif A, Nkachukwu KC, Edmonds CE, German RZ, Mayerl CJ. The Function of the Mammal Extrinsic Tongue Musculature in the Transition from Suckling to Drinking. Integr Comp Biol 2023; 63:641-652. [PMID: 37160353 PMCID: PMC10503468 DOI: 10.1093/icb/icad023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/25/2023] [Accepted: 05/02/2023] [Indexed: 05/11/2023] Open
Abstract
The transition from suckling to drinking is a developmental pathway that all mammals take. In both behaviors, the tongue is the primary structure involved in acquiring, transporting, and swallowing the liquid. However, the two processes are fundamentally different: during suckling, the tongue must function as a pump to generate suction to move milk, whereas during drinking, the tongue moves backwards and forwards through the mouth to acquire and move water. Despite these fundamental differences, we have little understanding of how tongues role varies between these behaviors. We used an infant pig model to investigate the relationships between anatomy, physiology, and function of the tongue to examine how lingual function is modulated in the transition from infancy to adulthood. We found that while some muscles were proportionally largest at birth, others were proportionally larger at the time of weaning. Furthermore, we found variation in tongue movements between suckling and drinking along both the mediolateral and anteroposterior axes, resulting in differences in tongue deformation between the two behaviors. The extrinsic tongue muscles also changed in function differently between drinking and suckling. Genioglossus increased its activity and turned on and off earlier in the cycle during drinking, whereas hyoglossus fired at lower amplitudes during drinking, and turned on and off later in the cycle. Together, the data highlight the significant need for high neuroplasticity in the control of the tongue at a young age in mammals and suggest that the ability to do so is key in the ontogeny and evolution of feeding in these animals.
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Affiliation(s)
- K E Steer
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - M L Johnson
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - K Adjerid
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
- Department of Biomedical Engineering, Tulane University, New Orleans, Lousiana, 70118, USA
| | - L E Bond
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - S P Howe
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - A Khalif
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - K C Nkachukwu
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - C E Edmonds
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
- School of Biomedical Sciences, Kent State University, Kent, OH 44242, USA
| | - R Z German
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown OH 44272, USA
| | - C J Mayerl
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
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10
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Lara-Castillo N, Masunaga J, Brotto L, Vallejo JA, Javid K, Wacker MJ, Brotto M, Bonewald LF, Johnson ML. Muscle secreted factors enhance activation of the PI3K/Akt and β-catenin pathways in murine osteocytes. Bone 2023; 174:116833. [PMID: 37385426 PMCID: PMC10926931 DOI: 10.1016/j.bone.2023.116833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/19/2023] [Accepted: 06/25/2023] [Indexed: 07/01/2023]
Abstract
Skeletal muscle and bone interact at the level of mechanical loading through the application of force by muscles to the skeleton and more recently focus has been placed on molecular/biochemical coupling of these two tissues. We sought to determine if muscle and muscle-derived factors were essential to the osteocyte response to loading. Botox® induced muscle paralysis was used to investigate the role of muscle contraction during in vivo tibia compression loading. 5-6 month-old female TOPGAL mice had their right hindlimb muscles surrounding the tibia injected with either BOTOX® or saline. At four days post injections when muscle paralysis peaked, the right tibia was subjected to a single session of in vivo compression loading at ∼2600 με. At 24 h post-load we observed a 2.5-fold increase in β-catenin signaling in osteocytes in the tibias of the saline injected mice, whereas loading of tibias from Botox® injected mice failed to active β-catenin signaling in osteocytes. This suggests that active muscle contraction produces a factor(s) that is necessary for or conditions the osteocyte's ability to respond to load. To further investigate the role of muscle derived factors, MLO-Y4 osteocyte-like cells and a luciferase based β-catenin reporter (TOPflash-MLO-Y4) cell line we developed were treated with conditioned media (CM) from C2C12 myoblasts (MB) and myotubes (MT) and ex vivo contracted Extensor Digitorum Longus (EDL) and Soleus (Sol) muscles under static or loading conditions using fluid flow shear stress (FFSS). 10 % C2C12 myotube CM, but not myoblast or NIH3T3 fibroblast cells CM, induced a rapid activation of the Akt signaling pathway, peaking at 15 min and returning to baseline by 1-2 h under static conditions. FFSS applied to MLO-Y4 cells for 2 h in the presence of 10 % MT-CM resulted in a 6-8 fold increase in pAkt compared to a 3-4 fold increase under control or when exposed to 10 % MB-CM. A similar response was observed in the presence of 10 % EDL-CM, but not in the presence of 10 % Sol-CM. TOPflash-MLO-Y4 cells were treated with 10 ng/ml Wnt3a in the presence or absence of MT-CM. While MT-CM resulted in a 2-fold activation and Wnt3a produced a 10-fold activation, the combination of MT-CM + Wnt3a resulted in a 25-fold activation of β-catenin signaling, implying a synergistic effect of factors in MT-CM with Wnt3a. These data provide clear evidence that specific muscles and myotubes produce factors that alter important signaling pathways involved in the response of osteocytes to mechanical load. These data strongly suggest that beyond mechanical loading there is a molecular coupling of muscle and bone.
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Affiliation(s)
- N Lara-Castillo
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America.
| | - J Masunaga
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America
| | - L Brotto
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, 411 S. Nedderman Dr, Arlington, TX 76019, United States of America
| | - J A Vallejo
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America; Department of Biomedical Sciences, UMKC School of Medicine, 2411 Holmes, Kansas City, MO 64108, United States of America
| | - K Javid
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America
| | - M J Wacker
- Department of Biomedical Sciences, UMKC School of Medicine, 2411 Holmes, Kansas City, MO 64108, United States of America
| | - M Brotto
- Department of Biomedical Sciences, UMKC School of Medicine, 2411 Holmes, Kansas City, MO 64108, United States of America
| | - L F Bonewald
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America; Indiana Center for Musculoskeletal Health, Barnhill Drive, Indianapolis, IN 46202, United States of America
| | - M L Johnson
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, United States of America
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11
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Cho BC, Penkov K, Bondarenko I, Kurochkin A, Pikiel J, Ahn HK, Korożan ME, Osipov M, Odintsova S, Braiteh F, Ribas A, Grilley-Olson JE, Lugowska I, Bonato V, Damore MA, Yang W, Jacobs IA, Bowers M, Li M, Johnson ML. A phase Ib/II dose expansion study of subcutaneous sasanlimab in patients with locally advanced or metastatic non-small-cell lung cancer and urothelial carcinoma. ESMO Open 2023; 8:101589. [PMID: 37385154 PMCID: PMC10485400 DOI: 10.1016/j.esmoop.2023.101589] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/15/2023] [Accepted: 05/23/2023] [Indexed: 07/01/2023] Open
Abstract
BACKGROUND Sasanlimab is an antibody to the programmed cell death protein 1 receptor. We report updated data of subcutaneous sasanlimab in non-small-cell lung cancer (NSCLC) and urothelial carcinoma dose expansion cohorts from a first-in-human phase Ib/II study. PATIENTS AND METHODS Patients were ≥18 years of age with NSCLC or urothelial carcinoma, and no prior immunotherapies, who progressed on or were intolerant to systemic therapy, or for whom systemic therapy was refused or unavailable. Patients received subcutaneous sasanlimab at 300 mg every 4 weeks (q4w). Primary objectives were to evaluate safety, tolerability, and clinical efficacy by objective response rate (ORR). RESULTS Sixty-eight and 38 patients with NSCLC and urothelial carcinoma, respectively, received subcutaneous sasanlimab. Overall, sasanlimab was well tolerated; 13.2% of patients experienced grade ≥3 treatment-related adverse events. Confirmed ORR was 16.4% and 18.4% in the NSCLC and urothelial carcinoma cohorts, respectively. ORR was generally higher in patients with high programmed death-ligand 1 (PD-L1) expression (≥25%) and high tumor mutational burden (TMB; >75%). In the NSCLC and urothelial carcinoma cohorts, median progression-free survival (PFS) was 3.7 and 2.9 months, respectively; corresponding median overall survival (OS) was 14.7 and 10.9 months. Overall, longer median PFS and OS correlated with high PD-L1 expression and high TMB. Longer median PFS and OS were also associated with T-cell inflamed gene signature in the urothelial carcinoma cohort. CONCLUSIONS Subcutaneous sasanlimab at 300 mg q4w was well tolerated with promising clinical efficacy observed. Phase II and III clinical trials of sasanlimab are ongoing to validate clinical benefit. Subcutaneous sasanlimab may be a potential treatment option for patients with NSCLC or urothelial carcinoma.
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Affiliation(s)
- B C Cho
- Division of Medical Oncology, Yonsei Cancer Center, Seoul, Republic of Korea.
| | - K Penkov
- Private Healthcare Institution Clinical Hospital "RZhD-Medicine", St Petersburg, Russian Federation
| | - I Bondarenko
- Department of Oncology and Medical Oncology, Dnipropetrovsk City Multiple-Discipline Clinical Hospital, Dnipro, Ukraine
| | - A Kurochkin
- Municipal Non-profit Enterprise of Sumy Regional Council, Sumy Regional Clinical Oncology Dispensary, Sumy, Ukraine
| | - J Pikiel
- Poradnia Onkologiczna, Szpitale Pomorskie Sp. z o.o, Gdynia, Poland
| | - H K Ahn
- Division of Medical Oncology, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - M E Korożan
- Oddzial Onkologii Klinicznej, Szpital Grudziądz, Grudziądz, Poland
| | - M Osipov
- Sbhi "Lrcod", Vsevolozhsky District, Leningrad Region, Russian Federation
| | - S Odintsova
- Current Medical Technology, St Petersburg, Russian Federation
| | - F Braiteh
- Comprehensive Cancer Centers of Nevada, Las Vegas, USA
| | - A Ribas
- Jonsson Comprehensive Cancer Center, The University of California Los Angeles, Los Angeles, USA
| | | | - I Lugowska
- Early Phase Clinical Trials Unit, Maria Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | | | | | - W Yang
- Pfizer Inc, San Diego, USA
| | | | | | - M Li
- Pfizer Inc, San Francisco, USA
| | - M L Johnson
- Sarah Cannon Research Institute, Tennessee Oncology PLLC, Nashville, USA.
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12
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Vinyard JR, Ravelo A, Sarmikasoglou E, Monteiro HF, Arce-Cordero JA, Johnson ML, Agustinho BC, Lobo RR, Yungmann MG, Winter AHR, Gilbertsen LM, Mills MN, Soltis M, Ghizzi LG, Gusmão JO, Ferraretto LF, Faciola AP. Effects of exogenous amylolytic or fibrolytic enzymes inclusion on in vitro fermentation of lactating dairy cow diets in a dual-flow continuous-culture system. J Dairy Sci 2023; 106:1002-1012. [PMID: 36543642 DOI: 10.3168/jds.2022-22469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/27/2022] [Indexed: 12/24/2022]
Abstract
The objective of this study was to determine the effects of including exogenous amylolytic or fibrolytic enzymes in a diet for high-producing dairy cows on in vitro ruminal fermentation. Eight dual-flow continuous-culture fermentors were used in a replicated 4 × 4 Latin square. The treatments were control (CON), a xylanase and glucanase mixture (T1), an α-amylase mixture (T2), or a xylanase, glucanase, and α-amylase mixture (T3). Treatments were included at a rate of 0.008% of diet dry matter (DM) for T1 and T2 and at 0.02% for T3. All treatments replaced the equivalent amount of soybean meal in the diet compared with CON. All diets were balanced to have the same nutrient composition [30.2% neutral detergent fiber (NDF), 16.1% crude protein (CP), and 30% starch; DM basis], and fermentors were fed 106 g/d divided into 2 feedings. At each feeding, T2 was pipetted into the respective fermentor and an equivalent amount of deionized water was added to each fermentor to eliminate potential variation. Experimental periods were 10 d (7 d for adaptation and 3 d for sample collection). Composite samples of daily effluent were collected and analyzed for volatile fatty acids (VFA), NH3-N, and lactate concentrations, degradability of DM, organic matter, NDF, CP, and starch, and flow and metabolism of N. Samples of fermentor contents were collected from each fermentor at 0, 1, 2, 4, 6, and 8 h after feeding to determine kinetics of pH, NH3-N, lactate, and VFA concentrations over time. All data were analyzed using PROC GLIMMIX of SAS (SAS Institute Inc.), and the repeated variable of time was included for kinetics measurements. Treatment did not affect mean pH, degradability, N flow and metabolism, or the concentrations of VFA, NH3-N, or lactate in the effluent samples. Treatment did not affect pH, acetate:propionate ratio, or the concentrations of lactate, NH3-N, total VFA, acetate, propionate, butyrate, isobutyrate, valerate, or caproate. However, the concentration of total VFA tended to change at each time point depending upon the treatment, and T2 tended to have a greater proportion of 2-methylbutyrate and isovalerate than CON, T1, or T3. As 2-methylbutyrate and isovalerate are branched-chain VFA that are synthesized from branched-chain amino acids, T2 may have an increased fermentation of branched-chain amino acids or decreased uptake by fibrolytic microorganisms. Although we did not observe changes in N metabolism due to the enzymes, there could be changes in microbial populations that utilize branched-chain VFA. Overall, the tested enzymes did not improve in vitro ruminal fermentation in the diet of high-producing dairy cows.
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Affiliation(s)
- J R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - A Ravelo
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - E Sarmikasoglou
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - H F Monteiro
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis 95616
| | - J A Arce-Cordero
- Department of Animal Sciences, University of Florida, Gainesville 32608; Escuela de Zootecnia, Universidad de Costa Rica, San Jose, 11501-2060, Costa Rica
| | - M L Johnson
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - B C Agustinho
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal, Veterinary, and Food Sciences, University of Idaho, Moscow 83844
| | - R R Lobo
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - M G Yungmann
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - A H R Winter
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - L M Gilbertsen
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - M N Mills
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - M Soltis
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal Science, University of Tennessee, Knoxville 37996
| | - L G Ghizzi
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, 13635-900, Brazil
| | - J O Gusmão
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal Science, Federal University of Lavras, Lavras, 37200-900, Brazil
| | - L F Ferraretto
- Department of Animal and Dairy Science, University of Wisconsin-Madison, Madison 53706
| | - A P Faciola
- Department of Animal Sciences, University of Florida, Gainesville 32608.
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13
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Lobo RR, Arce-Cordero JA, So S, Soltis M, Nehme Marinho M, Agustinho BC, Ravelo AD, Vinyard JR, Johnson ML, Monteiro HF, Sarmikasoglou E, Faciola AP. Production, physiological response, and calcium and magnesium balance of lactating Holstein cows fed different sources of supplemental magnesium with or without ruminal buffer. J Dairy Sci 2023; 106:990-1001. [PMID: 36526456 DOI: 10.3168/jds.2022-22583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/19/2022] [Indexed: 12/15/2022]
Abstract
The objective of this study was to evaluate the effects of dietary replacement of magnesium oxide (MgO) with calcium-magnesium hydroxide [CaMg(OH)2] and its interaction with ruminal buffer (sodium sesquicarbonate) supplementation on production, Ca and Mg balance, and overall physiological response of mid-lactation Holstein dairy cows. Sixty cows averaging 40.5 ± 7.0 kg of milk/d were used. Treatments were assigned following a 2 × 2 factorial arrangement: (1) MgO, (2) MgO + buffer, (3) CaMg(OH)2, or (4) CaMg(OH)2 + buffer. Diets were formulated to have 16.5% of crude protein, 1.82 Mcal/kg of net energy for lactation, 0.67% Ca, 0.39% P, and 0.25% Mg, all on a dry matter (DM) basis. Treatments were individually top dressed. Milk production, composition, and DM intake were evaluated. A subsample of 20 cows were randomly selected for the evaluation of Ca and Mg balance, blood gases, and electrolytes. Ruminal fluid was also collected for evaluation of pH and Ca and Mg solubility. Effects of Mg source, buffer, and the interaction Mg source × buffer were analyzed through orthogonal contrasts. An interaction of Mg source × buffer was found for DM intake and feed efficiency, in which cows fed CaMg(OH)2 had a similar feed efficiency regardless of ruminal buffer inclusion; however, when cows were fed MgO, the inclusion of buffer reduced feed efficiency. No effects on body weight and milk yield were observed. Buffer addition tended to increase the concentrations of fat, protein, and solids-not-fat, without affecting the yields of these milk components. Magnesium source and buffer did not affect ruminal fluid, blood, urine, or fecal pH; however, buffer supplementation increased urinary pH. Treatment with CaMg(OH)2 increased blood concentration of HCO3-, total CO2, and base excess compared with cows fed MgO. No differences were observed in the ruminal solubility of Ca and Mg or on milk or urinary Ca and Mg excretion. Greater plasma Mg concentration was observed for animals fed MgO compared with cows fed CaMg(OH)2; however, both sources were above the threshold recommended in the literature for dairy cows. Also, a reduction in fecal Mg excretion was observed in animals fed CaMg(OH)2. In summary, we provide evidence that CaMg(OH)2 could replace MgO without affecting performance, overall physiological response, or Ca and Mg balance of mid-lactating dairy Holstein cows.
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Affiliation(s)
- R R Lobo
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - J A Arce-Cordero
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - S So
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal Science, Khon Kaen University, Khon Kaen 40002, Thailand; Department of Animal Science, Faculty of Agriculture and Food Processing, National University of Battambang, Battambang 02352, Cambodia
| | - M Soltis
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal Science, University of Tennessee, Knoxville 37998
| | - M Nehme Marinho
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - B C Agustinho
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Animal, Veterinary and Food Sciences, University of Idaho, Moscow 83844
| | - A D Ravelo
- Department of Animal Sciences, University of Florida, Gainesville 32608; College of Veterinary Medicine, University of Minnesota, St. Paul 55108
| | - J R Vinyard
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - M L Johnson
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - H F Monteiro
- Department of Animal Sciences, University of Florida, Gainesville 32608; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis 95616
| | - E Sarmikasoglou
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - A P Faciola
- Department of Animal Sciences, University of Florida, Gainesville 32608.
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14
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Kitase Y, Vallejo JA, Dallas SL, Xie Y, Dallas M, Tiede-Lewis L, Moore D, Meljanac A, Kumar C, Zhao C, Rosser J, Brotto M, Johnson ML, Liu Z, Wacker MJ, Bonewald L. Body weight influences musculoskeletal adaptation to long-term voluntary wheel running during aging in female mice. Aging (Albany NY) 2022; 15:308-352. [PMID: 36403149 PMCID: PMC9925690 DOI: 10.18632/aging.204390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/02/2022] [Indexed: 11/19/2022]
Abstract
Frailty is the hallmark of aging that can be delayed with exercise. The present studies were initiated based on the hypothesis that long-term voluntary wheel running (VWR) in female mice from 12 to 18 or 22 months of age would have beneficial effects on the musculoskeletal system. Mice were separated into high (HBW) and low (LBW) body weight based on final body weights upon termination of experiments. Bone marrow fat was significantly higher in HBW than LBW under sedentary conditions, but not with VWR. HBW was more protective for soleus size and function than LBW under sedentary conditions, however VWR increased soleus size and function regardless of body weight. VWR plus HBW was more protective against muscle loss with aging. Similar effects of VWR plus HBW were observed with the extensor digitorum longus, EDL, however, LBW with VWR was beneficial in improving EDL fatigue resistance in 18 mo mice and was more beneficial with regards to muscle production of bone protective factors. VWR plus HBW maintained bone in aged animals. In summary, HBW had a more beneficial effect on muscle and bone with aging especially in combination with exercise. These effects were independent of bone marrow fat, suggesting that intrinsic musculoskeletal adaptions were responsible for these beneficial effects.
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Affiliation(s)
- Yukiko Kitase
- Department of Anatomy, Cell Biology and Physiology, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | - Julian A. Vallejo
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA,Department of Biomedical Sciences, School of Medicine, University of Missouri, Kansas City, MO 64108, USA
| | - Sarah L. Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Yixia Xie
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Mark Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - LeAnn Tiede-Lewis
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - David Moore
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Anthony Meljanac
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Corrine Kumar
- Department of Anatomy, Cell Biology and Physiology, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | - Carrie Zhao
- Department of Anatomy, Cell Biology and Physiology, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | - Jennifer Rosser
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Marco Brotto
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas, Arlington, TX 76019, USA
| | - Mark L. Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
| | - Ziyue Liu
- Department of Biostatistics and Health Data Science, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | - Michael J. Wacker
- Department of Biomedical Sciences, School of Medicine, University of Missouri, Kansas City, MO 64108, USA
| | - Lynda Bonewald
- Department of Orthopaedic Surgery, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
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15
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Mayerl CJ, Adjerid KA, Edmonds CE, Gould FDH, Johnson ML, Steer KE, Bond LE, German RZ. Regional Variation in Contractile Patterns and Muscle Activity in Infant Pig Feeding. Integr Org Biol 2022; 4:obac046. [PMID: 36531210 PMCID: PMC9756950 DOI: 10.1093/iob/obac046] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023] Open
Abstract
At the level of the whole muscle, contractile patterns during activity are a critical and necessary source of variation in function. Understanding if a muscle is actively lengthening, shorting, or remaining isometric has implications for how it is working to power a given behavior. When feeding, the muscles associated with the tongue, jaws, pharynx, and hyoid act together to transport food through the oral cavity and into the esophagus. These muscles have highly coordinated firing patterns, yet also exhibit high levels of regional heterogeneity in both their timing of activity and their contractile characteristics when active. These high levels of variation make investigations into function challenging, especially in systems where muscles power multiple behaviors. We used infant pigs as a model system to systematically evaluate variation in muscle firing patterns in two muscles (mylohyoid and genioglossus) during two activities (sucking and swallowing). We also evaluated the contractile characteristics of mylohyoid during activity in the anterior and posterior regions of the muscle. We found that the posterior regions of both muscles had different patterns of activity during sucking versus swallowing, whereas the anterior regions of the muscles did not. Furthermore, the anterior portion of mylohyoid exhibited concentric contractions when active during sucking, whereas the posterior portion was isometric during sucking and swallowing. This difference suggests that the anterior portion of mylohyoid in infant pigs is functioning in concert with the tongue and jaws to generate suction, whereas the posterior portion is likely acting as a hyoid stabilizer during sucking and swallowing. Our results demonstrate the need to evaluate both the contractile characteristics and activity patterns of a muscle in order to understand its function, especially in cases where there is potential for variation in either factor within a single muscle.
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Affiliation(s)
- C J Mayerl
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - K A Adjerid
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, 70118, USA
| | - C E Edmonds
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - F D H Gould
- Rowan University School of Osteopathic Medicine, Stratford, NJ, 08084, USA
| | - M L Johnson
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - K E Steer
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - L E Bond
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - R Z German
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
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16
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Srivastava T, Garola RE, Zhou J, Boinpelly VC, Priya L, Ali MF, Rezaiekhaligh MH, Heruth DP, Novak J, Alon US, Joshi T, Jiang Y, McCarthy ET, Savin VJ, Johnson ML, Sharma R, Sharma M. Prostanoid receptors in hyperfiltration-mediated glomerular injury: Novel agonists and antagonists reveal opposing roles for EP2 and EP4 receptors. FASEB J 2022; 36:e22559. [PMID: 36125047 DOI: 10.1096/fj.202200875r] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/23/2022] [Accepted: 09/07/2022] [Indexed: 11/11/2022]
Abstract
Increased fluid-flow shear stress (FFSS) contributes to hyperfiltration-induced podocyte and glomerular injury resulting in progression of chronic kidney disease (CKD). We reported that increased FFSS in vitro and in vivo upregulates PGE2 receptor EP2 (but not EP4 expression), COX2-PGE2 -EP2 axis, and EP2-linked Akt-GSK3β-β-catenin signaling pathway in podocytes. To understand and use the disparities between PGE2 receptors, specific agonists, and antagonists of EP2 and EP4 were used to assess phosphorylation of Akt, GSK3β and β-catenin in podocytes using Western blotting, glomerular filtration barrier function using in vitro albumin permeability (Palb ) assay, and mitigation of hyperfiltration-induced injury in unilaterally nephrectomized (UNX) mice at 1 and 6 months. Results show an increase in Palb by PGE2 , EP2 agonist (EP2AGO ) and EP4 antagonist (EP4ANT ), but not by EP2 antagonist (EP2ANT ) or EP4 agonist (EP4AGO ). Pretreatment with EP2ANT blocked the effect of PGE2 or EP2AGO on Palb . Modulation of EP2 and EP4 also induced opposite effects on phosphorylation of Akt and β-Catenin. Individual agonists or antagonists of EP2 or EP4 did not induce significant improvement in albuminuria in UNX mice. However, treatment with a combination EP2ANT + EP4AGO for 1 or 6 months caused a robust decrease in albuminuria. EP2ANT + EP4AGO combination did not impact adaptive hypertrophy or increased serum creatinine. Observed differences between expression of EP2 and EP4 on the glomerular barrier highlight these receptors as potential targets for intervention. Safe and effective mitigating effect of EP2ANT + EP4AGO presents a novel opportunity to delay the progression of hyperfiltration-associated CKD as seen in transplant donors.
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Affiliation(s)
- Tarak Srivastava
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA.,Midwest Veterans' Biomedical Research Foundation (MVBRF), Kansas City, Missouri, USA.,Department of Oral and Craniofacial Sciences, University of Missouri at Kansas City-School of Dentistry, Kansas City, Missouri, USA
| | - Robert E Garola
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Jianping Zhou
- Midwest Veterans' Biomedical Research Foundation (MVBRF), Kansas City, Missouri, USA.,Renal Research Laboratory, Kansas City VA Medical Center, Kansas City, Missouri, USA
| | - Varun C Boinpelly
- Midwest Veterans' Biomedical Research Foundation (MVBRF), Kansas City, Missouri, USA.,Renal Research Laboratory, Kansas City VA Medical Center, Kansas City, Missouri, USA
| | - Lakshmi Priya
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Mohammed Farhan Ali
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Mohammad H Rezaiekhaligh
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Daniel P Heruth
- Children's Mercy Research Institute, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Uri S Alon
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City, Kansas City, Missouri, USA
| | - Trupti Joshi
- Department of Health Management and Informatics, University of Missouri, Columbia, Missouri, USA.,Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, Missouri, USA.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, USA.,MU Institute for Data Science and Informatics, University of Missouri, Columbia, Missouri, USA
| | - Yuexu Jiang
- Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, Missouri, USA.,Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, USA
| | - Ellen T McCarthy
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Virginia J Savin
- Renal Research Laboratory, Kansas City VA Medical Center, Kansas City, Missouri, USA.,Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, University of Missouri at Kansas City-School of Dentistry, Kansas City, Missouri, USA
| | - Ram Sharma
- Renal Research Laboratory, Kansas City VA Medical Center, Kansas City, Missouri, USA
| | - Mukut Sharma
- Midwest Veterans' Biomedical Research Foundation (MVBRF), Kansas City, Missouri, USA.,Renal Research Laboratory, Kansas City VA Medical Center, Kansas City, Missouri, USA.,Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas, USA
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17
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Johnson ML, Walsh SE. Food Assistance Programs and Reduced Hospitalizations for Older Adults with Diabetes. J Frailty Aging 2022; 12:67-70. [PMID: 36629087 DOI: 10.14283/jfa.2022.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Diabetes is an increasingly common and costly condition for older adults. Each year, as many as 1 in 3 Medicare dollars is spent to treat and manage diabetes and associated comorbidities for people with diabetes. To control health care spending in the US, it is imperative that we identify factors for reducing hospitalizations for these individuals. The purpose of this cross-sectional study was to identify predictors of hospitalization in the past 12 months for community-dwelling older adults with diabetes. Data from round five of the National Health and Aging Trends Study were analyzed to assess the impact of food assistance programs on the risk of hospitalization in the past 12 months for 1094 Medicare recipients ages 65 and older with diabetes. Previous research on the social determinants of health has demonstrated that social stressors like poverty and exposure to racism are associated with poorer health outcomes overall, but we did not find a statistically-significant association between race, gender, age or Medicare/ Medicaid dual-eligibility and hospitalization for our study population. Notably, receipt of Supplemental Nutrition Assistance Program (SNAP) benefits, Meals on Wheels services or other food assistance was associated with a 43% reduction in the risk of hospitalization in the past 12 months. Food assistance programs appear to be a promising strategy for reducing hospitalizations associated with diabetes and its comorbidities. Primary care providers, diabetes educators and other health professionals should be more proactive in their referrals to food assistance programs and other community supports.
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Affiliation(s)
- M L Johnson
- Sarah E. Walsh, 340 Marshall, School of Health Sciences, Eastern Michigan University, Ypsilanti, MI 48197, Phone 734.487.2364 / Fax 734.487.4095,
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18
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Schoenfeld AJ, Antonia SJ, Awad MM, Felip E, Gainor J, Gettinger SN, Hodi FS, Johnson ML, Leighl NB, Lovly CM, Mok T, Perol M, Reck M, Solomon B, Soria JC, Tan DSW, Peters S, Hellmann MD. Clinical definition of acquired resistance to immunotherapy in patients with metastatic non-small-cell lung cancer. Ann Oncol 2021; 32:1597-1607. [PMID: 34487855 DOI: 10.1016/j.annonc.2021.08.2151] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 12/16/2022] Open
Abstract
Acquired resistance (AR) to programmed cell death protein 1/programmed death-ligand 1 [PD-(L)1] blockade is frequent in non-small-cell lung cancer (NSCLC), occurring in a majority of initial responders. Patients with AR may have unique properties of persistent antitumor immunity that could be re-harnessed by investigational immunotherapies. The absence of a consistent clinical definition of AR to PD-(L)1 blockade and lack of uniform criteria for ensuing enrollment in clinical trials remains a major barrier to progress; such clinical definitions have advanced biologic and therapeutic discovery. We examine the considerations and potential controversies in developing a patient-level definition of AR in NSCLC treated with PD-(L)1 blockade. Taking into account the specifics of NSCLC biology and corresponding treatment strategies, we propose a practical, clinical definition of AR to PD-(L)1 blockade for use in clinical reports and prospective clinical trials. Patients should meet the following criteria: received treatment that includes PD-(L)1 blockade; experienced objective response on PD-(L)1 blockade (inclusion of a subset of stable disease will require future investigation); have progressive disease occurring within 6 months of last anti-PD-(L)1 antibody treatment or rechallenge with anti-PD-(L)1 antibody in patients not exposed to anti-PD-(L)1 in 6 months.
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Affiliation(s)
- A J Schoenfeld
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, USA; Druckenmiller Center for Lung Cancer Research, Memorial Sloan Kettering Cancer Center, New York, USA
| | - S J Antonia
- Department of Medical Oncology, Duke Cancer Institute, Duke University Medical Center, Durham, USA
| | - M M Awad
- Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - E Felip
- Vall d'Hebron University Hospital, Barcelona, Spain
| | - J Gainor
- Department of Medicine, Massachusetts General Hospital Cancer Center, Boston, USA; Harvard Medical School, Boston, USA
| | - S N Gettinger
- Department of Medicine, Medical Oncology, Yale School of Medicine, New Haven, USA
| | - F S Hodi
- Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - M L Johnson
- Department of Medicine, Sarah Cannon Research Institute, Nashville, USA
| | - N B Leighl
- Princess Margaret Cancer Centre, Toronto, Canada
| | - C M Lovly
- Department of Medicine and Vanderbilt Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, USA
| | - T Mok
- State Key Laboratory of Translational Oncology, Department of Clinical Oncology, Chinese University of Hong Kong, Hong Kong, China
| | - M Perol
- Department of Medical Oncology, Centre Léon Bérard, Lyon, France
| | - M Reck
- Department of Thoracic Oncology, Airway Research Center North (ARCN), German Center for Lung Research, LungenClinic Grosshansdorf, Grosshansdorf, Germany
| | - B Solomon
- Peter MacCallum Cancer Center, Melbourne, Australia
| | - J-C Soria
- Department of Medical Oncology, Gustave Roussy Cancer Campus, Villejuif, France
| | - D S W Tan
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore
| | - S Peters
- Oncology Department, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - M D Hellmann
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, USA.
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19
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Jackson E, Lara-Castillo N, Akhter MP, Dallas M, Scott JM, Ganesh T, Johnson ML. Osteocyte Wnt/β-catenin pathway activation upon mechanical loading is altered in ovariectomized mice. Bone Rep 2021; 15:101129. [PMID: 34584905 PMCID: PMC8455641 DOI: 10.1016/j.bonr.2021.101129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 09/09/2021] [Indexed: 11/23/2022] Open
Abstract
Estrogen levels decline in both sexes with age, but more dramatically in females. Activation of the Wnt/β-catenin signaling pathway is central to the regulation of bone mass accrual and maintenance and in response to mechanical loading. Using the ovariectomized mouse model we examined the effect of estrogen loss on the osteocyte's ability to activate the Wnt/β-catenin pathway following mechanical loading. Female TOPGAL mice underwent ovariectomy (OVX) (n = 10) or sham surgery (n = 10) at 16 weeks of age. Four weeks post-surgery, a single loading session (global strain of 2200 με for 100 cycles at 2 Hz) was performed on the right forearm with the left as a non-loaded control. Mice (n = 5) were sacrificed at 1 or 24 hr post-load. Ulnae were stained for β-catenin activation, femurs were used for μCT and 3-pt bending/biomechanical testing, and tibiae were used for histology analysis and to determine osteocyte lacunar size using SEM and high resolution micro-XCT. A 2.2-fold increase in β-catenin signaling activation was observed 24 hr post-load in the Sham group but did not occur in the OVX group. The OVX group versus control had significant losses (p < 0.05) in trabecular BMD (−8%), BV/TV (−35%) and thickness (−23%), along with cortical thickness (−6%) and periosteal perimeter (−4%). The OVX group had significantly higher trabecular bone osteoclast numbers (63%), OCS/BS (77%) and N.OC/BPm (94%) and a significant decrease in osteoblast number (53%), OBS/BS (37%) and N.OB/BPm (40%) compared to the sham group (p < 0.05). Cortical bone lacunar number/lacunar volume and bone biomechanical properties did not change between groups. Given that the ulna is a cortical bone loading model and the lack of changes in osteocyte lacunar number/volume in cortical bone, which would alter strains experienced by osteocytes, these data suggest the absence of estrogen resulted in intrinsic changes in the ability of the osteocyte to respond to mechanical load, rather than changes in the biomechanical and architectural properties of bone. In vivo mechanical loading activates β-catenin signaling in osteocytes. Ovariectomy induced estrogen loss attenuates in vivo loading induced β-catenin signaling in osteocytes. Changes in bone material and architectural properties do not appear to explain attenuated pathway activation. Our data suggests estrogen loss alters the intrinsic ability of the osteocyte to respond to mechanical load.
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Affiliation(s)
- Erica Jackson
- UMKC, School of Dentistry, Kansas City, MO 64108, United States of America
| | | | - Mohammed P. Akhter
- Creighton University, Osteoporosis Research Center, Omaha, NE 68122, United States of America
| | - Mark Dallas
- UMKC, School of Dentistry, Kansas City, MO 64108, United States of America
| | - JoAnna M. Scott
- UMKC, School of Dentistry, Kansas City, MO 64108, United States of America
| | - Thiagarajan Ganesh
- UMKC, School of Computing and Engineering, Kansas City, MO 64110, United States of America
| | - Mark L. Johnson
- UMKC, School of Dentistry, Kansas City, MO 64108, United States of America
- Corresponding author.
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20
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Srivastava T, Heruth DP, Duncan RS, Rezaiekhaligh MH, Garola RE, Priya L, Zhou J, Boinpelly VC, Novak J, Ali MF, Joshi T, Alon US, Jiang Y, McCarthy ET, Savin VJ, Sharma R, Johnson ML, Sharma M. Transcription Factor β-Catenin Plays a Key Role in Fluid Flow Shear Stress-Mediated Glomerular Injury in Solitary Kidney. Cells 2021; 10:cells10051253. [PMID: 34069476 PMCID: PMC8159099 DOI: 10.3390/cells10051253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/06/2021] [Accepted: 05/14/2021] [Indexed: 01/21/2023] Open
Abstract
Increased fluid flow shear stress (FFSS) in solitary kidney alters podocyte function in vivo. FFSS-treated cultured podocytes show upregulated AKT-GSK3β-β-catenin signaling. The present study was undertaken to confirm (i) the activation of β-catenin signaling in podocytes in vivo using unilaterally nephrectomized (UNX) TOPGAL mice with the β-galactosidase reporter gene for β-catenin activation, (ii) β-catenin translocation in FFSS-treated mouse podocytes, and (iii) β-catenin signaling using publicly available data from UNX mice. The UNX of TOPGAL mice resulted in glomerular hypertrophy and increased the mesangial matrix consistent with hemodynamic adaptation. Uninephrectomized TOPGAL mice showed an increased β-galactosidase expression at 4 weeks but not at 12 weeks, as assessed using immunofluorescence microscopy (p < 0.001 at 4 weeks; p = 0.16 at 12 weeks) and X-gal staining (p = 0.008 at 4 weeks; p = 0.65 at 12 weeks). Immunofluorescence microscopy showed a significant increase in phospho-β-catenin (Ser552, p = 0.005) at 4 weeks but not at 12 weeks (p = 0.935) following UNX, and the levels of phospho-β-catenin (Ser675) did not change. In vitro FFSS caused a sustained increase in the nuclear translocation of phospho-β-catenin (Ser552) but not phospho-β-catenin (Ser675) in podocytes. The bioinformatic analysis of the GEO dataset, #GSE53996, also identified β-catenin as a key upstream regulator. We conclude that transcription factor β-catenin mediates FFSS-induced podocyte (glomerular) injury in solitary kidney.
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Affiliation(s)
- Tarak Srivastava
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA; (M.H.R.); (L.P.); (M.F.A.); (U.S.A.)
- Midwest Veterans’ Biomedical Research Foundation (MVBRF), Kansas City, MO 64128, USA; (J.Z.); (V.C.B.); (M.S.)
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri at Kansas City, Kansas City, MO 64108, USA;
- Correspondence: ; Tel.: +1-816-234-3010; Fax: +1-816-302-9919
| | - Daniel P. Heruth
- Children’s Mercy Research Institute, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA;
| | - R. Scott Duncan
- School of Biological Sciences, University of Missouri at Kansas City, Kansas City, MO 64108, USA;
| | - Mohammad H. Rezaiekhaligh
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA; (M.H.R.); (L.P.); (M.F.A.); (U.S.A.)
| | - Robert E. Garola
- Department of Pathology and Laboratory Medicine, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA;
| | - Lakshmi Priya
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA; (M.H.R.); (L.P.); (M.F.A.); (U.S.A.)
| | - Jianping Zhou
- Midwest Veterans’ Biomedical Research Foundation (MVBRF), Kansas City, MO 64128, USA; (J.Z.); (V.C.B.); (M.S.)
- Kansas City VA Medical Center, Kansas City, MO 64128, USA; (V.J.S.); (R.S.)
| | - Varun C. Boinpelly
- Midwest Veterans’ Biomedical Research Foundation (MVBRF), Kansas City, MO 64128, USA; (J.Z.); (V.C.B.); (M.S.)
- Kansas City VA Medical Center, Kansas City, MO 64128, USA; (V.J.S.); (R.S.)
| | - Jan Novak
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35487, USA;
| | - Mohammed Farhan Ali
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA; (M.H.R.); (L.P.); (M.F.A.); (U.S.A.)
| | - Trupti Joshi
- Department of Health Management and Informatics, University of Missouri, Columbia, MO 65211, USA;
- Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO 65211, USA;
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
- MU Data Science and Informatics Institute, University of Missouri, Columbia, MO 65211, USA
| | - Uri S. Alon
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri at Kansas City, Kansas City, MO 64108, USA; (M.H.R.); (L.P.); (M.F.A.); (U.S.A.)
| | - Yuexu Jiang
- Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO 65211, USA;
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA
| | - Ellen T. McCarthy
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS 66160, USA;
| | - Virginia J. Savin
- Kansas City VA Medical Center, Kansas City, MO 64128, USA; (V.J.S.); (R.S.)
| | - Ram Sharma
- Kansas City VA Medical Center, Kansas City, MO 64128, USA; (V.J.S.); (R.S.)
| | - Mark L. Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri at Kansas City, Kansas City, MO 64108, USA;
| | - Mukut Sharma
- Midwest Veterans’ Biomedical Research Foundation (MVBRF), Kansas City, MO 64128, USA; (J.Z.); (V.C.B.); (M.S.)
- Kansas City VA Medical Center, Kansas City, MO 64128, USA; (V.J.S.); (R.S.)
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS 66160, USA;
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21
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Mumtaz H, Lara-Castillo N, Scott JM, Begonia M, Dallas M, Johnson ML, Ganesh T. Age and gender related differences in load-strain response in C57Bl/6 mice. Aging (Albany NY) 2020; 12:24721-24733. [PMID: 33346747 PMCID: PMC7803533 DOI: 10.18632/aging.202350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 09/09/2020] [Indexed: 06/12/2023]
Abstract
We examined the changes in mechanical strain response of male and female mouse tibia and ulna, using axial compression tests, to assess age-related changes in tibiae and ulnae by a non-contact strain measurement technique called the digital image correlation (DIC) and the standard strain gage. A unique aspect of the study was to compare bones from the same animal to study variations in behavior with aging. This study was conducted using male and female C57Bl/6 mice at 6, 12 and 22 months of age (N=6-7 per age and sex) using three load levels. The DIC technique was able to detect a greater number of statistically significant differences in comparison to the strain gaging method. Male ulna showed significantly higher DIC strains compared to strains captured from strain gage at all three levels of load at 6 months and in the lowest load at 12 months. DIC measurements revealed that the ulna becomes stiffer with aging for both males and females, which resulted in 0.4 to 0.8 times reduced strains in the 22-month group compared to the 6 month group. Male tibia showed three-fold increased strains in the 22 months group at 11.5 N load compared to 6 months group (p<.05).
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Affiliation(s)
- Hammad Mumtaz
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, Kansas, MO 64110, USA
| | - Nuria Lara-Castillo
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas, MO 64108, USA
| | - JoAnna M. Scott
- University of Missouri-Kansas City, Office of Research and Graduate Programs, Kansas, MO 64108, USA
| | - Mark Begonia
- Virginia Polytechnic Institute and State University, Biomedical Engineering and Mechanics, Blacksburg, VA 24061, USA
| | - Mark Dallas
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas, MO 64108, USA
| | - Mark L. Johnson
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas, MO 64108, USA
| | - Thiagarajan Ganesh
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, Kansas, MO 64110, USA
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22
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Abstract
PURPOSE OF REVIEW The purpose of this review is to describe the current state of our thinking regarding bone-muscle interactions beyond the mechanical perspective. RECENT FINDINGS Recent and prior evidence has begun to dissect many of the molecular mechanisms that bone and muscle use to communicate with each other and to modify each other's function. Several signaling factors produced by muscle and bone have emerged as potential mediators of these biochemical/molecular interactions. These include muscle factors such as myostatin, Irisin, BAIBA, IL-6, and the IGF family and the bone factors FGF-23, Wnt1 and Wnt3a, PGE2, FGF9, RANKL, osteocalcin, and sclerostin. The identification of these signaling molecules and their underlying mechanisms offers the very real and exciting possibility that new pharmaceutical approaches can be developed that will permit the simultaneous treatments of diseases that often occur in combination, such as osteoporosis and sarcopenia.
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Affiliation(s)
- Nuria Lara-Castillo
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO, 64108, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO, 64108, USA.
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Mumtaz H, Dallas M, Begonia M, Lara-Castillo N, Scott JM, Johnson ML, Ganesh T. Age-related and sex-specific effects on architectural properties and biomechanical response of the C57BL/6N mouse femur, tibia and ulna. Bone Rep 2020; 12:100266. [PMID: 32420415 PMCID: PMC7215114 DOI: 10.1016/j.bonr.2020.100266] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/30/2020] [Accepted: 04/02/2020] [Indexed: 12/22/2022] Open
Abstract
Aging is known to reduce bone quality and bone strength. We sought to determine how aging affects the biomechanical and architectural properties of various long bones, and if sex influences age related differences/changes. While researchers have extensively studied these changes in individual bones of mice, there is no comprehensive study of the changes in the bones from the same mice to study the changes with aging. We performed three point bending tests and microcomputed tomography (microCT) analysis on femurs, tibiae and ulnae. Three point bending tests were utilized to calculate biomechanical parameters and imaging was also performed using high resolution microCT to reveal both cortical and trabecular microarchitecture C57BL/6N mice were divided into three age groups: 6, 12 and 22 months. Each age and sex group consisted of 6–7 mice. The ultimate load to failure (UL), elastic stiffness (ES), modulus of elasticity (E) and the moment of inertia about bending axis (MOI) for each bone was calculated using three point bending test. MicroCT scans of all the bones were analyzed to determine cortical bone volume per tissue volume (C.BV/TV), trabecular bone volume per tissue volume (Tb.BV/TV), cortical bone area (B.Ar) using CTAn's microCT analysis and tested for correlation with the biomechanical parameters. Mean (standard error) values of UL in femur decreased from 19.8(0.6) N to 12.8(1.1) N (p < .01) and 17.9(0.6) N to 14.6(1.0) N (p = .02) from 6 to 22 months groups in males and females respectively. Similarly, UL in tibia decreased from 19.8(0.5) N to 14.3(0.2) N (p < .01) and 14.4(0.6) N to 9.5(1.0) N (p < .01) from 6 to 22 months group in males and females respectively. ES in femur decreased from 113.2(7) N/mm to 69.6(6.7) N/mm (p < .01) from 6 to 22 months in males only. ES in tibia decreased from 78.6(3.2) N/mm to 65.0(2.3) N/mm (p = .01) and 53.1(2.9) N/mm to 44.0(1.7) N/mm (p = .02) from 6 to 22 months in males and females respectively. Interestingly, ES in ulna increased from 8.2(0.8) N/mm to 10.9(1.0) N/mm (p = .051) from 6 to 22 months of age in females only. E in femur decreased from 4.0(0.4) GPa to 2.8(0.2) GPa (p = .01) and 6.7(0.5) GPa to 4.5(0.4) GPa (p = .01) from 6 to 22 months of age in males and females respectively while tibia showed no change. However, E in ulna increased from 7.0(0.8) GPa to 11.0(1.1) GPa (p = .01) from 6 to 22 months of age in females only. Changes in age and sex-related bone properties were more pronounced in the femur and tibia, while the ulna showed fewer overall differences. Most of the changes were observed in biomechanical compared to architectural properties and female bones are more severely affected by aging. In conclusion, our data demonstrate that care must be taken to describe bone site and sex-specific, rather than making broad generalizations when describing age-related changes on the biomechanical and architectural properties of the skeleton. Assess age/gender related biomechanical property changes in femur, tibiae and ulnae. C57Bl/6 mice were divided into three age groups: 6, 12 and 22 months. Significant decline in the biomechanical response of femurs and tibiae at the age of 22 months. Ulnae showed some improved properties with aging. Aging affected biomechanical rather than microCT properties and female bones
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Affiliation(s)
- Hammad Mumtaz
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA
| | - Mark Dallas
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - Mark Begonia
- Virginia Polytechnic Institute and State University, Biomedical Engineering and Mechanics, 343 Kelly Hall, 325 Stanger Street MC 0298, Blacksburg, VA 24061, USA
| | - Nuria Lara-Castillo
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - JoAnna M Scott
- University of Missouri-Kansas City, Office of Research and Graduate Programs, Kansas City, MO 64108, USA
| | - Mark L Johnson
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - Thiagarajan Ganesh
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA
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Taylor EA, Donnelly E, Yao X, Johnson ML, Amugongo SK, Kimmel DB, Lane NE. Sequential Treatment of Estrogen Deficient, Osteopenic Rats with Alendronate, Parathyroid Hormone (1-34), or Raloxifene Alters Cortical Bone Mineral and Matrix Composition. Calcif Tissue Int 2020; 106:303-314. [PMID: 31784772 DOI: 10.1007/s00223-019-00634-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 11/11/2019] [Indexed: 12/26/2022]
Abstract
Anti-resorptive and anabolic treatments can be used sequentially to treat osteoporosis, but their effects on bone composition are incompletely understood. Osteocytes may influence bone tissue composition with sequential therapies because bisphosphonates diffuse into the canalicular network and anabolic treatments increase osteocyte lacunar size. Cortical bone composition of osteopenic, ovariectomized (OVX) rats was compared to that of Sham-operated rats and OVX rats given monotherapy or sequential regimens of single approved anti-osteoporosis medications. Adult female Sprague-Dawley rats were OVX (N = 37) or Sham-OVXd (N = 6). After 2 months, seven groups of OVX rats were given three consecutive 3-month periods of treatment with vehicle (V), h-PTH (1-34) (P), alendronate (A), or raloxifene (R), using the following orders: VVV, PVV, RRR, RPR, AAA, AVA, and APA. Compositional properties around osteocyte lacunae of the left tibial cortex were assessed from Raman spectra in perilacunar and non-perilacunar bone matrix regions. Sequential treatments involving parathyroid hormone (PTH) caused lower mean collagen maturity relative to monotherapies. Mean mineral:matrix ratio was 2.2% greater, mean collagen maturity was 1.4% greater, and mean carbonate:phosphate ratio was 2.2% lower in the perilacunar than in the non-perilacunar bone matrix region (all P < 0.05). These data demonstrate cortical bone tissue composition differences around osteocytes caused by sequential treatment with anti-osteoporosis medications. We speculate that the region-specific differences demonstrate the ability of osteocytes to alter bone tissue composition adjacent to lacunae.
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Affiliation(s)
- Erik A Taylor
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA
| | - Eve Donnelly
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY, USA
- Research Division, Hospital for Special Surgery, New York, NY, USA
| | - Xiaomei Yao
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Sarah K Amugongo
- Center for Musculoskeletal Health, University of California Davis Medical Center, Sacramento, CA, USA
| | - Donald B Kimmel
- Department of Physiological Sciences, University of Florida, Gainesville, FL, USA
| | - Nancy E Lane
- Center for Musculoskeletal Health, University of California Davis Medical Center, Sacramento, CA, USA.
- Health Center, University of California At Davis, 4625 Second Avenue, Suite 2006, Sacramento, CA, 95817, USA.
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Thiagarajan G, Begonia MT, Dallas M, Lara-Castillo N, Scott JM, Johnson ML. Determination of Elastic Modulus in Mouse Bones Using a Nondestructive Micro-Indentation Technique Using Reference Point Indentation. J Biomech Eng 2019; 140:2679246. [PMID: 29801077 DOI: 10.1115/1.4039982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Indexed: 11/08/2022]
Abstract
The determination of the elastic modulus of bone is important in studying the response of bone to loading and is determined using a destructive three-point bending method. Reference point indentation (RPI), with one cycle of indentation, offers a nondestructive alternative to determine the elastic modulus. While the elastic modulus could be determined using a nondestructive procedure for ex vivo experiments, for in vivo testing, the three-point bending technique may not be practical and hence RPI is viewed as a potential alternative and explored in this study. Using the RPI measurements, total indentation distance (TID), creep indentation distance, indentation force, and the unloading slope, we have developed a numerical analysis procedure using the Oliver-Pharr (O/P) method to estimate the indentation elastic modulus. Two methods were used to determine the area function: (1) Oliver-Pharr (O/P-based on a numerical procedure) and (2) geometric (based on the calculation of the projected area of indentation). The indentation moduli of polymethyl methacrylate (PMMA) calculated by the O/P (3.49-3.68 GPa) and geometric (3.33-3.49 GPa) methods were similar to values in literature (3.5-4 GPa). In a study using femurs from C57Bl/6 mice of different ages and genders, the three-point bending modulus was lower than the indentation modulus. In femurs from 4 to 5 months old TOPGAL mice, we found that the indentation modulus from the geometric (5.61 ± 1.25 GPa) and O/P (5.53 ± 1.27 GPa) methods was higher than the three-point bending modulus (5.28 ± 0.34 GPa). In females, the indentation modulus from the geometric (7.45 ± 0.86 GPa) and O/P (7.46 ± 0.92 GPa) methods was also higher than the three-point bending modulus (7.33 ± 1.13 GPa). We can conclude from this study that the RPI determined values are relatively close to three-point bending values.
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Affiliation(s)
- Ganesh Thiagarajan
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110 e-mail:
| | - Mark T Begonia
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110
| | - Mark Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO 64108
| | - Nuria Lara-Castillo
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO 64108
| | - JoAnna M Scott
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO 64108
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO 64108
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Maurel DB, Matsumoto T, Vallejo JA, Johnson ML, Dallas SL, Kitase Y, Brotto M, Wacker MJ, Harris MA, Harris SE, Bonewald LF. Characterization of a novel murine Sost ER T2 Cre model targeting osteocytes. Bone Res 2019; 7:6. [PMID: 30820362 PMCID: PMC6382861 DOI: 10.1038/s41413-018-0037-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 09/25/2018] [Accepted: 10/19/2018] [Indexed: 12/28/2022] Open
Abstract
Transgenic mice are widely used to delete or overexpress genes in a cell specific manner to advance knowledge of bone biology, function and disease. While numerous Cre models exist to target gene recombination in osteoblasts and osteoclasts, few target osteocytes specifically, particularly mature osteocytes. Our goal was to create a spatial and temporal conditional Cre model using tamoxifen to induce Cre activity in mature osteocytes using a Bac construct containing the 5' and 3' regions of the Sost gene (Sost ERT2 Cre). Four founder lines were crossed with the Ai9 Cre reporter mice. One founder line showed high and specific activity in mature osteocytes. Bones and organs were imaged and fluorescent signal quantitated. While no activity was observed in 2 day old pups, by 2 months of age some osteocytes were positive as osteocyte Cre activity became spontaneous or 'leaky' with age. The percentage of positive osteocytes increased following tamoxifen injection, especially in males, with 43% to 95% positive cells compared to 19% to 32% in females. No signal was observed in any bone surface cell, bone marrow, nor in muscle with or without tamoxifen injection. No spontaneous signal was observed in any other organ. However, with tamoxifen injection, a few positive cells were observed in kidney, eye, lung, heart and brain. All other organs, 28 in total, were negative with tamoxifen injection. However, with age, a muscle phenotype was apparent in the Sost-ERT2 Cre mice. Therefore, although this mouse model may be useful for targeting gene deletion or expression to mature osteocytes, the muscle phenotype may restrict the use of this model to specific applications and should be considered when interpreting data.
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Affiliation(s)
- Delphine B Maurel
- 1Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO USA.,7Present Address: Pharmaceutical Sciences Department, Universite de Bordeaux, Bio-Tis, INSERM Unité 1026 BioTis, 146 Rue Léo Saignat, 33076 Bordeaux, France
| | - Tsutomu Matsumoto
- 2Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN USA
| | - Julian A Vallejo
- 1Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO USA
| | - Mark L Johnson
- 1Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO USA
| | - Sarah L Dallas
- 1Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO USA
| | - Yukiko Kitase
- 2Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN USA
| | - Marco Brotto
- 3Bone-Muscle Collaborative Sciences, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, USA
| | - Michael J Wacker
- 4Department of Biomedical Sciences, University of Missouri-Kansas City School of Medicine, Kansas City, MO USA
| | - Marie A Harris
- 5University of Texas Health Science Center, San Antonio, TX USA
| | | | - Lynda F Bonewald
- 1Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO USA.,2Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN USA.,6Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN USA
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Blevins CH, Dierkhising RA, Geno DM, Johnson ML, Vela MF, Ravi K, Iyer PG, Katzka DA. Obesity and GERD impair esophageal epithelial permeability through 2 distinct mechanisms. Neurogastroenterol Motil 2018; 30:e13403. [PMID: 30062771 DOI: 10.1111/nmo.13403] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 05/29/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND The mechanism by which obesity leads to damage independent of reflux is unclear. We aimed to determine the influence of obesity on mean nocturnal baseline impedance (MNBI), a functional measure of the epithelial barrier, in the presence and absence of acid reflux, using ambulatory pH impedance measurements. METHODS Twenty-four-hour pH impedance studies performed off medications in Caucasian men with a normal endoscopic examination were assessed for level of acid exposure and MNBI. Four patient groups were studied: Group 1, Not obese and normal acid exposure; Group 2, Obese and normal acid exposure; Group 3, Not obese and increased acid exposure; and Group 4, Obese with increased acid exposure. RESULTS One hundred patients were studied (25 in each group). Mean esophageal mucosal impedance (MI) was substantially lower in obese patients without reflux (Group 2) and non-obese patients with reflux (Group 3) compared to normal controls (non-obese, no reflux, Group 1). MI was progressively lower in the distal (vs the proximal) esophagus in GER patients, compared to those without GER. This difference persisted in the presence or absence of obesity. In contrast, in obese patients, the mean MI was significantly lower throughout the esophagus when compared to the non-obese patients and also persisted in the presence and absence of accompanying reflux. Obesity and reflux were both independently negatively correlated with MI. CONCLUSION Obesity is associated with abnormal esophageal MNBI. In contrast to gastro-esophageal reflux, this decrease is pan-esophageal. These data may support a systemic mechanism by which obesity alters the esophageal barrier function.
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Affiliation(s)
- C H Blevins
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
| | - R A Dierkhising
- Division of Biomedical Statistics and Informatics, Mayo Clinic Minnesota, Rochester, MN, USA
| | - D M Geno
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
| | - M L Johnson
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
| | - M F Vela
- Division of Gastroenterology and Hepatology, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - K Ravi
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
| | - P G Iyer
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
| | - D A Katzka
- Division of Gastroenterology and Hepatology, Mayo Clinic Minnesota, Rochester, MN, USA
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Srivastava T, Dai H, Heruth DP, Alon US, Garola RE, Zhou J, Duncan RS, El-Meanawy A, McCarthy ET, Sharma R, Johnson ML, Savin VJ, Sharma M. Mechanotransduction signaling in podocytes from fluid flow shear stress. Am J Physiol Renal Physiol 2018; 314:F22-F34. [PMID: 28877882 PMCID: PMC5866353 DOI: 10.1152/ajprenal.00325.2017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/21/2017] [Accepted: 08/28/2017] [Indexed: 12/28/2022] Open
Abstract
Recently, we and others have found that hyperfiltration-associated increase in biomechanical forces, namely, tensile stress and fluid flow shear stress (FFSS), can directly and distinctly alter podocyte structure and function. The ultrafiltrate flow over the major processes and cell body generates FFSS to podocytes. Our previous work suggests that the cyclooxygenase-2 (COX-2)-PGE2-PGE2 receptor 2 (EP2) axis plays an important role in mechanoperception of FFSS in podocytes. To address mechanotransduction of the perceived stimulus through EP2, cultured podocytes were exposed to FFSS (2 dyn/cm2) for 2 h. Total RNA from cells at the end of FFSS treatment, 2-h post-FFSS, and 24-h post-FFSS was used for whole exon array analysis. Differentially regulated genes ( P < 0.01) were analyzed using bioinformatics tools Enrichr and Ingenuity Pathway Analysis to predict pathways/molecules. Candidate pathways were validated using Western blot analysis and then further confirmed to be resulting from a direct effect of PGE2 on podocytes. Results show that FFSS-induced mechanotransduction as well as exogenous PGE2 activate the Akt-GSK3β-β-catenin (Ser552) and MAPK/ERK but not the cAMP-PKA signal transduction cascades. These pathways are reportedly associated with FFSS-induced and EP2-mediated signaling in other epithelial cells as well. The current regimen for treating hyperfiltration-mediated injury largely depends on targeting the renin-angiotensin-aldosterone system. The present study identifies specific transduction mechanisms and provides novel information on the direct effect of FFSS on podocytes. These results suggest that targeting EP2-mediated signaling pathways holds therapeutic significance for delaying progression of chronic kidney disease secondary to hyperfiltration.
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Affiliation(s)
- Tarak Srivastava
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City , Kansas City, Missouri
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center , Kansas City, Missouri
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri at Kansas City , Kansas City, Missouri
| | - Hongying Dai
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City , Kansas City, Missouri
| | - Daniel P Heruth
- Department of Experimental and Translational Genetics Research, Children's Mercy Hospital and University of Missouri at Kansas City , Kansas City, Missouri
| | - Uri S Alon
- Section of Nephrology, Children's Mercy Hospital and University of Missouri at Kansas City , Kansas City, Missouri
| | - Robert E Garola
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital and University of Missouri at Kansas City , Kansas City, Missouri
| | - Jianping Zhou
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center , Kansas City, Missouri
| | - R Scott Duncan
- Department of Ophthalmology, University of Missouri at Kansas City , Kansas City, Missouri
| | - Ashraf El-Meanawy
- Division of Nephrology, Medical College of Wisconsin , Milwaukee, Wisconsin
| | - Ellen T McCarthy
- Kidney Institute, University of Kansas Medical Center , Kansas City, Kansas
| | - Ram Sharma
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center , Kansas City, Missouri
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri at Kansas City , Kansas City, Missouri
| | - Virginia J Savin
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center , Kansas City, Missouri
- Kidney Institute, University of Kansas Medical Center , Kansas City, Kansas
| | - Mukut Sharma
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center , Kansas City, Missouri
- Kidney Institute, University of Kansas Medical Center , Kansas City, Kansas
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Huang J, Romero-Suarez S, Lara N, Mo C, Kaja S, Brotto L, Dallas SL, Johnson ML, Jähn K, Bonewald LF, Brotto M. Crosstalk between MLO-Y4 osteocytes and C2C12 muscle cells is mediated by the Wnt/β-catenin pathway. JBMR Plus 2017; 1:86-100. [PMID: 29104955 DOI: 10.1002/jbm4.10015] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
We examined the effects of osteocyte secreted factors on myogenesis and muscle function. MLO-Y4 osteocyte-like cell conditioned media (CM) (10%) increased ex vivo soleus muscle contractile force by ~25%. MLO-Y4 and primary osteocyte CM (1-10%) stimulated myogenic differentiation of C2C12 myoblasts, but 10% osteoblast CMs did not enhance C2C12 cell differentiation. Since WNT3a and WNT1 are secreted by osteocytes, and the expression level of Wnt3a is increased in MLO-Y4 cells by fluid flow shear stress, both were compared, showing WNT3a more potent than WNT1 in inducing myogenesis. Treatment of C2C12 myoblasts with WNT3a at concentrations as low as 0.5ng/mL mirrored the effects of both primary osteocyte and MLO-Y4 CM by inducing nuclear translocation of β-catenin with myogenic differentiation, suggesting that Wnts might be potential factors secreted by osteocytes that signal to muscle cells. Knocking down Wnt3a in MLO-Y4 osteocytes inhibited the effect of CM on C2C12 myogenic differentiation. Sclerostin (100ng/mL) inhibited both the effects of MLO-Y4 CM and WNT3a on C2C12 cell differentiation. RT-PCR array results supported the activation of the Wnt/β-catenin pathway by MLO-Y4 CM and WNT3a. These results were confirmed by qPCR showing up-regulation of myogenic markers and two Wnt/β-catenin downstream genes, Numb and Flh1. We postulated that MLO-Y4 CM/WNT3a could modulate intracellular calcium homeostasis as the trigger mechanism for the enhanced myogenesis and contractile force. MLO-Y4 CM and WNT3a increased caffeine-induced Ca2+ release from the sarcoplasmic reticulum (SR) of C2C12 myotubes and the expression of genes directly associated with intracellular Ca2+ signaling and homeostasis. Together, these data show that in vitro and ex vivo, osteocytes can stimulate myogenesis and enhance muscle contractile function and suggest that Wnts could be mediators of bone to muscle signaling, likely via modulation of intracellular Ca2+ signaling and the Wnt/β-Catenin pathway.
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Affiliation(s)
- Jian Huang
- Muscle Biology Research Group-MUBIG, School sof Nursing & Health Studies, University of Missouri- Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA
| | - Sandra Romero-Suarez
- Muscle Biology Research Group-MUBIG, School sof Nursing & Health Studies, University of Missouri- Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA
| | - Nuria Lara
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, MO, 64108, USA
| | - Chenglin Mo
- Muscle Biology Research Group-MUBIG, School sof Nursing & Health Studies, University of Missouri- Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA
| | - Simon Kaja
- Department of Ophthalmology, Vision Research Center, School of Medicine, University of Missouri-Kansas City, 2411 Holmes St., Kansas City, MO, 64108, USA
| | - Leticia Brotto
- Muscle Biology Research Group-MUBIG, School sof Nursing & Health Studies, University of Missouri- Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA
| | - Sarah L Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, MO, 64108, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, MO, 64108, USA
| | - Katharina Jähn
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, MO, 64108, USA
| | - Lynda F Bonewald
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, MO, 64108, USA
| | - Marco Brotto
- Muscle Biology Research Group-MUBIG, School sof Nursing & Health Studies, University of Missouri- Kansas City, 2464 Charlotte Street, Kansas City, MO 64108, USA
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Abstract
PURPOSE OF REVIEW The goal of this paper is to evaluate critically the literature published over the past 3 years regarding the Wnt signaling pathway. The Wnt pathway was found to be involved in bone biology in 2001-2002 with the discovery of a (G171V) mutation in the lipoprotein receptor-related protein 5 (LRP5) that resulted in high bone mass and another mutation that completely inactivated Lrp5 function and resulted in osteoporosis pseudoglioma syndrome (OPPG). The molecular biology has been complex, and very interesting. It has provided many opportunities for exploitation to develop new clinical treatments, particularly for osteoporosis. More clinical possibilities include: treatments for fracture healing, corticosteroid osteoporosis, osteogenesis imperfecta, and others. In addition, we wish to provide historical information coming from distant publications (~350 years ago) regarding bone biology that have been confirmed by study of Wnt signaling. RECENT FINDINGS A recent finding is the development of an antibody to sclerostin that is under study as a treatment for osteoporosis. Development of treatments for other forms of osteoporosis, such as corticosteroid osteoporosis, is also underway. The full range of the applications of the work is not yet been achieved.
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Affiliation(s)
- Mark L Johnson
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO, 64108, USA
| | - Robert R Recker
- Creighton University, 601 N 30th St., Ste 4841, Omaha, NE, 68131, USA.
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Eberhardt W, Garassino MC, Rizvi NA, Besse B, Jänne PA, Peters S, Keong Toh C, Kurata T, Carcereny Costa E, Koczywas M, Felip Font E, Chaft J, Qiu J, Kowanetz M, Zou W, Coleman S, Mocci S, Sandler A, Gettinger S, Johnson ML. Atezolizumab as first-line therapy (1L) for advanced PD-L1-selected NSCLC patients: updated ORR, PFS, OS and exploratory biomarker results from the BIRCH study. Pneumologie 2017. [DOI: 10.1055/s-0037-1598277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- W Eberhardt
- Universitätsklinikum Essen, Ruhrlandklinik, West German Cancer Center, Universität Duisburg-Essen
| | - MC Garassino
- Fondazione Irccs Istituto Nazionale Dei Tumori, Thoracic Oncology Unit
| | - NA Rizvi
- New York-Presbyterian/Columbia University Medical Center
| | - B Besse
- Gustave Roussy, Villejuif France and Paris Sud University
| | | | | | | | - T Kurata
- Kansai Medical University Hirakata Hospital
| | - E Carcereny Costa
- Catalan Institute of Oncology Badalona – Germans Trias I Pujol Hospital Badalona
| | | | | | - J Chaft
- Memorial Sloan Kettering Cancer Center
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Begonia M, Dallas M, Johnson ML, Thiagarajan G. Comparison of strain measurement in the mouse forearm using subject-specific finite element models, strain gaging, and digital image correlation. Biomech Model Mechanobiol 2017; 16:1243-1253. [PMID: 28204985 DOI: 10.1007/s10237-017-0885-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 02/02/2017] [Indexed: 12/31/2022]
Abstract
Mechanical loading in bone leads to the activation of bone-forming pathways that are most likely associated with a minimum strain threshold being experienced by the osteocyte. To investigate the correlation between cellular response and mechanical stimuli, researchers must develop accurate ways to measure/compute strain both externally on the bone surface and internally at the osteocyte level. This study investigates the use of finite element (FE) models to compute bone surface strains on the mouse forearm. Strains from three FE models were compared to data collected experimentally through strain gaging and digital image correlation (DIC). Each FE model was assigned subject-specific bone properties and consisted of one-dimensional springs representing the interosseous membrane. After three-point bending was performed on the ulnae and radii, moment of inertia was determined from microCT analysis of the bone region between the supports and then used along with standard beam analyses to calculate the Young's modulus. Non-contact strain measurements from DIC were determined to be more suitable for validating numerical results than experimental data obtained through conventional strain gaging. When comparing strain responses in the three ulnae, we observed a 3-14% difference between numerical and DIC strains while the strain gage values were 37-56% lower than numerical values. This study demonstrates a computational approach for capturing bone surface strains in the mouse forearm. Ultimately, strains from these macroscale models can be used as inputs for microscale and nanoscale FE models designed to analyze strains directly in the osteocyte lacunae.
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Affiliation(s)
- Mark Begonia
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO, 64110, USA
| | - Mark Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO, 64108, USA
| | - Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, MO, 64108, USA
| | - Ganesh Thiagarajan
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO, 64110, USA.
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Johnson ML, Redmer DA, Reynolds LP, Grazul-Bilska AT. Gap junctional connexin messenger RNA expression in the ovine uterus and placenta: effects of estradiol-17β-treatment, early pregnancy stages, and embryo origin. Domest Anim Endocrinol 2017; 58:104-112. [PMID: 27835804 DOI: 10.1016/j.domaniend.2016.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 09/06/2016] [Accepted: 09/30/2016] [Indexed: 12/17/2022]
Abstract
Gap junctions play a major role in direct, contact-dependent cell-cell communication, and they have been implicated in the regulation of cellular metabolism and the coordination of cellular functions during growth and differentiation of organs and tissues. Gap junctional channels, composed of connexin (Cx) proteins, have been detected and shown to be influenced by hormones (eg, estrogen and progesterone) in uterine and placental tissues in several species. We hypothesized that (1) the messenger RNA (mRNA) for Cx26, Cx32, Cx37, and Cx43 is expressed in the uterus of ovariectomized sheep treated with estradiol-17β (E2) and in ovine placenta during early pregnancy, (2) E2-treatment of ovariectomized ewes would cause time-specific changes in Cx26, Cx32, Cx37, and Cx43 mRNA expression (experiment 1), and (3) expression of these 4 Cx would vary across the days of early pregnancy (experiment 2) and will be affected by embryo origin (ie, after application of assisted reproductive technologies [ARTs]; experiment 3). Thus, we collected uterine tissues at 0 to 24 h after E2 treatments (experiment 1), and placental tissues during days 14 to 30 of early pregnancy after natural (NAT) breeding (experiment 2) and on day 22 of early pregnancy established after transfer of embryos generated through natural breeding (NAT-ET), in vitro fertilization (IVF), or in vitro activation (IVA, parthenotes; experiment 3). In experiment 1, the expression of Cx26, Cx37, and Cx43 mRNA increased (P < 0.05) and Cx32 mRNA decreased (P < 0.06) in both caruncular and intercaruncular tissues after E2 treatment. In experiment 2, during early pregnancy, there were significant changes (P < 0.01) across days in the expression of Cx26, Cx37, and Cx43 mRNA in the maternal placenta, accompanied by changes (P < 0.001) in Cx37 and Cx43 mRNA in the fetal placenta. In experiment 3, in maternal placenta, Cx32 mRNA expression was decreased (P < 0.001) in NAT-ET, IVF, and IVA groups compared to the NAT group; but in fetal placenta, Cx32 mRNA expression was increased (P < 0.05) in NAT-ET, IVF and IVF groups, and Cx26 mRNA expression was increased (P < 0.05) in IVA compared to NAT group. These data suggest that Cx26, Cx32, Cx37, and Cx43 play specific roles in E2-regulated uterine function and in placental development during early gestation both after natural mating and with application of ART.
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Affiliation(s)
- M L Johnson
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - D A Redmer
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - L P Reynolds
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - A T Grazul-Bilska
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA.
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Johnson ML, Bodenhamer-Davis E, Gates MS. Neuromodulation Methods to Suppress Tinnitus in Somatosensory Subtypes: A Case Series. NR 2016. [DOI: 10.15540/nr.3.4.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ross RD, Mashiatulla M, Acerbo AS, Almer JD, Miller LM, Johnson ML, Sumner DR. HBM Mice Have Altered Bone Matrix Composition and Improved Material Toughness. Calcif Tissue Int 2016; 99:384-95. [PMID: 27230741 PMCID: PMC7376697 DOI: 10.1007/s00223-016-0154-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 05/12/2016] [Indexed: 01/22/2023]
Abstract
The G171V mutation in the low-density lipoprotein receptor-related protein 5 (LRP5) leads to a high bone mass (HBM) phenotype. Studies using HBM transgenic mouse models have consistently found increased bone mass and whole-bone strength, but little attention has been paid to the composition of the bone matrix. The current study sought to determine if the cortical bone matrix composition differs in HBM and wild-type mice and to determine how much of the variance in bone material properties is explained by variance in matrix composition. Consistent with previous studies, HBM mice had greater cortical area, moment of inertia, ultimate force, bending stiffness, and energy to failure than wild-type animals. The increased energy to failure was primarily caused by a large increase in post-yield behavior, with no difference in pre-yield behavior. The HBM mice had increased mineral-to-matrix and collagen cross-link ratios, and decreased crystallinity, carbonate, and acid phosphate substitution as measured by Fourier transform infrared microspectroscopy, but no differences in crystal length, intra-fibular strains, and mineral spacing compared to wild-type controls, as measured by X-ray scattering. The largest between genotype difference in material properties was a twofold increase in the modulus of toughness in HBM mice. Step-wise regression analyses showed that the specific matrix compositional parameters most closely associated with material properties varied between the wild-type and HBM genotypes. Although the mechanisms controlling the paradoxical combination of more mineralized yet tougher bone in HBM mice remain to be fully explained, the findings suggest that LRP5 represents a target to not only build bone mass but also to improve bone quality.
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Affiliation(s)
- Ryan D Ross
- Department of Anatomy & Cell Biology, Rush University Medical Center, 600 South Paulina, Suite 507, Chicago, IL, 60612, USA.
| | - Maleeha Mashiatulla
- Department of Anatomy & Cell Biology, Rush University Medical Center, 600 South Paulina, Suite 507, Chicago, IL, 60612, USA
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Alvin S Acerbo
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL, USA
- National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY, USA
| | - Jonathan D Almer
- X-ray Science Division, Argonne National Laboratory, Argonne, IL, USA
| | - Lisa M Miller
- National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY, USA
| | - Mark L Johnson
- Department of Oral Biology, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - D Rick Sumner
- Department of Anatomy & Cell Biology, Rush University Medical Center, 600 South Paulina, Suite 507, Chicago, IL, 60612, USA
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, USA
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Maurel DB, Duan P, Farr J, Cheng AL, Johnson ML, Bonewald LF. Beta-Catenin Haplo Insufficient Male Mice Do Not Lose Bone in Response to Hindlimb Unloading. PLoS One 2016; 11:e0158381. [PMID: 27410430 PMCID: PMC4943721 DOI: 10.1371/journal.pone.0158381] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 06/15/2016] [Indexed: 11/19/2022] Open
Abstract
As the β-catenin pathway has been shown to be involved in mechanotransduction, we sought to determine if haploinsufficiency would affect skeletal response to unloading. It has previously been shown that deletion of both alleles of β-catenin in bone cells results in a fragile skeleton highly susceptible to fracture, but deletion of one allele using Dmp1-Cre (Ctnnb1+/loxP; Dmp1-Cre, cKO HET) has little effect on the 2 mo old skeleton. We found that under normal housing conditions, trabecular bone volume was significantly less in 5 mo old male cKO HET mice compared to controls (Ctrl/HET:Tb. BV/TV = 13.96±2.71/8.92±0.95%, Tb.N. = 4.88±0.51/3.95±0.44/mm, Tb. Sp. = 0.20±0.02/0.26±0.03mm, a 36%, 19% and 30% change respectively) but not in females suggesting an age and gender related effect. Before performing suspension experiments and to control for the environmental effects, animals with the same tail attachment and housing conditions, but not suspended (NS), were compared to normally housed (NH) animals. Attachment and housing resulted in weight loss in both genders and phenotypes. Cortical bone loss was observed in the cKO HET males (NH/NS, Ct BV/TV: 90.45±0.72/89.12±0.56%) and both diaphyseal (0.19±0.01/0.17±0.01mm) and metaphyseal (0.10±0.01/0.08±0.01mm) thickness, but not in female cKO HET mice suggesting that male cKO HET mice are susceptible to attachment and housing conditions. These results with transgenic mice emphasizes the importance of proper controls when attributing skeletal responses to unloading. With suspension, cKO HET male mice did not lose bone unlike female cKO HET mice that had greater trabecular bone loss than controls (Ctrl 9%:cKO HET 21% decrease Tb. N; Ctrl 12%:cKO HET 27% increase Tb. Sp.). Suspended and non-suspended mice lost weight compared to normally housed animals. Taken together, the data suggest a protective effect of β-catenin against the effects of stress in males and partial protection against unloading in females.
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Affiliation(s)
- Delphine B. Maurel
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States of America
| | - Peipei Duan
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States of America
| | - Joshua Farr
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States of America
| | - An-Lin Cheng
- School of Nursing and Health Studies, University of Missouri-Kansas City, Kansas City, MO, United States of America
| | - Mark L. Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States of America
| | - Lynda F. Bonewald
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, United States of America
- * E-mail:
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Mauro NA, Vogt AJ, Derendorf KS, Johnson ML, Rustan GE, Quirinale DG, Kreyssig A, Lokshin KA, Neuefeind JC, An K, Wang XL, Goldman AI, Egami T, Kelton KF. Electrostatic levitation facility optimized for neutron diffraction studies of high temperature liquids at a spallation neutron source. Rev Sci Instrum 2016; 87:013904. [PMID: 26827330 DOI: 10.1063/1.4939194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 12/17/2015] [Indexed: 06/05/2023]
Abstract
Neutron diffraction studies of metallic liquids provide valuable information about inherent topological and chemical ordering on multiple length scales as well as insight into dynamical processes at the level of a few atoms. However, there exist very few facilities in the world that allow such studies to be made of reactive metallic liquids in a containerless environment, and these are designed for use at reactor-based neutron sources. We present an electrostatic levitation facility, NESL (for Neutron ElectroStatic Levitator), which takes advantage of the enhanced capabilities and increased neutron flux available at spallation neutron sources (SNSs). NESL enables high quality elastic and inelastic neutron scattering experiments to be made of reactive metallic and other liquids in the equilibrium and supercooled temperature regime. The apparatus is comprised of a high vacuum chamber, external and internal neutron collimation optics, and a sample exchange mechanism that allows up to 30 samples to be processed between chamber openings. Two heating lasers allow excellent sample temperature homogeneity, even for samples approaching 500 mg, and an automated temperature control system allows isothermal measurements to be conducted for times approaching 2 h in the liquid state, with variations in the average sample temperature of less than 0.5%. To demonstrate the capabilities of the facility for elastic scattering studies of liquids, a high quality total structure factor for Zr64Ni36 measured slightly above the liquidus temperature is presented from experiments conducted on the nanoscale-ordered materials diffractometer (NOMAD) beam line at the SNS after only 30 min of acquisition time for a small sample (∼100 mg).
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Affiliation(s)
- N A Mauro
- Department of Physics, North Central College, Naperville, Illinois 60540, USA
| | - A J Vogt
- Instrument and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - K S Derendorf
- Mechanical Engineering and Materials Science, Washington University, St. Louis, Missouri 63130, USA
| | - M L Johnson
- Department of Physics and Institute of Materials Science and Engineering, Washington University, 1 Brookings Drive, St. Louis, Missouri 63130, USA
| | - G E Rustan
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - D G Quirinale
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - A Kreyssig
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - K A Lokshin
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - J C Neuefeind
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Ke An
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Xun-Li Wang
- Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Ave., Kowloon, Hong Kong
| | - A I Goldman
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - T Egami
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - K F Kelton
- Department of Physics and Institute of Materials Science and Engineering, Washington University, 1 Brookings Drive, St. Louis, Missouri 63130, USA
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Begonia MT, Dallas M, Vizcarra B, Liu Y, Johnson ML, Thiagarajan G. Non-contact strain measurement in the mouse forearm loading model using digital image correlation (DIC). Bone 2015; 81:593-601. [PMID: 26388521 PMCID: PMC4640949 DOI: 10.1016/j.bone.2015.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 08/26/2015] [Accepted: 09/14/2015] [Indexed: 01/17/2023]
Abstract
This study investigates the use of a non-contact method known as digital image correlation (DIC) to measure strains in the mouse forearm during axial compressive loading. A two camera system was adapted to analyze the medial and lateral forearm displacements simultaneously, and the derived DIC strain measurements were compared to strain gage readings from both the ulna and radius. Factors such as region-of-interest (ROI) location, lens magnification, noise, and out-of-plane motion were examined to determine their influence on the DIC strain measurements. We confirmed that our DIC system can differentiate ROI locations since it detected higher average strains in the ulna compared to the radius and detected compressive strains on medial bone surfaces vs. tensile strains on lateral bone surfaces. Interestingly, the DIC method also captured heterogeneity in surface strain fields which are not detectable by strain gage based methods. A separate analysis of the noise intrinsic to the DIC system also revealed that the noise constituted less than 4.5% of all DIC strain measurements. Furthermore, finite element (FE) simulations of the forearm showed that out-of-plane motion was not a significant factor that influenced DIC measurements. Finally, we observed that average DIC strain measurements can be up to 1.5-2 times greater than average strain gage readings on the medial bone surfaces. These findings suggest that strain experienced in the mouse forearm model by loading is better captured through DIC as opposed to strain gages, which as a result of being glued to the bone surface artificially stiffen the bone and lead to an underestimation of the strain response.
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Affiliation(s)
- Mark T Begonia
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA
| | - Mark Dallas
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - Bruno Vizcarra
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA
| | - Ying Liu
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - Mark L Johnson
- University of Missouri-Kansas City, School of Dentistry, Department of Oral and Craniofacial Sciences, Room 3143, 650 E 25th Street, Kansas City, MO 64108, USA
| | - Ganesh Thiagarajan
- University of Missouri-Kansas City, Department of Civil and Mechanical Engineering, 350K Robert H. Flarsheim Hall, 5110 Rockhill Road, Kansas City, MO 64110, USA.
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Li BT, Drilon A, Johnson ML, Hsu M, Sima CS, McGinn C, Sugita H, Kris MG, Azzoli CG. A prospective study of total plasma cell-free DNA as a predictive biomarker for response to systemic therapy in patients with advanced non-small-cell lung cancers. Ann Oncol 2015; 27:154-9. [PMID: 26487589 DOI: 10.1093/annonc/mdv498] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 10/08/2015] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND While previous studies have reported on the prognostic value of total plasma cell-free deoxyribonucleic acid (cfDNA) in lung cancers, few have prospectively evaluated its predictive value for systemic therapy response. PATIENTS AND METHODS We conducted a prospective study to evaluate the association between changes in total cfDNA and radiologic response to systemic therapy in patients with stage IIIB/IV non-small-cell lung cancers (NSCLCs). Paired blood collections for cfDNA and computed tomography (CT) assessments by RECIST v1.0 were performed at baseline and 6-12 weeks after therapy initiation. Total cfDNA levels were measured in plasma using quantitative real-time polymerase chain reaction. Associations between changes in cfDNA and radiologic response, progression-free survival (PFS), and overall survival (OS) were measured using Kruskal-Wallis and Kaplan-Meier estimates. RESULTS A total of 103 patients completed paired cfDNA and CT response assessments. Systemic therapy administered included cytotoxic chemotherapy in 57% (59/103), molecularly targeted therapy in 17% (17/103), and combination therapy in 26% (27/103). Median change in cfDNA from baseline to response assessment did not significantly differ by radiologic response categories of progression of disease, stable disease and partial response (P = 0.10). However, using radiologic response as continuous variable, there was a weak positive correlation between change in radiologic response and change in cfDNA (Spearman's correlation coefficient 0.21, P = 0.03). Baseline cfDNA levels were not associated with PFS [hazard ratio (HR) = 1.06, 95% confidence interval (CI) 0.93-1.20, P = 0.41] or OS (HR = 1.04, 95% CI 0.93-1.17, P = 0.51), neither were changes in cfDNA. CONCLUSIONS In this large prospective study, changes in total cfDNA over time did not significantly predict radiologic response from systemic therapy in patients with advanced NSCLC. Pretreatment levels of total cfDNA were not prognostic of survival. Total cfDNA level is not a highly specific predictive biomarker and future investigations in cfDNA should focus on tumor-specific genomic alterations using expanded capabilities of next-generation sequencing.
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Affiliation(s)
- B T Li
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, and Weill Cornell Medical College, New York, USA Sydney Medical School, University of Sydney, Sydney, Australia
| | - A Drilon
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, and Weill Cornell Medical College, New York, USA
| | - M L Johnson
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, and Weill Cornell Medical College, New York, USA
| | - M Hsu
- Department of Biostatistics, Memorial Sloan Kettering Cancer Center, New York
| | - C S Sima
- Department of Biostatistics, Memorial Sloan Kettering Cancer Center, New York
| | - C McGinn
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, and Weill Cornell Medical College, New York, USA
| | - H Sugita
- Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles
| | - M G Kris
- Thoracic Oncology Service, Division of Solid Tumor Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, and Weill Cornell Medical College, New York, USA
| | - C G Azzoli
- Thoracic Oncology Program, Massachusetts General Hospital Cancer Center, Boston, USA
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Reynolds LP, Haring JS, Johnson ML, Ashley RL, Redmer DA, Borowicz PP, Grazul-Bilska AT. Placental development during early pregnancy in sheep: estrogen and progesterone receptor messenger RNA expression in pregnancies derived from in vivo-produced and in vitro-produced embryos. Domest Anim Endocrinol 2015; 53:60-9. [PMID: 26119037 DOI: 10.1016/j.domaniend.2015.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 04/30/2015] [Accepted: 05/21/2015] [Indexed: 11/20/2022]
Abstract
Sex steroids are important regulators of angiogenesis and growth in reproductive tissues, including the placenta. In experiment (exp.) 1, to examine the expression of a suite of sex steroid receptors throughout early pregnancy, maternal (caruncular [CAR]) and fetal (fetal membranes [FM]) placental tissues were collected on days 14 to 30 after mating and on day 10 after estrus (nonpregnant controls). In exp. 2, to examine the hypothesis that assisted reproductive technology would affect the expression of the same suite of sex steroid receptors, pregnancies were achieved through natural mating (NAT) or transfer of embryos from natural mating (NAT-ET), in vitro fertilization (IVF), or in vitro activation (IVA), and CAR and FM were collected on day 22. In exp. 1, for CAR messenger RNA (mRNA) expression of estrogen receptors (ESR) 1 and 2, nuclear (n) progesterone receptors (PGR) and membrane (m) PGRα, β, and γ were affected (P < 0.02) by pregnancy stage, as were ESR1, nPGR, and mPGRα, β, and γ for FM (P < 0.03). In exp. 2, for CAR, mRNA expression of ESR1 and nPGR was decreased (P < 0.001) in NAT-ET, IVF, and IVA groups compared with NAT. For FM, mRNA expression of ESR1 tended to be greater (P = 0.10) in the IVA group compared with NAT and NAT-ET, and GPER1 was greater (P < 0.05) in NAT-ET and IVF compared with NAT. These data establish the normal pattern of sex steroid receptor mRNA expression in maternal and fetal placenta during early pregnancy in sheep, and in addition, suggest that altered expression of placental sex steroid receptors may be an early event leading to poor placental vascularization and growth after assisted reproductive technology.
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Affiliation(s)
- L P Reynolds
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA; Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA.
| | - J S Haring
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA
| | - M L Johnson
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA; Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - R L Ashley
- Department of Animal and Range Sciences, New Mexico State University, Las Cruces, NM, USA
| | - D A Redmer
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA; Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - P P Borowicz
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA; Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
| | - A T Grazul-Bilska
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA; Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND 58108, USA
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Lara-Castillo N, Kim-Weroha NA, Kamel MA, Javaheri B, Ellies DL, Krumlauf RE, Thiagarajan G, Johnson ML. In vivo mechanical loading rapidly activates β-catenin signaling in osteocytes through a prostaglandin mediated mechanism. Bone 2015; 76:58-66. [PMID: 25836764 PMCID: PMC4447591 DOI: 10.1016/j.bone.2015.03.019] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/27/2015] [Accepted: 03/02/2015] [Indexed: 12/25/2022]
Abstract
The response of the skeleton to loading appears to be mediated through the activation of the Wnt/β-catenin signaling pathway and osteocytes have long been postulated to be the primary mechanosensory cells in bone. To examine the kinetics of the mechanoresponse of bone and cell types involved in vivo, we performed forearm loading of 17-week-old female TOPGAL mice. β-catenin signaling was observed only in embedded osteocytes, not osteoblasts, at 1h post-loading, spreading to additional osteocytes and finally to cells on the bone surface by 24h. This early activation at 1h appeared to be independent of receptor (Lrp5/6) mediated activation as it occurred in the presence of the inhibitors sclerostin and/or Dkk1. The COX-2 inhibitor, Carprofen, blocked the activation of β-catenin signaling and decline in sclerostin positive osteocytes post-loading implying an important role for prostaglandin. In vitro, PI3K/Akt activation was shown to be required for β-catenin nuclear translocation downstream from prostaglandin in MLO-Y4 osteocyte-like cells supporting this mechanism. Downstream targets of β-catenin signaling, sclerostin and Dkk1, were also examined and found to be significantly downregulated in osteocytes in vivo at 24h post-loading. The pattern of initially activated osteocytes appeared random and in order to understand this heterogeneous expression, a novel finite element model of the strain field in the ulna was developed, which predicts highly variable local magnitudes of strain experienced by osteocytes. In summary, both in vivo and in vitro models show the rapid activation of β-catenin in response to load through the early release of prostaglandin and that strain fields in the bone are extremely heterogeneous resulting in heterogeneous activation of the β-catenin pathway in osteocytes in vivo.
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Affiliation(s)
- N Lara-Castillo
- UMKC School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas City, MO 64108, USA
| | - N A Kim-Weroha
- UMKC School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas City, MO 64108, USA
| | - M A Kamel
- UMKC School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas City, MO 64108, USA
| | - B Javaheri
- The Royal Veterinary College, Royal College Street, London, NW1 0TU, UK
| | - D L Ellies
- OsteoGeneX Inc, Kansas City, KS 66103, USA
| | - R E Krumlauf
- UMKC School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas City, MO 64108, USA; Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - G Thiagarajan
- UMKC School of Computing and Engineering, Kansas City, MO 64110, USA
| | - M L Johnson
- UMKC School of Dentistry, Department of Oral and Craniofacial Sciences, Kansas City, MO 64108, USA.
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43
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Abstract
A dozen years ago the identification of causal mutations in the low-density lipoprotein receptor-related protein 5 (LRP5) gene involved in two rare bone disorders propelled research in the bone field in totally new directions. Since then, there have been an explosion in the number of reports that highlight the role of the Wnt/β-catenin pathway in the regulation of bone homeostasis. In this review we discuss some of the most recent reports (in the past 2 years) highlighting the involvement of the members of the LRP family (LRP5, LRP6, LRP4, and more recently LRP8) in the maintenance of bone and their implications in bone diseases. These reports include records of new single nucleotides polymorphisms (SNPs) and haplotypes that suggest variants in these genes can contribute to subtle variation in bone traits to mutations that give rise to extreme bone phenotypes. All of these serve to further support and reinforce the importance of this tightly regulated pathway in bone. Furthermore, we discuss provocative reports suggesting novel approaches through inhibitors of this pathway to treat rarer diseases such as Osteoporosis-Pseudoglioma Syndrome (OPPG), Osteogenesis Imperfecta (OI), and Sclerosteosis/Van Buchem disease. It is hoped that by understanding the role of each component of the pathway and their involvement in bone diseases that this knowledge will allow us to develop new, more effective therapeutic approaches for more common diseases such as post-menopausal osteoporosis, osteoarthritis, and rheumatoid arthritis as well as these rarer bone diseases.
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Affiliation(s)
- N Lara-Castillo
- Department of Oral and Craniofacial Sciences, UMKC School of Dentistry, 650 East 25th Street, Kansas City, MO, 64108, USA,
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Johnson ML. Echocardiographic evaluation of left ventricular size and function and function and its application in coronary artery disese. Adv Cardiol 2015; 17:105-22. [PMID: 1274774 DOI: 10.1159/000398832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Affiliation(s)
- Mark L Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City (UMKC), Kansas City, MO, USA
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46
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Xu H, Gu S, Riquelme MA, Burra S, Callaway D, Cheng H, Guda T, Schmitz J, Fajardo RJ, Werner SL, Zhao H, Shang P, Johnson ML, Bonewald LF, Jiang JX. Connexin 43 channels are essential for normal bone structure and osteocyte viability. J Bone Miner Res 2015; 30:436-48. [PMID: 25270829 PMCID: PMC4333056 DOI: 10.1002/jbmr.2374] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/28/2014] [Accepted: 10/01/2014] [Indexed: 11/10/2022]
Abstract
Connexin (Cx) 43 serves important roles in bone function and development. Targeted deletion of Cx43 in osteoblasts or osteocytes leads to increased osteocyte apoptosis, osteoclast recruitment, and reduced biomechanical properties. Cx43 forms both gap junction channels and hemichannels, which mediate the communication between adjacent cells or between cell and extracellular environments, respectively. Two transgenic mouse models driven by a DMP1 promoter with the overexpression of dominant negative Cx43 mutants were generated to dissect the functional contribution of Cx43 gap junction channels and hemichannels in osteocytes. The R76W mutant blocks the gap junction channel, but not the hemichannel function, and the Δ130-136 mutant inhibits activity of both types of channels. Δ130-136 mice showed a significant increase in bone mineral density compared to wild-type (WT) and R76W mice. Micro-computed tomography (µCT) analyses revealed a significant increase in total tissue and bone area in midshaft cortical bone of Δ130-136 mice. The bone marrow cavity was expanded, whereas the cortical thickness was increased and associated with increased bone formation along the periosteal area. However, there is no significant alteration in the structure of trabecular bone. Histologic sections of the midshaft showed increased apoptotic osteocytes in Δ130-136, but not in WT and R76W, mice which correlated with altered biomechanical and estimated bone material properties. Osteoclasts were increased along the endocortical surface in both transgenic mice with a greater effect in Δ130-136 mice that likely contributed to the increased marrow cavity. Interestingly, the overall expression of serum bone formation and resorption markers were higher in R76W mice. These findings suggest that osteocytic Cx43 channels play distinctive roles in the bone; hemichannels play a dominant role in regulating osteocyte survival, endocortical bone resorption, and periosteal apposition, and gap junction communication is involved in the process of bone remodeling.
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Affiliation(s)
- Huiyun Xu
- School of Life Sciences, Northwestern Polytechnical University, Xian, China; Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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47
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Thiagarajan G, Lu Y, Dallas M, Johnson ML. Experimental and finite element analysis of dynamic loading of the mouse forearm. J Orthop Res 2014; 32:1580-8. [PMID: 25196694 PMCID: PMC4356248 DOI: 10.1002/jor.22720] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 07/22/2014] [Indexed: 02/04/2023]
Abstract
Bone formation is reported to initiate in osteocytes by mechanotransduction due to dynamic loading of bone. The first step towards this is to characterize the dynamic strain fields in the overall bone. Here, the previously developed mouse forearm ulna-radius model, subjected to static loading, has been further enhanced by incorporating a loading cap and applying a cyclic dynamic load to more closely approximate experimental biological conditions. This study also incorporates data obtained from strain gauging both the ulna and radius simultaneously. Based on separate experiments, the elastic modulus of the ulna and radius were determined to be 13.8 and 9.9 GPa, respectively. Another novel aspect of the numerical model is the inclusion of the interosseous membrane in the FE model with membrane stiffness ranging from 5-15 N/mm that have been found to give strain values closer to that from the experiments. Interestingly, the inclusion of the interosseous membrane helped to equalize the peak strain magnitudes in the ulna and radius (∼1800 at 2 N load and ∼3200 at 3.5 N), which was also observed experimentally. This model represents a significant advance towards being able to simulate through FE analysis the strain fields generated in vivo upon mechanical loading of the mouse forearm.
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Affiliation(s)
- Ganesh Thiagarajan
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350L Flarsheim Hall, 5100 Rockhill Road, Kansas City, Missouri 64110
| | - Yunkai Lu
- Department of Civil and Mechanical Engineering, University of Missouri-Kansas City, 350L Flarsheim Hall, 5100 Rockhill Road, Kansas City, Missouri 64110
| | - Mark Dallas
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, Missouri 64108
| | - Mark L. Johnson
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Room 3143, 650 E 25th Street, Kansas City, Missouri 64108
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Kitase Y, Lee S, Gluhak-Heinrich J, Johnson ML, Harris SE, Bonewald LF. CCL7 is a protective factor secreted by mechanically loaded osteocytes. J Dent Res 2014; 93:1108-15. [PMID: 25274752 DOI: 10.1177/0022034514553008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
In a search for factors up-regulated by mechanical strain in osteocytes, we discovered that chemokine (C-C motif) ligand 7 (CCL7), a chemotactic myokine, was highly expressed in MLO-Y4 osteocyte-like cells. Although MLO-Y4 cells secrete potent chemotactic factors for osteoclast precursors, CCL7 was not responsible for this activity. CCL7 was increased in osteocytes in response to tooth movement in vivo. Since mechanical loading plays a crucial role in maintaining osteocyte viability, CCL7 was tested for protective activity and found to be protective against cell death induced by dexamethasone and etoposide. CCL7 specific antibody partially, but in combination with indomethacin, completely abrogated the protective effects of fluid flow shear stress against dexamethasone-induced cell death. CCL7 activated the β-catenin pathway through phosphorylation of glycogen synthase kinase 3 (GSK-3), suggesting that this pathway is responsible for the observed protective effects. A related cytokine, CCL2, also produced by MLO-Y4 cells but not regulated by mechanical loading, proved to be more potent and protected against cell death induced by not only dexamethasone, but also by Tumor Necrosis Factor α (TNFα). Whereas osteocytes may produce CCL2 in constitutively low levels, a major function of mechanically induced CCL7 may be to selectively protect osteocytes in an autocrine manner against glucocorticoid-induced cell death.
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Affiliation(s)
- Y Kitase
- Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - S Lee
- Endocrinology, Internal Medicine, Eulji University School of Medicine, Daejeon City, Republic of Korea
| | | | - M L Johnson
- Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - S E Harris
- Periodontics and Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - L F Bonewald
- Oral and Craniofacial Sciences, School of Dentistry, University of Missouri-Kansas City, Kansas City, MO, USA
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Srivastava T, Alon US, Cudmore PA, Tarakji B, Kats A, Garola RE, Duncan RS, McCarthy ET, Sharma R, Johnson ML, Bonewald LF, El-Meanawy A, Savin VJ, Sharma M. Cyclooxygenase-2, prostaglandin E2, and prostanoid receptor EP2 in fluid flow shear stress-mediated injury in the solitary kidney. Am J Physiol Renal Physiol 2014; 307:F1323-33. [PMID: 25234310 DOI: 10.1152/ajprenal.00335.2014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Hyperfiltration subjects podocytes to increased tensile stress and fluid flow shear stress (FFSS). We showed a 1.5- to 2.0-fold increase in FFSS in uninephrectomized animals and altered podocyte actin cytoskeleton and increased synthesis of prostaglandin E2 (PGE2) following in vitro application of FFSS. We hypothesized that increased FFSS mediates cellular changes through specific receptors of PGE2. Presently, we studied the effect of FFSS on cultured podocytes and decapsulated isolated glomeruli in vitro, and on solitary kidney in uninephrectomized sv129 mice. In cultured podocytes, FFSS resulted in increased gene and protein expression of cyclooxygenase (COX)-2 but not COX-1, prostanoid receptor EP2 but not EP4, and increased synthesis and secretion of PGE2, which were effectively blocked by indomethacin. Next, we developed a special flow chamber for applying FFSS to isolated glomeruli to determine its effect on an intact glomerular filtration barrier by measuring change in albumin permeability (Palb) in vitro. FFSS caused an increase in Palb that was blocked by indomethacin (P < 0.001). Finally, we show that unilateral nephrectomy in sv129 mice resulted in glomerular hypertrophy (P = 0.006), increased glomerular expression of COX-2 (P < 0.001) and EP2 (P = 0.039), and increased urinary albumin excretion (P = 0.001). Activation of the COX-2-PGE2-EP2 axis appears to be a specific response to FFSS in podocytes and provides a mechanistic basis for alteration in podocyte structure and the glomerular filtration barrier, leading to albuminuria in hyperfiltration-mediated kidney injury. The COX-2-PGE2-EP2 axis is a potential target for developing specific interventions to ameliorate the effects of hyperfiltration-mediated kidney injury in the progression of chronic kidney disease.
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Affiliation(s)
- Tarak Srivastava
- Section of Nephrology, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri; Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri;
| | - Uri S Alon
- Section of Nephrology, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - Patricia A Cudmore
- Section of Nephrology, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - Belal Tarakji
- Section of Nephrology, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - Alexander Kats
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - Robert E Garola
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - R Scott Duncan
- Section of Infectious Diseases, Children's Mercy Hospital and University of Missouri-Kansas City, Kansas City, Missouri
| | - Ellen T McCarthy
- Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas
| | - Ram Sharma
- Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Mark L Johnson
- Department of Oral Biology, University of Missouri-Kansas City School of Dentistry, Kansas City, Missouri; and
| | - Lynda F Bonewald
- Department of Oral Biology, University of Missouri-Kansas City School of Dentistry, Kansas City, Missouri; and
| | - Ashraf El-Meanawy
- Division of Nephrology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Virginia J Savin
- Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas; Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
| | - Mukut Sharma
- Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas; Renal Research Laboratory, Research and Development, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri
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50
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Abstract
The musculoskeletal system is a complex organ comprised of the skeletal bones, skeletal muscles, tendons, ligaments, cartilage, joints, and other connective tissue that physically and mechanically interact to provide animals and humans with the essential ability of locomotion. This mechanical interaction is undoubtedly essential for much of the diverse shape and forms observed in vertebrates and even in invertebrates with rudimentary musculoskeletal systems such as fish. It makes sense from a historical point of view that the mechanical theories of musculoskeletal development have had tremendous influence of our understanding of biology, because these relationships are clear and palpable. Less visible to the naked eye or even to the microscope is the biochemical interaction among the individual players of the musculoskeletal system. It was only in recent years that we have begun to appreciate that beyond this mechanical coupling of muscle and bones, these 2 tissues function at a higher level through crosstalk signaling mechanisms that are important for the function of the concomitant tissue. Our brief review attempts to present some of the key concepts of these new concepts and is outline to present muscles and bones as secretory/endocrine organs, the evidence for mutual genetic and tissue interactions, pathophysiological examples of crosstalk, and the exciting new directions for this promising field of research aimed at understanding the biochemical/molecular coupling of these 2 intimately associated tissues.
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Affiliation(s)
- Marco Brotto
- Muscle Biology Research Group-MUBIG, UMKC School of Nursing & Health Studies and School of Medicine, 2464 Charlotte Street, Kansas City, MO, 64108, USA,
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