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Eckstein F, Maschek S, Culvenor A, Sharma L, Roemer F, Duda G, Wirth W. Which risk factors determine cartilage thickness and composition change in radiographically normal knees? - Data from the Osteoarthritis Initiative. Osteoarthr Cartil Open 2023; 5:100365. [PMID: 37207279 PMCID: PMC10188628 DOI: 10.1016/j.ocarto.2023.100365] [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: 01/26/2023] [Accepted: 04/24/2023] [Indexed: 05/21/2023] Open
Abstract
Objective Therapy for osteoarthritis ideally aims at preserving structure before radiographic change occurs. This study tests: a) whether longitudinal deterioration in cartilage thickness and composition (transverse relaxation-time T2) are greater in radiographically normal knees "at risk" of incident osteoarthritis than in those without risk factors; and b) which risk factors may be associated with these deteriorations. Design 755 knees from the Osteoarthritis Initiative were studied; all were bilaterally Kellgren Lawrence grade [KLG] 0 initially, and had magnetic resonance images available at 12- and 48-month follow-up. 678 knees were "at risk", whereas 77 were not (i.e., non-exposed reference). Cartilage thickness and composition change was determined in 16 femorotibial subregions, with deep and superficial T2 being analyzed in a subset (n = 59/52). Subregion values were used to compute location-independent change scores. Results In KLG0 knees "at risk", the femorotibial cartilage thinning score (-634 ± 516 μm) over 3 years exceeded the thickening score by approximately 20%, and was 27% greater (p < 0.01; Cohen D -0.27) than the thinning score in "non-exposed" knees (-501 ± 319 μm). Superficial and deep cartilage T2 change, however, did not differ significantly between both groups (p ≥ 0.38). Age, sex, body mass index, knee trauma/surgery history, family history of joint replacement, presence of Heberden's nodes, repetitive knee bending were not significantly associated with cartilage thinning (r2<1%), with only knee pain reaching statistical significance. Conclusions Knees "at risk" of incident knee OA displayed greater cartilage thinning scores than those "non-exposed". Except for knee pain, the greater cartilage loss was not significantly associated with demographic or clinical risk factors.
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Affiliation(s)
- F. Eckstein
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy and Cell Biology & Ludwig Boltzmann Intitute of Arthritis & Rehabilitation (LBIAR), Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- Chondrometrics GmbH, Ainring, Germany
- Corresponding author. Institute of Anatomy & Cell Biology, Paracelsus Medical University, Strubergasse 21, A-5020 Salzburg, Austria.
| | - S. Maschek
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy and Cell Biology & Ludwig Boltzmann Intitute of Arthritis & Rehabilitation (LBIAR), Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- Chondrometrics GmbH, Ainring, Germany
| | - A. Culvenor
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy and Cell Biology & Ludwig Boltzmann Intitute of Arthritis & Rehabilitation (LBIAR), Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health La Trobe University, Bundoora, Australia
| | - L. Sharma
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago IL, USA
| | - F.W. Roemer
- Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg & Universitätsklinikum Erlangen, Erlangen, Germany
- Department of Radiology, Boston University School of Medicine, Boston, MA, USA
| | - G.N. Duda
- Julius Wolff Institute, Berlin-Brandenburg Institute of Health at Charité – Universitätsmedizin Berlin, Germany
| | - W. Wirth
- Department of Imaging and Functional Musculoskeletal Research, Institute of Anatomy and Cell Biology & Ludwig Boltzmann Intitute of Arthritis & Rehabilitation (LBIAR), Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria
- Chondrometrics GmbH, Ainring, Germany
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Swaroop S, Sharma L. Employee engagement in the era of remote workforce: role of human resource managers. CM 2022. [DOI: 10.18137/cardiometry.2022.23.619628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The study aims to find the different roles of Human Resource Managers on employee engagement in the era of the remote workforce. With many companies undergoing a digital transformation, the number of employees working remotely across different industries increases. Based on the roles defined by Dave Ulrich Model, the study has developed a framework to determine the HR role – employee engagement relationship. The data has been obtained from the primary source – questionnaire and secondary sources – existing research papers for the literature review. For data analysis, this study has used SPSS software. The results revealed that the various roles of HR Managers under have a significant impact on the practices for remote employee engagement. There were three roles of HR Managers (Employee Champion, Change Agent, and Strategic Partner) with seven variables considered; for employee engagement, five variables were considered for the study. All the variables of HR Roles were found to have a statistical relationship with the different employee engagement parameters for the remote workforce. Thus, indicating that HR Managers have a role in employee engagement. The scope and limitations of the study have also been stated.
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Rajput AS, Balai HK, Bairwa KC, Sharma L. Labour Absorption in Livestock Activities in Transitional Plain Region of Rajasthan. Journal of Livestock Science 2021. [DOI: 10.33259/jlivestsci.2021.292-297] [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: 11/11/2022]
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Raman A, Nasrazadani S, Sharma L, Razvan A. Morphology of Rust Phases Formed on Weathering Steels during Outdoor Atmospheric Exposure in Sheltered Locations under the Bridges / Morphologie der auf „Weathering“-Stählen unter atmosphärischen Bedingungen an geschützten Standorten unter Brücken gebildeten Rostphasen. ACTA ACUST UNITED AC 2021. [DOI: 10.1515/pm-1987-241105] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sharma L, Faour A, Nguyen T, Burgess S, Juergens C, French J. Simple Indices of Infarct Size Post ST-Elevation Myocardial Infarction (STEMI) Provides Similar Risk Stratification to Cardiac MRI. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.330] [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: 11/16/2022]
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Smith RY, Morgan D, Sharma L, Cherny VV, Tidswell N, Molo MW, DeCoursey TE. Voltage-gated proton channels exist in the plasma membrane of human oocytes. Hum Reprod 2020; 34:1974-1983. [PMID: 31633762 DOI: 10.1093/humrep/dez178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/15/2019] [Revised: 07/10/2019] [Indexed: 12/25/2022] Open
Abstract
STUDY QUESTION Do human oocytes express voltage-gated proton channels? SUMMARY ANSWER Human oocytes exhibit voltage-gated proton currents. WHAT IS KNOWN ALREADY Voltage-gated proton currents have been reported in human sperm, where they contribute to capacitation and motility. No such studies of human oocytes exist. STUDY DESIGN, SIZE, DURATION Voltage-clamp studies were undertaken using entire oocytes and vesicles derived from oocytes and in excised patches of membrane from oocytes. PARTICIPANTS/MATERIALS, SETTING, METHODS Frozen, thawed human metaphase II oocytes were obtained from material donated to the gamete repository at the Rush Center for Advanced Reproductive Care. Prior to patch clamping, oocytes were warmed and equilibrated. Formation of an electrically tight seal requires exposing bare oolemma. Sections of the zona pellucida (ZP) were removed using a laser, followed by repeated pipetting, to further separate the oocyte from the ZP. Patch-clamp studies were performed using the whole-cell configuration on oocytes or vesicles derived from oocytes, and using inside-out patches of membrane, under conditions optimized to detect voltage-gated proton currents. MAIN RESULTS AND THE ROLE OF CHANCE Proton currents are present at significant levels in human oocytes where they exhibit properties similar to those reported in other human cells, as well as those in heterologous expression systems transfected with the HVCN1 gene that codes for the voltage-gated proton channel. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Human oocytes are large cells, which limits our ability to control the intracellular solution. Subtle effects of cryopreservation by vitrification and subsequent warming on properties of HVCN1, the HVCN1 gene product, cannot be ruled out. WIDER IMPLICATIONS OF THE FINDINGS Possible functions for voltage-gated proton channels in human oocytes may now be contemplated. STUDY FUNDING/COMPETING INTEREST(S) NIH R35GM126902 (TED), Bears Care (DM). No competing interests. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- R Ya Smith
- Rush Center for Advanced Reproductive Care, Department of Obstetrics and Gynecology, Rush University Medical Center, Chicago, IL 60612, USA
| | - D Morgan
- Department of Physiology & Biophysics, Rush University, Chicago, IL 60612, USA
| | - L Sharma
- Rush Center for Advanced Reproductive Care, Department of Obstetrics and Gynecology, Rush University Medical Center, Chicago, IL 60612, USA
| | - V V Cherny
- Department of Physiology & Biophysics, Rush University, Chicago, IL 60612, USA
| | - N Tidswell
- Rush Center for Advanced Reproductive Care, Department of Obstetrics and Gynecology, Rush University Medical Center, Chicago, IL 60612, USA
| | - M W Molo
- Rush Center for Advanced Reproductive Care, Department of Obstetrics and Gynecology, Rush University Medical Center, Chicago, IL 60612, USA
| | - T E DeCoursey
- Department of Physiology & Biophysics, Rush University, Chicago, IL 60612, USA
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Grzymski JJ, Elhanan G, Morales Rosado JA, Smith E, Schlauch KA, Read R, Rowan C, Slotnick N, Dabe S, Metcalf WJ, Lipp B, Reed H, Sharma L, Levin E, Kao J, Rashkin M, Bowes J, Dunaway K, Slonim A, Washington N, Ferber M, Bolze A, Lu JT. Population genetic screening efficiently identifies carriers of autosomal dominant diseases. Nat Med 2020; 26:1235-1239. [DOI: 10.1038/s41591-020-0982-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 06/12/2020] [Indexed: 01/10/2023]
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Ghomrawi H, Mushlin A, Kang R, Banerjee S, Singh J, Sharma L, Flink C, Nevitt M, Neogi T, Riddle D. Examining Timeliness of Total Knee Replacement Among Patients with Knee Osteoarthritis in the U.S.: Results from the OAI and MOST Longitudinal Cohorts. J Bone Joint Surg Am 2020; 102:468-476. [PMID: 31934894 PMCID: PMC7508265 DOI: 10.2106/jbjs.19.00432] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Patients with knee osteoarthritis may undergo total knee replacement too early or may delay or underuse this procedure. We quantified these categories of total knee replacement utilization in 2 cohorts of participants with knee osteoarthritis and investigated factors associated with each category. METHODS Data were pooled from 2 multicenter cohort studies that collected demographic, patient-reported, radiographic, clinical examination, and total knee replacement utilization information longitudinally on 8,002 participants who had or were at risk for knee osteoarthritis and were followed for up to 8 years. Validated total knee replacement appropriateness criteria were longitudinally applied to classify participants as either potentially appropriate or likely inappropriate for total knee replacement. Participants were further classified on the basis of total knee replacement utilization into 3 categories: timely (indicating that the patient had total knee replacement within 2 years after the procedure had become potentially appropriate), potentially appropriate but knee not replaced (indicating that the knee had remained unreplaced for >2 years after the procedure had become potentially appropriate), and premature (indicating that the procedure was likely inappropriate but had been performed). Utilization rates were calculated, and factors associated with each category were identified. RESULTS Among 8,002 participants, 3,417 knees fulfilled our inclusion and exclusion criteria and were classified into 1 of 3 utilization categories as follows: 290 knees (8% of the total and 9% of the knees for which replacement was potentially appropriate) were classified as "timely", 2,833 knees (83% of the total and 91% of those for which replacement was potentially appropriate) were classified as "potentially appropriate but not replaced", and 294 knees (comprising 9% of the total and 26% of the 1,114 total knee replacements performed) were considered to be "likely inappropriate" yet underwent total knee replacement and were classified as "premature". Of the knees that were potentially appropriate but were not replaced, 1,204 (42.5%) had severe symptoms. Compared with the patients who underwent timely total knee replacement, the likelihood of being classified as potentially appropriate but not undergoing total knee replacement was greater for black participants and the likelihood of having premature total knee replacement was lower among participants with a body mass index of >25 kg/m and those with depression. CONCLUSIONS In 2 multicenter cohorts of patients with knee osteoarthritis, we observed substantial numbers of patients who had premature total knee replacement as well as of patients for whom total knee replacement was potentially appropriate but had not been performed >2 years after it had become potentially appropriate. Further understanding of these observations is needed, especially among the latter group. CLINICAL RELEVANCE Undergoing total knee replacement too early may result in little or no benefit while exposing the patient to the risks of a major operation, whereas waiting too long may cause limitations in physical activity that in turn increase the risk of additional disability and chronic disease; however, little is known about timing of this surgery. We quantified the extent of premature, timely, and delayed use, and found a high prevalence of both premature and delayed use.
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Affiliation(s)
- H.M.K. Ghomrawi
- Departments of Surgery (H.M.K.G.), Pediatrics (H.M.K.G.), and Medicine (L.S.), Center for Health Services and Outcomes Research (H.M.K.G. and R.K.), Feinberg School of Medicine of Northwestern University, Chicago, Illinois,Email address for H.M.K. Ghomrawi:
| | - A.I. Mushlin
- Department of Healthcare Policy and Research, Weill Cornell Medical College, New York, NY
| | - R. Kang
- Departments of Surgery (H.M.K.G.), Pediatrics (H.M.K.G.), and Medicine (L.S.), Center for Health Services and Outcomes Research (H.M.K.G. and R.K.), Feinberg School of Medicine of Northwestern University, Chicago, Illinois
| | - S. Banerjee
- Department of Healthcare Policy and Research, Weill Cornell Medical College, New York, NY
| | - J.A. Singh
- Department of Medicine, University of Alabama at Birmingham and Birmingham VA Medical Center, Birmingham, Alabama
| | - L. Sharma
- Departments of Surgery (H.M.K.G.), Pediatrics (H.M.K.G.), and Medicine (L.S.), Center for Health Services and Outcomes Research (H.M.K.G. and R.K.), Feinberg School of Medicine of Northwestern University, Chicago, Illinois
| | - C. Flink
- Department of Radiology, University of Cincinnati Medical Center, Cincinnati, Ohio
| | - M. Nevitt
- Medical School, University of California, San Francisco, San Francisco, California
| | - T. Neogi
- Clinical Epidemiology Unit, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
| | - D.L. Riddle
- Departments of Physical Therapy, Orthopedics, and Rheumatology, Virginia Commonwealth University, Richmond, Virginia
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9
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Wirth W, Maschek S, Roemer F, Sharma L, Duda GN, Eckstein F. Radiographically normal knees with contralateral joint space narrowing display greater change in cartilage transverse relaxation time than those with normal contralateral knees: a model of early OA? - data from the Osteoarthritis Initiative (OAI). Osteoarthritis Cartilage 2019; 27:1663-1668. [PMID: 31301430 PMCID: PMC6803071 DOI: 10.1016/j.joca.2019.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 02/04/2019] [Revised: 05/28/2019] [Accepted: 06/21/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To develop a model of early osteoarthritis, by examining whether radiographically normal knees with contralateral joint space narrowing (JSN), but without contralateral trauma history, display greater longitudinal cartilage composition change (transverse relaxation time; T2) than subjects with bilaterally normal knees. METHODS 120 radiographically normal knees (Kellgren Lawrence grade [KLG] 0) from the Osteoarthritis Initiative were studied. 60 case knees displayed definite contralateral radiographic knee osteoarthritis (KLG ≥ 2) whereas 60 reference subjects were bilaterally KLG0, and were matched 1:1 to cases based on age, sex, and BMI. All had multi-echo spin-echo MRI acquired at year (Y) 1 and 4 follow-up, with cartilage T2 being determined in superficial and deep cartilage layers across 16 femorotibial subregions. T2 across all regions was considered the primary analytic focus. RESULTS Of 60 KLG0 case knees (30 female, age: 65.0 ± 8.8 y, BMI: 27.6 ± 4.4 kg/m2), 21/22/13/4 displayed contralateral JSN 0/1/2/3, respectively. The longitudinal increase in the deep layer cartilage T2 between Y1 and Y4 was significantly greater (P = 0.03; Cohen's D 0.50) in the 39 KLG0 case knees with contralateral JSN (1.2 ms; 95% confidence interval [CI] [0.4, 2.0]) than in matched KLG0 reference knees (0.1 ms; 95% CI [-0.5, 0.7]). No significant differences were identified in superficial T2 change. T2 at Y1 was significantly greater in case than in reference knees, particularly in the superficial layer of the medial compartment. CONCLUSIONS Radiographically normal knees with contralateral, non-traumatic JSN represent an applicable model of early osteoarthritis, with deep layer cartilage composition (T2) changing more rapidly than in bilaterally normal knees. CLINICALTRIALS. GOV IDENTIFICATION NCT00080171.
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Affiliation(s)
- W. Wirth
- Institute of Anatomy, Paracelsus Medical University
Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
| | - S. Maschek
- Institute of Anatomy, Paracelsus Medical University
Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
| | - F.W. Roemer
- Chondrometrics GmbH, Ainring, Germany,Department of Radiology, University of Erlangen-Nuremberg,
Erlangen, Germany,Department of Radiology, Boston University School of
Medicine, Boston, MA
| | - L. Sharma
- Department of Medicine, Northwestern University Feinberg
School of Medicine, Chicago IL
| | - G. N. Duda
- Julius Wolff Institute and Berlin-Brandenburg Center for
Regenerative Therapies, Charite - Universitätsmedizin Berlin, Germany
| | - F Eckstein
- Institute of Anatomy, Paracelsus Medical University
Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
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Eckstein F, Maschek S, Roemer F, Duda GN, Sharma L, Wirth W. Cartilage loss in radiographically normal knees depends on radiographic status of the contralateral knee - data from the Osteoarthritis Initiative. Osteoarthritis Cartilage 2019; 27:273-277. [PMID: 30394330 PMCID: PMC7246303 DOI: 10.1016/j.joca.2018.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 01/22/2018] [Revised: 10/03/2018] [Accepted: 10/17/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To test whether radiographically normal knees with contralateral radiographic knee osteoarthritis (OA), but without contralateral trauma history, display greater cartilage thickness loss than knees from subjects with bilaterally radiographically normal knees. METHODS 828 radiographically normal knees (Kellgren Lawrence grade [KLG] 0) from the Osteoarthritis Initiative [OAI] were studied; 150 case knees displayed definite radiographic knee OA (KLG ≥ 2) contralaterally, and had MRI double echo steady state (DESS) images available at 12 and 48 month follow-up. 678 reference knees displayed KLG0 at the contralateral side. Cartilage thickness change was determined in femorotibial subregions and location-independent cartilage thinning scores were computed. Case and reference knees were compared using ANCOVA. RESULTS Of the 150 KLG0 case knees, 108 had a contralateral KLG2 knee (50 without, and 58 with joint space narrowing [JSN]), 31 a KLG3 and 11 a KLG4 knee. The cartilage thinning score tended to be greater in case than reference knees; the cartilage thinning score in KLG0 case knees with contralateral radiographic JSN (-858 μm; [95% confidence interval -1016, -701 μm]) was significantly greater (P = 0.0012) than that in bilaterally KLG0 reference knees (-634 μm; [-673, -596 μm]), whereas KLG0 knees with contralateral KLG2 without JSN only showed relatively small thinning scores (-530 μm, [-631, -428 μm]). Region-specific analysis suggested greater rates of cartilage loss in case than in reference knees in the lateral, rather than medial, femorotibial compartment. CONCLUSIONS Radiographically normal knees with contralateral JSN may serve as a human model of early OA, for testing disease modifying drugs in clinical trials designed to prevent cartilage loss before the onset of radiographic change. CLINICALTRIALS. GOV IDENTIFICATION NCT00080171.
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Affiliation(s)
- F Eckstein
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
| | - S. Maschek
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
| | - F.W. Roemer
- Chondrometrics GmbH, Ainring, Germany,Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany,Department of Radiology, Boston University School of Medicine, Boston, MA
| | - G. N. Duda
- Julius Wolff Institute and Berlin-Brandenburg Center for Regenerative Therapies, Charite - Universitätsmedizin Berlin, Germany
| | - L. Sharma
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago IL
| | - W. Wirth
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria,Chondrometrics GmbH, Ainring, Germany
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Nayyar D, Kumarasinghe G, Irwin S, Sharma L, Premawardhana U, Rajaratnam R, Kadappu K. Five-Year Outcome Data from the Budyari Cardiology Outreach Program. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.517] [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: 10/26/2022]
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Sharma L, Faour A, Nguyen T, Holmes L, Gibbs O, Dimitri H, Juergens C, Richards D, Thomas L, French J. Simple Indices of Infarct Size Post ST-Elevation Myocardial Infarction (STEMI) Provides Similar Risk Stratification to Cardiac MRI. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.433] [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: 11/26/2022]
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13
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Femia G, Assas J, Sharma L, Idris H, Gibbs O, Hopkins A, Rajaratnam R, Juergens C, Mussap C, French J, Lo S. Prognostic Impact of Proximal versus Distal Dominant Right Coronary Artery (RCA) Myocardial Infarction. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.677] [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: 10/26/2022]
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Regan C, Sharma L, Villers KS. ORGANIZING SENIORS TO PROTECT THE HEALTH SAFETY NET: THE WAY FORWARD. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1301] [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: 11/14/2022] Open
Affiliation(s)
- C Regan
- Community Catalyst, Boston, Massachusetts, United States
| | - L Sharma
- Community Catalyst, Boston, MA, USA
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Femia G, Gibbs O, Assad J, Sharma L, Hopkins A, Rajaratnam R, Juergens C, Mussap C, Lo S. Prognostic Impact of Proximal Versus Distal Dominant Right Coronary Artery Myocardial Infarction. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.975] [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: 11/28/2022]
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Wirth W, Hunter DJ, Nevitt MC, Sharma L, Kwoh CK, Ladel C, Eckstein F. Predictive and concurrent validity of cartilage thickness change as a marker of knee osteoarthritis progression: data from the Osteoarthritis Initiative. Osteoarthritis Cartilage 2017; 25:2063-2071. [PMID: 28838858 PMCID: PMC5688009 DOI: 10.1016/j.joca.2017.08.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the predictive and concurrent validity of magnetic resonance imaging (MRI)-based cartilage thickness change between baseline (BL) and year-two (Y2) follow-up (predictive validity) and between Y2 and Y4 follow-up (concurrent validity) for symptomatic and radiographic knee osteoarthritis (OA) progression during Y2→Y4. METHODS 777 knees from 777 Osteoarthritis Initiative (OAI) participants (age: 61.3 ± 9.0 years, BMI: 30.1 ± 4.8 kg/m2) with Kellgren Lawrence (KL) grade 1-3 at Y2 (visit before progression interval) had cartilage thickness measurements from 3T MRI at BL, Y2 (n = 777), and Y4 (n = 708). Analysis of covariance and logistic regression were used to assess the association of pain progression (≥9 WOMAC units [scale 0-100], n = 205/572 with/without progression) and radiographic progression (≥0.7 mm minimum joint space width (mJSW) loss, n = 166/611 with/without progression) between Y2 and Y4 with preceding (BL→Y2) and concurrent (Y2→Y4) change in central medial femorotibial (cMFTC) compartment cartilage thickness. RESULTS Symptomatic progression was associated with concurrent (Y2→Y4: -305 ± 470 μm vs -155 ± 346 μm, Odds ratios (OR) = 1.5 [1.2, 1.7]) but not with preceding cartilage thickness loss in cMFTC (-150 ± 276 μm vs -151 ± 299 μm, OR = 0.9 95% CI: [0.8, 1.1]). Radiographic progression, in contrast, was significantly associated with both concurrent (-542 ± 550 μm vs -98 ± 255 μm, OR = 3.4 [2.6, 4.3]) and preceding cMFTC thickness loss (-229 ± 355 μm vs -130 ± 270 μm, OR = 1.3 [1.1, 1.5]). CONCLUSIONS These results extend previous reports that did not discern predictive vs concurrent associations of cartilage thickness loss with OA progression. The observed predictive and concurrent validity of cartilage thickness loss for radiographic progression and observed concurrent validity for symptomatic progression provide an important step in qualifying cartilage thickness loss as a biomarker of knee OA progression. CLINICALTRIALS. GOV IDENTIFICATION NCT00080171.
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Affiliation(s)
- W Wirth
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria & Chondrometrics GmbH, Ainring, Germany.
| | - D J Hunter
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - M C Nevitt
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
| | - L Sharma
- Northwestern University, Chicago IL, USA
| | - C K Kwoh
- Division of Rheumatology, University of Arizona Arthritis Center, University of Arizona, Tucson, AZ, USA
| | - C Ladel
- Merck KGaA, Darmstadt, Germany
| | - F Eckstein
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Salzburg, Austria & Chondrometrics GmbH, Ainring, Germany
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Negi K, Kumar R, Sharma L, Datta SP, Choudhury M, Kumar P. Serum zinc, copper and iron status of children with coeliac disease on three months of gluten-free diet with or without four weeks of zinc supplements: a randomised controlled trial. Trop Doct 2017; 48:112-116. [PMID: 29141505 DOI: 10.1177/0049475517740312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/17/2022]
Abstract
Data about the effect of zinc supplementation with gluten-free diet on normalisation of plasma zinc, copper and iron in patients with coeliac disease are scanty. We evaluated the effect of zinc supplementation on serum zinc, copper and iron levels in patients with coeliac disease, by randomising 71 children newly diagnosed with coeliac disease into two groups: Group A = gluten-free diet (GFD); and Group B = gluten-free diet with zinc supplements (GFD +Zn). The rise in iron and zinc was significantly higher in the latter, but the mean rise of copper levels was slightly higher in the former, but the difference was not significant.
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Affiliation(s)
- K Negi
- 1 Postgraduate, Department of Pediatrics, 28856 Lady Hardinge Medical College , Kalawati Saran Children's Hospital, New Delhi, India
| | - R Kumar
- 2 Senior Resident, Department of Pediatrics, 28856 Lady Hardinge Medical College , Kalawati Saran Children's Hospital, New Delhi, India
| | - L Sharma
- 3 CMO, Department of Pediatrics, 28856 Lady Hardinge Medical College , Kalawati Saran Children's Hospital, New Delhi, India
| | - S P Datta
- 4 Scientist, Division of Soil Science and Agricultural Chemistry, 28802 Indian Agricultural Research Institute , New Delhi, India
| | - M Choudhury
- 5 Director Professor, Department of Pathology, 28856 Lady Hardinge Medical College , New Delhi, India
| | - P Kumar
- 6 Director Professor, Department of Pediatrics, 28856 Lady Hardinge Medical College , Kalawati Saran Children's Hospital, New Delhi, India
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Wink AE, Gross KD, Brown CA, Guermazi A, Roemer F, Niu J, Torner J, Lewis CE, Nevitt MC, Tolstykh I, Sharma L, Felson DT. Varus thrust during walking and the risk of incident and worsening medial tibiofemoral MRI lesions: the Multicenter Osteoarthritis Study. Osteoarthritis Cartilage 2017; 25:839-845. [PMID: 28104540 PMCID: PMC5473434 DOI: 10.1016/j.joca.2017.01.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 08/12/2016] [Revised: 12/13/2016] [Accepted: 01/10/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To determine the association of varus thrust during walking to incident and worsening medial tibiofemoral cartilage damage and bone marrow lesions (BMLs) over 2 years in older adults with or at risk for osteoarthritis (OA). METHOD Subjects from the Multicenter Osteoarthritis Study (MOST) were studied. Varus thrust was visually assessed from high-speed videos of forward walking trials. Baseline and two-year MRIs were acquired from one knee per subject and read for cartilage loss and BMLs. Logistic regression with generalized estimating equations was used to estimate the odds of incident and worsening cartilage loss and BMLs, adjusting for age, sex, race, body mass index (BMI), and clinic site. The analysis was repeated stratified by varus, neutral, and valgus alignment. RESULTS 1007 participants contributed one knee each. Varus thrust was observed in 29.9% of knees. Knees with thrust had 2.17 [95% CI: 1.51, 3.11] times the odds of incident medial BML, 2.51 [1.85, 3.40] times the odds of worsening medial BML, and 1.85 [1.35, 2.55] times the odds of worsening medial cartilage loss. When stratified by alignment, varus knees also had significantly increased odds of these outcomes. CONCLUSION Varus thrust observed during walking is associated with increased odds of incident and worsening medial BMLs and worsening medial cartilage loss. Increased odds of these outcomes persist in varus-aligned knees.
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Affiliation(s)
- A E Wink
- Department of Anatomy and Neurobiology, Boston University, Boston, MA, USA.
| | - K D Gross
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA; Department of Physical Therapy, MGH Institute of Health Professions, Boston, MA, USA.
| | - C A Brown
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA.
| | - A Guermazi
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, Boston, MA, USA.
| | - F Roemer
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany.
| | - J Niu
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA.
| | - J Torner
- Department of Epidemiology, University of Iowa, Iowa City, IA, USA.
| | - C E Lewis
- Department of Medicine, UAB, Birmingham, AL, USA.
| | - M C Nevitt
- Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA, USA.
| | - I Tolstykh
- Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA, USA.
| | - L Sharma
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - D T Felson
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA; NIHR Manchester Musculoskeletal Biomedical Research Unit, Central Manchester NHS Foundation, Manchester, UK.
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20
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Chang AH, Chmiel JS, Almagor O, Guermazi A, Prasad PV, Moisio KC, Belisle L, Zhang Y, Hayes K, Sharma L. Association of baseline knee sagittal dynamic joint stiffness during gait and 2-year patellofemoral cartilage damage worsening in knee osteoarthritis. Osteoarthritis Cartilage 2017; 25:242-248. [PMID: 27729289 PMCID: PMC5258842 DOI: 10.1016/j.joca.2016.10.004] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 08/11/2016] [Accepted: 10/05/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Knee sagittal dynamic joint stiffness (DJS) describes the biomechanical interaction between change in external knee flexion moment and flexion angular excursion during gait. In theory, greater DJS may particularly stress the patellofemoral (PF) compartment and thereby contribute to PF osteoarthritis (OA) worsening. We hypothesized that greater baseline knee sagittal DJS is associated with PF cartilage damage worsening 2 years later. METHODS Participants all had OA in at least one knee. Knee kinematics and kinetics during gait were recorded using motion capture systems and force plates. Knee sagittal DJS was computed as the slope of the linear regression line for knee flexion moments vs angles during the loading response phase. Knee magnetic resonance imaging (MRI) scans were obtained at baseline and 2 years later. We assessed the association between baseline DJS and baseline-to-2-year PF cartilage damage worsening using logistic regression with generalized estimating equations (GEE). RESULTS Our sample had 391 knees (204 persons): mean age 64.2 years (SD 10.0); body mass index (BMI) 28.4 kg/m2 (5.7); 76.5% women. Baseline knee sagittal DJS was associated with baseline-to-2-year cartilage damage worsening in the lateral (OR = 5.35, 95% CI: 2.37-12.05) and any PF (OR = 2.99, 95% CI: 1.27-7.04) compartment. Individual components of baseline DJS (i.e., change in knee moment or angle) were not associated with subsequent PF disease worsening. CONCLUSION Capturing the concomitant effect of knee kinetics and kinematics during gait, knee sagittal DJS is a potentially modifiable risk factor for PF disease worsening.
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Affiliation(s)
- A H Chang
- Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - J S Chmiel
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - O Almagor
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - A Guermazi
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, Boston, MA, USA.
| | - P V Prasad
- Department of Radiology, NorthShore University HealthSystem, Evanston, IL, USA.
| | - K C Moisio
- Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - L Belisle
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Y Zhang
- Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - K Hayes
- Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - L Sharma
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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Malik M, Arora P, Sachdeva R, Sharma L, Ramachandran VG, Pal R. Elucidation of the potential disease-promoting influence of IgM apoptotic cell-reactive antibodies in lupus. Lupus 2016; 25:684-98. [DOI: 10.1177/0961203315624023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 12/01/2015] [Indexed: 12/11/2022]
Abstract
The undigested remnants of apoptosis are believed to stimulate the generation of autoantibodies in lupus. The biological properties of initiator, disease-specific IgM antibodies that specifically recognize apoptotic cells, readily detected in the sera of lupus patients, remain unclear. Apoptotic cell-reactive IgM monoclonal antibodies (generated from lupus-prone mice), as opposed to control IgM, preferentially stimulated maturation of bone marrow-derived dendritic cells (BMDCs) derived from such mice, relative to BMDCs derived from healthy mice. An influence of both antibody specificity and cell genotype was also apparent in the secretion of signature inflammatory cytokines. Immunization of such antibodies in lupus-prone animals induced increases in total serum IgG levels, with the elicited antibodies also preferentially recognizing moieties on dying cells. An expanded specificity was apparent both upon Western blot on cellular lysate and from the enhanced recognition of dsDNA, Ro60, RNP68 and Sm; the antibody most efficient in mediating autoreactive diversity, while being germline encoded, also induced the highest degree of phenotypic changes on BMDCs. Apoptotic cell-reactive IgM antibodies may therefore be potentially capable of influencing the course of systemic autoimmune disease by affecting both innate and adaptive immunity.
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Affiliation(s)
- M Malik
- Department of Microbiology, University College of Medical Sciences & Guru Teg Bahadur Hospital, Delhi, India
| | - P Arora
- National Institute of Immunology, New Delhi, India
| | - R Sachdeva
- National Institute of Immunology, New Delhi, India
| | - L Sharma
- National Institute of Immunology, New Delhi, India
| | - V G Ramachandran
- Department of Microbiology, University College of Medical Sciences & Guru Teg Bahadur Hospital, Delhi, India
| | - R Pal
- National Institute of Immunology, New Delhi, India
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Sharma L, Pandey V, Nigam R, Saxena A, Swain DK, Yadav B. Association of oxidative status and semen characteristics with seminal plasma proteins of buffalo semen. Iran J Vet Res 2016; 17:226-230. [PMID: 28224004 PMCID: PMC5309452] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
To study the influence of season on oxidative status of buffalo semen and their association with semen characteristics and seminal plasma proteins, ejaculates were collected twice a week in winter, summer and rainy seasons from six adult Bhadawari buffalo bulls. The neat semen was analyzed for semen characteristics immediately after collection and oxidative status viz. lipid peroxidation (LPO), catalase (CAT), super oxide dismutase (SOD) activity, and total protein (TP) were estimated in seminal plasma. The protein profiling was carried out by one-dimensional sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). The significant effect of season was observed on TP, SOD activity and % protein fractions of seminal plasma proteins of buffalo bulls. The TP values showed positive correlation with ejaculate volume (EV), sperm concentration (SC), and % live-dead (LD) and negative correlation with progressive motility (PM), and hypo-osmotic swelling test (HOST). The SOD activity showed positive correlation with PM, LD, HOST and % acrosoamal integrity (AI). Besides that, results showed correlation of TP with 6.5, 38 and 66 kDa proteins, LPO with 70, 72, 84 and 86 kDa proteins, CAT with 70 kDa and 86 kDa proteins, and SOD with 6.5, 24.5, 44.5, 70 and 72 kDa proteins. In conclusion, this study indicated that TP and SOD activity of seminal plasma of buffalo bulls were influenced by season and were found to be associated with some of the semen characteristics and expression of seminal plasma proteins.
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Affiliation(s)
- L. Sharma
- Department of Veterinary Biochemistry, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India;
| | - V. Pandey
- Department of Veterinary Biochemistry, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India; ,Correspondence: V. Pandey, Department of Veterinary Biochemistry, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India. E-mail:
| | - R. Nigam
- Department of Veterinary Biochemistry, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India;
| | - A. Saxena
- Department of Veterinary Obstetrics and Gynecology, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India;
| | - D. K. Swain
- Department of Veterinary Physiology, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India
| | - B. Yadav
- Department of Veterinary Physiology, College of Veterinary Science and Animal Husbandry, Veterinary University, Mathura, 281001, India
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Guermazi A, Eckstein F, Hayashi D, Roemer FW, Wirth W, Yang T, Niu J, Sharma L, Nevitt MC, Lewis CE, Torner J, Felson DT. Baseline radiographic osteoarthritis and semi-quantitatively assessed meniscal damage and extrusion and cartilage damage on MRI is related to quantitatively defined cartilage thickness loss in knee osteoarthritis: the Multicenter Osteoarthritis Study. Osteoarthritis Cartilage 2015; 23:2191-2198. [PMID: 26162806 PMCID: PMC4957527 DOI: 10.1016/j.joca.2015.06.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [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: 12/25/2014] [Revised: 05/19/2015] [Accepted: 06/29/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To provide a comprehensive simultaneous relation of various semiquantitative knee OA MRI features as well as the presence of baseline radiographic osteoarthritis (OA) to quantitative longitudinal cartilage loss. METHODS We studied Multicenter OA Study (MOST) participants from a longitudinal observational study that included quantitative MRI measurement of cartilage thickness. These subjects also had Whole Organ MRI Score (WORMS) scoring of cartilage damage, bone marrow lesions (BMLs), meniscal pathology, and synovitis, as well as baseline radiographic evaluation for Kellgren and Lawrence (KL) grading. Knee compartments were classified as progressors when exceeding thresholds of measurement variability in normal knees. All potential risk factors of cartilage loss were dichotomized into "present" (score ≥2 for cartilage, ≥1 for others) or "absent". Differences in baseline scores of ipsi-compartmental risk factors were compared between progressor and non-progressor knees by multivariable logistic regression, adjusting for age, sex, body mass index, alignment axis (degrees) and baseline KL grade. Odds ratios (OR) and 95% CIs were calculated for medial femorotibial compartment (MFTC) and lateral femorotibial compartment (LFTC) cartilage loss. Cartilage loss across both compartments was studied using Generalized Estimating Equations. RESULTS 196 knees of 196 participants were included (age 59.8 ± 6.3 years [mean ± SD], BMI 29.5 ± 4.6, 62% women). For combined analyses of MFTC and LFTC, baseline factors related to cartilage loss were radiographic OA (KL grade ≥2: aOR 4.8 [2.4-9.5], cartilage damage (aOR 2.3 [1.2-4.4])), meniscal damage (aOR 3.9 [2.1-7.4]) and extrusion (aOR 2.9 [1.6-5.3]), all in the ipsilateral compartment, but not BMLs or synovitis. CONCLUSION Baseline radiographic OA and semiquantitatively (SQ) assessed MRI-detected cartilage damage, meniscal damage and extrusion, but not BMLs or synovitis is related to quantitatively measured ipsi-compartmental cartilage thinning over 30 months.
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Affiliation(s)
- A Guermazi
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA, USA.
| | - F Eckstein
- Institute of Anatomy, Paracelsus Medical University, Salzburg, Austria
| | - D Hayashi
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Radiology, Bridgeport Hospital, Yale School of Medicine, Bridgeport, CT, USA
| | - F W Roemer
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany
| | - W Wirth
- Institute of Anatomy, Paracelsus Medical University, Salzburg, Austria
| | - T Yang
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA
| | - J Niu
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA
| | - L Sharma
- Multidisciplinary Clinical Research Center in Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - M C Nevitt
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
| | - C E Lewis
- Division of Preventive Medicine, University of Alabama, Birmingham, AL, USA
| | - J Torner
- Department of Radiology at the University of Iowa, Iowa City, IA, USA
| | - D T Felson
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, MA, USA
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Pipil S, Kumar V, Rawat VS, Sharma L, Sehgal N. In silico and in vivo analysis of binding affinity of estrogens with estrogen receptor alpha in Channa punctatus (Bloch). Fish Physiol Biochem 2015; 41:31-40. [PMID: 25366672 DOI: 10.1007/s10695-014-0003-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
In the present study, potential interaction between natural estrogens i.e., estrone (E(1)), estradiol (E(2)) and estriol (E(3)) with human estrogen receptor (hER) was seen by in silico study. Molecular docking studies were carried out using Glide and ligand docking program. The binding affinity, assessed by Glide score, indicates stronger interaction of E(3) with hER followed by E(2) and E(1). Real-time PCR analysis of vga and vgb expressions, in the liver of different groups of Channa punctatus injected with the three natural estrogens, supported the docking analysis and indicated E(3) to be the most potent estrogen in inducing vga and vgb expressions followed by E(2) and E(1). This study lays the groundwork for studying interactions of various estrogenic substances with different estrogen receptors and to assess estrogenicity of various chemicals which are being released into the environment by employing molecular docking technique.
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Affiliation(s)
- S Pipil
- Department of Zoology, University of Delhi, Delhi, 110007, India
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25
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Pipil S, Rawat VS, Sharma L, Sehgal N. Characterization of incomplete vitellogenin (VgC) in the Indian freshwater murrel, Channa punctatus (Bloch). Fish Physiol Biochem 2015; 41:107-117. [PMID: 25389068 DOI: 10.1007/s10695-014-0009-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 10/31/2014] [Indexed: 06/04/2023]
Abstract
A novel incomplete vitellogenin (VgC) was purified from the plasma of estradiol-treated male murrel, Channa punctatus, by gel filtration chromatography. The native mass of VgC protein was 180 kDa, and it resolved as a single peptide of 100 kDa on SDS-PAGE. The peptide on subjecting to matrix-assisted laser desorption/ionization-time of flight produced a peptide mass fingerprint. On tandem mass spectrometry, some of these peptides showed mass to charge (m/z) ratio and amino acid sequence similarity with VgC peptides of other teleosts. Phylogenetic analysis revealed a similarity of murrel VgC with fish species of the order Perciformes. Semi-quantitative RT-PCR assay was developed to study expression of vgc gene at variable levels of estradiol exposure. Presence of VgC in males indicates that fish has been exposed to estrogens; hence, it can be used as a biomarker for estrogenic exposure.
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Affiliation(s)
- S Pipil
- Department of Zoology, University of Delhi, Delhi, 110007, India
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26
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Guermazi A, Eckstein F, Hayashi D, Roemer F, Wirth W, Yang T, Niu J, Sharma L, Nevitt M, Lewis C, Torner J, Felson D. THU0195 Semiquantitatively Assessed Bone Marrow Lesions, Cartilage Damage, Meniscal Damage and Extrusion PREDICT Quantitatively Measured Cartilage Thickness Loss in the Same Femorotibial Compartment: the Most Study. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2558] [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: 11/03/2022]
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Sharma L, Pandey V, Nigam R, Singh P, Saxena A, Swain DK. Seasonal Variations in Seminal Plasma Proteins of Buffalo. Reprod Domest Anim 2014; 49:387-91. [DOI: 10.1111/rda.12285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 01/02/2014] [Indexed: 11/29/2022]
Affiliation(s)
- L Sharma
- Department of Biochemistry; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
| | - V Pandey
- Department of Biochemistry; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
| | - R Nigam
- Department of Biochemistry; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
| | - P Singh
- Department of Biochemistry; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
| | - A Saxena
- Department of Veterinary Gynaecology and Obstetrics; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
| | - DK Swain
- Department of Veterinary Physiology; College of Veterinary Science and Animal Husbandry; UP Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalya evam Go Anusandhan Sansthan (DUVASU); Mathura Uttar Pradesh India
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Rawat VS, Pipil S, Sharma L, Sehgal N. Purification, characterization and expression of two vitellogenins in the Indian freshwater murrel Channa punctatus. Gen Comp Endocrinol 2013; 189:119-26. [PMID: 23702030 DOI: 10.1016/j.ygcen.2013.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 04/30/2013] [Accepted: 05/03/2013] [Indexed: 11/21/2022]
Abstract
The present study was undertaken to characterize different vitellogenins in Channa punctatus. Protein purification by gel chromatography followed by fast protein liquid chromatography (FPLC) revealed existence of two different Vg forms. Liquid chromatography tandem mass spectrophotometry (LC-MS/MS) suggested the existence of Vga and Vgb. Cloning of partial sequences of vga and vgb mRNA and phylogenetic analysis substantiated the existence of two vitellogenins. Real time PCR for vga and vgb genes from liver of estradiol-17β (E2) treated fish reveals difference in expression levels of transcripts of these two genes. vgb is expressed at lower dose of estradiol suggesting a higher sensitivity to estradiol. The present study thus proposes different regulatory control for the expression of these two genes and vgb as a superior biomarker than vga to assess exposure of C. punctatus to environmental estrogens.
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Affiliation(s)
- V S Rawat
- Department of Zoology, Hindu College, University of Delhi, Delhi 110007, India
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Neopane A, Sharma L, Dulal S, Panta S. Value of sputum differential count in chronic obstructive airway disease. J Nepal Health Res Counc 2013; 11:26-29. [PMID: 23787521] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Sputum differential count is a useful tool to evaluate airway inflammation in chronic airway diseases. Since COPD (chronic obstructive airway disease) is so common in our setting this simple tool can be used to initiate and follow up treatment and progression of disease process. METHODS A prospective cross sectional study was done in Department of Medicine, in a Teaching Hospital from June 2011 to June 2012. All patients admitted with acute exacerbation of chronic airway disease to the Department of Medicine were included in the study and their sputum was sent for differential count. RESULTS Predominant cause of chronic airway disease was COPD 61 (85.9%). The sputum of these patients predominantly showed neutrophilia in the differential count with a mean neutrophil count of 82.06%. This was significantly high than the stated 60% in stable COPD. None of the COPD patients had eosinophilia or lymphocytosis. One patient with asthma showed eosinophil count of 12%. In these patients the peripheral blood smear differential did not show correlation with sputum neutrophilia (r2≥002, p≥0.05). CONCLUSIONS Sputum differential has an important role in management of chronic airway diseases.
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Affiliation(s)
- A Neopane
- Department of Medicine, Kathmandu Medical College Teaching Hospital, Sinamangal, Kathmandu, Nepal. arpana.neopane@ gmail.com
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Bajpai S, Das P, Sharma L. Investigation of Dynamic Release of Antibiotic Drug Gentamicin Sulphate from Cotton Cellulose/Polyacrylic Acid Composite Fibers. Journal of Macromolecular Science, Part A 2012. [DOI: 10.1080/10601325.2013.735968] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- S.K. Bajpai
- a Polymer Research Laboratory, Department of Chemistry , Govt. Model Science College , Jabalpur , (M.P) , India
| | - P. Das
- b Department of Chemistry , Smt. C.H.M. College, Ulhasnagar , Mumbai , (Maharashtra) , India
| | - L. Sharma
- a Polymer Research Laboratory, Department of Chemistry , Govt. Model Science College , Jabalpur , (M.P) , India
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Bajpai SK, Bajpai M, Sharma L. In Situ Formation of Silver Nanoparticles in Poly(N-Isopropyl Acrylamide) Hydrogel for Antibacterial Applications. Des Monomers Polym 2012. [DOI: 10.1163/138577211x577231] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- S. K. Bajpai
- a Department of Chemistry, Polymer Research Laboratory, Govt Model Science College, Jabalpur (M.P.)-482001, India;,
| | - M. Bajpai
- b Department of Chemistry, Polymer Research Laboratory, Govt Model Science College, Jabalpur (M.P.)-482001, India
| | - L. Sharma
- c Department of Chemistry, Polymer Research Laboratory, Govt Model Science College, Jabalpur (M.P.)-482001, India
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Singh NK, Lee HJ, Jeong DK, Arun HS, Sharma L, Hwang IH. Myogenic Satellite Cells and Its Application in Animals - A Review. Asian Australas J Anim Sci 2009. [DOI: 10.5713/ajas.2009.90042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Niu J, Zhang YQ, Torner J, Nevitt M, Lewis CE, Aliabadi P, Sack B, Clancy M, Sharma L, Felson DT. Is obesity a risk factor for progressive radiographic knee osteoarthritis? ACTA ACUST UNITED AC 2009; 61:329-35. [PMID: 19248122 DOI: 10.1002/art.24337] [Citation(s) in RCA: 182] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To examine whether obesity increases the risk of progression of knee osteoarthritis (OA). METHODS We used data from the Multicenter Osteoarthritis Study, a longitudinal study of persons with or at high risk of knee OA. OA was characterized at baseline and 30 months using posteroanterior fixed-flexion radiographs and Kellgren/Lawrence (K/L) grading, with alignment assessed on full-extremity films. In knees with OA at baseline (K/L grade 2 or 3), progression was defined as tibiofemoral joint space narrowing on the 30-month radiograph. In knees without OA at baseline (K/L grade 0 or 1), incident OA was defined as the development of radiographic OA at 30 months. Body mass index (BMI) at baseline was classified as normal (<25 kg/m(2)), overweight (25-<30 kg/m(2)), obese (30-<35 kg/m(2)), and very obese (>or=35 kg/m(2)). The risk of progression was tested in all knees and in subgroups categorized according to alignment. Analyses were adjusted for age, sex, knee injury, and bone density. RESULTS Among the 2,623 subjects (5,159 knees), 60% were women, and the mean +/- SD age was 62.4 +/- 8.0 years. More than 80% of subjects were overweight or obese. At baseline, 36.4% of knees had tibiofemoral OA, and of those, only one-third were neutrally aligned. Compared with subjects with a normal BMI, those who were obese or very obese were at an increased risk of incident OA (relative risk 2.4 and 3.2, respectively [P for trend < 0.001]); this risk extended to knees from all alignment groups. Among knees with OA at baseline, there was no overall association between a high BMI and the risk of OA progression; however, an increased risk of progression was observed among knees with neutral but not varus alignment. The effect of obesity was intermediate in those with valgus alignment. CONCLUSION Although obesity was a risk factor for incident knee OA, we observed no overall relationship between obesity and the progression of knee OA. Obesity was not associated with OA progression in knees with varus alignment; however, it did increase the risk of progression in knees with neutral or valgus alignment. Therefore, weight loss may not be effective in preventing progression of structural damage in OA knees with varus alignment.
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Affiliation(s)
- J Niu
- Boston University School of Medicine, Boston, Massachusetts 02118, USA
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Santos LL, Dacumos A, Yamana J, Sharma L, Morand EF. Reduced arthritis in MIF deficient mice is associated with reduced T cell activation: down-regulation of ERK MAP kinase phosphorylation. Clin Exp Immunol 2008; 152:372-80. [PMID: 18341611 DOI: 10.1111/j.1365-2249.2008.03639.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Macrophage migration inhibitory factor (MIF) is a pleiotropic pro-inflammatory cytokine with many cellular targets in rheumatoid arthritis (RA). MIF has been reported to activate cells via mitogen-activated protein kinase and serine/threonine kinase (AKT or protein kinase B)-dependent signal transduction pathways. Its contribution to T cell activation and signalling in RA is not known. Using MIF -/- mice and a T cell-mediated model of RA, antigen-induced arthritis, we investigated the role of MIF in T cell activation and signalling. Arthritis severity was significantly reduced in MIF -/- mice compared with wildtype mice. This reduction was associated with decreased T cell activation parameters including footpad delayed type hypersensitivity, antigen-induced splenocyte proliferation and cytokine production. Splenocyte proliferation required extracellular signal-regulated kinase (ERK)1/2 phosphorylation, and decreased T cell activation in MIF -/- mice was associated with decreased phosphorylation of ERK1/2 but not AKT. Collectively, these data suggest that MIF promotes antigen-specific immune responses via regulation of ERK phosphorylation in T cells.
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Affiliation(s)
- L L Santos
- Monash University, Department of Medicine, Monash Medical Centre, Clayton, Melbourne, Victoria, Australia.
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Cahue S, Sharma L, Dunlop D, Ionescu M, Song J, Lobanok T, King L, Poole AR. The ratio of type II collagen breakdown to synthesis and its relationship with the progression of knee osteoarthritis. Osteoarthritis Cartilage 2007; 15:819-23. [PMID: 17344068 PMCID: PMC2139981 DOI: 10.1016/j.joca.2007.01.016] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Accepted: 01/21/2007] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To examine whether the baseline ratio of a type II collagen breakdown marker to a synthesis marker, or the level of these markers individually, is associated with the likelihood of knee osteoarthritis (OA) progression between baseline and 18 months. METHODS Participants were recruited from community sources and had knee OA. Blood was drawn at baseline. Collagen synthesis was measured by commercial enzyme-linked immunosorbent assay (ELISA) assay that detects c-propeptide of type II procollagen (CPII). Serum markers of collagenase cleavage of cartilage type II collagen [C2C epitope (COL2-3/4Clong mono) and C1,2C epitope (COL2-3/4Cshort)] were also assayed. Knee radiographs (semi-flexed with fluoro confirmation) were obtained at baseline and 18 months. OA progression was examined using worsening of joint space grade and worsening of Kellgren/Lawrence grade. The relationship between baseline serum markers and subsequent progression was analyzed from logistic regression. RESULTS Baseline levels of these markers, considered individually, were not associated with a change in the odds of progression. Belonging to the low synthesis tertile was associated with a greater likelihood of progression, approaching significance (adjusted odds ratio [OR] 1.86, 95% confidence interval [CI] 0.96, 3.63). A greater C2C:CPII ratio and C1,2C:CPII ratio were each associated with an increase in the odds of joint space grade progression, which approached significance (e.g., adjusted OR of C2C:CPII ratio was 3.15, 95% CI 0.91, 10.85). CONCLUSION While the degradation markers individually, considered as continuous variables, did not predict OA progression, belonging to the lower synthesis marker tertile and greater degradation/synthesis marker ratios were associated with an elevation in the odds of progression albeit not achieving significance.
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Affiliation(s)
- S Cahue
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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Mittra S, Sangle G, Tandon R, Sharma S, Roy S, Khanna V, Gupta A, Sattigeri J, Sharma L, Priyadarsiny P, Khattar SK, Bora RS, Saini KS, Bansal VS. Increase in weight induced by muraglitazar, a dual PPARalpha/gamma agonist, in db/db mice: adipogenesis/or oedema? Br J Pharmacol 2007; 150:480-7. [PMID: 17211457 PMCID: PMC2189717 DOI: 10.1038/sj.bjp.0707000] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND PURPOSE Muraglitazar, a dual PPARalpha/gamma agonist, caused a robust increase in body weight in db/db mice. The purpose of the study was to see if this increase in weight was due to oedema and/or adipogenesis. EXPERIMENTAL APPROACH The affinity of muraglitazar at PPARalpha/gamma receptors was characterized using transactivation assays. Pre-adipocyte differentiation, expression of genes for adipogenesis (aP2), fatty acid oxidation (ACO) and sodium reabsorption (ENaCgamma and Na+, K+-ATPase); haemodilution parameters and serum electrolytes were measured to delineate the role of muraglitazar in causing weight gain vis a vis rosiglitazone. KEY RESULTS Treatment with muraglitazar (10 mg kg(-1)) for 14 days significantly reduced plasma glucose and triglycerides. Reduction in plasma glucose was significantly greater than after similar treatment with rosiglitazone (10 mg kg(-1)). A marked increase in weight was also observed with muraglitazar that was significantly greater than with rosiglitazone. Muraglitazar increased aP2 mRNA and caused adipocyte differentiation in 3T3-L1 cells similar to rosiglitazone. It also caused a marked increase in ACO mRNA in the liver of the treated mice. Expression of mRNA for ENaCgamma and Na+, K+-ATPase in kidneys was up-regulated after either treatment. Increased serum electrolytes and decreased RBC count, haemoglobin and haematocrit were observed with both muraglitazar and rosiglitazone. CONCLUSIONS AND IMPLICATIONS Although muraglitazar has a better glucose lowering profile, it also has a greater potential for weight gain than rosiglitazone. In conclusion, muraglitazar causes both robust adipogenesis and oedema in a 14-day treatment of db/db mice as observed in humans.
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Affiliation(s)
- S Mittra
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - G Sangle
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - R Tandon
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - S Sharma
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - S Roy
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - V Khanna
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - A Gupta
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - J Sattigeri
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - L Sharma
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - P Priyadarsiny
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - S K Khattar
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - R S Bora
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - K S Saini
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
| | - V S Bansal
- Ranbaxy Research Laboratories, New Drug Discovery Research Gurgaon, Haryana, India
- Author for correspondence:
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Tiderius C, Hori M, Williams A, Sharma L, Prasad PV, Finnell M, McKenzie C, Burstein D. dGEMRIC as a function of BMI. Osteoarthritis Cartilage 2006; 14:1091-7. [PMID: 16782361 DOI: 10.1016/j.joca.2006.05.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2006] [Accepted: 05/09/2006] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) reflects cartilage glycosaminoglycan (GAG) distribution. The technique assumes that the plasma levels of the contrast agent Gd-DTPA(2-) are the same across individuals after intravenous (IV) injection, when dosing by weight. However, adipose tissue has lower extracellular water (ECW) than lean tissue. The aims of this study were to measure (1) plasma Gd-DTPA(2-) levels vs body mass index (BMI), and (2) dGEMRIC vs BMI after correcting for the dose-BMI effect. METHOD (1) Plasma Gd-DTPA(2-) levels were analyzed at 3-90 min after IV injection per body weight in 24 individuals with BMI between 21.5 and 46.5. (2) dGEMRIC was compared with BMI in 19 asymptomatic volunteers and 23 with osteoarthritis (OA). RESULTS (1) Plasma Gd-DTPA(2-) kinetics were similar in obese and non-obese groups, however, overall concentration was higher in the obese group. A very obese subject (BMI 45) would have 1.4 times higher Gd-DTPA(2-) concentration than a lean subject (BMI 20), which translates into a bias in dGEMRIC of up to 20%. (2) With dose bias taken into account, dGEMRIC showed no correlation with BMI in asymptomatic knees. In OA knees, unnarrowed femoral compartments demonstrated a negative correlation between dGEMRIC and BMI (R=0.57, P=0.004). No correlation was seen in radiographically narrowed compartments. CONCLUSION BMI can be a source of dosing bias in dGEMRIC and a correction factor should be considered in cross-sectional studies with a large range of BMI. There is no correlation between dGEMRIC and BMI in asymptomatic knees, but a negative correlation in OA knees.
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Affiliation(s)
- C Tiderius
- Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
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Torres L, Dunlop DD, Peterfy C, Guermazi A, Prasad P, Hayes KW, Song J, Cahue S, Chang A, Marshall M, Sharma L. The relationship between specific tissue lesions and pain severity in persons with knee osteoarthritis. Osteoarthritis Cartilage 2006; 14:1033-40. [PMID: 16713310 DOI: 10.1016/j.joca.2006.03.015] [Citation(s) in RCA: 263] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2005] [Accepted: 03/28/2006] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Pain is the most common symptom in knee osteoarthritis (OA), a leading cause of chronic disability, and a major source of the disability attributable to OA in general. Pain severity in knee OA is variable, ranging from barely perceptible to immobilizing. The knee lesions that contribute to pain severity have received little attention. OBJECTIVE To examine whether worse pathology of specific knee tissues - i.e. cartilage, bone (attrition, cysts, bone marrow lesions, and osteophytes), menisci (tears and subluxation), ligaments, and synovium (synovitis/effusion) - is associated with more severe knee pain. METHODS One hundred and forty-three individuals were recruited from the community with primary (idiopathic) knee OA, with definite tibiofemoral osteophytes in at least one knee, and at least some difficulty with knee-requiring activity. Knee magnetic resonance (MR) images were acquired using coronal T1-weighted spin-echo (SE), sagittal fat-suppressed dual-echo turbo SE, and axial and coronal fat-suppressed, T1-weighted 3D-fast low angle shot (FLASH) sequences. The whole-organ magnetic resonance imaging (MRI) scoring (WORMS) method was used to score knee tissue status. Since summing tissue scores across the entire joint, including regions free of disease, may dilute the ability to detect a true relationship between that tissue and pain severity, we used the score from the worst compartment (i.e. with the poorest cartilage morphology) as our primary approach. Knee pain severity was measured using knee-specific, 100 mm visual analogue scales. In analyses to evaluate the relationship between knee pain severity and lesion score, median quantile regression was used, adjusting for age and body mass index (BMI), in which a 95% CI excluding 0 is significant. RESULTS The increase in median pain from median quantile regression, adjusting for age and BMI, was significant for bone attrition (1.91, 95% confidence interval (CI) 0.68, 3.13), bone marrow lesions (3.72, 95% CI 1.76, 5.68), meniscal tears (1.99, 95% CI 0.60, 3.38), and grade 2 or 3 synovitis/effusion vs grade 0 (9.82, 95% CI 0.38, 19.27). The relationship with pain severity was of borderline significance for osteophytes and cartilage morphology and was not significant for bone cysts or meniscal subluxation. Ligament tears were too infrequent for meaningful analysis. When compared to the pain severity in knees with high scores for both bone attrition and bone marrow lesions (median pain severity 40 mm), knees with high attrition alone (30 mm) were not significantly different, but knees with high bone marrow lesion without high attrition scores (15 mm) were significantly less painful. CONCLUSION In persons with knee OA, knee pain severity was associated with subarticular bone attrition, bone marrow lesions, synovitis/effusion, and meniscal tears. The contribution of bone marrow lesions to pain severity appeared to require the presence of bone attrition.
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Affiliation(s)
- L Torres
- Department of Medicine, Feinberg School of Medicine, Northwestern University, USA
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Affiliation(s)
- M C Nevitt
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA 94105, USA.
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Abstract
Cyclodextrins (CDs), in the presence or absence of detergents, have been reported to suppress aggregate formation during the refolding of a number of proteins. A structure-activity relationship study between CD chemistry and refolding of lysozyme was performed and compared to carbonic anhydrase, in order to better understand the mechanism of CD-assisted protein refolding and to identify CDs that could function as good protein folding agents. Among the natural CDs, which have only hydroxyl groups, alpha-CD, with a smaller cavity size was more effective than the oligosaccharide with a larger cavity, gamma-CD. Replacement of the hydroxyls with other functional groups did not improve, but could seriously interfere, with the lysozyme refolding ability of alpha-CD. In case of gamma-CD, substitution of its hydroxyls with other groups either enhanced or diminished its refolding capability towards lysozyme. In general, neutral CDs were better refolding agents than the charged sugars. The presence of anionic substituents like carboxyl and phosphate groups actually promoted aggregate formation and completely abolished the sugar's refolding ability. This effect was more pronounced with lysozyme than with carbonic anhydrase. CDs with cationic functional groups did not show any significant effects on lysozyme refolding. The presence of both anionic and cationic substituents on the same CD molecule was found to partially restore its renaturation ability. Electrophoresis data indicate that CDs, which promoted lysozyme refolding, arrested aggregation at the stage of smaller soluble aggregates. Interestingly, the structure-activity relationship observed with lysozyme was quite similar to that reported for a non-disulfide protein, carbonic anhydrase. These results suggest that the effects of CDs on protein refolding are attributed to their ability to suppress aggregation of proteins. CDs may show properties similar to chaotropic agents, which may help explain their anti-aggregation and protein refolding ability. Besides alpha-CD, a number of other neutral CDs were found to be effective protein folding aids.
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Affiliation(s)
- A Desai
- Department of Chemistry, Central Michigan University, Dow 346, Mt. Pleasant, MI 48859, USA
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Abstract
Bilateral simultaneous anterior dislocation of the shoulders with bilateral 3-part fracture of the proximal humeri is unusual. A 42-year-old man presented with pain and restriction of movement on both shoulders. He was injured by a heavy object falling over his back while he was leaning forward holding an overhead bar. His arms were abducted and externally rotated. The injury was not correctly diagnosed, and the patient was treated with repeated manipulations and splintage for 2 weeks. Radiological examination revealed bilateral anterior dislocation of the shoulders with displaced 3-part fractures of the proximal humeri involving the shaft, greater tuberosity, and head. The patient was treated with open reduction and internal fixation through a deltopectoral approach using multiple Kirschner wires. The shoulders were kept immobilised for 3 weeks until the removal of the wires. The patient was able to resume work 3 months after surgery. He had an excellent and comfortable range of motion in both shoulders at one-year follow-up.
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Affiliation(s)
- L Sharma
- Department of Orthopaedics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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von Eisenhart-Rothe R, Graichen H, Hudelmaier M, Vogl T, Sharma L, Eckstein F. Femorotibial and patellar cartilage loss in patients prior to total knee arthroplasty, heterogeneity, and correlation with alignment of the knee. Ann Rheum Dis 2005; 65:69-73. [PMID: 15975965 PMCID: PMC1797992 DOI: 10.1136/ard.2005.038869] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To analyse tibial, femoral, and patellar cartilage loss in patients prior to total knee arthroplasty (TKA), and its correlation with alignment of the knee. METHODS 26 patients (aged 58 to 86 years) with a clinical indication for TKA were investigated. Quantitative end points of cartilage morphology (T scores for cartilage volume normalised to total subchondral bone area) were determined from coronal and axial magnetic resonance image data, using proprietary software. The static alignment of the knee was determined from standing full limb radiographs. RESULTS The magnitude of cartilage loss (T score of normalised cartilage volume) was highly variable within the knee, correlation coefficients ranging from r = 0.17 to 0.51 between cartilage plates. The correlation of cartilage loss with static alignment of the knee (as a continuous variable) was r = -0.52 (p<0.05) for the medial tibia, -0.38 (not significant) for the medial femur, +0.76 (p<0.001) for the lateral tibia, +0.31 (not significant) for the lateral femur, and -0.09 for the patella. When analysing alignment independent of direction (valgus or varus), the correlation for the patella increased to r = 0.30, but remained non-significant. CONCLUSIONS Cartilage loss was highly variable among patients and among cartilage plates before knee arthroplasty. Its correlation with alignment was stronger for the tibia than for the femur. There was some evidence for an association of alignment and patellar cartilage loss. These findings stimulate further research on the mechanism and cause-effect relation of alignment and knee osteoarthritis using quantitative magnetic resonance imaging technology.
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Biswas G, Kurkure P, Banavali S, Achrekar S, Kulkarni P, Bhagwat R, Sharma L. Challenges in management of advanced neuroblastoma: Experience at Tata Memorial Hospital, Mumbai, India. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8562] [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: 11/20/2022] Open
Affiliation(s)
- G. Biswas
- TATA MEMORIAL HOSPITAL, MUMBAI, India
| | | | | | | | | | | | - L. Sharma
- TATA MEMORIAL HOSPITAL, MUMBAI, India
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Sharma L, Melis E, Hickey MJ, Clyne CD, Davenport P, Erlich J, Morand E, Carmeliet P, Tipping PG. The cytoplasmic domain of tissue factor contributes to leukocyte recruitment and death in endotoxemia. J Thromb Haemost 2003. [DOI: 10.1111/j.1538-7836.2003.tb04442.x] [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: 11/28/2022]
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Sharma L, Hickey MJ, Melis E, Carlin K, Carmeliet P, Tipping PG. The cytoplasmic domain of tissue factor plays an important role in innate and adaptive immunity. J Thromb Haemost 2003. [DOI: 10.1111/j.1538-7836.2003.tb03308.x] [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: 11/29/2022]
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Sharma L, Mishra MK. A comparative study of PUVASOL therapy in lichen planus. Indian J Dermatol Venereol Leprol 2003; 69:212-3. [PMID: 17642889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
BACKGROUND PUVA therapy is reported to be effective in lichen planus. However, PUVASOL therapy is more easily available in India. AIM To carry out a three way open comparison of oral PUVASOL therapy with oral metronidazole and with the conventional oral antihistamine plus topical steroid therapy. MATERIAL AND METHODS Seventy-five cases of lichen planus were studied for 12 weeks with three different modalities: 1. Oral metronidazole and topical emollient cream, 2. Oral PUVASOL and topical emollient cream, and 3. Oral cetirizine and topical betamethasone dipropionate cream. Lesions were assessed before starting the treatment and after every 4 weeks. RESULTS Seventy patients completed the trial. Statistical analysis showed that therapy 1 was less effective than 2 and 3, which were found to be equally effective. CONCLUSION It is concluded that PUVASOL therapy is a useful alternative to conventional therapy in lichen planus in our country where sunlight is available in plenty.
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Affiliation(s)
- L Sharma
- Department of Dermatology &Venereology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, U.P.
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McDermott MM, Greenland P, Liu K, Guralnik JM, Criqui MH, Dolan NC, Chan C, Celic L, Pearce WH, Schneider JR, Sharma L, Clark E, Gibson D, Martin GJ. Leg symptoms in peripheral arterial disease: associated clinical characteristics and functional impairment. JAMA 2001; 286:1599-606. [PMID: 11585483 DOI: 10.1001/jama.286.13.1599] [Citation(s) in RCA: 574] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT Persons with lower-extremity peripheral arterial disease (PAD) are often asymptomatic or have leg symptoms other than intermittent claudication (IC). OBJECTIVE To identify clinical characteristics and functional limitations associated with a broad range of leg symptoms identified among patients with PAD. DESIGN, SETTING, AND PARTICIPANTS Cross-sectional study of 460 men and women with PAD and 130 without PAD, who were identified consecutively, conducted between October 1998 and January 2000 at 3 Chicago-area medical centers. MAIN OUTCOME MEASURES Ankle-brachial index score of less than 0.90; scores from 6-minute walk, accelerometer-measured physical activity over 7 days, repeated chair raises, standing balance (full tandem stand), 4-m walking velocity, San Diego claudication questionnaire, Geriatric Depression Score Short-Form, and the Walking Impairment Questionnaire. RESULTS All groups with PAD had poorer functioning than participants without PAD. The following values are for patients without IC vs those with IC. Participants in the group with leg pain on exertion and rest (n = 88) had a higher (poorer) score for neuropathy (5.6 vs 3.5; P<.001), prevalence of diabetes mellitus (48.9% vs 26.7%; P<.001), and spinal stenosis (20.8% vs 7.2%; P =.002). The atypical exertional leg pain/carry on group (exertional leg pain other than IC associated with walking through leg pain [n = 41]) and the atypical exertional leg pain/stop group (exertional leg pain other than IC that causes one to stop walking [n = 90]) had better functioning than the IC group. The group without exertional leg pain/inactive (no exertional leg pain in individual who walks </=6 blocks per week [n = 28]) and the leg pain on exertion and rest group had poorer functioning than those with IC. Adjusting for age, sex, race, and comorbidities and compared with IC, participants with atypical exertional leg pain/carry on achieved a greater distance on the 6-minute walk (404.3 vs 328.5 m; P<.001) and were less likely to stop during the 6-minute walk (6.8% vs 36%; P =.002). The group with pain on exertion and rest had a slower time for completing 5 chair raises (13.5 vs 11.9 seconds; P =.009), completed the tandem stand less frequently (37.5% vs 60.0%; P =.004), and had a slower 4-m walking velocity (0.80 vs 0.90 m/s; P<.001). CONCLUSIONS There is a wide range of leg symptoms in persons with PAD beyond that of classic IC. Comorbid disease may contribute to these symptoms in PAD. Functional impairments are found in every PAD symptom group, and the degree of functional limitation varies depending on the type of leg symptom.
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Affiliation(s)
- M M McDermott
- Department of Medicine, Northwestern University Medical School, Chicago, IL, USA.
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Abstract
Osteoarthritis is widely believed to be the result of local factors acting within the context of systemic susceptibility. Local factors, which are specific to joint site and in some instances specific to joint compartment, are receiving increasing attention in natural history studies of osteoarthritis. This review focuses on epidemiologic investigations dealing with these local factors. Local factors may be further characterized as extrinsic or intrinsic to the joint organ. In the past, the epidemiologic literature has emphasized the extrinsic category, factors and events that have an origin external to the joint and its immediate environment--for example, physical activity and injury. In recent years, intrinsic factors such as alignment, strength, laxity, and proprioception have begun to receive more attention. Ultimately, epidemiologic studies aid the development of strategies to prevent disease development or modify its course. Such strategies may be especially powerful for local factors, given the vicious cycles set in motion by these factors and the effect of these factors on neighboring joint-organ structures.
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Affiliation(s)
- L Sharma
- Division of Rheumatology, Northwestern University Medical School, Chicago, Illinois 60611, USA.
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Ng FM, Sun J, Sharma L, Libinaka R, Jiang WJ, Gianello R. Metabolic studies of a synthetic lipolytic domain (AOD9604) of human growth hormone. Horm Res 2001; 53:274-8. [PMID: 11146367 DOI: 10.1159/000053183] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A synthetic analogue (AOD9604) of the lipolytic domain of human growth hormone (hGH) has been studied for its metabolic actions in obese Zucker rats. Daily treatment with an oral dose of AOD9604 of 500 microg/kg body weight for 19 days reduced over 50% (15.8 +/- 0.6 vs. 35.6 +/- 0.8 g) body weight gain of the animals in comparison with the control. The adipose tissues of the AOD9604--treated animals were found to have an increase in lipolytic activity. In contrast to chronic treatment with intact hGH, chronic treatment with AOD9604 showed no adverse effect on insulin sensitivity of the animals, as demonstrated with euglycemic clamp techniques. The results in the present study suggest that the analogue of the hGH lipolytic domain may have the potential to be developed into an orally usable and safe therapeutic agent for obesity.
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Affiliation(s)
- F M Ng
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Vic., Australia.
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50
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Abstract
CONTEXT Knee osteoarthritis (OA) is a leading cause of disability in older persons. Few risk factors for disease progression or functional decline have been identified. Hip-knee-ankle alignment influences load distribution at the knee; varus and valgus alignment increase medial and lateral load, respectively. OBJECTIVE To test the hypotheses that (1) varus alignment increases risk of medial knee OA progression during the subsequent 18 months, (2) valgus alignment increases risk of subsequent lateral knee OA progression, (3) greater severity of malalignment is associated with greater subsequent loss of joint space, and (4) greater burden of malalignment is associated with greater subsequent decline in physical function. DESIGN AND SETTING Prospective longitudinal cohort study conducted March 1997 to March 2000 at an academic medical center in Chicago, Ill. PARTICIPANTS A total of 237 persons recruited from the community with primary knee OA, defined by presence of definite tibiofemoral osteophytes and at least some difficulty with knee-requiring activity; 230 (97%) completed the study. MAIN OUTCOME MEASURES Progression of OA, defined as a 1-grade increase in severity of joint space narrowing on semiflexed, fluoroscopically confirmed knee radiographs; change in narrowest joint space width; and change in physical function between baseline and 18 months, compared by knee alignment at baseline. RESULTS Varus alignment at baseline was associated with a 4-fold increase in the odds of medial progression, adjusting for age, sex, and body mass index (adjusted odds ratio [OR], 4.09; 95% confidence interval [CI], 2.20-7.62). Valgus alignment at baseline was associated with a nearly 5-fold increase in the odds of lateral progression (adjusted OR, 4.89; 95% CI, 2.13-11.20). Severity of varus correlated with greater medial joint space loss during the subsequent 18 months (R = 0.52; 95% CI, 0.40-0.62 in dominant knees), and severity of valgus correlated with greater subsequent lateral joint space loss (R = 0.35; 95% CI, 0.21-0.47 in dominant knees). Having alignment of more than 5 degrees (in either direction) in both knees at baseline was associated with significantly greater functional deterioration during the 18 months than having alignment of 5 degrees or less in both knees, after adjusting for age, sex, body mass index, and pain. CONCLUSION This is, to our knowledge, the first demonstration that in primary knee OA varus alignment increases risk of medial OA progression, that valgus alignment increases risk of lateral OA progression, that burden of malalignment predicts decline in physical function, and that these effects can be detected after as little as 18 months of observation.
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Affiliation(s)
- L Sharma
- Northwestern University Medical School, 303 E Chicago Ave, Ward Bldg 3-315, Chicago, IL 60611, USA.
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