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Han K, Kim M, Lee D, Won J, Kim G, Kwon J, Han S, Kim D, Kim H, Baek S, Lee J. 03:09 PM Abstract No. 412 Safety of co-placement of ventriculoperitoneal shunt and percutaneous radiologic gastrostomy. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kwon J, Han K, Lee J, Won J, Kim M, Kim G, Lee D, Han S, Baek S. Abstract No. 510 Safety and efficacy of percutaneous cryoablation for small hepatocellular carcinomas adjacent to the heart. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Marsh CL, Kurian SM, Rice JC, Whisenant TC, David J, Rose S, Schieve C, Lee D, Case J, Barrick B, Peddi VR, Mannon RB, Knight R, Maluf D, Mandelbrot D, Patel A, Friedewald JJ, Abecassis MM, First MR. Application of TruGraf v1: A Novel Molecular Biomarker for Managing Kidney Transplant Recipients With Stable Renal Function. Transplant Proc 2019; 51:722-728. [PMID: 30979456 DOI: 10.1016/j.transproceed.2019.01.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/10/2018] [Accepted: 01/17/2019] [Indexed: 01/22/2023]
Abstract
TruGraf v1 is a laboratory-developed DNA microarray-based gene expression blood test to enable proactive noninvasive serial assessment of kidney transplant recipients with stable renal function. It has been previously validated in patients identified as Transplant eXcellence (TX: stable serum creatinine, normal biopsy results, indicative of immune quiescence), and not-TX (renal dysfunction and/or rejection on biopsy results). TruGraf v1 is intended for use in subjects with stable renal function to measure the immune status as an alternative to invasive, expensive, and risky surveillance biopsies. MATERIALS AND METHODS In this study, simultaneous blood tests and clinical assessments were performed in 192 patients from 7 transplant centers to evaluate TruGraf v1. The molecular testing laboratory was blinded to renal function and biopsy results. RESULTS Overall, TruGraf v1 accuracy (concordance between TruGraf v1 result and clinical and/or histologic assessment) was 74% (142/192), and a result of TX was accurate in 116 of 125 (93%). The negative predictive value for TruGraf v1 was 90%, with a sensitivity 74% and specificity of 73%. Results did not significantly differ in patients with a biopsy-confirmed diagnosis vs those without a biopsy. CONCLUSIONS TruGraf v1 can potentially support a clinical decision enabling unnecessary surveillance biopsies with high confidence, making it an invaluable addition to the transplant physician's tool kit for managing patients. TruGraf v1 testing can potentially avoid painful and risky invasive biopsies, reduce health care costs, and enable frequent assessment of patients with stable renal function to confirm the presence of immune quiescence in the peripheral blood.
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Stephenson D, Perry A, Appleby MR, Lee D, Davison J, Johnston A, Jones AL, Nelson A, Bourke SJ, Thomas MF, De Soyza A, Lordan JL, Lumb J, Robb AE, Samuel JR, Walton KE, Perry JD. An evaluation of methods for the isolation of nontuberculous mycobacteria from patients with cystic fibrosis, bronchiectasis and patients assessed for lung transplantation. BMC Pulm Med 2019; 19:19. [PMID: 30665395 PMCID: PMC6341538 DOI: 10.1186/s12890-019-0781-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 01/07/2019] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND RGM medium is an agar-based, selective culture medium designed for the isolation of nontuberculous mycobacteria (NTM) from the sputum of patients with cystic fibrosis (CF). We evaluated RGM medium for the detection of NTM in patients with CF (405 samples), bronchiectasis (323 samples) and other lung diseases necessitating lung transplantation (274 samples). METHODS In total, 1002 respiratory samples from 676 patients were included in the study. Direct culture on RGM medium, with incubation at two temperatures (30 °C and 37 °C), was compared with conventional culture of decontaminated samples for acid-fast bacilli (AFB) using both a solid medium (Löwenstein-Jensen medium) and a liquid medium (the Mycobacterial Growth Indicator Tube; MGIT). RESULTS For all three patient groups, significantly more isolates of NTM were recovered using RGM medium incubated at 30 °C than by any other method (sensitivity: 94.6% vs. 22.4% for conventional AFB culture; P < 0.0001). Significantly more isolates of Mycobacterium abscessus complex were isolated on RGM at 30 °C than by AFB culture (sensitivity: 96.1% vs. 58.8%; P < 0.0001). The recovery of Mycobacterium avium complex was also greater using RGM medium at 30 °C compared to AFB culture (sensitivity: 83% vs. 70.2%), although this difference was not statistically significant and a combination of methods was necessary for optimal recovery (P = 0.21). CONCLUSIONS In the largest study of RGM medium to date, we reaffirm its utility for isolation of NTM from patients with CF. Furthermore; we show that it also provides an effective tool for culture of respiratory samples from patients with bronchiectasis and other lung diseases.
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Lee D, May K, Faramarzi B. Comparison of first and second acupuncture treatments in horses with chronic laminitis. IRANIAN JOURNAL OF VETERINARY RESEARCH 2019; 20:9-12. [PMID: 31191693 PMCID: PMC6509908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 11/01/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Laminitis is a common but critical disease that causes severe pain and disability in horses. The etiology and pathogenesis of laminitis remain inconclusive and a multimodal therapeutic approach is generally indicated. Acupuncture has been used as a treatment option; however, the required number of treatments is still controversial due to the lack of objective scientific evidence. AIMS The objective of this study was to determine if the response to a second acupuncture treatment differed from the response to the first acupuncture treatment in horses with chronic laminitis. METHODS Fourteen horses with chronic laminitis were identified. Acupuncture points were determined based on the results of a diagnostic acupuncture palpation examination. The second acupuncture treatment and lameness examination were conducted one week after the first treatment. Ten minutes after each acupuncture treatment, a lameness examination was performed and included an objective examination using a body-mounted inertial sensor system called "Lameness Locator" and a routine lameness examination following the "American Association of Equine Practitioners" (AAEP) lameness scale. The level of lameness was statistically analyzed using paired t-test and Wilcoxon signed rank test with p-values <0.05 considered significant. RESULTS Both objective (P=0.042) and routine lameness examinations (P=0.027) showed that the level of lameness significantly decreased after the second acupuncture treatment compared to the response to the first treatment. CONCLUSION The results of this study suggest that continued acupuncture treatments will result in increasing levels of pain relief, showing the advantage of performing more than one acupuncture treatment in horses with chronic laminitis.
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First MR, Peddi VR, Mannon R, Knight R, Marsh CL, Kurian SM, Rice JC, Maluf D, Mandelbrot D, Patel A, David J, Schieve C, Lee D, Lewis P, Friedewald JJ, Abecassis MM, Rose S. Investigator Assessment of the Utility of the TruGraf Molecular Diagnostic Test in Clinical Practice. Transplant Proc 2018; 51:729-733. [PMID: 30979457 DOI: 10.1016/j.transproceed.2018.10.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 09/14/2018] [Accepted: 10/30/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND TruGraf v1 is a well-validated DNA microarray-based test that analyzes blood gene expression profiles as an indicator of immune status in kidney transplant recipients with stable renal function. METHODS In this study, investigators assessed clinical utility of the TruGraf test in patient management. In a retrospective study, simultaneous blood tests and clinical assessments were performed in 192 patients at 7 transplant centers, and in a prospective observational study they were performed in 45 subjects at 5 transplant centers. RESULTS When queried regarding whether or not the TruGraf test result impacted their decision regarding patient management, in 168 of 192 (87.5%) cases the investigator responded affirmatively. The prospective study indicated that TruGraf results supported physicians' decisions on patient management 87% (39/45) of the time, and in 93% of cases physicians indicated that they would use serial TruGraf testing in future patient management. A total of 21 of 39 (54%) reported results confirmed their decision that no intervention was needed, and 17 of 39 (44%) reported that results specifically informed them that a decision not to perform a surveillance biopsy was correct. CONCLUSIONS TruGraf is the first and only noninvasive test to be evaluated for clinical utility in determining rejection status of patients with stable renal function and shows promise of providing support for clinical decisions to avoid unnecessary surveillance biopsies with a high degree of confidence. TruGraf is an invaluable addition to the transplant physician's tool kit for managing patient health by avoiding painful and invasive biopsies, reducing health care costs, and enabling frequent assessment of patients with stable renal function to confirm immune quiescence.
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Wang H, Lee D, Jung H, Kim I. PSIII-42 Effects of non-genetically modified organism wheat on growth performance, nutrient digestibility, blood profile and meat quality in grower-finisher pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Liu S, Cho J, Yun W, Lee C, Lee J, Kwak W, Oh H, Lee D. PSII-18 Effects of protein level and lysine: net energy ratio in growing-finishing pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lee J, Yun W, Kwak W, Lee C, Liu S, Oh H, An J, Lee D, Cho J. PSVII-3 Influence of Season of Birth, Gender and Paternal line in Pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yun W, Lee J, Lee C, Kwak W, Oh H, Liu S, Lee D, Cho J. PSV-1 Effects of dietary oils on nutrient digestibility in the growing pigs under heat stress condition. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Vardi Y, Lee D. From Image Deblurring to Optimal Investments: Maximum Likelihood Solutions for Positive Linear Inverse Problems. ACTA ACUST UNITED AC 2018. [DOI: 10.1111/j.2517-6161.1993.tb01925.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lee D, Chung B, Shi Y, Kim GY, Campbell N, Xue F, Song K, Choi SY, Podkaminer JP, Kim TH, Ryan PJ, Kim JW, Paudel TR, Kang JH, Spinuzzi JW, Tenne DA, Tsymbal EY, Rzchowski MS, Chen LQ, Lee J, Eom CB. Isostructural metal-insulator transition in VO2. Science 2018; 362:1037-1040. [DOI: 10.1126/science.aam9189] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 09/28/2017] [Accepted: 10/12/2018] [Indexed: 11/02/2022]
Abstract
The metal-insulator transition in correlated materials is usually coupled to a symmetry-lowering structural phase transition. This coupling not only complicates the understanding of the basic mechanism of this phenomenon but also limits the speed and endurance of prospective electronic devices. We demonstrate an isostructural, purely electronically driven metal-insulator transition in epitaxial heterostructures of an archetypal correlated material, vanadium dioxide. A combination of thin-film synthesis, structural and electrical characterizations, and theoretical modeling reveals that an interface interaction suppresses the electronic correlations without changing the crystal structure in this otherwise correlated insulator. This interaction stabilizes a nonequilibrium metallic phase and leads to an isostructural metal-insulator transition. This discovery will provide insights into phase transitions of correlated materials and may aid the design of device functionalities.
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Wang YN, Kreider W, Hunter C, Cunitz BW, Thiel J, Starr F, Dai JC, Nazari Y, Lee D, Williams JC, Bailey MR, Maxwell AD. An in vivo demonstration of efficacy and acute safety of burst wave lithotripsy using a porcine model. PROCEEDINGS OF MEETINGS ON ACOUSTICS. ACOUSTICAL SOCIETY OF AMERICA 2018; 35:020009. [PMID: 32612743 PMCID: PMC7329000 DOI: 10.1121/2.0000975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Burst wave lithotripsy (BWL) is a new non-invasive method for stone comminution using bursts of sub-megahertz ultrasound. A porcine model of urolithiasis and techniques to implement BWL treatment has been developed to evaluate its effectiveness and acute safety. Six human calcium oxalate monohydrate stones (6-7 mm) were hydrated, weighed, and surgically implanted into the kidneys of three pigs. Transcutaneous stone treatments were performed with a BWL transducer coupled to the skin via an external water bath. Stone targeting and treatment monitoring were performed with a co-aligned ultrasound imaging probe. Treatment exposures were applied in three 10-minute intervals for each stone. If sustained cavitation in the parenchyma was observed by ultrasound imaging feedback, treatment was paused and the pressure amplitude was decreased for the remaining time. Peak negative focal pressures between 6.5 and 7 MPa were applied for all treatments. After treatment, stone fragments were removed from the kidneys. At least 50% of each stone was reduced to <2 mm fragments. 100% of four stones were reduced to <4 mm fragments. Magnetic resonance imaging showed minimal injury to the functional renal volume. This study demonstrated that BWL could be used to effectively fragment kidney stones with minimal injury.
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Lee H, Choun S, Lee H, Kang S, Lee D, Aldwin C. MILITARY SERVICE AND LIFE SATISFACTION AMONG KOREAN VIETNAM WAR VETERANS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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140
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Lee D, Handorf E, Churilla T, Smaldone M, Hellstrom J, Waingankar N, Chen D, Hallman M, Sobczak M, Leachman B, Horwitz E. Acute and Subacute Complications of Brachytherapy for Prostate Cancer: A Single Institution Claims-Based Analysis. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lee H, Lee Y, Lee D, Hwang M, Lee H, Ley C. THE RELATIONSHIP BETWEEN ORAL HEALTH AND DEPRESSIVE SYMPTOMS IN LATER-LIFE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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142
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Kim D, Lee J, Lee D, Nam S, Han G. PROFILES OF SUCCESSFUL AGING AMONG KOREAN BABY BOOMER. Innov Aging 2018. [DOI: 10.1093/geroni/igy031.3617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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143
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Lee D, Gilligan M. INTERGENERATIONAL FINANCIAL SUPPORT AND LOW-INCOME OLDER ADULTS’ RETIREMENT DECISIONS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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144
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Ballard R, Lee D, Zielen S, Bullimore A, Skinner M. CONJUNCTIVAL PROVOCATION TESTING IN A DOSE FINDING STUDY WITH SUBCUTANEOUS IMMUNOTHERAPY WITH GRASS + MPL. Ann Allergy Asthma Immunol 2018. [DOI: 10.1016/j.anai.2018.09.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Velikova G, Williams LJ, Willis S, Dixon JM, Loncaster J, Hatton M, Clarke J, Kunkler IH, Russell NS, Alhasso A, Adamson D, Algurafi H, Allerton R, Anandadas C, Bahl A, Barraclough L, Barrett-Lee P, Barthakur U, Bedi C, Beresford M, Bishop J, Blackman G, Bliss P, Bloomfield D, Blunt M, Branson T, Brazil L, Brunt A, Chakrabarti A, Chittalie A, Churn M, Clarke J, Cleator S, Crellin P, Danwata F, De-Silva-Minor S, Dhadda A, Eicholz A, Fernando I, Forrest J, Fraser J, Geropantas K, Goodman A, Grieve R, Griffin M, Hadaki M, Hall A, Hatton M, Hicks J, Hignett S, Hogg M, Jyothirmayi R, Khan M, Kumar S, Lawton P, Lee D, Lewinski C, Lim C, Locke I, Loncaster J, Lumsden G, Lupton S, Magee B, Marshall J, Masinghe S, McGregor C, McLennan M, Memtsa P, Milanovic D, Misra V, Mithal N, Mukesh MB, Neal A, Needleman S, Persic M, Quigley M, Raj S, Riddle P, Ritchie D, Roberts F, Robson P, Roe H, Rolles M, Shah N, Sharma R, Sherwin E, Simmonds P, Skailles G, Skaria S, Soe W, Sripadam R, Stevens A, Stockdale A, Storey N, Storey N, Syndikus I, Thorp N, Thorp N, Upadhyay S, Varughese M, Walji N, Welch R, Wells T, Wolstenholme V, Wolstenholme V, Woodings P, Yuille F. Quality of life after postmastectomy radiotherapy in patients with intermediate-risk breast cancer (SUPREMO): 2-year follow-up results of a randomised controlled trial. Lancet Oncol 2018; 19:1516-1529. [DOI: 10.1016/s1470-2045(18)30515-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 11/12/2022]
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Donio P, Freitas C, Austin P, Ross H, Abdel-Qadir H, Wijeysundera H, Tu K, Cram P, Liu P, Abrams H, Udell J, Mak S, Farkouh M, Tu J, Wang X, Tobe S, Lee D. COMPARISON OF READMISSION AND DEATH AMONG CARDIAC PATIENTS IN NORTHERN VS. SOUTHERN ONTARIO. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Kato T, Jin C, Ujiie H, Fujino K, Lee D, Wada H, Hu H, Wu L, Weersink R, Chen J, Kanno H, Hatanaka Y, Hatanaka K, Matsuno Y, De Perrot M, Wilson B, Zheng G, Yasufuku K. MA12.09 Preclinical Investigations of Folate Receptor Targeted Nanoparticles for Photodynamic Therapy of Malignant Pleural Mesothelioma. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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148
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Kim K, Kang S, Kim W, Park C, Lee D, Cho H, Kang W, Park S, Kim G, Lim H, Lee H, Park J, Jeon D, Lim Y, Woo T, Oh J. A new software scheme for scatter correction based on a simple radiographic scattering model. Med Biol Eng Comput 2018; 57:489-503. [PMID: 30232700 DOI: 10.1007/s11517-018-1893-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 09/03/2018] [Indexed: 11/29/2022]
Abstract
In common radiography, image contrast is often limited due mainly to scattered x-rays and noise, decreasing the quantitative usefulness of x-ray images. Several scatter reduction methods based on software correction schemes have been extensively investigated in an attempt to overcome these difficulties, most of which are based on measurement, mathematical-physical modeling, or a combination of both. However, those methods require special equipment, system geometry, and extra manual work to measure scatter characteristics. In this study, we investigated a new software scheme for scatter correction based on a simple radiographic scattering model where the intensity of the scattered x-rays was directly estimated from a single x-ray image using a weighted l1-norm contextual regularization framework. We implemented the proposed algorithm and performed a systematic simulation and experiment to demonstrate its viability. We also conducted some clinical image studies using patient's image data of breast and L-spine to verify the clinical effectiveness of the proposed scheme. Our results indicate that the degradation of image characteristics by scattered x-rays and noise was effectively recovered by using the proposed software scheme, thus improving radiographic visibility considerably. Graphical abstract The schematic illustrations of scatter suppression methods by using a an antiscatter grid and b a scatter estimation algorithm.
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Shah A, Lee D, Song M, Kim S, Kang MK, Kim RH. Clastic cells are absent around the root surface in pulp-exposed periapical periodontitis lesions in mice. Oral Dis 2018; 24:57-62. [PMID: 29480630 DOI: 10.1111/odi.12824] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/15/2017] [Accepted: 12/15/2017] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Clastic cells, originating from the monocyte-macrophage lineage, resorb mineralized tissues. In periapical periodontitis, alveolar bone around the tooth apex becomes resorbed; however, the roots of the teeth are often left intact by yet unknown mechanisms. Here, we examined the status of clastic cells in a periapical periodontitis model in mice. METHODS Periapical periodontitis was induced by performing pulp exposure on the maxillary first molar. The contralateral maxillary first molar was used as a control. The maxillae were harvested, fixed, and subjected to μCT scanning and three-dimensional volumetric analysis. TRAP staining was performed, and osteoclasts were quantified. Immunohistochemical staining was performed for RANKL, OPG, and F4/80, a marker for macrophages. RESULTS At the apex of the tooth, pulp exposure resulted in periapical radiolucency with mineralized tissues at the surrounding bone surfaces but not on the root surfaces. Histologically, clastic cells were present on the bone surfaces but absent around the root surfaces. Expression of F4/80 and RANKL was not found at close proximity to the root surfaces, but OPG was globally expressed. CONCLUSION The absence of clastic cells around the root surface of pulp-exposed teeth, in part, is associated with the lack of macrophages and RANKL expression.
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Zelinski M, Ting A, Bishop C, Lawson M, Liang L, Hobbs T, Jacob D, Lee D. Vitrified macaque ovarian cortical tissue transplanted to heterotopic sites produces fertilizable oocytes. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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