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Sun C, Chang K, Fleming BC, Owens BD, Beveridge JE, Gage A, Talley-Bruns RC, McAllister S, Costa MQ, Pinette MP, Hague M, Molino J, Xiao Y, Lu S, Wei L. A novel large animal model of posttraumatic osteoarthritis induced by inflammation with mechanical stability. Am J Transl Res 2023; 15:4573-4586. [PMID: 37560216 PMCID: PMC10408525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 06/07/2023] [Indexed: 08/11/2023]
Abstract
OBJECTIVES Animal models are needed to reliably separate the effects of mechanical joint instability and inflammation on posttraumatic osteoarthritis (PTOA) pathogenesis. We hypothesized that our modified intra-articular drilling (mIAD) procedure induces cartilage damage and synovial changes through increased inflammation without causing changes in gait. METHODS Twenty-four Yucatan minipigs were randomized into the mIAD (n=12) or sham control group (n=12). mIAD animals had two osseous tunnels drilled into each of the tibia and femur adjacent to the anterior cruciate ligament (ACL) attachment sites on the left hind knee. Surgical and contralateral limbs were harvested 15 weeks post-surgery. Cartilage degeneration was evaluated macroscopically and histologically. Synovial changes were evaluated histologically. Interleukin-1 beta (IL-1β), nuclear factor kappa B (NF-κB), and tumor necrosis factor alpha (TNF-α) mRNA expression levels in the synovial membrane were measured using quantitative real-time polymerase chain reaction. IL-1β and NF-κB levels in chondrocytes were assessed using immunohistochemistry. Load asymmetry during gait was recorded by a pressure-sensing walkway system before and after surgery. RESULTS The mIAD surgical knees demonstrated greater gross and histological cartilage damage than contralateral (P<.01) and sham knees (P<.05). Synovitis was present only in the mIAD surgical knee. Synovial inflammatory marker (IL-1β, NF-κB, and TNF-α) expression was three times higher in the mIAD surgical knee than the contralateral (P<.05). Chondrocyte IL-1β and NF-κB levels were highest in the mIAD surgical knee. In general, there were no significant changes in gait. CONCLUSIONS The mIAD model induced PTOA through inflammation without affecting gait mechanics. This large animal model has significant applications for evaluating the role of inflammation in PTOA and for developing therapies aimed at reducing inflammation following joint injury.
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Affiliation(s)
- Changqi Sun
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Kenny Chang
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Braden C Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Brett D Owens
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | | | - Andrew Gage
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Rachel C Talley-Bruns
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Scott McAllister
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Meggin Q Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Megan P Pinette
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Madalyn Hague
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Janine Molino
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Ying Xiao
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Shaolei Lu
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Lei Wei
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
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Zandiyeh P, Parola LR, Costa MQ, Hague MJ, Molino J, Fleming BC, Beveridge JE. Long-Term Bilateral Neuromuscular Function and Knee Osteoarthritis after Anterior Cruciate Ligament Reconstruction. Bioengineering (Basel) 2023; 10:812. [PMID: 37508839 PMCID: PMC10376226 DOI: 10.3390/bioengineering10070812] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Neuromuscular function is thought to contribute to posttraumatic osteoarthritis (PTOA) risk in anterior cruciate ligament (ACL)-reconstructed (ACLR) patients, but sensitive and easy-to-use tools are needed to discern whether complex muscle activation strategies are beneficial or maladaptive. Using an electromyography (EMG) signal analysis technique coupled with a machine learning approach, we sought to: (1) identify whether ACLR muscle activity patterns differed from those of healthy controls, and (2) explore which combination of patient outcome measures (thigh muscle girth, knee laxity, hop distance, and activity level) predicted the extent of osteoarthritic changes via magnetic resonance imaging (MRI) in ACLR patients. Eleven ACLR patients 10-15 years post-surgery and 12 healthy controls performed a hop activity while lower limb muscle EMG was recorded bilaterally. Osteoarthritis was evaluated based on MRI. ACLR muscle activity patterns were bilaterally symmetrical and differed from those of healthy controls, suggesting the presence of a global adaptation strategy. Smaller ipsilateral thigh muscle girth was the strongest predictor of inferior MRI scores. The ability of our EMG analysis approach to detect meaningful neuromuscular differences that could ultimately be related to thigh muscle girth provides the foundation to further investigate a direct link between muscle activation patterns and PTOA risk.
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Affiliation(s)
- Payam Zandiyeh
- Department of Orthopaedic Surgery, University of Texas Health Sciences Center at Houston, Houston, TX 77030, USA;
| | - Lauren R. Parola
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Meggin Q. Costa
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Madalyn J. Hague
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Janine Molino
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
- Lifespan Biostatistics, Epidemiology, Research Design, & Informatics Core, Rhode Island Hospital, Providence, RI 02903, USA
| | - Braden C. Fleming
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Jillian E. Beveridge
- Department of Orthopaedics, Rhode Island Hospital/Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
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Flannery SW, Barnes DA, Costa MQ, Menghini D, Kiapour AM, Walsh EG, Kramer DE, Murray MM, Fleming BC. Automated segmentation of the healed anterior cruciate ligament from T 2 * relaxometry MRI scans. J Orthop Res 2023; 41:649-656. [PMID: 35634860 PMCID: PMC9708947 DOI: 10.1002/jor.25390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 05/16/2022] [Accepted: 05/26/2022] [Indexed: 02/04/2023]
Abstract
Collagen organization of the anterior cruciate ligament (ACL) can be evaluated using T2 * relaxometry. However, T2 * mapping requires manual image segmentation, which is a time-consuming process and prone to inter- and intra- segmenter variability. Automating segmentation would address these challenges. A model previously trained using Constructive Interference in Steady State (CISS) scans was applied to T2 * segmentation via transfer learning. It was hypothesized that there would be no significant differences in the model's segmentation performance between T2 * and CISS, structural measures versus ground truth manual segmentation, and reliability versus independent and retest manual segmentation. Transfer learning was conducted using 54 T2 * scans of the ACL. Segmentation performance was assessed with Dice coefficient, precision, and sensitivity, and structurally with T2 * value, volume, subvolume proportions, and cross-sectional area. Model performance relative to independent manual segmentation and repeated segmentation by the ground truth segmenter (retest) were evaluated on a random subset. Segmentation performance was analyzed with Mann-Whitney U tests, structural measures with Wilcoxon signed-rank tests, and performance relative to manual segmentation with repeated-measures analysis of variance/Tukey tests (α = 0.05). T2 * segmentation performance was not significantly different from CISS on all measures (p > 0.35). No significant differences were detected in structural measures (p > 0.50). Automatic segmentation performed as well as the retest on all segmentation measures, whereas independent segmentations were lower than retest and/or automatic segmentation (p < 0.023). Structural measures were not significantly different between segmenters. The automatic segmentation model performed as well on the T2 * sequence as on CISS and outperformed independent manual segmentation while performing as well as retest segmentation.
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Affiliation(s)
- Sean W. Flannery
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Dominique A. Barnes
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Meggin Q. Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Danilo Menghini
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Ata M. Kiapour
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Edward G. Walsh
- Department of Neuroscience, Division of Biology and Medicine, Brown University, Providence, RI, USA
| | - Dennis E. Kramer
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Martha M. Murray
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
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Flannery SW, Walsh EG, Sanborn RM, Chrostek CA, Costa MQ, Kaushal SG, Murray MM, Fleming BC, Kiapour AM. Reproducibility and postacquisition correction methods for quantitative magnetic resonance imaging of the anterior cruciate ligament (ACL). J Orthop Res 2022; 40:2908-2913. [PMID: 35266588 PMCID: PMC9463398 DOI: 10.1002/jor.25319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/15/2022] [Accepted: 03/01/2022] [Indexed: 02/04/2023]
Abstract
Quantitative magnetic resonance imaging has been used to evaluate the structural integrity of knee joint structures. However, variations in acquisition parameters between scanners pose significant challenges. Understanding the effect of small differences in acquisition parameters for quantitative sequences is vital to the validity of cross-institutional studies, and for the harmonization of large, heterogeneous datasets to train machine learning models. The study objective was to assess the reproducibility of T2 * relaxometry and the constructive interference in steady-state sequence (CISS) across scanners, with minimal hardware-necessitated changes to acquisition parameters. It was hypothesized that there would be no significant differences between scanners in anterior cruciate ligament T2 * relaxation times and CISS signal intensities (SI). Secondarily, it was hypothesized that differences could be corrected by rescaling the SI distribution to harmonize between scanners. Seven volunteers were scanned on 3T Prisma and Tim Trio scanners (Siemens). Three correction methods were evaluated for T2 *: inverse echo time scaling, z-scoring, and Nyúl histogram matching. For CISS, scans were normalized to cortical bone, scaled by the background noise ratio, and log-transformed. Before correction, significant mean differences of 6.0 ± 3.2 ms (71.8%; p = 0.02) and 0.49 ± 0.15 units (40.7%; p = 0.02) for T2 * and CISS across scanners were observed, respectively. After rescaling, T2 * differences decreased to 2.6 ± 2.7 ms (23.9%; p = 0.03), 1.3 ± 2.5 ms (10.9%; p = 0.13), and 1.27 ± 3.0 ms (19.6%; p = 0.40) for inverse echo time, z-scoring, and Nyúl, respectively, while CISS decreased to 0.01 ± 0.11 units (4.0%; p = 0.87). These findings suggest that small acquisition parameter differences may lead to large changes in T2 * and SI values that must be reconciled to compare data across magnets.
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Affiliation(s)
- Sean W. Flannery
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Edward G. Walsh
- Department of Neuroscience, Division of Biology and Medicine, Brown University, Providence, RI, USA
| | - Ryan M. Sanborn
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Cynthia A. Chrostek
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Meggin Q. Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Shankar G. Kaushal
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Martha M. Murray
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Ata M. Kiapour
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
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Parola LR, Pinette MP, Proffen BL, Sant NJ, Karamchedu NP, Costa MQ, Molino J, Fleming BC, Murray MM. Hydrogel treatment for idiopathic osteoarthritis in a Dunkin Hartley Guinea pig model. PLoS One 2022; 17:e0278338. [PMID: 36449506 PMCID: PMC9710799 DOI: 10.1371/journal.pone.0278338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 10/13/2022] [Indexed: 12/02/2022] Open
Abstract
The study objective was to determine if intraarticular injections of an extracellular matrix (ECM) powder and blood composite (ECM-B) would have a significant impact on post-operative gait parameters without eliciting adverse cartilage changes or severe lymphatic reactions in an idiopathic osteoarthritis (OA) model. Twenty-one Dunkin Hartley Guinea pigs received an intraarticular injection of ECM-B in each knee and were split into sub-groups for gait assessment and post-harvest knee evaluations at 1 week (n = 5), 2 weeks (n = 5), 4 weeks (n = 5), or 8 weeks (n = 6). The results were compared with a control group (n = 5), which underwent bilateral injections of phosphate-buffered saline (PBS), gait measurements at 1, 2, 4, and 8 weeks, and post-mortem knee evaluation at 8 weeks post-injection. Hind limbs and popliteal lymph nodes were collected at the Week 8 endpoint and underwent histological analysis by a veterinary pathologist. Significant improvement in hind limb base of support was observed in the ECM-B group compared to the control group at Week 4 but was no longer significant by Week 8. No significant differences were observed between control and ECM-B groups in hind limb cartilage, synovium, or popliteal lymph node histology at Week 8. In conclusion, administration of an ECM-B material may improve gait for a limited time without significant adverse effects on the cartilage, synovium, or local lymph nodes.
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Affiliation(s)
- Lauren R. Parola
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
| | - Megan P. Pinette
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
| | - Benedikt L. Proffen
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
| | - Nicholas J. Sant
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
| | - N. Padmini Karamchedu
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
| | - Meggin Q. Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
| | - Janine Molino
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/ Rhode Island Hospital, Providence, RI, United States of America
- * E-mail:
| | - Martha M. Murray
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
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Costa MQ, Badger GJ, Chrostek CA, Carvalho OD, Faiola SL, Fadale PD, Hulstyn MJ, Gil HC, Shalvoy RM, Fleming BC. Effects of Initial Graft Tension and Patient Sex on Knee Osteoarthritis Outcomes After ACL Reconstruction: A Randomized Controlled Clinical Trial With 10- to 12-Year Follow-up. Am J Sports Med 2022; 50:3510-3521. [PMID: 36259724 PMCID: PMC9633422 DOI: 10.1177/03635465221124917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The initial graft tension applied during anterior cruciate ligament (ACL) graft fixation may promote posttraumatic osteoarthritis (PTOA). PURPOSE/HYPOTHESIS This study sought to assess the effect of initial graft tension and patient sex on PTOA outcomes at 10 to 12 years after ACL reconstruction (ACLR). The hypothesis was that there would be no group- or sex-based differences in outcomes. STUDY DESIGN Randomized controlled trial; Level of evidence, 1. METHODS Patients were randomized to receive ACLR with a low or high initial graft tension. Outcomes were evaluated at 10 to 12 years postoperatively and compared with a matched, uninjured control group. Outcomes included clinical assessments (anteroposterior [AP] knee laxity measurement, International Knee Documentation Committee [IKDC] examination score), a functional assessment (single-leg hop for distance), patient-reported outcomes (Knee injury and Osteoarthritis Outcome Score [KOOS], 36-Item Short Form Health Survey, Tegner activity level, patient satisfaction), and PTOA imaging (Osteoarthritis Research Society International [OARSI] radiographic score and Whole-Organ Magnetic Resonance Imaging Score [WORMS]). Two-way mixed-model analyses of variance were used to evaluate differences in outcomes between tension groups and the control group and between female and male patients. RESULTS Both tension groups scored worse than the control group for the IKDC examination (P≤ .021), KOOS (Pain, Activities of Daily Living, Sport/Recreation, and Quality of Life subscales) (P≤ .049), and WORMS difference score (P≤ .042). The low-tension group scored worse than the control group for KOOS Symptoms (P = .016) and the OARSI difference score (P = .015). The index limb had worse scores than the contralateral limb within the high-tension group for AP laxity (P = .030) and hop deficit (P = .011). This result was also observed within both tension groups for the WORMS (P≤ .050) and within the low-tension group for the OARSI score (P = .001). Male patients had higher Tegner scores (mean ± SE) relative to female patients (male, 5.49 ± 1.88; female, 4.45 ± 1.65) and worse OARSI difference scores (male, 1.89 ± 5.38; female, 0.244 ± 0.668) (P = .007 and .034, respectively). However, no significant differences were detected between tension groups for any of the outcomes measured. CONCLUSION Overall, ACLR failed to prevent PTOA regardless of initial graft tension. However, male patients treated with a low initial graft tension may be at greater risk for PTOA. These results do not support the hypothesis of no sex differences in outcomes at 10 to 12 years after ACLR.
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Affiliation(s)
- Meggin Q. Costa
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Gary J. Badger
- Dept of Medical Biostatistics, University of Vermont, Burlington, VT
| | - Cynthia A. Chrostek
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Orianna D. Carvalho
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Stacy L. Faiola
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Paul D. Fadale
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Michael J. Hulstyn
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Holly C. Gil
- Dept of Diagnostic Imaging, Brown University/Rhode Island Hospital, Providence, RI
| | - Robert M. Shalvoy
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
| | - Braden C. Fleming
- Dept of Orthopaedics, Brown University/Rhode Island Hospital, Providence, RI
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Goodwin MD, Costa MQ, Robinson JR, Kotyk CM. Mechanochemical synthesis of thiolactams and other thioamides using Lawesson’s reagent. Results in Chemistry 2022. [DOI: 10.1016/j.rechem.2022.100528] [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: 10/14/2022] Open
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Costa MQ, Murray MM, Sieker JT, Karamchedu NP, Proffen BL, Fleming BC. Peripheral shift in the viable chondrocyte population of the medial femoral condyle after anterior cruciate ligament injury in the porcine knee. PLoS One 2021; 16:e0256765. [PMID: 34437631 PMCID: PMC8389427 DOI: 10.1371/journal.pone.0256765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 08/15/2021] [Indexed: 11/21/2022] Open
Abstract
Anterior cruciate ligament injuries result in posttraumatic osteoarthritis in the medial compartment of the knee, even after surgical treatment. How the chondrocyte distribution within the articular cartilage changes early in this process is currently unknown. The study objective was to investigate the chondrocyte distribution within the medial femoral condyle after an anterior cruciate ligament transection in a preclinical model. Forty-two adolescent Yucatan minipigs were allocated to receive unilateral anterior cruciate ligament surgery (n = 36) or no surgery (n = 6). Central coronal sections of the medial femoral condyle were obtained at 1- and 4 weeks after surgery, and the chondrocyte distribution was measured via whole slide imaging and a cell counting batch processing tool utilized in ImageJ. Ki-67 immunohistochemistry was performed to identify proliferating cells. Empty lacunae, karyolysis, karyorrhexis, and pyknosis were used to identify areas of irreversible cell injury. The mean area of irreversible cell injury was 0% in the intact controls, 13.4% (95% confidence interval: 6.4, 20.3) at 1-week post-injury and 19.3% (9.7, 28.9) at 4 weeks post-injury (p < .015). These areas occurred closest to the femoral intra-articular notch. The remaining areas containing viable chondrocytes had Ki-67-positive cells (p < .02) and increased cell density in the middle (p < .03) and deep zones (p = .001). For the entire section, the total chondrocyte number did not change significantly post-operatively; however, the density of cells in the peripheral regions of the medial femoral condyle increased significantly at 1- and 4 weeks post-injury relative to the intact control groups (p = .032 and .004, respectively). These data demonstrate a peripheral shift in the viable chondrocyte population of the medial femoral condyle after anterior cruciate ligament injury and further suggest that chondrocytes with the capacity to proliferate are not confined to one particular cartilage layer.
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Affiliation(s)
- Meggin Q. Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, United States of America
| | - Martha M. Murray
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
| | - Jakob T. Sieker
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
| | - Naga Padmini Karamchedu
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, United States of America
| | - Benedikt L. Proffen
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States of America
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, United States of America
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Karamchedu NP, Fleming BC, Donnenfield JI, Proffen BL, Costa MQ, Molino J, Murray MM. Enrichment of inflammatory mediators in the synovial fluid is associated with slower progression of mild to moderate osteoarthritis in the porcine knee. Am J Transl Res 2021; 13:7667-7676. [PMID: 34377243 PMCID: PMC8340255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
The roles that cytokines and matrix metalloproteinases play in the onset and progression of posttraumatic osteoarthritis (PTOA) remain a topic of debate. The study objective was to evaluate the concentrations of these inflammatory mediators during the development of mild to moderate PTOA in the porcine anterior cruciate ligament (ACL) surgical model. We hypothesized that there would be more animals with detectable mediators in the pigs that develop moderate PTOA (those receiving ACL reconstruction or untreated ACL transection) compared to those that develop mild PTOA (those receiving scaffold-enhanced ACL repair). 36 Yucatan minipigs underwent ACL transection and were randomized to: 1) no further treatment, 2) ACL reconstruction, or 3) scaffold-enhanced ACL repair. Synovial fluid samples were obtained pre-operatively, and at 1, 4, 12, 26 and 52 weeks post-operatively. The concentrations of inflammatory mediator in the synovial fluid samples were evaluated via multiplex assay. Macroscopic cartilage assessments were performed following euthanasia at 52 weeks. As found in prior studies, the repair group had significantly less cartilage damage than either the ACL transected or ACL reconstruction groups (P<.03). The presence and concentrations of the biomarkers were influenced by surgical group and time. In general, the concentrations of inflammatory mediators were higher in the repair group, which exhibited less cartilage damage than the other two treatment groups. While this finding disproved the hypotheses, these data suggest that the metabolic activity of the joints exhibiting less cartilage damage remained higher over the 52-week period than those that did not.
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Affiliation(s)
- Naga Padmini Karamchedu
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Braden C Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Jonah I Donnenfield
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Benedikt L Proffen
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Meggin Q Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Janine Molino
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island HospitalProvidence, RI, USA
| | - Martha M Murray
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical SchoolBoston, MA, USA
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Karamchedu NP, Murray MM, Sieker JT, Proffen BL, Portilla G, Costa MQ, Molino J, Fleming BC. Bridge-Enhanced Anterior Cruciate Ligament Repair Leads to Greater Limb Asymmetry and Less Cartilage Damage Than Untreated ACL Transection or ACL Reconstruction in the Porcine Model. Am J Sports Med 2021; 49:667-674. [PMID: 33534613 PMCID: PMC8099149 DOI: 10.1177/0363546521989265] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The extent of posttraumatic osteoarthritis (PTOA) in the porcine anterior cruciate ligament (ACL) transection model is dependent on the surgical treatment selected. In a previous study, animals treated with bridge-enhanced ACL repair using a tissue-engineered implant developed less PTOA than those treated with ACL reconstruction (ACLR). Alterations in gait, including asymmetric weightbearing and shorter stance times, have been noted in clinical studies of subjects with osteoarthritis. HYPOTHESIS Animals receiving a surgical treatment that results in less PTOA (ie, bridge-enhanced ACL repair) would exhibit fewer longitudinal postoperative gait asymmetries over a 1-year period when compared with treatments that result in greater PTOA (ie, ACLR and ACL transection). STUDY DESIGN Controlled laboratory study. METHODS Thirty-six Yucatan minipigs underwent ACL transection and were randomized to receive (1) no further treatment, (2) ACLR, or (3) bridge-enhanced ACL repair. Gait analyses were performed preoperatively, and at 4, 12, 26, and 52 weeks postoperatively. Macroscopic cartilage assessments were performed at 52 weeks. RESULTS Knees treated with bridge-enhanced ACL repair had less macroscopic damage in the medial tibial plateau than those treated with ACLR or ACL transection (adjusted P = .03 for both comparisons). The knees treated with bridge-enhanced ACL repair had greater asymmetry in hindlimb maximum force and impulse loading at 52 weeks than the knees treated with ACL transection (adjusted P < .05 for both comparisons). Although not significant, there was a trend that knees treated with bridge-enhanced ACL repair had greater asymmetry in hindlimb maximum force and impulse loading (adjusted P < .10 for both comparisons) compared with ACLR. CONCLUSION Contrary to our hypothesis, the surgical treatment resulting in less macroscopic cartilage damage (ie, bridge-enhanced ACL repair) exhibited greater asymmetry in load-related gait parameters than the other surgical groups. This finding suggests that increased offloading of the surgical knee may be associated with a slower rate of PTOA development. CLINICAL RELEVANCE Less cartilage damage at 52 weeks was found in the surgical group that continued to protect the limb from full body weight during gait. This finding suggests that protection of the knee from maximum stresses may be important in minimizing the development of PTOA in the ACL-injured knee within 1 year.
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Affiliation(s)
- Naga Padmini Karamchedu
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Martha M. Murray
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Jakob T. Sieker
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Benedikt L. Proffen
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Gabriela Portilla
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Meggin Q. Costa
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Janine Molino
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, USA
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