PMID- 29891998 OWN - NLM STAT- MEDLINE DCOM- 20191010 LR - 20191010 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 8 IP - 1 DP - 2018 Jun 11 TI - Association of Inflammatory Responses and ECM Disorganization with HMGB1 Upregulation and NLRP3 Inflammasome Activation in the Injured Rotator Cuff Tendon. PG - 8918 LID - 10.1038/s41598-018-27250-2 [doi] LID - 8918 AB - Inflammation and extracellular matrix (ECM) disorganization following the rotator cuff tendon injuries (RCTI) delay the repair and healing process and the molecular mechanisms underlying RCTI pathology are largely unknown. Here, we examined the role of HMGB1 and NLRP3 inflammasome pathway in the inflammation and ECM disorganization in RCTI. This hypothesis was tested in a tenotomy-RCTI rat model by transecting the RC tendon from the humerus. H&E and pentachrome staining revealed significant changes in the morphology, architecture and ECM organization in RC tendon tissues following RCTI when compared with contralateral control. Severity of the injury was high in the first two weeks with improvement in 3-4 weeks following RCTI, and this correlated with the healing response. The expression of proteins associated with increased HMGB-1 and upregulation of NLRP3 inflammasome pathway, TLR4, TLR2, TREM-1, RAGE, ASC, Caspase-1, and IL-1beta, in the first two weeks following RCTI followed by decline in 3-4 weeks. These results suggest the association of inflammatory responses and ECM disorganization with HMGB1 upregulation and NLRP3 inflammasome activation in the RC tendons and could provide novel target(s) for development of better therapeutic strategies in the management of RCTI. FAU - Thankam, Finosh G AU - Thankam FG AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Roesch, Zachary K AU - Roesch ZK AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Dilisio, Matthew F AU - Dilisio MF AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Radwan, Mohamed M AU - Radwan MM AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Kovilam, Anuradha AU - Kovilam A AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Gross, R Michael AU - Gross RM AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. FAU - Agrawal, Devendra K AU - Agrawal DK AUID- ORCID: 0000-0001-5445-0013 AD - Departments of Clinical & Translational Science and Orthopedic Surgery, Creighton University School of Medicine, Omaha, NE, 68178, USA. dkagr@creighton.edu. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180611 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (HMGB1 Protein) RN - 0 (Hbp1 protein, rat) RN - 0 (Inflammasomes) RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - 0 (Nlrp3 protein, rat) SB - IM MH - Animals MH - Disease Models, Animal MH - Extracellular Matrix/*metabolism MH - HMGB1 Protein/*metabolism MH - Histocytochemistry MH - Inflammasomes/*metabolism MH - Inflammation/*pathology MH - Male MH - Microscopy, Fluorescence MH - NLR Family, Pyrin Domain-Containing 3 Protein/*metabolism MH - Rats, Sprague-Dawley MH - Rotator Cuff Injuries/*pathology PMC - PMC5995925 COIS- The authors declare no competing interests. EDAT- 2018/06/13 06:00 MHDA- 2019/10/11 06:00 PMCR- 2018/06/11 CRDT- 2018/06/13 06:00 PHST- 2018/03/01 00:00 [received] PHST- 2018/05/31 00:00 [accepted] PHST- 2018/06/13 06:00 [entrez] PHST- 2018/06/13 06:00 [pubmed] PHST- 2019/10/11 06:00 [medline] PHST- 2018/06/11 00:00 [pmc-release] AID - 10.1038/s41598-018-27250-2 [pii] AID - 27250 [pii] AID - 10.1038/s41598-018-27250-2 [doi] PST - epublish SO - Sci Rep. 2018 Jun 11;8(1):8918. doi: 10.1038/s41598-018-27250-2.