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Diekman BO, Loeser RF. Aging and the emerging role of cellular senescence in osteoarthritis. Osteoarthritis Cartilage 2024; 32:365-371. [PMID: 38049031 PMCID: PMC10984800 DOI: 10.1016/j.joca.2023.11.018] [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: 09/22/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 12/06/2023]
Abstract
OBJECTIVE The correlation between age and incidence of osteoarthritis (OA) is well known but the causal mechanisms involved are not completely understood. This narrative review summarizes selected key findings from the past 30 years that have elucidated key aspects of the relationship between aging and OA. METHODS The peer-reviewed English language literature was searched on PubMed using keywords including senescence, aging, cartilage, and osteoarthritis, for original studies and reviews published from 1993 to 2023 with a major focus on more recent studies. Manuscripts most relevant to aging and OA that examined one or more of the hallmarks of aging were selected for further review. RESULTS All proposed hallmarks of aging have been observed in articular cartilage and some have also been described in other joint tissues. Hallmarks include genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, altered intercellular communication, disabled macroautophagy, chronic inflammation, and dysbiosis. There is evidence that these age-related changes contribute to the development of OA in part by promoting cellular senescence. Senescence may therefore serve as a downstream mediator that connects numerous aging hallmarks to OA, likely through the senescence-associated secretory phenotype that is characterized by increased production of proinflammatory cytokines and matrix metalloproteinases. CONCLUSIONS Progress over the past 30 years has provided the foundation for emerging therapies, such as senolytics and senomorphics, that hold promise for OA disease modification. Mechanistic studies utilizing physiologically-aged animals and cadaveric human joint tissues will be important for continued progress.
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Affiliation(s)
- Brian O Diekman
- Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA; Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, 27599, USA.
| | - Richard F Loeser
- Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA; Division of Rheumatology, Allergy, and Immunology, University of North Carolina, Chapel Hill, NC, 27599, USA.
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Izda V, Schlupp L, Prinz E, Dyson G, Barrett M, Dunn CM, Nguyen E, Sturdy C, Jeffries MA. Murine cartilage microbial DNA deposition occurs rapidly following the introduction of a gut microbiome and changes with obesity, aging, and knee osteoarthritis. GeroScience 2024; 46:2317-2341. [PMID: 37946009 PMCID: PMC10828335 DOI: 10.1007/s11357-023-01004-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023] Open
Abstract
Cartilage microbial DNA patterns have been recently characterized in osteoarthritis (OA). The objectives of this study were to evaluate the gut origins of cartilage microbial DNA, to characterize cartilage microbial changes with age, obesity, and OA in mice, and correlate these to gut microbiome changes. We used 16S rRNA sequencing performed longitudinally on articular knee cartilage from germ-free (GF) mice following oral microbiome inoculation and cartilage and cecal samples from young and old wild-type mice with/without high-fat diet-induced obesity (HFD) and with/without OA induced by destabilization of the medial meniscus (DMM) to evaluate gut and cartilage microbiota. Microbial diversity was assessed, groups compared, and functional metagenomic profiles reconstructed. Findings were confirmed in an independent cohort by clade-specific qPCR. We found that cartilage microbial patterns developed at 48 h and later timepoints following oral microbiome inoculation of GF mice. Alpha diversity was increased in SPF mouse cartilage samples with age (P = 0.013), HFD (P = 5.6E-4), and OA (P = 0.029) but decreased in cecal samples with age (P = 0.014) and HFD (P = 1.5E-9). Numerous clades were altered with aging, HFD, and OA, including increases in Verrucomicrobia in both cartilage and cecal samples. Functional analysis suggested changes in dihydroorotase, glutamate-5-semialdehyde dehydrogenase, glutamate-5-kinase, and phosphoribosylamine-glycine ligase, in both cecum and cartilage, with aging, HFD, and OA. In conclusion, cartilage microbial DNA patterns develop rapidly after the introduction of a gut microbiome and change in concert with the gut microbiome during aging, HFD, and OA in mice. DMM-induced OA causes shifts in both cartilage and cecal microbiome patterns independent of other factors.
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Affiliation(s)
- Vladislav Izda
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
- Icahn School of Medicine, Mt. Sinai, New York, NY, USA
| | - Leoni Schlupp
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Emmaline Prinz
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Gabby Dyson
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Montana Barrett
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Christopher M Dunn
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
- Department of Internal Medicine, Division of Rheumatology, Immunology, and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Emily Nguyen
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Cassandra Sturdy
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
| | - Matlock A Jeffries
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA.
- Department of Internal Medicine, Division of Rheumatology, Immunology, and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- VA Medical Center, Oklahoma City, OK, USA.
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Holub MN, Wahhab A, Rouse JR, Danner R, Hackner LG, Duris CB, McClune ME, Dressler JM, Strle K, Jutras BL, Edelstein AI, Lochhead RB. Peptidoglycan in osteoarthritis synovial tissue is associated with joint inflammation. Arthritis Res Ther 2024; 26:77. [PMID: 38532447 PMCID: PMC10967045 DOI: 10.1186/s13075-024-03293-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 02/22/2024] [Indexed: 03/28/2024] Open
Abstract
OBJECTIVES Peptidoglycan (PG) is an arthritogenic bacterial cell wall component whose role in human osteoarthritis is poorly understood. The purpose of this study was to determine if PG is present in synovial tissue of osteoarthritis patients at the time of primary total knee arthroplasty (TKA), and if its presence is associated with inflammation and patient reported outcomes. METHODS Intraoperative synovial tissue and synovial fluid samples were obtained from 56 patients undergoing primary TKA, none of whom had history of infection. PG in synovial tissue was detected by immunohistochemistry (IHC) and immunofluorescence microscopy (IFM). Synovial tissue inflammation and fibrosis were assessed by histopathology and synovial fluid cytokine quantification. Primary human fibroblasts isolated from arthritis synovial tissue were stimulated with PG to determine inflammatory cytokine response. RESULTS A total of 33/56 (59%) of primary TKA synovial tissue samples were positive for PG by IHC, and PG staining colocalized with markers of synovial macrophages and fibroblasts by IFM. Synovial tissue inflammation and elevated IL-6 in synovial fluid positively correlated with PG positivity. Primary human fibroblasts stimulated with PG secreted high levels of IL-6, consistent with ex vivo findings. Interestingly, we observed a significant inverse correlation between PG and age at time of TKA, indicating younger age at time of TKA was associated with higher PG levels. CONCLUSION Peptidoglycan is commonly found in synovial tissue from patients undergoing TKA. Our data indicate that PG may play an important role in inflammatory synovitis, particularly in patients who undergo TKA at a relatively younger age.
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Affiliation(s)
- Meaghan N Holub
- Department of Orthopaedic Surgery, Medical College of Wisconsin, BSB room 2850, Milwaukee, WI, 53226, USA
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Amanda Wahhab
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Joseph R Rouse
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Rebecca Danner
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Lauren G Hackner
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Christine B Duris
- Department of Pathology, Children's Hospital of Wisconsin and the Medical College of Wisconsin, Milwaukee, WI, USA
| | - Mecaila E McClune
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA
- Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA, USA
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Tech, Blacksburg, VA, USA
| | - Jules M Dressler
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA
- Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA, USA
| | - Klemen Strle
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, USA
| | - Brandon L Jutras
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA
- Fralin Life Sciences Institute, Virginia Tech, Blacksburg, VA, USA
- Center for Emerging, Zoonotic, and Arthropod-borne Pathogens, Virginia Tech, Blacksburg, VA, USA
| | - Adam I Edelstein
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Robert B Lochhead
- Department of Orthopaedic Surgery, Medical College of Wisconsin, BSB room 2850, Milwaukee, WI, 53226, USA.
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA.
- Division of Rheumatology, Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA.
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Prinz E, Schlupp L, Dyson G, Barrett M, Szymczak A, Velasco C, Izda V, Dunn CM, Jeffries MA. OA susceptibility in mice is partially mediated by the gut microbiome, is transferrable via microbiome transplantation and is associated with immunophenotype changes. Ann Rheum Dis 2024; 83:382-393. [PMID: 37979958 PMCID: PMC10922159 DOI: 10.1136/ard-2023-224907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/03/2023] [Indexed: 11/20/2023]
Abstract
OBJECTIVES The Murphy Roths Large (MRL)/MpJ 'superhealer' mouse strain is protected from post-traumatic osteoarthritis (OA), although no studies have evaluated the microbiome in the context of this protection. This study characterised microbiome differences between MRL and wild-type mice, evaluated microbiome transplantation and OA and investigated microbiome-associated immunophenotypes. METHODS Cecal material from mixed sex C57BL6/J (B6) or female MRL/MpJ (MRL) was transplanted into B6 and MRL mice, then OA was induced by disruption of the medial meniscus surgery (DMM). In other experiments, transplantation was performed after DMM and transplantation was performed into germ-free mice. Transplanted mice were bred through F2. OARSI, synovitis and osteophyte scores were determined blindly 8 weeks after DMM. 16S microbiome sequencing was performed and metagenomic function was imputed. Immunophenotypes were determined using mass cytometry. RESULTS MRL-into-B6 transplant prior to DMM showed reduced OA histopathology (OARSI score 70% lower transplant vs B6 control), synovitis (60% reduction) and osteophyte scores (30% reduction) 8 weeks after DMM. When performed 48 hours after DMM, MRL-into-B6 transplant improved OA outcomes but not when performed 1-2 weeks after DMM. Protection was seen in F1 (60% reduction) and F2 progeny (30% reduction). Several cecal microbiome clades were correlated with either better (eg, Lactobacillus, R=-0.32, p=0.02) or worse (eg, Rikenellaceae, R=0.43, p=0.001) OA outcomes. Baseline immunophenotypes associated with MRL-into-B6 transplants and MRL included reduced double-negative T cells and increased CD25+CD4+ T cells. CONCLUSION The gut microbiome is responsible in part for OA protection in MRL mice and is transferrable by microbiome transplantation. Transplantation induces resting systemic immunophenotyping changes that correlate with OA protection.
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Affiliation(s)
- Emmaline Prinz
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
- Division of Rheumatology, Immunology, and Allergy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Leoni Schlupp
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Gabby Dyson
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Montana Barrett
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Aleksander Szymczak
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Cassandra Velasco
- Division of Rheumatology, Immunology, and Allergy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Vladislav Izda
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Christopher M Dunn
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
- Division of Rheumatology, Immunology, and Allergy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Matlock A Jeffries
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
- Division of Rheumatology, Immunology, and Allergy, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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Schlupp L, Prinz E, Dyson G, Barrett M, Izda V, Dunn CM, Jeffries MA. Sex-Linked Discrepancies in C57BL6/J Mouse Osteoarthritis are Associated With the Gut Microbiome and are Transferrable by Microbiome Transplantation. Arthritis Rheumatol 2024; 76:231-237. [PMID: 37651283 PMCID: PMC10842085 DOI: 10.1002/art.42687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/08/2023] [Accepted: 08/21/2023] [Indexed: 09/02/2023]
Abstract
OBJECTIVE Females have reduced osteoarthritis (OA) in surgical models. The objective of the current study was to evaluate a sex-linked gut microbiome in the pathogenesis of OA. METHODS We induced OA via destabilization of the medial meniscus surgery in adult male and female C57BL6/J mice with and without opposite-sex microbiome transplantation. Eight weeks later, animals were euthanized, and OA severity, synovitis, and osteophyte scores were determined. Serum lipopolysaccharide was measured chromogenically, and serum cytokines were quantified via multiplex immunoassay. Cecal microbiome profiles were generated using 16S deep sequencing. RESULTS Males had worse OA histology (3.5x, P = 6 × 10-7 ), synovitis (2.4x, P = 5 × 10-4 ), and osteophyte scores (3.7x, P = 3 × 10-4 ) than females. Male-into-female transplantation worsened all outcomes (histology 1.8x, P = 0.02; synovitis 2.0x, P = 3 × 10-5 ; osteophyte 2.1x, P = 0.01) compared to females, whereas female-into-male transplantation improved all outcomes except for synovitis (histology 0.53x, P = 2 × 10-4 ; osteophyte 0.28x, P = 5 × 10-4 ) compared to males. In the gut microbiome analysis, 44 clades were different in at least one group comparison; 5 clades were correlated with the Osteoarthritis Research Society International score (Lactobacillus R = -0.40, Aldercreutzia R = -0.40, rc4_4 R = -0.55, Sutterella R = -0.37, and Clostridiales R = 0.36). In the cytokine analysis, 10 analytes were different in at least one group comparison; 3 were different in two groups (female and female-into-male transplants vs male comparisons, all reduced in female and female-into-male transplants), including interleukin-12 (0.66x, P = 0.02; 0.66x, P = 0.02, respectively), eotaxin (0.74x, P = 5 × 10-6 ; 0.57x, P = 0.03), and tumor necrosis factor ⍺ (0.49x, P = 0.03; 0.52x, P = 0.009). CONCLUSION Sex-linked differences in the mouse gut microbiome are associated with OA outcomes, are reversible by opposite-sex microbiome transplantation, and are associated with serum cytokine changes.
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Affiliation(s)
- Leoni Schlupp
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
| | - Emmaline Prinz
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
- University of Oklahoma Health Sciences Center, Department of Internal Medicine, Division of Rheumatology, Immunology, and Allergy, Oklahoma City, OK
| | - Gabriella Dyson
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
| | - Montana Barrett
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
| | - Vladislav Izda
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
| | - Christopher M. Dunn
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
- University of Oklahoma Health Sciences Center, Department of Internal Medicine, Division of Rheumatology, Immunology, and Allergy, Oklahoma City, OK
| | - Matlock A. Jeffries
- Oklahoma Medical Research Foundation, Arthritis & Clinical Immunology Program, Oklahoma City, OK
- University of Oklahoma Health Sciences Center, Department of Internal Medicine, Division of Rheumatology, Immunology, and Allergy, Oklahoma City, OK
- Oklahoma City VA Medical Center, Oklahoma City, OK
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Marchese L, Contartese D, Giavaresi G, Di Sarno L, Salamanna F. The Complex Interplay between the Gut Microbiome and Osteoarthritis: A Systematic Review on Potential Correlations and Therapeutic Approaches. Int J Mol Sci 2023; 25:143. [PMID: 38203314 PMCID: PMC10778637 DOI: 10.3390/ijms25010143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
The objective of this review is to systematically analyze the potential correlation between gut microbiota and osteoarthritis (OA) as well as to evaluate the feasibility of microbiota-targeted therapies for treating OA. Studies conducted from October 2013 to October 2023 were identified via a search on electronic databases such as PubMed, Web of Science, and Scopus, following established PRISMA statement standards. Two reviewers independently screened, assessed, and extracted relevant data, and then they graded the studies using the ROBINS I tool for non-randomized interventions studies and SYRCLE's risk-of-bias tool for animal studies. A search through 370 studies yielded 38 studies (24 preclinical and 14 clinical) that were included. In vivo research has predominantly concentrated on modifying the gut microbiota microenvironment, using dietary supplements, probiotics, and prebiotics to modify the OA status. Lactobacilli are the most thoroughly examined with Lactobacillus acidophilus found to effectively reduce cartilage damage, inflammatory factors, and pain. Additionally, Lactobacillus M5 inhibits the development of OA by preventing high-fat diet (HFD)-induced obesity and protecting cartilage from damage. Although there are limited clinical studies, certain compositions of intestinal microbiota may be associated with onset and progression of OA, while others are linked to pain reduction in OA patients. Based on preclinical studies, there is evidence to suggest that the gut microbiota could play a significant role in the development and progression of OA. However, due to the scarcity of clinical studies, the exact mechanism linking the gut microbiota and OA remains unclear. Further research is necessary to evaluate specific gut microbiota compositions, potential pathogens, and their corresponding signaling pathways that contribute to the onset and progression of OA. This will help to validate the potential of targeting gut microbiota for treating OA patients.
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Affiliation(s)
| | | | - Gianluca Giavaresi
- Surgical Sciences and Technologies, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy; (L.M.); (D.C.); (L.D.S.); (F.S.)
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Fu Y, Batushansky A, Kinter M, Huebner JL, Kraus VB, Griffin TM. Effects of Leptin and Body Weight on Inflammation and Knee Osteoarthritis Phenotypes in Female Rats. JBMR Plus 2023; 7:e10754. [PMID: 37457883 PMCID: PMC10339097 DOI: 10.1002/jbm4.10754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/22/2023] [Accepted: 04/13/2023] [Indexed: 07/18/2023] Open
Abstract
Leptin is a proinflammatory adipokine that contributes to obesity-associated osteoarthritis (OA), especially in women. However, the extent to which leptin causes knee OA separate from the effect of increased body weight is not clear. We hypothesized that leptin is necessary to induce knee OA in obese female rats but not sufficient to induce knee OA in lean rats lacking systemic metabolic inflammation. The effect of obesity without leptin signaling was modeled by comparing female lean Zucker rats to pair fed obese Zucker rats, which possess mutant fa alleles of the leptin receptor gene. The effect of leptin without obesity was modeled in female F344BN F1 hybrid rats by systemically administering recombinant rat leptin versus saline for 23 weeks via osmotic pumps. Primary OA outcomes included cartilage histopathology and subchondral bone micro-computed tomography. Secondary outcomes included targeted cartilage proteomics, serum inflammation, and synovial fluid inflammation following an acute intra-articular challenge with interleukin-1β (IL-1β). Compared to lean Zucker rats, obese Zucker rats developed more severe tibial osteophytes and focal cartilage lesions in the medial tibial plateau, with modest changes in proximal tibial epiphysis trabecular bone structure. In contrast, exogenous leptin treatment, which increased plasma leptin sixfold without altering body weight, caused mild generalized cartilage fibrillation and reduced Safranin O staining compared to vehicle-treated animals. Leptin also significantly increased subchondral and trabecular bone volume and bone mineral density in the proximal tibia. Cartilage metabolic and antioxidant enzyme protein levels were substantially elevated with leptin deficiency and minimally suppressed with leptin treatment. In contrast, leptin treatment induced greater changes in systemic and local inflammatory mediators compared to leptin receptor deficiency, including reduced serum IL-6 and increased synovial fluid IL-1β. In conclusion, rat models that separately elevate leptin or body weight develop distinct OA-associated phenotypes, revealing how obesity increases OA pathology through both leptin-dependent and independent pathways. © 2023 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Yao Fu
- Aging and Metabolism Research ProgramOklahoma Medical Research FoundationOklahoma CityOklahomaUSA
| | - Albert Batushansky
- Aging and Metabolism Research ProgramOklahoma Medical Research FoundationOklahoma CityOklahomaUSA
| | - Michael Kinter
- Aging and Metabolism Research ProgramOklahoma Medical Research FoundationOklahoma CityOklahomaUSA
- Oklahoma Center for GeroscienceUniversity of Oklahoma Health Sciences CenterOklahoma CityOklahomaUSA
| | - Janet L. Huebner
- Duke Molecular Physiology InstituteDuke University, School of Medicine, Duke UniversityDurhamNorth CarolinaUSA
| | - Virginia B. Kraus
- Duke Molecular Physiology InstituteDuke University, School of Medicine, Duke UniversityDurhamNorth CarolinaUSA
- Division of Rheumatology, Department of MedicineDuke University, School of Medicine, Duke UniversityDurhamNorth CarolinaUSA
| | - Timothy M. Griffin
- Aging and Metabolism Research ProgramOklahoma Medical Research FoundationOklahoma CityOklahomaUSA
- Oklahoma Center for GeroscienceUniversity of Oklahoma Health Sciences CenterOklahoma CityOklahomaUSA
- Department of Biochemistry and Molecular BiologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOklahomaUSA
- Veterans Affairs Medical CenterOklahoma CityOklahomaUSA
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Holub MN, Wahhab A, Rouse JR, Danner R, McClune MM, Dressler JM, Strle K, Jutras BL, Edelstein AI, Lochhead RB. Peptidoglycan in osteoarthritis synovial tissue is associated with joint inflammation. Res Sq 2023:rs.3.rs-2842385. [PMID: 37162851 PMCID: PMC10168439 DOI: 10.21203/rs.3.rs-2842385/v1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Objectives Peptidoglycan (PG) is an arthritogenic bacterial cell wall component whose role in human osteoarthritis is poorly understood. The purpose of this study was to determine if PG is present in synovial tissue of osteoarthritis patients at the time of primary total knee arthroplasty (TKA), and if its presence is associated with inflammation and patient reported outcomes. Methods Intraoperative synovial tissue and synovial fluid samples were obtained from 56 patients undergoing primary TKA, none of whom had history of infection. PG in synovial tissue was detected by immunohistochemistry (IHC). Synovial tissue inflammation and fibrosis were assessed by histopathology and synovial fluid cytokine quantification. Primary human fibroblasts isolated from arthritis synovial tissue were stimulated with PG to determine inflammatory cytokine response. Results A total of 33/56 (59%) of primary TKA synovial tissue samples were positive for PG by IHC, with mean 8 PG occurrences per 10 mm2 of tissue in PG-positive samples. Synovial tissue inflammation and elevated IL-6 in synovial fluid positively correlated with PG positivity. Primary human fibroblasts stimulated with PG secreted high levels of IL-6, consistent with ex vivo findings. Interestingly, we observed a significant inverse correlation between PG and age at time of TKA, indicating younger age at time of TKA was associated with higher PG levels. Conclusion Peptidoglycan is commonly found in synovial tissue from patients undergoing TKA. Our data indicate that PG may play an important role in inflammatory synovitis, particularly in patients who undergo TKA at a relatively younger age.
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Binvignat M, Emond P, Mifsud F, Miao B, Courties A, Lefèvre A, Maheu E, Crema MD, Klatzmann D, Kloppenburg M, Richette P, Butte AJ, Mariotti-Ferrandiz E, Berenbaum F, Sokol H, Sellam J. Serum Tryptophan Metabolites are Associated with Erosive Hand Osteoarthritis and Pain: Results from the DIGICOD Cohort. Osteoarthritis Cartilage 2023:S1063-4584(23)00761-6. [PMID: 37105396 DOI: 10.1016/j.joca.2023.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 11/18/2022] [Revised: 04/09/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023]
Abstract
OBJECTIVE To investigate host and gut-microbiota related Tryptophan metabolism in hand osteoarthritis (HOA). METHODS The baseline serum concentration of 20 Tryptophan metabolites was measured in 416 HOA patients in a cross-sectional analysis of the DIGICOD cohort. Tryptophan metabolites levels, metabolite-ratios and metabolism pathway activation were compared between erosive (N=141) and non-erosive HOA (N=275) by multiple logistic regressions adjusted on age, BMI and sex. The association between Tryptophan metabolite levels and HOA symptoms was investigated by a Spearman's rank correlation analysis. RESULTS Four serum Tryptophan metabolites, eight metabolite ratios and one metabolism pathway were associated with erosive HOA. Erosive HOA was negatively associated with Tryptophan (odds ratio (OR)=0.41, 95% confidence interval [0.24-0.70]), indole-3-aldehyde (OR=0.67 [0.51-0.90]) and 3-OH-anthranilic acid (OR=1.32 [1.13-1.54]) and positively with 5-OH-Tryptophan levels (OR=1.41 [1.13-1.77]). The pro-inflammatory kynurenine-indoleamine 2,3-dioxygenase pathway was upregulated in erosive HOA (OR=1.60 [1.11-2.29]). Eleven metabolites were correlated with HOA symptoms and were mostly pain-related. Serotonin and N-acetyl serotonin levels were negatively correlated with number of tender joints. Indole-3-aldehyde level was negatively correlated and 3-OH-anthranilic acid, 3-OH-kynurenine and 5-OH-Tryptophan levels were positively correlated with number of patients-reported painful joints. Quinolinic acid and 3-OH-kynurenine levels correlated positively with AUSCAN pain. CONCLUSIONS Tryptophan metabolites disturbance is associated with erosive HOA and pain and emphasize the role of low-grade inflammation and gut dysbiosis in HOA.
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Affiliation(s)
- Marie Binvignat
- Department of Rheumatology, Sorbonne Université, Saint-Antoine Hospital, INSERM UMRS-938, Centre de Recherche Saint-Antoine (CRSA), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France; Immunology, Immunopathology, Immunotherapy I3 Lab, Inserm URMS 959, Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Bakar Computational Health Science Institute, University of California, San Francisco, San Francisco,CA, USA; Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - Patrick Emond
- IBrain Lab, Inserm UMR 1253 Université de Tours, Tours France; Department of Nuclear Medicine, Centre Hospitalo-Universitaire de Tours, Tours France
| | - Francois Mifsud
- Université de Paris, BFA, CNRS UMR 8251, 75013 Paris, France; Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Brenda Miao
- Bakar Computational Health Science Institute, University of California, San Francisco, San Francisco,CA, USA
| | - Alice Courties
- Department of Rheumatology, Sorbonne Université, Saint-Antoine Hospital, INSERM UMRS-938, Centre de Recherche Saint-Antoine (CRSA), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France; Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - Antoine Lefèvre
- IBrain Lab, Inserm UMR 1253 Université de Tours, Tours France
| | - Emmanuel Maheu
- Department of Rheumatology, Sorbonne Université, Saint-Antoine Hospital, INSERM UMRS-938, Centre de Recherche Saint-Antoine (CRSA), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Michel D Crema
- Institute of Sports Imaging, French National Institute of Sports (INSEP), Paris, France
| | - David Klatzmann
- Immunology, Immunopathology, Immunotherapy I3 Lab, Inserm URMS 959, Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France; Biotherapy (CIC-BTi) and Inflammation-Immunopathology-Biotherapy Department (i2B), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Margreet Kloppenburg
- Departments of Rheumatology and Clinical Epidemiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Pascal Richette
- Department of Rheumatology, Lariboisière Hospital, INSERM U1132, Université de Paris, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Atul J Butte
- Bakar Computational Health Science Institute, University of California, San Francisco, San Francisco,CA, USA
| | - Encarnita Mariotti-Ferrandiz
- Immunology, Immunopathology, Immunotherapy I3 Lab, Inserm URMS 959, Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France
| | - Francis Berenbaum
- Department of Rheumatology, Sorbonne Université, Saint-Antoine Hospital, INSERM UMRS-938, Centre de Recherche Saint-Antoine (CRSA), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France; Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - Harry Sokol
- Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris, France; Department of Gastroenterology Sorbonne Université, Saint Antoine Hospital, Centre de Recherche Saint-Antoine (CRSA) INSERM UMRS-938, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France; Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Jérémie Sellam
- Department of Rheumatology, Sorbonne Université, Saint-Antoine Hospital, INSERM UMRS-938, Centre de Recherche Saint-Antoine (CRSA), Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France; Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris, France.
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Liu M, Matuszek G, Azcarate-Peril MA, Loeser RF, Shea MK. An Exploratory Case-Control Study on the Associations of Bacterially-Derived Vitamin K Forms with the Intestinal Microbiome and Obesity-Related Osteoarthritis. Curr Dev Nutr 2023; 7:100049. [PMID: 37181928 PMCID: PMC10111584 DOI: 10.1016/j.cdnut.2023.100049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 02/01/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023] Open
Abstract
Background Evidence suggests that natural metabolites produced by intestinal microorganisms may have beneficial or harmful effects on osteoarthritis (OA). This could include menaquinones, which are bacterially-synthesized, biologically-active vitamin K forms abundant in the intestinal microbiome. Objectives The overall goal of this study was to evaluate the association of intestinally-derived menaquinones with obesity-related OA. Methods This case-control study used data and biospecimens derived from a subgroup of Johnston County Osteoarthritis Study participants. Fecal menaquinone concentrations and microbial composition were determined in 52 obese participants with hand and knee OA and 42 age- and sex-matched obese participants without OA. The inter-relationships among fecal menaquinones were evaluated using principal component analysis. The differences in alpha and beta diversities and microbial composition across menaquinone clusters were evaluated using ANOVA. Results The samples were clustered into the following 3 groups: cluster 1 characterized by higher fecal menaquinone-9 and -10 concentrations, cluster 2 characterized by lower overall menaquinone concentrations, and cluster 3 characterized by higher menaquinone-12 and -13 concentrations. Overall, fecal menaquinone clusters did not differ between participants with or without OA (P = 0.707). Microbial diversity did not differ across the fecal menaquinone clusters (all F-test P > 0.12). However, the relative abundance of bacterial taxa differed among clusters, with higher abundance of Coprococcus, Prevotella, and Eggerthella in cluster 2 than in cluster 1; higher abundance of Oscillospira, Dorea, Eubacterium, and Bacteroides in cluster 3 than in cluster 1; and higher abundance of Prevotella, Sutterella, and Dorea in cluster 3 than in cluster 2 (all P < 0.001). Conclusion Menaquinones were variable and abundant in the human gut, but the fecal menaquinone clusters did not differ with OA status. Although the relative abundance of specific bacterial taxa differed among fecal menaquinone clusters, the relevance of these differences with respect to vitamin K status and human health is uncertain.
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Affiliation(s)
- Minying Liu
- USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
| | - Gregory Matuszek
- USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
| | - M Andrea Azcarate-Peril
- Division of Gastroenterology and Hepatology and UNC Microbiome Core, Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Richard F. Loeser
- Division of Rheumatology, Allergy, and Immunology and the Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - M Kyla Shea
- USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
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Kraus VB, Nelson AE, Huang Z. Chondroprotection of leptin deficiency demystified? Osteoarthritis Cartilage 2023; 31:18-20. [PMID: 36244625 PMCID: PMC9772286 DOI: 10.1016/j.joca.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022]
Affiliation(s)
- V B Kraus
- Duke Molecular Physiology Institute and Department of Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - A E Nelson
- Thurston Arthritis Research Center and Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Z Huang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
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Song B, Zhao K, Zhou S, Xue Y, Lu H, Jia X, Wang S. Association of the gut microbiome with fecal short-chain fatty acids, lipopolysaccharides, and obesity in young Chinese college students. Front Nutr 2023; 10:1057759. [PMID: 37139436 PMCID: PMC10150786 DOI: 10.3389/fnut.2023.1057759] [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: 09/30/2022] [Accepted: 03/24/2023] [Indexed: 05/05/2023] Open
Abstract
Introduction Obesity is a growing health problem among young people worldwide and is associated with gut conditions. This study aimed to explore the relationship between obesity, intestinal microbiota, fecal short-chain fatty acids (SCFAs), and lipopolysaccharide (LPS) in young college students. Methods 16S rRNA gene sequences, SCFA and LPS contents, and obesity status were analyzed in 68 young college students (20-25 years old). Results There were significant differences in intestinal microbial beta diversity among students with different body mass index (BMI). The abundance and proportion of Firmicutes and Bacteroides had no significant correlation with BMI. The contents of butyric acid and valeric acid in the feces of obese students were low, and the content of SCFAs had no significant correlation with BMI and LPS. The content of LPS in the feces of obese people was significantly higher than that in healthy people, and there was a significant positive correlation between LPS content and BMI. Conclusion In general, there was a correlation between intestinal microbiota, SCFA, LPS, and BMI in young college students. Our results may enrich the understanding of the relationship between intestinal conditions and obesity and contribute to the study of obesity in young college students.
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Affiliation(s)
- Baokuo Song
- College of Foods Science and Biology, Hebei University of Science and Technology, Shijiazhuang, China
| | - Kexin Zhao
- Shijiazhuang People’s Hospital, Shijiazhuang, China
| | - Shuaikang Zhou
- College of Foods Science and Biology, Hebei University of Science and Technology, Shijiazhuang, China
| | - Yuling Xue
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
| | - Han Lu
- College of Foods Science and Biology, Hebei University of Science and Technology, Shijiazhuang, China
| | - Xianxian Jia
- Basic Medical College, Hebei Medical University, Shijiazhuang, China
| | - Shijie Wang
- College of Foods Science and Biology, Hebei University of Science and Technology, Shijiazhuang, China
- Junlebao Dairy Group Co., Ltd., Shijiazhuang, Hebei, China
- *Correspondence: Shijie Wang,
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Arbeeva L, Azcarate-Peril MA, Cui Y, Nelson AE, Loeser RF. Association of plasma microbial composition with a leaky gut in obesity-related osteoarthritis: An exploratory study. Osteoarthr Cartil Open 2022; 4:100317. [PMID: 36474790 PMCID: PMC9718202 DOI: 10.1016/j.ocarto.2022.100317] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 10/18/2022] [Revised: 10/19/2022] [Accepted: 10/21/2022] [Indexed: 12/24/2022] Open
Abstract
Objective To examine the plasma microbiome for differences between obese individuals with and without osteoarthritis (OA) and its association with serum lipopolysaccharide (LPS). Design Blood samples from 70 participants with body mass index (BMI) ≥ 30kg/m2 and age ≥55 years, with (cases) or without (controls) hand plus knee OA, were analyzed for serum LPS and composition of the plasma microbiome. The Dirichlet-multinominal recursive partitioning model (DM-RPart) was applied to microbiome compositional data to test the hypothesis that LPS levels distinguish plasma microbiome, accounting for BMI and age. Results No significant differences in alpha diversity, or compositional differences between groups at the genus level, were seen between cases and controls (p = 0.11). β-Diversity was significantly associated with serum LPS levels (p = 0.01). DM-RPart resulted in an optimal tree with 3 divisions: 1) based on age (split at 69 years); 2) those older than 69 were split based on BMI; 3) those with BMI <39 kg/m2 were split based on LPS level (at 65 EU/ml). This resulted in 4 groups (nodes 2, and 5-7). Participants in node 2 were younger and the majority had no or mild OA. Those in nodes 5 and 6 were comparable in age and BMI but node 6 had higher LPS and more severe OA. Individuals in node 7 were older, had higher BMI, and the most severe OA. Conclusions Our results suggest a relationship between serum LPS and the plasma microbiome in a subgroup of obese individuals with hand plus knee OA that could reflect differences in intestinal permeability.
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Affiliation(s)
- Liubov Arbeeva
- Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - M. Andrea Azcarate-Peril
- Division of Gastroenterology and Hepatology and UNC Microbiome Core, Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Yang Cui
- Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Amanda E. Nelson
- Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Richard F. Loeser
- Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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Yang J, Liu W. The Role of AIM2 Inflammasome in Knee Osteoarthritis. J Inflamm Res 2022; 15:6453-6461. [PMID: 36467990 PMCID: PMC9717587 DOI: 10.2147/jir.s392652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Knee osteoarthritis (KOA), whose prevalence keeps rising, is still unsolved pathobiological/therapeutical problem. Historically, knee osteoarthritis was thought to be a "wear and tear" disease, while recent etiology hypotheses stressed it as a chronic, low-grade inflammatory disease. Inflammasomes mediated by the innate immunity systems have an important role in inflammatory diseases including KOA. A deluge of recent studies focused on the NLRP3 inflammasome with suggestions that its pharmacologic block would hinder degeneration. However, known inflammasomes are numerous and can also trigger IL-1β/IL-18 production and cells' pyroptotic death. Among them, AIM2 inflammasome is involved in key aspects of various acute and chronic inflammatory diseases. Therefore, while presently leaving out little-studied inflammasomes in KOA, this review focuses on the AIM2 inflammasomes that participate in KOA's complex mechanisms in conjunction with the activation of AIM2 inflammasomes in other diseases combined with the current studies on KOA mechanisms. Although human-specific data about it are relatively scant, we stress that only a holistic view including several inflammasomes including AIM2 inflammasome and other potential pathogenetic drivers will lead to successful therapy for knee osteoarthritis.
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Affiliation(s)
- Jiyong Yang
- The Fifth Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, 510095, People’s Republic of China
| | - Wengang Liu
- Guangdong Second Traditional Chinese Medicine Hospital, Guangzhou, 510095, People’s Republic of China
- Correspondence: Wengang Liu, Orthopedics Department, Guangdong Second Traditional Chinese Medicine Hospital, Guangzhou, 510095, People’s Republic of China, Email
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Dong Y, Wang P, Yang X, Chen M, Li J. Potential of gut microbiota for lipopolysaccharide biosynthesis in European women with type 2 diabetes based on metagenome. Front Cell Dev Biol 2022; 10:1027413. [PMID: 36303603 PMCID: PMC9592851 DOI: 10.3389/fcell.2022.1027413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 09/27/2022] [Indexed: 11/16/2022] Open
Abstract
The abnormal accumulation of lipopolysaccharide (LPS) plays a crucial role in promoting type 2 diabetes (T2D). However, the capability of the gut microbiota to produce LPS in patients with T2D is still unclear, and evidence characterizing the patterns of gut microbiota with LPS productivity remains rare. This study aimed to uncover the profiles of LPS-biosynthesis-related enzymes and pathways, and explore the potential of LPS-producing gut microbiota in T2D. The gut metagenomic sequencing data from a European female cohort with normal glucose tolerance or untreated T2D were analyzed in this study. The sequence search revealed that the relative abundance of the critical enzymes responsible for LPS biosynthesis was significantly high in patients with T2D, especially for N-acetylglucosamine deacetylase, 3-deoxy-D-manno-octulosonic-acid transferase, and lauroyl-Kdo2-lipid IVA myristoyltransferase. The functional analysis indicated that a majority of pathways involved in LPS biosynthesis were augmented in patients with T2D. A total of 1,173 species from 335 genera containing the gene sequences of LPS enzymes, including LpxA/B/C/D/H/K/L/M and/or WaaA, coexisted in controls and patients with T2D. Critical taxonomies with discriminative fecal abundance between groups were revealed, which exhibited different associations with enzymes. Moreover, the identified gut microbial markers had correlations with LPS enzymes and were subsequently associated with microbial pathways. The present findings delineated the potential capability of gut microbiota toward LPS biosynthesis in European women and highlighted a gut microbiota−based mechanistic link between the disturbance in LPS biosynthesis and T2D. The restoration of LPS levels through gut microbiota manipulation might offer potential approaches for preventing and treating T2D.
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Liu L, Tian F, Li GY, Xu W, Xia R. The effects and significance of gut microbiota and its metabolites on the regulation of osteoarthritis: Close coordination of gut-bone axis. Front Nutr 2022; 9:1012087. [PMID: 36204373 PMCID: PMC9530816 DOI: 10.3389/fnut.2022.1012087] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
Osteoarthritis (OA) is a common chronic degenerative disease of articular cartilage in middle-aged and older individuals, which can result in the joint pain and dysfunction, and even cause the joint deformity or disability. With the enhancing process of global aging, OA has gradually become a major public health problem worldwide. Explaining pathogenesis of OA is critical for the development of new preventive and therapeutic interventions. In recent years, gut microbiota (GM) has been generally regarded as a “multifunctional organ,” which is closely relevant with a variety of immune, metabolic and inflammatory functions. Meanwhile, more and more human and animal researches have indicated the existence of gut-bone axis and suggested that GM and its metabolites are closely involved in the pathogenic process of OA, which might become a potential and promising intervention target. Based on the close coordination of gut-bone axis, this review aims to summarize and discuss the mechanisms of GM and its metabolites influencing OA from the aspects of the intestinal mucosal barrier modulation, intestinal metabolites modulation, immune modulation and strategies for the prevention or treatment of OA based on perspectives of GM and its metabolites, thus providing a profound knowledge and recognition of it.
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Xiang W, Ji B, Jiang Y, Xiang H. Association of low-grade inflammation caused by gut microbiota disturbances with osteoarthritis: A systematic review. Front Vet Sci 2022; 9:938629. [PMID: 36172610 PMCID: PMC9510893 DOI: 10.3389/fvets.2022.938629] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/24/2022] [Indexed: 12/09/2022] Open
Abstract
Background Currently, many studies have been published on the relationship between the gut microbiome and knee osteoarthritis. However, the evidence for the association of gut microbiota with knee osteoarthritis has not been comprehensively evaluated. Objective This review aimed to assess existing results and provide scientific evidence for the association of low-grade inflammation caused by gut microbiota disturbances with knee osteoarthritis. Methods This study conducted an extensive review of the current literature using four databases, PubMed, EMBASE, Cochrane Library and Web of Science before 31 December 2021. Risk of bias was determined using ROBINS and SYRCLE, and quality of evidence was assessed using GRADE and CAMADARES criteria. Twelve articles were included. Results Studies have shown that a high-fat diet leads to a disturbance of the gut microbiota, mainly manifested by an increase in the abundance of Firmicutes and Proteobacteria, a decrease in Bacteroidetes, and an increase in the Firmicutes/ Bacteroidetes ratio. Exercise can reverse the pattern of gain or loss caused by high fat. These changes are associated with elevated levels of serum lipopolysaccharide (LPS) and its binding proteins, as well as various inflammatory factors, leading to osteoarthritis (OA). Conclusion This systematic review shows that a correlation between low-grade inflammation caused by gut microbiota disturbances and severity of knee osteoarthritis radiology and dysfunction. However, there was a very small number of studies that could be included in the review. Thus, further studies with large sample sizes are warranted to elucidate the association of low-grade inflammation caused by gut microbiota disturbances with osteoarthritis, and to explore the possible mechanisms for ameliorating osteoarthritis by modulating gut microbiota.
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Affiliation(s)
- Wu Xiang
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Bingjin Ji
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Yiqin Jiang
- Department of Rehabilitation, Beibei Traditional Chinese Medical Hospital, Chongqing, China
| | - Han Xiang
- Department of Radiology, Daping Hospital, Army Medical University, Chongqing, China
- *Correspondence: Han Xiang
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Abstract
PURPOSE OF THE REVIEW The microbiome has recently emerged as a powerful contributor to health and illness in chronic, systemic disorders. Furthermore, new microbiome niches beyond traditional gut locations are frequently being described. Over the past 5 years, numerous pivotal studies have demonstrated associations between changes in various microbiome niches and the development of osteoarthritis (OA). Herein, we review the most impactful recent literature, including microbiome associations with disease and the potential therapeutic value of microbiome manipulation. RECENT FINDINGS The gut microbiome of human OA patients is enriched in specific bacterial clades, most notably Streptococcus, which correlates with OA pain, Firmicutes, and others. Most studies have focused on knee OA, although one publication demonstrated positive associations with 3 gut microbiome clades in hand OA. OA can be easily distinguished from RA by evaluating differences in oral microbiome composition. Most studies have also demonstrated a reduction in richness of the gut microbiome (alpha diversity) associated with OA. Several studies have identified bacterial signatures within human knee and hip cartilage, synovial fluid, and synovial tissue and have described changes in these patterns occurring with the development of OA. In animal models of OA, high-fat diet-induced obesity has been the most well-studied OA risk factor associated with changes in the microbiome, with numerous bacterial clades changed within the gut microbiome and associated with OA. Also in animal models, various oral supplementations, including dietary fiber, probiotics including Lactobacillus species, and cecal microbiome transplantation have all shown improvements in OA histopathology or cartilage healing. Microbiome changes are strongly associated with the OA disease process and with individual OA risk factors related to both the gut microbiome and the microbial DNA patterns in the joint. Microbiome-directed interventions have the potential to prevent or reduce the progression of OA. Future studies should investigate the mechanistic underpinnings of these microbiome associations and further define the therapeutic potential of microbiome augmentation.
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Affiliation(s)
- Christopher M Dunn
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA
- Department of Internal Medicine, Division of Rheumatology, Immunology and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Matlock A Jeffries
- Arthritis & Clinical Immunology Program, Oklahoma Medical Research Foundation, 825 NE 13th Street, Laboratory MC400, Oklahoma City, OK, 73104, USA.
- Department of Internal Medicine, Division of Rheumatology, Immunology and Allergy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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Rushing BR, McRitchie S, Arbeeva L, Nelson AE, Azcarate-Peril MA, Li YY, Qian Y, Pathmasiri W, Sumner SC, Loeser RF. Fecal metabolomics reveals products of dysregulated proteolysis and altered microbial metabolism in obesity-related osteoarthritis. Osteoarthritis Cartilage 2022; 30:81-91. [PMID: 34718137 PMCID: PMC8712415 DOI: 10.1016/j.joca.2021.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 09/16/2021] [Accepted: 10/13/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The objective of this exploratory study was to determine if perturbations in gut microbial composition and the gut metabolome could be linked to individuals with obesity and osteoarthritis (OA). METHODS Fecal samples were collected from obese individuals diagnosed with radiographic hand plus knee OA (n = 59), defined as involvement of at least 3 joints across both hands, and a Kellgren-Lawrence (KL) grade 2-4 (or total knee replacement) in at least one knee. Controls (n = 33) were without hand OA and with KL grade 0-1 knees. Fecal metabolomes were analyzed by a UHPLC/Q Exactive HFx mass spectrometer. Microbiome composition was determined in fecal samples by 16 S ribosomal RNA amplicon sequencing (rRNA-seq). Stepwise logistic regression models were built to determine microbiome and/or metabolic characteristics of OA. RESULTS Untargeted metabolomics analysis indicated that OA cases had significantly higher levels of di- and tripeptides and significant perturbations in microbial metabolites including propionic acid, indoles, and other tryptophan metabolites. Pathway analysis revealed several significantly perturbed pathways associated with OA including leukotriene metabolism, amino acid metabolism and fatty acid utilization. Logistic regression models selected metabolites associated with the gut microbiota and leaky gut syndrome as significant predictors of OA status, particularly when combined with the rRNA-seq data. CONCLUSIONS Adults with obesity and knee plus hand OA have distinct fecal metabolomes characterized by increased products of proteolysis, perturbations in leukotriene metabolism, and changes in microbial metabolites compared with controls. These metabolic perturbations indicate a possible role of dysregulated proteolysis in OA.
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Affiliation(s)
- Blake R. Rushing
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA
| | - Susan McRitchie
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA
| | - Liubov Arbeeva
- Department of Medicine, Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, NC, USA
| | - Amanda E. Nelson
- Department of Medicine, Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, NC, USA
| | - M. Andrea Azcarate-Peril
- Department of Medicine, Division of Gastroenterology and Hepatology and UNC Microbiome Core, Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, NC, USA
| | - Yuan-Yuan Li
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA
| | - Yunzhi Qian
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA
| | - Wimal Pathmasiri
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA
| | - Susan C.J. Sumner
- Department of Nutrition, University of North Carolina at Chapel Hill, Nutrition Research Institute, Kannapolis, NC, USA,Corresponding authors: Richard F. Loeser, Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, 3300 Thurston Building, Campus Box 7280, University of North Carolina School of Medicine, Chapel Hill, North Carolina, 27599, USA, Phone: 919-966-7042; , Susan C.J. Sumner, Nutrition Research Institute, Department of Nutrition, UNC Chapel Hill, North Carolina, USA,
| | - Richard F. Loeser
- Department of Medicine, Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, NC, USA,Corresponding authors: Richard F. Loeser, Division of Rheumatology, Allergy and Immunology and the Thurston Arthritis Research Center, 3300 Thurston Building, Campus Box 7280, University of North Carolina School of Medicine, Chapel Hill, North Carolina, 27599, USA, Phone: 919-966-7042; , Susan C.J. Sumner, Nutrition Research Institute, Department of Nutrition, UNC Chapel Hill, North Carolina, USA,
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Chisari E, Wouthuyzen-Bakker M, Friedrich AW, Parvizi J. The relation between the gut microbiome and osteoarthritis: A systematic review of literature. PLoS One 2021; 16:e0261353. [PMID: 34914764 PMCID: PMC8675674 DOI: 10.1371/journal.pone.0261353] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 11/30/2021] [Indexed: 02/07/2023] Open
Abstract
Background Along with mechanical and genetic factors, emerging evidence suggests that the presence of low-grade inflammation has a role in the pathogenesis of osteoarthritis (OA) and seems to be related to the microbiome composition of the gut. Purpose To provide evidence whether there is clinical or preclinical evidence of gut-joint axis in the pathogenesis and symptoms of OA. Methods An extensive review of the current literature was performed using three different databases. Human, as well as animal studies, were included. The risk of bias was identified using ROBINS and SYRCLE tools, while the quality of evidence was assessed using GRADE and CAMADARES criteria. Results A total of nineteen articles were included. Multiple animal studies demonstrated that both obesity, and high-fat and high-sugar diets resulted in a gut dysbiosis status characterized by increased Firmicutes/Bacteroidetes (F/B) phyla ratio and increased permeability. These changes were associated with increased lipopolysaccharide serum levels, which consequently resulted in synovitis and OA severity. The administration of pre-and probiotics partially reversed this bacterial composition. In addition, in human studies, a decreased amount of gut Bacteroidetes, subsequent increased F/B ratio, have also been observed in OA patients. Conclusions Our review confirms preliminary yet sound evidence supporting a gut-joint axis in OA in primarily preclinical models, by showing an association between diet, gut dysbiosis and OA radiological severity and self-reported symptoms. Clinical studies are needed to confirm these findings, and to investigate whether interventions targeting the composition of the microbiome will have a beneficial clinical effect.
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Affiliation(s)
- Emanuele Chisari
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America.,Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, RB, Groningen, Netherlands
| | - Marjan Wouthuyzen-Bakker
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, RB, Groningen, Netherlands
| | - Alex W Friedrich
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, RB, Groningen, Netherlands
| | - Javad Parvizi
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
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