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Sasikumar J, Laha S, Naik B, Das SP. Enhanced visualization of nuclear staining and cell cycle analysis for the human commensal Malassezia. Sci Rep 2024; 14:20936. [PMID: 39251619 PMCID: PMC11385215 DOI: 10.1038/s41598-024-69024-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 07/30/2024] [Indexed: 09/11/2024] Open
Abstract
Malassezia is a lipophilic commensal yeast that resides mainly on the mammalian skin and is also found to associate with the internal organs. Dysbiosis of Malassezia is related to several diseases and often escapes detection as it is difficult to culture and maintain. Malassezia cell wall differs from other budding yeasts like S. cerevisiae due to the difference in the lipid content and is difficult to transform. In this study, we present a methodology to stain Malassezia's nucleus and perform cell cycle studies. However, staining presents a challenge due to its exceptionally thick cell wall with high lipid content, hindering conventional methods. Our novel methodology addresses this challenge and enables the staining of the Malassezia nucleus with a low background. This would allow researchers to visualize the overall nuclear health specifically nuclear morphology and analyze DNA content, crucial for cell cycle progression. By employing DNA-specific dyes like DAPI or Hoechst, we can observe the nuclear structure, and using PI we can differentiate cells in distinct cell cycle phases using techniques like flow cytometry. This novel staining methodology unlocks the door for in-depth cell cycle analysis in Malassezia which has challenged us through ages being refractory to genetic manipulations, paving the way for a deeper understanding of this commensal fungus and its potential role in human health.
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Affiliation(s)
- Jayaprakash Sasikumar
- Cell Biology and Molecular Genetics, Yenepoya Research Centre, Yenepoya (Deemed to Be University), Mangalore, 575018, India
| | - Suparna Laha
- Cell Biology and Molecular Genetics, Yenepoya Research Centre, Yenepoya (Deemed to Be University), Mangalore, 575018, India
| | - Bharati Naik
- Cell Biology and Molecular Genetics, Yenepoya Research Centre, Yenepoya (Deemed to Be University), Mangalore, 575018, India
| | - Shankar Prasad Das
- Cell Biology and Molecular Genetics, Yenepoya Research Centre, Yenepoya (Deemed to Be University), Mangalore, 575018, India.
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2
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Naik B, Sasikumar J, Das SP. From Skin and Gut to the Brain: The Infectious Journey of the Human Commensal Fungus Malassezia and Its Neurological Consequences. Mol Neurobiol 2024:10.1007/s12035-024-04270-w. [PMID: 38871941 DOI: 10.1007/s12035-024-04270-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 05/27/2024] [Indexed: 06/15/2024]
Abstract
The human mycobiome encompasses diverse communities of fungal organisms residing within the body and has emerged as a critical player in shaping health and disease. While extensive research has focused on the skin and gut mycobiome, recent investigations have pointed toward the potential role of fungal organisms in neurological disorders. Among those fungal organisms, the presence of the commensal fungus Malassezia in the brain has created curiosity because of its commensal nature and primary association with the human skin and gut. This budding yeast is responsible for several diseases, such as Seborrheic dermatitis, Atopic dermatitis, Pityriasis versicolor, Malassezia folliculitis, dandruff, and others. However recent findings surprisingly show the presence of Malassezia DNA in the brain and have been linked to diseases like Alzheimer's disease, Parkinson's disease, Multiple sclerosis, and Amyotrophic lateral sclerosis. The exact role of Malassezia in these disorders is unknown, but its ability to infect human cells, travel through the bloodstream, cross the blood-brain barrier, and reside along with the lipid-rich neuronal cells are potential mechanisms responsible for pathogenesis. This also includes the induction of pro-inflammatory cytokines, disruption of the blood-brain barrier, gut-microbe interaction, and accumulation of metabolic changes in the brain environment. In this review, we discuss these key findings from studies linking Malassezia to neurological disorders, emphasizing the complex and multifaceted nature of these cases. Furthermore, we discuss potential mechanisms through which Malassezia might contribute to the development of neurological conditions. Future investigations will open up new avenues for our understanding of the fungal gut-brain axis and how it influences human behavior. Collaborative research efforts among microbiologists, neuroscientists, immunologists, and clinicians hold promise for unraveling the enigmatic connections between human commensal Malassezia and neurological disorders.
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Affiliation(s)
- Bharati Naik
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Jayaprakash Sasikumar
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Shankar Prasad Das
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India.
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3
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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] [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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4
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Goswami K, Clarkson S, Tipton C, Phillips CD, Dennis DA, Klatt BA, O'Malley M, Smith EL, Gililland J, Pelt CE, Peters CL, Malkani AL, Palumbo BT, Lyons ST, Bernasek TL, Minter J, Goyal N, Purtill W, McDonald JF, Cross MB, Prieto HA, Lee GC, Hansen EN, Bini SA, Ward DT, Zhao N, Shohat N, Higuera CA, Nam D, Della Valle CJ, Parvizi J. The Microbiome of Osteoarthritic Hip and Knee Joints: A Prospective Multicenter Investigation. J Bone Joint Surg Am 2023; Publish Ahead of Print:00004623-990000000-00799. [PMID: 37192280 DOI: 10.2106/jbjs.22.00594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
BACKGROUND Recent advances in high-throughput DNA sequencing technologies have made it possible to characterize the microbial profile in anatomical sites previously assumed to be sterile. We used this approach to explore the microbial composition within joints of osteoarthritic patients. METHODS This prospective multicenter study recruited 113 patients undergoing hip or knee arthroplasty between 2017 and 2019. Demographics and prior intra-articular injections were noted. Matched synovial fluid, tissue, and swab specimens were obtained and shipped to a centralized laboratory for testing. Following DNA extraction, microbial 16S-rRNA sequencing was performed. RESULTS Comparisons of paired specimens indicated that each was a comparable measure for microbiological sampling of the joint. Swab specimens were modestly different in bacterial composition from synovial fluid and tissue. The 5 most abundant genera were Escherichia, Cutibacterium, Staphylococcus, Acinetobacter, and Pseudomonas. Although sample size varied, the hospital of origin explained a significant portion (18.5%) of the variance in the microbial composition of the joint, and corticosteroid injection within 6 months before arthroplasty was associated with elevated abundance of several lineages. CONCLUSIONS The findings revealed that prior intra-articular injection and the operative hospital environment may influence the microbial composition of the joint. Furthermore, the most common species observed in this study were not among the most common in previous skin microbiome studies, suggesting that the microbial profiles detected are not likely explained solely by skin contamination. Further research is needed to determine the relationship between the hospital and a "closed" microbiome environment. These findings contribute to establishing the baseline microbial signal and identifying contributing variables in the osteoarthritic joint, which will be valuable as a comparator in the contexts of infection and long-term arthroplasty success. LEVEL OF EVIDENCE Diagnostic Level II. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Karan Goswami
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Samuel Clarkson
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Craig Tipton
- Department of Biological Sciences, Texas Tech University, Lubbock, Texas
| | - Caleb D Phillips
- Department of Biological Sciences, Texas Tech University, Lubbock, Texas
| | | | - Brian A Klatt
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Michael O'Malley
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Eric L Smith
- New England Baptist Hospital, Chestnut Hill, Massachusetts
| | - Jeremy Gililland
- Department of Orthopaedics, University of Utah, Salt Lake City, Utah
| | | | | | - Arthur L Malkani
- University of Louisville Adult Reconstruction Program, Louisville, Kentucky
| | - Brian T Palumbo
- University of South Florida Department of Orthopaedic Surgery, Clearwater, Florida
| | - Steven T Lyons
- University of South Florida Department of Orthopaedic Surgery, Clearwater, Florida
| | - Thomas L Bernasek
- University of South Florida Department of Orthopaedic Surgery, Clearwater, Florida
| | | | - Nitin Goyal
- Anderson Orthopaedic Research Institute, Alexandria, Virginia
| | - William Purtill
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | | | | | - Hernan A Prieto
- Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, Florida
| | - Gwo-Chin Lee
- Penn Presbyterian Medical Center, Philadelphia, Pennsylvania
| | - Erik N Hansen
- University of California San Francisco, San Francisco, California
| | - Stefano A Bini
- University of California San Francisco, San Francisco, California
| | - Derek T Ward
- University of California San Francisco, San Francisco, California
| | - Neil Zhao
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Noam Shohat
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Carlos A Higuera
- Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
| | - Dennis Nam
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois
| | - Craig J Della Valle
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois
| | - Javad Parvizi
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
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5
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Dagar S, Singh J, Saini A, Kumar Y, Chhabra S, Minz RW, Rani L. Gut bacteriome, mycobiome and virome alterations in rheumatoid arthritis. Front Endocrinol (Lausanne) 2023; 13:1044673. [PMID: 36699026 PMCID: PMC9868751 DOI: 10.3389/fendo.2022.1044673] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 12/20/2022] [Indexed: 01/11/2023] Open
Abstract
Rheumatoid arthritis (RA) is a chronic destructive autoimmune disease of the joints which causes significant pain, functional disability, and mortality. Although aberrant immune cell activation induced by the imbalance between T helper Th1/Th17 and Treg cells is implicated in the RA development, its etiopathogenesis remains unclear. The presence of mucosal inflammation and systemic IgA-isotype-autoantibodies (anti-citrullinated peptide antibodies and rheumatoid factor) in pre-clinical RA supports the mucosal origin hypothesis involving altered microbiota in disease development. The gut microbiota comprises diverse bacteria, fungal and viral components, which are critical in developing host immunity. Alterations in microbial abundance are known to exacerbate or attenuate immune responses in the gut microenvironment subsequently affecting the joints. Further, these changes can provide biomarkers for disease activity and outcome in RA. Most of the research till date has been focused on describing gut bacterial components in RA. Studies on gut mycobiome and virome components in RA are relatively new and burgeoning field. Given the paucity of mycobiome or virome specific studies in RA, this review, discusses the recent findings on alterations in gut bacterial, fungal, and viral components as well as their role in regulating the spectrum of immune-pathogenic events occurring in RA which might be explored in future as a potential therapeutic target. Further, we provide an overview on inter-kingdom interactions between bacteria, fungi, and viruses in RA. The current understanding on gut microbiota modulation for managing RA is also summarised.
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Affiliation(s)
| | | | | | | | | | | | - Lekha Rani
- Department of Immunopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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6
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Kohno Y, Mizuno M, Endo K, Ozeki N, Katano H, Matsumoto M, Kaneko H, Takazawa Y, Koga H, Sekiya I. Yields of mesenchymal stromal cells from synovial fluid reflect those from synovium in patients with rheumatoid arthritis. Tissue Cell 2022; 75:101727. [PMID: 34998163 DOI: 10.1016/j.tice.2021.101727] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 01/02/2023]
Abstract
The yield of primary synovial mesenchymal stromal cells (MSCs) from synovium of patients with rheumatoid arthritis (RA) is highly variable, but cell transplantation therapy with autologous synovial MSCs requires accurate prediction of the synovial MSC yield per synovium weight. Here, we determined whether the yield of synovial fluid MSCs might predict the ultimate yield of primary MSCs from the synovium of RA knees. Synovial fluid and synovium were harvested during total knee arthroplasty from the knee joints of 10 patients with RA. Synovial fluid (1.5 mL) was diluted fourfold and plated equally into six 60 cm2 dishes. Nucleated cells from digested synovium were similarly plated at 1 × 104 cells in 6 dishes. All dishes were cultured for 14 days and analyzed for MSC yields and properties, including in vitro chondrogenesis. The cultured synovial cell number was correlated with the cultured synovial fluid cell number (n = 10, R2 = 0.64, p < 0.01). Synovial fluid cells formed cell colonies and showed MSC-like surface epitopes and multi-differentiation potential. However, the cartilage pellet weight indicated a greater chondrogenic potential of the synovial MSCs (n = 8). The primary MSC yields from synovial fluid and synovium were correlated, indicating that the synovial fluid MSC yield can predict the ultimate synovial MSC yield.
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Affiliation(s)
- Yuji Kohno
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Mitsuru Mizuno
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Kentaro Endo
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Nobutake Ozeki
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Hisako Katano
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Mikio Matsumoto
- Department of Orthopaedics, Juntendo University School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Haruka Kaneko
- Department of Orthopaedics, Juntendo University School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Yuji Takazawa
- Department of Orthopaedics, Juntendo University School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Ichiro Sekiya
- Center for Stem Cells and Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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7
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Sun X, Wang Y, Li X, Wang M, Dong J, Tang W, Lei Z, Guo Y, Li M, Li Y. Alterations of gut fungal microbiota in patients with rheumatoid arthritis. PeerJ 2022; 10:e13037. [PMID: 35251791 PMCID: PMC8896017 DOI: 10.7717/peerj.13037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 02/09/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a systemic autoimmune disease, in addition, gut microbiota plays an important role in the etiology of RA. However, our understanding of alterations to the gut fungal microbiota in Chinese population with RA is still limited. METHODS Serum samples were obtained from 62 patients with RA, and 39 age- and gender-matched healthy controls (HCs). Fecal samples were obtained from 42 RA patients and 39 HCs. Fecal fungal microbiota targeting internal transcribed spacer region 2 (ITS2) rRNA genes was investigated using MiSeq sequencing, as well as their associations with some diagnostic biomarkers for RA. RESULTS Our results showed that the fungal diversity did not alter in RA patients but taxonomic composition of the fecal fungal microbiota did. The gut mycobiota of RA patients was characterized by decreased abundance of Pholiota, Scedosporium, and Trichosporon. The linear discriminant analysis (LDA) effect size analysis (LEfSe) analysis identified several RA-enriched fungal genera, which were positively correlated with most RA biomarkers. Furthermore, since RA is an age- and gende-related disease, we classified RA patients into subgroups with age and gender and analyzed the sequencing results. Our data demonstrated that Wallemia and Irpex were the most discriminatory against RA patients over 60 years old, while Pseudeurotiaceae was the most discriminatory against female RA patients. CONCLUSIONS The case-control study presented here confirmed the alterations of gut fungal microbiota in Chinese patients with RA, and we speculated that the fungal dysbiosis may contribute to RA development.
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Affiliation(s)
- Xiaoyu Sun
- First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Yushuang Wang
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Xinke Li
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Meiling Wang
- Dalian Municipal Central Hospital, Dalian, Liaoning, China
| | - Jianyi Dong
- Laboratory Animal Center, Dalian Medical University, Dalian, Liaoning, China
| | - Wei Tang
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Zengjie Lei
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Yuling Guo
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Ming Li
- College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China
| | - Yuyuan Li
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, Liaoning, China
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8
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Berthelot JM, Bandiaky ON, Le Goff B, Amador G, Chaux AG, Soueidan A, Denis F. Another Look at the Contribution of Oral Microbiota to the Pathogenesis of Rheumatoid Arthritis: A Narrative Review. Microorganisms 2021; 10:59. [PMID: 35056507 PMCID: PMC8778040 DOI: 10.3390/microorganisms10010059] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 12/17/2021] [Accepted: 12/23/2021] [Indexed: 12/17/2022] Open
Abstract
Although autoimmunity contributes to rheumatoid arthritis (RA), several lines of evidence challenge the dogma that it is mainly an autoimmune disorder. As RA-associated human leukocyte antigens shape microbiomes and increase the risk of dysbiosis in mucosae, RA might rather be induced by epigenetic changes in long-lived synovial presenting cells, stressed by excessive translocations into joints of bacteria from the poorly cultivable gut, lung, or oral microbiota (in the same way as more pathogenic bacteria can lead to "reactive arthritis"). This narrative review (i) lists evidence supporting this scenario, including the identification of DNA from oral and gut microbiota in the RA synovium (but in also healthy synovia), and the possibility of translocation through blood, from mucosae to joints, of microbiota, either directly from the oral cavity or from the gut, following an increase of gut permeability worsened by migration within the gut of oral bacteria such as Porphyromonas gingivalis; (ii) suggests other methodologies for future works other than cross-sectional studies of periodontal microbiota in cohorts of patients with RA versus controls, namely, longitudinal studies of oral, gut, blood, and synovial microbiota combined with transcriptomic analyses of immune cells in individual patients at risk of RA, and in overt RA, before, during, and following flares of RA.
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Affiliation(s)
- Jean-Marie Berthelot
- Rheumatology Unit, Nantes University Hospital, Place Alexis Ricordeau, CEDEX 01, 44093 Nantes, France; (J.-M.B.); (B.L.G.)
| | - Octave Nadile Bandiaky
- Division of Fixed Prosthodontics, University of Nantes, 1 Place Alexis Ricordeau, 44042 Nantes, France;
| | - Benoit Le Goff
- Rheumatology Unit, Nantes University Hospital, Place Alexis Ricordeau, CEDEX 01, 44093 Nantes, France; (J.-M.B.); (B.L.G.)
| | - Gilles Amador
- Department of Dental Public Health, Faculty of Dental Surgery, University of Nantes, 44093 Nantes, France;
- Nantes Teaching Hospital, 44000 Nantes, France;
| | - Anne-Gaelle Chaux
- Nantes Teaching Hospital, 44000 Nantes, France;
- Department of Oral Surgery, Faculty of Dental Surgery, University of Nantes, 44000 Nantes, France
| | - Assem Soueidan
- Department of Periodontology, Faculty of Dental Surgery, UIC 11, Rmes U1229, CHU de Nantes, 44000 Nantes, France;
| | - Frederic Denis
- Department of Dental Public Health, Faculty of Dental Surgery, University of Nantes, 44093 Nantes, France;
- Tours Teaching Hospital, 37000 Tours, France
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9
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Verdecia J, Ramsubeik KP, Ravi M. Pseudoseptic Arthritis in a Patient With Psoriasis. Cureus 2021; 13:e19185. [PMID: 34873525 PMCID: PMC8635465 DOI: 10.7759/cureus.19185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2021] [Indexed: 11/23/2022] Open
Abstract
A 42-year-old male with a history of untreated psoriasis and a previous episode of presumed left knee septic arthritis developed sudden onset of left knee pain, swelling, and a moderate effusion. The pathogen could not be isolated despite extensive inflammation seen in synovial fluid (SF) and synovial tissue biopsy. Whether this is culture-negative septic arthritis or pseudo-septic arthritis is the enigma, given the limited sensitivity of current available SF microbiologic testing. We present a challenging and stimulating case with no current guidelines for an optimal empiric antibiotic regimen or anti-inflammatory therapy.
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Affiliation(s)
- Jorge Verdecia
- Internal Medicine, University of Florida College of Medicine - Jacksonville, Jacksonville, USA
| | - Karishma P Ramsubeik
- Rheumatology, University of Florida College of Medicine - Jacksonville, Jacksonville, USA
| | - Malleswari Ravi
- Infectious Disease, University of Florida College of Medicine - Jacksonville, Jacksonville, USA.,Infectious Disease, University of Florida, Jacksonville, Jacksonville, USA
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10
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Mo XB, Dong CY, He P, Wu LF, Lu X, Zhang YH, Deng HW, Deng FY, Lei SF. Alteration of circulating microbiome and its associated regulation role in rheumatoid arthritis: Evidence from integration of multiomics data. Clin Transl Med 2020; 10:e229. [PMID: 33252855 PMCID: PMC7668190 DOI: 10.1002/ctm2.229] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/27/2020] [Accepted: 11/02/2020] [Indexed: 12/15/2022] Open
Affiliation(s)
- Xing-Bo Mo
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Chen-Yue Dong
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Pei He
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Long-Fei Wu
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Xin Lu
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Yong-Hong Zhang
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China.,Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China
| | - Hong-Wen Deng
- Center of Bioinformatics and Genomics, Department of Global Biostatistics and Data Science, Tulane University, New Orleans, Louisiana
| | - Fei-Yan Deng
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
| | - Shu-Feng Lei
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, P. R. China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, Jiangsu, P. R. China
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11
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Identification and Characterization of the Intra-Articular Microbiome in the Osteoarthritic Knee. Int J Mol Sci 2020; 21:ijms21228618. [PMID: 33207573 PMCID: PMC7697780 DOI: 10.3390/ijms21228618] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/04/2020] [Accepted: 11/13/2020] [Indexed: 12/21/2022] Open
Abstract
Osteoarthritis (OA) is the most common joint disorder in the United States, and the gut microbiome has recently emerged as a potential etiologic factor in OA development. Recent studies have shown that a microbiome is present at joint synovia. Therefore, we aimed to characterize the intra-articular microbiome within osteoarthritic synovia and to illustrate its role in OA disease progression. RNA-sequencing data from OA patient synovial tissue was aligned to a library of microbial reference genomes to identify microbial reads indicative of microbial abundance. Microbial abundance data of OA and normal samples was compared to identify differentially abundant microbes. We computationally explored the correlation of differentially abundant microbes to immunological gene signatures, immune signaling pathways, and immune cell infiltration. We found that microbes correlated to OA are related to dysregulation of two main functional pathways: increased inflammation-induced extracellular matrix remodeling and decreased cell signaling pathways crucial for joint and immune function. We also confirmed that the differentially abundant and biologically relevant microbes we had identified were not contaminants. Collectively, our findings contribute to the understanding of the human microbiome, well-known OA risk factors, and the role microbes play in OA pathogenesis. In conclusion, we present previously undiscovered microbes implicated in the OA disease progression that may be useful for future treatment purposes.
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12
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Guo X, Chen G. Hypoxia-Inducible Factor Is Critical for Pathogenesis and Regulation of Immune Cell Functions in Rheumatoid Arthritis. Front Immunol 2020; 11:1668. [PMID: 32849577 PMCID: PMC7399093 DOI: 10.3389/fimmu.2020.01668] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/22/2020] [Indexed: 12/16/2022] Open
Abstract
Rheumatoid arthritis (RA) is a common autoimmune disease with characteristics of synovial inflammation, pannus formation, cartilage destruction, and bone erosion. Further, the inflammation is linked to increased oxygen consumption, resulting in hypoxia within the inflammatory area. Hypoxia-inducible factor (HIF) was reported to be associated with adaptation to the hypoxic microenvironment in the RA synovium. Here, we have briefly summarized the structure and expression of HIF. Moreover, the function of HIF in inflammation, angiogenesis, cartilage damage, and immune cells of RA has been discussed.
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Affiliation(s)
- Xin Guo
- Department of Immunology and Microbiology, Shanghai JiaoTong University School of Medicine, Shanghai Institute of Immunology, Shanghai, China
| | - Guangjie Chen
- Department of Immunology and Microbiology, Shanghai JiaoTong University School of Medicine, Shanghai Institute of Immunology, Shanghai, China
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