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Kinashi Y, Tanaka K, Kimura S, Hirota M, Komiyama S, Shindo T, Hashiguchi A, Takahashi D, Shibata S, Karaki SI, Ohno H, Hase K. Intestinal epithelium dysfunctions cause IgA deposition in the kidney glomeruli of intestine-specific Ap1m2-deficient mice. EBioMedicine 2024; 106:105256. [PMID: 39059316 PMCID: PMC11338063 DOI: 10.1016/j.ebiom.2024.105256] [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: 02/01/2024] [Revised: 07/03/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND Intestinal epithelial cells (IECs) serve as robust barriers against potentially hostile luminal antigens and commensal microbiota. Epithelial barrier dysfunction enhances intestinal permeability, leading to leaky gut syndrome (LGS) associated with autoimmune and chronic inflammatory disorders. However, a causal relationship between LGS and systemic disorders remains unclear. Ap1m2 encodes clathrin adaptor protein complex 1 subunit mu 2, which facilitates polarized protein trafficking toward the basolateral membrane and contributes to the establishment of epithelial barrier functions. METHODS We generated IEC-specific Ap1m2-deficient (Ap1m2ΔIEC) mice with low intestinal barrier integrity as an LSG model and examined the systemic impact. FINDINGS Ap1m2ΔIEC mice spontaneously developed IgA nephropathy (IgAN)-like features characterized by the deposition of IgA-IgG immune complexes and complement factors in the kidney glomeruli. Ap1m2 deficiency markedly enhanced aberrantly glycosylated IgA in the serum owing to downregulation and mis-sorting of polymeric immunoglobulin receptors in IECs. Furthermore, Ap1m2 deficiency caused intestinal dysbiosis by attenuating IL-22-STAT3 signaling. Intestinal dysbiosis contributed to the pathogenesis of IgAN because antibiotic treatment reduced aberrantly glycosylated IgA production and renal IgA deposition in Ap1m2ΔIEC mice. INTERPRETATION IEC barrier dysfunction and subsequent dysbiosis by AP-1B deficiency provoke IgA deposition in the mouse kidney. Our findings provide experimental evidence of a pathological link between LGS and IgAN. FUNDING AMED, AMED-CREST, JSPS Grants-in-Aid for Scientific Research, JST CREST, Fuji Foundation for Protein Research, and Keio University Program for the Advancement of Next Generation Research Projects.
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Affiliation(s)
- Yusuke Kinashi
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Keisuke Tanaka
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Shunsuke Kimura
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan.
| | - Masato Hirota
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Seiga Komiyama
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Tomoko Shindo
- Electron Microscope Laboratory, Keio University School of Medicine, Tokyo, Japan
| | - Akinori Hashiguchi
- Electron Microscope Laboratory, Keio University School of Medicine, Tokyo, Japan; Depatment of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Daisuke Takahashi
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan
| | - Shinsuke Shibata
- Electron Microscope Laboratory, Keio University School of Medicine, Tokyo, Japan; Division of Microscopic Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Shin-Ichiro Karaki
- Laboratory of Physiology, Department of Environmental and Life Sciences, University of Shizuoka, Shizuoka, Japan
| | - Hiroshi Ohno
- RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan; Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, Kanagawa, Japan; Laboratory for Immune Regulation, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Science, Keio University, Tokyo, Japan; Institute of Fermentation Sciences (IFeS), Faculty of Food and Agricultural Sciences, Fukushima University, Fukushima, Japan; International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo (IMSUT), Tokyo, Japan.
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Isogai E, Iwazu Y, Akimoto T, Kuro-O M, Niki T, Nagata D. A case of paraneoplastic IgA nephropathy with glomerular capillary IgA and galactose-deficient IgA1 deposition. CEN Case Rep 2024; 13:104-109. [PMID: 37434086 PMCID: PMC10982149 DOI: 10.1007/s13730-023-00807-5] [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: 02/08/2023] [Accepted: 06/30/2023] [Indexed: 07/13/2023] Open
Abstract
Paraneoplastic IgA nephropathy (IgAN) is an underrecognized condition in which malignancy manifests as symptoms of IgAN, and it remains controversial regarding their mechanistic relation between IgAN and malignancy. Herein, we report a case of a 68-year-old Japanese man with glottic cancer who developed nephrotic syndrome as a clinical manifestation of IgAN. Renal biopsy revealed diffuse proliferative glomerulonephritis with glomerular capillary IgA deposition that is a rare subtype of IgAN. After complete remission of the glottic cancer by irradiation, proteinuria and hematuria disappeared. Based on his clinical course, we diagnosed paraneoplastic IgAN. Therefore, we should consider the possibility that IgAN with glomerular capillary IgA deposition might be paraneoplastic glomerulopathy especially before initiating immunosuppressive therapy. The patient thereafter developed prostate cancer and hepatocellular cancer, but IgAN did not recur. The association of IgAN specifically with the glottic cancer in this triple-cancer patient may suggest a potential link between IgAN and mucosal cancer. Because galactose-deficient IgA1 (Gd-IgA1) was observed in the similar pattern as IgA, Gd-IgA1 also may play an important role in the pathogenesis of paraneoplastic IgAN.
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Affiliation(s)
- Erika Isogai
- Division of Anti-Ageing Medicine, Center for Molecular Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Yoshitaka Iwazu
- Division of Anti-Ageing Medicine, Center for Molecular Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.
| | - Tetsu Akimoto
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Makoto Kuro-O
- Division of Anti-Ageing Medicine, Center for Molecular Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Toshiro Niki
- Department of Integrative Pathology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Daisuke Nagata
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
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Rab11-FIP1 and Rab11-FIP5 Regulate pIgR/pIgA Transcytosis through TRIM21-Mediated Polyubiquitination. Int J Mol Sci 2021; 22:ijms221910466. [PMID: 34638806 PMCID: PMC8508952 DOI: 10.3390/ijms221910466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 01/01/2023] Open
Abstract
Polymeric immunoglobulin receptor (pIgR)-mediated polymeric immunoglobulin A (pIgA) transcytosis across mucosal epithelial cells plays an essential role in mucosal immunity. The general trafficking process has been well investigated, yet the elaborate regulatory mechanisms remain enigmatic. We identified a new pIgR interacting protein, the Rab11 effector Rab11-FIP1. Rab11-FIP1 and Rab11-FIP5 knockdown additively impaired pIgA transcytosis in both polarized and incompletely polarized cells. Moreover, Rab11-FIP1 and Rab11-FIP5 knockdown exhibited more significant inhibitory effects on pIgA transcytosis in incompletely polarized cells than in polarized cells. Interestingly, the trafficking process of pIgA in incompletely polarized cells is distinct from that in polarized cells. In incompletely polarized cells, the endocytic pIgR/pIgA was first transported from the basolateral plasma membrane to the vicinity of the centrosome where Rab11-FIP1 and Rab11-FIP5 bound to it, before the Rab11a-positive endosomes containing pIgR/pIgA, Rab11-FIP1 and Rab11-FIP5 were further transported to the apical plasma membrane via Golgi apparatus. During the trafficking process, TRIM21 mediated the K11-linked polyubiquitination of Rab11-FIP1 and the K6-linked polyubiquitination of Rab11-FIP5 to promote their activation and pIgA transcytosis. This study indicates that polyubiquitinated Rab11-FIP1 and Rab11-FIP5 mediated by TRIM21 cooperatively facilitate pIgA transcytosis and provides new insights into the intracellular trafficking process of pIgA in incompletely polarized cells.
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Qi X, Li X, Sun X. Reduced expression of polymeric immunoglobulin receptor (pIgR) in nasopharyngeal carcinoma and its correlation with prognosis. Tumour Biol 2016; 37:11099-104. [PMID: 26910773 DOI: 10.1007/s13277-016-4791-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 01/06/2016] [Indexed: 12/26/2022] Open
Abstract
Polymeric immunoglobulin receptor (pIgR) is a key component of the mucosal immune system that mediates epithelial transcytosis of immunoglobulins. The expression of pIgR was reported to be up-regulated and related to the prognosis of several human cancers. However, the clinical significance of pIgR in nasopharyngeal carcinoma (NPC) remains unclear. The purpose of this study was to detect the pIgR expression and its prognostic value in NPC. The expression of serum pIgR was measured in NPC patients and healthy controls by real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and western blotting analyses. The relationship between its expression and clinical factors was analyzed by chi-square test. Then, the overall survival of patients was assessed by Kaplan-Meier analysis while the prognostic value of serum pIgR was estimated using univariate and multivariate analyses with cox regression analysis. Serum pIgR was down-regulated in NPC patients compared to that in healthy controls both at messenger RNA (mRNA) and protein levels. Especially, its expression was also significantly lower in patients at advantage stages (III-IV) than those at early stages (I-II). And, the low pIgR expression was strongly associated with advanced clinical stages, T stage, N stage, and distant metastasis. Kaplan-Meier analysis demonstrated that patients with low pIgR expression had a significantly shorter overall survival than those with high expression at any stages. Cox regression analysis suggested that pIgR was closely related to the prognosis of NPC. Serum pIgR expression was reduced in NPC, and it could be an independent prognostic predictor for patients with this cancer.
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Affiliation(s)
- Xuanchang Qi
- Department of Otorhinolaryngology, The Affiliated Hospital of Weifang Medical College, Weifang, 261000, Shandong, China
| | - Xuechang Li
- Department of Otorhinolaryngology, Weifang People's Hospital, Weifang, 261041, Shandong, China
| | - Xiuxia Sun
- Department of Otorhinolaryngology, The Affiliated Hospital of Weifang Medical College, Weifang, 261000, Shandong, China.
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Hupin C, Rombaux P, Bowen H, Gould H, Lecocq M, Pilette C. Downregulation of polymeric immunoglobulin receptor and secretory IgA antibodies in eosinophilic upper airway diseases. Allergy 2013; 68:1589-97. [PMID: 24117840 DOI: 10.1111/all.12274] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2013] [Indexed: 12/15/2022]
Abstract
BACKGROUND Immunoglobulin (Ig) A represents a first-line defence mechanism in the airways, but little is known regarding its implication in upper airway disorders. This study aimed to address the hypothesis that polymeric Ig receptor (pIgR)-mediated secretory IgA immunity could be impaired in chronic upper airway diseases. METHODS Nasal and ethmoidal biopsies, as well as nasal secretions, were collected from patients with chronic rhinosinusitis (CRS) with nasal polyps (CRSwNP) or without nasal polyps (CRSsNP), allergic rhinitis (AR) and controls, and assayed for IgA1/IgA2 synthesis, pIgR expression, production of secretory component (SC), IgA and relevant IgA antibodies, and correlated with local eosinophils and inflammatory features (IL-12, IL-13 and ECP). RESULTS pIgR expression was decreased in the ethmoidal mucosa in patients with CRSwNP (P = 0.003) and in AR (P = 0.006). This pIgR defect was associated with reduced levels of SC (P = 0.007) and IgA antibodies to Staphylococcus aureus enterotoxin B (SAEB) (P = 0.003) in nasal secretions from patients with CRSwNP, and with increased IgA deposition in subepithelial areas. pIgR downregulation was selectively observed in patients with tissue eosinophilia, whilst no clear relation to smoking history was observed. CONCLUSION Epithelial pIgR expression is decreased in patients with CRSwNP and AR and results in decreased SC and IgA antibodies to certain bacterial antigens (SAEB) in nasal secretions of patients with CRSwNP in parallel to subepithelial accumulation of IgA. This defect in mucosal immunity is associated with eosinophilic, Th2-related inflammation.
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Affiliation(s)
- C. Hupin
- Institut de Recherche Expérimentale et Clinique (IREC); Pole de Pneumologie; ORL & Dermatologie; Université catholique de Louvain (UCL); Brussels Belgium
- Service d'ORL; Cliniques Universitaires St-Luc; Brussels Belgium
| | - P. Rombaux
- Institut de Recherche Expérimentale et Clinique (IREC); Pole de Pneumologie; ORL & Dermatologie; Université catholique de Louvain (UCL); Brussels Belgium
- Service d'ORL; Cliniques Universitaires St-Luc; Brussels Belgium
| | - H. Bowen
- Randall Division of Cell and Molecular Biophysics; MRC/Asthma UK Centre in Allergic Mechanisms of Asthma; King's College London; London UK
| | - H. Gould
- Randall Division of Cell and Molecular Biophysics; MRC/Asthma UK Centre in Allergic Mechanisms of Asthma; King's College London; London UK
| | - M. Lecocq
- Institut de Recherche Expérimentale et Clinique (IREC); Pole de Pneumologie; ORL & Dermatologie; Université catholique de Louvain (UCL); Brussels Belgium
| | - C. Pilette
- Institut de Recherche Expérimentale et Clinique (IREC); Pole de Pneumologie; ORL & Dermatologie; Université catholique de Louvain (UCL); Brussels Belgium
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Sunagawa K, Omagari D, Nishiyama M, Asano M, Okudera M, Sugitani M, Nemoto N, Komiyama K. Distinct Functional Regions of the Human Polymeric Immunoglobulin Receptor. Scand J Immunol 2013; 78:339-44. [DOI: 10.1111/sji.12093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 06/22/2013] [Indexed: 11/26/2022]
Affiliation(s)
- K. Sunagawa
- Department of Pathology Nihon University School of Medicine Tokyo Japan
| | - D. Omagari
- Department of Pathology Nihon University School of Dentistry Tokyo Japan
- Division of Immunology and Pathobiology Nihon University School of Dentistry Tokyo Japan
| | - M. Nishiyama
- Division of Oral Health Sciences Nihon University Graduate School of Dentistry Tokyo Japan
| | - M. Asano
- Department of Pathology Nihon University School of Dentistry Tokyo Japan
- Division of Immunology and Pathobiology Nihon University School of Dentistry Tokyo Japan
| | - M. Okudera
- Department of Pathology Nihon University School of Dentistry Tokyo Japan
- Division of Oral Health Sciences Nihon University Graduate School of Dentistry Tokyo Japan
| | - M. Sugitani
- Department of Pathology Nihon University School of Medicine Tokyo Japan
| | - N. Nemoto
- Department of Pathology Nihon University School of Medicine Tokyo Japan
| | - K. Komiyama
- Department of Pathology Nihon University School of Dentistry Tokyo Japan
- Division of Immunology and Pathobiology Nihon University School of Dentistry Tokyo Japan
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