title: PLA2R antibodies and PLA2R glomerular deposits in psoriasis patients with membranous nephropathy.
abstract: The association between psoriasis and membranous nephropathy (MN) remains largely unclear. We examined the prevalence of serum PLA2R antibody and characterized the expression of PLA2R and THSD7A in glomeruli in patients with MN and psoriasis.
  
  
  
  A total of 24 patients with MN without evidence of a secondary cause except psoriasis were enrolled. The clinical and pathological features were retrospectively analyzed. Serum anti-PLA2R antibody was measured using IFA Mosaic. Renal tissue samples stored in the laboratory bio-bank were used for PLA2R staining under immunofluorescence microscopy and THSD7A immunohistochemical analysis.
  
  
  
  Twenty-four patients (21 male and 3 female) with a mean age of 43.6 ± 15.7 years old were enrolled. Serum anti-PLA2R antibody was positive in 7 patients, which was significantly lower than the positivity observed in idiopathic MN (29.2% vs. 81.7%, P < 0.001). Glomerular PLA2R staining was positive in 7 patients with positive serum anti-PLA2R antibody. THSD7A staining was negative in all 24 patients. During the follow-up visits, 13 patients with negative serum PLA2R antibody achieved CR. In contrast, CR was only achieved in 1 patient with positive serum PLA2R antibody, PR was achieved in 2 patients.
  
  
  
  The prevalence of serum anti-PLA2R antibody and glomerular expression of PLA2R was significantly lower in patients with psoriasis and MN than in those with idiopathic MN, and THSD7A staining was negative, suggesting that MN is associated with psoriasis in the majority of patients. However, idiopathic MN might also accompany psoriasis in a minority of psoriatic patients with positive serum anti-PLA2R antibody.
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China. gyc_626828@126.com.
authors.forename: Yong-Chun
authors.initials: YC
authors.lastname: Ge
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Jin
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Cai-Hong
authors.initials: CH
authors.lastname: Zeng
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Ming-Chao
authors.initials: MC
authors.lastname: Zhang
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Da-Cheng
authors.initials: DC
authors.lastname: Chen
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Ru
authors.initials: R
authors.lastname: Yin
authors.affiliation: National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, 210016, People's Republic of China.
authors.forename: Wei-Bo
authors.initials: WB
authors.lastname: Le
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001323:Autoantibodies / Q000097:blood*; D005260:Female; D015433:Glomerulonephritis, Membranous / Q000150:complications / Q000188:drug therapy / Q000378:metabolism*; D006801:Humans; D007678:Kidney Glomerulus / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D011507:Proteinuria / Q000209:etiology; D011565:Psoriasis / Q000097:blood* / Q000150:complications / Q000188:drug therapy; D054507:Receptors, Phospholipase A2 / Q000276:immunology* / Q000378:metabolism*; D012189:Retrospective Studies; D019699:Thrombospondins / Q000378:metabolism; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D001323:Autoantibodies; C516360:PLA2R1 protein, human; D054507:Receptors, Phospholipase A2; C546399:THSD7A protein, human; D019699:Thrombospondins
keywords: Membranous nephropathy; PLA2R; Psoriasis; Renal biopsy; THSD7A