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  • Title: Campylobacter rectus in the Oral Cavity Correlates with Proteinuria in Immunoglobulin A Nephropathy Patients.
    Author: Misaki T, Naka S, Wato K, Hatakeyama R, Nagasawa Y, Ito S, Inaba H, Nomura R, Matsumoto-Nakano M, Nakano K.
    Journal: Nephron; 2018; 139(2):143-149. PubMed ID: 29428934.
    Abstract:
    BACKGROUND: Periodontitis-related pathogens, such as Campylobacter or Treponema species, have recently been shown to be associated with immunoglobulin A nephropathy (IgAN). Some strains of Streptococcus mutans, a major pathogen of dental caries, harbour the cnm gene that encodes a collagen-binding protein (Cnm). This has also been demonstrated to be associated with urinary protein levels in IgAN patients. OBJECTIVES: The purpose of the present study was to analyse the association of IgAN with C. rectus, Treponema denticola and cnm-positive S. mutans in the oral cavity of humans. METHODS: The presence of C. rectus, T. denticola and cnm-positive S. mutans strains in saliva samples of 117 IgAN patients and 56 healthy controls was evaluated by PCR, and the subjects' clinical parameters were analysed. RESULTS: C. rectus was significantly more prevalent in the IgAN group than in the control group (p < 0.05). The C. rectus-positive group was significantly associated with proteinuria in the IgAN group (p < 0.05). In addition, the C. rectus-positive and cnm-positive S. mutans group was shown to be more closely associated with urinary protein levels than the other groups (p < 0.0083). CONCLUSION: Our results suggest that harbouring C. rectus in the oral cavity could be associated with proteinuria in IgAN patients.
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