Distribution of cytomegalovirus genotypes among ulcerative colitis patients in Okinawa, Japan

다국어 초록 (Multilingual Abstract)

Background/Aims: To determine the prevalence of glycoprotein B (gB), glycoprotein N (gN), and glycoprotein H (gH) genotypes of human cytomegalovirus (HCMV) superimposed on ulcerative colitis (UC) patients in Japan. Methods: Four archivedstool samples and 7-archived extracted DNA from stool samples of 11 UC patients with positive multiplex polymerase chainreaction (PCR) results for HCMV were used UL55 gene encoding gB, UL73 gene encoding gN, and UL75 gene encoding gH were identified by PCR. Genotypes of gB and glycoprotein N were determined by sequencing. Results: Among 11 samples, 8samples were amplified through PCR. gB, gN, and gH genotypes were successfully detected in 3 of 8 (37.5%), 4 of 8 (50%), and8 of 8 (100%), respectively. The distribution of gB and gN genotypes analyzed through phylogenetic analysis were as follows:gB1 (2/3, 66.7%), gB3 (1/3, 33.3%), gN3a (2/4, 50%), and gN3b (2/4, 50%). Other gB genotypes (gB2 and gB4) and gN genotypes(gN1, gN2, and gN4) were not detected in this study. Out of successfully amplified 8 samples of gH genotype, gH1 and gH2 weredistributed in 12.5% and 75% samples, respectively. Only 1 sample revealed mixed infection of gH genotype. The distribution ofgH1 and gH2 differed significantly (1:6, P <0.05) in UC patients. The distribution of single gH genotype also revealed significantdifference in UC patients who were treated with immunosuppressive drug (P <0.05). Conclusions: In this study, gB1, gN3, andgH2 gene were determined as the most frequently observed genotypes in UC patients, which suggest that there might be an association between these genotypes of HCMV and UC.

참고문헌 (Reference)

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