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Genetic components have been reported to play an important role in the onset and development of CP. In the present study, we aimed to replicate the association signals of <jats:italic>NIN<\/jats:italic> and <jats:italic>SIGLEC5<\/jats:italic> identified in previous genome-wide association studies (GWASs) of samples from Chinese Han individuals. Association signals between clinical severity indicators of CP and relevant single nucleotide polymorphisms (SNPs) were also examined. A total of 3,160 study subjects, including 1,076 CP patients and 2,084 healthy controls, were recruited. A total of 32 SNPs, including 22 from <jats:italic>NIN<\/jats:italic> and 10 from <jats:italic>SIGLEC5<\/jats:italic>, were selected for genotyping. SNPs rs12883458 (OR\u2009=\u20091.45, <jats:italic>P<\/jats:italic>\u2009=\u20091.22\u2009\u00d7\u200910<jats:sup>\u22125<\/jats:sup>, <jats:italic>NIN<\/jats:italic>) and rs4284742 (OR\u2009=\u20090.75, <jats:italic>P<\/jats:italic>\u2009=\u20091.69\u2009\u00d7\u200910<jats:sup>\u22125<\/jats:sup>, <jats:italic>SIGLEC5<\/jats:italic>) were significantly associated with CP disease status. rs4284742 was significantly associated with all 3 clinical severity indicators, including bleeding on probing (BOP), probing depth (PD) and clinical attachment loss (CAL). According to evidence from bioinformatics analyses, both significant SNPs, rs12883458 and rs4284742, are likely surrogates of underlying variants with true effects. In summary, our findings provide direct evidence for the association of <jats:italic>NIN<\/jats:italic> and <jats:italic>SIGLEC5<\/jats:italic> with CP susceptibility.<\/jats:p>","DOI":"10.1038\/s41598-019-38632-5","type":"journal-article","created":{"date-parts":[[2019,2,14]],"date-time":"2019-02-14T11:03:38Z","timestamp":1550142218000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Genetic susceptibility of common polymorphisms in NIN and SIGLEC5 to chronic periodontitis"],"prefix":"10.1038","volume":"9","author":[{"given":"Hua","family":"Tong","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhuliang","family":"Wei","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Yin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bo","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tianxiao","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunni","family":"Deng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yali","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nan","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2019,2,14]]},"reference":[{"key":"38632_CR1","doi-asserted-by":"publisher","first-page":"138","DOI":"10.1111\/j.1600-0757.2010.00340.x","volume":"53","author":"A Stabholz","year":"2000","unstructured":"Stabholz, A., Soskolne, W. 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