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Zhou H, Wang F, Wan J, Su S, Shi Y, Li X, Wu T, Liang J. Systematic Review and Meta-Analysis of Observational Studies on the Effectiveness and Safety of Ustekinumab among Patients with Inflammatory Bowel Disease in Eastern and Western Countries. J Clin Med 2023; 12:jcm12051894. [PMID: 36902681 PMCID: PMC10004158 DOI: 10.3390/jcm12051894] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/18/2023] [Accepted: 02/23/2023] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND Ustekinumab (UST) is an IL12/23 inhibitor utilized for altering inflammatory responses in inflammatory bowel disease (IBD). Clinical trials and case reports suggested that the effectiveness and safety of UST may differ among IBD patients in Eastern and Western countries. However, related data have not been systematically reviewed and analyzed. METHODS This systematic review and meta-analysis of the safety and effectiveness of UST in IBD included relevant literature from the Medline and Embase databases. The main outcomes were clinical response, clinical remission, endoscopic response, endoscopic remission, and adverse events in IBD. RESULTS We analyzed 49 real-world studies, most of which included patients with biological failure (89.1% CD and 97.1% UC). In UC patients, clinical remission rates were 34% at 12 weeks, 40% at 24 weeks, and 37% at 1 year. In CD patients, clinical remission rates were 46% at 12 weeks, 51% at 24 weeks, and 47% at 1 year. Clinical remission rates of CD patients were 40% at 12 weeks and 44% at 24 weeks in Western countries, versus 63% and 72% in Eastern countries, respectively. CONCLUSION UST is an effective drug for IBD with a promising safety profile. Although no RCTs have been performed in Eastern countries, the effectiveness of UST on CD patients is not inferior to that in Western countries based on the existing data.
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Affiliation(s)
- He Zhou
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
| | - Fang Wang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
| | - Jian Wan
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
| | - Song Su
- Department of Gastroenterology, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Yanting Shi
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
| | - Xiaofei Li
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
| | - Tong Wu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
- Correspondence: (T.W.); (J.L.)
| | - Jie Liang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an 710032, China
- Correspondence: (T.W.); (J.L.)
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Crohn's Disease Susceptibility and Onset Are Strongly Related to Three NOD2 Gene Haplotypes. J Clin Med 2021; 10:jcm10173777. [PMID: 34501225 PMCID: PMC8432186 DOI: 10.3390/jcm10173777] [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: 06/23/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 12/30/2022] Open
Abstract
The genetic background and the determinants influencing the disease form, course, and onset of inflammatory bowel disease (IBD) remain unresolved. We aimed to determine the NOD2 gene haplotypes and their relationship with IBD occurrence, clinical presentation, and onset, analyzing a cohort of 578 patients with IBD, including children, and 888 controls. Imaging or endoscopy with a histopathological confirmation was used to diagnose IBD. Genotyping was performed to assess the differences in genotypic and allelic frequencies. Linkage disequilibrium was analyzed, and associations between haplotypes and clinical data were evaluated. We emphasized the prevalence of risk alleles in all analyzed loci in patients with Crohn disease (CD). Interestingly, c.2722G>C and c.3019_3020insC alleles were also overrepresented in ulcerative colitis (UC). T-C-G-C-insC, T-C-G-T-insC, and T-T-G-T-wt haplotypes were correlated with the late-onset form of CD (OR = 23.01, 5.09, and 17.71, respectively), while T-T-G-T-wt and C-C-G-T-wt were prevalent only in CD children (OR = 29.36, and 12.93, respectively; p-value = 0.001). In conclusion, the presence of c.3019_3020insC along with c.802C>T occurred as the most fundamental contributing diplotype in late-onset CD form, while in CD children, the mutual allele in all predisposing haplotypes was the c.2798 + 158T. Identifying the unique, high-impact haplotypes supports further studies of the NOD2 gene, including haplotypic backgrounds.
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Siddique I, Mustafa AS, Khan I, Ziyab AH, Altarrah M, Sulaiman R, Kadungothayil N, Shaheed F. Detection of mutations in NOD2/CARD15 gene in Arab patients with Crohn's disease. Saudi J Gastroenterol 2021; 27:240-248. [PMID: 34380868 PMCID: PMC8448013 DOI: 10.4103/sjg.sjg_582_20] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Mutations in NOD2/CARD15 gene have been linked to an increased risk of Crohn's disease (CD). The objective of this study is to determine NOD2/CARD15 gene mutations, and their association with the risk of CD in Arabs in Kuwait. METHODS Four NOD2 gene mutations, including Pro268Ser (SNP5), Arg702Trp (SNP8), Gly908Arg (SNP12), and Leu1007FsinsC (SNP13) were examined in Arab CD patients (n = 103) and control subjects (n = 100). The genomic DNA was isolated and used in polymerase chain reaction (PCR) with four sets of specific primers. The PCR-amplified DNA fragments were sequenced and analyzed for the NOD2 mutations. Logistic regression was used to estimate the adjusted odds ratios (aOR) and 95% confidence intervals (CI). RESULTS Of the four genotyped variants, the Arg702Trp (SNP8) and Leu1007FsinsC (SNP13) variants were not informative in our study sample due to minor allele frequency of <1%. The Pro268Ser (SNP5) mutation was detected in 17 (16.5%) CD patients and 32 (32.0%) controls. The Gly908Arg (SNP12) mutation was observed in 24 (23.3%) patients and 10 (10.0%) controls. In the dominant genetic risk model (i.e. carrying at least one minor allele), CD patients compared to controls were less likely to carry either the "CT" or "TT" genotype of variant Pro268Ser (SNP5; aOR = 0.43, 95% CI: 0.22-0.84). In contrast, CD patients compared to controls were more likely to carry the homozygous for the minor allele or the heterozygous genotypes of variant Gly908Arg (SNP12; aOR = 2.67, 95% CI: 1.19-5.97). CONCLUSIONS In this Arab population, carrying at least one copy of the minor allele of Gly908Arg (SNP12) mutation in NOD2 gene was associated with increased susceptibility to CD, while having the heterozygous or homozygous for the minor allele genotype of the Pro268Ser (SNP5) mutation provided protection against CD. Mutations in Arg702Trp (SNP8) and Leu1007FsinsC (SNP13) were not detected in this sample of the Arab population in Kuwait.
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Affiliation(s)
- Iqbal Siddique
- Department of Medicine, Faculty of Medicine, Kuwait University, Kuwait City, Al-Amiri Hospital, Kuwait,Thunayan Al-Ghanim Gastroenterology Center, Al-Amiri Hospital, Kuwait,Address for correspondence: Prof. Iqbal Siddique, Department of Medicine, Faculty of Medicine, Kuwait University, P. O. Box 24923, Safat - 13110, Kuwait. E-mail:
| | - Abu S. Mustafa
- Department of Microbiology, OMICS Research Unit, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait,Department of Research Core Facility, OMICS Research Unit, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Islam Khan
- Department of Biochemistry, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Ali H. Ziyab
- Department of Community Medicine and Behavioral Sciences, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Munira Altarrah
- Thunayan Al-Ghanim Gastroenterology Center, Al-Amiri Hospital, Kuwait
| | - Riyas Sulaiman
- Department of Research Core Facility, OMICS Research Unit, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Numeer Kadungothayil
- Department of Research Core Facility, OMICS Research Unit, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Faraz Shaheed
- Department of Research Core Facility, OMICS Research Unit, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
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Li M, Yue C, Jin G, Guo H, Ma H, Wang G, Huang S, Wu F, Zhao X. Rs1884444 variant in
IL23R
gene is associated with a decreased risk in esophageal cancer in Chinese population. Mol Carcinog 2019; 58:1822-1831. [PMID: 31197899 DOI: 10.1002/mc.23069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/15/2019] [Accepted: 05/26/2019] [Indexed: 12/24/2022]
Affiliation(s)
- Miao Li
- Department of Internal Medicine OncologyThe First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
- Department of Internal Medicine OncologyThe Fifth People's Hospital of Qinghai Province Xining Qinghai China
| | - Chenli Yue
- Department of Respiratory MedicineShaanxi Provincial Crops Hospital of Chinese People's Armed Police Force Xi'an Shaanxi China
| | - Guoquan Jin
- Department of General SurgeryThe Fifth People's Hospital of Qinghai Province Xining Qinghai China
| | - Hulin Guo
- Department of Internal Medicine OncologyThe Fifth People's Hospital of Qinghai Province Xining Qinghai China
| | - Haizhao Ma
- Medical DepartmentThe Fifth People's Hospital of Qinghai Province Xining Qinghai China
| | - Guanying Wang
- Department of Internal Medicine OncologyThe First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
| | - Shangke Huang
- Department of Internal Medicine OncologyThe First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
- Department of OncologyThe Affiliated Hospital of Southwest Medical University Luzhou Sichuan China
| | - Fang Wu
- Department of NeonatologyThe First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
| | - Xinhan Zhao
- Department of Internal Medicine OncologyThe First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shaanxi China
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Fischer S, Kövesdi E, Magyari L, Csöngei V, Hadzsiev K, Melegh B, Hegyi P, Sarlós P. IL23R single nucleotide polymorphisms could be either beneficial or harmful in ulcerative colitis. World J Gastroenterol 2017; 23:447-454. [PMID: 28210080 PMCID: PMC5291849 DOI: 10.3748/wjg.v23.i3.447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/29/2016] [Accepted: 12/08/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the association of seven single nucleotide polymorphisms (SNPs) of the IL23R gene with the clinical picture of ulcerative colitis (UC).
METHODS Genomic DNA samples of 131 patients (66 males, 65 females, mean age 55.4 ± 15.8 years) with Caucasian origin, diagnosed with UC were investigated. The diagnosis of UC was based on the established clinical, endoscopic, radiological, and histopathological guidelines. DNA was extracted from peripheral blood leukocytes by routine salting out method. Polymerase chain reaction and restriction fragment length polymorphism were used to identify the alleles of seven SNPs of IL23R gene (rs11209026, rs10889677, rs1004819, rs2201841, rs7517847, rs10489629, rs7530511).
RESULTS Four out of seven analyzed SNPs had statistically significant influence on the clinical picture of UC. Two SNPs were associated with greater colonic extension (rs2201841 P = 0.0084; rs10489629 P = 0.0405). For two of the SNPs, there was more frequently need for operations (rs2201841 P = 0.0348, OR = 8.0; rs10889677 P = 0.0347, OR = 8.0). The rs2201841 showed to be a risk factor for the development of iron deficiency (P = 0.0388, OR = 6.1837). For patients with the rs10889677, a therapy with azathioprine was more frequently necessary (P = 0.0116, OR = 6.1707). Patients with rs10489629 SNP had a lower risk for weight loss (P = 0.0169, OR = 0.3394). Carriers of the heterozygous variant had a higher risk for an extended disease (P = 0.0284). The rs7517847 showed a protective character leading to mild bowel movements. Three SNPs demonstrated no statistically significant influence on any examined clinical features of UC.
CONCLUSION We demonstrated susceptible or protective character of the investigated IL23R SNPs on the phenotype of UC, confirming the genetic association.
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Abdollahi E, Tavasolian F, Momtazi-Borojeni AA, Samadi M, Rafatpanah H. Protective role of R381Q (rs11209026) polymorphism in IL-23R gene in immune-mediated diseases: A comprehensive review. J Immunotoxicol 2016; 13:286-300. [PMID: 27043356 DOI: 10.3109/1547691x.2015.1115448] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Interleukin-23 (IL-23) is a regulator of cellular immune responses involved in controlling infection and autoimmune diseases. Strong evidence has shown that IL-23 plays a role in the maintenance of immune responses by influencing the proliferation and survival of IL-17-producing T-helper (TH)-17 cells. The critical role of the IL-23/TH17 axis in immune-mediated diseases has emerged from different studies. It has also been seen that polymorphisms in the IL-23 receptor (IL-23R) gene might influence IL-23 responses. Interestingly, a functional single nucleotide polymorphism (SNP) in the IL-23 receptor gene (IL-23R; rs11209026, 1142 G wild-type A reduced function, Arg381Gln, R381Q) seems to confer a measure of protection against development of inflammatory bowel disease (IBD; Crohn's disease, ulcerative colitis), ankylosing spondylitis, rheumatoid arthritis, psoriasis, thyroiditis, recurrent spontaneous abortion and asthma, suggesting that a perturbation in the IL-23 signaling pathway is likely to be relevant to the pathophysiology of these diseases. The aim of this review was to provide an evaluation of what is currently known about the protective role of R381Q variant in IL-23R gene in immune-based diseases.
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Affiliation(s)
- Elham Abdollahi
- a Department of Medical Immunology , School of Medicine, Mashhad University of Medical Sciences , Mashhad , Iran ;,b Shahid Sadoughi University of Medical Science , Yazd , Iran ;,c Student Research Committee, Mashhad University of Medical Sciences , Mashhad , Iran
| | - Fataneh Tavasolian
- d Department of Immunology , School of Medical Sciences, Tarbiat Modares University , Tehran , Iran
| | - Amir Abbas Momtazi-Borojeni
- c Student Research Committee, Mashhad University of Medical Sciences , Mashhad , Iran ;,e Department of Medical Biotechnology , Mashhad University of Medical Sciences , Mashhad , Iran
| | - Morteza Samadi
- f Department of Immunology , Shahid Sadoughi University , Yazd , Iran ;,g Reproductive Immunology Research Center, Shahid Sadoughi University , Yazd , Iran
| | - Houshang Rafatpanah
- h Research Center for HIV/AIDS, HTLV1 and Viral Hepatitis, Iranian Academic for Education, Culture and Research (ACECR), Mashhad Branch , Mashhad , Iran ;,i Inflammation/Inflammatory Diseases Research Center, Mashhad University of Medical Sciences , Mashhad , Iran
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Lee YH, Kim JH, Seo YH, Choi SJ, Ji JD, Song GG. CTLA-4 polymorphisms and susceptibility to inflammatory bowel disease: A meta-analysis. Hum Immunol 2014; 75:414-21. [DOI: 10.1016/j.humimm.2014.02.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/03/2014] [Accepted: 02/04/2014] [Indexed: 01/26/2023]
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Association of single nucleotide polymorphisms of IL23R and IL17 with ulcerative colitis risk in a Chinese Han population. PLoS One 2012; 7:e44380. [PMID: 22984500 PMCID: PMC3439435 DOI: 10.1371/journal.pone.0044380] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 08/06/2012] [Indexed: 12/15/2022] Open
Abstract
Background Previous studies implicated that IL23R and IL17 genes play an important role in autoimmune inflammation. Genome-wide association studies have also identified multiple single nucleotide polymorphisms (SNPs) in the IL23R gene region associated with inflammatory bowel diseases. This study examined the association of IL23R and IL17A gene SNPs with ulcerative colitis susceptibility in a population in China. Methodology A total of 270 ulcerative colitis and 268 healthy controls were recruited for the analyses of 23 SNPs in the IL23R and IL17A regions. Genomic DNA was extracted and analysis of these 23 SNPs using ligase detection reaction allelic (LDR) technology. Genotype and allele associations were calculated using SPSS 13.0 software package. Principal Findings Compared to the healthy controls, the variant alleles IL23R rs7530511, and rs11805303 showed a statistically significant difference for ulcerative colitis susceptibility (0.7% vs 3.3%, P = 0.002; 60.4% vs 53.2%, P = 0.0017, respectively). The linkage disequilibrium (LD) patterns of these SNPs were measured and three LD blocks from the SNPs of IL23R and one block from those of IL17A were identified. A novel association with ulcerative colitis susceptibility occurred in haplotypes of IL23R (Block1 H3 P = 0.02; Block2 H2 P = 0.019; Block3 H4 P = 0.029) and IL17A (H4 P = 0.034). Pair-wise analyses showed an interaction between the risk haplotypes in IL23R and IL17A (P = 0.014). Conclusions Our study demonstrated that rs7530511, and rs11805303 of IL23R were significantly associated with ulcerative colitis susceptibility in the Chinese population. The most noticeable finding was the linkage of IL23R and IL17A gene region to ulcerative colitis risk due to the gene-gene interaction.
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Repnik K, Potočnik U. Haplotype in the IBD5 region is associated with refractory Crohn's disease in Slovenian patients and modulates expression of the SLC22A5 gene. J Gastroenterol 2011; 46:1081-91. [PMID: 21695374 DOI: 10.1007/s00535-011-0426-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 05/27/2011] [Indexed: 02/06/2023]
Abstract
BACKGROUND The IBD5 locus (OMIM ID 606348) on chromosome 5 was suggested to be one of the most important genetic factors involved in the pathogenesis of inflammatory bowel diseases (IBDs). However the main contributor from this region is still unknown. METHODS We investigated the possible association of the IBD5 locus with IBD in Slovenian patients and correlation between disease-associated single nucleotide polymorphisms (SNPs) and quantitative gene expression (eQTL) of candidate genes from the IBD5 locus in peripheral blood lymphocytes and colon tissue biopsies from IBD patients. We genotyped SNPs from the IBD5 locus in 312 healthy controls and 632 IBD patients. RESULTS We found statistically significant association of polymorphisms rs1050152 in gene SLC22A4 (p = 0.005, OR = 2.177, 95% CI = 1.270-3.526) and rs2631372 in gene SLC22A5 (p = 0.001, OR = 0.473, 95% CI = 0.307-0.731) and TC haplotype of both polymorphisms (p = 0.006, OR = 1,541, 95% CI = 1.130-2.100) with refractory Crohn's disease (CD) in Slovenian patients who do not respond to standard therapy, including patients who develop fistulas. We found decreased expression of SLC22A4 and SLC22A5 genes in peripheral blood lymphocytes from IBD patients compared to control group and decreased expression of SLC22A5 gene in inflamed tissue biopsies compared to noninflamed colon (p = 0.009). We found lower expression of SLC22A5 gene in IBD patients with disease-susceptible genotypes for both disease-associated SNPs. CONCLUSIONS Our data suggest that SNPs and haplotype in the IBD5 SLC22A4/SLC22A5 region contribute to the development of particularly refractory Crohn's disease in the Slovenian population, and expression studies in blood lymphocytes and colon tissue biopsies and eQTL analysis suggest that SLC22A5 is the main gene in the IBD5 region contributing to the IBD pathogenesis.
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Affiliation(s)
- Katja Repnik
- Center for Human Molecular Genetics and Pharmacogenomics, Faculty of Medicine, University of Maribor, Slomškov Trg 15, 2000 Maribor, Slovenia
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Wang J, Wang X, Yang H, Wu D, Wang L, Qian J. Contribution of the IBD5 locus to inflammatory bowel disease: a meta-analysis. Hum Genet 2011; 129:597-609. [PMID: 21279723 DOI: 10.1007/s00439-011-0952-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 01/17/2011] [Indexed: 12/13/2022]
Abstract
To evaluate the association of the IBD5 locus to the predisposition of inflammatory bowel diseases (IBDs), a series of meta-analyses between five IBD5 variants (OCTN1 C1672T, OCTN2 G-207C, OCTN1/2 TC haplotype, IGR2096a_1, IGR2198a_1 and IGR2230a_1) and Crohn's disease (CD) and ulcerative colitis (UC) were performed, which included a total of 26 studies. Overall, five IBD5 variants in a per-allele model of inheritance were significantly associated with elevated CD risk (for OCTN1: OR = 1.23, 95% CI = 1.16-1.30, P < 0.001; for OCTN2: OR = 1.20, 95% CI = 1.11-1.30, P < 0.001; for IGR2096a_1: OR = 1.36, 95% CI = 1.24-1.46, P < 0.001; for IGR2198a_1: OR = 1.34, 95% CI = 1.24-1.46, P < 0.001; for IGR2230a_1: OR = 1.35, 95% CI = 1.23-1.48, P < 0.001) and OCTN1/2 TC haplotype (OR = 1.32, 95% CI = 1.22-1.43, P < 0.001). In the subgroup analysis, the statistically significant associations were also observed in adult- and pediatric-onset CD and in Caucasians for five IBD5 variants and the OCTN1/2 TC haplotype. A statistically significant increase in the risk of UC was detected in a recessive model of inheritances for OCTN1 (OR = 1.23, 95% CI = 1.08-1.40, P < 0.001), OCTN2 (OR = 1.18, 95% CI = 1.05-1.33, P = 0.006), IGR2096a_1 (OR = 1.37, 95% CI = 1.15-1.62, P < 0.001) and IGR2198a_1 (OR = 1.35, 95% CI = 1.10-1.66, P = 0.004); the increased risks of UC were maintained in the adult and Caucasian subgroups, but not the pediatric subgroup. In summary, our results suggested that the IBD5 locus contributes to the susceptibility of CD in a per-allele manner in adults, children and Caucasians, and the locus contributes to the susceptibility of UC in a recessive manner in adult and Caucasian populations.
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Affiliation(s)
- Jian Wang
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, People's Republic of China
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