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Single Nucleotide Polymorphisms of Toll-like Receptor 4 in Hepatocellular Carcinoma-A Single-Center Study. Int J Mol Sci 2022; 23:ijms23169430. [PMID: 36012696 PMCID: PMC9409058 DOI: 10.3390/ijms23169430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 12/12/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver tumor leading to significant morbidity and mortality; its exact genetic background is largely unrecognized. Toll-like receptor-4 (TLR4) reacts with lipopolysaccharides, molecules found in the outer membrane of Gram-negative bacteria. In damaged liver, TLR4 expression is upregulated, leading to hepatic inflammation and injury. We tried to investigate the role of the two most common single-nucleotide polymorphisms (SNPs) of TLR4 in HCC-genesis. Aged > 18 years old, cirrhotic patients were included in this study. Exclusion criteria were non-HCC tumors and HIV co-infection. TLR4 SNPs association with HCC occurrence was the primary endpoint, and associations with all-cause and liver-related mortality, as well as time durations between diagnosis of cirrhosis and HCC development or death and diagnosis of HCC and death were secondary endpoints. A total of 52 out of 260 included patients had or developed HCC. TLR4 SNPs showed no correlation with primary or secondary endpoints, except for the shorter duration between HCC development and death in patients with TLR4 mutations. Overall, TLR4 SNPs showed no correlation with carcinogenesis or deaths in patients with liver cirrhosis; patients with TLR4 SNPs that developed HCC had lower survival rates, a finding that should be further evaluated.
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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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Guo S, Li W, Chen F, Yang S, Huang Y, Tian Y, Xu D, Cao N. Polysaccharide of Atractylodes macrocephala Koidz regulates LPS-mediated mouse hepatitis through the TLR4-MyD88-NFκB signaling pathway. Int Immunopharmacol 2021; 98:107692. [PMID: 34116287 DOI: 10.1016/j.intimp.2021.107692] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 04/13/2021] [Accepted: 04/18/2021] [Indexed: 12/14/2022]
Abstract
Feed corruption and poor breeding environment could cause widespread bacterial infection which could cause severe liver inflammation and lead to liver damage, even death. It has been proved that Polysaccharide of Atractylodes macrocephala Koidz (PAMK) could improve the immunity of animal, but the mechanism of its protective effect on hepatitis has been rarely reported. This study investigated the protective effect of PAMK on mouse liver through LPS-induced liver inflammatory. The results showed that LPS caused swelling of hepatocytes, disappearance of hepatic cord structure and infiltration of a large number of inflammatory cells, and LPS could up-regulated mRNA and protein expression levels of TLR4, MyD88, IKBα and NFκB, increased cytokines IL-1β, IL-4, IL-6 and TNF-α levels, enhance the levels of antioxidant enzymes CAT, GSH-PX, SOD, iNOs and MDA. PAMK pretreatment could relieved histopathological damage caused by LPS, and could activate the TLR4-MyD88-NFκB signalling pathway, reduce the levels of IL-1β, IL-6 and TNF-α, increase IL-4 levels, inhibit the levels of GSH-PX and MDA. These results indicate that PAMK could reduce inflammatory damage and oxidative stress in mice and play a protective role in the early stages of LPS invasion of the liver.
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Affiliation(s)
- Sixuan Guo
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Wanyan Li
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Feiyue Chen
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Shuzhan Yang
- Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China; Guangzhou Customs Technology Center, Guangzhou, Guangdong 510623, China.
| | - Yunmao Huang
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Yunbo Tian
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Danning Xu
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
| | - Nan Cao
- Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China; Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, Guangdong 510225, China.
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Tang L, Xu M. Candidate polymorphisms and susceptibility to inflammatory bowel disease: A systematic review and meta-analysis. Gene X 2020; 753:144814. [DOI: 10.1016/j.gene.2020.144814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/23/2020] [Indexed: 12/20/2022] Open
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Aguirre JE, Beswick EJ, Grim C, Uribe G, Tafoya M, Chacon Palma G, Samedi V, McKee R, Villeger R, Fofanov Y, Cong Y, Yochum G, Koltun W, Powell D, Pinchuk IV. Matrix metalloproteinases cleave membrane-bound PD-L1 on CD90+ (myo-)fibroblasts in Crohn's disease and regulate Th1/Th17 cell responses. Int Immunol 2020; 32:57-68. [PMID: 31633754 DOI: 10.1093/intimm/dxz060] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 09/30/2019] [Indexed: 01/01/2023] Open
Abstract
Increased T helper (Th)1/Th17 immune responses are a hallmark of Crohn's disease (CD) immunopathogenesis. CD90+ (myo-)fibroblasts (MFs) are abundant cells in the normal (N) intestinal mucosa contributing to mucosal tolerance via suppression of Th1 cell activity through cell surface membrane-bound PD-L1 (mPD-L1). CD-MFs have a decreased level of mPD-L1. Consequently, mPD-L1-mediated suppression of Th1 cells by CD-MFs is decreased, yet the mechanism responsible for the reduction in mPDL-1 is unknown. Increased expression of matrix metalloproteinases (MMPs) has been reported in CD. Herein we observed that when compared to N- and ulcerative colitis (UC)-MFs, CD-MFs increase in LPS-inducible levels of MMP-7 and -9 with a significant increase in both basal and inducible MMP-10. A similar pattern of MMP expression was observed in the CD-inflamed mucosa. Treatment of N-MFs with a combination of recombinant human MMP-7, -9 and -10 significantly decreased mPD-L1. In contrast, inhibition of MMP activity with MMP inhibitors or anti-MMP-10 neutralizing antibodies restores mPD-L1 on CD-MFs. CD-MFs demonstrated reduced capacity to suppress Th1 and Th17 responses from activated CD4+ T cells. By contrast, supplementation of the CD-MF:T-cell co-cultures with MMP inhibitors or anti-MMP neutralizing antibodies restored the CD-MF-mediated suppression. Our data suggest that (i) increased MMP-10 expression by CD-MFs and concomitant cleavage of PD-L1 from the surface of CD-MFs are likely to be one of the factors contributing to the decrease of mPD-L1-mediated suppression of Th1/Th17 cells in CD; and (ii) MMPs are likely to have a significant role in the intestinal mucosal immune responses.
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Affiliation(s)
- Jose E Aguirre
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.,Institute of Translational Science, University of Texas Medical Branch, Galveston, TX, USA
| | - Ellen J Beswick
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Carl Grim
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Gabriela Uribe
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.,Department of Medicine at PennState Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Marissa Tafoya
- Department of Pathology, University of New Mexico, Albuquerque, NM, USA
| | | | - Von Samedi
- School of Medicine, University of New Mexico, Albuquerque, NM, USA
| | - Rohini McKee
- Department of Surgery at the University of New Mexico, Albuquerque, NM, USA
| | - Romain Villeger
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Yuriy Fofanov
- Department of Pharmacology & Toxicology, University of Texas Medical Branch, Galveston, TX, USA
| | - Yingzi Cong
- Microbiology and Immunology at the University of Texas Medical Branch, Galveston, TX, USA
| | - Gregory Yochum
- Department of Biochemistry and Molecular Biology, PennState Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Walter Koltun
- Department of Colorectal Surgery at PennState Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Don Powell
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.,Institute of Translational Science, University of Texas Medical Branch, Galveston, TX, USA
| | - Irina V Pinchuk
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.,Institute of Translational Science, University of Texas Medical Branch, Galveston, TX, USA.,Department of Medicine at PennState Health Milton S. Hershey Medical Center, Hershey, PA, USA.,Microbiology and Immunology at the University of Texas Medical Branch, Galveston, TX, USA
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Novel Clinical Campylobacter jejuni Infection Models Based on Sensitization of Mice to Lipooligosaccharide, a Major Bacterial Factor Triggering Innate Immune Responses in Human Campylobacteriosis. Microorganisms 2020; 8:microorganisms8040482. [PMID: 32231139 PMCID: PMC7232424 DOI: 10.3390/microorganisms8040482] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 12/12/2022] Open
Abstract
Human Campylobacter jejuni infections inducing campylobacteriosis including post-infectious sequelae such as Guillain-Barré syndrome and reactive arthritis are rising worldwide and progress into a global burden of high socioeconomic impact. Intestinal immunopathology underlying campylobacteriosis is a classical response of the innate immune system characterized by the accumulation of neutrophils and macrophages which cause tissue destruction, barrier defects and malabsorption leading to bloody diarrhea. Clinical studies revealed that enteritis and post-infectious morbidities of human C. jejuni infections are strongly dependent on the structure of pathogenic lipooligosaccharides (LOS) triggering the innate immune system via Toll-like-receptor (TLR)-4 signaling. Compared to humans, mice display an approximately 10,000 times weaker TLR-4 response and a pronounced colonization resistance (CR) against C. jejuni maintained by the murine gut microbiota. In consequence, investigations of campylobacteriosis have been hampered by the lack of experimental animal models. We here summarize recent progress made in the development of murine C. jejuni infection models that are based on the abolishment of CR by modulating the murine gut microbiota and by sensitization of mice to LOS. These advances support the major role of LOS driven innate immunity in pathogenesis of campylobacteriosis including post-infectious autoimmune diseases and promote the preclinical evaluation of novel pharmaceutical strategies for prophylaxis and treatment.
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Abstract
BACKGROUND A large amount of research has been devoted to the detection and investigation of epistatic interactions in genome-wide association studies (GWASs). Most of the literature focuses on low-order interactions between single-nucleotide polymorphisms (SNPs) with significant main effects. RESULTS In this paper we propose an original approach for detecting epistasis at the gene level, without systematically filtering on significant genes. We first compute interaction variables for each gene pair by finding its Eigen-Epistasis component, defined as the linear combination of Gene SNPs having the highest correlation with the phenotype. The selection of significant effects is done using a penalized regression method based on Group Lasso controlling the False Discovery Rate. CONCLUSION The method is tested against two recent alternative proposals from the literature using synthetic data, and shows good performances in different settings. We demonstrate the power of our approach by detecting new gene-gene interactions on three genome-wide association studies.
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