1
|
Zhang K, Ma X, Zhang R, Liu Z, Jiang L, Qin Y, Zhang D, Tian P, Gao Z, Zhang N, Shi Z, Xu S. Crosstalk Between Gut Microflora and Vitamin D Receptor SNPs Are Associated with the Risk of Amnestic Mild Cognitive Impairment in a Chinese Elderly Population. J Alzheimers Dis 2022; 88:357-373. [PMID: 35599486 DOI: 10.3233/jad-220101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: The interactions between environmental factors and genetic variants have been implicated in the pathogenesis of Alzheimer’s disease (AD). The altered gut microbiota (GM) and vitamin D deficiency are closely associated with the higher risk of AD. Objective: This study was performed to evaluate whether the crosstalk between GM and single nucleotide polymorphisms (SNPs) of vitamin D receptor (VDR) or vitamin D binding protein (VDBP) have a link with the risk of amnestic mild cognitive impairment (aMCI) in the Chinese elderly population. Methods: A total of 171 aMCI patients and 261 cognitive normal controls (NC) were enrolled in this study. Six tag SNPs of VDR and VDBP were genotyped by PCR-RFLP. The serum levels of vitamin D, Aβ1-42, and p-tau (181P) were determined by using of ELISA kits. The alterations in the GM were analyzed by full-length 16S ribosomal RNA (rRNA) gene sequencing. Results: The frequencies of AG genotype and A allele of VDR rs1544410 in aMCI group were significantly higher than that in NC group (genotype: p = 0.002, allele: p = 0.003). Patients with aMCI showed an abnormal GM composition compared with NC group. Interestingly, significant differences in GM composition were found between aMCI and NC group among individuals with AG genotype, as well as between individuals with AG and GG genotype of VDR rs1544410 among patients with aMCI. Conclusion: These results implicated that the crosstalk between gut microflora and vitamin D receptor variants are associated with the risk of aMCI in Chinese elderly population.
Collapse
Affiliation(s)
- Kaixia Zhang
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
| | - Xiaoying Ma
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
| | - Rui Zhang
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
| | - Zanchao Liu
- Department ofEndocrinology, The Second Hospital of Shijiazhuang City, Shijiazhuang, P. R. China
| | - Lei Jiang
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
| | - Yushi Qin
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
| | - Di Zhang
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
| | - Pei Tian
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
| | - ZhaoYu Gao
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
| | - Nan Zhang
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
| | - Zhongli Shi
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
| | - Shunjiang Xu
- Central Laboratory, The First Hospital of HebeiMedical University, Shijiazhuang, P. R. China
- Hebei International Joint Research Center forBrain Science, Shijiazhuang, P. R. China
- HebeiKey Laboratory of Brain Science and Psychiatric-Psychologic Disease, Shijiazhuang, P. R. China
- Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, ChineseAcademy of Medical Sciences, Beijing, P. R. China
| |
Collapse
|
2
|
Zhang Y, Garrett S, Carroll RE, Xia Y, Sun J. Vitamin D receptor upregulates tight junction protein claudin-5 against colitis-associated tumorigenesis. Mucosal Immunol 2022; 15:683-697. [PMID: 35338345 PMCID: PMC9262815 DOI: 10.1038/s41385-022-00502-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 01/28/2022] [Accepted: 02/21/2022] [Indexed: 02/06/2023]
Abstract
Tight junctions are essential for barrier integrity, inflammation, and cancer. Vitamin D and the vitamin D receptor (VDR) play important roles in colorectal cancer (CRC). Using the human CRC database, we found colonic VDR expression was low and significantly correlated with a reduction of Claudin-5 mRNA and protein. In the colon of VDRΔIEC mice, deletion of intestinal VDR led to lower protein and mRNA levels of Claudin-5. Intestinal permeability was increased in the VDR-/- colon cancer model. Lacking VDR and a reduction of Claudin-5 are associated with an increased number of tumors in the VDR-/- and VDRΔIEC mice. Furthermore, gain and loss functional studies have identified CLDN-5 as a downstream target of VDR. We identified the Vitamin D response element (VDRE) binding sites in a reporter system showed that VDRE in the Claudin-5 promoter is required for vitamin D3-induced Claudin-5 expression. Conditional epithelial VDR overexpression protected against the loss of Claudin-5 in response to inflammation and tumorigenesis in vivo. We also reported fecal VDR reduction in a colon cancer model. This study advances the understanding of how VDR regulates intestinal barrier functions in tumorigenesis and the possibility for identifying new biomarker and therapeutic targets to restore VDR-dependent functions in CRC.
Collapse
Affiliation(s)
- Yongguo Zhang
- Department of Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Shari Garrett
- Department of Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA,Department of Microbiology/Immunology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Robert E. Carroll
- Department of Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Yinglin Xia
- Department of Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jun Sun
- Department of Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA,UIC Cancer Center, University of Illinois at Chicago, Chicago, IL, USA,Department of Microbiology/Immunology, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA,Jesse Brown VA Medical Center Chicago, IL (537), USA
| |
Collapse
|
3
|
Abstract
ABSTRACT Accumulating evidence suggests that intestinal bacteria play an important role in the pathogenesis of colorectal cancer (CRC). Due to the complexity of the intestinal microbiome, identification of the specific causative microbial agents in CRC remains challenging, and the search for the causative microbial agents is intense. However, whether bacteria or their products can induce inflammation that results in tumorigenesis or directly causes CRC in humans is still not clear. This review will mainly focus on the progress of bacterial infection and CRC, and introduce the microbial contribution to the hallmarks of cancer. This article uses Salmonella and its chronic infection as an example to investigate a single pathogen and its role in the development of CRC, based on laboratory and epidemiological evidence. The bacterial infection leads to an altered intestinal microbiome. The review also discusses the dysfunction of the microbiome and the mechanism of host-microbial interactions, for example, bacterial virulence factors, key signaling pathways in the host, and microbial post-translational modifications in the tumorigenesis. Colonic carcinogenesis involves a progressive accumulation of mutations in a genetically susceptible host leading to cellular autonomy. Moving forward, more human data are needed to confirm the direct roles of bacterial infection in CRC development. Insights into the inhibiting infection will help to prevent cancer and develop strategies to restore the balance between host and microorganisms.
Collapse
|