Jun Zhang1, Dan Luo2, Zhiming Lin3, Wenying Zhou4, Jialing Rao1, Yuanqing Li1, Jianhao Wu1, Hui Peng5, Tanqi Lou1. 1. Department of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China. 2. Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China. 3. Department of Rheumatology and Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China. 4. Department of Laboratory Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China. 5. Department of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China. Electronic address: pengh@mail.sysu.edu.cn.
Abstract
BACKGROUND: Gut bacterial microbiota is altered in patients with chronic kidney disease (CKD) and those on dialysis. However, it is not yet clear what bacterial composition changes occur in patients with idiopathic nephrotic syndrome (INS). We present in this report the changes in gut bacterial microbiota in INS patients with membranous nephropathy. METHODS: A total of 158 individuals were recruited for this study. Of these, 80 patients had stage 3-5 CKD without nephrotic syndrome (CKD group), 48 patients had INS and pathological diagnosis of membranous nephropathy (INS group), and 30 were age- and sex-matched healthy controls (HC group). The gut microbiome composition was analyzed using a 16S ribosomal RNA gene-based sequencing protocol. RESULTS: The results indicate that the nephrotic syndrome patients had a significantly different alpha and beta diversity compared with the CKD group and HC group (P < 0.01). At the phylum level, the INS patients showed increased Fusobacteria and Proteobacteria but reduced Firmicutes when compared with the HC group. At the genus level, Megamonas, Megasphaera, Akkermansia, and the butyrate-producing bacteria Lachnospira, Roseburia, and Fusobacterium were more abundant in the HC group (LDA score > 3) than the CKD and INS group. Fecal organic acid analysis revealed significantly lower quantities of propionate acid and butyric acid in INS than the HC group (P < 0.05). Compared with the HC group, we found that Parabacteroides was increased in CKD and INS patients. In addition, Oscillospira and Ruminococcus were more abundant in CKD patients than in the other two groups (LDA score > 3). At the genus level, ten bacterial taxa were more prevalent in the HC group. Providencia and Myroides were more prevalent in INS patients. CONCLUSION: Our findings highlight that, INS patients had a significantly different alpha and beta diversity and decreased gut microbiota-derived short-chain fatty acids, such as butyrate. However, large-scale prospective studies should be performed to identify the cause and effect factors of these changes in the microbiota in INS patients.
BACKGROUND: Gut bacterial microbiota is altered in patients with chronic kidney disease (CKD) and those on dialysis. However, it is not yet clear what bacterial composition changes occur in patients with idiopathic nephrotic syndrome (INS). We present in this report the changes in gut bacterial microbiota in INS patients with membranous nephropathy. METHODS: A total of 158 individuals were recruited for this study. Of these, 80 patients had stage 3-5 CKD without nephrotic syndrome (CKD group), 48 patients had INS and pathological diagnosis of membranous nephropathy (INS group), and 30 were age- and sex-matched healthy controls (HC group). The gut microbiome composition was analyzed using a 16S ribosomal RNA gene-based sequencing protocol. RESULTS: The results indicate that the nephrotic syndromepatients had a significantly different alpha and beta diversity compared with the CKD group and HC group (P < 0.01). At the phylum level, the INS patients showed increased Fusobacteria and Proteobacteria but reduced Firmicutes when compared with the HC group. At the genus level, Megamonas, Megasphaera, Akkermansia, and the butyrate-producing bacteria Lachnospira, Roseburia, and Fusobacterium were more abundant in the HC group (LDA score > 3) than the CKD and INS group. Fecal organic acid analysis revealed significantly lower quantities of propionate acid and butyric acid in INS than the HC group (P < 0.05). Compared with the HC group, we found that Parabacteroides was increased in CKD and INS patients. In addition, Oscillospira and Ruminococcus were more abundant in CKD patients than in the other two groups (LDA score > 3). At the genus level, ten bacterial taxa were more prevalent in the HC group. Providencia and Myroides were more prevalent in INS patients. CONCLUSION: Our findings highlight that, INS patients had a significantly different alpha and beta diversity and decreased gut microbiota-derived short-chain fatty acids, such as butyrate. However, large-scale prospective studies should be performed to identify the cause and effect factors of these changes in the microbiota in INS patients.
Authors: Mengmeng Guo; Xi Cao; Ke Zhang; Menghao Pan; Yujiang Wu; Suo Langda; Yuxin Yang; Yulin Chen; Ba Gui; Baohua Ma Journal: Vet Sci Date: 2022-04-01