Exploring the diversity of vaginal microbiota between healthy women and cervical cancer patients in India

Author:

Kamble Ashwini12,Naik Shilpa3,Talathi Manju4,Jadhav Deepali3,Sakharkar Meena5,Yang Jian5,Prakash Om6,Kaul-Ghanekar Ruchika172ORCID

Affiliation:

1. Cancer Research Lab, Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth (Deemed to be) University, Katraj-Dhankawadi, Pune-Satara Road, Pune-411043, Maharashtra, India

2. Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University), Pune, India

3. Department of Obstetrics and Gynaecology, B. J. Govt Medical College and Sassoon General Hospitals, Pune-411001, Maharashtra, India

4. Department of Obstetrics and Gynaecology, Bharati Vidyapeeth (Deemed to be) University Medical College & Hospital, Pune-411043, Maharashtra, India

5. College of Pharmacy and Nutrition, College of Medicine, University of Saskatchewan, Saskatchewan, Canada

6. Symbiosis Centre for Climate Change and Sustainability (SCCCS), Symbiosis International (Deemed University), Lavale, Pune-412115, Maharashtra, India

7. Symbiosis Centre for Research and Innovation (SCRI), Symbiosis International (Deemed University), Lavale, Pune-412115, Maharashtra, India

Abstract

Introduction. Cervicovaginal diversity has been reported as a predictive biomarker for cervical cancer risk. We recently reported the bio-therapeutic potential of vaginal probiotics from healthy Indian women against vaginal pathogens, isolated from the invasive cervical cancer (ICC) patients. Gap Statement. The cervicovaginal microflora from cervical cancer patients has not yet been reported from Indian population. Aim. The present study aimed at comparing the cervicovaginal microbiome between healthy controls (HC) and ICC patients from the Indian population. Methodology. In total, 30 vaginal swabs (15 from HC and 15 from ICC) were subjected to 16S rRNA gene sequencing. Alpha diversity was evaluated by Shannon and Chao1 index; and beta diversity by principle coordinate analysis (PCoA) of weighted and unweighted UniFrac distances. The relative abundance of the microbial taxa was done according to linear discriminant analysis effect size (LEfSe). Results. Predominance of Staphylococcus spp. in ICC and Lactobacillus gasseri in HC groups was observed. Alpha-diversity was found to be higher in ICC as compared to HC but was statistically non-significant. LEfSe analysis revealed Bacteroides fragilis and Escherichia coli as the marker genera in ICC with a marked decrease in Lactobacillus sp. Contrarily, in HC, L. gasseri, L. iners and L. fermentum were found to be abundant. Conclusion. Differences in the vaginal microbiome between healthy and ICC women could help in the early prediction of cervical cancer risk and thus in designing prevention strategies.

Funder

Department of Science Technology, Govt. of India

Publisher

Microbiology Society

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