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Human Endometrial Microbiota at Term of Normal Pregnancies

Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari “A. Moro”, Via Orabona 4, 70126 Bari, Italy
2nd Unit of Obstetrics and Gynecology, Department of Biomedical Science and Human Oncology, University of Bari “A. Moro”, Piazza G. Cesare, 70124 Bari, Italy
Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, CNR, Via Amendola 122/O, 70126 Bari, Italy
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Genes 2019, 10(12), 971;
Received: 8 October 2019 / Revised: 12 November 2019 / Accepted: 19 November 2019 / Published: 26 November 2019
(This article belongs to the Special Issue Human Microbiome or Microbial Communities Related with Humans)
The endometrium is a challenging site for metagenomic analysis due to difficulties in obtaining uncontaminated samples and the limited abundance of the bacterial population. Indeed, solid correlations between endometrial physio-pathologic conditions and bacteria compositions have not yet been firmly established. Nevertheless, the study of the endometrial microbiota is of great interest due to the close correlations between microbiota profiles, women’s health, and successful pregnancies. In this study, we decided to tackle the study of the endometrial microbiota through analysis of bacterial population in women subjected to elective caesarean delivery. As a pilot study, a cohort of 19 Caucasian women at full term of normal pregnancy and with a prospection of elective caesarean delivery was enrolled for endometrium sampling at the time of caesarean section. Sampling was carried out by endometrial biopsy soon after the delivery of the newborn and the discharge of the placenta and fetal membranes from the uterus. Bacterial composition was established by a deep metabarcoding next generation sequencing (NGS) procedure addressing the V5–V6 hypervariable region of the 16S rRNA gene. Amplicon sequences were analysed by bioinformatic procedures for denoising and taxonomic classification. The RDP database was used as 16S rRNA reference collection. Metabarcoding analysis showed the presence of a common bacterial composition, including six genera classifiable within the human microbiota (Cutibacterium, Escherichia, Staphylococcus, Acinetobacter, Streptococcus, Corynebacterium), that could be part of the core endometrial microbiota under the specific conditions examined. These results can provide useful information for future studies on the correlations between bacteria and successful pregnancies. View Full-Text
Keywords: endometrium; microbiota; metabarcoding; metagenomics endometrium; microbiota; metabarcoding; metagenomics
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MDPI and ACS Style

Leoni, C.; Ceci, O.; Manzari, C.; Fosso, B.; Volpicella, M.; Ferrari, A.; Fiorella, P.; Pesole, G.; Cicinelli, E.; Ceci, L.R. Human Endometrial Microbiota at Term of Normal Pregnancies. Genes 2019, 10, 971.

AMA Style

Leoni C, Ceci O, Manzari C, Fosso B, Volpicella M, Ferrari A, Fiorella P, Pesole G, Cicinelli E, Ceci LR. Human Endometrial Microbiota at Term of Normal Pregnancies. Genes. 2019; 10(12):971.

Chicago/Turabian Style

Leoni, Claudia, Oronzo Ceci, Caterina Manzari, Bruno Fosso, Mariateresa Volpicella, Alessandra Ferrari, Paola Fiorella, Graziano Pesole, Ettore Cicinelli, and Luigi R. Ceci 2019. "Human Endometrial Microbiota at Term of Normal Pregnancies" Genes 10, no. 12: 971.

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