Corrigendum: Combined intestinal metabolomics and microbiota analysis for acute endometritis induced by lipopolysaccharide in mice

[This corrects the article DOI: 10.3389/fcimb.2021.791373.].

Endometritis - Diagnosis,Treatment and its impact on fertility - A Scoping Review

Endometritis is defined as an infection or inflammation of the endometrium. Endometritis is of two types: acute and chronic. Acute endometritis is the symptomatic acute inflammation of the endometrium, which upon examination with a microscope shows micro-abscess and neutrophil invasion in the superficial endometrium. One of its most common manifestations is postpartum endometritis. Chronic endometritis is a silent disease usually diagnosed on the workup of secondary amenorrhoea and infertility. An important cause of chronic endometritis is tuberculosis, especially in developing nations. Chronic and acute endometritis have been associated with poor reproductive outcomes. Worse outcomes have been reported for individuals with chronic endometritis. This is a scoping review of endometritis and its impact on fertility.

A Novel Approach to Minimising Acute Equine Endometritis That May Help to Prevent the Development of the Chronic State

One of the most commonly encountered challenges in equine breeding is endometritis, which can be difficult to resolve and causes considerable economic losses to the industry. It is a multifactorial condition, developing as an exaggerated form of the normal physiological response to breeding. Seminal plasma proteins, spermatozoa, bacteria and debris initiate an inflammatory response; the resulting fluid and neutrophils are then cleared from the uterus along with the debris. However, in some mares, the response is prolonged or exaggerated, with much fluid formation and neutrophil infiltration leading to acute endometritis. A bacterial cause has been implicated, although in some cases no pathogenic organisms can be isolated on culture. It has been postulated that any one of a variety of bacteria could be involved, or dysbiosis of the uterine microbiome could be responsible. Repeated episodes of acute endometritis may lead to the pathology associated with chronic endometritis, with mucociliary dysfunction, vascular degeneration and plasma cell infiltration. This review examines the information that is currently available about equine endometritis, particularly about the role of the inseminate in the uterus, and its current treatment. There are some promising lines of research into treatment or prevention that may help to resolve the issue.

Combined Intestinal Metabolomics and Microbiota Analysis for Acute Endometritis Induced by Lipopolysaccharide in Mice

Endometritis is generally caused by bacterial infections, including both acute and chronic infections. In the past few decades, accumulated evidence showed that the occurrence of diseases might be related to gut microbiota. The progression of diseases is previously known to change the composition and diversity of intestinal microbiota. Additionally, it also causes corresponding changes in metabolites, primarily by affecting the physiological processes of microbiota. However, the effects of acute endometritis on intestinal microbiota and its metabolism remain unknown. Thus, the present study aimed to assess the effects of acute endometritis on intestinal microbes and their metabolites. Briefly, endometritis was induced in 30 specific pathogen-free (SPF) BALB/c female mice via intrauterine administration of lipopolysaccharide (LPS) after anesthesia. Following this, 16S rRNA gene sequencing and liquid chromatogram-mass spectrometry (LC-MS) were performed. At the genus level, the relative abundance of Klebsiella, Lachnoclostridium_5, and Citrobacter was found to be greater in the LPS group than in the control group. Importantly, the control group exhibited a higher ratio of Christensenellaceae_R−7_group and Parasutterella. Furthermore, intestinal metabolomics analysis in mice showed that acute endometritis altered the concentration of intestinal metabolites and affected biological oxidation, energy metabolism, and biosynthesis of primary bile acids. The correlation analysis between microbial diversity and metabolome provided a basis for a comprehensive understanding of the composition and function of the microbial community. Altogether, the findings of this study would be helpful in the prevention and treatment of acute endometritis in the future.

[The social hygienic risk factors to be applied in acute endometritis prognostication]

The article presents the results of investigation of prevalence and prognostic significance of socio-hygienic risk factors of acute endometritis in 187 patients with this disease and 150 patients with non-complicated postnatal period. It is established that development of acute endometritis is associated more with quality of life indices, early (up to 14 years of age) onset of sexual activity, presence in anamnesis of medical and spontaneous abortion. These risk factors should be considered in the process of prognosticating development of acute endometritis.

[Diagnosis of acute endometritis on hematologic indicators, and given discriminant models.]

Diagnosis of acute endometritis, despite advances in modern medicine due to the prevalence of erased forms remains difficult. The purpose of the study is to improve the diagnosis of acute endometritis by informative indicators of peripheral blood and discriminant models. In 154 patients with acute postpartum endometritis and 103 patients with uncomplicated post-Natal period studied, the indicators of General blood analysis with the assessment of informativeness, with the construction of the correlation and discriminant models. On the basis of mathematical models has high diagnostic significance of band neutrophils, erythrocyte sedimentation rate. These blood parameters have the largest number of reliable correlations with the other formed elements. The development of acute endometritis is accompanied by an increase in the number of representative correlations between blood parameters. The discriminant model accurately diagnose acute endometritis in to 86.7-87.4%, other cases are informative indicators of the General analysis of blood.

[The development of diagnostic of acute endometritis on the basis of modeling and cluster analysis of parameters of local immunity.]

The acute endometritis provoking expressed disorders of local immunity is considered as one of the prevalent complications of postnatal period and abortions. The purpose of study is to develop diagnostic of acute endometritis on the basis of applied correlation modeling and cluster analysis techniques diagnostically priority-driven immunological indices of vaginal cervical mucus. The sample included main group (154 patients with acute endometritis) and control group (103 patients with uncomplicated post-natal period). Both groups were subjected to enzyme-linked immunosorbent assay to analyze content of immunoglobulins, components of complement and lysozyme in vaginal cervical mucus. The sampling of diagnostically significant indices was implemented using correlation and cluster analysis techniques. It is established that chief diagnostic indices of local immunity in case of acute endometritis are IG M, sIg A, С4 components of complement and lysozyme. The established diagnostically significant parameters of local immunity provide development of detection of acute endometritis according less number of indices.

[The diagnostic significance and clustering of parameters of systemic humoral immunity under acute endometritis.]

The acute endometritis is an actual medical problem in the structure of gynecological pathology and its complications result in incapacitation, infertility and lethality. The purpose of study is to ameliorate laboratory diagnostic of acute endometritis at the expense of selection of diagnostically significant and similar clusters of systemic humoral immunity. he analysis was carried out concerning parameters of systemichumoral immunity in 154 patients with post-natal acute endometritis and 103 patients with non-complicated post-natal period using the radial immunodiffusion technique. The selection of diagnostically significant parameters was implemented at the basis of indices of shifting, disintegration and cluster analysis method. The leading value for laboratory diagnostic of acute endometritis according indices of shifting, disintegration and cluster analysis among parameters of systemic humoral immunity keep content of IgA in blood, absolute number of SD20+ and circulating immune complexes. The selection of diagnostically significant and similar indices of humoral immunity permits to decrease number of detecting parameters at the diagnostic of acute endometritis.

[The application of flow cytometry technique and diagnostically significant indices of systemic cellular immunity for diagnostic of acute endometritis.]

The acute endometritis is a the most widespread pathology among women of reproductive age.The immune system plays a leading role in its development. However, there is no data concerning the most informative parameters of cell immunity. The purpose of study is to enhance diagnostic of acute endometritis using immunologic technique with objective evaluation of diagnostic value of indices of systemic cell immunity. The indices of cell immunity are analyzed on sampling of 78 patients with postnatal acute endometritis and 54 healthy women. The technique of flow cytometry was applied with subsequent calculation of index of informativeness and disintegration objectifying selection of diagnostically significant parameters. It is demonstrated that full-fledged diagnostic of acute endometritis requires detection of absolute and relative content of T-helpers and natural killers having high value of informativeness and disintegration. Hence an opportunity to reduce number of analyzed parameters of systemic cell immunity and financial costs of diagnostic of acute endometritis.