Search Results (59)

The uterine microbiota plays a crucial role in maintaining postpartum reproductive health in dairy cows, and its dysregulation is closely associated with uterine diseases. Vaginal discharge characteristics serve as important clinical indicators for assessing uterine status and guiding clinical decision-making. This study employed 16S rRNA gene sequencing to analyze uterine microbial diversity in cows with different discharge types. Results revealed significant microbial shifts associated with discharge severity. Notably, Caviibacter was highly enriched (up to 60.25%) in cows with mildly purulent discharge (<50%), suggesting its potential role in early-stage endometritis. In contrast, Fusobacterium and Helcococcus dominated when purulent discharge exceeded 50%, while Bacteroides, Porphyromonas, and Peptostreptococcus prevailed in cows with malodorous or discolored secretions, indicating severe inflammation. This study extends previous findings by uncovering stage-specific microbial transitions and proposing Caviibacter as a potential early biomarker of endometritis. These insights support early diagnosis and targeted interventions, contributing to improved reproductive management and sustainable dairy farming. Full article

Cervical cancer (CC) is the gynecological cancer with the highest incidence and mortality worldwide. High-risk oncogenic human papillomaviruses (HPV) genotypes 16 and 18 are the primary risk factors for developing this female neoplasm, with them being the etiological agents of 70% of cervical cancers. Despite the availability of various prevention strategies, laboratory tests capable of detecting the disease in its previous and early stages, and multiple treatment schemes, CC incidence and mortality rates remain high, due in part to the population’s rejection or disinterest in the current type of sampling. An alternative that could encourage women to take better care of their gynecological health is the availability of tests that detect biomarkers in non-cervical samples with high sensitivity and specificity. The detection of biomarkers in non-cervical samples (blood, serum, plasma, urine, and vaginal fluids) may help reduce the discomfort associated with cervical sampling in patients, therefore promoting gynecological healthcare. This review discusses current diagnostic methods and recent advances in CC biomarkers detected in non-cervical samples, emphasizing their potential for diagnosis, prognosis, and patient monitoring. We further discuss the challenges and future perspectives of applying these biomarkers in clinical practice. The results of this review show that there is a considerable range of biomarkers proposed as alternative tools with high efficacy. Their identification in previous stages of the disease and routinely in non-cervical samples could help reduce the incidence and mortality rates of CC. Full article

Ovarian cancer remains a formidable global health burden, characterized by frequent late-stage diagnosis and elevated mortality rates attributable to its elusive pathogenesis and the critical lack of reliable early-detection biomarkers. Emerging investigations into the gut–vaginal microbiome axis have unveiled novel pathogenic mechanisms and potential diagnostic targets in ovarian carcinogenesis. This comprehensive review systematically examines the compositional alterations in and functional interplay between vaginal and intestinal microbial communities in ovarian cancer patients. We elucidate three principal mechanistic pathways through which microbial dysbiosis may drive oncogenesis: (1) estrogen-mediated metabolic reprogramming via β-glucuronidase activity; (2) chronic activation of pro-inflammatory cascades (particularly NF-κB and STAT3 signaling); (3) epigenetic silencing of tumor suppressor genes through DNA methyltransferase modulation. We propose an integrative diagnostic framework synthesizing multi-omics data—incorporating microbial profiles, metabolic signatures, pathway-specific molecular alterations, established clinical biomarkers, and imaging findings—within a multifactorial etiological paradigm. This innovative approach aims to enhance early-detection accuracy through machine learning-enabled multidimensional pattern recognition. By bridging microbial ecology with tumor biology, this review provides novel perspectives for understanding ovarian cancer etiology and advancing precision oncology strategies through microbiome-targeted diagnostic innovations. Full article

The female genital microbiota plays a critical role in reproductive health and has recently emerged as a key factor influencing the outcomes of Assisted Reproductive Techniques (ARTs). Beyond traditional concerns about vaginal dysbiosis and infections such as bacterial vaginosis or mycoses, recent evidence highlights the broader impact of genital microbial communities, including the vaginal, cervical, and endometrial niches, on ART success rates. New findings suggest that specific bacterial profiles, as well as shifts in the virome and mycobiome, can significantly affect implantation and pregnancy outcomes. Non-invasive biomarkers such as menstrual blood have also been proposed for assessing endometrial receptivity. Furthermore, growing attention has been directed towards methodological challenges such as contamination risks during microbiota sampling which may influence study reliability. This review synthesizes the latest data on the relationship between the female genital microbiota and ART outcomes, with a focus on standardized microbiological analysis techniques and specific patient populations such as those experiencing recurrent implantation to optimize ART success based on microbiota profiling. Full article

The vaginal microbiome can be perturbed by various intrinsic and extrinsic factors, resulting in a state of dysbiosis that decreases the abundance of commensal lactobacilli and often leads to pathological conditions such as bacterial vaginosis, yeast infections, sexually transmitted infections, and other vaginal disorders. This narrative review explores the molecular and pathophysiological mechanisms of several microbial diseases associated with the dysbiosis of the vaginal microbiome, as well as the efficacy of therapeutic tools for these conditions, such as antibiotic treatment and the use of live biotherapeutic products. A non-systematic, narrative approach was employed. Searches and data extraction were performed using the PubMed and Scopus databases between January and February 2025. All reviewed studies reported vaginal microbiome dysbiosis, with microbial pathogens inducing a specific immune response in the host. Current treatments for vaginal microbiota dysbiosis-related pathologies often result in high relapse and recurrence rates, suggesting microbial resistance and the need for alternative therapeutic strategies. In turn, live biotherapeutic products have demonstrated beneficial effects, restoring microbial balance in dysbiotic conditions. While these findings suggest promising potential for live biotherapeutic products, further rigorous clinical studies are necessary to gain a deeper understanding of the female genital tract ecosystem and to identify novel biomarkers along with their associated health implications. Moreover, the development of new diagnostic and management strategies will facilitate personalized therapeutic approaches. Ultimately, a comprehensive perspective on vaginal care is pivotal, taking into account both microbial and immune dynamics to enhance women’s health outcomes. Full article

The role of vaginal dysbiosis in the progression of human papilloma virus (HPV) associated cervical lesions has gained attention in recent years. While many studies use 16S rRNA gene sequencing for microbiota analysis, shotgun metagenomic sequencing offers higher taxonomic resolution and insights into microbial gene functions and pathways. This systematic review evaluates the relationship between compositional and functional changes in the vaginal microbiome during HPV infection and cervical lesion progression. A literature search was performed according to PRISMA guidelines in PubMed, Web of Science, Scopus, and ScienceDirect databases. Seven studies utilizing metagenomic sequencing in patients with HPV infection or HPV-associated cervical lesions were included. Progression from HPV infection to cervical lesions and cancer was associated with a reduction in Lactobacillus species (particularly Lactobacillus crispatus) and an enrichment of anaerobic and pathogenic species, especially Gardnerella vaginalis. Heterogeneous enriched metabolic pathways were also identified, indicating functional shifts during lesion progression. As most studies were conducted in Asia, further research in diverse regions is needed to improve the generalizability of findings. Future studies employing metagenomic sequencing may help identify biomarkers for early pre-cancerous lesions and clarify the role of vaginal microbiota in persistent HPV infection and cervical dysplasia. Full article

Background and Objectives: Preterm birth (PTB), defined as delivery before 37 weeks of gestation, remains a significant public health concern due to its association with neonatal morbidity and mortality. Although studies have suggested that microbial factors in vaginal microbiota (VMB) influence PTB, longitudinal research on Korean women is limited. This study aimed to analyze VMB differences between term and preterm pregnancies in Korean women and their correlation with the cervical length (CL). Materials and Methods: A cohort of 60 pregnant Korean women (40 who had a term birth (TB) and 20 who had a PTB) was recruited. Vaginal samples were collected at five time points (first, second, and third trimester; 1–2 weeks postpartum; 1–2 months postpartum). Microbial DNA was extracted and analyzed using quantitative PCR targeting 12 bacterial species. The CL was measured in the second and third trimesters. Results: Lactobacillus crispatus was consistently dominant in the TB group, whereas PTB cases exhibited greater microbial diversity with elevated levels of Prevotella salivae and Ureaplasma species. The CL was significantly shorter in PTB cases, correlating with shifts in the VMB composition. Conclusions: A stable, Lactobacillus-dominant microbiome is protective in pregnancy, while increased diversity in PTB cases suggests microbial biomarkers for early risk prediction. Combining VMB profiling with CL measurement may enhance early, non-invasive PTB risk assessments. Full article

Twin pregnancies, with higher incidences of preterm birth, are becoming more prevalent. Progesterone has shown effectiveness in the prevention of preterm labour, though other factors related to pregnancy and neonatal health may be affected by this hormone and have not been previously addressed. This study aims to evaluate the impact of progesterone administration on oxidative stress and bone turnover during twin gestation and investigate associations with some maternal/neonatal variables of interest. Women pregnant with twins were recruited in the “Virgen de la Arrixaca” University Hospital and randomly assigned to two groups: control (n = 49) and progesterone (n = 50). A total of 600 mg/day of progesterone was vaginally administered from 11 to 14 to 34 weeks of gestation. Blood samples were taken in the first (T1) and third trimester (T3), analyzing biomarkers related to oxidative stress and bone turnover. Most bone turnover and oxidative markers experiment with significant changes during gestation. Progesterone administration significantly increased (p < 0.05) the levels of osteocalcin in T3 and decreased (p < 0.05) the levels of sclerostin. Regarding oxidative stress, the progesterone group, unlike the control group, showed no significant increase in oxidative stress between T1 and T3. In conclusion, results show that progesterone administration could increase maternal bone formation and modulate oxidative stress. Full article

Objectives: Early environmental factors have a significant impact on the development of atopic conditions in children. Breastfeeding has been highlighted for its role in enhancing both immune support and cognitive development. Early allergic conditions and maternal behaviors are linked to cognitive and neurodevelopmental challenges. Our study aims to compare children from atopic families focusing on early nutrition and the neuropsychological development of children, especially in the presence of an allergic predisposition. Materials and methods: The study included 120 children with a family history of allergies (55% boys). Children were divided into group A, children breastfed for at least two months, and group B, children breastfed for less than two months or fed with formula. The study measurements and outcomes included demographic and social data, medical data, the smoking status of the parents, breastfeeding and early feeding practices, and anthropometric measurements. The assessment of the neurological development was carried out with a validated Developmental Profile-3 questionnaire. Diagnosis of allergic conditions was carried out with the SCORAD (SCORing Atopic Dermatitis) questionnaire for assessing atopic dermatitis; the CoMiSS (Cow’s Milk-Related Allergy Symptom Score) questionnaire for potential cow’s milk protein allergy and Prick testing and elimination-provocation protocol were used to confirm allergic status in children with atopic conditions. Data were analyzed using Jamovi 2.2.2 software, with statistical significance set at p ≤ 0.05. Results: The age of the examined children was 13 ÷ 31 months, the age of the mothers was 21 ÷ 42 years, and that of the fathers was 22 ÷ 44 years. Educational levels among mothers were 68.35% (n = 54) with higher education in group A and 61.5% (n = 24) in group B, compared to fathers with rates of higher education of, respectively, 54.3% (n = 44) and 38.5% (n = 15). The average gestational age of the children was 38.8 ± 1.08 weeks, and the relative share of cesarean delivery—50.8% (n = 61)—was slightly higher than vaginal delivery. Anthropometric results (HAZ, WAZ, BMIAZ) did not show a statistically significant influence of the type of feeding (breastfeeding, standard formula, or hydrolyzed formula) on growth during the first two months after birth (p > 0.05). During the study period, a significant number of the children developed allergic conditions, which were more common in children from group A—43.2% (n = 35)—compared to group B—38.5% (n = 15). In the families included in the study, mothers smoked more often (53.3%; n = 64) than fathers (43.3%; n = 52), and 13.3% (n = 16) of the women smoked during pregnancy. Children’s neuropsychological development, assessed with the DP-3 questionnaire, according to the duration of breastfeeding, does not show statistically significant differences for the five functional areas (“Physical development”, “Adaptive behavior”, “Social-emotional” Development”, “Cognitive development “, and “Communication”) or the overall development of children from both groups. The neuropsychological development (DP-3) of the group A children showed correlations with the presence of atopic dermatitis, parents’ age, father’s level of education, mother’s smoking during pregnancy, number of cigarettes smoked by the mother per day, and cesarean delivery. Maternal smoking (number of cigarettes per day) had significant negative correlations with all areas of children’s neuropsychological development, which were most pronounced with physical (rho = −0.352; p = 0.001) and overall development (rho = −0.329; p= 0.003). Cesarean delivery moderately correlated with physical development (rho = 0.292; p = 0.008) and adaptive behavior (rho = −0.294; p = 0.008). In group B, neuropsychological development (DP-3) correlates most clearly with allergic conditions (allergy at two years of age and atopic dermatitis), as well as with maternal smoking during pregnancy, with a strong negative correlation with physical development (rho = −0.510; p = 0.001). Conclusions: Our study reinforces the link between early feeding practices, neuropsychological development, and allergic conditions, emphasizing the lasting effects they have on children’s neurological health. However, limitations such as the relatively small sample size and reliance on parental reporting may affect the generalizability of the findings. Future studies with larger cohorts and objective biomarkers for allergic conditions are needed to further validate these results. Full article

The Human Microbiome Project (HMP), initiated in 2007, aimed to gather comprehensive knowledge to create a genetic and metabolic map of human-associated microorganisms and their contribution to physiological states and predisposition to certain diseases. Research has revealed that the human microbiome is highly diverse and exhibits significant interpersonal variability; consequently, its exact impact on health remains unclear. With the development of next-generation sequencing (NGS) technologies, the broad spectrum of microbial communities has been better characterized. The lower female genital tract, particularly the vagina, is colonized by various bacterial species, with Lactobacillus spp. predominating. The upper female genital tract, especially the uterus, was long considered sterile. However, recent studies have identified a distinct endometrial microbiome. A Lactobacillus-dominated microbiome of the female genital tract is associated with favorable reproductive outcomes, including higher success rates in natural conception and assisted reproductive technologies (ART). Conversely, microbial imbalances, or dysbiosis, marked by reduced Lactobacilli as well as an increased diversity and abundance of pathogenic species (e.g., Gardnerella vaginalis or Prevotella spp.), are linked to infertility, implantation failure, and pregnancy complications such as miscarriage and preterm birth. Dysbiosis can impair the vaginal or endometrial mucosal barrier and also trigger pro-inflammatory responses, disrupting essential reproductive processes like implantation. Despite growing evidence supporting the associations between the microbiome of the female genital tract and certain gynecological and obstetric conditions, clear microbial biomarkers have yet to be identified, and there is no consensus on the precise composition of a normal or healthy microbiome. The lack of standardized protocols and biomarkers limits the routine use of microbiome screening tests. Therefore, larger patient cohorts are needed to facilitate comparative studies and improve our understanding of the physiological microbiome profiles of the uterus and vagina, as well as how dysbiosis may influence clinical outcomes. Further research is required to refine diagnostic tools and develop personalized therapeutic strategies to improve fertility and pregnancy outcomes. Full article

Cervical cancer is more common in Sub-Saharan Africa (SSA) compared to developed countries, with persistent genital high-risk HPV (HR-HPV) infection identified as the cause. However, other factors contributing to this gap remain unclear. This review explores the potential role of cervicovaginal microbiota (CVM) in genital HPV infection and cervical cancer development among women in SSA. Many women of African descent, including those from SSA, lack lactobacilli dominance in their CVM, which is considered a biomarker of cervicovaginal health. Published literature has associated Lactobacillus-dominated CVM with a lower risk of HPV infection and cervical cancer. The converse is true for women with high diversity non-Lactobacillus-dominated CVM and bacterial vaginosis, the most common form of vaginal disorder. However, findings on the relationship between specific bacterial abundance and cervical disease severity are inconsistent and inconclusive due to differences in study design, study population, sampling, and potential confounders. Thus, there is a need to form consensus to advance research on CVM and HPV-associated cervical disease. Despite the exact mechanisms by which CVM influence HR-HPV persistence and cervical carcinogenesis being unknown, the backbone of the mechanisms appears to be mediated in part by the following: cervicovaginal dysbiosis, elevated vaginal pH, high ratio of L-to-D-lactic acid, cohesive biofilm formation, chronic inflammation, and immune dysregulation. Consequently, these promote cellular proliferation, genetic instability, and evasion of immune surveillance. This review calls for larger, prospective studies to unravel causal links, identify protective features, and integrate CVM interventions into HPV and cervical cancer prevention strategies in SSA. Full article

Gynecological cancer is a term referring to malignancies that typically involve ovarian, cervical, uterine, vaginal, and vulvar cancer. Combined, these cancers represent major causes of morbidity and mortality in women with a heavy socioeconomic impact. MiRNAs are small non-coding RNAs that are intensively studied in the field of cancer and changes in them have been linked to a variety of processes involved in cancer that range from tumorigenesis to prognosis and metastatic potential. This review aims to summarize the existing literature that has linked miRNAs with each of the female malignancies as potential biomarkers in diagnosis (circulating miRNAs), in tumor histology and prognosis (as tissue biomarkers), and for local (lymph node) and distant metastatic disease. Full article

Hypoxia-inducible factor 1 (HIF-1) may play a role in mammary gland development, milk production and secretion in mammals. Due to the limited number of scientific reports on the expression of HIF genes in colostrum cells, it was decided to examine the expression of HIF1A, HIF3A and EPAS1 in the these cells, collected from 35 patients who voluntarily agreed to provide their biological material for research, were informed about the purpose of the study and signed a consent to participate in it. The expression of HIF genes was assessed using qPCR. Additionally, the influence of clinical parameters (method of delivery, occurrence of stillbirths in previous pregnancies, BMI level before pregnancy and at the moment of delivery, presence of hypertension during pregnancy, presence of Escherichia coli in vaginal culture, iron supplement and heparin intake during pregnancy) on the gene expression was assessed, revealing statistically significant correlations. The expression of HIF1A was 3.5-fold higher in the case of patients with the presence of E. coli in vaginal culture (p = 0.041) and 2.5 times higher (p = 0.031) in samples from women who used heparin during pregnancy. Approximately 1.7-fold higher expression of the EPAS1 was observed in women who did not supplement iron during pregnancy (p = 0.046). To our knowledge, these are the first studies showing the relationship between HIF expression in cells from breast milk and the method of delivery and health condition of women giving birth. The assessment of HIF expression requires deeper examination in a larger study group, and the results of further studies will allow to determine whether HIF can become biomarkers in pregnancy pathology states. Full article

Metritis affects 5–20% of cows after parturition, negatively impacting animal welfare and the profitability of dairy farms, increasing culling rates and costs, and decreasing productivity and reproduction rates. This study compared the results of a comprehensive biochemical panel consisting of 25 salivary and 31 serum analytes between healthy cows (n = 16) and cows with metritis (n = 12). Descriptive parameters such as depression, rectal temperature, body condition score (BCS), heart rate, respiratory rate, mucous color, ruminal motility, vaginal discharge, milk production, and complete hematology analyses were also assessed for comparative purposes. The biochemistry analytes comprised five analytes related to stress, five to inflammation, five to oxidative status, and nineteen to general metabolism. The two-way ANOVA analysis revealed that, in saliva, eight biomarkers (lipase, adenosine deaminase (ADA), haptoglobin (Hp), total proteins, g-glutamyl transferase (gGT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), and creatine kinase (CK)) were significant higher in cows with metritis. In serum, eight biomarkers (ADA, Hp, serum amyloid A (SAA), fibrinogen, ferritin, AOPPs/albumin ratio, non-esterified fatty acids (NEFAs), and bilirubin) were significantly higher in cows with metritis, whereas six (total esterase (TEA), albumin, urea, lactate, phosphorus, and calcium) were lower. Of the total number of 23 biomarkers that were measured in both saliva and serum, significant positive correlations between the two biofluids were found for six of them (Hp, FRAP, CUPRAC, AOPPs, urea, and phosphorus). Urea showed an R = 0.7, and the correlations of the other analytes were weak (R < 0.4). In conclusion, cows with metritis exhibited differences in biomarkers of stress, inflammation, cellular immune system, and general metabolism in both salivary and serum biochemistry profiles. These changes were of different magnitudes in the two biofluids. In addition, with the exception of ADA and Hp, the analytes that showed changes in the saliva and serum profiles of cows affected by metritis were different. Overall, this report opens a new window for the use of saliva as potential source of biomarkers in cows with metritis. Full article

Vulvovaginal candidiasis (VVC) affects up to 75% of women at least once during their lifetime, and up to 8% of women suffer from frequent recurrent episodes of VVC (RVVC). A lack of a protective host response underlies vaginal Candida infections, while a dysregulated hyperinflammatory response may drive RVVC. This study aimed to investigate the systemic inflammatory protein profile in women with RVVC in an African population, considering the potential influence of hormonal contraceptive use on systemic inflammation. Using multiplex Proximity Extension Assay technology, we measured 92 circulatory inflammatory proteins in plasma samples from 158 RVVC patients and 92 asymptomatic women (controls). Hormonal contraceptive use was not found to have a statistically significant correlation with a systemic inflammatory protein profile in either RVVC patients or the asymptomatic women. RVVC women had lower circulating Fibroblast Growth Factor 21 (FGF-21) concentrations compared with healthy controls (adjusted p value = 0.028). Reduced concentrations of FGF-21 may be linked to the immune pathology observed in RVVC cases through IL-1β. This study may help to identify new biomarkers for the diagnosis and future development of novel immunomodulatory treatments for RVVC. Full article