Karen Pendergrass

Karen Pendergrass, Standards Team

About

Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.

Recent Posts

2025-03-18

Müllerian duct anomalies coincident with endometriosis: a review

What was studied?The study reviewed the relationship between Müllerian duct anomalies (MDAs) and endometriosis, focusing on their coexistence and the underlying pathophysiological theories that might explain their association. It extensively covered the embryology, genetics, and pathophysiology of MDAs, alongside the American Society for Reproductive Medicine (ASRM) classification of these anomalies. The review also detailed different […]

2025-03-18

Molecular detection of microbial colonization in cervical mucus of women with and without endometriosis

What was studied? The study investigated the microbiota in the cervical mucus of women with and without endometriosis using next-generation sequencing (NGS) technologies. It aimed to clarify whether cervical mucus in women with endometriosis is contaminated with bacteria, which could potentially transmigrate into the intrauterine cavity, influencing the pathogenesis of endometriosis. The research explored the […]

2025-03-18

Molecular detection of intrauterine microbial colonization in women with endometriosis

What was studied? The research focused on investigating microbial colonization in women’s intrauterine environment and cystic fluid, utilizing a molecular approach to detect bacterial presence. This involved examining variations in bacterial types and their implications in the context of endometriosis and treatment effects. Who was studied? The study included 32 women, evenly divided between those […]

2025-03-18

Molecular Alteration Analysis of Human Gut Microbial Composition in Graves’ disease Patients

What was studied?The study investigated the gut microbial composition in patients with Graves’ disease (GD) compared to healthy controls. Who was studied?The study involved 27 GD patients and 11 healthy controls, with fecal samples collected for analysis. What were the most important findings? The association between gut microbiota and host homeostasis is pivotal […]

2025-03-18

Microbiota composition and distribution along the female reproductive tract of women with endometriosis

What was studied? The study investigated the microbiota distribution across the entire female reproductive tract of endometriosis (EMS) patients and non-EMS women, aiming to identify EMS-specific bacterial species and examine the relationship between flora and disease development. Who was studied? Fifty women undergoing laparoscopic surgery for benign gynecological diseases or pelvic endometriosis at Peking […]

2025-03-18

Microbiome-targeted interventions for the control of oral-gut dysbiosis and chronic systemic inflammation

What was studied? The study focused on the relationship between oral-gut dysbiosis and chronic systemic inflammation, particularly in the context of periodontitis and its associated diseases. It reviewed the mechanisms underlying the crosstalk between the microbiome and the host, and explored novel precision medicine approaches aimed at controlling systemic inflammation by modulating the microbiome. The […]

2025-03-18

Microbiome of the lower genital tract in Chinese women with endometriosis by 16s-rRNA sequencing technique: a pilot study

What was studied? The study investigated the relationship between the genital tract microbiota and endometriosis, particularly focusing on how microbiota diversity and specific bacteria like Atopobium might be associated with the disease. Who was studied? 68 participants, from whom 134 samples were collected from the cervical canal, posterior fornix, and uterine cavity for 16s-rRNA […]

2025-03-18

Microbial Dysbiosis Is Associated with Human Breast Cancer

Microbial dysbiosis, marked by reduced bacterial load and altered species composition, is linked to breast cancer progression. Enrichment of Methylobacterium radiotolerans in tumors and depletion of Sphingomonas yanoikuyae in normal tissue suggest diagnostic and therapeutic potential for microbiota-based interventions in breast cancer.

2025-03-18

Metalloestrogens exposure and risk of gestational diabetes mellitus: Evidence emerging from the systematic review and meta-analysis

What Was Reviewed? The systematic review and meta-analysis examined the relationship between exposure to metalloestrogens—specifically arsenic (As), antimony (Sb), chromium (Cr), cadmium (Cd), copper (Cu), selenium (Se), and mercury (Hg)—and the risk of developing gestational diabetes mellitus (GDM). This review aimed to aggregate findings from observational studies to better understand how these metals, which have […]

2025-03-18

Meta-analysis of gut microbiome studies identifies disease-specific and shared responses

What was studied?The meta-analysis focused on the human gut microbiome’s association with various diseases by analyzing 28 published case-control gut microbiome studies covering ten diseases. The researchers aimed to standardize the processing and analysis of these datasets to identify consistent patterns and shifts in the gut microbiome associated with specific diseases or a generalized health-disease […]

2025-03-18

Long-term use of gonadotropin-releasing hormone analogs and hormone replacement therapy in the management of endometriosis: a randomized trial with a 6-year follow-up

Who was studied? The study included forty-nine symptomatic women diagnosed with endometriosis via laparoscopy, who volunteered to participate in the randomized trial. These women were undergoing treatment with long-acting GnRH agonists and were subsequently monitored for up to six years. What were the most important findings? The study’s key findings indicate that long-term use […]

2025-03-18

Lippia origanoides derivatives in vitro evaluation on polymicrobial biofilms: Streptococcus mutans, Lactobacillus rhamnosus and Candida albicans

What was studied? The study investigated the antimicrobial effects of essential oils derived from the Colombian plant Lippia origanoides, specifically focusing on two terpenes, thymol and carvacrol, against polymicrobial biofilms of Streptococcus mutans, Lactobacillus rhamnosus, and Candida albicans. The study also assessed the cytotoxic effects of these compounds on human skin keratinocytes (HaCaT) and periodontal […]

2025-03-18

Influence of heavy metal exposure on gut microbiota: Recent advances

What was studied? The study investigated the impact of heavy metal exposure on the composition and function of gut microbiota. Specifically, it looked at how heavy metals such as arsenic, cadmium, lead, and mercury affect the diversity, richness, and metabolism of gut bacteria. Who was studied? The research encompassed various model organisms, including humans, […]

2025-03-18

Inflammatory cytokines IL-6, IL-10, IL-13, TNF-α and peritoneal fluid flora were associated with infertility in patients with endometriosis

What was studied? The study investigated the relationship between inflammatory markers (IL-6, IL-10, IL-13, and TNF-α), the composition of bacterial flora in peritoneal fluid, and infertility in patients with endometriosis. Who was studied? The participants included 55 patients diagnosed with endometriosis and infertility (observation group) attending a Gynecology Clinic from June 2014 to July […]

2025-03-18

In vitro antibiofilm, antibacterial, antioxidant, and antitumor activities of the brown alga Padina pavonica biomass extract

What was studied? The study focused on evaluating the antibiofilm, antibacterial, antioxidant, and anticancer activities of the methanolic extract of the marine algae Padina pavonica L. Who was studied? The subjects of the study were various microorganisms including Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, Klebsiella pneumoniae, Bacillus subtilis, Escherichia coli, Pseudomonas fluorescens, and Streptococcus […]