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

Presence of metalloestrogens in ectopic endometrial tissue

This study investigated the presence of metalloestrogens in ectopic endometrial tissue from women with endometriosis. Metalloestrogens, heavy metals that can mimic estrogen and may contribute to estrogen-dependent diseases, were the focus, particularly regarding their potential role in the persistence and pathology of endometriosis. The researchers specifically analyzed levels of cadmium, nickel, and […]

2025-03-18

Potential Role of Copper in Diabetes and Diabetic Kidney Disease

This review explores copper’s role in diabetes and diabetic kidney disease, emphasizing its impact on oxidative stress, glycemic control, and renal function. Findings highlight the potential of copper homeostasis as a therapeutic target and the Zn/Cu ratio as a biomarker for diabetes management and DKD progression.

2025-03-18

Possible Therapeutic Mechanisms and Future Perspectives of Vaginal Microbiota Transplantation

The study explored the therapeutic mechanisms and future perspectives of Vaginal Microbiota Transplantation (VMT). It focused on transferring healthy vaginal microbiota from a donor to recipients with dysbiotic vaginal microbiomes to restore normal microbial composition and function. Who was studied? The study didn’t involve direct experimentation on individuals. Instead, it reviewed […]

2025-03-18

Oral-microbiome-derived signatures enable non-invasive diagnosis of laryngeal cancers

This study explored oral microbiome-signatures for diagnosing LSCC non-invasively. Using 16S rRNA sequencing and machine learning, key taxa differences were identified, enabling a predictive model with 85.7% accuracy. The findings suggest oral microbiota’s potential as a stable biomarker, revolutionizing early, non-invasive cancer detection.

2025-03-18

Nickel Allergy as a Risk Factor for Endometriosis

This study identifies nickel allergy as an independent risk factor for endometriosis, highlighting shared immune dysregulation and estrogenic pathways. Using a population-based cohort, researchers found a 2.5-fold increased odds of nickel allergy in women with endometriosis, emphasizing the role of environmental exposures in its pathogenesis.

2025-03-18

New Insights into Photobiomodulation of the Vaginal Microbiome—A Critical Review

The study reviewed the potential effects of photobiomodulation (PBM) on the vaginal microbiome, particularly exploring theoretical and emerging research on how PBM may influence vaginal health through its interaction with microbial communities. Who was studied? The study itself is a review and does not directly study a group of individuals. Instead, […]

2025-03-18

Natural favonols: actions, mechanisms, and potential therapeutic utility for various diseases

The review investigated the biological and medicinal importance of flavonols, particularly their roles in disease prevention and treatment. The focus was on their antioxidative properties and their potential therapeutic utility against diabetes, cancer, cardiovascular diseases, and microbial infections. The key findings highlighted the protective roles of flavonols such as quercetin, myricetin, kaempferol, and fisetin against […]

2025-03-18

Neuromicrobiology, an Emerging Neurometabolic Facet of the Gut Microbiome?

The paper reviews the emerging field of neuromicrobiology, which explores the interactions between the gut microbiome and the brain, particularly focusing on how gut microbiota produce neuroactive metabolites that influence cognitive function and brain health. It addresses the biosynthesis, absorption, and transport of these neuroactive metabolites, including neurotransmitters such as γ-aminobutyric acid […]

2025-03-18

Müllerian duct anomalies coincident with endometriosis: a review

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

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

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

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

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

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 […]