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

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

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

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

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

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 […]

2025-03-18

Hyperbaric oxygen therapy counteracts Pseudomonas aeruginosa biofilm micro-compartment phenomenon in murine thermal wounds

The study examined the role of biofilms in chronic infections and evaluated whether current medical approaches are effectively targeting biofilm-related infections. Who was studied? The study focused on clinical observations and laboratory analyses involving patients with chronic infections. It analyzed biofilm samples and treatment outcomes in these patients. What were […]

2025-03-18

Gut microbiota in heart failure and related interventions

This review explores the gut-heart axis, highlighting how gut microbiota alterations and metabolites like TMAO and SCFAs contribute to heart failure (HF). It evaluates the gut hypothesis, emphasizing bacterial translocation and inflammation in HF, and discusses potential interventions.

2025-03-18

Gut microbiota in early pediatric multiple sclerosis: a case−control study

This study explored the gut microbiota of children diagnosed with early-onset pediatric multiple sclerosis (MS) and compared it to controls of similar age and sex. The researchers aimed to identify gut microbial community differences, including taxonomic and functional perturbations, and examined the influence of immunomodulatory drug (IMD) exposure. This study also predicted […]

2025-03-18

Gut and oral microbial compositional differences in women with breast cancer, women with ductal carcinoma in situ, and healthy women

This study reveals distinct gut microbiota profiles in breast cancer and DCIS patients, with reduced alpha diversity and functional shifts linked to inflammation. Major microbial associations, including enriched Bacteroides guilds, underscore potential microbiome-targeted interventions. Oral microbiota showed minimal differences, highlighting the gut’s critical role in breast cancer progression.

2025-03-18

Fruit and vegetable consumption and risk of endometriosis

This study explored the potential link between the consumption of fruits and vegetables and the risk of laparoscopically confirmed endometriosis. Using data collected from the Nurses’ Health Study II, the researchers analyzed dietary habits over a 22-year period, investigating whether certain food groups and nutrients influenced the likelihood of developing endometriosis. Who […]

2025-03-18

Evidence for clinical interventions targeting the gut microbiome in cardiometabolic disease.

The review evaluated the evidence for clinical effects of various microbiome-targeted interventions (MBTIs) on cardiometabolic traits. The interventions assessed included dietary changes, dietary supplementation, prebiotics, probiotics, synbiotics, and other therapeutic strategies targeting the gut microbiome. The review aimed to understand how these interventions influence cardiometabolic health outcomes and to identify the mechanisms […]

2025-03-18

Epigenetics of endometriosis

The review focused on the role of epigenetic changes in endometriosis, exploring how these modifications influence the disease’s etiopathogenesis, diagnosis, and therapeutic approaches. It reviewed existing evidence up to June 2009, linking epigenetic aberrations such as DNA methylation and histone modification to endometriosis, and discussed the potential of these aberrations in developing non-surgical […]

2025-03-18

Endometriosis of the lung: A case report and brief review of the literature

The study focused on pulmonary endometriosis, a rare condition characterized by the presence of endometrial tissue in the lungs. It analyzed a series of historical and recent cases, dividing them into two distinct groups based on the characteristics of the lung lesions and their association with pregnancy and endometrial glands. The study […]

2025-03-18

Endometriosis and adenomyosis: shared pathophysiology

The study focused on the pathophysiology, genetic variants, and epigenetic abnormalities underlying endometriosis and adenomyosis. It emphasized the mechanisms through which these conditions develop, the somatic mutations and epigenetic changes in endometrial and adenomyotic tissues, and the clinical implications of these findings. The primary genetic alterations studied include mutations in the […]

2025-03-18

Endometrial whole metabolome profile at the receptive phase: influence of Mediterranean Diet and infertility

The study focused on analyzing the receptive-phase endometrial metabolome profiles among women with infertility and examining their associations with adherence to the Mediterranean Diet (MD). It aimed to identify metabolomic signatures that could influence the intrauterine environment and impact reproductive outcomes. Who was studied?The study involved 45 women of infertile couples, recruited at the […]