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

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

What was studied? 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

What was studied? 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 microbiota imbalance and its correlations with hormone and inflammatory factors in patients with stage 3/4 endometriosis

What was studied? The study investigated the role of gut microbiota in endometriosis (EM), focusing on its differences between individuals with stage 3/4 EM and healthy controls and how these differences correlate with serum hormone levels and inflammatory cytokines. Who was studied? The research involved 12 patients diagnosed with stage 3/4 endometriosis and 12 […]

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

What Was Studied 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.

What was reviewed? 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

What was studied?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

What was studied? 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 induces gut microbiota alterations in mice

What was studied? The research focused on investigating the impact of murine endometriosis on gut microbiota composition using high-throughput DNA sequencing to explore how the disease affects intestinal microbial communities. Who was studied? The study subjects were mice. These animals were divided into two groups: one group with induced endometriosis through the intraperitoneal injection […]

2025-03-18

Endometriosis and adenomyosis: shared pathophysiology

What was studied? 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

What was studied?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 […]

2025-03-18

Effectiveness of Partially Hydrolyzed Guar Gum on Cognitive Function and Sleep Efficiency in Healthy Elderly Subjects in a Randomized, Double-Blind, Placebo-Controlled, and Parallel-Group Study

What Was Reviewed? The study reviewed the effectiveness of partially hydrolyzed guar gum (PHGG), a water-soluble prebiotic dietary fiber, on cognitive function, sleep efficiency, and overall mental health in elderly individuals. The research specifically focused on assessing the impact of PHGG supplementation on cognitive domains such as visual memory and simple attention, sleep quality parameters […]

2025-03-18

Does Exposure of Lead and Cadmium Affect the Endometriosis?

The study links lead and cadmium exposure to increased endometriosis risk, emphasizing lead’s role at low blood levels and synergistic effects with cadmium. It advocates for strict monitoring and preventive measures to minimize exposure.

2025-03-18

Dioxin-like PCBs and Endometriosis

What was studied? The study focused on the potential impact of environmental exposure to dioxin-like polychlorinated biphenyls (PCBs) on the development of endometriosis. It specifically reviewed the complexities and challenges of determining the effects of such toxicants on human health, with an emphasis on reproductive tract diseases. Who was studied? The research predominantly referenced […]

2025-03-18

Dioxin-like PCB 126 increases intestinal inflammation and disrupts gut microbiota and metabolic homeostasis.

What was studied? The research focused on examining the effects of PCB 126, a dioxin-like pollutant, on gut health and microbiota as well as metabolic homeostasis in a mouse model predisposed to cardiometabolic diseases. The study investigated how exposure to this pollutant influences the gut microbiome, intestinal and systemic inflammation, metabolic hormones, and the development […]