Dr. Umar

This review outlines how hyperuricemia in chronic kidney disease arises from distinct filtration and tubular reabsorption defects, driving inflammation, endothelial dysfunction, and renal decline while highlighting emerging phenotype-guided approaches to therapy.

This study examined chronic exposure to multiple heavy metals and found strong individual and synergistic effects on renal injury biomarkers, revealing metal–metal interactions highly relevant to environmental and microbiome-linked kidney dysfunction.

Nickel exposure induces gut microbiome disorder and serum uric acid elevation by disrupting purine-degrading microbes, increasing inflammatory taxa, impairing intestinal metabolism, and elevating serum uric acid in humans and mice.

This study compared heavy metal exposure and kidney function in Korea, revealing expected nephrotoxicity in the general population but paradoxically preserved eGFR in chronically exposed vulnerable communities.

This case report describes markedly elevated lead, nickel, and bismuth in the peritoneal fluid of a young woman with endometriosis, highlighting dietary and environmental exposure considerations and potential biomarker relevance.

This study examined blood nickel and endometriosis, revealing significantly higher nickel levels in affected Sri Lankan women, supporting a potential metalloestrogenic role.

A study of celiac patients revealed that persistent symptoms during gluten-free eating may stem from nickel allergic contact mucositis. A low-nickel diet significantly improved gastrointestinal and systemic symptoms.

This study links nickel allergy to overweight status in women and shows that a low-nickel diet reduces BMI and waist size while suggesting immunologic and microbiome-related mechanisms.

Study identifying significantly higher zinc and nickel hypersensitivity in IBS patients, suggesting metal-induced immune activation as a contributor to mucosal inflammation and symptom generation.

Urease enables S. aureus to survive acid stress and persist in murine kidneys. Its expression is regulated by CcpA and Agr, and its activity is essential for long-term infection, highlighting a critical microbial adaptation for persistence in acidic microenvironments.

Nickel-dependent enzymes like urease and hydrogenase are essential for pathogen virulence. This review outlines the mechanisms by which pathogens acquire and utilize nickel and explores implications for therapy and microbiome balance.

This study evaluates nickel chelation therapy using DMG against multidrug-resistant Salmonella and Klebsiella. DMG impaired virulence by inhibiting Ni-dependent enzymes, reduced bacterial load in organs, and improved survival in animal models, offering a promising metallomic intervention.

This study demonstrated distinct microbial dysbiosis in breast cancer, highlighting reduced bacterial load, loss of Sphingomonas, enrichment of Methylobacterium, and impaired antibacterial immune signaling in tumor tissue.

This study analyzed breast cancer microbiota using TCGA RNA-seq data, identifying key microbial differences and linking microbes such as H. influenzae and L. fleischmannii to tumor-related gene expression pathways.

This study shows that postmenopausal breast cancer is associated with significant gut microbiome dysbiosis involving pathogenic enrichment, reduced butyrate pathways, and inflammation-related functional shifts.

This study links HER2 status, early menarche, and adiposity to distinct gut microbiome alterations, including reduced diversity and shifts in SCFA-producing taxa, highlighting possible microbial pathways influencing breast cancer biology.

Gut microbiome composition in early breast cancer predicts prognosis, chemotherapy response, and neurological toxicity. Chemotherapy shifts microbial structure toward beneficial species, while mouse models confirm causal effects of patient-derived microbiota on tumor behavior.

Oral microbiome diversity and composition were strongly associated with breast cancer and non-malignant breast disease in Ghanaian women, with notable cross-body correlations to fecal microbes suggesting systemic microbial involvement.

This study identifies early microbial compositional and metabolic disruptions in mammary tissue prior to breast cancer diagnosis, highlighting Streptococcus enrichment, reduced detoxification pathways, and altered microbe–host interactions that may signal early tumor susceptibility.

This study examined the association between gut microbiota and breast cancer, identifying reduced diversity and enrichment of Acidaminococcus, Hungatella, and Tyzzerella in patients, with diet-linked microbial patterns suggesting biomarker and prevention potential.

This study identified significant loss of SCFA-producing gut bacteria in Midwestern breast cancer patients, along with reduced propionate-generating pathways and increased methane-associated metabolism, highlighting dysbiosis with potential inflammatory and metabolic implications for breast cancer biology.

This study identified significant gut, but not oral, microbial alterations distinguishing breast cancer, DCIS, and healthy women, including reduced diversity, Bacteroides enrichment, and inflammation-related functional pathways.

This study used shotgun metagenomics to compare gut microbiota in pre- and postmenopausal breast cancer patients and controls, showing breast cancer—not menopause—drives modest but consistent dysbiosis involving key taxa and functional pathways.

This study identifies distinct gut microbiota alterations in Hashimoto’s thyroiditis, including shifts in key genera, correlations with autoantibodies, and a high-performing microbial biomarker model, supporting a role for dysbiosis in thyroid autoimmunity.