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Background: While it is established that vertebrate-like steroids, particularly estrogens (estradiol, estrone) and androgens (testosterone), are present in various tissues of molluscs, it is still unclear what role these play in reproductive endocrinology in such organisms. This is despite the significant commercial shellfishery interest in several bivalve species and their decline.
Methodology/principal Findings: Using suppression subtraction hybridisation of mussel gonad samples at two stages (early and mature) of gametogenesis and (in parallel) following controlled laboratory estrogen exposure, we isolate several differentially regulated genes including testis-specific kinases, vitelline lysin and envelope sequences.
Conclusions: The differentially expressed mRNAs isolated provide evidence that mussels may be impacted by exogenous estrogen exposure.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3144882 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0022326 | PLOS |
J Neuroendocrinol
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Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina.
Benzophenones (BPs) are widely used as ultraviolet (UV) filters in personal care products, plastics, and food packaging. Although they serve as effective photoprotective agents, growing evidence suggests that BPs can act as endocrine-disrupting chemicals (EDCs), interfering with hormone regulation and reproductive functions. This review summarizes the current knowledge on BP exposure, metabolism, and their potential effects on reproductive health.
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September 2025
School of Public Health, Key Laboratory of Special Environmental and Health Research, Xinjiang Medical University, Urumqi, China.
Humans' exposure to arsenic (As) has been associated with the development of various diseases. Some health effects may be mediated by arsenic-induced toxicity to the thyroid and endocrine systems, but its underlying mechanisms remain unclear. The overall aim of our study was focused on using sodium arsenite (NaAsO)-exposed rats to investigate the involvement of the phosphatidylinositol 3-kinase (PI3K) and transcription factor NF-E2-related factor 2 (Nrf2) pathways in toxicity to the thyroid and endocrine systems.
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The Framingham Heart Study, Framingham, MA, USA.
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Sidney Kimmel Comprehensive Cancer Center and Department of Oncology, Johns Hopkins University, Baltimore, MD, USA.
Triple-negative breast cancer (TNBC) lacks expression of estrogen receptor (ER), progesterone receptor (PR), and HER2, and remains one of the most aggressive and therapeutically challenging breast cancer subtypes, marked by early relapse, metastasis, and limited targeted treatment options. In a recent study published in The Journal of Pathology, Kuo et al provide compelling evidence that nicotine exposure, whether from tobacco smoke or e-cigarette vapor, drives TNBC progression by promoting stem-like and metastatic phenotypes. Integrating clinical datasets, patient tissues, cell lines, and in vivo models, the authors demonstrate that nicotine enhances tumor aggressiveness via coordinated upregulation of CHRNA9 and IGF1R.
View Article and Find Full Text PDFJ Vis Exp
August 2025
The Ragon Institute of Mass General, MIT, and Harvard Main Street;
Ultraviolet B (UVB) radiation (280-320 nm) has been recognized as a carcinogen since 1928, leading to sun exposure minimization. However, epidemiological studies suggest that sun exposure correlates with increased life expectancy and reduced incidence of cardiovascular diseases and certain cancers such as colon and endometrial cancer. UVB exposure also influences liver metabolism, protects against hepatocellular lipotoxicity, and affects metabolic health.
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