Search results for "sex steroids"

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Sex steroids, carcinogenesis, and cancer progression

2004

The relationship between sex steroids and cancer has been studied for more than a century. Using an original intact cell analysis, we investigated sex steroid metabolism in a panel of human cancer cell lines, either hormone responsive or unresponsive, originating from human breast, endometrium, and prostate. We found that highly divergent patterns of steroid metabolism exist and that the catalytic preference (predominantly reductive or oxidative) is strictly associated with the steroid receptor status of cells. We explored intra-tissue concentrations and profiles of estrogens in a set of human breast tumors as compared to normal mammary tissues, also in relation to their estrogen receptor s…

Receptor StatusTime FactorsIntratumor estrogenCatecholsBreast cancer; Intratumor estrogens; Sex steroids; Adsorption; Androstenedione; Animals; Breast Neoplasms; Catalysis; Catechols; Cell Line Tumor; Chromatography High Pressure Liquid; Disease Progression; Estradiol; Estrogens; Humans; In Vitro Techniques; Ions; Kinetics; Models Biological; Neoplasms; Steroids; Time Factors; Biochemistry Genetics and Molecular Biology (all)Sex steroidmedicine.disease_causeEndometriumCatalysiBreast cancerNeoplasmsEstrogen Receptor StatusChromatography High Pressure LiquidEstradiolGeneral NeuroscienceSex hormone receptormedicine.anatomical_structureDisease ProgressionSteroidsBreast NeoplasmHumanmedicine.medical_specialtyTime FactorBreast NeoplasmsIn Vitro TechniquesBiologyModels BiologicalCatalysisGeneral Biochemistry Genetics and Molecular BiologyBreast cancerHistory and Philosophy of ScienceCell Line TumorInternal medicinemedicineAnimalsHumansIonSteroidKineticIonsBiochemistry Genetics and Molecular Biology (all)AnimalIn Vitro TechniqueAndrostenedioneCancerEstrogensmedicine.diseaseEstrogenKineticsEndocrinologySex steroidCatecholNeoplasmAdsorptionCarcinogenesis
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Decreased serum levels of sex steroids associated with osteoporosis in a group of Romanian male patients

2016

Abstract Introduction. With age, sex hormone deficiency leads to reduced bone mineral density (BMD) in men. The aim of our research is to analyze the role of serum sex steroids in assessing BMD in the men included in this study. Materials and methods. This cross-sectional study included 146 men aged 65-85 years old with osteopenia or osteoporosis (study group) and 121 men with normal BMD (control group). Serum levels of total testosterone (Tt) and free testosterone (Tf) were measured by immunoassay, and estradiol (E2) levels were measured by the immunoenzymatic method. Femoral neck and lumbar spine BMD was examined by dual-energy X-ray absorptiometry. Results. Tf and E2 deficiency was signi…

musculoskeletal diseasesGynecologymedicine.medical_specialtybusiness.industrymusculoskeletal neural and ocular physiologyOsteoporosisRmenPhysiology030209 endocrinology & metabolismmusculoskeletal systemmedicine.disease03 medical and health sciences0302 clinical medicineMale patientHuman biologyMedicineMedicinesex steroids030212 general & internal medicinebone mineral densitybusinessRevista Romana de Medicina de Laborator
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