Sökning: "CYP11B1"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet CYP11B1.

  1. 1. Interaction of Xenobiotics with the Glucocorticoid Hormone System in vitro

    Författare :Maria Johansson; Helen Håkansson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; DDT; PCB; tolylfluanid; adrenal; CYP11B1; glucocorticoid receptor; endocrine disrupter; Biologi; Biology; Biologi; Ecotoxicology; ekotoxikologi;

    Sammanfattning : Persistent environmental pollutants were examined for their interaction with the glucocorticoid hormone system. The focus was placed on interference with the glucocorticoid synthesis and the glucocorticoid-signalling pathway in various in vitro test systems. LÄS MER

  3. 2. Adrenocorticolysis Induced by 3-MeSO2-DDE : Mechanisms of Action, Kinetics and Species Differences

    Författare :Veronica Lindström; Ingvar Brandt; Ulrika Bergström; Eva Brittebo; Hans Tjälve; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Toxicology; 3-methylsulphonyl-DDE; o; p -DDD; CYP11B1; adrenal cortex; tissue-specific toxicity; bioactivation; kinetics; Y-1 cells; Toxikologi; Biology; Biologi;

    Sammanfattning : The DDT metabolite 3-methylsulphonyl-DDE (3-MeSO2-DDE) induces cell death specifically in the adrenal cortex of mice after a cytochrome P45011B1 (CYP11B1)-catalysed bioactivation. This substance is not only an environmental pollutant, but also a suggested lead compound for an improved chemotherapy of adrenocortical carcinoma (ACC). LÄS MER

  4. 3. In Vitro Studies of Adrenocorticolytic DDT Metabolites, with Special Focus on 3-methylsulfonyl-DDE

    Författare :Vendela Asp; Ingvar Brandt; Ulrika Bergström; Olle Söder; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicity; 3-methylsulfonyl-DDE; CYP; adrenal cortex; metabolic activation; steroid hormones; Y-1; H295R; mitotane; adrenocortical carcinoma; Toxicology; Toxikologi; Biologi med inriktning mot ekotoxikologi; Biology with specialization in Environmental Toxicology;

    Sammanfattning : The DDT metabolite 3-methylsulfonyl-DDE (3-MeSO2-DDE) is bioactivated by cytochrome P450 11B1 (CYP11B1) in the adrenal cortex of mice and forms irreversibly bound protein adducts, reduces glucocorticoid secretion, and induces cell death selectively in cortisol-producing adrenocortical cells. 3-MeSO2-DDE has therefore been proposed as a lead compound for an improved adrenocortical carcinoma (ACC) therapy. LÄS MER

  5. 4. Functional and diagnostic aspects on adrenocortical adenoma

    Författare :Ulla Enberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Adrenocortical tumours are frequently detected due to increased use of imaging techniques like computed tomography, magnetic resonance imaging or ultrasound. The majority of the patients have tumours that do not have any overproduction of hormone. LÄS MER

  7. 5. Adrenal Bioactivation and Toxicity of 3-MeSO2-DDE, o,p´-DDD and DMBA Investigated in Tissue Slice Culture

    Författare :Örjan Lindhe; Jan Alexander; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; adrenal cortex; 3-MeSO2-DDE; o; p´-DDD; DMBA; bioactivation; binding; toxic; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Ecotoxicology; ekotoxikologi;

    Sammanfattning : I developed a precision-cut adrenal slice culture procedure to investigate cytochrome P450 (CYP) catalysed irreversible binding and adrenocorticolytic effects in human, rodent, and fish adrenal tissue, ex vivo. Autoradiography and radioluminography of exposed tissue slices showed that the potent adrenal toxicant 3-methylsulphonyl-2,2´-bis(4-chlorophenyl)-1,1´-dichloroethene (MeSO2-DDE) causes a selective metabolite binding in zona fasciculata (ZF), which is diminished by the CYP11B1 inhibitor metyrapone. LÄS MER