Possible adrenal involvement in hydroxyurea toxicity defense mechanisms. 1985

P Preziosi, and A Nunziata, and S Macrae, and E Ragazzoni, and M Vacca

Changes in blood biochemistry, resembling adrenocortical hyperfunction, induced by oral administration with hydroxyurea (HYD) at a dosage of 800 mg/Kg/d for 5 days (K+ and total protein decrease, total cholesterol increase) are not modified or enhanced (total protein) by adrenalectomy. Adrenalectomy dramatically enhanced the decrease of WBC and neutrophils normally induced by HYD. Replacement therapy with corticosterone attenuated and/or delayed the above changes. Normally-functioning adrenocortical tissue may play a role in protection against HYD haematological toxicity in the rat and the drug-induced hypothalamus pituitary mediated adrenocortical activation seems to represent a mechanism capable of counteracting drug toxicity.

UI MeSH Term Description Entries
D007958 Leukocyte Count The number of WHITE BLOOD CELLS per unit volume in venous BLOOD. A differential leukocyte count measures the relative numbers of the different types of white cells. Blood Cell Count, White,Differential Leukocyte Count,Leukocyte Count, Differential,Leukocyte Number,White Blood Cell Count,Count, Differential Leukocyte,Count, Leukocyte,Counts, Differential Leukocyte,Counts, Leukocyte,Differential Leukocyte Counts,Leukocyte Counts,Leukocyte Counts, Differential,Leukocyte Numbers,Number, Leukocyte,Numbers, Leukocyte
D008297 Male Males
D009503 Neutropenia A decrease in the number of NEUTROPHILS found in the blood. Neutropenias
D010913 Pituitary-Adrenal System The interactions between the anterior pituitary and adrenal glands, in which corticotropin (ACTH) stimulates the adrenal cortex and adrenal cortical hormones suppress the production of corticotropin by the anterior pituitary. Pituitary Adrenal System,Pituitary-Adrenal Systems,System, Pituitary-Adrenal,Systems, Pituitary-Adrenal
D011188 Potassium An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
D001798 Blood Proteins Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins. Blood Protein,Plasma Protein,Plasma Proteins,Serum Protein,Serum Proteins,Protein, Blood,Protein, Plasma,Protein, Serum,Proteins, Blood,Proteins, Plasma,Proteins, Serum
D002784 Cholesterol The principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord, and in animal fats and oils. Epicholesterol
D003345 Corticosterone An adrenocortical steroid that has modest but significant activities as a mineralocorticoid and a glucocorticoid. (From Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1437)
D006918 Hydroxyurea An antineoplastic agent that inhibits DNA synthesis through the inhibition of ribonucleoside diphosphate reductase. Hydroxycarbamid,Hydrea,Oncocarbide
D000315 Adrenalectomy Excision of one or both adrenal glands. (From Dorland, 28th ed) Adrenalectomies

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