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  • 1
    ISSN: 1432-0428
    Schlagwort(e): VIP ; radioimmunoassay ; immunocytochemistry ; eyes ; urinary bladder ; prediabetes ; diabetic Chinese hamsters
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The eyes and urinary bladder of non-diabetic, prediabetic and diabetic Chinese hamsters were evaluated by radioimmunoassay and immunocytochemistry to determine the content and distribution of vasoactive intestinal peptide (VIP). The average concentration of VIP was increased in the eyes of all diabetic (pmol/g = 68%, pmol/organ = 50%) and prediabetic (pmol/g = 152%, pmol/organ = 115%) hamsters compared with age-matched non-diabetic animals. Immunocytochemistry showed that the elevation of VIP was primarily related to greater intensity of fluorescence of the nerve fibres in the vasculature of the choroid. The average content of VIP in the urinary bladder was greater in diabetic animals only on the basis of pmol/organ (135%) and in prediabetics on the basis of pmol/g (87%) compared with non-diabetic animals. Qualitative immunocytochemistry suggested that the elevated level of VIP was related to a larger distribution of nerve fibres in the urinary bladder of diabetic hamsters. The high level of VIP in the eyes and urinary bladder of diabetic and prediabetic hamsters is an interesting observation which should receive further study to determine whether it is an aetiological agent underlying the pathogenesis of ophthalmic complications and neurogenic bladder or the result of some pathological process which affects these organs.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-0428
    Schlagwort(e): Chinese hamster ; prediabetes ; diabetes diet-limitation ; diabetes prevention ; diabetes ameliorati on, and increased longevity.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Prediabetic Chinese hamsters born of two ketonuric diabetic parents were hyperphagic from birth. Carcass lipids and total solids were increased but plasma and pancreatic insulin were not, suggesting that hyperphagia was not due to hyperinsulinism. Hyperphagia was controlled by diet limitation of prediabetic pups. Diet limitation for the weaning period only did not alter development of diabetes, but diet limitation for the first 150 days significantly reduced onset and severity. These 150 day diet-limited prediabetics were switched to nonrestricted feeding and subsequently developed mild diabetes. Prediabetic siblings, fedad libitum, developed glucosuria and ketonuria, and died prematurely compared with diet-limited siblings. Prediabetics limited to a normal food intake for 30 months have remained essentially clinically normal. The data strongly suggest that appetite control mechanisms are abnormal prior to clinical signs of diabetes in the prediabetic Chinese hamster and that control of hyperphagia will retard anameliorate the course of diabetes.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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