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Thyroid hormone modulation of VIP’s induced salivary secretion in the submaxillary glands of rats

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Abstract

The effect of changes in thyroid function upon vasoactive intestinal peptide (VIP) induced secretion of saliva were studied in male Wistar rats. Hyperthyroidism was induced by the sc administration every 12 h of 10 μg/100 g bwof l-triiodothyronine; hypothyroidism was induced by surgical thyroidectomy 2 weeks before the experiments. Preganglionar parasympathetic denervation was induced by sectioning the chorda tympani on the left side. The dose-response curves to increasing doses of VIP showed in the hypothyroid animals increased salivary secretion, while in the hyperthyroid ones the dose-response to the drug was reduced. This effect was seen on both sides, the denervated and the control ones. In the denervated glands there was a marked hypersensitivity to the administration of VIP producing greater responses with the same doses, in the 3 groups of animals. The negative modulation by thyroid hormones of the salivary response to VIP administration is compared with the positive modulation they induce in the salivary response to β-adrenergic and cholinergic drugs.

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Authors and Affiliations

  1. Segunda Catedra de Fisiologia, Facultad de Medicina, Universidad de Buenos Aires, J.E. Uriburu 951, 1114, Capital Federal, Argentina

    Omar R. Tumilasci, A. B. Houssay, N. E. Sosto, C. del V. Paz & V. Varela

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  1. Omar R. Tumilasci
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  2. A. B. Houssay
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  3. N. E. Sosto
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  4. C. del V. Paz
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  5. V. Varela
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Tumilasci, O.R., Houssay, A.B., Sosto, N.E. et al. Thyroid hormone modulation of VIP’s induced salivary secretion in the submaxillary glands of rats. J Endocrinol Invest 9, 51–55 (1986). https://doi.org/10.1007/BF03348063

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  • DOI: https://doi.org/10.1007/BF03348063

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