Summary
The percentage of peptidergic (A1 and A2) and adrenergic (B) neurosecretory terminals was studied in the neurohypophysis of sexually mature female sturgeons. Neurosecretory terminals of the A2 type prevail in the neurohypophysis, whereas A1 and B terminals are rare. The activity of these types of terminals was established (1) during upstream migration, (2) shortly after spawning, and (3) three to six weeks after spawning. Terminals of B type are the most active elements during all the periods studied. These elements become strongly activated in sturgeons during upstream migration, i.e., earlier than the peptidergic neurosecretory terminals. Peptidergic terminals, especially elements of type A2, become synchronously and strongly activated in fish shortly after spawning. In the late postspawning period neurosecretory terminals of all three types become synchronously inactive, persisting in a quiescent state in comparison to the two previous periods. The appearance of neurosecretory material discharged into the intercellular clefts by exocytosis correlates on the whole with the activity level of the A1 and A2 terminals in each individual studied. A functional correlation exists between the activity of the peptidergic and adrenergic neurosecretory terminals in the neurohypophysis. The data obtained are discussed with reference to a concept regarding spawning in some fish species as a physiological stress (Polenov et al., 1976). A possible dual control (peptide and monoamine neurohormones) over the function of visceral organs and glandular cells of the intermediate lobe of the hypophysis is also suggested (Polenov, 1970, 1975, 1978; Polenov and Belenky, 1973).
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References
Acher, R., Chauvet, J., Chauvet, M.-Th.: Phylogeny of the neurohypophysial hormones. The active peptides of a primitive fish, the sturgeon (Acipenser sp.). Eur. J. Biochem. 10, 585–589 (1973)
Altufyev, Yu. V.: The functional state of the hypothalamo-posthypophysial neurosecretory system and gonads of the sexually mature sterlet, Acipenser ruthenus L., during the annual cycle in natural and industrial conditions. Leningrad: Thesis 1977
Barannikova, I.A.: Hormonal regulation of reproduction and the question of stimulation of fish gonad maturation in connection with the problems of fishing industry. In: Hormonal regulation of the sexual cycle of fishes (Barannikova, I.A., ed.), Vol. 111, part 1, pp. 23–33. Moscow: Pyzhchevaya Promyshlennost 1975
Belenky, M.A.: Some principles of the morpho-functional evolution of neurohemal regions of the hypothalamo-hypophysial system. In: Proc. 1st All-Union Conf. on Neuroendocrinology (Polenov, A.L., ed.), pp. 16–18. Leningrad 1974
Belenky, M.A.: Ultrastructure of the neurohypophysis in the lamprey Lampetra fluviatilis. J. Evol. Biochem. Physiol. (Leningrad) 11, 605–611 (1975)
Belenky, M.A.: Morpho-functional evolution of the neurohemal regions of the hypothalamohypophyseal system. In: Neurosecretion and Neuroendocrine Activity (Bargmann, W., Oksche, A., Polenov, A., Scharrer, B., eds.). VIIth Internat. Symposium on Neurosecretion, pp. 44–51. Berlin-Heidelberg-New York: Springer 1978
Belenky, M.A., Garlov, P.E.: Some peculiarities of the neurohypophysial ultrastructure in the sturgeon. Tsitologiya (Leningrad) 18, 796–799 (1976)
Belenky, M.A., Chetverukhin, V.K., Polenov, A.L.: The hypothalamo-hypophysial system of the frog Rana temporaria. I. Morphometric analysis of functional states of the median eminence. Gen. Comp. Endocrinol. 21, 241–249 (1973)
Castel, M., Hochman, J.: Ultrastructural immunohistochemical localization of vasopressin in the hypothalamic-neurohypophysial system of three murids. Cell Tissue Res. 174, 69–81 (1976)
Dempsey, G.P., Bullivant, S., Watkins, W.B.: Ultrastructure of the posterior pituitary gland and evidence of hormone release by exocytosis as revealed by freeze-fracturing. Z. Zellforsch. 143, 465–484 (1973)
Follett, B.K., Heller, H.: The neurohypophysial hormones of bony fishes and cyclostomes. J. Physiol. (London) 172, 74–91 (1964)
Garlov, P.E.: Morpho-functional analysis of the state of the neurohypophysis in the humpback salmon, Oncorhynchus gorbuscha (Walb.), in connection with ecology of reproduction. In: Ecology and taxonomy of the salmonoid fishes (Skarlato, O.A., ed.), pp. 22–27. Leningrad 1976
Garlov, P.E., Belenky, M.A., Polenov, A.L.: Quantitative ultrastructural analysis of neurosecretory elements of the neurohypophysis in the female sturgeon Acipenser güldenstädti with special reference to spawning. J. Evol. Biochem. Physiol. (Leningrad), 14, 566–570 (1978)
Heller, H.S., Zaidi, S.M.A., Polenov, A.L., Garlov, P.E.: On oxytotic and antidiuretic activities and two types of neurosecretory substance in the neurohypophysis of the female sturgeon, Acipenser güldenstädti Brandt before and after spawning. Proc. CNIORKH Conf., pp. 40–42. Astrakhan 1972
Honma, J., Tamura, E.: The hypothalamic neurosecretory system of the nikko-iwana, Salvelinus leucomaenis Pluvius (Hilgendorf). Bull. Jap. Sci. Fisheries 31, 878–887 (1965)
Kornienko, G.G.: Ecologo-histophysiological analysis of the neurohypophysis-metaadenohypophysis complex of the female sazan before and after spawning. Tsitologiya (Leningrad) 18, 1305–1312 (1976)
Lederis, K.: Neurosecretion and the functional structure of the neurohypophysis. In: Handbook of Physiology, section 7, Endocrinology, Vol. IV, part 1 (Knobil, E., Sawyer, W.H., ed.), pp. 81–102. Amer. Physiological Society Washington 1974
Normann, T.Ch.: Neurosecretion by exocytosis. Int. Rev. Cytol. 46, 1–77 (1976)
Polenov, A.L.: Morpho-functional foundations of neurosecretory (peptidergic) and adrenergic regulating mechanisms of the hypothalamus. In: Proc. of theXIth All-Union Congress of I.P. Pavlov Physiological Society (Chernigovsky, V.N., ed.), Vol. 1, pp. 311–315. Leningrad: “Nauka” 1970
Polenov, A.L.: On the life course and the secretory cycle of the hypothalamic neurosecretory cells. Arch. Anat. Histol. Embryol. (Leningrad) 67, 5–19 (1974)
Polenov, A.L.: Hypothalamic control of reproduction in fish. In: Hormonal regulation of the sexual cycle of fishes (Barannikova, I.A., ed.), part 1, pp. 54–69. Moscow: Pyzhchevaya Promyshlennost 1975
Polenov, A.L.: Evolutionary basis of the general principle of neuroendocrine regulation. Interaction of peptide and monoamine neurohormones in a dual control mechanism. In: Neurosecretion and Neuroendocrine Activity (Bargmann, W., Oksche, A., Polenov, A., Scharrer, B., eds.). VIIth Internat. Symposium on Neurosecretion, pp. 15–30. Berlin-Heidelberg-New York: Springer 1978
Polenov, A.L., Belenky, M.A.: Some regularities of the development of neurohemal parts of the hypothalamo-hypophysial neurosecretory system in ontogeny and phylogeny of vertebrates. J. Evol. Biochem. Physiol. (Leningrad) 9, 355–363 (1973)
Polenov, A.L., Garlov, P.E.: The hypothalamo-hypophysial system in Acipenseridae. III. The neurohypophysis of Acipenser güldenstädti Brandt and Acipenser stellatus Pallas. Z. Zellforsch. 136, 461–477 (1973)
Polenov, A.L., Garlov, P.E., Konstantinova, M.S., Belenky, M.A.: The hypothalamo-hypophysial system in Acipenseridae. II. Adrenergic structures of the hypophysial neuro-intermediate complex. Z. Zellforsch. 128, 470–481 (1972)
Polenov, A.L., Belenky, M.A., Konstantinova, M.S.: The hypothalamo-hypophysial system of the lamprey, Lampetra fluviatilis L. I. The neurohypophysis. Cell Tissue Res. 150, 505–519 (1974)
Polenov, A.L., Garlov, P.E., Koryakina, E.D., Faleeva, T.I.: The hypothalamo-hypophysial system in Acipenseridae. V. Ecological-histophysiological analysis of the neurohypophysis of the female sturgeon Acipenser güldenstädti Brandt during upstream migration and after spawning. Cell Tissue Res. 170, 113–128 (1976)
Santolaya, R.C., Bridges, I.E., Lederis, K.: Elementary granules, small vesicles and exocytosis in the rat neurohypophysis after acute haemorrhage. Z. Zellforsch. 125, 277–288 (1972)
Scharrer, B., Wurzelmann, S.: Neurosecretion. XVI. Protrusions of bounding membranes of neurosecretory granules. Cell Tissue Res. 184, 79–85 (1977)
Theodosis, D.T., Burlet, C., Boudier, J.-L., Dreifuss, J.J.: Morphology of membrane changes during neurohypophyseal hormone release in a hibernating rodent. Brain Res. 154, 371–376 (1978)
Vlasenko, A.D., Sheveleva, N.N., Polenov, A.L.: A preliminary study of the functional state of the neurohypophysis in the male sturgeon before and after spawning. Abstracts of a CNIORKH Conf. (Astakhova, T.V., ed.), pp. 109–110. Guriev 1976
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Dedicated to the memory of Professor Wolfgang Bargmann, a great scientist and a generous friend
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Polenov, A.L., Belenky, M.A. & Garlov, P.E. The hypothalamo-hypophysial system in acipenseridae. Cell Tissue Res. 203, 311–320 (1979). https://doi.org/10.1007/BF00237245
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DOI: https://doi.org/10.1007/BF00237245