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Features of adult neurogenesis and neurochemical signaling in the Cherry salmon Oncorhynchus masou brain

Neural Regeneration Research 2013年第1期8卷 13-23页

作者： Evgeniya V. Pushchina Dmitry K. Obukhov Anatoly A. Varaksin Laboratory of Cytophysiology Institute of Marine Biology Far East Branch Russian Academy of Sciences St. Petersburg State University

We investigated the distribution of gamma aminobutyric acid, tyrosine hydroxylase and nitric oxide-producing elements in a cherry salmon Oncorhynchus masou brain at various stages of postnatal ontogenesis by immunohistochemical staining and histochemical staining. The periventricular region cells exhibited the morphology of neurons and glia including radial glia-like cells and contained several neurochemical substances. Heterogeneous populations of tyrosine hydroxylase-, gamma aminobutyric acid-immunoreactive, as well as nicotinamide adenine dinucleotide phosphate diaphorase-positive cells were observed in proliferating cell nuclear antigen-immunoreactive proliferative zones in periventricular area of diencephalon, central grey layer of dorsomedial tegmentum, medulla and spinal cord. Immunolocalization of Pax6 in the cherry salmon brain revealed a neuromeric construction of the brain at various stages of postnatal ontogenesis, and this was confirmed by tyrosine hydroxylase and gamma aminobutyric acid labeling.

关键词： neural regeneration neurogenesis teleostei adult neurogenesis neurotransmitter signaling migration tyrosine hydroxylase gamma aminobutyric acid development Pax6 NADPH-diaphorase proliferation grant-supported paper neuroregeneration

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Description of a New Species of <i>Sphincteristomum</i>from Sparid Fishies of the Algerian Coast (Western Mediterranean)

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Journal of Environmental Protection 2013年第10期4卷 1129-1136页

作者： Sihem Abid-Kachour Salim Mouffok Zitouni Boutiba Laboratoire Réseau de Surveillance Environnementale Département de Biologie Université d’Oran Oran Algérie.

The objectif in the present study is description of a new species of Sphincteristomum Oshmarin, Mamaev & Parukhin 1961, named Sphincteristomum mediterraneae, which is described in Oran bay, Algeria. It parasitizes the intestine of naturally infected Pagellus erythrinus, teleostei, Sparidae. The Pagellus erythrinus is in important food fish in the Mediterranean. This genus belongs to the family Apocreadiidae, sub family Schistorchiinae, characterized by an obvious oral muscular sphincter, into a large oral sucker, a disc-shaped acetabulum under the intestinal bifurcation, an ocular pigment scattered in the forebody, a sequence ovary and two testes in tandem and a I-shaped excretory bladder. In the new species, the digestive apparatus displays a hexagonal peculiar aperture, followed by a longitudinal slit, a waved pharynx, two long and broad caeca, with a thick internal wall of endothelial cells. Each caecum has a sub terminal anus. The female genital apparatus displays a transversally elongated ovary, under the acetabulum. On the side of the ovary, there is a small Mehlis gland. Under the ovary, there are two transverse converging vitelloducts. Lateral and extracaecal vitelline follicles, are spread near the caeca. They converge in the hindbody. The relatively short uterus is preovarian, mainly. It contains few large yellow eggs. Its distal part is creased transversally, just before ending in genital atrium. The male genital apparatus shows two lobed heart-shaped testes, post ovarian, in tandem. From the anterior edge of each testis, two spermiducts climb up and converge into a naked, curved or sinuous seminal vesicle, followed by a short prostate surrounded by few prostatic cells, and a narrow ejaculatory duct, opening in genital atrium. The genital pore is close to the acetabulum and the intestinal bifurcation. No cirrus pouch. The excretory system shows a relatively short tubular I-shaped bladder, reaching the inferior level of the second testis. Two thin excretor

关键词： Digenea Sphincteristomum Oshmarin Oran bay Pagellus erythrinus teleostei

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Interaction of Atoms with Grain Surfaces in Steel: Periodic Dependence of Binding Energy on Atomic Number and Influence on Wear Resistance

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Engineering（科研） 2012年第10期4卷 76-79页

作者： E. V. Pushchina D. K. Obukhov A. V. Zhirmunski Institute of Marine Biology Far East Division Russian Academy of Sciences ul. Pal'chevskii 17 Vladivostok 690059 Russia ru St. Petersburg State University Universitetskaya Naberezhnaya 7/9 St. Petersburg 199034 Russia

The data of our investigations contribute to understanding of cellular mechanisms of the teleost fishes CNS forming in postembryonic development. The revealed peculiarities of structural and neurochemical organization and description of basic histogenetic processes (proliferation, migration and neuronal cell differentiation) during the brain forming in fish, which have signs of fetal organization, widen the existing knowledge about histogenesis of these structures in postembryonic development. It seems conceivable, that during postembrional development in teleost fishes some neurotransmitters and gaseous mediators (NO and H2S) act as factors, which initiate and regulate the cellular and the tissues processes of genetic program during the brain development. Materials of this investigation define a new experimental model for studying of postembrional neurogenesis processes.

关键词： teleostei Postnatal Neurogenesis Proliferative Cell Nuclear Antigen (PCNA) Neurotransmitter Signaling Migration Tyrosine Hydroxylase GABA Development Pax6 NADPH-diaphorase Nitric Oxide Hydrogen Sulfide Proliferation.

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