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Agnatha

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Earl T Larson – One of the best experts on this subject based on the ideXlab platform.

  • functional characterization of two melanocortin mc receptors in lamprey showing orthology to the mc1 and mc4 receptor subtypes
    BMC Evolutionary Biology, 2007
    Co-Authors: Tatjana Haitina, Earl T Larson, Janis Klovins, Akiyoshi Takahashi, Maja Lowgren, Aneta Ringholm, Johan Enberg, Hiroshi Kawauchi

    Abstract:

    Background
    The melanocortin (MC) receptors have a key role in regulating body weight and pigmentation. They belong to the rhodopsin family of G protein-coupled receptors (GPCRs). The purpose of this study was to identify ancestral MC receptors in Agnathan, river lamprey.

Hans-joachim Paepke – One of the best experts on this subject based on the ideXlab platform.

  • Kritischer Katalog der Typen der Fischsammlung des Zoologischen Museums Berlin. Teil 2: Agnatha, Chondrichthyes
    Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologisches Museum und Institut für Spezielle Zoologie (Berlin), 2008
    Co-Authors: Hans-joachim Paepke, Karin Schmidt

    Abstract:

    Critical Catalogue of the Types of the Fish Collection of the Zoological Museum Berlin. Part 2: Agnatha, Chondrichthyes

    This paper is the second part of the catalogue of the Agnatha and fish types stored at the Zoological Museum of the Humboldt-University of Berlin. It includes the types of the Agnatha classes Myxini and Cephalaspidomorphi with the orders Myxiniformes and Petromyzontiformes as well as the types of the Gnathostomata class Chondrichthyes with the orders Chimaeriformes, Squaliformes, Squatiniformes, Orectolobiformes, Lamniformes, Carcharhiniformes, Torpediniformes, Rajiformes and Myliobatiformes. Some remarks about the history and special problems of the research activities on this groups in the 19th century in Berlin (connected with the names of J. MULLER and F. G. J. HENLE as well as some others) are given in a short introduction.

  • Kritischer Katalog der Typen der Fischsammlung des Zoologischen Museums Berlin. Teil 3: Notothenioidei, Callionymoidei
    Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologisches Museum und Institut für Spezielle Zoologie (Berlin), 2008
    Co-Authors: Ronald Fricke, Hans-joachim Paepke

    Abstract:

    Critical Catalogue of the Types of the Fish Collection of the Zoological Museum Berlin. Part 3: Notothenioidei, Callionymoidei.

    This paper is the third part of the catalogue of Agnatha and fishes stored at the Zoological Museum of the Humboldt University in Berlin. It includes the types of the families Nototheniidae, Bathydraconidae, Channichthyidae and Callionymidae. Methods are the same as in parts 1 and 2 of the catalogue.

  • Kritischer Katalog der Typen der Fischsammlung des Zoologischen Museums Berlin Teil 4: Scorpaeniformes
    Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologisches Museum und Institut für Spezielle Zoologie (Berlin), 2008
    Co-Authors: Hans-joachim Paepke, Ronald Fricke

    Abstract:

    Critical Catalogue of the Types of the Fish Collection of the Zoological Museum Berlin. Part 4: Scorpaeniformes.

    This paper is the fourth part of the catalogue of Agnatha and Fishes stored at the Zoological Museum of the Humboldt University in Berlin. It includes the types of the families Scorpaenidae, Aploactinidae, Congiopodidae, Triglidae, Platycephalidae, Hoplichthyidae, Anoplopomatidae, Hexagrammidae, Cottidae, Cottocomephoridae, Psychrolutidae, Agonidae, and Cyclopteridae. Methods are the same as in parts 1 to 3 of the catalogue.

Kazuyoshi Tsutsui – One of the best experts on this subject based on the ideXlab platform.

  • immunohistochemical detection of prolactin releasing peptide2 in the brain of the inshore hagfish eptatretus burgeri
    General and Comparative Endocrinology, 2019
    Co-Authors: Masafumi Amano, Noriko Amiya, Naoyuki Yamamoto, Tomohiro Osugi, Kazuyoshi Tsutsui

    Abstract:

    Abstract Prolactin-releasing peptide2 (PrRP2) belongs to the RFamide peptide group and is a paralog of prolactin-releasing peptide (PrRP). Recent studies demonstrated that PrRP2, but not PrRP, regulates prolactin release in teleosts. The evolutionary origin of PrRP and PrRP2 dates back to at least early vertebrates because homologs of PrRP/PrRP2 were identified in lampreys, one of the earliest branch of vertebrates class Agnatha. However, PrRP/PrRP2 remains to be identified in hagfish, another representative species of class Agnatha. Here, we examined the distribution of PrRP2 in the brain and pituitary of the inshore hagfish Eptatretus burgeri to obtain further understanding of the neuroendocrine system of PrRP2. PrRP2-immunoreactive (ir) cell bodies were detected in the infundibular nucleus of hypothalamus (HYinf). PrRP2-ir fibers were restricted around PrRP2-ir cell bodies and were not detected in the dorsal wall of the neurohypophysis compared to the abundant PrRP2-ir fiber distribution in the brain and innervation to the pituitary in other vertebrates. To examine possible reciprocal connections of PrRP2 and other neuropeptides, we further conducted dual-label immunohistochemistry of PrRP2 and the PQRFamide (PQRFa) peptide or corticotropin-releasing hormone (CRH). Reciprocal connections are suggested between PrRP2 and PQRFa neurons as well as between PrRP2 and CRH neurons. The present study demonstrates, for the first time, that PrRP2 is expressed in the brain of inshore hagfish. The restricted distribution of PrRP2-ir fibers in the HYinf suggests that PrRP2 does not directly regulate the pituitary gland, but regulates the function of the HYinf where PQRFa and CRH are expressed.

  • Immunohistochemical detection of prolactin-releasing peptide2 in the brain of the inshore hagfish Eptatretus burgeri.
    General and Comparative Endocrinology, 2018
    Co-Authors: Masafumi Amano, Noriko Amiya, Naoyuki Yamamoto, Tomohiro Osugi, Kazuyoshi Tsutsui

    Abstract:

    Abstract Prolactin-releasing peptide2 (PrRP2) belongs to the RFamide peptide group and is a paralog of prolactin-releasing peptide (PrRP). Recent studies demonstrated that PrRP2, but not PrRP, regulates prolactin release in teleosts. The evolutionary origin of PrRP and PrRP2 dates back to at least early vertebrates because homologs of PrRP/PrRP2 were identified in lampreys, one of the earliest branch of vertebrates class Agnatha. However, PrRP/PrRP2 remains to be identified in hagfish, another representative species of class Agnatha. Here, we examined the distribution of PrRP2 in the brain and pituitary of the inshore hagfish Eptatretus burgeri to obtain further understanding of the neuroendocrine system of PrRP2. PrRP2-immunoreactive (ir) cell bodies were detected in the infundibular nucleus of hypothalamus (HYinf). PrRP2-ir fibers were restricted around PrRP2-ir cell bodies and were not detected in the dorsal wall of the neurohypophysis compared to the abundant PrRP2-ir fiber distribution in the brain and innervation to the pituitary in other vertebrates. To examine possible reciprocal connections of PrRP2 and other neuropeptides, we further conducted dual-label immunohistochemistry of PrRP2 and the PQRFamide (PQRFa) peptide or corticotropin-releasing hormone (CRH). Reciprocal connections are suggested between PrRP2 and PQRFa neurons as well as between PrRP2 and CRH neurons. The present study demonstrates, for the first time, that PrRP2 is expressed in the brain of inshore hagfish. The restricted distribution of PrRP2-ir fibers in the HYinf suggests that PrRP2 does not directly regulate the pituitary gland, but regulates the function of the HYinf where PQRFa and CRH are expressed.