Expression of RhCG, a New Putative NH3/NH4+ Transporter, along the Rat Nephron
| Autor: | Jean-Pierre Cartron, Alain Doucet, Dominique Eladari, Fabienne Quentin, Lydie Cheval, I Mouro, Olivier F. Bertrand, Régine Chambrey, Michel Paillard, Baya Cherif-Zahar |
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| Přispěvatelé: | Physiologie et pharmacologie vasculaire et rénale, IFR58-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Processus mentaux et activation cérébrale, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-IFR19-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de recherche Croissance et signalisation (UMR_S 845), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Protéines de la membrane érythrocytaire et homologues non-érythroides, Université des Antilles et de la Guyane (UAG)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de physiologie, explorations fonctionnelles et radioisotopes [CHU HEGP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO), Paris-Centre de Recherche Cardiovasculaire (PARCC - UMR-S U970), Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM) |
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Male
[SDV]Life Sciences [q-bio] MESH: Membrane Glycoproteins Nephron MESH: Rats Sprague-Dawley 030204 cardiovascular system & hematology Kidney Cell membrane Rats Sprague-Dawley MESH: Quaternary Ammonium Compounds 0302 clinical medicine MESH: Animals MESH: Ammonia 0303 health sciences Membrane Glycoproteins biology MESH: Immunoblotting General Medicine medicine.anatomical_structure Nephrology RHAG medicine.medical_specialty Kidney Cortex MESH: Rats Immunoblotting MESH: Carrier Proteins 03 medical and health sciences Ammonia Internal medicine medicine Animals Intercalated Cell RNA Messenger Ammonia transporter MESH: Nephrons 030304 developmental biology MESH: RNA Messenger Cell Membrane Nephrons MESH: Kidney Apical membrane Molecular biology MESH: Male Rats Quaternary Ammonium Compounds MESH: Kidney Cortex Endocrinology RHCG biology.protein Immunologic Techniques MESH: Immunologic Techniques Carrier Proteins MESH: Cell Membrane |
| Zdroj: | Journal of the American Society of Nephrology Journal of the American Society of Nephrology, American Society of Nephrology, 2002, 13 (8), pp.1999-2008. ⟨10.1097/01.asn.0000025280.02386.9d⟩ Journal of the American Society of Nephrology, 2002, 13 (8), pp.1999-2008. ⟨10.1097/01.asn.0000025280.02386.9d⟩ |
| ISSN: | 1046-6673 1533-3450 |
| Popis: | International audience; Two non-erythroid members of the erythrocyte Rhesus (Rh) protein family, RhBG and RhCG, have been recently cloned in the kidney. These proteins share homologies with specific NH(3)/NH(4)(+) transporters (Mep/Amt) in primitive organisms and plants. When expressed in a Mep-deficient yeast, RhCG can function as a bidirectional NH(3)/NH(4)(+) transporter. The aim of this study was to determine the intrarenal and intracellular location of RhCG in rat kidney. RT-PCR on microdissected rat nephron segments demonstrated expression of mRNAs encoding RhCG in distal convoluted tubules, connecting ducts, and cortical and outer medullary collecting ducts but not in proximal tubules and thick ascending limbs of Henle's loop. Immunolocalization studies performed on rat kidney sections with rabbit anti-human RhCG 31 to 48 antibody showed labeling of the apical pole of tubular cells within the cortex, the outer medulla, and the upper portion of the inner medulla. All cells within connecting tubules had identical apical staining. In cortical collecting ducts, a subpopulation of cells that has either apical staining (alpha-intercalated cells) or diffuse staining (beta-intercalated cells) for the beta1 subunit of the H(+)-ATPase, was heavily stained at their apical pole with the RhCG antibody while principal cells identified as H(+)-ATPase negative cells showed a faint apical staining for RhCG that was much less intense than in adjacent intercalated cells. In the outer medulla and the upper portion of the inner medulla, RhCG labeling was restricted to a subpopulation of cells within the collecting duct that apically express the beta1 subunit of the H(+)-ATPase, indicating that RhCG expression in medullary collecting ducts is restricted to intercalated cells. No labeling was seen in glomeruli, proximal tubules, and limbs of Henle's loop. Immunoblotting of apical membrane fractions from rat kidney cortex with the rabbit anti-human RhCG 31 to 48 antibody revealed a doublet band at approximatively 65 kD. |
| Databáze: | OpenAIRE |
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