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Tytuł oryginału: PEPCK mRNA localization in proximal tubule and gene regulation during metabolic acidosis.
Autorzy: Drewnowska K. D., Craig M. R., Digiovanni S. R., McCarty J. M., Moorman A. F. M., Lamers W. H., Schoolwerth A. C.
Źródło: J. Physiol. Pharmacol. 2002: 53 (1) s.3-20, il., bibliogr. 33 poz.
Sygnatura GBL: 302,092

Hasła klasyfikacyjne GBL:
  • genetyka
  • nefrologia

    Typ dokumentu:
  • praca doświadczalna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • szczury
  • płeć męska

    Streszczenie angielskie: To identify the nephron segments expressing PEPCK in control and acidotic conditions, PEPCK mRNA was localized in rat kidney using the technique of reserve transcription and polymerase chain reaction (RT-PCR) in individual microdissected S1, S2, and S3 segments of the rat proximal tubule. In controls, the number of tubules expressing PEPCK mRNA was greatest in the S3 segment, moderate in the S2 segment, and least in the S1 segment of the proximal tubule. After NH4Cl feeding, strong signals for PEPCK mRNA were detected in all three proximal tubule segments. In situ hybridization demonstrated expression of PEPCK mRNA only in the medullary rays in controls. After NH4Cl, PEPCK mRNA was expressed throughout the cortex, confirmning the RT-PCR results. These data demonstrate the ability of the rat kidney cortex to modulate the expression of PEPCK mRNA during metabolic acidosis by recruitment of additional cells in the proximal nephrons. Studies with cultured LLC-PK1-F+ cells indicated that increased PEPCK gene transcription at acid pH required a cis-acting element (enhancer) in the more distal 5' flanking region of the promoter.

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