Atrial natriuretic polypeptide-like material in rat lung

Conference · Wed Mar 05 00:00:00 EST 1986 · Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States)

OSTI ID:7189439

Chang, J K; Chang, D; Xie, C W; Song, D L; Li, X R; Zhang, S X; Wang, T L; Tang, J

Atrial natriuretic polypeptide-like immunoreactive material (ANP-IR) was found in rat lung by radioimmunoassay, with the concentration ranging from 0.6-1.2 pmol/g of tissue in each lobe. PAP-immunohistochemical study demonstrated that specific staining of granules for ..cap alpha..-human ANP are mainly located in the muscular layer of the pulmonary vein. Fractionation of lung extract by gel filtration and reserve phase HPLC revealed the presence of multiple forms of ANP-IR, which possibly possessed molecular structure partially different from rat ANP, atriopeptin I and III. Intravenous injection of lung extract induced potent diuresis and natriuresis in rats. These responses could be abolished when the lung extract was preincubated with antiserum for ..cap alpha..-human ANP. Specific binding sites for /sup 125/I-labeled rat ANP were also found in lung membrane preparation by radioreceptor assay. Incubation of synthetic atriopeptin III (10/sup -9/ to 10/sup -6/M) with lung tissue induced 1-28 fold increase in lung cGMP content. The results suggest that ANP-IR and its receptors existing in rat lung may be involved in the regulation of pulmonary function and have a synergic effect with ANP of cardiac origin in the control of water-electrolytes balance.

• Research Organization: Peninsula Labs., Inc., Belmont, CA
• OSTI ID: 7189439
• Report Number(s): CONF-8604222-
• Journal Information: Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States), Vol. 45:4; Conference: 70. annual meeting of the Federation of American Society for Experimental Biology, St. Louis, MO, USA, 13 Apr 1986
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
POLYPEPTIDES
RADIOIMMUNOASSAY
RECEPTORS
CELL MEMBRANES
DIURETICS
IMMUNE REACTIONS
IODINE 125
LIQUID COLUMN CHROMATOGRAPHY
LUNGS
MOLECULAR STRUCTURE
RATS
ANIMALS
BETA DECAY RADIOISOTOPES
BODY
CELL CONSTITUENTS
CHROMATOGRAPHY
DAYS LIVING RADIOISOTOPES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
IMMUNOASSAY
IMMUNOLOGY
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MEMBRANE PROTEINS
MEMBRANES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PEPTIDES
PROTEINS
RADIOASSAY
RADIOIMMUNOLOGY
RADIOISOTOPES
RESPIRATORY SYSTEM
RODENTS
SEPARATION PROCESSES
TRACER TECHNIQUES
VERTEBRATES
550201* - Biochemistry- Tracer Techniques