Effect of isologous and autologous insulin antibodies on in vivo bioavailability and metabolic fate of immune-complexed insulin in Lou/M rats

Journal Article · Wed Mar 01 00:00:00 EST 1989 · Diabetes; (United States)

DOI:https://doi.org/10.2337/diab.38.3.343· OSTI ID:6279478

Arquilla, E R; McDougall, B R; Stenger, D P

The in vivo bioavailability, distribution, and metabolic fate of 125I-labeled insulin complexed to isologous and autologous antibodies were studied in inbred Lou/M rats. There was an impaired bioavailability of the 125I-insulin bound to the isologous and autologous antibodies. Very little of the 125I-insulin in these immune complexes could bind to insulin receptors on hepatocytes or renal tubular cells and be degraded, because the amounts of 125I from degraded 125I-insulin in the blood or secreted into the stomach were markedly attenuated in both cases for at least 30 min after injection. There was a simultaneous accumulation of 125I-insulin immune complexes in the liver and the kidneys of Lou/M rats injected with 125I-insulin complexed with isologous antibodies or when insulin-immunized Lou/M rats were injected with 125I-insulin during the same interval. The impaired bioavailability of immune-complexed insulin and altered distribution of radioactivity due to the accumulation of immune complexes in the liver and kidney were also observed in previous experiments in which Lewis rats were injected with xenogenic guinea pig and homologous insulin antibodies. These observations are therefore submitted as evidence that the Lou/M rat is a valid model in which to study the bioavailability of insulin immune complexed to isologous, homologous, and xenogenic antibodies and the metabolic fate of the respective insulin-antibody immune complexes.

• Research Organization: Univ. of California, Irvine (USA)
• OSTI ID: 6279478
• Journal Information: Diabetes; (United States), Vol. 38:3
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
INSULIN
METABOLISM
ANTIBODIES
BIOLOGICAL AVAILABILITY
BIOLOGICAL MODELS
GUINEA PIGS
IODINE 125
KIDNEYS
LIVER CELLS
RATS
RECEPTORS
STOMACH
TRACER TECHNIQUES
ANIMAL CELLS
ANIMALS
BETA DECAY RADIOISOTOPES
BODY
DAYS LIVING RADIOISOTOPES
DIGESTIVE SYSTEM
ELECTRON CAPTURE RADIOISOTOPES
GASTROINTESTINAL TRACT
HORMONES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MEMBRANE PROTEINS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANS
PEPTIDE HORMONES
PROTEINS
RADIOISOTOPES
RODENTS
SOMATIC CELLS
VERTEBRATES
550501* - Metabolism- Tracer Techniques