Radioimmunoassay of human Hageman factor (factor XII). [/sup 125/I tracer technique]

Journal Article · Wed Sep 01 00:00:00 EDT 1976 · J. Lab. Clin. Med.; (United States)

OSTI ID:7147959

Saito, H; Ratnoff, O D; Pensky, J

A specific, sensitive, and reproducible radioimmunoassay for human Hageman factor (HF, factor XII) has been developed with purified human HF and monospecific rabbit antibody. Precise measurements of HF antigen were possible for concentrations as low as 0.1 percent of that in normal pooled plasma. A good correlation (correlation coefficient = 0.82) existed between the titers of HF measured by clot-promoting assays and radioimmunoassays among 42 normal adults. Confirming earlier studies, HF antigen was absent in Hageman trait plasma, but other congenital deficient plasmas, including those of individuals with Fletcher trait and Fitzgerald trait, contained normal amounts of HF antigen. HF antigen was reduced in the plasmas of patients with disseminated intravascular coagulation or advanced liver cirrhosis, but it was normal in those of patients with chronic renal failure or patients under treatment with warfarin. HF antigen was detected by this assay in plasmas of primates, but not detectable in plasmas of 11 nonprimate mammalian and one avian species.

• Research Organization: Case Western Reserve Univ., Cleveland
• OSTI ID: 7147959
• Journal Information: J. Lab. Clin. Med.; (United States), Vol. 88:3
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
ANTIGENS
RADIOIMMUNOASSAY
PROTEINS
BLOOD PLASMA
IODINE 125
TRACER TECHNIQUES
BETA DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BLOOD
BODY FLUIDS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
RADIOASSAY
RADIOISOTOPES
550601* - Medicine- Unsealed Radionuclides in Diagnostics