Isolation and characterization of a tumor necrosis factor binding protein from urine

• Tumor necrosis factor (TNF)/cachectin can produce both beneficial and harmful manifestations. Mechanisms may operate to counteract potentially harmful effects such as shock and cachexia. The TNF binding protein (TNF-BP), which is found at increased levels in serum and urine of patients with chronic renal failure, may play such a role. TNF-BP was purified 1,000,000-fold to homogeneity from urine of patients with chronic renal failure by use of ion exchange chromatography, affinity chromatography on TNF-Sepharose and reverse phase chromatography. The purified protein contained only one chain with an apparent Mr on sodium dodecyl sulfate-polyacrylamide gel electrophoresis of 30,000. The aminoterminal amino acid sequence D-S-V-X-P-Q-G-K-Y-I-H-P-Q-V-N-S-I-X-K-T revealed no significant homologies with previously described protein sequences. TNF-BP may act as a regulator of the bioactivities of TNF/cachectin.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Urologi och njurmedicin (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Urology and Nephrology (hsv//eng)

Keyword

Amino Acid Sequence

Carrier Proteins/isolation & purification

Chromatography, Affinity

Chromatography, Ion Exchange

Electrophoresis, Polyacrylamide Gel

Humans

Kidney Failure, Chronic/urine

Molecular Sequence Data

Tumor Necrosis Factor-alpha/metabolism

Publication and Content Type

art (subject category)

ref (subject category)