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Circulating high molecular weight IgG fibronectin complexes in myeloproliferative disorders
T P Baglin1, S M Price, B J Boughton
1Department of Haematology, Queen Elizabeth Medical Centre, Edgbaston, Birmingham.
Journal of Clinical Pathology
|February 1, 1990
Summary
Patients with myeloproliferative diseases show abnormal high molecular weight IgG complexes. These findings implicate IgG fibronectin complex formation as a key feature in these blood disorders.
Area of Science:
- Hematology
- Immunology
- Biochemistry
Background:
- Myeloproliferative diseases are a group of blood cancers characterized by the overproduction of myeloid cells.
- Abnormal protein complexes in plasma can be indicative of underlying disease pathology.
Purpose of the Study:
- To investigate the presence and nature of high molecular weight complexes in the plasma of patients with myeloproliferative diseases.
- To determine if immunoglobulin G (IgG) and fibronectin form complexes in these patients.
Main Methods:
- Polyethylene glycol (PEG) precipitation was used to isolate protein complexes.
- Analytical ultracentrifugation was employed to assess molecular weight and complex formation.
- Immunoaffinity chromatography was utilized to specifically detect IgG and fibronectin interactions.
Main Results:
- All patients with myeloproliferative diseases exhibited abnormal high molecular weight material in their plasma.
- This material was precipitated by PEG and confirmed to contain high molecular weight IgG using exclusion chromatography.
- Immunoaffinity chromatography provided evidence for the formation of IgG-fibronectin complexes.
Conclusions:
- Abnormal high molecular weight IgG complexes are a significant characteristic of myeloproliferative disorders.
- The formation of IgG-fibronectin complexes is implicated in the pathogenesis of these diseases.