Biochemical and Histological Analysis of Bone Marrow Collagen in Myelofibrosis

Summary. Total protein, collagen (hydroxyproline) and glycoproteins (hexosamine) content of control and myelofibrosis (MF) bone marrow samples was determined using a sequential extraction procedure. MF marrow extracts contained higher amounts of collagen than control extracts. The collagen content appeared to increase with the duration of the disease. In more recent MF cases (<2 years) at least 60% of the total collagen was extracted in 0.5 m NaCl. this proportion decreases to 33% in older cases (> 4 years), indicating a progressive insolubilization (crosslinking) of collagen.

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