Human chorionic gonadotropin and alpha chain of glycoprotein hormones in patients with inflammatory bowel disease

Abstract. In twenty patients with Crohn's disease and ten patients with ulcerative colitis serum levels of human chorionic gonadotropin and the common alpha‐subunit of glycoprotein hormones were determined by radioimmunoassay. In contrast to published data, all serum samples except one revealed levels within the normal range of 148 controls (human chorionic gonadotropin levels up to 3.9 μU/l, alpha‐subunit up to 3.8 μg/l). Neither the serum levels of human chorionic gonadotropin nor of the alpha‐subunit differed significantly between patients with Crohn's disease (median/maximum: 0.9/4.4 IU/l; 0.7/3.6 μg/l) and ulcerative colitis (1.0/3.4 IU/l; 0.8/2.2 μg/l). Furthermore, the serum levels studied in patients with active (0.9/3.0 IU/l; 0.7/3.5 μg/l) and inactive (0.9/4.4 IU/l; 0.8/3.6 μg/l) Crohn's disease and in patients with active (1.1/3.4 IU/l; 0.9/2.2 μg/l) and inactive (0.9/2.9 IU/l; 0.8/1.3 μg/l) ulcerative colitis were not significantly different. There was no relationship of the duration of the disease or a bowel resection to the serum levels of human chorionic gonadotropin or the alpha‐subunit. It is concluded that both parameters are not useful as markers in patients with Crohn's disease or ulcerative colitis. The normal serum levels found in patients with inflammatory bowel diseases indicate human chorionic gonadotropin as a highly specific marker for malignant diseases.

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