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PubMed1979

Carcinoembryonic antigen (CEA) in patients with malignant and non-malignant diseases.

Serum carcinoembryonic antigen (CEA) concentration was found to be raised in 503 of 550 patients (91%) with bladder cancer, lymphoma of intestine, hepatocellular carcinoma, bronchogenic carcinoma, prostate cancer, cirrhosis of liver and bilharziasis. The degree of elevation was moderate in all patients except in 189 patients in whom values more than 20 ng/ml were recorded, of which 53 patients with bladder cancer and 118 patients with bilharziasis. The mean CEA value in the patients with cirrhosis in the non-tumorous liver was slightly higher than that in those without cirrhosis, but the difference did not reach statistical significance (P greater than 0.01). There was no correlation between serum CEA and alph-fetoprotein (AFP) levels in all patients except in patients with bladder carcinoma, hepatoma and bilharziasis.

Adult↗
PubMed1986

An enzyme immunoassay for auto-antibodies to keratin in normal human serum and in pleural fluids from patients with various malignant or non-malignant lung diseases.

An enzyme-linked immunosorbent assay (ELISA) for anti-keratin antibodies was prepared by coating microplates with epidermal keratin purified from the stratum corneum from human foot. Naturally occurring auto-antibodies bind keratin via their f(ab')2 fragment. They were assayed in the serum from 65 healthy people. The serum titer increased significantly with aging. Auto-antibodies stained all the layers of a normal human epidermis whereas an immune serum, prepared by injecting a rabbit with pure human keratin proteins, stained more efficiently the outer layers of the human skin; pre-immune rabbit serum did not stain human skin at all. The lowest anti-keratin activities were observed in serum from patients with squamous cell lung carcinoma and with mesothelioma. The activity was lower in pleural fluid from patients with pleural mesothelioma than in pleural fluid from other types of cancer. This is possibly due to the fixation of autoantibodies onto the pleural tumor or on cell debris arising from the tumor.

Animals↗
PubMed1986

[The simultaneous occurrence of chronic lymphatic leukemia with malignant tumors and the lymphatic reaction caused by malignant growths].

In 352 patients affected with chronic lymphatic leukemia (CLL) the authors simultaneously detected a solid second tumour 22 times (= 6.22%) (6 cancers of the prostrate, 5 cancers of the skin, 4 cancers of the uterus, 2 cancers of the stomach, 2 cancers of the lung, one case of rectal and mamma cancer each and one case of eye sarcoma). In one third of the cases the two malignomas were simultaneously detected, thus it was excluded that the second tumour was induced by the antimitotic treatment of the primary disease. In seven cases the solid tumour was identified after diagnosing CLL, without any cytostatic therapy having been made here before. In addition, a report is given on a patient showing symptoms of gastric cancer not radically removed and a lymphocytic reaction. Initially, the case was explained as gastric adenocancer with simultaneous CLL because even 5 years after surgical treatment there were 16-20 X 10(6)/l of leukocytes with 64% of lymphocytes in the peripheral blood and 85% of lympho-reticular cells in the bone marrow. Two years later, however, the blood picture was normal and remained to be unchanged further on. Thus, it seems that the healing of the gastric cancer has caused the lymphocytic reaction to have ceased. In addition, it should be noted that in 1974 the patient suffered from an epithelium after a scratch-mark on the nose tip, which was irradiated, however, without eliciting any lymphocytic reaction. The patient is still alive (June 1985).

Aged↗
PubMed1989

[Detection of multidrug resistant cells in human malignant diseases by monoclonal antibodies and strategy to eradicate resistant malignant cells].

Two monoclonal antibodies of F (ab')2 form, MRK 16 and MRK 20 that recognize P-glycoprotein and P85 kD protein respectively, were useful to detect multidrug resistant cells in human lymphoma, leukemia and gastrointestinal cancer cell lines. They were classified into 4 groups: Group I (4 cell lines) was insensitive to vinca alkaloids, anthracyclines, etoposide (VP-16) and actinomycin-D (ACT-D), and reactive to MRK 16 and MRL 20. Group II (2 cell lines) was insensitive to vincristine (VCR), but not reactive to both antibodies. Group III (3 cell lines) was insensitive to anthracyclines and VP-16, but sensitive to vinca alkaloids and ACT-D, and reactive to MRK 20 but not to MRK 16. Group IV (all other cell lines) was sensitive to these drugs, and not reactive to both antibodies. MRK 16 detects P-glycoprotein-associated multidrug resistance (MDR), while MRK 20 detects P 85kd-associated novel MDR. These monoclonal antibodies were useful for detection of MDR cells in clinical samples.

ATP Binding Cassette Transporter, Subfamily B, Mem↗