THE FURTHER STUDY ON BIOLOGICAL BEHAVIOR OF COLORECTAL ADENOCARCINOMA:THE EXTRACELLULAR PROTEOGLYCAN DEGRADED BY ARYLSULFATASE B

The fresh tissues were obtained from 64 colorectal adenocarcinoma (43 well-differentiated and moderately-differentiated adenocarcinoma, 12 poorly- differentiated adenocarcinoma and 9 mutinous cell carcinoma including signet ring cell carcinoma) during surgical operation. The resected edge of each specimen was used for control group. The arylsulfatase B was studied by histochentical staining in different types of colorectal adenocarcinoma, among which 19 cases were investigated by electronhistochemical staining so as to observe the Ruthenium Red granules alteration which represented the extracellular proteoglycan changes and ultrastructure of cancer cells.The results showed that the mutinous cell carcinoma was of the most Intensive arylsulfatase B activity and has a lot of secretory granules with various electron densities in the cytoplasm. The Ruthenium Red granules close to the cancer cell disappeared, a part of remainders changed into the lowered electron density and indistinct shape. In contrast, the

The further study on biological behavior of colorectal adenocarcinoma: The extracellular proteoglycan degraded by arylsulfatase B

The fresh tissues were obtained from 64 colorectal adenocarcinoma (43 well-differentiated and moderately-differentiated adenocarcinoma, 12 poorly- differentiated adenocarcinoma and 9 mutinous cell carcinoma including signet ring cell carcinoma) during surgical operation. The resected edge of each specimen was used for control group. The arylsulfatase B was studied by histochentical staining in different types of colorectal adenocarcinoma, among which 19 cases were investigated by electronhistochemical staining so as to observe the Ruthenium Red granules alteration which represented the extracellular proteoglycan changes and ultrastructure of cancer cells.The results showed that the mutinous cell carcinoma was of the most Intensive arylsulfatase B activity and has a lot of secretory granules with various electron densities in the cytoplasm. The Ruthenium Red granules close to the cancer cell disappeared, a part of remainders changed into the lowered electron density and indistinct shape. In contrast, the other types adenocarcinoma revealed less enzyme activity and a fewer secretory granules. The Ruthenium Red granules near the cancer nest showed that their electron density and size were identical with those of the control group. All of these mentioned above indicate that mucinouscell carcinoma may release hydrolase into pericancerous matrix to degrade the proteoglycans. In view of the network structure formed by proteoglycan in the connective tissue, network has ability to hinder the cancer cell spreading. Because the arylsulfatase B is able to degrade the dermatan sulfate proteoglycan which is component of proteoglycans in the extracellular matrix of human colon. We consider that the arylsulfatase B may lead to destruction of the network barriers in the connective tissue in favour of cancer cell invasion. So the mucinous cell carcinoma is more malignant than those of other colorectal adenocarcinoma.