Biomaterial Database

Erythrocytes from Yoshida ascites sarcoma-bearing rats have reduced surface charge: the effect of tumor products. 1995

V K Pestonjamasp, and N G Mehta

Biological Chemistry Division, Tata Memorial Centre, Parel, Bombay, India.

Erythrocytes from the circulation of rats bearing intraperitoneal Yoshida ascites sarcoma, as well as the red cells contaminating the tumor fluid, exhibit higher concanavalin A (Con A)-mediated agglutination than the cells from normal animals. Two proteins have been purified earlier from the ascites fluid that can impart high agglutinability on the cells in vitro. We report here that the erythrocytes from the tumor-bearing rats exhibit reduced electrophoretic mobility compared to the cells from normal animals (P < 0.001), which correlates with the increase in their Con A-agglutinability (r = 0.998). The two purified proteins also cause reduction in the electrophoretic mobility of erythrocytes (P < 0.01). Thus the modification of the host cell surface observed in tumor-bearing rats arises due to non-specific binding of tumor products that reduce the host cell surface charge.

UI	MeSH Term	Description	Entries
D003208	Concanavalin A	A MANNOSE/GLUCOSE binding lectin isolated from the jack bean (Canavalia ensiformis). It is a potent mitogen used to stimulate cell proliferation in lymphocytes, primarily T-lymphocyte, cultures.
D004594	Electrophysiology	The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.
D004903	Erythrocyte Aggregation	The formation of clumps of RED BLOOD CELLS under low or non-flow conditions, resulting from the attraction forces between the red blood cells. The cells adhere to each other in rouleaux aggregates. Slight mechanical force, such as occurs in the circulation, is enough to disperse these aggregates. Stronger or weaker than normal aggregation may result from a variety of effects in the ERYTHROCYTE MEMBRANE or in BLOOD PLASMA. The degree of aggregation is affected by ERYTHROCYTE DEFORMABILITY, erythrocyte membrane sialylation, masking of negative surface charge by plasma proteins, etc. BLOOD VISCOSITY and the ERYTHROCYTE SEDIMENTATION RATE are affected by the amount of erythrocyte aggregation and are parameters used to measure the aggregation.	Erythrocyte Aggregation, Intravascular,Agglutination, Intravascular,Intravascular Agglutination,Intravascular Erythrocyte Aggregation,Rouleaux Formation, Erythrocyte,Agglutinations, Intravascular,Aggregation, Erythrocyte,Aggregation, Intravascular Erythrocyte,Aggregations, Erythrocyte,Aggregations, Intravascular Erythrocyte,Erythrocyte Aggregations,Erythrocyte Aggregations, Intravascular,Erythrocyte Rouleaux Formation,Erythrocyte Rouleaux Formations,Formation, Erythrocyte Rouleaux,Formations, Erythrocyte Rouleaux,Intravascular Agglutinations,Intravascular Erythrocyte Aggregations,Rouleaux Formations, Erythrocyte
D004912	Erythrocytes	Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.	Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012517	Sarcoma, Yoshida	An experimental sarcoma of rats.	Reticulum Cell-Like Sarcoma, Yoshida,Reticulum Cell Like Sarcoma, Yoshida,Yoshida Sarcoma
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus