Effect of Tinospora cordifolia on the antitumor activity of tumor-associated macrophages-derived dendritic cells.
We and others previously have reported that extract prepared from medicinal plant Tinospora cordifolia shows a wide spectrum of immunoaugmentary effects. Tinospora cordifolia was shown to upregulate antitumor activity of tumor-associated macrophages (TAM). In this article we present evidence to show that an alcoholic extract of Tinospora cordifolia (ALTC) enhances the differentiation of TAM to dendritic cells (DC) in response to granulocyte/macrophage-colony-stimulating factor, interleukin-4, and tumor necrosis factor. DC differentiated in vitro from TAM that were harvested from tumor-bearing mice after i.p. administration of ALTC (200 mg/kg body weight) 2 days posttumor transplantation shows an enhanced tumor cytotoxicity and production of tumoricidal soluble molecules like TNF, IL-1, and NO. Adoptive transfer of these TAM-derived DC to Dalton's lymphoma-bearing mice resulted in prolongation of survival of tumor-bearing mice. This is the first report regarding the differentiation and antitumor functions of TAM-derived DC obtained from tumor-bearing host administered with ALTC. The possible mechanisms involved also are discussed.
Singh
Nisha
N
School of Biotechnology, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Singh
Sukh Mahendra
SM
Shrivastava
Pratima
P
D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects / Q000276:immunology; D003713:Dendritic Cells / Q000187:drug effects* / Q000276:immunology / Q000473:pathology; D005260:Female; D007155:Immunologic Factors / Q000494:pharmacology; D007959:Lymphocyte Culture Test, Mixed; D016399:Lymphoma, T-Cell / Q000473:pathology*; D008262:Macrophage Activation / Q000187:drug effects / Q000276:immunology; D008264:Macrophages / Q000187:drug effects* / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology; D018514:Plant Structures; D031610:Tinospora
D000972:Antineoplastic Agents, Phytogenic; D007155:Immunologic Factors; D010936:Plant Extracts