The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Induction of cancer cell-specific apoptosis by folate-labeled cationic liposomes.

We have previously reported that cationic liposomes themselves can induce apoptosis in macrophages and lymphocytes. In this paper, we attempted the cancer cell-specific delivery of cationic liposomes and the induction of apoptosis utilizing this characteristic. Cationic liposomes composed of stearylamine (SA-liposomes) induced apoptosis in human nasopharyngeal epidermoid carcinoma cells (KB cells) overexpressing the folate receptor and human fibroblasts (WI-38 cells) with no folate receptor, without showing selectivity. To recruit liposomes to cancer cells and induce apoptosis, we focused on the folate receptor and prepared folic acid-labeled liposomes using polyethyleneglycol (PEG) (folate-PEG-liposomes). Folate-PEG-liposomes showed selectivity and induced apoptosis in KB cells, but not WI-38 cells. The apoptosis occurred in a dose-dependent manner. Furthermore, folate-PEG-liposomes appear to associate with KB cells via the folate receptor, whereas SA-liposomes may associate with cells through electrostatic interactions. To confirm the contribution of the folate receptor to apoptosis of KB cells induced by folate-PEG-liposomes, the effect of folic acid on the apoptosis was examined. The addition of free folic acid drastically suppressed the apoptosis of KB cells and the percentage of cells with hypodiploid nuclei returned to the control level. Taken together, cationic liposomes labeled with folate bound to KB cells via folate receptors and, interestingly, the cationic liposomes themselves could cause apoptosis in cancer cells.[1]


  1. Induction of cancer cell-specific apoptosis by folate-labeled cationic liposomes. Yoshida, T., Oide, N., Sakamoto, T., Yotsumoto, S., Negishi, Y., Tsuchiya, S., Aramaki, Y. Journal of controlled release : official journal of the Controlled Release Society. (2006) [Pubmed]
WikiGenes - Universities