Construction and expression of retroviruses encoding dual drug resistance genes in human umbilical cord blood CD34+ cells
摘要:
A series of retroviral vectors encoding human mdr1 gene alone as well as in combination with either human mgmt gene or human mutant Ser(31)-dhfr gene are engineered. The resultant retroviruses are used to transduce human umbilical cord blood CD34(+) cells. It has been shown that expression of dual drug resistance genes in transduced cells confers a broad range of resistance to both kinds of corresponding drugs. These data suggest a rationale for the use of such double chemoresistance gene constructs in an in vivo model in which transduced hematopoietic cells will acquire multiple protection against the cytotoxic side effects of combination chemotherapy and may have future application in chemoprotection of normal tissues, thus killing tumor cells more effectively.
The invention provides epoxy and oxetane compositions including the novel acyloxy and N-acyl curing agents described herein. Use of invention curing agents result in cured adhesive compositions with remarkably increased adhesion and reduced hydrophilicity when compared to resins cured with other types of curing agents. Furthermore, the curatives of this invention do not interfere with free-radical cure and are thus suited for use in hybrid cure thermoset compositions.
The invention provides epoxy and oxetane compositions including the novel acyloxy and N-acyl curing agents described herein. Use of invention curing agents result in cured adhesive compositions with remarkably increased adhesion and reduced hydrophilicity when compared to resins cured with other types of curing agents. Furthermore, the curatives of this invention do not interfere with free-radical cure and are thus suited for use in hybrid cure thermoset compositions.
The invention provides epoxy and oxetane compositions including the novel acyloxy and N-acyl curing agents described herein. Use of invention curing agents result in cured adhesive compositions with remarkably increased adhesion and reduced hydrophilicity when compared to resins cured with other types of curing agents. Furthermore, the curatives of this invention do not interfere with free-radical cure and are thus suited for use in hybrid cure thermoset compositions.
Construction and expression of retroviruses encoding dual drug resistance genes in human umbilical cord blood CD34+ cells
作者:Jun Yang、Ying Wu、Ping Ma、Yanhua Zhao、Ying You、Susan E. Kane、Ning Mao、Yangpei Zhang
DOI:10.1007/bf02886244
日期:2000.8
A series of retroviral vectors encoding human mdr1 gene alone as well as in combination with either human mgmt gene or human mutant Ser(31)-dhfr gene are engineered. The resultant retroviruses are used to transduce human umbilical cord blood CD34(+) cells. It has been shown that expression of dual drug resistance genes in transduced cells confers a broad range of resistance to both kinds of corresponding drugs. These data suggest a rationale for the use of such double chemoresistance gene constructs in an in vivo model in which transduced hematopoietic cells will acquire multiple protection against the cytotoxic side effects of combination chemotherapy and may have future application in chemoprotection of normal tissues, thus killing tumor cells more effectively.