发明名称 |
Composition for cryopreservation of cells and tissues |
摘要 |
A composition for cryopreservation of cells and tissues of human and other animals in a safe manner without using toxic substances such as DMSO, as well as for freeze preserving or freeze-drying of foods and pharmaceuticals. In embodiments, ε-poly-L-lysine is reacted with succinic anhydride so that 60% or more of amino groups are blocked; and, thus obtained polymer compound is added to Dulbecco-modified eagle MEM culture medium (DMEM) on market sale to form a cryopreservation liquid. In embodiments for foods or pharmaceuticals, the ε-poly-L-lysine derivative was added by 0.5-10 wt % to curb freeze concentration. |
申请公布号 |
US9603355(B2) |
申请公布日期 |
2017.03.28 |
申请号 |
US201414266236 |
申请日期 |
2014.04.30 |
申请人 |
BIO VERDE INC. |
发明人 |
Matsumura Kazuaki;Sugai Hajime;Hyon Suong-Hyu |
分类号 |
A61K47/34;C12N5/071;A23L3/375;A01N1/02 |
主分类号 |
A61K47/34 |
代理机构 |
United IP Counselors, LLC |
代理人 |
United IP Counselors, LLC |
主权项 |
1. A method for preserving cells or tissues, comprising: suspending or immersing the cells or tissues in a cryopreservative liquid; then, freezing the cryopreservative liquid, as well as the cells or tissues therein; and keeping them for a certain period and subsequently thawing them; wherein
said cryopreservative liquid is an aqueous solution comprising 1-50% by weight relative to the total weight of the cryopreservative liquid of a polyamine polymer compound comprised of a polymer of units having side-chain amino groups, said polymer of units being ε-poly-L-lysine; and 50-99 mol % of the amino groups, other than those forming amino-acid-to-amino-acid linkages, of said polymer compound are blocked with a carboxylic anhydride to form pendant moieties, each of which is linked to the main chain of the polymer via an amide linkage and has a free carboxylic acid group. |
地址 |
Kyoto-Shi, Kyoto JP |