Anti-GFP antibody choices

A variety of anti-GFP antibodies are now provided to fluorescent protein users. In addition to the monoclonal anti-GFP antibody that has been introduced together with the GFP-Trap product group, Allele Biotech also has a strong anti-GFP polyclonal product, and a new rat anti-GFP monoclonal antibody. The availability of these different species specificity should allow users to have options in staining, detection, co-IP, double-labeling, etc.

New Product of the Week 04-05-10 to 04-11-10: Rat anti-AvGFP antibody, ACT-CM-MRGFP10

Promotion of the Week 04-05-10 to 04-11-10: Buy any Allele Biotech/Orbigen’s polyclonal antibody, get another of equal or less value at 60% off (if you are not a fan or friend through Allele’s online social networks, the discount is 30%).

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Launch of Allele-iPS Product Line

Induced pluripotent stem cells, or iPS (or iPSC as some call it), are differentiated cells from adult that “regained” capabilities to differentiate into all 3 germ layer specific cell types. The iPS induction process currently involves using viral vectors to introduce 3 or 4 cDNAs, which seemed surprisingly simple considering how complex it is for stem cells to go through each differentiation pathway.

The potentials of using iPS as models for research, cell assay systems, drug screening, toxicological testing, etc., seem to be tremendous at this point. However, for therapeutic use, the biggest hurdle standing in the way is the tendency of these iPS cells to form tumors once transplanted. It could be due to the oncogenic nature of the stemness inducing cDNAs themselves, or the retrovirus or lentivirus used for bring the cDNAs into the cells. A number of labs like that of Sheng Ding at Scripps, San Diego (Li et al., 2009), and Doug Melton at Harvard (Huangfu et al., 2008a; Huangfu et al., 2008b), are screening chemicals that would replace the use of some or maybe eventually all of the cDNAs. Such advances may help mitigate the oncogenic effects possibly associated with the inducing genes. Using non-integrating vectors as carriers would be preferred method for gene transfer if the retroviral or lentiviral vectors are the cause of tumors from iPS.

Today is the day that Allele launches its iPS product line, officially in this exciting field as one of the very first companies that produce products to make iPS research easier for everybody. New products in the pipeline include those for iPS induction and detection, stem cell culturing, differentiation tracking, and safer, novel delivery methods. It is just the beginning!

Huangfu, D., Maehr, R., Guo, W., Eijkelenboom, A., Snitow, M., Chen, A.E., and Melton, D.A. (2008a). Induction of pluripotent stem cells by defined factors is greatly improved by small-molecule compounds. Nature biotechnology 26, 795-797.
Huangfu, D., Osafune, K., Maehr, R., Guo, W., Eijkelenboom, A., Chen, S., Muhlestein, W., and Melton, D.A. (2008b). Induction of pluripotent stem cells from primary human fibroblasts with only Oct4 and Sox2. Nature biotechnology 26, 1269-1275.
Li, W., Wei, W., Zhu, S., Zhu, J., Shi, Y., Lin, T., Hao, E., Hayek, A., Deng, H., and Ding, S. (2009). Generation of rat and human induced pluripotent stem cells by combining genetic reprogramming and chemical inhibitors. Cell stem cell 4, 16-19.

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Wednesday, March 18th, 2009 iPSCs and other stem cells No Comments