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Week of July 19, 2009 < Back ¦ 2009 ¦ Home

Hot Paper in Biology

"Induction of pluripotent stem cells from adult human fibroblasts by defined factors," by Kazutoshi Takahashi, Koji Tanabe, Mari Ohnuki, Megumi Narita, Tomoko Ischisaka, Kiichiro Tomoda, and Shinya Yamanaka, Cell, 131(5): 861-72, 30 November 2007.

[Authors' affiliations: Kyoto University, Japan; CREST, Kawaguchi, Japan; Gladstone Institute of Cardiovascular Disease, San Francisco, CA]

Abstract: "Successful reprogramming of differentiated human somatic cells into a pluripotent state would allow creation of patient- and disease-specific stem cells. We previously reported generation of induced pluripotent stem (iPS) cells, capable of germline transmission, from mouse somatic cells by transduction of four defined transcription factors. Here, we demonstrate the generation of iPS cells from adult human dermal fibroblasts with the same four factors: Oct3/4, Sox2, Klf4, and c-Myc. Human iPS cells were similar to human embryonic stem (ES) cells in morphology, proliferation, surface antigens, gene expression, epigenetic status of pluripotent cell-specific genes, and telomerase activity. Furthermore, these cells could differentiate into cell types of the three germ layers in vitro and in teratomas. These findings demonstrate that iPS cells can be generated from adult human fibroblasts."

This 2007 report from Cell was cited 88 times in current journal articles indexed by Clarivate Analytics during March-April 2009. No other biology paper published in the last two years, aside from reviews, collected a higher citation total during that two-month period. After slipping briefly to #2 last time based on citations processed during January-February 2009, the paper now regains the #1 standing. Prior to the most recent two-month count, citations have accrued as follows:

January-February 2009: 76 citations
November-December 2008: 93
September-October 2008: 51
July-August 2008: 96
May-June 2008: 59
March-April 2008: 41
January-February 2008: 23
November-December 2007: 3

Total citations to date: 530

SOURCE: Hot Papers Database (Included with a subscription to the print newsletter Science Watch®, available from the Research Services Group of Thomson Reuters. Packaged on a CD that is mailed with each Science Watch issue, the Hot Papers Database contains data on hundreds of highly cited papers published during the last two years. User interface permits searching by author, organization, journal, field, and more. Total citations, as well as citations accrued during successive bimonthly periods, can be assessed and graphed. An updated CD containing the most recent bimonthly data is mailed with every new issue of Science Watch, six times a year. The CD also includes an electronic version of the Science Watch issue in HTML format, for personal desktop access.

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