PURPOSE: The objective of this study was to determine whether cells from the conjunctiva could be reprogrammed into induced pluripotent stem (iPS) cells, providing an alternative source of stem cells. METHODS: We employed a doxycycline-induced reprogrammable mouse strain to generate iPS cells from conjunctiva. The identity of the stem cells was confirmed by reverse transcription polymerase chain reaction (RT-PCR) and immunofluorescence assays. Immunocytochemistry and teratoma assays are established means for scoring stem cell pluripotency. The reprogramming efficiencies of conjunctival cells and ear fibroblasts were compared. RESULTS: We confirmed the identity of the stem cells and demonstrated expression of pluripotency markers (OCT4, SOX2, NANOG, and SSEA1), as tested by RT-PCR and immunofluorescence assays. In addition, derived iPS cells differentiated successfully into embryoid bodies, and showed teratoma formation when injected into immunodeficient mice. Reprogramming conjunctival tissue is as efficient as reprogramming ear fibroblasts. Conjunctiva-iPS exhibited classic features of embryonic stem (ES) cells with respect to morphology, expression of surface antigens, and pluripotency-associated transcription factors, capacity to differentiate in vitro, and the ability to form all three germ layers in vivo. CONCLUSION: The present study demonstrated that conjunctival cells, which are readily obtained during the course of many routine conjunctival biopsies and ophthalmic procedures, can be another reliable source of iPS cells.
PURPOSE: The objective of this study was to determine whether cells from the conjunctiva could be reprogrammed into induced pluripotent stem (iPS) cells, providing an alternative source of stem cells. METHODS: We employed a doxycycline-induced reprogrammable mouse strain to generate iPS cells from conjunctiva. The identity of the stem cells was confirmed by reverse transcription polymerase chain reaction (RT-PCR) and immunofluorescence assays. Immunocytochemistry and teratoma assays are established means for scoring stem cell pluripotency. The reprogramming efficiencies of conjunctival cells and ear fibroblasts were compared. RESULTS: We confirmed the identity of the stem cells and demonstrated expression of pluripotency markers (OCT4, SOX2, NANOG, and SSEA1), as tested by RT-PCR and immunofluorescence assays. In addition, derived iPS cells differentiated successfully into embryoid bodies, and showed teratoma formation when injected into immunodeficientmice. Reprogramming conjunctival tissue is as efficient as reprogramming ear fibroblasts. Conjunctiva-iPS exhibited classic features of embryonic stem (ES) cells with respect to morphology, expression of surface antigens, and pluripotency-associated transcription factors, capacity to differentiate in vitro, and the ability to form all three germ layers in vivo. CONCLUSION: The present study demonstrated that conjunctival cells, which are readily obtained during the course of many routine conjunctival biopsies and ophthalmic procedures, can be another reliable source of iPS cells.
Authors: Nimet Maherali; Rupa Sridharan; Wei Xie; Jochen Utikal; Sarah Eminli; Katrin Arnold; Matthias Stadtfeld; Robin Yachechko; Jason Tchieu; Rudolf Jaenisch; Kathrin Plath; Konrad Hochedlinger Journal: Cell Stem Cell Date: 2007-06-07 Impact factor: 24.633
Authors: Silke Schmidt; Michael A Hauser; William K Scott; Eric A Postel; Anita Agarwal; Paul Gallins; Frank Wong; Yu Sarah Chen; Kylee Spencer; Nathalie Schnetz-Boutaud; Jonathan L Haines; Margaret A Pericak-Vance Journal: Am J Hum Genet Date: 2006-03-20 Impact factor: 11.025
Authors: Yao Li; Yi-Ting Tsai; Chun-Wei Hsu; Deniz Erol; Jin Yang; Wen-Hsuan Wu; Richard J Davis; Dieter Egli; Stephen H Tsang Journal: Mol Med Date: 2012-12-06 Impact factor: 6.354
Authors: J A Thomson; J Itskovitz-Eldor; S S Shapiro; M A Waknitz; J J Swiergiel; V S Marshall; J M Jones Journal: Science Date: 1998-11-06 Impact factor: 47.728
Authors: Zhouhui Geng; Patrick J Walsh; Vincent Truong; Caitlin Hill; Mara Ebeling; Rebecca J Kapphahn; Sandra R Montezuma; Ching Yuan; Heidi Roehrich; Deborah A Ferrington; James R Dutton Journal: PLoS One Date: 2017-03-10 Impact factor: 3.240