Non-viral Induction of Transgene-free iPSCs from Somatic Fibroblasts of Multiple Mammalian Species [dog]
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ABSTRACT: Induced pluripotent stem cells (iPSCs) are capable of providing an unlimited source of cells from all three germ layers as well as germ cells. The derivation and usage of iPSCs from various animal models may facilitate stem-cell-based therapy, generation of gene-modified animals, and evolutionary studies assessing interspecies differences. However, there is a lack of species-wide methods for deriving iPSCs, in particular by means of non-viral and non-transgene-integrating (NTI) approaches. Here, we demonstrated the derivation of iPSCs from somatic fibroblasts of multiple mammalian species from three different taxonomic orders, including the common marmoset (Callithrix jacchus) in Primates, the dog (Canis lupus familiaris) in Carnivora, and the pig (Sus scrofa) in Cetartiodactyla, by combinatorial usage of chemical compounds and NTI episomal vectors. Interestingly, the somatic fibroblasts temporarily acquired a neural stem cell (NSC)-like state during the reprogramming procedure. Collectively, our method, robustly applicable to various species, holds a great potential for facilitating stem-cell-based research using various animals in Mammalia.
Project description:Induced pluripotent stem cells (iPSCs) are capable of providing an unlimited source of cells from all three germ layers as well as germ cells. The derivation and usage of iPSCs from various animal models may facilitate stem-cell-based therapy, generation of gene-modified animals, and evolutionary studies assessing interspecies differences. However, there is a lack of species-wide methods for deriving iPSCs, in particular by means of non-viral and non-transgene-integrating (NTI) approaches. Here, we demonstrated the derivation of iPSCs from somatic fibroblasts of multiple mammalian species from three different taxonomic orders, including the common marmoset (Callithrix jacchus) in Primates, the dog (Canis lupus familiaris) in Carnivora, and the pig (Sus scrofa) in Cetartiodactyla, by combinatorial usage of chemical compounds and NTI episomal vectors. Interestingly, the somatic fibroblasts temporarily acquired a neural stem cell (NSC)-like state during the reprogramming procedure. Collectively, our method, robustly applicable to various species, holds a great potential for facilitating stem-cell-based research using various animals in Mammalia.
Project description:Induced pluripotent stem cells (iPSCs) are capable of providing an unlimited source of cells from all three germ layers as well as germ cells. The derivation and usage of iPSCs from various animal models may facilitate stem-cell-based therapy, generation of gene-modified animals, and evolutionary studies assessing interspecies differences. However, there is a lack of species-wide methods for deriving iPSCs, in particular by means of non-viral and non-transgene-integrating (NTI) approaches. Here, we demonstrated the derivation of iPSCs from somatic fibroblasts of multiple mammalian species from three different taxonomic orders, including the common marmoset (Callithrix jacchus) in Primates, the dog (Canis lupus familiaris) in Carnivora, and the pig (Sus scrofa) in Cetartiodactyla, by combinatorial usage of chemical compounds and NTI episomal vectors. Interestingly, the somatic fibroblasts temporarily acquired a neural stem cell (NSC)-like state during the reprogramming procedure. Collectively, our method, robustly applicable to various species, holds a great potential for facilitating stem-cell-based research using various animals in Mammalia.
Project description:Induced pluripotent stem cells (iPSCs) are capable of providing an unlimited source of cells from all three germ layers as well as germ cells. The derivation and usage of iPSCs from various animal models may facilitate stem-cell-based therapy, generation of gene-modified animals, and evolutionary studies assessing interspecies differences. However, there is a lack of species-wide methods for deriving iPSCs, in particular by means of non-viral and non-transgene-integrating (NTI) approaches. Here, we demonstrated the derivation of iPSCs from somatic fibroblasts of multiple mammalian species from three different taxonomic orders, including the common marmoset (Callithrix jacchus) in Primates, the dog (Canis lupus familiaris) in Carnivora, and the pig (Sus scrofa) in Cetartiodactyla, by combinatorial usage of chemical compounds and NTI episomal vectors. Interestingly, the somatic fibroblasts temporarily acquired a neural stem cell (NSC)-like state during the reprogramming procedure. Collectively, our method, robustly applicable to various species, holds a great potential for facilitating stem-cell-based research using various animals in Mammalia.
Project description:Induced pluripotent stem cells (iPSCs) are capable of providing an unlimited source of cells from all three germ layers as well as germ cells. The derivation and usage of iPSCs from various animal models may facilitate stem-cell-based therapy, generation of gene-modified animals, and evolutionary studies assessing interspecies differences. However, there is a lack of species-wide methods for deriving iPSCs, in particular by means of non-viral and non-transgene-integrating (NTI) approaches. Here, we demonstrated the derivation of iPSCs from somatic fibroblasts of multiple mammalian species from three different taxonomic orders, including the common marmoset (Callithrix jacchus) in Primates, the dog (Canis lupus familiaris) in Carnivora, and the pig (Sus scrofa) in Cetartiodactyla, by combinatorial usage of chemical compounds and NTI episomal vectors. Interestingly, the somatic fibroblasts temporarily acquired a neural stem cell (NSC)-like state during the reprogramming procedure. Collectively, our method, robustly applicable to various species, holds a great potential for facilitating stem-cell-based research using various animals in Mammalia.
Project description:Induced pluripotent stem cells (iPSCs) can be derived from somatic cells by the introduction of the transcription factors Oct4, Sox2, Klf4 and cMyc using various methods. Here, we describe a new approach for the derivation of murine iPSCs using a polycistronic non-viral inducible vector integrated into pseudo attP sites via the C31 integrase-mediated site-specific recombination and subsequent vector excision by Cre recombinase. The pluripotency of the derived iPSCs was proved by in vitro and in vivo tests. The derived transgene-free iPSCs reactivated the endogenous pluripotency genes like e.g. Oct4, Sox2 and Nanog and the global gene expression profiles of iPSCs lines are highly similar to ESCs and distinct from parental murine fibroblasts. We demonstrated the differentiation potential of iPSCs by generation cells of the three germ layers as well as we successfully created germline chimeric mice from transgene-free iPSCs. In this study, we presented an efficient method for the generation of transgene-free iPSCs using dual-recombinase technology. expression data of iPSCs/ESCs/MEFs
Project description:Two phases of pluripotency, naïve and primed, have been captured in vitro and studied in details1. A third formative phase was recently proposed to exist between naïve and primed phases2. Formative pluripotency entails permissiveness for direct primordial germ cell (PGC) induction and competence for blastocyst chimeras, and is characterized by transcriptional and epigenetic features intermediate of naïve and primed pluripotency. To date, however, stable pluripotent stem cells (PSCs) harboring formative features haven’t been derived from early mammalian embryos. Here we develop a method which enabled the derivation and culture of stable formative-like embryonic stem cells (ESCs) from mouse blastocysts. Formative-like mouse ESCs share molecular features characteristic of early post-implantation epiblasts and are competent for PGC-like cell induction and blastocyst chimera formation. The same culture also supported the derivation of ESCs and transgene-free induced pluripotent stem cells (iPSCs) from horse blastocysts and fibroblasts, respectively. Horse ESCs/iPSCs transcriptionally resembled mouse formative cells, and could also be directly induced into PGC-like cells. Formative-like horse iPSCs could efficiently chimerize horse, mouse, goat, sheep and pig embryos. Stable formative-like PSCs will be invaluable for studying mammalian pluripotency, and our method may be broadly applicable for the derivation of PGC and chimera competent PSCs from other mammalian species.
Project description:Two phases of pluripotency, naïve and primed, have been captured in vitro and studied in details1. A third formative phase was recently proposed to exist between naïve and primed phases2. Formative pluripotency entails permissiveness for direct primordial germ cell (PGC) induction and competence for blastocyst chimeras, and is characterized by transcriptional and epigenetic features intermediate of naïve and primed pluripotency. To date, however, stable pluripotent stem cells (PSCs) harboring formative features haven’t been derived from early mammalian embryos. Here we develop a method which enabled the derivation and culture of stable formative-like embryonic stem cells (ESCs) from mouse blastocysts. Formative-like mouse ESCs share molecular features characteristic of early post-implantation epiblasts and are competent for PGC-like cell induction and blastocyst chimera formation. The same culture also supported the derivation of ESCs and transgene-free induced pluripotent stem cells (iPSCs) from horse blastocysts and fibroblasts, respectively. Horse ESCs/iPSCs transcriptionally resembled mouse formative cells, and could also be directly induced into PGC-like cells. Formative-like horse iPSCs could efficiently chimerize horse, mouse, goat, sheep and pig embryos. Stable formative-like PSCs will be invaluable for studying mammalian pluripotency, and our method may be broadly applicable for the derivation of PGC and chimera competent PSCs from other mammalian species.
Project description:We introduce a method for generating transgene-free and high-quality naive human induced pluripotent stem cells (iPSCs) using a modified Sendai virus (SeV) vector reprogramming system. This reprogramming method realizes the derivation of naive iPSCs from various somatic cells accompanied with fast and robust SeV vector removal at early passages. The established naive iPSCs have superior differentiation ability compared with iPSCs derived from conventional methods.
Project description:Induced pluripotent stem cells (iPSCs) can be derived from somatic cells by the introduction of the transcription factors Oct4, Sox2, Klf4 and cMyc using various methods. Here, we describe a new approach for the derivation of murine iPSCs using a polycistronic non-viral inducible vector integrated into pseudo attP sites via the C31 integrase-mediated site-specific recombination and subsequent vector excision by Cre recombinase. The pluripotency of the derived iPSCs was proved by in vitro and in vivo tests. The derived transgene-free iPSCs reactivated the endogenous pluripotency genes like e.g. Oct4, Sox2 and Nanog and the global gene expression profiles of iPSCs lines are highly similar to ESCs and distinct from parental murine fibroblasts. We demonstrated the differentiation potential of iPSCs by generation cells of the three germ layers as well as we successfully created germline chimeric mice from transgene-free iPSCs. In this study, we presented an efficient method for the generation of transgene-free iPSCs using dual-recombinase technology.
Project description:We introduce a method for generating transgene-free and high-quality naive human induced pluripotent stem cells (iPSCs) using a modified Sendai virus (SeV) vector reprogramming system. This reprogramming method realizes the derivation of naive iPSCs from various somatic cells accompanied with fast and robust SeV vector removal at early passages. The established naive iPSCs have superior naive-specific differentiation ability compared with iPSCs derived from conventional methods.