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iPSC Preparation and Epigenetic Memory: Does the Tissue Origin Matter? Cells 2021; 10:cells10061470. [PMID: 34208270 PMCID: PMC8230744 DOI: 10.3390/cells10061470] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/06/2021] [Accepted: 06/10/2021] [Indexed: 02/07/2023] Open
Abstract
The production of induced pluripotent stem cells (iPSCs) represent a breakthrough in regenerative medicine, providing new opportunities for understanding basic molecular mechanisms of human development and molecular aspects of degenerative diseases. In contrast to human embryonic stem cells (ESCs), iPSCs do not raise any ethical concerns regarding the onset of human personhood. Still, they present some technical issues related to immune rejection after transplantation and potential tumorigenicity, indicating that more steps forward must be completed to use iPSCs as a viable tool for in vivo tissue regeneration. On the other hand, cell source origin may be pivotal to iPSC generation since residual epigenetic memory could influence the iPSC phenotype and transplantation outcome. In this paper, we first review the impact of reprogramming methods and the choice of the tissue of origin on the epigenetic memory of the iPSCs or their differentiated cells. Next, we describe the importance of induction methods to determine the reprogramming efficiency and avoid integration in the host genome that could alter gene expression. Finally, we compare the significance of the tissue of origin and the inter-individual genetic variation modification that has been lightly evaluated so far, but which significantly impacts reprogramming.
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Cai Y, Lei X, Chen Z, Mo Z. The roles of cirRNA in the development of germ cells. Acta Histochem 2020; 122:151506. [PMID: 32008790 DOI: 10.1016/j.acthis.2020.151506] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/27/2019] [Accepted: 01/02/2020] [Indexed: 12/12/2022]
Abstract
Circular RNA (CircRNA), a type of endogenous non-coding RNAs (ncRNAs), is generally generated from precursor mRNA (pre-mRNA) by canonical splicing and head-to-tail back splicing. The structure without a polyA tail renders circRNA highly insensitive to ribonuclease. Simultaneously, the distribution of circRNAs is tissue and developmental stage-specific. There are five potential biological functions of circRNAs: 1) promote transcription of their parental genes; 2) function as a miRNA sponge; 3) RNA binding protein (RBP) sponge; 4) encode protein; 5) act as an mRNA trap. Recently, circRNA has attracted attention because studies have shown that circRNAs are associated with follicular development, ovarian senescence, spermatogenesis, and germ cell development process, suggesting that circRNAs may function in germ cells regulation. The investigation of circRNAs in germ cells will provide an excellent opportunity to understand its potential molecular basis, and potentially improving reproduction status in human. In this article, the relationship between circRNA and germ cell development will be discussed.
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Affiliation(s)
- Yaqin Cai
- Clinical Anatomy & Reproductive Medicine Application Institute, Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China; Institute of Basic Medical Sciences, Center for Diabetic Systems Medicine (Guangxi Key Laboratory of Excellence), Guilin Medical University, Guangxi, Guilin, 541100, China
| | - Xiaocan Lei
- Clinical Anatomy & Reproductive Medicine Application Institute, Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Zhuo Chen
- Hunan Province Innovative Training Base for Medical Postgraduates, University of South China and Yueyang Women & Children's Medical Center, Institute of Reproductive Medicine, Yueyang, Hunan, 416000, China
| | - Zhongcheng Mo
- Institute of Basic Medical Sciences, Center for Diabetic Systems Medicine (Guangxi Key Laboratory of Excellence), Guilin Medical University, Guangxi, Guilin, 541100, China; Hunan Province Innovative Training Base for Medical Postgraduates, University of South China and Yueyang Women & Children's Medical Center, Institute of Reproductive Medicine, Yueyang, Hunan, 416000, China.
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Abstract
Chimeras are widely acknowledged as the gold standard for assessing stem cell pluripotency, based on their capacity to test donor cell lineage potential in the context of an organized, normally developing tissue. Experimental chimeras provide key insights into mammalian developmental mechanisms and offer a resource for interrogating the fate potential of various pluripotent stem cell states. We highlight the applications and current limitations presented by intra- and inter-species chimeras and consider their future contribution to the stem cell field. Despite the technical and ethical demands of experimental chimeras, including human-interspecies chimeras, they are a provocative resource for achieving regenerative medicine goals.
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Affiliation(s)
- Victoria L Mascetti
- British Heart Foundation Oxbridge Centre for Regenerative Medicine, University of Cambridge, Cambridge, CB2 0SZ, UK; Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0SZ, UK.
| | - Roger A Pedersen
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0SZ, UK; Department of Paediatrics, University of Cambridge, Cambridge, CB2 0SZ, UK.
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Bistakova J, Forgacs Z, Bartos Z, Szivosne MR, Jambor T, Knazicka Z, Tvrda E, Libova L, Goc Z, Massanyi P, Lukac N. Effects of 4-nonylphenol on the steroidogenesis of human adrenocarcinoma cell line (NCI-H295R). JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2017; 52:221-227. [PMID: 27835057 DOI: 10.1080/10934529.2016.1246936] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, the human H295R adrenocarcinoma cell line was exposed to different concentrations (0.04, 0.2, 1.0, 2.5 or 5 µg/mL) of nonylphenol (NP) to investigate its impact on the inhibition or induction of the steroid hormones production during 48 h of in vitro culture. The hormone production was measured using ELISA kits. Results of this in vitro study suggest various effect of nonylphenol in relatively low concentrations on the selected steroid hormones production by the human H295R adrenocarcinoma cell line. The inhibiting impact on progesterone and androstenedione production was observed. The amount of progesterone was significantly decreased at 1.0, 2.5 and 5 µg/mL NP. Equally, the androstenedione production significantly decreased at 5 µg/mL NP. On the other hand, the amount of testosterone and 17β-estradiol was induced after nonylphenol exposition. The significant increase of testosterone level was found out at treatment with 5 µg/mL NP. 17β-estradiol production significantly increased at the doses of 2.5 and 5 µg/mL NP.
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Affiliation(s)
- Jana Bistakova
- a Department of Animal Physiology , Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture , Nitra , Slovak Republic
| | - Zsolt Forgacs
- b National Institute of Chemical Safety , Budapest , Hungary
| | - Zsuzsa Bartos
- b National Institute of Chemical Safety , Budapest , Hungary
| | | | - Tomas Jambor
- a Department of Animal Physiology , Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture , Nitra , Slovak Republic
| | - Zuzana Knazicka
- c AgroBioTech Research Centre, Slovak University of Agriculture , Nitra , Slovak Republic
| | - Eva Tvrda
- a Department of Animal Physiology , Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture , Nitra , Slovak Republic
| | - Lubica Libova
- d St. Ladislav Institute of Health and Social Sciences, Nove Zamky, St. Elizabeth University of Health and Social Sciences , Bratislava , Slovak Republic
| | - Zofia Goc
- e Institute of Biology, Faculty of Geography and Biology, Pedagogical University of Cracow , Cracow , Poland
| | - Peter Massanyi
- a Department of Animal Physiology , Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture , Nitra , Slovak Republic
- e Institute of Biology, Faculty of Geography and Biology, Pedagogical University of Cracow , Cracow , Poland
| | - Norbert Lukac
- a Department of Animal Physiology , Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture , Nitra , Slovak Republic
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Tetraploid Embryonic Stem Cells Maintain Pluripotency and Differentiation Potency into Three Germ Layers. PLoS One 2015; 10:e0130585. [PMID: 26091100 PMCID: PMC4474668 DOI: 10.1371/journal.pone.0130585] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 05/21/2015] [Indexed: 01/06/2023] Open
Abstract
Polyploid amphibians and fishes occur naturally in nature, while polyploid mammals do not. For example, tetraploid mouse embryos normally develop into blastocysts, but exhibit abnormalities and die soon after implantation. Thus, polyploidization is thought to be harmful during early mammalian development. However, the mechanisms through which polyploidization disrupts development are still poorly understood. In this study, we aimed to elucidate how genome duplication affects early mammalian development. To this end, we established tetraploid embryonic stem cells (TESCs) produced from the inner cell masses of tetraploid blastocysts using electrofusion of two-cell embryos in mice and studied the developmental potential of TESCs. We demonstrated that TESCs possessed essential pluripotency and differentiation potency to form teratomas, which differentiated into the three germ layers, including diploid embryonic stem cells. TESCs also contributed to the inner cell masses in aggregated chimeric blastocysts, despite the observation that tetraploid embryos fail in normal development soon after implantation in mice. In TESCs, stability after several passages, colony morphology, and alkaline phosphatase activity were similar to those of diploid ESCs. TESCs also exhibited sufficient expression and localization of pluripotent markers and retained the normal epigenetic status of relevant reprogramming factors. TESCs proliferated at a slower rate than ESCs, indicating that the difference in genomic dosage was responsible for the different growth rates. Thus, our findings suggested that mouse ESCs maintained intrinsic pluripotency and differentiation potential despite tetraploidization, providing insights into our understanding of developmental elimination in polyploid mammals.
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Lin CJ, Amano T, Tang Y, Tian X. Improved derivation efficiency and pluripotency of stem cells from the refractory inbred C57BL/6 mouse strain by small molecules. PLoS One 2014; 9:e106916. [PMID: 25211343 PMCID: PMC4161378 DOI: 10.1371/journal.pone.0106916] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 08/02/2014] [Indexed: 12/29/2022] Open
Abstract
The ability of small molecules to maintain self-renewal and to inhibit differentiation of pluripotent stem cells has been well-demonstrated. Two widely used molecules are PD 98059 (PD), an inhibitor of extracellular-signal-regulated kinase 1 (ERK), and SC1 (Pluripotin), which inhibits the RasGAP and ERK pathways. However, no studies have been conducted to compare their effects on the pluripotency and derivation of embryonic stem (ES) cells from inbred mice C57BL/6, an important mouse strain frequently used to model behavior, cognitive functions, immune system, and metabolic disorders in humans and also the first mouse strain chosen to be sequenced for its entire genome. We found significantly increased derivation efficiency of ES cells from in vivo fertilized embryos (fES) of C57BL/6 with the use of PD (71.4% over the control of 35.3%). Because fES and ES from cloned embryos (ntES) are not distinguishable in transcription or translation profiles, we used ntES cells to compare the effect of small molecules on their in vitro characteristics, in vitro differentiation ability, and the ability to generate full-term ntES-4N pups by tetraploid complementation. NtES cells exhibited typical ES characteristics and up-regulated Sox2 expression in media with either small-molecule. Higher rates of full term ntES-4N pup were generated by the supplementation of PD or SC1. We obtained the highest efficiency of ntES-4N pup generation ever reported from this strain by supplementing ES medium with SC1. Lastly, we compared the pluripotency of fES, ntES and induced pluripotent stem (iPS) cells of C57BL/6 background using the tetraploid complementation assay. A significant increase in implantation sites and the number of full-term pups were obtained when fES, ntES, and iPS cells were cultured with SC1 compared to the control ES medium. In conclusion, supplementing ES cell culture medium with PD and SC1 increases the derivation efficiency and pluripotency, respectively, of stem cells derived from the refractory inbred C57BL/6 strain.
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Affiliation(s)
- Chih-Jen Lin
- Department of Animal Science, University of Connecticut, Storrs, Connecticut, United States of America
- University of Connecticut Stem Cell Institute, University of Connecticut, Storrs, Connecticut, United States of America
| | - Tomokazu Amano
- University of Connecticut Stem Cell Institute, University of Connecticut, Storrs, Connecticut, United States of America
| | - Yong Tang
- Department of Animal Science, University of Connecticut, Storrs, Connecticut, United States of America
- University of Connecticut Stem Cell Institute, University of Connecticut, Storrs, Connecticut, United States of America
| | - Xiuchun Tian
- Department of Animal Science, University of Connecticut, Storrs, Connecticut, United States of America
- University of Connecticut Stem Cell Institute, University of Connecticut, Storrs, Connecticut, United States of America
- * E-mail:
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Petkova R, Arabadjiev B, Chakarov S, Pankov R. Current state of the opportunities for derivation of germ-like cells from pluripotent stem cells: are you a man, or a mouse? BIOTECHNOL BIOTEC EQ 2014; 28:184-191. [PMID: 26019504 PMCID: PMC4434091 DOI: 10.1080/13102818.2014.907037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 11/14/2013] [Indexed: 01/15/2023] Open
Abstract
The concept of pluripotency as a prerogative of cells of early mammal embryos and cultured embryonic stem cells (ESC) has been invalidated with the advent of induced pluripotent stem cells. Later, it became clear that the ability to generate all cell types of the adult organism is also a questionable aspect of pluripotency, as there are cell types, such as germ cells, which are difficult to produce from pluripotent stem cells. Recently it has been proposed that there are at least two different states of pluripotency; namely, the naïve, or ground state, and the primed state, which may differ radically in terms of timeline of existence, signalling mechanisms, cell properties, capacity for differentiation into different cell types, etc. Germ-like male and female rodent cells have been successfully produced in vitro from ESC and induced pluripotent stem cells. The attempts to derive primate primordial germ cells (PGC) and germ cells in vitro from pluripotent stem cells, however, still have a low success rate, especially with the female germline. The paper reviews the properties of rodent and primate ESC with regard to their capacity for differentiation in vitro to germ-like cells, outlining the possible caveats to derivation of PGC and germ cells from primate and human pluripotent cells.
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Affiliation(s)
- Rumena Petkova
- Scientific Technological Service (STS) Ltd., Sofia, Bulgaria
| | - Borislav Arabadjiev
- Scientific Technological Service (STS) Ltd., Sofia, Bulgaria
- Department of Cell Biology, Histology and Embryology, and Department of Biochemistry, Faculty of Biology, Sofia University ‘St. Kliment Ohridsky’, Sofia, Bulgaria
| | - Stoyan Chakarov
- Department of Cell Biology, Histology and Embryology, and Department of Biochemistry, Faculty of Biology, Sofia University ‘St. Kliment Ohridsky’, Sofia, Bulgaria
| | - Roumen Pankov
- Department of Cell Biology, Histology and Embryology, and Department of Biochemistry, Faculty of Biology, Sofia University ‘St. Kliment Ohridsky’, Sofia, Bulgaria
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Lin CJ, Conti M, Ramalho-Santos M. Histone variant H3.3 maintains a decondensed chromatin state essential for mouse preimplantation development. Development 2013; 140:3624-34. [PMID: 23903189 DOI: 10.1242/dev.095513] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Histone variants can replace canonical histones in the nucleosome and modify chromatin structure and gene expression. The histone variant H3.3 preferentially associates with active chromatin and has been implicated in the regulation of a diverse range of developmental processes. However, the mechanisms by which H3.3 may regulate gene activity are unclear and gene duplication has hampered an analysis of H3.3 function in mouse. Here, we report that the specific knockdown of H3.3 in fertilized mouse zygotes leads to developmental arrest at the morula stage. This phenotype can be rescued by exogenous H3.3 but not by canonical H3.1 mRNA. Loss of H3.3 leads to over-condensation and mis-segregation of chromosomes as early as the two-cell stage, with corresponding high levels of aneuploidy, but does not appear to affect zygotic gene activation at the two-cell stage or lineage gene transcription at the morula stage. H3.3-deficient embryos have significantly reduced levels of markers of open chromatin, such as H3K36me2 and H4K16Ac. Importantly, a mutation in H3.3K36 that disrupts H3K36 methylation (H3.3K36R) does not rescue the H3.3 knockdown (KD) phenotype. In addition, H3.3 KD embryos have increased incorporation of linker H1. Knockdown of Mof (Kat8), an acetyltransferase specific for H4K16, similarly leads to excessive H1 incorporation. Remarkably, pan-H1 RNA interference (RNAi) partially rescues the chromosome condensation of H3.3 KD embryos and allows development to the blastocyst stage. These results reveal that H3.3 mediates a balance between open and condensed chromatin that is crucial for the fidelity of chromosome segregation during early mouse development.
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Affiliation(s)
- Chih-Jen Lin
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Obstetrics and Gynecology and Center for Reproductive Sciences, University of California San Francisco, 35 Medical Center Way, San Francisco, CA 94143, USA
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Polejaeva I, Mitalipov S. Stem cell potency and the ability to contribute to chimeric organisms. Reproduction 2013; 145:R81-8. [PMID: 23221011 DOI: 10.1530/rep-12-0396] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mouse embryonic chimeras are a well-established tool for studying cell lineage commitment and pluripotency. Experimental chimeras were successfully produced by combining two or more preimplantation embryos or by introducing into host embryo cultured pluripotent embryonic stem cells (ESCs). Chimera production using genetically modified ESCs became the method of choice for the generation of knockout or knockin mice. Although the derivation of ESCs or ESC-like cells has been reported for other species, only mouse and rat pluripotent stem cells have been shown to contribute to germline-competent chimeras, which is the defining feature of ESCs. Herein, we describe different approaches employed for the generation of embryonic chimeras, define chimera-competent cell types, and describe cases of spontaneous chimerism in humans. We also review the current state of derivation of pluripotent stem cells in several species and discuss outcomes of various chimera studies when such cells are used.
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Affiliation(s)
- Irina Polejaeva
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, UT 84321, USA
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