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Gandhi N, Wills L, Akers K, Su Y, Niccum P, Murali TM, Rajagopalan P. Comparative transcriptomic and phenotypic analysis of induced pluripotent stem cell hepatocyte-like cells and primary human hepatocytes. Cell Tissue Res 2024; 396:119-139. [PMID: 38369646 DOI: 10.1007/s00441-024-03868-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 01/22/2024] [Indexed: 02/20/2024]
Abstract
Primary human hepatocytes (PHHs) are used extensively for in vitro liver cultures to study hepatic functions. However, limited availability and invasive retrieval prevent their widespread use. Induced pluripotent stem cells exhibit significant potential since they can be obtained non-invasively and differentiated into hepatic lineages, such as hepatocyte-like cells (iHLCs). However, there are concerns about their fetal phenotypic characteristics and their hepatic functions compared to PHHs in culture. Therefore, we performed an RNA-sequencing (RNA-seq) analysis to understand pathways that are either up- or downregulated in each cell type. Analysis of the RNA-seq data showed an upregulation in the bile secretion pathway where genes such as AQP9 and UGT1A1 were higher expressed in PHHs compared to iHLCs by 455- and 15-fold, respectively. Upon immunostaining, bile canaliculi were shown to be present in PHHs. The TCA cycle in PHHs was upregulated compared to iHLCs. Cellular analysis showed a 2-2.5-fold increase in normalized urea production in PHHs compared to iHLCs. In addition, drug metabolism pathways, including cytochrome P450 (CYP450) and UDP-glucuronosyltransferase enzymes, were upregulated in PHHs compared to iHLCs. Of note, CYP2E1 gene expression was significantly higher (21,810-fold) in PHHs. Acetaminophen and ethanol were administered to PHH and iHLC cultures to investigate differences in biotransformation. CYP450 activity of baseline and toxicant-treated samples was significantly higher in PHHs compared to iHLCs. Our analysis revealed that iHLCs have substantial differences from PHHs in critical hepatic functions. These results have highlighted the differences in gene expression and hepatic functions between PHHs and iHLCs to motivate future investigation.
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Affiliation(s)
- Neeti Gandhi
- Department of Chemical Engineering, Virginia Tech, 333 Kelly Hall, Blacksburg, VA, 24061, USA
| | - Lauren Wills
- School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, USA
| | - Kyle Akers
- Genetics, Bioinformatics, and Computational Biology Ph.D. Program, Virginia Tech, Blacksburg, VA, USA
| | - Yiqi Su
- Department of Computer Science, Virginia Tech, Blacksburg, VA, USA
| | - Parker Niccum
- Genetics, Bioinformatics, and Computational Biology Ph.D. Program, Virginia Tech, Blacksburg, VA, USA
| | - T M Murali
- Department of Computer Science, Virginia Tech, Blacksburg, VA, USA
| | - Padmavathy Rajagopalan
- Department of Chemical Engineering, Virginia Tech, 333 Kelly Hall, Blacksburg, VA, 24061, USA.
- School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, USA.
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Xie XM, Cao QL, Sun YJ, Zhang J, Liu KL, Qin YF, Long WJ, Luo ZJ, Li XW, Liang XH, Yuan GD, Luo XP, Xuan XP. LRP6 Bidirectionally Regulates Insulin Sensitivity through Insulin Receptor and S6K Signaling in Rats with CG-IUGR. Curr Med Sci 2023; 43:274-283. [PMID: 36913109 DOI: 10.1007/s11596-022-2683-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 10/27/2022] [Indexed: 03/14/2023]
Abstract
OBJECTIVE Intrauterine growth restriction followed by postnatal catch-up growth (CG-IUGR) increases the risk of insulin resistance-related diseases. Low-density lipoprotein receptor-related protein 6 (LRP6) plays a substantial role in glucose metabolism. However, whether LRP6 is involved in the insulin resistance of CG-IUGR is unclear. This study aimed to explore the role of LRP6 in insulin signaling in response to CG-IUGR. METHODS The CG-IUGR rat model was established via a maternal gestational nutritional restriction followed by postnatal litter size reduction. The mRNA and protein expression of the components in the insulin pathway, LRP6/β-catenin and mammalian target of rapamycin (mTOR)/S6 kinase (S6K) signaling, was determined. Liver tissues were immunostained for the expression of LRP6 and β-catenin. LRP6 was overexpressed or silenced in primary hepatocytes to explore its role in insulin signaling. RESULTS Compared with the control rats, CG-IUGR rats showed higher homeostasis model assessment for insulin resistance (HOMA-IR) index and fasting insulin level, decreased insulin signaling, reduced mTOR/S6K/ insulin receptor substrate-1 (IRS-1) serine307 activity, and decreased LRP6/β-catenin in the liver tissue. The knockdown of LRP6 in hepatocytes from appropriate-for-gestational-age (AGA) rats led to reductions in insulin receptor (IR) signaling and mTOR/S6K/IRS-1 serine307 activity. In contrast, LRP6 overexpression in hepatocytes of CG-IUGR rats resulted in elevated IR signaling and mTOR/S6K/IRS-1 serine307 activity. CONCLUSION LRP6 regulated the insulin signaling in the CG-IUGR rats via two distinct pathways, IR and mTOR-S6K signaling. LRP6 may be a potential therapeutic target for insulin resistance in CG-IUGR individuals.
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Affiliation(s)
- Xue-Mei Xie
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Qiu-Li Cao
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Yu-Jie Sun
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Jie Zhang
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China.
| | - Kai-Li Liu
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Ying-Fen Qin
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Wen-Jun Long
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Zuo-Jie Luo
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Xiao-Wei Li
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Xing-Huan Liang
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Guan-Dou Yuan
- Division of Hepatobiliary Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Xiao-Ping Luo
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiu-Ping Xuan
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China.
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Qiu L, Kong B, Kong T, Wang H. Recent advances in liver-on-chips: Design, fabrication, and applications. SMART MEDICINE 2023; 2:e20220010. [PMID: 39188562 PMCID: PMC11235950 DOI: 10.1002/smmd.20220010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 10/20/2022] [Indexed: 08/28/2024]
Abstract
The liver is a multifunctional organ and the metabolic center of the human body. Most drugs and toxins are metabolized in the liver, resulting in varying degrees of hepatotoxicity. The damage of liver will seriously affect human health, so it is very important to study the prevention and treatment of liver diseases. At present, there are many research studies in this field. However, most of them are based on animal models, which are limited by the time-consuming processes and species difference between human and animals. In recent years, liver-on-chips have emerged and developed rapidly and are expected to replace animal models. Liver-on-chips refer to the use of a small number of liver cells on the chips to simulate the liver microenvironment and ultrastructure in vivo. They hold extensive applications in multiple fields by reproducing the unique physiological functions of the liver in vitro. In this review, we first introduced the physiology and pathology of liver and then described the cell system of liver-on-chips, the chip-based liver models, and the applications of liver-on-chips in liver transplantation, drug screening, and metabolic evaluation. Finally, we discussed the currently encountered challenges and future trends in liver-on-chips.
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Affiliation(s)
- Linjie Qiu
- The Eighth Affiliated HospitalSun Yat‐Sen UniversityShenzhenChina
- School of MedicineSun Yat‐Sen UniversityShenzhenChina
| | - Bin Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingDepartment of Biomedical EngineeringSchool of MedicineShenzhen UniversityShenzhenChina
| | - Tiantian Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingDepartment of Biomedical EngineeringSchool of MedicineShenzhen UniversityShenzhenChina
| | - Huan Wang
- The Eighth Affiliated HospitalSun Yat‐Sen UniversityShenzhenChina
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Bai F, Duan J, Yang D, Lai X, Zhu X, He X, Hu A. Integrative network analysis of circular RNAs reveals regulatory mechanisms for hepatic specification of human iPSC-derived endoderm. Stem Cell Res Ther 2022; 13:468. [PMID: 36076262 PMCID: PMC9461288 DOI: 10.1186/s13287-022-03160-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Human-induced pluripotent stem cell (hiPSC)-derived functional hepatic endoderm (HE) is supposed to be an alternative option for replacement therapy for end-stage liver disease. However, the high heterogeneity of HE cell populations is still challenging. Hepatic specification of definitive endoderm (DE) is an essential stage for HE induction in vitro. Recent studies have suggested that circular RNAs (circRNAs) determine the fate of stem cells by acting as competing endogenous RNAs (ceRNAs). To date, the relationships between endogenous circRNAs and hepatic specification remain elusive. METHODS The identities of DE and HE derived from hiPSCs were determined by qPCR, cell immunofluorescence, and ELISA. Differentially expressed circRNAs (DEcircRNAs) were analysed using the Arraystar Human circRNA Array. qPCR was performed to validate the candidate DEcircRNAs. Intersecting differentially expressed genes (DEGs) of the GSE128060 and GSE66282 data sets and the DEcircRNA-predicted mRNAs were imported into Cytoscape for ceRNA networks. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) were involved in the enrichment analysis. Hepatic markers and Wnt/β-catenin were detected in hsa_circ_004658-overexpressing cells by western blotting. Dual-luciferase reporter assays were used to evaluate the direct binding among hsa_circ_004658, miRNA-1200 and CDX2. DE cells were transfected with miR-1200 mimics, adenovirus containing CDX2, and Wnt/β-catenin was detected by western blotting. RESULTS hiPSC-derived DE and HE were obtained at 4 and 9 days after differentiation, as determined by hepatic markers. During hepatic specification, 626 upregulated and 208 downregulated DEcircRNAs were identified. Nine candidate DEcircRNAs were validated by qPCR. In the ceRNA networks, 111 circRNA-miRNA-mRNA pairs were involved, including 90 pairs associated with hsa_circ_004658. In addition, 53 DEGs were identified among the intersecting mRNAs of the GSE128060 and GSE66282 data sets and the hsa_circ_004658-targeted mRNAs. KEGG and GO analyses showed that the DEGs associated with hsa_circ_004658 were mainly enriched in the WNT signalling pathway. Furthermore, hsa_circ_004658 was preliminarily verified to promote hepatic specification, as determined by hepatic markers (AFP, ALB, HNF4A, and CK19) (p < 0.05). This promotive effect may be related to the inhibition of the Wnt/β-catenin signalling pathway (detected by β-catenin, p-β-catenin, and TCF4) when hsa_circ_004658 was overexpressed (p < 0.05). Dual-luciferase reporter assays showed that there were binding sites for miR-1200 in the hsa_circ_004658 sequence, and confirmed the candidate DEG (CDX2) as a miR-1200 target. The level of miR-1200 decreased and the level of CDX2 protein expression increased when hsa_circ_004658 was overexpressed (p < 0.05). In addition, the results showed that CDX2 may suppress the Wnt/β-catenin signalling during hepatic specification (p < 0.05). CONCLUSIONS This study analysed the profiles of circRNAs during hepatic specification. We identified the hsa_circ_004658/miR-1200/CDX2 axis and preliminarily verified its effect on the Wnt/β-catenin signalling pathway during hepatic specification. These results provide novel insight into the molecular mechanisms involved in hepatic specification and could improve liver development in the future.
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Affiliation(s)
- Fang Bai
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China.,Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jinliang Duan
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China
| | - Daopeng Yang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China
| | - Xingqiang Lai
- Department of Cardiology, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Xiaofeng Zhu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China
| | - Xiaoshun He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China
| | - Anbin Hu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), Guangzhou, Guangdong, China. .,Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China.
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Aobchey P, Utama K, Niamsup H, Sangthong P. Gene expression analysis of RCC1, VAV2, RPA3, and SRPK1 for human cervical cancer biomarkers. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2021.101445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Liu Q, Lv C, Jiang Y, Luo K, Gao Y, Liu J, Zhang X, Mohammad Omar J, Jin S. From hair to liver: emerging application of hair follicle mesenchymal stem cell transplantation reverses liver cirrhosis by blocking the TGF-β/Smad signaling pathway to inhibit pathological HSC activation. PeerJ 2022; 10:e12872. [PMID: 35186473 PMCID: PMC8855721 DOI: 10.7717/peerj.12872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 01/11/2022] [Indexed: 01/10/2023] Open
Abstract
Liver cirrhosis (LC) involves multiple systems throughout the body, and patients with LC often die of multiple organ failure. However, few drugs are useful to treat LC. Hair follicle mesenchymal stem cells (HF-MSCs) are derived from the dermal papilla and the bulge area of hair follicles and are pluripotent stem cells in the mesoderm with broad prospects in regenerative medicine. As an emerging seed cell type widely used in skin wound healing and plastic surgery, HF-MSCs show considerable prospects in the treatment of LC due to their proliferation and multidirectional differentiation capabilities. We established an LC model in C57BL/6J mice by administering carbon tetrachloride (CCl4) and injected HF-MSCs through the tail vein to explore the therapeutic effects and potential mechanisms of HF-MSCs on LC. Here, we found that HF-MSCs improved liver function and ameliorated the liver pathology of LC. Notably, PKH67-labeled HF-MSCs were detected in the injured liver and expressed the hepatocyte-specific markers cytokeratin 18 (CK18) and albumin (ALB). In addition, in contrast to that in the LC group, the α-SMA expression showed a decreasing trend in the treatment group in vitro and in vivo, indicating that the pathological activation of hepatic stellate cells (HSCs) was inhibited by HF-MSC treatment. Moreover, the levels of transforming growth factor β (TGF-β1) and p-Smad3, a signaling molecule downstream of TGF-β1, were increased in mice with LC, while HF-MSC treatment reversed these changes in vivo and in vitro. Based on these findings, HF-MSCs may reverse LC by blocking the TGF-β/Smad pathway and inhibiting the pathological activation of HSCs, which may provide evidence for the application of HF-MSCs to treat LC.
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Affiliation(s)
- Qi Liu
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Chengqian Lv
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yanan Jiang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy of Harbin Medical University, Harbin, China,Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, China
| | - Kunpeng Luo
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yang Gao
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jingyang Liu
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xu Zhang
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jan Mohammad Omar
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Shizhu Jin
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Xie Y, Yao J, Jin W, Ren L, Li X. Induction and Maturation of Hepatocyte-Like Cells In Vitro: Focus on Technological Advances and Challenges. Front Cell Dev Biol 2021; 9:765980. [PMID: 34901010 PMCID: PMC8662991 DOI: 10.3389/fcell.2021.765980] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/08/2021] [Indexed: 12/17/2022] Open
Abstract
Limited by the poor proliferation and restricted sources of adult hepatocytes, there is an urgent need to find substitutes for proliferation and cultivation of mature hepatocytes in vitro for use in disease treatment, drug approval, and toxicity testing. Hepatocyte-like cells (HLCs), which originate from undifferentiated stem cells or modified adult cells, are considered good candidates because of their advantages in terms of cell source and in vitro expansion ability. However, the majority of induced HLCs are in an immature state, and their degree of differentiation is heterogeneous, diminishing their usability in basic research and limiting their clinical application. Therefore, various methods have been developed to promote the maturation of HLCs, including chemical approaches, alteration of cell culture systems, and genetic manipulation, to meet the needs of in vivo transplantation and in vitro model establishment. This review proposes different cell types for the induction of HLCs, and provide a comprehensive overview of various techniques to promote the generation and maturation of HLCs in vitro.
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Affiliation(s)
- Ye Xie
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Jia Yao
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, Lanzhou, China
| | - Weilin Jin
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Institute of Cancer Neuroscience, The First Hospital of Lanzhou University, Lanzhou, China.,The Medical Frontier Innovation Research Center, The First Hospital of Lanzhou University, Lanzhou, China
| | - Longfei Ren
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,The Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou, China
| | - Xun Li
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, Lanzhou, China.,The Medical Frontier Innovation Research Center, The First Hospital of Lanzhou University, Lanzhou, China.,The Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou, China.,Hepatopancreatobiliary Surgery Institute of Gansu Province, Lanzhou, China
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Lima DFPDA, da Cruz VAR, Pereira GL, Curi RA, Costa RB, de Camargo GMF. Genomic Regions Associated with the Position and Number of Hair Whorls in Horses. Animals (Basel) 2021; 11:ani11102925. [PMID: 34679946 PMCID: PMC8532986 DOI: 10.3390/ani11102925] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/06/2021] [Accepted: 10/06/2021] [Indexed: 12/31/2022] Open
Abstract
Simple Summary Whorls have been used to indicate the temperaments of domestic animals; however, little is known about the biological events that drive this association. The present study is the first that aims to find the main genomic regions that influence the whorl traits in livestock, with horses as a model. Genes related to hair follicle growth were found. Interestingly, some of these genes also influence psychiatric diseases and neurological disorders, thus evidencing a consistent biological explanation for the association. Abstract The position and number of hair whorls have been associated with the behavior, temperament, and laterality of horses. The easy observation of whorls assists in the prediction of reactivity, and thus permits the development of better measures of handling, training, mounting, and riding horses. However, little is known about the genetics involved in the formation of hair whorls. Therefore, the aim of this study was to perform a genome-wide association analysis to identify chromosome regions and candidate genes associated with hair whorl traits. Data from 342 Quarter Horses genotyped for approximately 53,000 SNPs were used in an association study using a single-step procedure. The following traits were analyzed: vertical position of hair whorl on the head, number of whorls on the head, and number of whorls on the left and right sides of the neck. The traits had between one and three genomic windows associated. Each of them explained at least 4% of the additive variance. The windows accounted for 20–80% of additive variance for each trait analyzed. Many of the prospected genes are related to hair follicle growth. Some of these genes exert a pleiotropic effect on neurological and behavioral traits. This is the first indication of biological and physiological activity that might explain the association of hair whorls and temperament.
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Affiliation(s)
- Diogo Felipe Pereira de Assis Lima
- Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia (UFBA), Salvador 40170-110, BA, Brazil; (D.F.P.d.A.L.); (V.A.R.d.C.); (R.B.C.)
| | - Valdecy Aparecida Rocha da Cruz
- Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia (UFBA), Salvador 40170-110, BA, Brazil; (D.F.P.d.A.L.); (V.A.R.d.C.); (R.B.C.)
| | - Guilherme Luís Pereira
- Departamento de Melhoramento e Nutrição Animal, Universidade Estadual Paulista (Unesp), Botucatu 18618-681, SP, Brazil; (G.L.P.); (R.A.C.)
| | - Rogério Abdallah Curi
- Departamento de Melhoramento e Nutrição Animal, Universidade Estadual Paulista (Unesp), Botucatu 18618-681, SP, Brazil; (G.L.P.); (R.A.C.)
| | - Raphael Bermal Costa
- Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia (UFBA), Salvador 40170-110, BA, Brazil; (D.F.P.d.A.L.); (V.A.R.d.C.); (R.B.C.)
| | - Gregório Miguel Ferreira de Camargo
- Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia (UFBA), Salvador 40170-110, BA, Brazil; (D.F.P.d.A.L.); (V.A.R.d.C.); (R.B.C.)
- Correspondence:
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Systematic transcriptome-based comparison of cellular adaptive stress response activation networks in hepatic stem cell-derived progeny and primary human hepatocytes. Toxicol In Vitro 2021; 73:105107. [PMID: 33545341 DOI: 10.1016/j.tiv.2021.105107] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/12/2021] [Accepted: 01/30/2021] [Indexed: 12/12/2022]
Abstract
Various adaptive cellular stress response pathways are critical in the pathophysiology of liver disease and drug-induced liver injury. Human-induced pluripotent stem cell (hiPSC)-derived hepatocyte-like cells (HLCs) provide a promising tool to study cellular stress response pathways, but in this context there is limited insight on how HLCs compare to other in vitro liver models. Here, we systematically compared the transcriptomic profiles upon chemical activation in HLCs, hiPSC, primary human hepatocytes (PHH) and HepG2 liver cancer cells. We used targeted RNA-sequencing to map concentration transcriptional response using benchmark concentration modeling for the various stress responses in the different test systems. We found that HLCs are very sensitive towards oxidative stress and inflammation conditions as corresponding genes were activated at over 3 fold lower concentrations of the corresponding pathway inducing compounds as compared to PHH. PHH were the most sensitive model when studying UPR related effects. Due to the non-proliferative nature of PHH and HLCs, these do not pose a good/sensitive model to pick up DNA damage responses, while hiPSC and HepG2 were more sensitive in these conditions. We envision that this study contributes to a better understanding on how HLCs can contribute to the assessment of cell physiological stress response activation to predict hepatotoxic events.
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