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Luo QY, Zhang SW, Wu HY, Mo JY, Yu JE, He RK, Jiang ZY, Zhu KJ, Liu XY, Lin ZL, Sheng JZ, Zhang Y, Wu YT, Huang HF. Safety of embryo cryopreservation: insights from mid-term placental transcriptional changes. Reprod Biol Endocrinol 2024; 22:80. [PMID: 38997724 PMCID: PMC11241961 DOI: 10.1186/s12958-024-01241-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 06/04/2024] [Indexed: 07/14/2024] Open
Abstract
BACKGROUND In recent years, with benefits from the continuous improvement of clinical technology and the advantage of fertility preservation, the application of embryo cryopreservation has been growing rapidly worldwide. However, amidst this growth, concerns about its safety persist. Numerous studies have highlighted the elevated risk of perinatal complications linked to frozen embryo transfer (FET), such as large for gestational age (LGA) and hypertensive disorders during pregnancy. Thus, it is imperative to explore the potential risk of embryo cryopreservation and its related mechanisms. METHODS Given the strict ethical constraints on clinical samples, we employed mouse models in this study. Three experimental groups were established: the naturally conceived (NC) group, the fresh embryo transfer (Fresh-ET) group, and the FET group. Blastocyst formation rates and implantation rates were calculated post-embryo cryopreservation. The impact of FET on fetal growth was evaluated upon fetal and placental weight. Placental RNA-seq was conducted, encompassing comprehensive analyses of various comparisons (Fresh-ET vs. NC, FET vs. NC, and FET vs. Fresh-ET). RESULTS Reduced rates of blastocyst formation and implantation were observed post-embryo cryopreservation. Fresh-ET resulted in a significant decrease in fetal weight compared to NC group, whereas FET reversed this decline. RNA-seq analysis indicated that the majority of the expression changes in FET were inherited from Fresh-ET, and alterations solely attributed to embryo cryopreservation were moderate. Unexpectedly, certain genes that showed alterations in Fresh-ET tended to be restored in FET. Further analysis suggested that this regression may underlie the improvement of fetal growth restriction in FET. The expression of imprinted genes was disrupted in both FET and Fresh-ET groups. CONCLUSION Based on our experimental data on mouse models, the impact of embryo cryopreservation is less pronounced than other in vitro manipulations in Fresh-ET. However, the impairment of the embryonic developmental potential and the gene alterations in placenta still suggested it to be a risky operation.
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Affiliation(s)
- Qin-Yu Luo
- Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Si-Wei Zhang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China
| | - Hai-Yan Wu
- Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jia-Ying Mo
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Jia-En Yu
- Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ren-Ke He
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Zhao-Ying Jiang
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Ke-Jing Zhu
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Xue-Ying Liu
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Zhong-Liang Lin
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Jian-Zhong Sheng
- Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yu Zhang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China.
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences, Shanghai, (No.2019RU056), China.
- Shanghai Key Laboratory of Reproduction and Development, Shanghai, China.
| | - Yan-Ting Wu
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China.
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences, Shanghai, (No.2019RU056), China.
- Shanghai Key Laboratory of Reproduction and Development, Shanghai, China.
| | - He-Feng Huang
- Key Laboratory of Reproductive Genetics (Ministry of Education), Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China.
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China.
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences, Shanghai, (No.2019RU056), China.
- Shanghai Key Laboratory of Reproduction and Development, Shanghai, China.
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Liu SS, Fang X, Wen X, Liu JS, Alip M, Sun T, Wang YY, Chen HW. How mesenchymal stem cells transform into adipocytes: Overview of the current understanding of adipogenic differentiation. World J Stem Cells 2024; 16:245-256. [PMID: 38577237 PMCID: PMC10989283 DOI: 10.4252/wjsc.v16.i3.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/15/2024] [Accepted: 02/18/2024] [Indexed: 03/25/2024] Open
Abstract
Mesenchymal stem cells (MSCs) are stem/progenitor cells capable of self-renewal and differentiation into osteoblasts, chondrocytes and adipocytes. The transformation of multipotent MSCs to adipocytes mainly involves two subsequent steps from MSCs to preadipocytes and further preadipocytes into adipocytes, in which the process MSCs are precisely controlled to commit to the adipogenic lineage and then mature into adipocytes. Previous studies have shown that the master transcription factors C/enhancer-binding protein alpha and peroxisome proliferation activator receptor gamma play vital roles in adipogenesis. However, the mechanism underlying the adipogenic differentiation of MSCs is not fully understood. Here, the current knowledge of adipogenic differentiation in MSCs is reviewed, focusing on signaling pathways, noncoding RNAs and epigenetic effects on DNA methylation and acetylation during MSC differentiation. Finally, the relationship between maladipogenic differentiation and diseases is briefly discussed. We hope that this review can broaden and deepen our understanding of how MSCs turn into adipocytes.
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Affiliation(s)
- Shan-Shan Liu
- Department of Reumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Xiang Fang
- Department of Emergency, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Xin Wen
- Department of Reumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Ji-Shan Liu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Miribangvl Alip
- Department of Reumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Tian Sun
- Department of Reumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China
| | - Yuan-Yuan Wang
- Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu 233000, Anhui Province, China
| | - Hong-Wei Chen
- Department of Reumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China.
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Juárez-Barber E, Corachán A, Carbajo-García MC, Faus A, Vidal C, Giles J, Pellicer A, Cervelló I, Ferrero H. Transcriptome analysis of adenomyosis eutopic endometrium reveals molecular mechanisms involved in adenomyosis-related implantation failure and pregnancy disorders. Reprod Biol Endocrinol 2024; 22:10. [PMID: 38195505 PMCID: PMC10775471 DOI: 10.1186/s12958-023-01182-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 12/28/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Women with adenomyosis are characterized by having defective decidualization, impaired endometrial receptivity and/or embryo-maternal communication, and implantation failure. However, the molecular mechanisms underlying adenomyosis-related infertility remain unknown, mainly because of the restricted accessibility and the difficult preservation of endometrial tissue in vitro. We have recently shown that adenomyosis patient-derived endometrial organoids, maintain disease-specific features while differentiated into mid-secretory and gestational endometrial phase, overcoming these research barriers and providing a robust platform to study adenomyosis pathogenesis and the associated molecular dysregulation related to implantation and pregnancy disorders. For this reason, we aim to characterize the dysregulated mechanisms in the mid-secretory and gestational endometrium of patients with adenomyosis by RNA-sequencing. METHODS Endometrial organoids were derived from endometrial biopsies collected in the proliferative phase of women with adenomyosis (ADENO) or healthy oocyte donors (CONTROL) (n = 15/group) and differentiated into mid-secretory (-SECorg) and gestational (-GESTorg) phases in vitro. Following RNA-sequencing, the significantly differentially expressed genes (DEGs) (FDR < 0.05) were identified and selected for subsequent functional enrichment analysis and QIAGEN Ingenuity Pathway Analysis (IPA). Statistical differences in gene expression were evaluated with the Student's t-test or Wilcoxon test. RESULTS We identified 1,430 DEGs in ADENO-SECorg and 1,999 DEGs in ADENO-GESTorg. In ADENO-SECorg, upregulated genes included OLFM1, FXYD5, and RUNX2, which are involved in impaired endometrial receptivity and implantation failure, while downregulated genes included RRM2, SOSTDC1, and CHAC2 implicated in recurrent implantation failure. In ADENO-GESTorg, upregulated CXCL14 and CYP24A1 and downregulated PGR were related to pregnancy loss. IPA predicted a significant inhibition of ID1 signaling, histamine degradation, and activation of HMGB1 and Senescence pathways, which are related to implantation failure. Alternatively, IPA predicted an inhibition of D-myo-inositol biosynthesis and VEGF signaling, and upregulation of Rho pathway, which are related to pregnancy loss and preeclampsia. CONCLUSIONS Identifying dysregulated molecular mechanisms in mid-secretory and gestational endometrium of adenomyosis women contributes to the understanding of adenomyosis-related implantation failure and/or pregnancy disorders revealing potential therapeutic targets. Following experimental validation of our transcriptomic and in silico findings, our differentiated adenomyosis patient-derived organoids have the potential to provide a reliable platform for drug discovery, development, and personalized drug screening for affected patients.
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Affiliation(s)
- Elena Juárez-Barber
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
| | - Ana Corachán
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
- Department of Pediatrics, Obstetrics and Gynecology, Universidad de Valencia, Valencia, 46010, Spain
| | - María Cristina Carbajo-García
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
- Department of Pediatrics, Obstetrics and Gynecology, Universidad de Valencia, Valencia, 46010, Spain
| | - Amparo Faus
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
| | | | - Juan Giles
- IVI-RMA Valencia, Valencia, 46015, Spain
| | - Antonio Pellicer
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
- IVI-RMA Rome, Rome, 00197, Italy
| | - Irene Cervelló
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain
| | - Hortensia Ferrero
- Fundación IVI, Instituto de Investigación Sanitaria La Fe, Valencia, 46026, Spain.
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Kaimala S, Ansari SA, Emerald BS. DNA methylation in the pathogenesis of type 2 diabetes. VITAMINS AND HORMONES 2023; 122:147-169. [PMID: 36863792 DOI: 10.1016/bs.vh.2022.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Type 2 diabetes (T2D) is a metabolic disease characterized by the development of β-cell dysfunction with hepatic, muscular and adipose tissue insulin resistance. Although the molecular mechanisms leading to its development are not entirely known, investigations of its causes reveal a multifactorial contribution to its development and progression in most cases. In addition, regulatory interactions mediated by epigenetic modifications such as DNA methylation, histone tail modifications and regulatory RNAs have been found to play a significant role in the etiology of T2D. In this chapter, we discuss the role of DNA methylation and its dynamics in the development of the pathological features of T2D.
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Affiliation(s)
- Suneesh Kaimala
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Suraiya Anjum Ansari
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates; Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Bright Starling Emerald
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates; Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates.
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5
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Bae H, Yang C, Lim W, Song G. Identification of tissue-specific expression of CXCL14 in black rockfish (Sebastes schlegelii). FISH & SHELLFISH IMMUNOLOGY 2021; 112:135-142. [PMID: 33746059 DOI: 10.1016/j.fsi.2021.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/18/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
CXCL14 is a chemokine which is orthologous in mammals and fish. CXCL14 has a functional role in different organs, with immunomodulatory functions in mammals, but its expression and function in fish is not well known. Moreover, it shows no effects related to immunity in the central nervous system or the reproductive tract in diverse species. Black rockfish (Sebastes schlegelii) is an economically important fish in Asian countries, whose CXCL14 expression pattern is yet to be understood. In this study, the homology of the CXCL14 amino acid sequence in S. schlegelii was compared with that in other species, including fish. Moreover, in situ hybridization analysis revealed that it was highly expressed in the brain and ovary of S. schlegelii. Taken together, we identified for the first time, the cell-specific expression of CXCL14 in S. schlegelii.
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Affiliation(s)
- Hyocheol Bae
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Changwon Yang
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Whasun Lim
- Department of Food and Nutrition, Kookmin University, Seoul, 02707, Republic of Korea.
| | - Gwonhwa Song
- Department of Food and Nutrition, Kookmin University, Seoul, 02707, Republic of Korea.
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6
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Qi J, Li J, Wang Y, Wang W, Zhu Q, He Y, Lu Y, Wu H, Li X, Zhu Z, Ding Y, Xu R, Sun Y. Novel role of CXCL14 in modulating STAR expression in luteinized granulosa cells: implication for progesterone synthesis in PCOS patients. Transl Res 2021; 230:55-67. [PMID: 33129993 DOI: 10.1016/j.trsl.2020.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 10/15/2020] [Accepted: 10/24/2020] [Indexed: 12/19/2022]
Abstract
Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders in reproductive-age women. Reduced progesterone levels are associated with luteal phase deficiency in women with PCOS. The levels of C-X-C motif chemokine ligand-14 (CXCL14) were previously reported to be decreased in human-luteinized granulosa (hGL) cells derived from PCOS patients. However, the function of CXCL14 in hGL cells and whether CXCL14 affects the synthesis of progesterone in hGL cells remain unclear. In the present study, the levels of CXCL14 were reduced in follicular fluid and hGL cells in PCOS patients, accompanied by decreased progesterone levels in follicular fluid and decreased steroidogenic acute regulatory (STAR) expression in hGL cells. CXCL14 administration partially reversed the low progesterone production and STAR expression in hGL cells obtained from PCOS patients. In primary hGL cells, CXCL14 upregulated STAR expression and progesterone production. CXCL14 activated the phosphorylation of cyclic adenosine monophosphate response element-binding protein (CREB) and CREB inhibitor attenuated the modulation of StAR expression by CXCL14. P38 and Jun N-terminal kinase (JNK) pathways were also activated by CXCL14 and inhibition of p38 and JNK attenuated the increase of phosphorylation of CREB, STAR expression and progesterone production caused by CXCL14. Our findings revealed the novel role of CXCL14 in upregulation of STAR expression and progesterone synthesis through CREB phosphorylation via activation of p38 and JNK pathways in hGL cells. This is likely contributing to the dysfunction in steroidogenesis in granulosa cells from PCOS patients.
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Affiliation(s)
- Jia Qi
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Jiaxing Li
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yuan Wang
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Wangsheng Wang
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Qinling Zhu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yaqiong He
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yao Lu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Hasiximuke Wu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Xinyu Li
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Zhenyi Zhu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Ying Ding
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Rui Xu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yun Sun
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China.
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Westrich JA, Vermeer DW, Colbert PL, Spanos WC, Pyeon D. The multifarious roles of the chemokine CXCL14 in cancer progression and immune responses. Mol Carcinog 2020; 59:794-806. [PMID: 32212206 DOI: 10.1002/mc.23188] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 12/13/2022]
Abstract
The chemokine CXCL14 is a highly conserved, homeostatic chemokine that is constitutively expressed in skin epithelia. Responsible for immune cell recruitment and maturation, as well as impacting epithelial cell motility, CXCL14 contributes to the establishment of immune surveillance within normal epithelial layers. Furthermore, CXCL14 is critical to upregulating major histocompatibility complex class I expression on tumor cells. Given these important roles, CXCL14 is often dysregulated in several types of carcinomas including cervical, colorectal, endometrial, and head and neck cancers. Its disruption has been shown to limit critical antitumor immune regulation and is correlated to poor patient prognosis. However, other studies have found that in certain cancers, namely pancreatic and some breast cancers, overexpression of stromal CXCL14 correlates with poor patient survival due to increased invasiveness. Contributing to the ambiguity CXCL14 plays in cancer is that the native CXCL14 receptor remains uncharacterized, although several candidate receptors have been proposed. Despite the complexity of CXCL14 functions, it remains clear that this chemokine is a key regulatory factor in cancer and represents a potential target for future cancer immunotherapies.
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Affiliation(s)
- Joseph A Westrich
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado
| | - Daniel W Vermeer
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, South Dakota
| | - Paul L Colbert
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, South Dakota
| | - William C Spanos
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, South Dakota
| | - Dohun Pyeon
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado.,Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan
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Chaudhury S, Saqibuddin J, Birkett R, Falcon-Girard K, Kraus M, Ernst LM, Grobman W, Mestan KK. Variations in Umbilical Cord Hematopoietic and Mesenchymal Stem Cells With Bronchopulmonary Dysplasia. Front Pediatr 2019; 7:475. [PMID: 31799226 PMCID: PMC6867971 DOI: 10.3389/fped.2019.00475] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 10/29/2019] [Indexed: 12/27/2022] Open
Abstract
Objective: To test the hypothesis that umbilical cord blood-derived CD34+ hematopoietic stem cells (HPSC), cord tissue-derived CD90+ and CD105+ mesenchymal stem cells (MSC) vary with bronchopulmonary dysplasia (BPD). Methods: We conducted a prospective longitudinal study at a large birth center (Prentice Women's Hospital in Chicago, IL). Premature infants (N = 200) were enrolled in 2:1:1 ratio based on gestational age (GA): mildly preterm (31-32 weeks), moderately preterm (29-30 weeks), and extremely preterm (23-28 weeks). Cord blood (CB) and cord tissues (CT) were collected at birth using commercial banking kits, and analyzed for collection blood volume, tissue mass, CD34+, CD90+, CD105+ counts, and concentrations. Multiplex immunoassay was used to measure 12 cytokines and growth factors in CB plasma of 74 patients. BPD severity was defined according to NIH consensus definitions. Univariate and multivariate regression models were used to identify perinatal covariates and assess associations between stem cell concentrations, cytokines, and BPD outcomes. Results: Of 200 patients enrolled (mean GA = 30 ± 2 weeks), 30 developed mild, 24 moderate, and 19 severe BPD. Concentrations of HPSC and MSC, as measured by %CD34+, %CD90+, and %CD105+ of total cells, increased with degree of prematurity. Collection parameters varied with GA, birth weight (BW), gender, prolonged rupture of membranes, mode of delivery, chorioamnionitis, and multiple gestation. Moderate-severe BPD or death was increased with lower GA, BW, Apgar scores, and documented delayed cord clamping. %CD34+ and %CD90+ were increased with BPD and directly correlated with BPD severity. Severe BPD was positively associated with %CD34+ (beta-coefficient = 0.9; 95% CI = 0.4-1.5; P < 0.01) and %CD90+ (beta-coefficient = 0.4; 95% CI = 0.2-0.6; P < 0.001) after adjustment for covariates. CB plasma granulocyte-colony stimulating factor (G-CSF) was inversely associated with %CD90+, and decreased with BPD. Below median G-CSF combined with elevated %CD90+ predicted BPD (positive predictive value = 100%). Conclusions: CB and CT collections yielded high concentrations of HPSCs and MSCs in BPD infants, accompanied by low circulating G-CSF. These variations suggest possible mechanisms by which stem cell differentiation and function predict BPD.
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Affiliation(s)
- Sonali Chaudhury
- Division of Hematology/Stem Cell Transplant, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Juanita Saqibuddin
- Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Robert Birkett
- Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | | | - Morey Kraus
- ViaCord LLC, A Perkin Elmer Company, Cambridge, MA, United States
| | - Linda M Ernst
- Department of Pathology, NorthShore University, Evanston, IL, United States
| | - William Grobman
- Department of Obstetrics & Gynecology and Maternal Fetal Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Karen K Mestan
- Division of Neonatology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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9
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Huang LL, Zhou B, Ai SH, Yang P, Chen YJ, Liu C, Deng YL, Lu Q, Miao XP, Lu WQ, Wang YX, Zeng Q. Prenatal phthalate exposure, birth outcomes and DNA methylation of Alu and LINE-1 repetitive elements: A pilot study in China. CHEMOSPHERE 2018; 206:759-765. [PMID: 29793068 DOI: 10.1016/j.chemosphere.2018.05.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 05/03/2018] [Accepted: 05/04/2018] [Indexed: 05/08/2023]
Abstract
BACKGROUND Epigenetic mechanisms, such as altered DNA methylation, may participate in the relationship between prenatal phthalate exposure and adverse birth outcomes. OBJECTIVE To explore the mediation effect of DNA methylation in the associations of phthalate exposure before delivery with birth outcomes in a Chinese cohort. METHODS Eight phthalate metabolites in maternal urine before delivery and DNA methylation of Alu and long interspersed nucleotide elements (LINE-1) in cord blood were determined among 106 mother-infant pairs. General additive models were used to assess the associations of maternal urinary phthalate metabolites with birth outcomes and DNA methylation; the mediating role of DNA methylation in cord blood was evaluated by mediation analysis. RESULTS We found sex-specific associations between prenatal phthalate exposure and birth outcomes and DNA methylation of cord blood. For example, the molar sum of di-2-(ethylhexyl) phthalate (∑DEHPm) metabolites in maternal urine was positively associated with gestational age among male newborns only (P < 0.05); maternal urinary monobenzyl phthalate (MBzP) was negatively associated with Alu methylation among female newborns only (P < 0.05). Mediation analysis did not find that methylation of Alu and LINE-1 to be a direct mediator in the relationships between maternal urinary phthalate metabolites before delivery and birth outcomes. CONCLUSION Prenatal exposure to certain phthalates was associated with altered birth outcomes and decreased repetitive element methylation of newborns. However, the altered birth outcomes exerted by prenatal phthalate exposure does not seem to be directly mediated through repetitive element methylation in cord blood.
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Affiliation(s)
- Li-Li Huang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Bin Zhou
- Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, WuHan, PR China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Song-Hua Ai
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Pan Yang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Ying-Jun Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Chong Liu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yan-Ling Deng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Qing Lu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Xiao-Ping Miao
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Wen-Qing Lu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yi-Xin Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Qiang Zeng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
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Xu N, Barlow GM, Cui J, Wang ET, Lee B, Akhlaghpour M, Kroener L, Williams J, Rotter JI, Chen YDI, Goodarzi MO, Pisarska MD. Comparison of Genome-Wide and Gene-Specific DNA Methylation Profiling in First-Trimester Chorionic Villi From Pregnancies Conceived With Infertility Treatments. Reprod Sci 2016; 24:996-1004. [PMID: 28090815 DOI: 10.1177/1933719116675056] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Assisted reproductive technologies are associated with altered methylation in term placenta. However, it is unclear whether methylation patterns are the result of fertility treatments or intrauterine environment. Thus, we set out to determine whether there are differences in the first-trimester placenta that may be altered by the underlying fertility treatments. Genome-wide DNA methylation analyses from chorionic villus sampling (CVS) from matched singleton pregnancies conceived using in vitro fertilization (IVF), non-IVF fertility treatment (NIFT), or those conceived spontaneously were performed using Illumina Infinium HumanMethylation450 BeadChip from 15 matched CVS samples. Nanofluidic quantitative polymerase chain reaction (qPCR) of differently methylated genes was performed in a confirmatory cohort of 23 IVF conceptions and 24 NIFT conceptions. RESULTS Global methylation was similar among the IVF, NIFT, and spontaneous conceptions. However, differential methylation from IVF and NIFT pregnancies was present at 34 CpG sites, which was significantly different. Of those, 14 corresponded to known genes, with methylation changes detected at multiple loci in 3 genes, anaphase-promoting complex subunit 2 ( ANAPC2), C-X-C motif chemokine ligand 14 ( CXCL14), and regulating synaptic membrane exocytosis 1 ( RIMS1). Nanofluidic qPCR of differentially methylated genes identified pre T-cell antigen receptor alpha ( PTCRA) to be significantly downregulated in IVF versus NIFT conceptions. CONCLUSION Although global methylation patterns are similar, there are differences in methylation of specific genes in IVF compared to NIFT conceptions, leading to altered gene expression. PTCRA was differentially methylated and downregulated in IVF conceptions, warranting further investigation. It remains to be determined whether these changes affect placentation and whether it is due to the more profound underlying infertility requiring IVF, yet these data provide unique insight into the first-trimester placental epigenome.
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Affiliation(s)
- Ning Xu
- 1 Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Gillian M Barlow
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jinrui Cui
- 1 Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Erica T Wang
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,3 UCLA School of Medicine, Los Angeles, CA, USA
| | - Bora Lee
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Marzieh Akhlaghpour
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Lindsay Kroener
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,3 UCLA School of Medicine, Los Angeles, CA, USA
| | - John Williams
- 3 UCLA School of Medicine, Los Angeles, CA, USA.,4 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jerome I Rotter
- 5 Institute for Translational Genomics and Population Sciences, LA Biomed/Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Yii-der I Chen
- 5 Institute for Translational Genomics and Population Sciences, LA Biomed/Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Mark O Goodarzi
- 1 Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,3 UCLA School of Medicine, Los Angeles, CA, USA
| | - Margareta D Pisarska
- 2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,3 UCLA School of Medicine, Los Angeles, CA, USA
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12
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Joseph R, Poschmann J, Sukarieh R, Too PG, Julien SG, Xu F, Teh AL, Holbrook JD, Ng KL, Chong YS, Gluckman PD, Prabhakar S, Stünkel W. ACSL1 Is Associated With Fetal Programming of Insulin Sensitivity and Cellular Lipid Content. Mol Endocrinol 2015; 29:909-20. [PMID: 25915184 DOI: 10.1210/me.2015-1020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Individuals who are born small for gestational age (SGA) have a risk to develop various metabolic diseases during their life course. The biological memory of the prenatal state of growth restricted individuals may be reflected in epigenetic alterations in stem cell populations. Mesenchymal stem cells (MSCs) from the Wharton's jelly of umbilical cord tissue are multipotent, and we generated primary umbilical cord MSC isolates from SGA and normal neonates, which were subsequently differentiated into adipocytes. We established chromatin state maps for histone marks H3K27 acetylation and H3K27 trimethylation and tested whether enrichment of these marks was associated with gene expression changes. After validating gene expression levels for 10 significant chromatin immunoprecipitation sequencing candidate genes, we selected acyl-coenzyme A synthetase 1 (ACSL1) for further investigations due to its key roles in lipid metabolism. The ACSL1 gene was found to be highly associated with histone acetylation in adipocytes differentiated from MSCs with SGA background. In SGA-derived adipocytes, the ACSL1 expression level was also found to be associated with increased lipid loading as well as higher insulin sensitivity. ACSL1 depletion led to changes in expression of candidate genes such as proinflammatory chemokines and down-regulated both, the amount of cellular lipids and glucose uptake. Increased ACSL1, as well as modulated downstream candidate gene expression, may reflect the obese state, as detected in mice fed a high-fat diet. In summary, we believe that ACSL1 is a programmable mediator of insulin sensitivity and cellular lipid content and adipocytes differentiated from Wharton's jelly MSCs recapitulate important physiological characteristics of SGA individuals.
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Affiliation(s)
- Roy Joseph
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Jeremie Poschmann
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Rami Sukarieh
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Peh Gek Too
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Sofi G Julien
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Feng Xu
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Ai Ling Teh
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Joanna D Holbrook
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Kai Lyn Ng
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Yap Seng Chong
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Peter D Gluckman
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Shyam Prabhakar
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
| | - Walter Stünkel
- Singapore Institute for Clinical Sciences (R.J., R.S., P.G.T., S.G.J., F.X., A.L.T., J.D.H., Y.S.C., P.D.G., W.S.), Agency for Science, Technology and Research, Singapore 117609; Genome Institute of Singapore (J.P., S.P.), Agency for Science, Technology and Research, Singapore 138672; Department of Obstetrics and Gynaecology (K.L.N., Y.S.C.), Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228; and Liggins Institute (P.D.G.), University of Auckland, Auckland 1142, New Zealand
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