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Bondar G, Mahapatra AD, Bao TM, Silacheva I, Hairapetian A, Vu T, Su S, Katappagari A, Galan L, Chandran J, Adamov R, Mancusi L, Lai I, Rahman A, Grogan T, Hsu JJ, Cappelletti M, Ping P, Elashoff D, Reed EF, Deng MC. An Exercise Immune Fitness Test to Unravel Disease Mechanisms-A Proof-of-Concept Heart Failure Study. J Clin Med 2024; 13:3200. [PMID: 38892912 PMCID: PMC11172881 DOI: 10.3390/jcm13113200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Background: Cardiorespiratory fitness positively correlates with longevity and immune health. Regular exercise may provide health benefits by reducing systemic inflammation. In chronic disease conditions, such as chronic heart failure and chronic fatigue syndrome, mechanistic links have been postulated between inflammation, muscle weakness, frailty, catabolic/anabolic imbalance, and aberrant chronic activation of immunity with monocyte upregulation. We hypothesize that (1) temporal changes in transcriptome profiles of peripheral blood mononuclear cells during strenuous acute bouts of exercise using cardiopulmonary exercise testing are present in adult subjects, (2) these temporal dynamic changes are different between healthy persons and heart failure patients and correlate with clinical exercise-parameters and (3) they portend prognostic information. Methods: In total, 16 Heart Failure (HF) patients and 4 healthy volunteers (HV) were included in our proof-of-concept study. All participants underwent upright bicycle cardiopulmonary exercise testing. Blood samples were collected at three time points (TP) (TP1: 30 min before, TP2: peak exercise, TP3: 1 h after peak exercise). We divided 20 participants into 3 clinically relevant groups of cardiorespiratory fitness, defined by peak VO2: HV (n = 4, VO2 ≥ 22 mL/kg/min), mild HF (HF1) (n = 7, 14 < VO2 < 22 mL/kg/min), and severe HF (HF2) (n = 9, VO2 ≤ 14 mL/kg/min). Results: Based on the statistical analysis with 20-100% restriction, FDR correction (p-value 0.05) and 2.0-fold change across the three time points (TP1, TP2, TP3) criteria, we obtained 11 differentially expressed genes (DEG). Out of these 11 genes, the median Gene Expression Profile value decreased from TP1 to TP2 in 10 genes. The only gene that did not follow this pattern was CCDC181. By performing 1-way ANOVA, we identified 8/11 genes in each of the two groups (HV versus HF) while 5 of the genes (TTC34, TMEM119, C19orf33, ID1, TKTL2) overlapped between the two groups. We found 265 genes which are differentially expressed between those who survived and those who died. Conclusions: From our proof-of-concept heart failure study, we conclude that gene expression correlates with VO2 peak in both healthy individuals and HF patients, potentially by regulating various physiological processes involved in oxygen uptake and utilization during exercise. Multi-omics profiling may help identify novel biomarkers for assessing exercise capacity and prognosis in HF patients, as well as potential targets for therapeutic intervention to improve VO2 peak and quality of life. We anticipate that our results will provide a novel metric for classifying immune health.
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Affiliation(s)
- Galyna Bondar
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | | | - Tra-Mi Bao
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Irina Silacheva
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Adrian Hairapetian
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Thomas Vu
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Stephanie Su
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Ananya Katappagari
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Liana Galan
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Joshua Chandran
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Ruben Adamov
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Lorenzo Mancusi
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Isabel Lai
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Anca Rahman
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Tristan Grogan
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Jeffrey J. Hsu
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Monica Cappelletti
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Peipei Ping
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - David Elashoff
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Elaine F. Reed
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
| | - Mario C. Deng
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA; (G.B.); (T.-M.B.); (I.S.); (A.H.); (T.V.); (S.S.); (A.K.); (L.G.); (J.C.); (R.A.); (L.M.); (I.L.); (A.R.); (T.G.); (J.J.H.); (M.C.); (P.P.); (D.E.); (E.F.R.)
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Zhang B, Liu T, Gu Y, Ren L, Wang J, Feng C, Song Z. Long Non-Coding RNA LPP-AS2 Plays an Anti-Tumor Role in Thyroid Carcinoma by Regulating the miR-132-3p/OLFM1 Axis. Crit Rev Eukaryot Gene Expr 2023; 33:73-86. [PMID: 37199315 DOI: 10.1615/critreveukaryotgeneexpr.v33.i5.70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The cancer-promoting function of the long non-coding RNA (lncRNA) LPP-AS2 has been documented in different cancers. Nonetheless, its role in thyroid carcinoma (THCA) remains unestablished. Reverse transcription quantitative polymerase chain reaction and Western blotting were conducted to estimate the expressions of lncRNA LPP-AS2, miR-132-3p, and OLFM1. The THCA cells' functions were assessed through CCK8 assays, Transwell invasion assays, scratch wound-healing migration assays, and quantification of caspase-3 activity. The in vivo assays were also implemented to assess tumor growth. Luciferase reporter and RNA immuno-precipitation assay (RIPA) experiments were executed to elucidate the interactions of miR-132-3p with lncRNA LPP-AS2 and OLFM1. THCA tissues and cells exhibited poor lncRNA LPP-AS2 and OLFM1 expressions and a robust expression of miR-132-3p. Overexpressing lncRNA LPP-AS2 constrained THCA cell proliferation, migration, and invasion and improved caspase-3 activity. The anti-tumor function of lncRNA LPP-AS2 was also validated in vivo. miR-132-3p had an interplay with lncRNA LPP-AS2 and OLFM1. Functionally, overexpressing miR-132-3p promoted the malignant THCA cell phenotypes. However, that tumor promotion was abolished by the additional overexpression of lncRNA LPP-AS2. The in vitro experiments also demonstrated that the repressive effect of OLFM1 overexpression on THCA cell malignant action could be offset by the miR-132-3p mimic. lncRNA LPP-AS2 impedes THCA progression via the miR-132-3p/OLFM1 axis. Our findings contribute a potential strategy in interfering with THCA progression.
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Affiliation(s)
- Bowei Zhang
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Tong Liu
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Yi Gu
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Li Ren
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Jinju Wang
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Chao Feng
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
| | - Zhe Song
- Department of Vascular and Thyroid Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan, China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, Sichuan, China
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Dietary Habit Is Associated with Depression and Intelligence: An Observational and Genome-Wide Environmental Interaction Analysis in the UK Biobank Cohort. Nutrients 2021; 13:nu13041150. [PMID: 33807197 PMCID: PMC8067152 DOI: 10.3390/nu13041150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/26/2021] [Accepted: 03/27/2021] [Indexed: 12/19/2022] Open
Abstract
Dietary habits have considerable impact on brain development and mental health. Despite long-standing interest in the association of dietary habits with mental health, few population-based studies of dietary habits have assessed depression and fluid intelligence. Our aim is to investigate the association of dietary habits with depression and fluid intelligence. In total, 814 independent loci were utilized to calculate the individual polygenic risk score (PRS) for 143 dietary habit-related traits. The individual genotype data were obtained from the UK Biobank cohort. Regression analyses were then conducted to evaluate the association of dietary habits with depression and fluid intelligence, respectively. PLINK 2.0 was utilized to detect the single nucleotide polymorphism (SNP) × dietary habit interaction effect on the risks of depression and fluid intelligence. We detected 22 common dietary habit-related traits shared by depression and fluid intelligence, such as red wine glasses per month, and overall alcohol intake. For interaction analysis, we detected that OLFM1 interacted with champagne/white wine in depression, while SYNPO2 interacted with coffee type in fluid intelligence. Our study results provide novel useful information for understanding how eating habits affect the fluid intelligence and depression.
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El Zowalaty AE, Li R, Chen W, Ye X. Seipin deficiency leads to increased endoplasmic reticulum stress and apoptosis in mammary gland alveolar epithelial cells during lactation. Biol Reprod 2019; 98:570-578. [PMID: 29236949 DOI: 10.1093/biolre/iox169] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 12/10/2017] [Indexed: 02/06/2023] Open
Abstract
Seipin is an integral endoplasmic reticulum (ER) membrane protein encoded by Berardinelli-Seip congenital lipodystrophy type 2 (BSCL2/Bscl2) gene. Most litters (59%) from Bscl2-/- dams mated with wild type (WT) (Bscl2+/+) males did not survive postnatal day 5 (PND5) and pups (Bscl2+/-) lacked milk in their stomachs. The survived litters had reduced pup survival rate at PND21. It was hypothesized that seipin was critical for lactation. Bscl2 was upregulated and highly detected in the lactation day 1 (LD1) WT mammary gland alveolar epithelial cells. LD1 Bscl2-/- mammary glands lacked adipocytes and alveolar clusters and had varied alveolar morphology: from interconnected mammary gland alveoli with dilated lumen and sloughed epithelial cells to undifferentiated mammary gland alveoli with unexpanded lumen. Comparable levels of whey acidic protein (WAP, a major component in rodent milk) staining and Nile Red lipid droplet staining between WT and Bscl2-/- LD1 alveolar epithelial cells indicated normal milk protein synthesis and lipid syntheses in LD1 Bscl2-/- mammary glands. Significantly reduced percentage of larger lipid droplets was detected in LD1 Bscl2-/- alveoli with unexpanded lumen. There was no obviously impaired proliferation detected by PCNA staining but increased apoptosis detected by cleaved caspase-3 staining in LD1 Bscl2-/- alveolar epithelial cells. Increased expression of protein disulfide isomerase and binding immunoglobulin protein in the LD1 Bscl2-/- mammary gland alveolar epithelial cells indicated increased ER stress. This study demonstrates increased ER stress and apoptosis in LD1 Bscl2-/- mammary gland alveolar epithelial cells and reveals a novel in vivo function of seipin in lactation.
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Affiliation(s)
- Ahmed E El Zowalaty
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia, USA
| | - Rong Li
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia, USA
| | - Weiqin Chen
- Department of Physiology, Augusta University, Augusta, Georgia, USA
| | - Xiaoqin Ye
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia, USA
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Zowalaty AEE, Ye X. Seipin deficiency leads to defective parturition in mice. Biol Reprod 2018; 97:378-386. [PMID: 29088395 DOI: 10.1093/biolre/iox088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/10/2017] [Indexed: 01/28/2023] Open
Abstract
Seipin is an integral endoplasmic reticulum membrane protein encoded by Berardinelli-Seip congenital lipodystrophy type 2 (BSCL2/Bscl2) gene. Seipin deficiency results in lipodystrophy, diabetes, muscle hypertrophy, and male infertility in both human and mouse. Seipin function in female reproduction is unknown. Bscl2-/- dams had normal embryo implantation and body weight gain during pregnancy but reduced delivery rates from 2nd to 4th pregnancies and reduced numbers of pups delivered from 1st to 4th pregnancies. Characterization of first pregnancy revealed increased gestation period and parturition problems, including uterine prolapse, difficulty in delivery, undelivered fetuses, and undelivered tissues in Bscl2-/- females. Bscl2-/- uterine weight was comparable to control at 3 weeks old but significantly increased with myometrial hypertrophy at 10 months old. In situ hybridization revealed relatively low level of Bscl2 mRNA expression in myometrium throughout pregnancy and postpartum but high level of expression in uterine luminal epithelium, suggesting that systemic effect (e.g. elevated glucose and insulin levels) rather than local seipin-deficiency in myometrium might be a main contributing factor to myometrial hypertrophy. On near-term gestation day 18.5 (D18.5), Bscl2-/- females had normal levels of serum progesterone and 17β-estradiol, indicating functional ovary and placenta. Proliferating Cell Nuclear Antigen (PCNA) staining showed minimal myometrial cell proliferation in both D18.5 Bscl2+/+ and Bscl2-/- uteri. There was strong LC3 immunostaining in Bscl2+/+ and Bscl2-/- peripartum myometrium and increased LC3 staining in Bscl2-/- peripartum uterine luminal epithelium, suggesting a potential role of seipin in regulating autophagy in uterine luminal epithelium but not myometrium. This study demonstrates an association of seipin with myometrium and parturition.
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Affiliation(s)
- Ahmed E El Zowalaty
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America.,Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia, United States of America
| | - Xiaoqin Ye
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America.,Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia, United States of America
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Xiao S, Li R, El Zowalaty AE, Diao H, Zhao F, Choi Y, Ye X. Acidification of uterine epithelium during embryo implantation in mice. Biol Reprod 2017; 96:232-243. [PMID: 28395338 DOI: 10.1095/biolreprod.116.144451] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 11/22/2016] [Indexed: 12/31/2022] Open
Abstract
Uterine luminal epithelium (LE) is essential for establishing uterine receptivity. Previous microarray analysis revealed upregulation of Atp6v0d2 in gestation day 4.5 (D4.5) LE in mice. Realtime PCR showed upregulation of uterine Atp6v0d2 starting right before embryo attachment ∼D4.0. In situ hybridization demonstrated specific uterine localization of Atp6v0d2 in LE upon embryo implantation. Atp6v0d2 encodes one subunit for vacuolar-type H+-ATPase (V-ATPase), which regulates acidity of intracellular organelles and extracellular environment. LysoSensor Green DND-189 detected acidic signals in LE and glandular epithelium upon embryo implantation, correlating with Atp6v0d2 upregulation in early pregnant uterus. Atp6v0d2-/- females had significantly reduced implantation rate and marginally reduced delivery rate from first mating only, but comparable number of implantation sites and litter size compared to control and comparable fertility to control from subsequent matings, suggesting a nonessential role of Atp6v0d2 subunit in embryo implantation. Successful implantation in both control and Atp6v0d2-/- females was associated with uterine epithelial acidification. No significant compensatory upregulation of Atp6v0d1 mRNA was detected in D4.5 Atp6v0d2-/- uteri. To determine the role of V-ATPase instead of a single subunit in embryo implantation, a specific V-ATPase inhibitor bafilomycin A1 (2.5 μg/kg) was injected via uterine fat pad on D3 18:00 h. This treatment resulted in reduced uterine epithelial acidification, delayed implantation, and reduced number of implantation sites. It also suppressed oil-induced artificial decidualization. These data demonstrate uterine epithelial acidification as a novel phenomenon during embryo implantation and V-ATPase is involved in uterine epithelial acidification and uterine preparation for embryo implantation.
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Affiliation(s)
- Shuo Xiao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA
| | - Rong Li
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA
| | - Ahmed E El Zowalaty
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA
| | - Honglu Diao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Reproductive Medical Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei 442000, China
| | - Fei Zhao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA
| | - Yongwon Choi
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Xiaoqin Ye
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.,Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA
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El Zowalaty AE, Li R, Zheng Y, Lydon JP, DeMayo FJ, Ye X. Deletion of RhoA in Progesterone Receptor-Expressing Cells Leads to Luteal Insufficiency and Infertility in Female Mice. Endocrinology 2017; 158:2168-2178. [PMID: 28498971 PMCID: PMC5505209 DOI: 10.1210/en.2016-1796] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 05/08/2017] [Indexed: 12/22/2022]
Abstract
Ras homolog gene family, member A (RhoA) is widely expressed throughout the female reproductive system. To assess its role in progesterone receptor-expressing cells, we generated RhoA conditional knockout mice RhoAd/d (RhoAf/f-Pgr-Cre+/-). RhoAd/d female mice had comparable mating activity, serum luteinizing hormone, prolactin, and estradiol levels and ovulation with control but were infertile with progesterone insufficiency, indicating impaired steroidogenesis in RhoAd/d corpus luteum (CL). RhoA was highly expressed in wild-type luteal cells and conditionally deleted in RhoAd/d CL. Gestation day 3.5 (D3.5) RhoAd/d ovaries had reduced numbers of CL, less defined corpus luteal cord formation, and disorganized CL collagen IV staining. RhoAd/d CL had lipid droplet and free cholesterol accumulation, indicating the availability of cholesterol for steroidogenesis, but disorganized β-actin and vimentin staining, indicating disrupted cytoskeleton integrity. Cytoskeleton is important for cytoplasmic cholesterol movement to mitochondria and for regulating mitochondria. Dramatically reduced expression of mitochondrial markers heat shock protein 60 (HSP60), voltage-dependent anion channel, and StAR was detected in RhoAd/d CL. StAR carries out the rate-limiting step of steroidogenesis. StAR messenger RNA expression was reduced in RU486-treated D3.5 wild-type CL and tended to be induced in progesterone-treated D3.5 RhoAd/d CL, with parallel changes of HSP60 expression. These data demonstrated the in vivo function of RhoA in CL luteal cell cytoskeleton integrity, cholesterol transport, StAR expression, and progesterone synthesis, and a positive feedback on StAR expression in CL by progesterone signaling. These findings provide insights into mechanisms of progesterone insufficiency.
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Affiliation(s)
- Ahmed E. El Zowalaty
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602
- Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia 30602
| | - Rong Li
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602
- Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia 30602
| | - Yi Zheng
- Division of Experimental Hematology and Cancer Biology, Children’s Hospital Research Foundation, Cincinnati, Ohio 45229
| | - John P. Lydon
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030
| | - Francesco J. DeMayo
- Reproductive and Developmental Biology Laboratory/Pregnancy and Female Reproduction Group, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709
| | - Xiaoqin Ye
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602
- Interdisciplinary Toxicology Program, University of Georgia, Athens, Georgia 30602
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Mutated olfactomedin 1 in the interphotoreceptor matrix of the mouse retina causes functional deficits and vulnerability to light damage. Histochem Cell Biol 2016; 147:453-469. [PMID: 27787612 DOI: 10.1007/s00418-016-1510-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2016] [Indexed: 12/24/2022]
Abstract
Olfactomedin 1 (OLFM1) is a secreted glycoprotein and member of the olfactomedin protein family, which is preferentially expressed in various areas throughout the central nervous system. To learn about the functional properties of OLFM1 in the eye, we investigated its localization in the mouse and pig eye. In addition, we analyzed the ocular phenotype of Olfm1 mutant mice in which 52 amino acids were deleted in the central part (M2 region) of OLFM1. OLFM1 was detected in cornea, sclera, retina, and optic nerve of both wild-type and Olfm1 mutant littermates. By immunohistochemistry and double labeling with the lectin peanut agglutinin, OLFM1 was found in the interphotoreceptor matrix (IPM) of mouse and pig retina where it was directly localized to the inner segments of photoreceptors. Western blotting confirmed the presence of the OLFM1 isoforms pancortin 1 (BMY) and pancortin 2 (BMZ) in the IPM. The retinal phenotype of Olfm1 mutant mice did not obviously differ from that of wild-type littermates. In addition, outer nuclear layer (ONL) and total retinal thickness were not different, and the same was true for the area of the optic nerve in cross sections. Functional changes were observed though by electroretinography, which showed significantly lower a- and b-wave amplitudes in Olfm1 mutant mice when compared to age-matched wild-type mice. When light damage experiments were performed as an experimental paradigm of photoreceptor apoptosis, significantly more TUNEL-positive cells were observed in Olfm1 mutant mice 30 h after light exposure. One week after light exposure, the ONL was significantly thinner in Olfm1 mutant mice than in wild-type littermates indicating increased photoreceptor loss. No differences were observed when rhodopsin turnover or ERK1/2 signaling was investigated. We conclude that OLFM1 is a newly identified IPM molecule that serves an important role for photoreceptor homeostasis, which is significantly compromised in the eyes of Olfm1 mutant mice.
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Novel function of LHFPL2 in female and male distal reproductive tract development. Sci Rep 2016; 6:23037. [PMID: 26964900 PMCID: PMC4786858 DOI: 10.1038/srep23037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 02/29/2016] [Indexed: 01/04/2023] Open
Abstract
Congenital reproductive tract anomalies could impair fertility. Female and male reproductive tracts are developed from Müllerian ducts and Wolffian ducts, respectively, involving initiation, elongation and differentiation. Genetic basis solely for distal reproductive tract development is largely unknown. Lhfpl2 (lipoma HMGIC fusion partner-like 2) encodes a tetra-transmembrane protein with unknown functions. It is expressed in follicle cells of ovary and epithelial cells of reproductive tracts. A spontaneous point mutation of Lhfpl2 (LHFPL2G102E) leads to infertility in 100% female mice, which have normal ovarian development, ovulation, uterine development, and uterine response to exogenous estrogen stimulation, but abnormal upper longitudinal vaginal septum and lower vaginal agenesis. Infertility is also observed in ~70% mutant males, which have normal mating behavior and sperm counts, but abnormal distal vas deferens convolution resulting in complete and incomplete blockage of reproductive tract in infertile and fertile males, respectively. On embryonic day 15.5, mutant Müllerian ducts and Wolffian ducts have elongated but their duct tips are enlarged and fail to merge with the urogenital sinus. These findings provide a novel function of LHFPL2 and a novel genetic basis for distal reproductive tract development; they also emphasize the importance of an additional merging phase for proper reproductive tract development.
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