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Kurdi C, Schmidt J, Horváth-Szalai Z, Mauchart P, Gödöny K, Várnagy Á, Kovács GL, Kőszegi T. Follicular Fluid Proteomic Analysis of Women Undergoing Assisted Reproduction Suggests That Apolipoprotein A1 Is a Potential Fertility Marker. Int J Mol Sci 2023; 25:486. [PMID: 38203658 PMCID: PMC10778837 DOI: 10.3390/ijms25010486] [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: 11/26/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Infertility affects millions worldwide, posing a significant global health challenge. The proteomic analysis of follicular fluid provides a comprehensive view of the complex molecular landscape within ovarian follicles, offering valuable information on the factors influencing oocyte development and on the overall reproductive health. The follicular fluid is derived from the plasma and contains various proteins that can have different roles in oocyte health and infertility, and this fluid is a critical microenvironment for the developing oocytes as well. Using the high-performance liquid chromatography-mass spectrometry method, we investigated the protein composition of the follicular fluid, and after classification, we carried out relative quantification of the identified proteins in the pregnant (P) and non-pregnant (NP) groups. Based on the protein-protein interaction analysis, albumin and apolipoprotein A1 (ApoA1) were found to be hub proteins, and the quantitative comparison of the P and NP groups resulted in a significantly lower concentration of ApoA1 and high-density lipoprotein cholesterol in the P group. As both molecules are involved in the cholesterol transport, we also investigated their role in the development of oocytes and in the prediction of fertility.
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Affiliation(s)
- Csilla Kurdi
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary; (C.K.)
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
| | - János Schmidt
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Zoltán Horváth-Szalai
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary; (C.K.)
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Péter Mauchart
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Krisztina Gödöny
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Ákos Várnagy
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Gábor L. Kovács
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary; (C.K.)
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
| | - Tamás Kőszegi
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Hungary; (C.K.)
- Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
- National Laboratory on Human Reproduction, University of Pécs, 7624 Pécs, Hungary (Á.V.)
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Charles-Schoeman C, Wang J, Shahbazian A, Wilhalme H, Brook J, Kaeley GS, Oganesian B, Ben-Artzi A, Elashoff DA, Ranganath VK. Power doppler ultrasound signal predicts abnormal HDL function in patients with rheumatoid arthritis. Rheumatol Int 2023; 43:1041-1053. [PMID: 36828925 PMCID: PMC10125943 DOI: 10.1007/s00296-023-05285-7] [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: 10/24/2022] [Accepted: 01/31/2023] [Indexed: 02/26/2023]
Abstract
Active rheumatoid arthritis (RA) is associated with increased cardiovascular risk and impaired function of high-density lipoprotein (HDL). Previous work suggests that HDL may become dysfunctional through oxidative modifications within the RA joint. The current work evaluates an association of synovial power doppler ultrasound signal (PDUS) with HDL function and structure. Two open-label clinical therapeutic studies using PDUS as a disease outcome measure were included in this analysis, including a 12-month trial of subcutaneous abatacept in 24 RA patients and a 6-month trial of IV tocilizumab in 46 RA patients. Laboratory assays included assessments of HDL function and structure, HDL and total cholesterol levels, and a cytokine/chemokine panel. Patients with the highest baseline PDUS scores in both clinical studies, had worse HDL function, including suppression of paraoxonase 1 (PON1) activity as well as lower HDL-C levels. Associations between other disease assessments (DAS28 and CDAI) and HDL function/structure were noted but were generally of lesser magnitude and consistency than PDUS across the HDL profile. Treatment with tocilizumab for 6 months was associated with increases in cholesterol levels and improvements in the HDL function profile, which correlated with greater decreases in PDUS scores. Similar trends were noted following treatment with abatacept for 3 months. Higher baseline PDUS scores identified patients with worse HDL function. This data supports previous work suggesting a direct association of joint inflammation with abnormal HDL function.
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Affiliation(s)
- Christina Charles-Schoeman
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA.
| | - Jennifer Wang
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Ani Shahbazian
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Holly Wilhalme
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Jenny Brook
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Gurjit S Kaeley
- Division of Rheumatology and Clinical Immunology, College of Medicine, University of Florida, Jacksonville, FL, USA
| | - Buzand Oganesian
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Ami Ben-Artzi
- Division of Rheumatology, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - David A Elashoff
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
| | - Veena K Ranganath
- David Geffen School of Medicine, University of California, 1000 Veteran Ave, Rm 32-59, Los Angeles, CA, 90095, USA
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Liu T, Qu J, Tian M, Yang R, Song X, Li R, Yan J, Qiao J. Lipid Metabolic Process Involved in Oocyte Maturation During Folliculogenesis. Front Cell Dev Biol 2022; 10:806890. [PMID: 35433675 PMCID: PMC9009531 DOI: 10.3389/fcell.2022.806890] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 03/03/2022] [Indexed: 11/25/2022] Open
Abstract
Oocyte maturation is a complex and dynamic process regulated by the coordination of ovarian cells and numerous extraovarian signals. From mammal studies, it is learnt that lipid metabolism provides sufficient energy for morphological and cellular events during folliculogenesis, and numerous lipid metabolites, including cholesterol, lipoproteins, and 14-demethyl-14-dehydrolanosterol, act as steroid hormone precursors and meiotic resumption regulators. Endogenous and exogenous signals, such as gonadotropins, insulin, and cortisol, are the upstream regulators in follicular lipid metabolic homeostasis, forming a complex and dynamic network in which the key factor or pathway that plays the central role is still a mystery. Though lipid metabolites are indispensable, long-term exposure to a high-fat environment will induce irreversible damage to follicular cells and oocyte meiosis. This review specifically describes the transcriptional expression patterns of several lipid metabolism–related genes in human oocytes and granulosa cells during folliculogenesis, illustrating the spatiotemporal lipid metabolic changes in follicles and the role of lipid metabolism in female reproductive capacity. This study aims to elaborate the impact of lipid metabolism on folliculogenesis, thus providing guidance for improving the fertility of obese women and the clinical outcome of assisted reproduction.
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Affiliation(s)
- Tao Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Jiangxue Qu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Mengyuan Tian
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Rui Yang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Xueling Song
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Rong Li
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
| | - Jie Yan
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
- *Correspondence: Jie Yan,
| | - Jie Qiao
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
- National Clinical Research Center for Obstetrics and Gynecology, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction, Beijing, China
- Research Units of Comprehensive Diagnosis and Treatment of Oocyte Maturation Arrest, Chinese Academy of Medical Sciences, Beijing, China
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Gaglione R, Pizzo E, Notomista E, de la Fuente-Nunez C, Arciello A. Host Defence Cryptides from Human Apolipoproteins: Applications in Medicinal Chemistry. Curr Top Med Chem 2021; 20:1324-1337. [PMID: 32338222 DOI: 10.2174/1568026620666200427091454] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
Abstract
Several eukaryotic proteins with defined physiological roles may act as precursors of cryptic bioactive peptides released upon protein cleavage by the host and/or bacterial proteases. Based on this, the term "cryptome" has been used to define the unique portion of the proteome encompassing proteins with the ability to generate bioactive peptides (cryptides) and proteins (crypteins) upon proteolytic cleavage. Hence, the cryptome represents a source of peptides with potential pharmacological interest. Among eukaryotic precursor proteins, human apolipoproteins play an important role, since promising bioactive peptides have been identified and characterized from apolipoproteins E, B, and A-I sequences. Human apolipoproteins derived peptides have been shown to exhibit antibacterial, anti-biofilm, antiviral, anti-inflammatory, anti-atherogenic, antioxidant, or anticancer activities in in vitro assays and, in some cases, also in in vivo experiments on animal models. The most interesting Host Defence Peptides (HDPs) identified thus far in human apolipoproteins are described here with a focus on their biological activities applicable to biomedicine. Altogether, reported evidence clearly indicates that cryptic peptides represent promising templates for the generation of new drugs and therapeutics against infectious diseases.
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Affiliation(s)
- Rosa Gaglione
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy
| | - Elio Pizzo
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Eugenio Notomista
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Angela Arciello
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy.,Istituto Nazionale di Biostrutture e Biosistemi (INBB), 00136 Rome, Italy
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Vázquez-Moreno M, Locia-Morales D, Perez-Herrera A, Gomez-Diaz RA, Gonzalez-Dzib R, Valdez-González AL, Flores-Alfaro E, Corona-Salazar P, Suarez-Sanchez F, Gomez-Zamudio J, Valladares-Salgado A, Wacher-Rodarte N, Cruz M, Meyre D. Causal Association of Haptoglobin With Obesity in Mexican Children: A Mendelian Randomization Study. J Clin Endocrinol Metab 2020; 105:5822684. [PMID: 32309857 DOI: 10.1210/clinem/dgaa213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 04/16/2020] [Indexed: 12/16/2022]
Abstract
CONTEXT Little is known about the association between haptoglobin level and cardiometabolic traits. A previous genome-wide association study identified rs2000999 in the HP gene as the stronger genetic contributor to serum haptoglobin level in European populations. OBJECTIVE AND DESIGN We investigated the association of HP rs2000999 with serum haptoglobin and childhood and adult obesity in up to 540/697 and 592/691 Mexican cases and controls, respectively. Anthropometric and biochemical data were collected. Serum haptoglobin was measured by an immunoturbidimetry assay. HP rs2000999 was genotyped using the TaqMan technology. Mendelian randomization analysis was performed using the Wald and inverse variance weighting methods. RESULTS Haptoglobin level was positively associated with childhood and adult obesity. HP rs2000999 G allele was positively associated with haptoglobin level in children and adults. HP rs2000999 G allele was positively associated with childhood but not adult obesity. The association between HP rs2000999 and childhood obesity was removed after adjusting for haptoglobin level. In a Mendelian randomization analysis, haptoglobin level genetically predicted by HP rs2000999 showed a significant causal effect on childhood obesity by the Wald and inverse variance weighting methods. CONCLUSION Our data provide evidence for the first time for a causal positive association between serum haptoglobin level and childhood obesity in the Mexican population. Our study contributes to the genetic elucidation of childhood obesity and proposes haptoglobin as an important biomarker and treatment target for obesity.
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Affiliation(s)
- Miguel Vázquez-Moreno
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Daniel Locia-Morales
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
- Laboratorio de Investigación en Epidemiología Clínica y Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, 39090, Mexico
| | - Aleyda Perez-Herrera
- Consejo Nacional de Ciencia y Tecnología, Instituto Politécnico Nacional-Centro Interdisciplinario de Investigación para el Desarrollo Integral-Regional Unidad Oaxaca, Oaxaca, Mexico
| | - Rita A Gomez-Diaz
- Unidad de Investigación en Epidemiología Clínica, Hospital de Especialidades Bernardo Sepúlveda, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Roxana Gonzalez-Dzib
- Servicio de Prestaciones Médicas del Instituto Mexicano del Seguro Social, Delegación Campeche, Campeche, Mexico
| | - Adriana L Valdez-González
- Unidad de Investigación en Epidemiología Clínica, Hospital de Especialidades Bernardo Sepúlveda, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Eugenia Flores-Alfaro
- Laboratorio de Investigación en Epidemiología Clínica y Molecular, Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, Chilpancingo, Guerrero, 39090, Mexico
| | - Perla Corona-Salazar
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Fernando Suarez-Sanchez
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Jaime Gomez-Zamudio
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Adan Valladares-Salgado
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Niels Wacher-Rodarte
- Unidad de Investigación en Epidemiología Clínica, Hospital de Especialidades Bernardo Sepúlveda, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Miguel Cruz
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI del Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - David Meyre
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
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Suarez-Sanchez F, Vazquez-Moreno M, Herrera-Lopez E, Gomez-Zamudio JH, Peralta-Romero JJ, Castelan-Martinez OD, Cruz M, Parra EJ, Valladares-Salgado A. Association of rs2000999 in the haptoglobin gene with total cholesterol, HDL-C, and LDL-C levels in Mexican type 2 diabetes patients. Medicine (Baltimore) 2019; 98:e17298. [PMID: 31574854 PMCID: PMC6775401 DOI: 10.1097/md.0000000000017298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Recently, studies have shown significant association between the rs2000999 polymorphism in the haptoglobin-encoding gene (HP) and low-density lipoprotein cholesterol (LDL-C) and total cholesterol (TC) levels, which are important risk factors for cardiovascular diseases. However, the association of rs2000999 with serum lipids in Latin American diabetic populations is still uncharacterized. Here, we analyzed the association of rs2000999 with TC, high-density lipoprotein cholesterol (HDL-C), and LDL-C levels in 546 Mexican adults with type 2 diabetes (T2D) and in 654 controls without T2D. In this observational case-control study we included adults from 4 centers of the Mexican Social Security Institute in Mexico City recruited from 2012 to 2015. TC, HDL-C, LDL-C, triglycerides (TG), and glucose levels were measured by an enzymatic colorimetric method. The variant rs2000999 was genotyped using TaqMan real time polymerase chain reaction. The percentage of Native-American ancestry showed a negative association with the rs2000999 A allele. In contrast, the rs2000999 A allele had a strong positive association with European ancestry, and to a lesser extent, with African ancestry. Linear regression was used to estimate the association between the variant rs2000999 and lipid concentrations, using different genetic models. Under codominant and recessive models, rs2000999 was significantly associated with TC and LDL-C levels in the T2D group and in controls without T2D. In addition, the group with T2D showed a significant association between the variant and HDL-C levels. In summary, the rs2000999 A allele in Mexican population is positively associated with the percentage of European and negatively associated with Native American ancestry. Carriers of the A allele have increased levels of TC and LDL-C, independently of T2D diagnosis, and also increased concentrations of HDL-C in the T2D sample.
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Affiliation(s)
- Fernando Suarez-Sanchez
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | - Miguel Vazquez-Moreno
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | - Ema Herrera-Lopez
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | - Jaime H. Gomez-Zamudio
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | - José J. Peralta-Romero
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | | | - Miguel Cruz
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
| | - Esteban J. Parra
- Department of Anthropology, University of Toronto at Mississauga, Mississauga, ON, Canada
| | - Adan Valladares-Salgado
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social
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7
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Awadallah S, Madkour M, Hamidi RA, Alwafa EA, Hattab M, Zakkour B, Al-Matroushi A, Ahmed E, Al-Kitbi M. Plasma levels of Apolipoprotein A1 and Lecithin:Cholesterol Acyltransferase in type 2 diabetes mellitus: Correlations with haptoglobin phenotypes. Diabetes Metab Syndr 2017; 11 Suppl 2:S543-S546. [PMID: 28416369 DOI: 10.1016/j.dsx.2017.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/05/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND Previous studies have demonstrated that hemoglobin-haptoglobin (Hb-Hp) complex plays a role in developing vascular complications in type 2 diabetes mellitus (T2DM). The complexes bind with Apolipoprotein A1 (ApoA1) of high-density lipoprotein (HDL), affecting the function of Lecithin:Cholesterol Acyltransferase (LCAT), and impairing the reverse cholesterol transport mechanism (RCT). This study investigated the influence of Hp phenotypes on serum levels of ApoA1 and LCAT in patients with T2DM. METHODS The study comprised 131 T2DM patients and 111 matching healthy controls. Fasting blood glucose, HbA1C, and lipid profile were determined by chemistry autoanalyzer, LCAT and ApoA1 by ELISA, and Hp phenotypes by gel electrophoresis. RESULTS Irrespective of Hp phenotypes, fasting blood glucose, HbA1C, and lipid profile were significantly higher in patients than in controls, while HDL-cholesterol, ApoA1, and LCAT were lower. ApoA1 correlated positively with LCAT (r=0.223, p=0.024) and HDL-cholesterol (r=0.255, 0.003) in patients only. When Hp polymorphism was taken into account, the levels of LCAT and ApoA1 were significantly lower in patients with Hp2-2 than that in patients of Hp1-1 and/or Hp2-1. Correlations between ApoA1 and each of HDL-cholesterol and LCAT (r=0.239, p=0.046, and r=0.252, p=0.040, respectively) were also observed, but only in patients with Hp2-2 phenotype. CONCLUSIONS The reduced levels of LCAT and ApoA1 observed in this study support the suggestion that T2DM patients with Hp2-2 phenotype could have altered RCT mechanism and increased risk of developing cardiovascular disease.
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Affiliation(s)
- Samir Awadallah
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates; Metabolic Syndrome and Related Disorders (MSRD) Research Group, Research Institute of Health and Medical Sciences, University of Sharjah, United Arab Emirates.
| | - Mohammed Madkour
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates; Metabolic Syndrome and Related Disorders (MSRD) Research Group, Research Institute of Health and Medical Sciences, University of Sharjah, United Arab Emirates
| | - Reem Al Hamidi
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates
| | - Esraa Abo Alwafa
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates
| | - Maram Hattab
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates
| | - Buhour Zakkour
- Department of Medical Lab Sciences, College of Health Sciences, University of Sharjah, United Arab Emirates
| | - Amna Al-Matroushi
- Medical Services of the Ministry of Interior, Sharjah, United Arab Emirates
| | - Eslah Ahmed
- Medical Services of the Ministry of Interior, Sharjah, United Arab Emirates
| | - Mariam Al-Kitbi
- Medical Services of the Ministry of Interior, Sharjah, United Arab Emirates
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Bjornsson E, Helgason H, Halldorsson G, Helgadottir A, Gylfason A, Kehr B, Jonasdottir A, Jonasdottir A, Sigurdsson A, Oddsson A, Thorleifsson G, Magnusson OT, Gretarsdottir S, Zink F, Kristjansson RP, Asgeirsdottir M, Swinkels DW, Kiemeney LA, Eyjolfsson GI, Sigurdardottir O, Masson G, Olafsson I, Thorgeirsson G, Holm H, Thorsteinsdottir U, Gudbjartsson DF, Sulem P, Stefansson K. A rare splice donor mutation in the haptoglobin gene associates with blood lipid levels and coronary artery disease. Hum Mol Genet 2017; 26:2364-2376. [DOI: 10.1093/hmg/ddx123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/27/2017] [Indexed: 12/31/2022] Open
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9
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Cigliano L, De Rosa L, Diana D, Di Stasi R, Spagnuolo MS, Maresca B, Fattorusso R, D'Andrea LD. Structure and biological activity of a conformational constrained apolipoprotein A-I-derived helical peptide targeting the protein haptoglobin. RSC Adv 2014. [DOI: 10.1039/c4ra08507h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Tu C, Li J, Jiang X, Sheflin LG, Pfeffer BA, Behringer M, Fliesler SJ, Qu J. Ion-current-based proteomic profiling of the retina in a rat model of Smith-Lemli-Opitz syndrome. Mol Cell Proteomics 2013; 12:3583-98. [PMID: 23979708 PMCID: PMC3861709 DOI: 10.1074/mcp.m113.027847] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 08/21/2013] [Indexed: 12/26/2022] Open
Abstract
Smith-Lemli-Opitz syndrome (SLOS) is one of the most common recessive human disorders and is characterized by multiple congenital malformations as well as neurosensory and cognitive abnormalities. A rat model of SLOS has been developed that exhibits progressive retinal degeneration and visual dysfunction; however, the molecular events underlying the degeneration and dysfunction remain poorly understood. Here, we employed a well-controlled, ion-current-based approach to compare retinas from the SLOS rat model to retinas from age- and sex-matched control rats (n = 5/group). Retinas were subjected to detergent extraction and subsequent precipitation and on-pellet-digestion procedures and then were analyzed on a long, heated column (75 cm, with small particles) with a 7-h gradient. The high analytical reproducibility of the overall proteomics procedure enabled reliable expression profiling. In total, 1,259 unique protein groups, ~40% of which were membrane proteins, were quantified under highly stringent criteria, including a peptide false discovery rate of 0.4%, with high quality ion-current data (e.g. signal-to-noise ratio ≥ 10) obtained independently from at least two unique peptides for each protein. The ion-current-based strategy showed greater quantitative accuracy and reproducibility over a parallel spectral counting analysis. Statistically significant alterations of 101 proteins were observed; these proteins are implicated in a variety of biological processes, including lipid metabolism, oxidative stress, cell death, proteolysis, visual transduction, and vesicular/membrane transport, consistent with the features of the associated retinal degeneration in the SLOS model. Selected targets were further validated by Western blot analysis and correlative immunohistochemistry. Importantly, although photoreceptor cell death was validated by TUNEL analysis, Western blot and immunohistochemical analyses suggested a caspase-3-independent pathway. In total, these results provide compelling new evidence implicating molecular changes beyond the initial defect in cholesterol biosynthesis in this retinal degeneration model, and they might have broader implications with respect to the pathobiological mechanism underlying SLOS.
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Affiliation(s)
- Chengjian Tu
- From the ‡Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- §New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203
| | - Jun Li
- From the ‡Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- §New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203
| | - Xiaosheng Jiang
- From the ‡Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- §New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203
| | - Lowell G. Sheflin
- ¶Research Service, Veterans Administration Western New York Healthcare System, Buffalo, New York 14215
| | - Bruce A. Pfeffer
- ‖Departments of Ophthalmology and Biochemistry, School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- **SUNY Eye Institute, Buffalo, New York 14215
| | - Matthew Behringer
- ‖Departments of Ophthalmology and Biochemistry, School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
| | - Steven J. Fliesler
- ¶Research Service, Veterans Administration Western New York Healthcare System, Buffalo, New York 14215
- ‖Departments of Ophthalmology and Biochemistry, School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- **SUNY Eye Institute, Buffalo, New York 14215
| | - Jun Qu
- From the ‡Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260
- §New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203
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Amplification of antioxidant activity of haptoglobin(2-2)-hemoglobin at pathologic temperature and presence of antibiotics. Indian J Clin Biochem 2013; 27:171-7. [PMID: 23542503 DOI: 10.1007/s12291-011-0181-8] [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: 08/02/2011] [Accepted: 11/10/2011] [Indexed: 10/14/2022]
Abstract
It is clear that Haptoglobin binds to Hemoglobin strongly and irreversibly. This binding, protects body tissues against heme-mediated oxidative tissue damages via peroxidase activity of Haptoglobin-Hemoglobin complex. Peroxidase activity of Haptoglobin(2-2)-Hemoglobin complex was determined via measurement of following increase in absorption of produced tetraguaiacol as the second substrate of Haptoglobin-Hemoglobin complex by UV-Vis spectrophotometer at 470 nm and 42°C. The results are showing that peroxidase activity of Haptoglobin(2-2)-Hemoglobin complex is modulated by homotropic effect of hydrogen peroxide as the allosteric substrate. On the other hand, antioxidant activity of Haptoglobin(2-2)-Hemoglobin is increased via heterotropic effect of two antibiotics (especially ampicillin) on the peroxidase activity of the complex. The condition of pathologic temperature along with the administration of ampicillin and/or coamoxiclav is in favor of amplification in antioxidant activity of Haptoglobin(2-2)-Hemoglobin and combating against free radicals in individuals with Hp2-2 phenotype. Therefore, oxidative stress effects have been diminished in the population with this phenotype.
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12
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Spagnuolo MS, Di Stasi R, De Rosa L, Maresca B, Cigliano L, D'Andrea LD. Analysis of the haptoglobin binding region on the apolipoprotein A-I-derived P2a peptide. J Pept Sci 2013; 19:220-6. [PMID: 23420675 DOI: 10.1002/psc.2487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 01/08/2013] [Accepted: 01/10/2013] [Indexed: 11/10/2022]
Abstract
Apolipoprotein A-I (ApoA-I) is the main protein component of the high density lipoproteins and it plays an important role in the reverse cholesterol transport. In particular, it stimulates cholesterol efflux from peripheral cells toward liver and activates the enzyme lecithin-cholesterol acyltransferase (LCAT). Haptoglobin (Hpt), a plasma α2-glycoprotein belonging to the family of acute-phase proteins, binds to ApoA-I inhibiting the stimulation of the enzyme LCAT. Previously, we reported that a synthetic peptide, P2a, binds to and displaces Hpt from ApoA-I restoring the LCAT cholesterol esterification activity in the presence of Hpt. Here, we investigate the molecular determinants underlining the interaction between Hpt and P2a peptide. Analysis of truncated P2a analogs showed that P2a sequence can only be slight reduced in length at the N-terminal to preserve the ability of binding to Hpt. Binding assays showed that charged residues are not involved in Hpt recognition; actually, E146A and D157A substitutions increase the binding affinity to Hpt. Biological characterization of the corresponding P2a peptide analogs, Apo146 and Apo157, showed that the two peptides interfere with Hpt binding to HDL and are more effective than P2a peptide in rescue LCAT activity from Hpt inhibition. This result suggests novel hints to design peptides with anti-atherogenic activity.
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13
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Goldenstein H, Levy NS, Levy AP. Haptoglobin genotype and its role in determining heme-iron mediated vascular disease. Pharmacol Res 2012; 66:1-6. [PMID: 22465143 DOI: 10.1016/j.phrs.2012.02.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 02/27/2012] [Indexed: 12/24/2022]
Abstract
Haptoglobin (Hp) is a hemoglobin (Hb) binding protein whose major function is to prevent heme-iron mediated oxidation. The polymorphic nature of the Hp gene results in varying levels of antioxidant function associated with the protein products. Multiple clinical studies have now determined that the Hp 2-2 genotype is associated with an increased risk of developing vascular complications in patients suffering from diabetes. The mechanism for this phenomenon is a decrease in antioxidant capability associated with the Hp 2-2 protein. Specifically, heme iron associated with the Hp2-2/Hb complex is more redox active than other Hp type complexes and has been shown in a number of systems to lead to increased levels of oxidative stress in the form of oxidized lipids and decreased lipoprotein function. In addition, Hp 2-2/Hb complexes are cleared less efficiently from the circulation, leading to a buildup of iron in the plasma and in tissues. Recent analyses from clinical studies utilizing vitamin E treatment have shown beneficial results specifically in the diabetic Hp 2-2 genotype population. The use of vitamin E in the treatment of Hp 2-2 diabetics has the potential to greatly reduce medical costs and improve quality of life in the ever-growing diabetic population.
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Affiliation(s)
- Hagit Goldenstein
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, 1 Efron Street, Bat Galim P.O.B. 9649, Haifa 31096, Israel.
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A genome-wide association study identifies rs2000999 as a strong genetic determinant of circulating haptoglobin levels. PLoS One 2012; 7:e32327. [PMID: 22403646 PMCID: PMC3293812 DOI: 10.1371/journal.pone.0032327] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 01/25/2012] [Indexed: 11/19/2022] Open
Abstract
Haptoglobin is an acute phase inflammatory marker. Its main function is to bind hemoglobin released from erythrocytes to aid its elimination, and thereby haptoglobin prevents the generation of reactive oxygen species in the blood. Haptoglobin levels have been repeatedly associated with a variety of inflammation-linked infectious and non-infectious diseases, including malaria, tuberculosis, human immunodeficiency virus, hepatitis C, diabetes, carotid atherosclerosis, and acute myocardial infarction. However, a comprehensive genetic assessment of the inter-individual variability of circulating haptoglobin levels has not been conducted so far. We used a genome-wide association study initially conducted in 631 French children followed by a replication in three additional European sample sets and we identified a common single nucleotide polymorphism (SNP), rs2000999 located in the Haptoglobin gene (HP) as a strong genetic predictor of circulating Haptoglobin levels (Poverall = 8.1×10−59), explaining 45.4% of its genetic variability (11.8% of Hp global variance). The functional relevance of rs2000999 was further demonstrated by its specific association with HP mRNA levels (β = 0.23±0.08, P = 0.007). Finally, SNP rs2000999 was associated with decreased total and low-density lipoprotein cholesterol in 8,789 European children (Ptotal cholesterol = 0.002 and PLDL = 0.0008). Given the central position of haptoglobin in many inflammation-related metabolic pathways, the relevance of rs2000999 genotyping when evaluating haptoglobin concentration should be further investigated in order to improve its diagnostic/therapeutic and/or prevention impact.
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Spagnuolo MS, Cigliano L, Maresca B, Pugliese CR, Abrescia P. Identification of plasma haptoglobin forms which loosely bind hemoglobin. Biol Chem 2011; 392:371-6. [PMID: 21294680 DOI: 10.1515/bc.2011.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Haptoglobin (Hpt) is known to capture circulating free hemoglobin (Hb) and bind apolipoprotein (Apo) A-I or E. Here, we report that Hb can be tightly bound by most of Hpt molecules (TB-Hpt, 80%), whereas loosely bound by a minor part of them (LB-Hpt, 20%). LB-Hpt amount was significantly increased (over 60%) in patients with acute coronary syndrome. LB-Hpt bound ApoA-I and ApoE less efficiently than TB-Hpt (8- and 4-fold less, respectively) and did not affect their activity of stimulating the enzyme lecithin-cholesterol acyltransferase. LB-Hpt and TB-Hpt displayed comparable levels of nitrotyrosine residues, but differences in glycan chains. Changes in LB-Hpt level might be associated with changes in Hpt functions.
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Affiliation(s)
- Maria Stefania Spagnuolo
- Istituto per il Sistema Produzione Animale in Ambiente Mediterraneo, Consiglio Nazionale delle Ricerche, Naples, Italy
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Fahiminiya S, Reynaud K, Labas V, Batard S, Chastant-Maillard S, Gérard N. Steroid hormones content and proteomic analysis of canine follicular fluid during the preovulatory period. Reprod Biol Endocrinol 2010; 8:132. [PMID: 21040564 PMCID: PMC2990747 DOI: 10.1186/1477-7827-8-132] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 11/01/2010] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Follicular fluid contains substances involved in follicle activity, cell differentiation and oocyte maturation. Studies of its components may contribute to better understanding of the mechanisms underlying follicular development and oocyte quality. The canine species is characterized by several ovarian activity features that are not extensively described such as preovulatory luteinization, oocyte ovulated at the GV stage (prophase 1) and poly-oocytic follicles. In this study, we examined the hypothesis that the preovulatory LH surge is associated with changes in steroid and protein content of canine follicular fluid prior to ovulation. METHODS Follicular fluid samples were collected from canine ovaries during the preovulatory phase, before (pre-LH; n = 16 bitches) and after (post-LH; n = 16) the LH surge. Blood was simultaneously collected. Steroids were assayed by radioimmunoassay and proteomic analyses were carried out by 2D-PAGE and mass spectrometry. RESULTS The concentrations of 17beta-estradiol and progesterone at the pre-LH stage were 737.2 +/- 43.5 ng/ml and 2630.1 +/- 287.2 ng/ml in follicular fluid vs. 53 +/- 4.1 pg/ml and 3.9 +/- 0.3 ng/ml in plasma, respectively. At that stage, significant positive correlations between follicular size and intra-follicular steroid concentrations were recorded. After the LH peak, the intrafollicular concentration of 17beta-estradiol decreased significantly (48.3 +/- 4.4 ng/ml; p < 0.001), whereas that of progesterone increased (11690.2 +/- 693.6 ng/ml; p < 0.001). Plasmatic concentration of 17beta-estradiol was not modified (49 +/- 9.6 pg/ml) after the LH peak, but that of progesterone significantly increased (9.8 +/- 0.63 ng/ml).Proteomic analysis of canine follicular fluid identified 38 protein spots, corresponding to 21 proteins, some of which are known to play roles in the ovarian physiology. The comparison of 2D-PAGE patterns of follicular fluids from the pre- and post-LH stages demonstrated 3 differentially stained single spot or groups of spots. One of them was identified as complement factor B. A comparison of follicular fluid and plasma protein patterns demonstrated a group of 4 spots that were more concentrated in plasma than in follicular fluid, and a single spot specific to follicular fluid. These proteins were identified as gelsolin and clusterin, respectively. CONCLUSION Our results provide the first demonstration of size-related changes in the steroid concentrations in canine follicular fluid associated with the LH surge. 2D protein mapping allowed identification of several proteins that may play a role in follicle physiology and ovarian activity at the preovulatory stage. This may help in the future to explain and to better understand the species specificities that are described in dogs.
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Affiliation(s)
- Somayyeh Fahiminiya
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
| | - Karine Reynaud
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
- ENVA, UMR 1198 Biologie du Développement et Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
| | - Valérie Labas
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, Plate-forme d'Analyse Intégrative des Biomarqueurs, Laboratoire de Spectrométrie de Masse, F-37380 Nouzilly, France
| | - Séverine Batard
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
| | - Sylvie Chastant-Maillard
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
- ENVA, UMR 1198 Biologie du Développement et Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
- ENVA, Unité de Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
| | - Nadine Gérard
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
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Fujimoto VY, Kane JP, Ishida BY, Bloom MS, Browne RW. High-density lipoprotein metabolism and the human embryo. Hum Reprod Update 2010; 16:20-38. [PMID: 19700490 DOI: 10.1093/humupd/dmp029] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND High-density lipoprotein (HDL) appears to be the dominant lipoprotein particle in human follicular fluid (FF). The reported anti-atherogenic properties of HDL have been attributed in part to reverse cholesterol transport. The discoveries of the scavenger receptor class B type I (SR-BI) and the ATP-binding cassette A1 lipid (ABCA1) transporter have generated studies aimed at unraveling the pathways of HDL biogenesis, remodeling and catabolism. The production of SR-BI and ABCA1 knockout mice as well as other lipoprotein metabolism-associated mutants has resulted in reduced or absent fertility, leading us to postulate the existence of a human hepatic-ovarian HDL-associated axis of fertility. Here, we review an evolving literature on the role of HDL metabolism on mammalian fertility and oocyte development. METHODS An extensive online search was conducted of published articles relevant to the section topics discussed. All relevant English language articles contained in Pubmed/Medline, with no specific time frame for publication, were considered for this narrative review. Cardiovascular literature was highly cited due to the wealth of relevant knowledge on HDL metabolism, and the dearth thereof in the reproductive field. RESULTS Various vertebrate models demonstrate a role for HDL in embryo development and fertility. In our clinical studies, FF levels of HDL cholesterol and apolipoprotein AI levels were negatively associated with embryo fragmentation, but not with embryo cell cleavage rate. However, the HDL component, paraoxonase 1 arylesterase activity, was positively associated with embryo cell cleavage rate. CONCLUSIONS HDL contributes to intra-follicular cholesterol homeostasis which appears to be important for successful oocyte and embryo development.
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Affiliation(s)
- Victor Y Fujimoto
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California at San Francisco, San Francisco, CA 94115-0916, USA.
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Wang Y, Jacome-Sosa MM, Ruth MR, Goruk SD, Reaney MJ, Glimm DR, Wright DC, Vine DF, Field CJ, Proctor SD. Trans-11 vaccenic acid reduces hepatic lipogenesis and chylomicron secretion in JCR:LA-cp rats. J Nutr 2009; 139:2049-54. [PMID: 19759243 DOI: 10.3945/jn.109.109488] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Trans-11 vaccenic acid (VA) is the predominant trans isomer in ruminant fat and a major precursor to the endogenous synthesis of cis9,trans11-conjugated linoleic acid in humans and animals. We have previously shown that 3-wk VA supplementation has a triglyceride (TG)-lowering effect in a rat model of dyslipidemia, obesity, and metabolic syndrome (JCR:LA-cp rats). The objective of this study was to assess the chronic effect (16 wk) of VA on lipid homeostasis in both the liver and intestine in obese JCR:LA-cp rats. Plasma TG (P < 0.001), total cholesterol (P < 0.001), LDL cholesterol (P < 0.01), and nonesterified fatty acid concentrations, as well as the serum haptoglobin concentration, were all lower in obese rats fed the VA diet compared with obese controls (P < 0.05). In addition, there was a decrease in the postprandial plasma apolipoprotein (apo)B48 area under the curve (P < 0.05) for VA-treated obese rats compared with obese controls. The hepatic TG concentration and the relative abundance of fatty acid synthase and acetyl-CoA carboxylase proteins were all lower (P < 0.05) in the VA-treated group compared with obese controls. Following acute gastrointestinal infusion of a VA-triolein emulsion in obese rats that had been fed the control diet for 3 wk, the TG concentration was reduced by 40% (P < 0.05) and the number of chylomicron (CM) particles (apoB48) in nascent mesenteric lymph was reduced by 30% (P < 0.01) relative to rats infused with a triolein emulsion alone. In conclusion, chronic VA supplementation significantly improved dyslipidemia in both the food-deprived and postprandial state in JCR:LA-cp rats. The appreciable hypolipidemic benefits of VA may be attributed to a reduction in both intestinal CM and hepatic de novo lipogenesis pathways.
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Affiliation(s)
- Ye Wang
- Alberta Institute for Human Nutrition, University of Alberta, Edmonton, AB, Canada
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Cigliano L, Pugliese CR, Spagnuolo MS, Palumbo R, Abrescia P. Haptoglobin binds the antiatherogenic protein apolipoprotein E - impairment of apolipoprotein E stimulation of both lecithin:cholesterol acyltransferase activity and cholesterol uptake by hepatocytes. FEBS J 2009; 276:6158-71. [DOI: 10.1111/j.1742-4658.2009.07319.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abdullah M, Schultz H, Kähler D, Branscheid D, Dalhoff K, Zabel P, Vollmer E, Goldmann T. Expression of the acute phase protein haptoglobin in human lung cancer and tumor-free lung tissues. Pathol Res Pract 2009; 205:639-47. [DOI: 10.1016/j.prp.2009.04.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 03/26/2009] [Accepted: 04/09/2009] [Indexed: 10/20/2022]
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Henderson RJ, Wasan KM, Leon CG. Haptoglobin inhibits phospholipid transfer protein activity in hyperlipidemic human plasma. Lipids Health Dis 2009; 8:27. [PMID: 19627602 PMCID: PMC2729738 DOI: 10.1186/1476-511x-8-27] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 07/23/2009] [Indexed: 12/16/2022] Open
Abstract
Background Haptoglobin is a plasma protein that scavenges haemoglobin during haemolysis. Phospholipid Transfer Protein (PLTP) transfers lipids from Low Density Lipoproteins (LDL) to High Density Lipoproteins (HDL). PLTP is involved in the pathogenesis of atherosclerosis which causes coronary artery disease, the leading cause of death in North America. It has been shown that Apolipoprotein-A1 (Apo-A1) binds and regulates PLTP activity. Haptoglobin can also bind to Apo-A1, affecting the ability of Apo-A1 to induce enzymatic activities. Thus we hypothesize that haptoglobin inhibits PLTP activity. This work tested the effect of Haptoglobin and Apo-A1 addition on PLTP activity in human plasma samples. The results will contribute to our understanding of the role of haptoglobin on modulating reverse cholesterol transport. Results We analyzed the PLTP activity and Apo-A1 and Haptoglobin content in six hyperlipidemic and six normolipidemic plasmas. We found that Apo-A1 levels are proportional to PLTP activity in hyperlipidemic (R2 = 0.66, p < 0.05) but not in normolipidemic human plasma. Haptoglobin levels and PLTP activity are inversely proportional in hyperlipidemic plasmas (R2 = 0.57, p > 0.05). When the PLTP activity was graphed versus the Hp/Apo-A1 ratio in hyperlipidemic plasma there was a significant correlation (R2 = 0.69, p < 0.05) suggesting that PLTP activity is affected by the combined effect of Apo-A1 and haptoglobin. When haptoglobin was added to individual hyperlipidemic plasma samples there was a dose dependent decrease in PLTP activity. In these samples we also found a negative correlation (-0.59, p < 0.05) between PLTP activity and Hp/Apo-A1. When we added an amount of haptoglobin equivalent to 100% of the basal levels, we found a 64 ± 23% decrease (p < 0.05) in PLTP activity compared to basal PLTP activity. We tested the hypothesis that additional Apo-A1 would induce PLTP activity. Interestingly we found a dose dependent decrease in PLTP activity upon Apo-A1 addition. When both Apo-A1 and Hpt were added to the plasma samples there was no further reduction in PLTP activity suggesting that they act through a common pathway. Conclusion These findings suggest an inhibitory effect of Haptoglobin over PLTP activity in hyperlipidemic plasma that may contribute to the regulation of reverse cholesterol transport.
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Affiliation(s)
- Ryan J Henderson
- Division of Pharmaceutics and Biopharmaceutics, Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, British Columbia V6T1Z3, Canada.
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Salvatore A, Cigliano L, Carlucci A, Bucci EM, Abrescia P. Haptoglobin binds apolipoprotein E and influences cholesterol esterification in the cerebrospinal fluid. J Neurochem 2009; 110:255-63. [PMID: 19457062 DOI: 10.1111/j.1471-4159.2009.06121.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Haptoglobin (Hpt) binds the apolipoprotein (Apo) A-I domain, which is involved in stimulating the enzyme lecithin-cholesterol acyltransferase (LCAT) for cholesterol esterification. This binding was shown to protect ApoA-I against hydroxyl radicals, thus preventing loss of ApoA-I function in enzyme stimulation. In this study, we report that Hpt is also able to bind ApoE. The Hpt binding site on the ApoE structure was mapped by using synthetic peptides, and found homologous to the Hpt binding site of ApoA-I. Hydroxyl radicals promoted in vitro the formation of ApoE-containing adducts which were detected by immunoblotting. Hpt impaired this oxidative modification whereas albumin did not. CSF from patients with multiple sclerosis or subjects without neurodegeneration contains oxidized forms of ApoE and ApoA-I similar to those observed in vitro. CSF was analyzed for its level of ApoA-I, ApoE, Hpt, cholesteryl esters, and unesterified cholesterol. The ratio of esterified with unesterified cholesterol, assumed to reflect the LCAT activity ex vivo, did not correlate with either analyzed protein, but conversely correlated with the ratio [Hpt]/([ApoE]+[ApoA-I]). The results suggest that Hpt might save the function of ApoA-I and ApoE for cholesterol esterification, a process contributing to cholesterol elimination from the brain.
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Affiliation(s)
- Alfonso Salvatore
- Dipartimento delle Scienze Biologiche Università di Napoli Federico II, Mezzocannone, Napoli, Italia
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Relevance of the amino acid conversions L144R (Zaragoza) and L159P (Zavalla) in the apolipoprotein A-I binding site for haptoglobin. Biol Chem 2008; 389:1421-6. [DOI: 10.1515/bc.2008.156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe high-density lipoprotein apolipoprotein A-I (ApoA-I) stimulates the enzyme lecithin-cholesterol acyltransferase (LCAT) in the reverse cholesterol transport pathway. Two ApoA-I variants, Zaragoza (L144R) and Zavalla (L159P), are associated with low levels of HDL-cholesterol but normal LCAT activity. Haptoglobin interacts with ApoA-I, impairing LCAT stimulation. Synthetic peptides matching the haptoglobin-binding site of native or variant ApoA-I (native, P2a; variants, Zav-pep and Zar-pep) bound haptoglobin with different activity: Zar-pep>P2a>Zav-pep. They also differently rescued LCATin vitroactivity in the presence of haptoglobin (P2a=Zar-pep>Zav-pep). Therefore, both amino acid conversions affect haptoglobin binding and LCAT regulation. We highlight the role of haptoglobin in LCAT regulation in subjects with ApoA-I variants.
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Cigliano L, Maresca B, Salvatore A, Nino M, Monfrecola G, Ayala F, Carlucci A, Pugliese RC, Pedone C, Abrescia P. Haptoglobin from psoriatic patients exhibits decreased activity in binding haemoglobin and inhibiting lecithin-cholesterol acyltransferase activity. J Eur Acad Dermatol Venereol 2008; 22:417-25. [DOI: 10.1111/j.1468-3083.2007.02444.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Watanabe J, Chou KJ, Liao JC, Miao Y, Meng HH, Ge H, Grijalva V, Hama S, Kozak K, Buga G, Whitelegge JP, Lee TD, Farias-Eisner R, Navab M, Fogelman AM, Reddy ST. Differential association of hemoglobin with proinflammatory high density lipoproteins in atherogenic/hyperlipidemic mice. A novel biomarker of atherosclerosis. J Biol Chem 2007; 282:23698-707. [PMID: 17556366 DOI: 10.1074/jbc.m702163200] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Studies in both mice and humans suggest that the anti- or proinflammatory nature of high density lipoprotein (HDL) may be a more sensitive predictor of risk for coronary heart disease events. In this study, we report the identification and characterization of two proteins (m/z 14,900 and 15,600) that are most dramatically associated with HDL in mouse models of atherosclerosis. Mass spectral analyses of proinflammatory HDL identified the two peaks to be hemoglobin (Hb) alpha and beta chains, respectively, with no apparent post-translational modification. Biochemical analysis confirmed the differential association of Hb with HDL from hyperlipidemic mice. We further show that HDL-associated Hb is predominantly in the oxyHb form with distinct physical and chemical properties. Furthermore oxyHb-containing proinflammatory HDL potently consumed nitric oxide and contracted arterial vessels ex vivo. Moreover Hb also was found differentially associated with HDL from coronary heart disease patients compared with healthy controls. Our data suggest that Hb contributes to the proinflammatory nature of HDL in mouse and human models of atherosclerosis and may serve as a novel biomarker for atherosclerosis.
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Affiliation(s)
- Junji Watanabe
- Atherosclerosis Research Unit, Department of Medicine/Cardiology, University of California, Los Angeles, California 90095, USA
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Engström G, Hedblad B, Janzon L, Lindgärde F. Long-Term Change in Cholesterol in Relation to Inflammation-Sensitive Plasma Proteins: A Longitudinal Study. Ann Epidemiol 2007; 17:57-63. [PMID: 17178329 DOI: 10.1016/j.annepidem.2006.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2005] [Revised: 03/02/2006] [Accepted: 03/06/2006] [Indexed: 10/23/2022]
Abstract
PURPOSE The nature of the relationship between inflammation and elevated serum lipid levels is incompletely understood. This longitudinal study explores whether elevated levels of inflammation-sensitive plasma proteins (ISPs) are a risk factor for developing increased cholesterol and triglyceride levels. METHODS Five ISPs (fibrinogen, orosomucoid, alpha1-antitrypsin, haptoglobin, and ceruloplasmin) were measured in a population-based cohort of nondiabetic healthy men aged 38 to 50 years at baseline. Subjects were reexamined after a mean of 6.2 years. The development of hypercholesterolemia (cholesterol>or=6.5 mmol/L [>or=251 mg/dL]) and hypertriglyceridemia (triglycerides>or=2.3 mmol/L [>or=204 mg/dL]) during follow-up was studied in relation to the number of elevated levels of ISPs (i.e., in the top quartile). RESULTS Of men with initially normal cholesterol levels (<6.5 mmol/L; n=2224), proportions of men with no, one, two, and three or more elevated ISP levels at baseline who developed hypercholesterolemia were 12%, 13%, 16%, and 20%, respectively (p for trend=0.0002). This relationship remained significant after adjustments for cholesterol level at baseline and other confounding factors. The relationship between ISP levels and future hypertriglyceridemia was attenuated and nonsignificant after adjustments for confounding factors. CONCLUSION In apparently healthy men with initially normal cholesterol levels, elevated ISP levels are a risk factor for development of hypercholesterolemia.
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Affiliation(s)
- Gunnar Engström
- Department of Clinical Science, Section for Epidemiology, Lund University, Malmö University Hospital, Sweden.
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Jensby Nielsen M, Bo Nielsen L, Moestrup SK. High-density lipoprotein and innate immunity. ACTA ACUST UNITED AC 2006. [DOI: 10.2217/17460875.1.6.729] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Asleh R, Miller-Lotan R, Aviram M, Hayek T, Yulish M, Levy JE, Miller B, Blum S, Milman U, Shapira C, Levy AP. Haptoglobin genotype is a regulator of reverse cholesterol transport in diabetes in vitro and in vivo. Circ Res 2006; 99:1419-25. [PMID: 17082477 DOI: 10.1161/01.res.0000251741.65179.56] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two common alleles exist at the haptoglobin (Hp) locus, and the Hp2 allele is associated with an increased incidence of cardiovascular disease, specifically in diabetes mellitus (DM). Oxidative stress is increased in Hp2 mice and humans with DM. Oxidative modification of the apolipoprotein A-I inhibits reverse cholesterol transport. We sought to test the hypothesis that reverse cholesterol transport is impaired in Hp2 DM mice and humans. In vitro, using serum from non-DM and DM individuals, we measured cholesterol efflux from (3)H-cholesterol-labeled macrophages. In vivo, we injected (3)H-cholesterol-loaded macrophages intraperitoneally into non-DM and DM mice with the Hp1-1 or Hp2-2 genotype and monitored (3)H-tracer levels in plasma, liver, and feces. In vitro, in DM individuals only, we observed significantly decreased cholesterol efflux from macrophages incubated with serum from Hp2-1 or Hp2-2 as compared with Hp1-1 individuals (P<0.01). The interaction between Hp type and DM was recapitulated using purified Hp and glycated Hb. In vivo, DM mice loaded with (3)H-cholesterol-labeled macrophages had a 40% reduction in (3)H-cholesterol in plasma, liver, and feces as compared with non-DM mice (P<0.01). The reduction in reverse cholesterol transport associated with DM was significantly greater in Hp2-2 mice as compared with Hp1-1 mice (54% versus 25% in plasma; 52% versus 27% in liver; 57% versus 32% in feces; P<0.03). reverse cholesterol transport is decreased in Hp2-2 DM. This may explain in part the increased atherosclerotic burden found in Hp2-2 DM individuals.
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Affiliation(s)
- Rabea Asleh
- Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, POB 9649, Haifa 31096, Israel
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Schweigert FJ, Gericke B, Wolfram W, Kaisers U, Dudenhausen JW. Peptide and protein profiles in serum and follicular fluid of women undergoing IVF. Hum Reprod 2006; 21:2960-8. [PMID: 16893915 DOI: 10.1093/humrep/del257] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Proteins and peptides in human follicular fluid originate from plasma or are produced by follicular structures. Compositional changes reflect oocyte maturation and can be used as diagnostic markers. The aim of the study was to determine protein and peptide profiles in paired serum and follicular fluid samples from women undergoing IVF. METHODS Surface-enhanced laser desorption and ionization-time of flight-mass spectrometry (SELDI-TOF-MS) was used to obtain characteristic protein pattern. RESULTS One hundred and eighty-six individual MS signals were obtained from a combination of enrichment on strong anion exchanger (110), weak cation exchanger (52) and normal phase surfaces (24). On the basis of molecular masses, isoelectric points and immunoreactivety, four signals were identified as haptoglobin (alpha(1)- and alpha(2)-chain), haptoglobin 1 and transthyretin (TTR). Immunological and MS characteristics of the TTR : retinol-binding protein (RBP) transport complex revealed no microheterogeneity differences between serum and follicular fluid. Discriminatory patterns arising from decision-tree-based classification and regression analysis distinguished between serum and follicular fluid with a sensitivity and specificity of 100%. CONCLUSIONS Quantitative and qualitative differences indicate selective transport processes rather than mere filtration across the blood-follicle barrier. Identified proteins as well as characteristic peptide and/or protein signatures might emerge as potential candidates for diagnostic markers of follicle and/or oocyte maturation and thus oocyte quality.
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Affiliation(s)
- Florian J Schweigert
- Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Germany.
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Yesilaltay A, Morales MG, Amigo L, Zanlungo S, Rigotti A, Karackattu SL, Donahee MH, Kozarsky KF, Krieger M. Effects of hepatic expression of the high-density lipoprotein receptor SR-BI on lipoprotein metabolism and female fertility. Endocrinology 2006; 147:1577-88. [PMID: 16410302 DOI: 10.1210/en.2005-1286] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The etiology of human female infertility is often uncertain. The sterility of high-density lipoprotein (HDL) receptor-negative (SR-BI(-/-)) female mice suggests a link between female infertility and abnormal lipoprotein metabolism. SR-BI(-/-) mice exhibit elevated plasma total cholesterol [with normal-sized and abnormally large HDL and high unesterified to total plasma cholesterol (UC:TC) ratio]. We explored the influence of hepatic SR-BI on female fertility by inducing hepatic SR-BI expression in SR-BI(-/-) animals by adenovirus transduction or stable transgenesis. For transgenes, we used both wild-type SR-BI and a double-point mutant, Q402R/Q418R (SR-BI-RR), which is unable to bind to and mediate lipid transfer from wild-type HDL normally, but retains virtually normal lipid transport activities with low-density lipoprotein. Essentially wild-type levels of hepatic SR-BI expression in SR-BI(-/-) mice restored to nearly normal the HDL size distribution and plasma UC:TC ratio, whereas approximately 7- to 40-fold overexpression dramatically lowered plasma TC and increased biliary cholesterol secretion. In contrast, SR-BI-RR overexpression had little effect on SR-BI(+/+) mice, but in SR-BI(-/-) mice, it substantially reduced levels of abnormally large HDL and normalized the UC:TC ratio. In all cases, hepatic transgenic expression restored female fertility. Overexpression in SR-BI(-/-) mice of lecithin:cholesterol acyl transferase, which esterifies plasma HDL cholesterol, did not normalize the UC:TC ratio, probably because the abnormal HDL was a poor substrate, and did not restore fertility. Thus, hepatic SR-BI-mediated lipoprotein metabolism influences murine female fertility, raising the possibility that dyslipidemia might contribute to human female infertility and that targeting lipoprotein metabolism might complement current assisted reproductive technologies.
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Affiliation(s)
- Ayce Yesilaltay
- Department of Biology, Massachusetts Institute of Technology, Cambridge, 02139, USA
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Chen YC, Wang PW, Pan TL, Wallace CG, Chen CJ. Proteomic analysis of Down's syndrome patients with gout. Clin Chim Acta 2006; 369:89-94. [PMID: 16500633 DOI: 10.1016/j.cca.2006.01.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2005] [Revised: 01/16/2006] [Accepted: 01/16/2006] [Indexed: 11/26/2022]
Abstract
BACKGROUND In this study, the expression of hypoxanthine-guanine phosphoribosyl transferase (HPRT) in Down's syndrome patients with gout (DS/G) was determined, and possible underlying mechanisms of gout were characterized using proteomic tools. METHODS Serum was obtained from DS/G, healthy controls and gout patients (without DS), recruited from the rheumatology clinic. Baseline enzyme assays were recorded and RT-PCR used to identify HPRT gene expression. 2-D electrophoresis and mass spectrometry were utilized to determine a plausible explanation concerning the mechanisms leading to increased uric acid levels in DS patients. RESULTS Two DS patients were diagnosed with gouty arthritis. Their HPRT enzyme activity was slightly lower than that of normal controls. HPRT expression was also slightly decreased in DS/G patients compared with controls. Serum protein profiles of these two DS/G patients revealed that haptoglobin alpha chain and apolipoprotein A1 (ApoA1) were both significantly down-regulated. Protein expression was validated by immunoblot. CONCLUSION Our results revealed that low levels of haptoglobin in the two DS/G patients were related to renal dysfunction may have affected uric acid excretion and caused gout. However, decreased ApoA1 revealed a positive correlation between defective lipid metabolism and gouty arthritis in DS/G patients.
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Affiliation(s)
- Ying-Chou Chen
- Department of Rheumatology, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
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Cigliano L, Spagnuolo MS, Cuomo G, Valentini G, Niglio A, Abrescia P. Apolipoprotein A-I-dependent cholesterol esterification in patients with rheumatoid arthritis. Life Sci 2005; 77:108-20. [PMID: 15848223 DOI: 10.1016/j.lfs.2004.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2004] [Accepted: 12/29/2004] [Indexed: 11/25/2022]
Abstract
Growing evidence suggests that atherogenesis is associated with inflammation or defective removal of cholesterol excess from peripheral cells. Apolipoprotein A-I [ApoA-I] activates the enzyme Lecithin-Cholesterol Acyl-Transferase to esterify cell cholesterol for transport to liver. Haptoglobin [Hpt] was previously found able to bind ApoA-I, and suggested to reduce the enzyme activation. The aim of this study was to demonstrate that enhanced levels of Hpt, as present during inflammation, are associated with low enzyme activity and increased thickness of the arterial wall. Enzyme activity and Hpt concentration were analysed in patients with rheumatoid arthritis having the same plasma levels of antioxidants (ascorbate, urate, alpha-tocopherol, retinol) or oxidation markers (nitrotyrosine, lipoperoxide) of healthy subjects. Cholesterol esterification, determined as ratio of cholesteryl esters with cholesterol in high-density lipoproteins, was lower in patients than in controls, and negatively correlated with the intima-media wall thickness of the common carotid. The ratio of Hpt with ApoA-I was negatively correlated with the enzyme activity, while positively correlated with intima-media wall thickness. The results suggest that high Hpt levels might severely impair the enzyme activity, thus contributing to cholesterol accumulation in vascular cells, and lesion formation in the endothelium.
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Affiliation(s)
- Luisa Cigliano
- Dipartimento di Fisiologia Generale ed Ambientale, Università di Napoli Federico II, via Mezzocannone 8, Napoli-80134, Italia
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Spagnuolo MS, Cigliano L, D'Andrea LD, Pedone C, Abrescia P. Assignment of the binding site for haptoglobin on apolipoprotein A-I. J Biol Chem 2004; 280:1193-8. [PMID: 15533931 DOI: 10.1074/jbc.m411390200] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Haptoglobin (Hpt) was previously found to bind the high density lipoprotein (HDL) apolipoprotein A-I (ApoA-I) and able to inhibit the ApoA-I-dependent activity of the enzyme lecithin:cholesterol acyltransferase (LCAT), which plays a major role in the reverse cholesterol transport. The ApoA-I structure was analyzed to detect the site bound by Hpt. ApoA-I was treated by cyanogen bromide or hydroxylamine; the resulting fragments, separated by electrophoresis or gel filtration, were tested by Western blotting or enzyme-linked immunosorbent assay for their ability to bind Hpt. The ApoA-I sequence from Glu113 to Asn184 harbored the binding site for Hpt. Biotinylated peptides were synthesized overlapping such a sequence, and their Hpt binding activity was determined by avidin-linked peroxidase. The highest activity was exhibited by the peptide P2a, containing the ApoA-I sequence from Leu141 to Ala164. Such a sequence contains an ApoA-I domain required for binding cells, promoting cholesterol efflux, and stimulating LCAT. The peptide P2a effectively prevented both binding of Hpt to HDL-coated plastic wells and Hpt-dependent inhibition of LCAT, measured by anti-Hpt antibodies and cholesterol esterification activity, respectively. The enzyme activity was not influenced, in the absence of Hpt, by P2a. Differently from ApoA-I or HDL, the peptide did not compete with hemoglobin for Hpt binding in enzyme-linked immunosorbent assay experiments. The results suggest that Hpt might mask the ApoA-I domain required for LCAT stimulation, thus impairing the HDL function. Synthetic peptides, able to displace Hpt from ApoA-I without altering its property of binding hemoglobin, might be used for treatment of diseases associated with defective LCAT function.
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Affiliation(s)
- Maria Stefania Spagnuolo
- Dipartimento di Fisiologia Generale ed Ambientale, Università di Napoli Federico II, via Mezzocannone 8, 80134 Napoli, Italia
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Cigliano L, Spagnuolo MS, Abrescia P. Quantitative variations of the isoforms in haptoglobin 1-2 and 2-2 individual phenotypes. Arch Biochem Biophys 2003; 416:227-37. [PMID: 12893301 DOI: 10.1016/s0003-9861(03)00318-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Haptoglobin is a hemoglobin-binding protein presenting in humans three distinct phenotypes (Hpt 1-1, Hpt 1-2, or Hpt 2-2). The Hpt 1-2 and Hpt 2-2 phenotypes are in turn represented by populations of isoforms. The relative amounts of the major isoforms of Hpt 1-2 and Hpt 2-2 were found to differ not only in different individuals, but also in the same individual before and after a physical effort. Exercise-dependent changes in the plasma concentrations of ascorbate, urate, alpha-tocopherol, retinol, and glutathione were also observed, but correlations between such changes and those of the amount for any isoform were not found. Samples of Hpt 1-2 or Hpt 2-2 were challenged with oxidants (H(2)O(2) with ferrous ions, spermine-NO, KO(2), and 3-morpholinosydnonimine), but the isoform levels were not altered. Hpt 2-2 isoforms were present in Hpt 1-2, as minor species. Furthermore, different isoforms exhibited different hemoglobin binding abilities. Thus, these parameters should also be taken into consideration in studies correlating Hpt phenotypes prevalence with pathologies or functional differences.
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Affiliation(s)
- Luisa Cigliano
- Dipartimento di Fisiologia Generale ed Ambientale, Università di Napoli Federico II, via Mezzocannone 8, Naples 80134, Italy
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Spagnuolo MS, Cigliano L, Abrescia P. The Binding of Haptoglobin to Apolipoprotein AI: Influence of Hemoglobin and Concanavalin A. Biol Chem 2003; 384:1593-6. [PMID: 14719801 DOI: 10.1515/bc.2003.176] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Haptoglobin (Hp) can be purified by affinity chromatography using hemoglobin (Hb)-linked Sepharose. Elution with 8 M urea is generally performed, resulting in heavy contamination of the Hp preparation by apolipoprotein AI (ApoAI), and partial loss of Hb binding activity. Hp, separated from ApoAI, was recovered by elution with glycine-HCl at pH 3. Complexes of the isolated protein with Hb or ApoAI were detected by enzyme-linked immunosorbent assay (ELISA). Competition between the two ligands in their interaction with Hp was observed. Concanavalin A (ConA), which binds the Hp carbohydrate chains, did not influence Hp binding to ApoAI. These results suggest that changes in the plasma levels of ApoAI or Hb affect the Hp role in regulating the reverse transport of cholesterol or preventing Hb-dependent oxidative damage.
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Affiliation(s)
- Maria Stefania Spagnuolo
- Dipartimento di Fisiologia Generale ed Ambientale, Università di Napoli Federico II, I-80134 Napoli, Italy
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