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Salehipour P, Rezagholizadeh F, Mahdiannasser M, Kazerani R, Modarressi MH. Association of OLR1 gene polymorphisms with the risk of coronary artery disease: A systematic review and meta-analysis. Heart Lung 2021; 50:334-343. [PMID: 33524863 DOI: 10.1016/j.hrtlng.2021.01.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 01/14/2021] [Accepted: 01/21/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Oxidized LDL receptor 1 (OLR1) encodes LOX-1, LOXIN, and OLR1D4 transcript variants. Up-regulation of LOX-1 and down-regulation of LOXIN have an essential role in causing coronary artery disease (CAD). Discovery of risk single nucleotide polymorphisms (SNPs) in OLR1 gene is clinically important as these polymorphisms could be candidate biomarkers of CAD. OBJECTIVES The purpose of this study is quantitative evidence synthesis on how OLR1 polymorphisms in the haplotype block impact the risk of CAD. METHODS First, a systematic keyword-based search in PubMed, Web of Science, and Scopus was conducted. After data extraction, pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated for OLR1 polymorphisms and CAD. Twelve case-control studies, including 6,238 cases and 15,773 controls, were concluded in the meta-analysis. RESULTS Our findings demonstrate significant association of OLR1 polymorphisms in the haplotype block with CAD risk in all genetic models (allelic model: OR = 1.19, 95%CI = 1.06-1.34; additive model: OR = 1.54, 95%CI = 1.16-2.05; recessive model: OR = 1.26, 95%CI = 1.04-1.53; dominant model: OR = 1.28, 95%CI = 1.09-1.51). Subgroup analysis based on the type of polymorphism revealed that rs1050283 (3'UTR*188 C > T) and rs3736235 (IVS4-14 A > G) are more significantly associated with the risk of CAD compared to other polymorphisms in the haplotype block. CONCLUSIONS We found a significant association between OLR1 polymorphisms in the haplotype block, especially rs1050283 and rs3736235, with CAD. We also suggest that precise determination of disease association with polymorphisms in a haplotype requires investigation of all SNPs rather than a single SNP in that specific haplotype.
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Affiliation(s)
- Pouya Salehipour
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Rezagholizadeh
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Mojdeh Mahdiannasser
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Reihane Kazerani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Pucci S, Polidoro C, Greggi C, Amati F, Morini E, Murdocca M, Biancolella M, Orlandi A, Sangiuolo F, Novelli G. Pro-oncogenic action of LOX-1 and its splice variant LOX-1Δ4 in breast cancer phenotypes. Cell Death Dis 2019; 10:53. [PMID: 30718451 PMCID: PMC6362207 DOI: 10.1038/s41419-018-1279-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/19/2018] [Accepted: 11/21/2018] [Indexed: 12/15/2022]
Abstract
The identification of new predictive biomarkers and therapeutic target for tailored therapy in breast cancer onset and progression is an interesting challenge. OLR-1 gene encodes the cell membrane receptor LOX-1 (lectin-like oxidized low-density lipoprotein receptor). We have recently identified a novel alternative OLR-1 isoform, LOX-1Δ4, whose expression and functions are still not clarified. In the present paper, we demonstrated that LOX-1 is overexpressed in 70% of human breast cancer (n = 47) and positively correlated to the tumor stage and grade (p < 0.01). Observations on LOX-1 and its splice variant Δ4 pointed out a different expression pattern correlated to breast cancer phenotypes. Overexpressing LOX-1 and LOX-1Δ4 in vitro, we obtained a strong enhancement of proliferative rate and a downregulation of cell death-related proteins. In addition, we observed a strong modulation of histone H4 acetylation and Ku70, the limiting factor of DNA double-strand breaks repair machinery implied in apoptosis inhibition and drug resistance acquisition. Moreover, LOX-1Δ4 overexpression is able to increase proliferation in a non-tumorigenic epithelial cell line, MCF12-F, acting as an oncogene. Altogether, these results suggest that LOX-1 may acts as a molecular link among metabolism, inflammation and cancer, indicating its potential role as biomarker and new molecular target, representing an attractive and concrete opportunity to improve current strategies for breast cancer tailored therapy.
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Affiliation(s)
- Sabina Pucci
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy.
| | - Chiara Polidoro
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Chiara Greggi
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Francesca Amati
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Elena Morini
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Michela Murdocca
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Michela Biancolella
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy
| | - Augusto Orlandi
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Federica Sangiuolo
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Giuseppe Novelli
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy.,Neuromed, I.R.C.C.S, Pozzilli, Italy
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Bruno V, Rizzacasa B, Pietropolli A, Capogna MV, Massoud R, Ticconi C, Piccione E, Cortese C, Novelli G, Amati F. OLR1 and Loxin Expression in PBMCs of Women with a History of Unexplained Recurrent Miscarriage: A Pilot Study. Genet Test Mol Biomarkers 2017; 21:363-372. [PMID: 28409654 DOI: 10.1089/gtmb.2016.0331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
AIMS The aim of this study was to evaluate the expression of OLR1 and its alternative splicing isoform Loxin in unexplained recurrent miscarriage (uRM). METHODS Sixty-three women of reproductive age were recruited and were divided into four groups: 18 pregnant and 23 non-pregnant women with uRM, and 12 pregnant and 10 non-pregnant women with physiological pregnancies. Complementary DNA derived from peripheral blood mononuclear cells (PBMCs) was analyzed by quantitative real-time PCR to evaluate the expression of OLR1 and Loxin. Oxidized low-density lipoproteins (ox-LDLs) were assayed from serum by a commercially available kit. RESULTS Pregnant uRM women presented with a higher, though not significant, OLR1/Loxin ratio and a higher ox-LDLs serum level (p ≤ 0.05) compared with pregnant control women. OLR1 and Loxin levels were significantly decreased in non-pregnant uRM women compared with the control (OLR1: 0.00018 vs. 0.00043, p ≤ 0.005; Loxin: 0.00018 vs. 0.00060, p ≤ 0.005, respectively). Loxin expression decreased by about two-thirds (p ≤ 0.005) in pregnant women compared with non-pregnant control women. A higher expression of OLR1 in pregnant women compared with non-pregnant women with uRM (p ≤ 0.05) was observed, but no variation in Loxin expression was observed. CONCLUSIONS The results of this study show an association of peripheral OLR1 and Loxin expression levels in uRM women, and they suggest the possible existence of an uncontrolled oxidative stress in these women in the first trimester of pregnancy.
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Affiliation(s)
- Valentina Bruno
- 1 Academic Department of Biomedicine and Prevention, Section of Gynecology and Obstetrics, University of Rome Tor Vergata and Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital , Rome, Italy .,2 Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital, Rome , Italy
| | - Barbara Rizzacasa
- 3 Department of Biomedicine and Prevention, Section of Genetics, University of Rome Tor Vergata , Rome, Italy
| | - Adalgisa Pietropolli
- 1 Academic Department of Biomedicine and Prevention, Section of Gynecology and Obstetrics, University of Rome Tor Vergata and Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital , Rome, Italy .,2 Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital, Rome , Italy
| | - Maria Vittoria Capogna
- 1 Academic Department of Biomedicine and Prevention, Section of Gynecology and Obstetrics, University of Rome Tor Vergata and Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital , Rome, Italy .,2 Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital, Rome , Italy
| | - Renato Massoud
- 4 Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Tor Vergata University Hospital , Rome, Italy
| | - Carlo Ticconi
- 1 Academic Department of Biomedicine and Prevention, Section of Gynecology and Obstetrics, University of Rome Tor Vergata and Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital , Rome, Italy .,2 Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital, Rome , Italy
| | - Emilio Piccione
- 1 Academic Department of Biomedicine and Prevention, Section of Gynecology and Obstetrics, University of Rome Tor Vergata and Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital , Rome, Italy .,2 Department of Surgery, Section of Gynecology and Obstetrics, Tor Vergata University Hospital, Rome , Italy
| | - Claudio Cortese
- 4 Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Tor Vergata University Hospital , Rome, Italy
| | - Giuseppe Novelli
- 3 Department of Biomedicine and Prevention, Section of Genetics, University of Rome Tor Vergata , Rome, Italy
| | - Francesca Amati
- 3 Department of Biomedicine and Prevention, Section of Genetics, University of Rome Tor Vergata , Rome, Italy
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LOX-1 and Its Splice Variants: A New Challenge for Atherosclerosis and Cancer-Targeted Therapies. Int J Mol Sci 2017; 18:ijms18020290. [PMID: 28146073 PMCID: PMC5343826 DOI: 10.3390/ijms18020290] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 01/15/2017] [Accepted: 01/23/2017] [Indexed: 12/13/2022] Open
Abstract
Alternative splicing (AS) is a process in which precursor messenger RNA (pre-mRNA) splicing sites are differentially selected to diversify the protein isoform population. Changes in AS patterns have an essential role in normal development, differentiation and response to physiological stimuli. It is documented that AS can generate both “risk” and “protective” splice variants that can contribute to the pathogenesis of several diseases including atherosclerosis. The main endothelial receptor for oxidized low-density lipoprotein (ox-LDLs) is LOX-1 receptor protein encoded by the OLR1 gene. When OLR1 undergoes AS events, it generates three variants: OLR1, OLR1D4 and LOXIN. The latter lacks exon 5 and two-thirds of the functional domain. Literature data demonstrate a protective role of LOXIN in pathologies correlated with LOX-1 overexpression such as atherosclerosis and tumors. In this review, we summarize recent developments in understanding of OLR1 AS while also highlighting data warranting further investigation of this process as a novel therapeutic target.
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Arjuman A, Chandra NC. Effect of IL-10 on LOX-1 expression, signalling and functional activity: an atheroprotective response. Diab Vasc Dis Res 2013; 10:442-51. [PMID: 23811604 DOI: 10.1177/1479164113489042] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) has gained attention for its pro-inflammatory potential in atherogenesis. This study evaluates LOX-1 receptor modulation in the presence of an atheroprotective cytokine, interleukin-10 (IL-10). Both oxidized low-density lipoprotein (oxLDL) and IL-10 stimulated LOX-1 cell surface expression on THP-1 macrophages. However, our study demonstrates differential roles of oxLDL and IL-10 on LOX-1 functionality. Seemingly, oxLDL-induced LOX-1 promoted pro-inflammatory signalling by increasing intracellular NO, a substrate for pro-inflammatory peroxynitrite. In contrast, IL-10-induced LOX-1 facilitated scavenging of extracellular oxLDL without any effect on pro-inflammatory signalling. The atheroprotective effects of IL-10 were demonstrated by both facilitation of cellular oxLDL uptake and expression of LOXIN, an atheroprotective haplotype of the LOX-1 gene. Thus, increased expression of IL-10 may help to attenuate the risk of atherosclerosis developed by pro-inflammatory signal(s) generated through the interaction of oxLDL with its cognate receptor LOX-1 on macrophages.
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Affiliation(s)
- Albina Arjuman
- Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India
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