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Váczi S, Barna L, Laczi K, Tömösi F, Rákhely G, Penke B, Fülöp L, Bogár F, Janáky T, Deli MA, Mezei Z. Effects of sub-chronic, in vivo administration of sigma-1 receptor ligands on platelet and aortic arachidonate cascade in streptozotocin-induced diabetic rats. PLoS One 2022; 17:e0265854. [PMID: 36395179 PMCID: PMC9671357 DOI: 10.1371/journal.pone.0265854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 09/28/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Diabetes mellitus is a chronic metabolic disorder which induces endothelial dysfunction and platelet activation. Eicosanoids produced from arachidonic acid regulate cellular and vascular functions. Sigma-1 receptors (S1R) are expressed in platelets and endothelial cells and S1R expression is protective in diabetes. OBJECTIVES Our aim was to examine the influence of sub-chronic, in vivo administered S1R ligands PRE-084, (S)-L1 (a new compound) and NE-100 on the ex vivo arachidonic acid metabolism of platelets and aorta in streptozotocin-induced diabetic rats. METHODS The serum level of the S1R ligands was detected by LC-MS/MS before the ex vivo analysis. Sigma-1 receptor and cyclooxygenase gene expression in platelets were determined by RT-qPCR. The eicosanoid synthesis was examined with a radiolabelled arachidonic acid substrate and ELISA. RESULTS One month after the onset of STZ-induced diabetes, in vehicle-treated, diabetic rat platelet TxB2 and aortic 6-k-PGF1α production dropped. Sub-chronic in vivo treatment of STZ-induced diabetes in rats for one week with PRE-084 enhanced vasoconstrictor and platelet aggregator and reduced vasodilator and anti-aggregator cyclooxygenase product formation. (S)-L1 reduced the synthesis of vasodilator and anti-aggregator cyclooxygenase metabolites and promoted the recovery of physiological platelet function in diabetic rats. The S1R antagonist NE-100 produced no significant changes in platelet arachidonic acid metabolism. (S)-L1 decreased the synthesis of vasoconstrictor and platelet aggregator cyclooxygenase metabolites, whereas NE-100 increased the quantity of aortic vasodilator and anti-aggregator cyclooxygenase products and promoted the recovery of diabetic endothelial dysfunction in the aorta. The novel S1R ligand, (S)-L1 had similar effects on eicosanoid synthesis in platelets as the agonist PRE-084 and in aortas as the antagonist NE-100. CONCLUSIONS S1R ligands regulate cellular functions and local blood circulation by influencing arachidonic acid metabolism. In diabetes mellitus, the cell-specific effects of S1R ligands have a compensatory role and aid in restoring physiological balance between the platelet and vessel.
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Affiliation(s)
- Sándor Váczi
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
- Doctoral School of Theoretical Medicine, University of Szeged, Szeged, Hungary
| | - Lilla Barna
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
- Doctoral School of Biology, University of Szeged, Szeged, Hungary
| | - Krisztián Laczi
- Department of Biotechnology, University of Szeged, Szeged, Hungary
| | - Ferenc Tömösi
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gábor Rákhely
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
- Department of Biotechnology, University of Szeged, Szeged, Hungary
| | - Botond Penke
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Lívia Fülöp
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ferenc Bogár
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Tamás Janáky
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Mária A. Deli
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Zsófia Mezei
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
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Szydełko-Gorzkowicz M, Poniedziałek-Czajkowska E, Mierzyński R, Sotowski M, Leszczyńska-Gorzelak B. The Role of Kisspeptin in the Pathogenesis of Pregnancy Complications: A Narrative Review. Int J Mol Sci 2022; 23:ijms23126611. [PMID: 35743054 PMCID: PMC9223875 DOI: 10.3390/ijms23126611] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/10/2022] [Accepted: 06/12/2022] [Indexed: 12/15/2022] Open
Abstract
Kisspeptins are the family of neuropeptide products of the KISS-1 gene that exert the biological action by binding with the G-protein coupled receptor 54 (GPR54), also known as the KISS-1 receptor. The kisspeptin level dramatically increases during pregnancy, and the placenta is supposed to be its primary source. The role of kisspeptin has already been widely studied in hypogonadotropic hypogonadism, fertility, puberty disorders, and insulin resistance-related conditions, including type 2 diabetes mellitus, polycystic ovary syndrome, and obesity. Gestational diabetes mellitus (GDM), preeclampsia (PE), preterm birth, fetal growth restriction (FGR), or spontaneous abortion affected 2 to 20% of pregnancies worldwide. Their occurrence is associated with numerous short and long-term consequences for mothers and newborns; hence, novel, non-invasive predictors of their development are intensively investigated. The study aims to present a comprehensive review emphasizing the role of kisspeptin in the most common pregnancy-related disorders and neonatal outcomes. The decreased level of kisspeptin is observed in women with GDM, FGR, and a high risk of spontaneous abortion. Nevertheless, there are still many inconsistencies in kisspeptin concentration in pregnancies with preterm birth or PE. Further research is needed to determine the usefulness of kisspeptin as an early marker of gestational and neonatal complications.
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Váczi S, Barna L, Laczi K, Tömösi F, Rákhely G, Penke B, Fülöp L, Bogár F, Janáky T, Deli MA, Mezei Z. Effects of sub-chronic, in vivo administration of sigma non-opioid intracellular receptor 1 ligands on platelet and aortic arachidonate cascade in rats. Eur J Pharmacol 2022; 925:174983. [PMID: 35487254 DOI: 10.1016/j.ejphar.2022.174983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 12/25/2022]
Abstract
Platelets regulate cell-cell interactions and local circulation through eicosanoids from arachidonic acid. Sigma non-opioid intracellular receptor 1 (sigma-1 receptor) expressed in platelets and endothelial cells can regulate intracellular signalization. Our aim was to examine the influence of sub-chronic, in vivo-administered sigma-1 receptor ligands 2-morpholin-4-ylethyl 1-phenylcyclohexane-1-carboxylate (PRE-084); N-benzyl-2-[(1S)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin-1-yl]ethan-1-amine; dihydrochloride, a new compound ((S)-L1); and N-[2-[4-methoxy-3-(2-phenylethoxy)phenyl]ethyl]-N-propylpropan-1-amine (NE-100) on the ex vivo arachidonic acid metabolism of the platelets and aorta of male rats. The serum level of sigma-1 receptor ligands was determined by liquid chromatography-mass spectrometry. Sigma-1 receptor and cyclooxygenase gene expression in the platelets were determined by a reverse transcription-coupled quantitative polymerase chain reaction. The eicosanoid synthesis was examined using a radiolabeled arachidonic acid substrate and enzyme-linked immunosorbent assay. We confirmed the absorption of sigma-1 receptor ligands and confirmed that the ligands were not present during the ex vivo studies, so their acute effect could be excluded. We detected no changes in either sigma-1 receptor or cyclooxygenase mRNA levels in the platelets. Nevertheless, (S)-L1 and NE-100 increased the quantity of cyclooxygenases there. Both platelet and aortic eicosanoid synthesis was modified by the ligands, although in different ways. The effect of the new sigma-1 receptor ligand, (S)-L1, was similar to that of PRE-084 in most of the parameters studied but was found to be more potent. Our results suggest that sigma-1 receptor ligands may act at multiple points in arachidonic acid metabolism and play an important role in the control of the microcirculation by modulating the eicosanoid synthesis of the platelets and vessels.
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Affiliation(s)
- Sándor Váczi
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary; Doctoral School of Theoretical Medicine, University of Szeged, H-6725, Szeged, Hungary.
| | - Lilla Barna
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network (ELKH), H-6725, Szeged, Hungary; Doctoral School of Biology, University of Szeged, H-6725, Szeged, Hungary.
| | - Krisztián Laczi
- Department of Biotechnology, University of Szeged, H-6725, Szeged, Hungary.
| | - Ferenc Tömösi
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary.
| | - Gábor Rákhely
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network (ELKH), H-6725, Szeged, Hungary; Department of Biotechnology, University of Szeged, H-6725, Szeged, Hungary.
| | - Botond Penke
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary.
| | - Lívia Fülöp
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary.
| | - Ferenc Bogár
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary; MTA-SZTE Biomimetic Systems Research Group, Eötvös Loránd Research Network (ELKH), H-6725, Szeged, Hungary.
| | - Tamás Janáky
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary.
| | - Mária A Deli
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network (ELKH), H-6725, Szeged, Hungary.
| | - Zsófia Mezei
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary; Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, H-6725, Szeged, Hungary.
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Váczi S, Barna L, Harazin A, Mészáros M, Porkoláb G, Zvara Á, Ónody R, Földesi I, Veszelka S, Penke B, Fülöp L, Deli MA, Mezei Z. S1R agonist modulates rat platelet eicosanoid synthesis and aggregation. Platelets 2021; 33:709-718. [PMID: 34697991 DOI: 10.1080/09537104.2021.1981843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Sigma-1 receptor (S1R) is detected in different cell types and can regulate intracellular signaling pathways. S1R plays a role in the pathomechanism of diseases and the regulation of neurotransmitters. Fluvoxamine can bind to S1R and reduce the serotonin uptake of neurons and platelets. We therefore hypothesized that platelets express S1R, which can modify platelet function. The expression of the SIGMAR1 gene in rat platelets was examined with a reverse transcription polymerase chain reaction and a quantitative polymerase chain reaction. The receptor was also visualized by immunostaining and confocal laser scanning microscopy. The effect of S1R agonist PRE-084 on the eicosanoid synthesis of isolated rat platelets and ADP- and AA-induced platelet aggregation was examined. S1R was detected in rat platelets both at gene and protein levels. Pretreatment with PRE-084 of resting platelets induced elevation of eicosanoid synthesis. The rate of elevation in thromboxane B2 and prostaglandin D2 synthesis was similar, but the production of prostaglandin E2 was higher. The concentration-response curve showed a sigmoidal form. The most effective concentration of the agonist was 2 µM. PRE-084 increased the quantity of cyclooxygenase-1 as detected by ELISA. PRE-084 also elevated the ADP- and AA-induced platelet aggregation. S1R of platelets might regulate physiological or pathological functions.
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Affiliation(s)
- Sándor Váczi
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary.,Doctoral School of Theoretical Medicine, University of Szeged, Szeged, Hungary.,Gedeon Richter Talentum Foundation Scholarship, Budapest, Hungary
| | - L Barna
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Doctoral School of Biology, University of Szeged, Szeged, Hungary
| | - A Harazin
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - M Mészáros
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - G Porkoláb
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Doctoral School of Biology, University of Szeged, Szeged, Hungary
| | - Á Zvara
- Institute of Genetics, Biological Research Centre, Szeged, Hungary
| | - R Ónody
- Department of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - I Földesi
- Department of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - S Veszelka
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - B Penke
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - L Fülöp
- Department of Medical Chemistry, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - M A Deli
- Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Z Mezei
- Department of Pathophysiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary.,Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
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Gorbunova OL, Shirshev SV. Role of Kisspeptin in Regulation of Reproductive and Immune Reactions. BIOCHEMISTRY (MOSCOW) 2021; 85:839-853. [PMID: 33045946 DOI: 10.1134/s0006297920080015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The work is focused on physiological role of the hormone kisspeptin produced by neurons of the hypothalamus anterior zone, which is a key regulator of reproduction processes. Role of the hormone in transmission of information on metabolic activity and induction of the secretion of gonadotropin-releasing hormone (GnRH) by the hypothalamus that determines gestation processes involving fertilization, placentation, fetal development, and child birth is considered. The literature data on molecular mechanisms and effects of kisspeptin on reproductive system including puberty initiation are summarized and analyzed. In addition, attention is paid to hormone-mediated changes in the cardiovascular system in pregnant women. For the first time, the review examines the effect of kisspeptin on functional activity of immune system cells presenting molecular mechanisms of the hormone signal transduction on the level of lymphoid cells that lead to the immune tolerance induction. In conclusion, a conceptual model is presented that determines the role of kisspeptin as an integrator of reproductive and immune functions during pregnancy.
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Affiliation(s)
- O L Gorbunova
- Perm Federal Research Center, Institute of Ecology and Genetics of Microorganisms, Ural Branch of the Russian Academy of Sciences, Perm, 614081, Russia.
| | - S V Shirshev
- Perm Federal Research Center, Institute of Ecology and Genetics of Microorganisms, Ural Branch of the Russian Academy of Sciences, Perm, 614081, Russia
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Watanabe T, Sato K. Roles of the kisspeptin/GPR54 system in pathomechanisms of atherosclerosis. Nutr Metab Cardiovasc Dis 2020; 30:889-895. [PMID: 32409274 DOI: 10.1016/j.numecd.2020.02.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/11/2019] [Accepted: 02/28/2020] [Indexed: 12/11/2022]
Abstract
AIMS Kisspeptin-10 (KP-10), a potent vasoconstrictor and inhibitor of angiogenesis, and its receptor, GPR54, have currently received much attention with respect to atherosclerosis, since both KP-10 and GPR54 are expressed at high levels in atheromatous plaques and restenotic lesions after wire-injury. The present review introduces the emerging roles of the KP-10/GPR54 system in atherosclerosis. DATA SYNTHESIS KP-10 suppresses migration and proliferation of human umbilical vein endothelial cells (HUVECs), and induces senescence in HUVECs. KP-10 increases adhesion of human monocytes to HUVECs. KP-10 also stimulates expression of interleukin-6, tumor necrosis factor-α, monocyte chemotactic protein-1, intercellular adhesion molecule-1, vascular cell adhesion molecule-1, and E-selectin genes in HUVECs. KP-10 enhances oxidized low-density lipoprotein-induced foam cell formation associated with upregulation of CD36 and acyl-coenzyme A: cholesterol acyltransferase-1 in human monocyte-derived macrophages. In human aortic smooth muscle cells, KP-10 suppresses angiotensin II-induced migration and proliferation, however, it enhances apoptosis and activities of matrix metalloproteinase (MMP)-2 and MMP-9 by upregulation of extracellular signal-regulated kinase 1/2, p38, Bax, and caspase-3. Four-week-infusion of KP-10 into Apoe-/- mice accelerates development of aortic atherosclerotic lesions with increased monocyte/macrophage infiltration and vascular inflammation, also, it decreases intraplaque vascular smooth muscle cell content. Proatherosclerotic effects of endogenous and exogenous KP-10 were completely attenuated upon infusion of P234, a GPR54 antagonist, in Apoe-/- mice. CONCLUSION These findings suggest that KP-10 may contribute to acceleration of progression and to the instability of atheromatous plaques, leading to rupture of plaques. This GPR54 antagonist may be useful for the prevention and treatment of atherosclerosis. Thus, the KP-10/GPR54 system may serve as a novel therapeutic target for atherosclerotic diseases.
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Affiliation(s)
- Takuya Watanabe
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan; Department of Internal Medicine, Ushioda General Hospital/Clinic, Yokohama, Japan.
| | - Kengo Sato
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan; Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo, Japan
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Mezei Z, Váczi S, Török V, Stumpf C, Ónody R, Földesi I, Szabó G. Effects of kisspeptin on diabetic rat platelets. Can J Physiol Pharmacol 2017; 95:1319-1326. [DOI: 10.1139/cjpp-2017-0036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Hyperglycemia, hyperlipidemia, and free radicals result in platelet activation and atherogenesis. Kisspeptin (KP) is able to regulate metabolism, hemostasis, and the development of atherosclerosis. We examined whether platelet aggregation of streptozotocin-induced diabetic rats depends on the inducer type and if KP-13 and RF-9 (a kisspeptin receptor modifier) can influence platelet function. We measured the speed and the maximum of aggregation, along with the area under the curve. Serum glucose and calcium levels and urine formation of diabetic animals increased, while the body mass and platelet count decreased. Collagen was the most effective inducer of platelet aggregation. The aggregability of nondiabetic platelets was elevated in the presence of 5 × 10−8 mol/L KP-13. This effect was less expressed in diabetic animals. The effectivity of RF-9 was stronger than that of KP-13 in nondiabetic platelets, however it was ineffective in diabetic animals. RF-9 pre-treatment did not change the effects of 5 × 10−8 mol/L KP-13 in either animal group. The in vivo activation of diabetic platelets, which may be due to elevated serum calcium, induces thrombocytopenia and may lead to reduced in vitro aggregability. We could not demonstrate the antagonistic effect of RF-9 against KP-13 in isolated platelets.
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Affiliation(s)
- Zsófia Mezei
- Department of Pathophysiology, University of Szeged, Semmelweis u. 1, 6725 Szeged, Hungary
| | - Sándor Váczi
- Department of Pathophysiology, University of Szeged, Semmelweis u. 1, 6725 Szeged, Hungary
| | - Viktória Török
- Department of Pathophysiology, University of Szeged, Semmelweis u. 1, 6725 Szeged, Hungary
| | - Csaba Stumpf
- Department of Pathophysiology, University of Szeged, Semmelweis u. 1, 6725 Szeged, Hungary
| | - Rita Ónody
- Institute of Laboratory Medicine, University of Szeged, Semmelweis u. 6, 6725 Szeged, Hungary
| | - Imre Földesi
- Institute of Laboratory Medicine, University of Szeged, Semmelweis u. 6, 6725 Szeged, Hungary
| | - Gyula Szabó
- Department of Pathophysiology, University of Szeged, Semmelweis u. 1, 6725 Szeged, Hungary
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Sato K, Shirai R, Hontani M, Shinooka R, Hasegawa A, Kichise T, Yamashita T, Yoshizawa H, Watanabe R, Matsuyama TA, Ishibashi-Ueda H, Koba S, Kobayashi Y, Hirano T, Watanabe T. Potent Vasoconstrictor Kisspeptin-10 Induces Atherosclerotic Plaque Progression and Instability: Reversal by its Receptor GPR54 Antagonist. J Am Heart Assoc 2017; 6:JAHA.117.005790. [PMID: 28411243 PMCID: PMC5533042 DOI: 10.1161/jaha.117.005790] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Background Kisspeptin‐10 (KP‐10), a potent vasoconstrictor and inhibitor of angiogenesis, and its receptor, GPR54, have currently received much attention in relation to pre‐eclampsia. However, it still remains unknown whether KP‐10 could affect atherogenesis. Methods and Results We evaluated the effects of KP‐10 on human umbilical vein endothelial cells, human monocyte‐derived macrophages, human aortic smooth muscle cells in vitro, and atherosclerotic lesions in apolipoprotein E–deficient (ApoE−/−) mice in vivo. KP‐10 significantly increased the adhesion of human monocytes to human umbilical vein endothelial cells, which was significantly inhibited by pretreatment with P234, a GPR54 antagonist. KP‐10 stimulated mRNA expression of tumor necrosis factor‐α, interleukin‐6, monocyte chemotactic protein‐1, intercellular adhesion molecule‐1, vascular adhesion molecule‐1, and E‐selectin in human umbilical vein endothelial cells. KP‐10 significantly enhanced oxidized low‐density lipoprotein–induced foam cell formation associated with upregulation of CD36 and acyl‐CoA:cholesterol acyltransferase‐1 in human monocyte‐derived macrophages. In human aortic smooth muscle cells, KP‐10 significantly suppressed angiotensin II–induced migration and proliferation, but enhanced apoptosis and activities of matrix metalloproteinase (MMP)‐2 and MMP‐9 by upregulation of extracellular signal‐regulated kinase 1 and 2, p38, Bcl‐2‐associated X protein, and caspase‐3. Four‐week‐infusion of KP‐10 into ApoE−/− mice significantly accelerated the development of aortic atherosclerotic lesions with increased monocyte/macrophage infiltration and vascular inflammation as well as decreased intraplaque vascular smooth muscle cells contents. Proatherosclerotic effects of endogenous and exogenous KP‐10 were completely canceled by P234 infusion in ApoE−/− mice. Conclusions Our results suggest that KP‐10 may contribute to accelerate the progression and instability of atheromatous plaques, leading to plaque rupture. The GPR54 antagonist may be useful for prevention and treatment of atherosclerosis. Thus, the KP‐10/GPR54 system may serve as a novel therapeutic target for atherosclerotic diseases.
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Affiliation(s)
- Kengo Sato
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Remina Shirai
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Mina Hontani
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Rina Shinooka
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Akinori Hasegawa
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Tomoki Kichise
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Tomoyuki Yamashita
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hayami Yoshizawa
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Rena Watanabe
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Taka-Aki Matsuyama
- Department of Pathology, National Cerebral and Cardiovascular Center, Osaka, Japan
| | | | - Shinji Koba
- Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Youichi Kobayashi
- Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Tsutomu Hirano
- Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Tokyo, Japan
| | - Takuya Watanabe
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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