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Horikami D, Sekihachi E, Omori K, Kobayashi Y, Kobayashi K, Nagata N, Kurata K, Uemura A, Murata T. Roles of lipocalin-type and hematopoietic prostaglandin D synthases in mouse retinal angiogenesis. J Lipid Res 2023; 64:100439. [PMID: 37666361 PMCID: PMC10571029 DOI: 10.1016/j.jlr.2023.100439] [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: 03/23/2023] [Revised: 08/19/2023] [Accepted: 08/22/2023] [Indexed: 09/06/2023] Open
Abstract
Normal angiogenesis is essential for retinal development and maintenance of visual function in the eye, and its abnormality can cause retinopathy and other eye diseases. Prostaglandin D2 is an anti-angiogenic lipid mediator produced by lipocalin-type PGD synthase (L-PGDS) or hematopoietic PGD synthase (H-PGDS). However, the exact role of these PGD synthases remains unclear. Therefore, we compared the roles of these synthases in murine retinal angiogenesis under physiological and pathological conditions. On postnatal day (P) 8, the WT murine retina was covered with an elongated vessel. L-PGDS deficiency, but not H-PGDS, reduced the physiological vessel elongation with sprouts increase. L-PGDS expression was observed in endothelial cells and neural cells. In vitro, L-PGDS inhibition increased the hypoxia-induced vascular endothelial growth factor expression in isolated endothelial cells, inhibited by a prostaglandin D2 metabolite, 15-deoxy-Δ12,14 -PGJ2 (15d-PGJ2) treatment. Pericyte depletion, using antiplatelet-derived growth factor receptor-β antibody, caused retinal hemorrhage with vessel elongation impairment and macrophage infiltration in the WT P8 retina. H-PGDS deficiency promoted hemorrhage but inhibited the impairment of vessel elongation, while L-PGDS did not. In the pericyte-depleted WT retina, H-PGDS was expressed in the infiltrated macrophages. Deficiency of the D prostanoid receptor also inhibited the vessel elongation impairment. These results suggest the endogenous role of L-PGDS signaling in physiological angiogenesis and that of H-PGDS/D prostanoid 1 signaling in pathological angiogenesis.
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Affiliation(s)
- Daiki Horikami
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Erika Sekihachi
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Keisuke Omori
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yui Kobayashi
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Koji Kobayashi
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Nanae Nagata
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kaori Kurata
- Department of Retinal Vascular Biology, Nagoya City University Graduate School of Medical Sciences, Mizuho-ku, Nagoya, Japan
| | - Akiyoshi Uemura
- Department of Retinal Vascular Biology, Nagoya City University Graduate School of Medical Sciences, Mizuho-ku, Nagoya, Japan
| | - Takahisa Murata
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
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Ma Y, Li X, Liu Z, Xue X, Wang Y, Ma Y. HIF-1α-PPARγ-mTORC1 signaling pathway-mediated autophagy induces inflammatory response in pancreatic cells in rats with hyperlipidemic acute pancreatitis. Mol Biol Rep 2023; 50:8497-8507. [PMID: 37644373 DOI: 10.1007/s11033-023-08639-3] [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: 01/28/2023] [Accepted: 06/26/2023] [Indexed: 08/31/2023]
Abstract
OBJECTIVE The incidence of hyperlipidemic acute pancreatitis (HLAP) has rapidly increased in recent years in China. Autophagy has been implicated in the inflammatory response of pancreatic cells in HLAP, but the molecular mechanisms remain unclear. METHODS In this study, the role of HIF-1α-PPARγ-mTORC1 pathway-mediated autophagy in the inflammatory response of pancreatic cells and the underlying molecular mechanism were investigated in a rat model of HLAP using immunohistochemistry, ELISA, electron microscopy, and western blot analysis. RESULTS The results revealed that autophagy was significantly increased and pancreatic injury was exacerbated in HLAP rats, and the inflammatory response was further exacerbated by treatment with rapamycin but relieved by treatment with 3-MA. Hyperlipidemia induced upregulation of HIF-1α and downregulation of PPARγ, which in turn led to an increase in autophagy and consequently exacerbation of the inflammatory response of pancreatic cells. CONCLUSIONS HIF-1α-PPARγ-mTORC1 pathway-mediated autophagy plays a critical role in the inflammatory response of pancreatic cells in HLAP, and interference with the HIF-1α-PPARγ-mTOR pathway can serve as a new strategy for the prevention and treatment of HLAP.
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Affiliation(s)
- Yumei Ma
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
- Digestive Department of Qinghai Provincial People's Hospital, Xining, 810007, China
| | - Xiaolin Li
- Digestive Department of Qinghai Provincial People's Hospital, Xining, 810007, China
| | - Zhilan Liu
- Digestive Department of Qinghai Provincial People's Hospital, Xining, 810007, China
| | - Xiaohong Xue
- Digestive Department of Qinghai Provincial People's Hospital, Xining, 810007, China
| | - Yaping Wang
- Wuxi Huishan District People's Hospital, Wuxi, 214187, Jiangsu, China.
| | - Yingcai Ma
- Digestive Department of Qinghai Provincial People's Hospital, Xining, 810007, China
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Cholecystokinin Octapeptide Promotes ANP Secretion through Activation of NOX4-PGC-1 α-PPAR α/PPAR γ Signaling in Isolated Beating Rat Atria. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:5905374. [PMID: 35770043 PMCID: PMC9236793 DOI: 10.1155/2022/5905374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 05/15/2022] [Accepted: 05/19/2022] [Indexed: 11/18/2022]
Abstract
Atrial natriuretic peptide (ANP), a canonical cardiac hormone, is mainly secreted from atrial myocytes and is involved in the regulation of body fluid, blood pressure homeostasis, and antioxidants. Cholecystokinin (CCK) is also found in cardiomyocytes as a novel cardiac hormone and induces multiple cardiovascular regulations. However, the direct role of CCK on the atrial mechanical dynamics and ANP secretion is unclear. The current study was to investigate the effect of CCK octapeptide (CCK-8) on the regulation of atrial dynamics and ANP secretion. Experiments were performed in isolated perfused beating rat atria. ANP was measured using radioimmunoassay. The levels of hydrogen peroxide (H2O2) and arachidonic acid (AA) were determined using ELISA Kits. The levels of relative proteins and mRNA were detected by Western blot and RT-qPCR. The results showed that sulfated CCK-8 (CCK-8s) rather than desulfated CCK-8 increased the levels of phosphorylated cytosolic phospholipase A2 and AA release through activation of CCK receptors. This led to the upregulation of NADPH oxidase 4 (NOX4) expression levels and H2O2 production and played a negative inotropic effect on atrial mechanical dynamics via activation of ATP-sensitive potassium channels and large-conductance calcium-activated potassium channels. In addition, CCK-8s-induced NOX4 subsequently upregulated peroxisome proliferator-activated receptor γ (PPARγ) coactivator-1α (PGC-1α) expression levels through activation of p38 mitogen-activated protein kinase as well as the serine/threonine kinase signaling, ultimately promoting the secretion of ANP via activation of PPARα and PPARγ. In the presence of the ANP receptor inhibitor, the CCK-8-induced increase of AA release, H2O2 production, and the upregulation of NOX4 and CAT expressions was augmented but the SOD expression induced by CCK-8s was repealed. These findings indicate that CCK-8s promotes the secretion of ANP through activation of NOX4-PGC-1α-PPARα/PPARγ signaling, in which ANP is involved in resistance for NOX4 expression and ROS production and regulation of SOD expression.
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Hu S, Ren S, Cai Y, Liu J, Han Y, Zhao Y, Yang J, Zhou X, Wang X. Glycoprotein PTGDS promotes tumorigenesis of diffuse large B-cell lymphoma by MYH9-mediated regulation of Wnt-β-catenin-STAT3 signaling. Cell Death Differ 2022; 29:642-656. [PMID: 34743203 PMCID: PMC8901925 DOI: 10.1038/s41418-021-00880-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 09/20/2021] [Indexed: 02/06/2023] Open
Abstract
Glycoprotein prostaglandin D2 synthase (PTGDS) is a member of the lipocalin superfamily and plays dual roles in prostaglandins metabolism and lipid transport. PTGDS has been involved in various cellular processes including the tumorigenesis of solid tumors, yet its role in carcinogenesis is contradictory and the significance of PTGDS in hematological malignancies is ill-defined. Here, we aimed to explore the expression and function of PTGDS in diffuse large B-cell lymphoma (DLBCL), especially the potential role of PTGDS inhibitor, AT56, in lymphoma therapy. Remarkable high expression of PTGDS was found in DLBCL, which was significantly correlated with poor prognosis. PTGDS overexpression and rhPTGDS were found to promote cell proliferation. Besides, in vitro and in vivo studies indicated that PTGDS knockdown and AT56 treatment exerted an anti-tumor effect by regulating cell viability, proliferation, apoptosis, cell cycle, and invasion, and enhanced the drug sensitivity to adriamycin and bendamustine through promoting DNA damage. Moreover, the co-immunoprecipitation-based mass spectrum identified the interaction between PTGDS and MYH9, which was found to promote DLBCL progression. PTGDS inhibition led to reduced expression of MYH9, and then declined activation of the Wnt-β-catenin-STAT3 pathway through influencing the ubiquitination and degradation of GSK3-β in DLBCL. The rescue experiment demonstrated that PTGDS exerted an oncogenic role through regulating MYH9 and then the Wnt-β-catenin-STAT3 pathway. Based on point mutation of glycosylation sites, we confirmed the N-glycosylation of PTGDS in Asn51 and Asn78 and found that abnormal glycosylation of PTGDS resulted in its nuclear translocation, prolonged half-life, and enhanced cell proliferation. Collectively, our findings identified for the first time that glycoprotein PTGDS promoted tumorigenesis of DLBCL through MYH9-mediated regulation of Wnt-β-catenin-STAT3 signaling, and highlighted the potential role of AT56 as a novel therapeutic strategy for DLBCL treatment.
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Affiliation(s)
- Shunfeng Hu
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Shuai Ren
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Yiqing Cai
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Jiarui Liu
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Yang Han
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Yi Zhao
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Juan Yang
- grid.27255.370000 0004 1761 1174Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021 Jinan, Shandong China
| | - Xiangxiang Zhou
- Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021, Jinan, Shandong, China. .,Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 250021, Jinan, Shandong, China. .,School of Medicine, Shandong University, 250012, Jinan, Shandong, China. .,Shandong Provincial Engineering Research Center of Lymphoma, 250021, Jinan, Shandong, China. .,Branch of National Clinical Research Center for Hematologic Diseases, 250021, Jinan, Shandong, China. .,National Clinical Research Center for Hematologic Diseases, The First Affiliated Hospital of Soochow University, 251006, Suzhou, China.
| | - Xin Wang
- Department of Hematology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 250021, Jinan, Shandong, China. .,Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 250021, Jinan, Shandong, China. .,School of Medicine, Shandong University, 250012, Jinan, Shandong, China. .,Shandong Provincial Engineering Research Center of Lymphoma, 250021, Jinan, Shandong, China. .,Branch of National Clinical Research Center for Hematologic Diseases, 250021, Jinan, Shandong, China. .,National Clinical Research Center for Hematologic Diseases, The First Affiliated Hospital of Soochow University, 251006, Suzhou, China.
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Urade Y. Biochemical and Structural Characteristics, Gene Regulation, Physiological, Pathological and Clinical Features of Lipocalin-Type Prostaglandin D 2 Synthase as a Multifunctional Lipocalin. Front Physiol 2021; 12:718002. [PMID: 34744762 PMCID: PMC8569824 DOI: 10.3389/fphys.2021.718002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 09/01/2021] [Indexed: 11/13/2022] Open
Abstract
Lipocalin-type prostaglandin (PG) D2 synthase (L-PGDS) catalyzes the isomerization of PGH2, a common precursor of the two series of PGs, to produce PGD2. PGD2 stimulates three distinct types of G protein-coupled receptors: (1) D type of prostanoid (DP) receptors involved in the regulation of sleep, pain, food intake, and others; (2) chemoattractant receptor-homologous molecule expressed on T helper type 2 cells (CRTH2) receptors, in myelination of peripheral nervous system, adipocyte differentiation, inhibition of hair follicle neogenesis, and others; and (3) F type of prostanoid (FP) receptors, in dexamethasone-induced cardioprotection. L-PGDS is the same protein as β-trace, a major protein in human cerebrospinal fluid (CSF). L-PGDS exists in the central nervous system and male genital organs of various mammals, and human heart; and is secreted into the CSF, seminal plasma, and plasma, respectively. L-PGDS binds retinoic acids and retinal with high affinities (Kd < 100 nM) and diverse small lipophilic substances, such as thyroids, gangliosides, bilirubin and biliverdin, heme, NAD(P)H, and PGD2, acting as an extracellular carrier of these substances. L-PGDS also binds amyloid β peptides, prevents their fibril formation, and disaggregates amyloid β fibrils, acting as a major amyloid β chaperone in human CSF. Here, I summarize the recent progress of the research on PGD2 and L-PGDS, in terms of its “molecular properties,” “cell culture studies,” “animal experiments,” and “clinical studies,” all of which should help to understand the pathophysiological role of L-PGDS and inspire the future research of this multifunctional lipocalin.
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Affiliation(s)
- Yoshihiro Urade
- Center for Supporting Pharmaceutical Education, Daiichi University of Pharmacy, Fukuoka, Japan.,Isotope Science Center, The University of Tokyo, Tokyo, Japan
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Li X, Han ZN, Liu Y, Hong L, Cui BR, Cui X. Endogenous ET-1 promotes ANP secretion through activation of COX2-L-PGDS-PPARγ signaling in hypoxic beating rat atria. Peptides 2019; 122:170150. [PMID: 31541683 DOI: 10.1016/j.peptides.2019.170150] [Citation(s) in RCA: 5] [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: 07/19/2019] [Revised: 08/30/2019] [Accepted: 09/02/2019] [Indexed: 12/29/2022]
Abstract
Endothelin-1 (ET-1) is a potent stimulus for the secretion of atrial natriuretic peptide (ANP) and hypoxia stimulates the release of ET-1, which is involved in the regulation of atrial ANP secretion. However, the precise mechanism of endogenous ET-1 in the regulation of hypoxia-induced ANP secretion is unclear. Therefore, this study aimed to investigate the mechanism of hypoxia-induced endogenous ET-1 regulation of ANP secretion in isolated perfused hypoxic beating rat atria. The results of this study showed that acute hypoxia significantly stimulated ET-1 release and upregulated the expression of its type A as well as type B receptors (ETA and ETB receptors). Endogenous ET-1 induced by hypoxia markedly upregulated the expression of cyclooxygenase 2 (COX2) through activation of its two receptors, leading to an increase in lipocalin-type prostaglandin D synthase (L-PGDS) expression and prostaglandin D2 (PGD2) production. L-PGDS-derived PGD2 activated peroxisome proliferator-activated receptor γ (PPARγ), ultimately promoting hypoxia-induced ANP secretion. Conversely, L-PGDS-derived PGD2 may in turn regulate L-PGDS expression by a nuclear factor erythroid-2-related factor 2 (NRF2)-mediated feedback mechanism. These results indicate that endogenous ET-1 induced by hypoxia promotes hypoxia-induced ANP secretion by activation of COX2-L-PGDS-PPARγ signaling in beating rat atria. In addition, the positive feedback loop between L-PGDS-derived PGD2 and L-PGDS expression induced by hypoxia is part of the mechanism of hypoxia-induced ANP secretion by endogenous ET-1.
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Affiliation(s)
- Xiang Li
- Department of Physiology, School of Medical Sciences, Yanbian University, Yanji, 133-002, China
| | - Zhuo-Na Han
- Department of Physiology, School of Medical Sciences, Yanbian University, Yanji, 133-002, China
| | - Ying Liu
- Department of Physiology, School of Medical Sciences, Yanbian University, Yanji, 133-002, China
| | - Lan Hong
- Department of Physiology, School of Medical Sciences, Yanbian University, Yanji, 133-002, China
| | - Bai-Ri Cui
- Institute of Clinical Medicine, Yanbian University, Yanji, 133-000, China.
| | - Xun Cui
- Department of Physiology, School of Medical Sciences, Yanbian University, Yanji, 133-002, China; Key Laboratory of Organism Functional Factors of the Changbai Mountain, Ministry of Education, Yanbian University, Yanji, 133-002, China; Cellular Function Research Center, Yanbian University, Yanji, 133-002, China.
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Yu L, Li W, Park BM, Lee GJ, Kim SH. Hypoxia augments NaHS-induced ANP secretion via KATP channel, HIF-1α and PPAR-γ pathway. Peptides 2019; 121:170123. [PMID: 31386893 DOI: 10.1016/j.peptides.2019.170123] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/16/2019] [Accepted: 07/31/2019] [Indexed: 02/07/2023]
Abstract
It has been reported that sodium hydrosulfide (NaHS) stimulated high stretch induced-atrial natriuretic peptide (ANP) secretion via ATP sensitive potassium (KATP) channel. KATP channel is activated during hypoxic condition as a compensatory mechanism. However, whether NaHS affects ANP secretion during hypoxia remains obscure. The purpose of the present study is to discover the impact of NaHS on ANP secretion during hypoxia and to unravel its signaling pathway. Isolated beating rat atria were perfused with buffer exposed to different O2 tension (to 100% O2, normoxia; to 20% O2, hypoxia). The ANP secretion increased negatively correlated with O2 tension. NaHS (50 μM) did not show any significant effect on low stretch induced-ANP secretion in normoxic condition but augmented low stretch induced-ANP secretion in hypoxic condition. The augmentation of NaHS-induced ANP secretion during hypoxia was blocked by the pretreatment with KATP channel blocker (glibenclamide) and was enhanced by the pretreatment with KATP channel activator (pinacidil). Hypoxia increased the expression of PPAR-γ protein but did not change the expression of HIF-1α protein and eNOS phosphorylation. The NaHS-induced ANP secretion during hypoxia was also blocked by the pretreatment with HIF-1α inhibitor (2-methoxy- estradiol), PPAR-γ inhibitor (GW9662) but not by NOS inhibitor (L-NAME) and endothelin receptor inhibitor (bosentan). The intravenous infusion of NaHS increased plasma ANP level in monocrotaline-treated rats but not in sham rats. These results suggest that hypoxia augmented NaHS-induced ANP secretion partly through KATP channel, HIF-1α, and PPAR-γ pathway.
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Affiliation(s)
- Lamei Yu
- Department of Physiology, Binzhou Medical University, China; Department of Physiology, Chonbuk National University Medical School, Jeonju 54907, Republic of Korea
| | - Weijian Li
- Department of Physiology, Chonbuk National University Medical School, Jeonju 54907, Republic of Korea
| | - Byung Mun Park
- Department of Physiology, Chonbuk National University Medical School, Jeonju 54907, Republic of Korea
| | - Gi-Ja Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Suhn Hee Kim
- Department of Physiology, Chonbuk National University Medical School, Jeonju 54907, Republic of Korea.
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