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Bai YP, Yao BC, Wang M, Liu XK, Zhu XL, Wang LQ, Jiang N, Guo ZG, Chen QL. BPI and KIR6.1 as significant hub genes for vein graft restenosis. J Int Med Res 2020; 48:300060520969331. [PMID: 33259239 PMCID: PMC7711236 DOI: 10.1177/0300060520969331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Vein graft restenosis (VGR), which appears to be caused by dyslipidemia
following vascular transplantation, seriously affects the prognosis and
long-term quality of life of patients. Methods This study analyzed the genetic data of restenosis (VGR group) and
non-stenosis (control group) vessels from patients with coronary heart
disease post-vascular transplantation and identified hub genes that might be
responsible for its occurrence. GSE110398 was downloaded from the Gene
Expression Omnibus database. A repeatability test for the GSE110398 dataset
was performed using R language. This included the identification of
differentially expressed genes (DEGs), enrichment analysis via Metascape
software, pathway enrichment analysis, and construction of a protein–protein
interaction network and a hub gene network. Results Twenty-four DEGs were identified between VGR and control groups. The four
most important hub genes (KIR6.1, PCLP1,
EDNRB, and BPI) were identified, and
Pearson’s correlation coefficient showed that KIR6.1 and
BPI were significantly correlated with VGR.
KIR6.1 could also sensitively predict VGR
(0.9 < area under the curve ≤1). Conclusion BPI and KIR6.1 were differentially
expressed in vessels with and without stenosis after vascular
transplantation, suggesting that these genes or their encoded proteins may
be involved in the occurrence of VGR.
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Affiliation(s)
- Yun-Peng Bai
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Bo-Chen Yao
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Mei Wang
- Department of Dermatology, Tianjin First Central Hospital, Tianjin, P. R. China
| | - Xian-Kun Liu
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Xiao-Long Zhu
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Lian-Qun Wang
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Nan Jiang
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Zhi-Gang Guo
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
| | - Qing-Liang Chen
- Department of Cardiac Surgery, Tianjin Chest Hospital, Tianjin, P. R. China
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Zhao Y, Ge J, Li X, Guo Q, Zhu Y, Song J, Zhang L, Ding S, Yang X, Li R. Vasodilatory effect of formaldehyde via the NO/cGMP pathway and the regulation of expression of K ATP, BK Ca and L-type Ca 2+ channels. Toxicol Lett 2019; 312:55-64. [PMID: 30974163 DOI: 10.1016/j.toxlet.2019.04.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 03/28/2019] [Accepted: 04/06/2019] [Indexed: 12/12/2022]
Abstract
Formaldehyde (FA), a well-known toxic gas molecule similar to nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H2S), is widely produced endogenously via numerous biochemical pathways, and has a number of physiological roles in the biosystem. We attempted to investigate the vasorelaxant effects of FA and their underlying mechanisms. We found that FA induced vasorelaxant effects on rat aortic rings in a concentration-dependent manner. The NO/cyclic guanosine 5' monophosphate (cGMP) pathway was up-regulated when the rat aortas were treated with FA. The expression of large-conductance Ca2+-activated K+ (BKCa) channel subunits α and β of the rat aortas was increased by FA. Similarly, the levels of ATP-sensitive K+ (KATP) channel subunits Kir6.1 and Kir6.2 were also up-regulated when the rat aortas were incubated with FA. In contrast, levels of the L-type Ca2+ channel (LTCC) subunits, Cav1.2 and Cav1.3, decreased dramatically with increasing concentrations of FA. We demonstrated that the regulation of FA on vascular contractility may be via the up-regulation of the NO/cGMP pathway and the modulation of ion channels, including the upregulated expression of the KATP and BKCa channels and the inhibited expression of LTCCs. Further study is needed to explore the in-depth mechanisms of FA induced vasorelaxation.
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Affiliation(s)
- Yun Zhao
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China
| | - Jing Ge
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China
| | - Xiaoxiao Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China
| | - Qing Guo
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China; School of Public Health, Huazhong University of Science and Technology, Hangkong Road, Wuhan, 430030, PR China
| | - Yuqing Zhu
- Centre of Stem Cell and Regenerative medicine, School of Medicine, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, PR China
| | - Jing Song
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China
| | - Luoping Zhang
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA, 94720, USA
| | - Shumao Ding
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China
| | - Xu Yang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China.
| | - Rui Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, 152 Luoyu Road, Wuhan 430079, PR China.
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Uchida K, Nomura M, Yamamoto T, Ogawa Y, Teramoto N. Rab8a is involved in membrane trafficking of Kir6.2 in the MIN6 insulinoma cell line. Pflugers Arch 2019; 471:877-887. [PMID: 30631919 DOI: 10.1007/s00424-018-02252-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/05/2018] [Accepted: 12/27/2018] [Indexed: 11/29/2022]
Abstract
Although ATP-sensitive K+ (KATP) channels play an important role in the secretion of insulin by pancreatic beta cells, the mechanisms that regulate the intracellular transport of KATP channel subunit proteins (i.e., Kir6.2 and sulfonylurea receptor 1 (SUR1)) to the plasma membrane remain uncharacterized. We investigated the possibility that an interaction between KATP channel subunit proteins and Rab8a protein, a member of the RAS superfamily, may be involved in the membrane trafficking of KATP channels. Co-immunoprecipitation and immunostaining experiments using co-expression systems with fluorescent protein-tagged Kir6.2 were carried out to identify the coupling of KATP channels and Rab8a proteins in the insulin-secreting cell line, MIN6. Rab8a protein co-localized with Kir6.2 protein, a channel pore subunit (in a granular pattern), and with insulin. Knockdown of the Rab8a gene with RNA interference using small interfering RNA systems caused reductions in the amount of total KATP and plasma membrane surface KATP channels without decreasing the messenger RNA transcription of the KATP channel subunits. Rab8a gene knockdown also enhanced glucose-induced insulin secretion. These results suggest that Rab8a may be involved in membrane trafficking of KATP channels and the maintenance of normal insulin secretion in the MIN6 pancreatic beta cell line.
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Affiliation(s)
- Keiichiro Uchida
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga, 849-8501, Japan.,Department of Medicine and Bioregulatory Science, Graduate School of Medical Science, Kyushu University, Fukuoka, 812-8582, Japan
| | - Masatoshi Nomura
- Division of Endocrinology and Metabolism, Department of Internal Medicine, School of Medicine, Kurume University, Kurume, 830-0011, Japan
| | - Tadashi Yamamoto
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga, 849-8501, Japan
| | - Yoshihiro Ogawa
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Science, Kyushu University, Fukuoka, 812-8582, Japan.,Department of Molecular and Cellular Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Noriyoshi Teramoto
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga, 849-8501, Japan. .,Laboratory of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.
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Abstract
Veins exhibit spontaneous contractile activity, a phenomenon generally termed vasomotion. This is mediated by spontaneous rhythmical contractions of mural cells (i.e. smooth muscle cells (SMCs) or pericytes) in the wall of the vessel. Vasomotion occurs through interconnected oscillators within and between mural cells, entraining their cycles. Pharmacological studies indicate that a key oscillator underlying vasomotion is the rhythmical calcium ion (Ca2+) release-refill cycle of Ca2+ stores. This occurs through opening of inositol 1,4,5-trisphosphate receptor (IP3R)- and/or ryanodine receptor (RyR)-operated Ca2+ release channels in the sarcoplasmic/endoplasmic (SR/ER) reticulum and refilling by the SR/ER reticulum Ca2+ATPase (SERCA). Released Ca2+ from stores near the plasma membrane diffuse through the cytosol to open Ca2+-activated chloride (Cl-) channels, this generating inward current through an efflux of Cl-. The resultant depolarisation leads to the opening of voltage-dependent Ca2+ channels and possibly increased production of IP3, which through Ca2+-induced Ca2+ release (CICR) of IP3Rs and/or RyRs and IP3R-mediated Ca2+ release provide a means by which store oscillators entrain their activity. Intercellular entrainment normally involves current flow through gap junctions that interconnect mural cells and in many cases this is aided by additional connectivity through the endothelium. Once entrainment has occurred the substantial Ca2+ entry that results from the near-synchronous depolarisations leads to rhythmical contractions of the mural cells, this often leading to vessel constriction. The basis for venous/venular vasomotion has yet to be fully delineated but could improve both venous drainage and capillary/venular absorption of blood plasma-associated fluids.
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Yamamoto T, Takahara K, Uchida K, Teramoto N. ZD0947, a sulphonylurea receptor modulator, detects functional sulphonylurea receptor subunits in murine vascular smooth muscle ATP-sensitive K + channels. Eur J Pharmacol 2017; 800:34-39. [PMID: 28213290 DOI: 10.1016/j.ejphar.2017.02.023] [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: 11/24/2016] [Revised: 02/13/2017] [Accepted: 02/13/2017] [Indexed: 10/20/2022]
Abstract
In order to identify functional sulphonylurea receptor (SUR.x) subunits of native ATP-sensitive K+ channels (KATP channels) in mouse portal vein, the effects of ZD0947, a SUR.x modulator, were investigated on spontaneous portal vein contractions, macroscopic membrane currents and unitary currents recorded (using patch-clamp techniques) in freshly dispersed mouse portal vein myocytes. Spontaneous contractions in mouse portal vein were reversibly reduced by ZD0947 in a concentration-dependent manner (Ki =293nM). The relaxation elicited by 3µM ZD0947 was antagonized by the additional application of glibenclamide (300nM), but not gliclazide (100-300nM). In the conventional whole-cell configuration, 100µM ZD0947 elicited inward glibenclamide-sensitive currents at a holding potential of -60mV that demonstrated selectivity for K+(i.e. KATP currents). The peak amplitude of the membrane current elicited by 30µM or 100µM ZD0947 was smaller than that elicited by 100µM pinacidil at -60mV. In the cell-attached mode, 100µM ZD0947 activated glibenclamide-sensitive K+ channels with a conductance (35 pS) similar to that of recombinant Kir6.1/SUR2B channels that were expressed in HEK293 cells and activated by 100µM ZD0947. These results demonstrate that ZD0947 caused a significant vascular relaxation through the activation of KATP channels and that SUR2B may be the major functional subunit of SUR.x in mouse portal vein KATP channels, based on its pharmacological selectivity.
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Affiliation(s)
- Tadashi Yamamoto
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Kohei Takahara
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Keiichiro Uchida
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Noriyoshi Teramoto
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; Laboratory of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8575, Japan.
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Mori K, Yamashita Y, Teramoto N. Effects of ZD0947, a novel and potent ATP-sensitive K + channel opener, on smooth muscle-type ATP-sensitive K + channels. Eur J Pharmacol 2016; 791:773-779. [PMID: 27693800 DOI: 10.1016/j.ejphar.2016.09.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 09/13/2016] [Accepted: 09/28/2016] [Indexed: 10/20/2022]
Abstract
The effects of ZD0947, a novel ATP-sensitive K+ channel (KATP channel) opener, on the activity of reconstituted KATP channels were investigated using cell-attached recordings. KATP channels were studied in HEK 293 cells by co-expression of inwardly rectifying-6 family K+ channel subunits (Kir6.x: Kir6.1 and Kir6.2) with 3 different types of sulphonylurea receptors (SUR.x: SUR1, SUR2A and SUR2B). ZD0947 (100µM) activated SUR2B/Kir6.2 channels in a concentration-dependent manner, but caused only weak activation of SUR1/Kir6.2 channels and SUR2A/Kir6.2 channels expressed in HEK 293 cells. ZD0947 reversibly suppressed diazoxide-elicited SUR1/Kir6.2 channels activity and pinacidil-elicited SUR2A/Kir6.2 channel activity. However, ZD0947 did not affect SUR2B/Kir6.2 channels fully activated by 100µM pinacidil. ZD0947 had little inhibitory effects on the activity of Kir6.2ΔC26 channels (a truncated isoform of Kir6.2) or its mutant channels (i.e. Kir6.2ΔC26C166A) expressed in HEK 293 cells. ZD0947 also elicited activity in SUR2B/Kir6.1 channels expressed in HEK 293 cells, in a concentration-dependent manner. Therefore, ZD0947 is a relatively effective activator of smooth muscle-type KATP channels (SUR2B/Kir6.1 and SUR2B/Kir6.2) but is a partial antagonist of pancreatic-type KATP channels (i.e. SUR1/Kir6.2) and cardiac-type KATP channels (i.e. SUR2A/Kir6.2). These results suggest that a pharmacological agent can possess either agonist or antagonist actions on the activity of KATP channels, depending on the subtype of SUR.x.
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Affiliation(s)
- Keisuke Mori
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yoshio Yamashita
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Noriyoshi Teramoto
- Department of Pharmacology, Faculty of Medicine, Saga University, Saga 849-8501, Japan; Laboratory of Biomedical Engineering, Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8575, Japan.
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