1
|
Nakano M, Koga M, Hashimoto T, Matsushita N, Masukawa D, Mizuno Y, Uchimura H, Niikura R, Miyazaki T, Nakamura F, Zou S, Shimizu T, Saito M, Tamura K, Goto T, Goshima Y. Right ventricular overloading is attenuated in monocrotaline-induced pulmonary hypertension model rats with a disrupted Gpr143 gene, the gene that encodes the 3,4-l-dihydroxyphenyalanine (l-DOPA) receptor. J Pharmacol Sci 2022; 148:214-220. [PMID: 35063136 DOI: 10.1016/j.jphs.2021.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/18/2021] [Accepted: 11/29/2021] [Indexed: 12/17/2022] Open
Abstract
Pulmonary hypertension (PH) is a severe and progressive disease that causes elevated right ventricular systolic pressure, right ventricular hypertrophy and ultimately right heart failure. However, the underlying pathophysiologic mechanisms are poorly understood. We previously showed that 3,4-l-dihydroxylphenyalanine (DOPA) sensitizes vasomotor response to sympathetic tone via coupling between the adrenergic receptor alpha1 (ADRA1) and a G protein-coupled receptor 143 (GPR143), a DOPA receptor. We investigated whether DOPA similarly enhances ADRA1-mediated contraction in pulmonary arteries isolated from rats, and whether GPR143 is involved in the PH pathogenesis. Pretreating the isolated pulmonary arteries with DOPA 1 μM enhanced vasoconstriction in response to phenylephrine, an ADRA1 agonist, but not to U-46619, a thromboxane A2 agonist or endothelin-1. We generated Gpr143 gene-deficient (Gpr143-/y) rats, and confirmed that DOPA did not augment phenylephrine-induced contractile response in Gpr143-/y rat pulmonary arteries. We utilized a rat model of monocrotaline (MCT)-induced PH. In the MCT model, the right ventricular systolic pressure was attenuated in the Gpr143-/y rats than in WT rats. Phenylephrine-induced cell migration and proliferation were also suppressed in Gpr143-/y pulmonary artery smooth muscle cells than in WT cells. Our result suggests that GPR143 is involved in the PH pathogenesis in the rat models of PH.
Collapse
MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology
- Animals
- Disease Models, Animal
- Heart Failure/etiology
- Hypertension, Pulmonary/etiology
- Hypertension, Pulmonary/genetics
- Hypertrophy, Right Ventricular/etiology
- In Vitro Techniques
- Male
- Monocrotaline/adverse effects
- Pulmonary Artery/physiology
- Rats, Sprague-Dawley
- Receptors, Adrenergic, alpha-1/physiology
- Receptors, G-Protein-Coupled/physiology
- Receptors, Neurotransmitter/genetics
- Systole
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
- Ventricular Dysfunction, Right/etiology
- Ventricular Function, Right/genetics
- Rats
Collapse
Affiliation(s)
- Masayuki Nakano
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Motokazu Koga
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Anesthesiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Anesthesiology, Kanagawa Cancer Center, Yokohama, 241-8515, Japan
| | - Tatsuo Hashimoto
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Internal Medicine, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka 238-8680, Japan, Yokosuka, 238-8570, Japan
| | - Natsuki Matsushita
- Division of Laboratory Animal Research, Aichi Medical University, Nagakute, 480-1195, Aichi, Japan
| | - Daiki Masukawa
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Yusuke Mizuno
- Department of Anesthesiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Hiraku Uchimura
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Psychiatry, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Ryo Niikura
- Department of Anesthesiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Tomoyuki Miyazaki
- Department of Anesthesiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Physiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Fumio Nakamura
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan; Department of Biochemistry, School of Medicine, Tokyo Women's Medical University, Tokyo, 162- 8666, Japan
| | - Suo Zou
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
| | - Takahiro Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Takahisa Goto
- Department of Anesthesiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan
| | - Yoshio Goshima
- Department of Molecular Pharmacology and Neurobiology, Graduate School of Medicine, Yokohama City University, Yokohama, 236-0004, Japan.
| |
Collapse
|
2
|
Chen YL, Ren Y, Rosa RH, Kuo L, Hein TW. Contributions of Sodium-Hydrogen Exchanger 1 and Mitogen-Activated Protein Kinases to Enhanced Retinal Venular Constriction to Endothelin-1 in Diabetes. Diabetes 2021; 70:2353-2363. [PMID: 34353852 PMCID: PMC8576499 DOI: 10.2337/db20-0889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 07/28/2021] [Indexed: 11/13/2022]
Abstract
Diabetes elevates endothelin-1 (ET-1) in the vitreous and enhances constriction of retinal venules to this peptide. However, mechanisms contributing to ET-1-induced constriction of retinal venules are incompletely understood. We examined roles of sodium-hydrogen exchanger 1 (NHE1), protein kinase C (PKC), mitogen-activated protein kinases (MAPKs), and extracellular calcium (Ca2+) in retinal venular constriction to ET-1 and the impact of diabetes on these signaling molecules. Retinal venules were isolated from control pigs and pigs with streptozocin-induced diabetes for in vitro studies. ET-1-induced vasoconstriction was abolished in the absence of extracellular Ca2+ and sensitive to c-Jun N-terminal kinase (JNK) inhibitor SP600125 but unaffected by extracellular signal-regulated kinase (ERK) inhibitor PD98059, p38 kinase inhibitor SB203580, or broad-spectrum PKC inhibitor Gö 6983. Diabetes (after 2 weeks) enhanced venular constriction to ET-1, which was insensitive to PD98059 and Gö 6983 but was prevented by NHE1 inhibitor cariporide, SB203580, and SP600125. In conclusion, extracellular Ca2+ entry and activation of JNK, independent of ERK and PKC, mediate constriction of retinal venules to ET-1. Diabetes activates p38 MAPK and NHE1, which cause enhanced venular constriction to ET-1. Treatments targeting these vascular molecules may lessen retinal complications in early diabetes.
Collapse
Affiliation(s)
- Yen-Lin Chen
- Department of Medical Physiology, College of Medicine, Texas A&M University Health Science Center, Bryan, TX
| | - Yi Ren
- Department of Medical Physiology, College of Medicine, Texas A&M University Health Science Center, Bryan, TX
| | - Robert H Rosa
- Department of Medical Physiology, College of Medicine, Texas A&M University Health Science Center, Bryan, TX
- Department of Ophthalmology, Baylor Scott & White Eye Institute, Temple, TX
| | - Lih Kuo
- Department of Medical Physiology, College of Medicine, Texas A&M University Health Science Center, Bryan, TX
| | - Travis W Hein
- Department of Medical Physiology, College of Medicine, Texas A&M University Health Science Center, Bryan, TX
| |
Collapse
|
3
|
Abstract
A high amount of salt in the diet increases blood pressure (BP) and leads to salt-sensitive hypertension in individuals with impaired renal sodium excretion. Small guanosine triphosphatase (GTP)ase Rho and Rac, activated by salt intake, play important roles in the pathogenesis of salt-sensitive hypertension as key switches of intracellular signaling. Focusing on Rho, high salt intake in the central nervous system increases sodium concentrations of cerebrospinal fluid in salt-sensitive subjects via Rho/Rho kinase and renin-angiotensin system activation and causes increased brain salt sensitivity and sympathetic nerve outflow in BP control centers. In vascular smooth muscle cells, Rho-guanine nucleotide exchange factors and Rho determine sensitivity to vasoconstrictors such as angiotensin II (Ang II), and facilitate vasoconstriction via G-protein and Wnt pathways, leading to increased vascular resistance, including in the renal arteries, in salt-sensitive subjects with high salt intake. In the vascular endothelium, Rho/Rho kinase inhibits nitric oxide (NO) production and function, and high salt amounts further augment Rho activity via asymmetric dimethylarginine, an endogenous inhibitor of NO synthetase, causing aberrant relaxation and increased vascular tone. Rho-associated mechanisms are deeply involved in the development of salt-sensitive hypertension, and their further elucidation can help in developing effective protection and new therapies.
Collapse
|
4
|
Zingales V, Torrisi SA, Leggio GM, Bucolo C, Drago F, Salomone S. Pharmacological and Genetic Evidence of Dopamine Receptor 3-Mediated Vasoconstriction in Isolated Mouse Aorta. Biomolecules 2021; 11:418. [PMID: 33799860 PMCID: PMC8001456 DOI: 10.3390/biom11030418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 11/16/2022] Open
Abstract
Dopamine receptors (DRs) are generally considered as mediators of vasomotor functions. However, when used in pharmacological studies, dopamine and/or DR agonists may not discriminate among different DR subtypes and may even stimulate alpha1 and beta-adrenoceptors. Here, we tested the hypothesis that D2R and/or D3R may specifically induce vasoconstriction in isolated mouse aorta. Aorta, isolated from wild-type (WT) and D3R-/- mice, was mounted in a wire myograph and challenged with cumulative concentrations of phenylephrine (PE), acetylcholine (ACh), and the D3R agonist 7-hydrxy-N,N-dipropyl-2-aminotetralin (7-OH-DPAT), with or without the D2R antagonist L741,626 and the D3R antagonist SB-277011-A. The vasoconstriction to PE and the vasodilatation to ACh were not different in WT and D3R-/-; in contrast, the contractile responses to 7-OH-DPAT were significantly weaker in D3R-/-, though not abolished. L741,626 did not change the contractile response induced by 7-OH-DPAT in WT or in D3R-/-, whereas SB-277011-A significantly reduced it in WT but did not in D3R-/-. D3R mRNA (assessed by qPCR) was about 5-fold more abundant than D2R mRNA in aorta from WT and undetectable in aorta from D3R-/-. Following transduction with lentivirus (72-h incubation) delivering synthetic microRNAs to specifically inactivate D2R (LV-miR-D2) or D3R (LV-miR-D3), the contractile response to 7-OH-DPAT was unaffected by LV-miR-D2, while it was significantly reduced by LV-miR-D3. These data indicate that, at least in mouse aorta, D3R stimulation induces vasoconstriction, while D2R stimulation does not. This is consistent with the higher expression level of D3R. The residual vasoconstriction elicited by high concentration D3R agonist in D3R-/- and/or in the presence of D3R antagonist is likely to be unrelated to DRs.
Collapse
MESH Headings
- Animals
- Aorta/drug effects
- Aorta/physiology
- Indoles/pharmacology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Nitriles/pharmacology
- Piperidines/pharmacology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Dopamine D2/genetics
- Receptors, Dopamine D2/metabolism
- Receptors, Dopamine D3/agonists
- Receptors, Dopamine D3/antagonists & inhibitors
- Receptors, Dopamine D3/genetics
- Receptors, Dopamine D3/metabolism
- Tetrahydroisoquinolines/pharmacology
- Tetrahydronaphthalenes/pharmacology
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
- Mice
Collapse
Affiliation(s)
| | | | | | | | | | - Salvatore Salomone
- Department of Biomedical and Biotechnological Sciences, University of Catania, via S. Sofia 97, 95123 Catania, Italy; (V.Z.); (S.A.T.); (G.M.L.); (C.B.); (F.D.)
| |
Collapse
|
5
|
Cros-Brunsó L, Camacho-Rodríguez L, Martínez-González Á, Llévenes P, Salaices M, García-Redondo AB, Blanco-Rivero J. A Blunted Sympathetic Function and an Enhanced Nitrergic Activity Contribute to Reduce Mesenteric Resistance in Hyperthyroidism. Int J Mol Sci 2021; 22:ijms22020570. [PMID: 33430047 PMCID: PMC7826714 DOI: 10.3390/ijms22020570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 12/17/2022] Open
Abstract
We aimed to determine whether an experimental model of hyperthyroidism could alter the function of sympathetic and nitrergic components of mesenteric innervation. For this purpose, male Wistar rats were divided into (1) control rats (CT) and (2) rats infused with L-Thyroxine (HT). Body weight gain and adipose tissue accumulation were lower in HT rats, while systolic blood pressure and citrate synthase activity in the soleus muscle were increased by HT. In segments from the superior mesenteric artery, the application of an electrical field stimulation (EFS) induced a vasoconstrictor response, which was lower in arteries from HT animals. The alpha-adrenoceptor antagonist phentolamine diminished EFS-induced vasoconstriction to a lower extent in HT arteries, while the purinergic receptor antagonist suramin reduced contractile response to EFS only in segments from CT. In line with this, noradrenaline release, tyrosine hydroxylase expression and activation and dopamine β hydroxylase expression were diminished in HT. The unspecific nitric oxide synthase (NOS) inhibitor L-NAME increased EFS-induced vasoconstriction more markedly in segments from HT rats. NO release was enhanced in HT, probably due to an enhancement in neuronal NOS activity, in which a hyperactivation of both PKC and PI3K-AKT signaling pathways might play a relevant role. In conclusion, perivascular mesenteric innervation might contribute to reduce the vascular resistance observed in hyperthyroidism.
Collapse
Affiliation(s)
- Laia Cros-Brunsó
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
| | - Laura Camacho-Rodríguez
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
| | - Ángel Martínez-González
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
| | - Pablo Llévenes
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
| | - Mercedes Salaices
- Department of Pharmacology and Therapeutics, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain;
- Research Institute University Hospital la Paz (IdIPaz), Calle de Pedro Rico 6, 28029 Madrid, Spain
- Center for Biomedical Research Network in Cardiovascular Diseases (CIBERCV), Calle de Melchor Fernández Almagro 3, 28029 Madrid, Spain
| | - Ana Belen García-Redondo
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
- Research Institute University Hospital la Paz (IdIPaz), Calle de Pedro Rico 6, 28029 Madrid, Spain
- Center for Biomedical Research Network in Cardiovascular Diseases (CIBERCV), Calle de Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Correspondence: (A.B.G.-R.); (J.B.-R.); Tel.: +34-91-497-5446 (A.B.G.-R. & J.B.-R.)
| | - Javier Blanco-Rivero
- Department of Physiology, School of Medicine, Universidad Autónoma de Madrid, Calle de Arzobispo Morcillo 4, 28029 Madrid, Spain; (L.C.-B.); (L.C.-R.); (Á.M.-G.); (P.L.)
- Research Institute University Hospital la Paz (IdIPaz), Calle de Pedro Rico 6, 28029 Madrid, Spain
- Center for Biomedical Research Network in Cardiovascular Diseases (CIBERCV), Calle de Melchor Fernández Almagro 3, 28029 Madrid, Spain
- Correspondence: (A.B.G.-R.); (J.B.-R.); Tel.: +34-91-497-5446 (A.B.G.-R. & J.B.-R.)
| |
Collapse
|
6
|
Babicheva A, Ayon RJ, Zhao T, Ek Vitorin JF, Pohl NM, Yamamura A, Yamamura H, Quinton BA, Ba M, Wu L, Ravellette KS, Rahimi S, Balistrieri F, Harrington A, Vanderpool RR, Thistlethwaite PA, Makino A, Yuan JXJ. MicroRNA-mediated downregulation of K + channels in pulmonary arterial hypertension. Am J Physiol Lung Cell Mol Physiol 2020; 318:L10-L26. [PMID: 31553627 PMCID: PMC6985878 DOI: 10.1152/ajplung.00010.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 08/19/2019] [Accepted: 09/06/2019] [Indexed: 12/22/2022] Open
Abstract
Downregulated expression of K+ channels and decreased K+ currents in pulmonary artery smooth muscle cells (PASMC) have been implicated in the development of sustained pulmonary vasoconstriction and vascular remodeling in patients with idiopathic pulmonary arterial hypertension (IPAH). However, it is unclear exactly how K+ channels are downregulated in IPAH-PASMC. MicroRNAs (miRNAs) are small non-coding RNAs that are capable of posttranscriptionally regulating gene expression by binding to the 3'-untranslated regions of their targeted mRNAs. Here, we report that specific miRNAs are responsible for the decreased K+ channel expression and function in IPAH-PASMC. We identified 3 miRNAs (miR-29b, miR-138, and miR-222) that were highly expressed in IPAH-PASMC in comparison to normal PASMC (>2.5-fold difference). Selectively upregulated miRNAs are correlated with the decreased expression and attenuated activity of K+ channels. Overexpression of miR-29b, miR-138, or miR-222 in normal PASMC significantly decreased whole cell K+ currents and downregulated voltage-gated K+ channel 1.5 (KV1.5/KCNA5) in normal PASMC. Inhibition of miR-29b in IPAH-PASMC completely recovered K+ channel function and KV1.5 expression, while miR-138 and miR-222 had a partial or no effect. Luciferase assays further revealed that KV1.5 is a direct target of miR-29b. Additionally, overexpression of miR-29b in normal PASMC decreased large-conductance Ca2+-activated K+ (BKCa) channel currents and downregulated BKCa channel β1 subunit (BKCaβ1 or KCNMB1) expression, while inhibition of miR-29b in IPAH-PASMC increased BKCa channel activity and BKCaβ1 levels. These data indicate upregulated miR-29b contributes at least partially to the attenuated function and expression of KV and BKCa channels in PASMC from patients with IPAH.
Collapse
Affiliation(s)
- Aleksandra Babicheva
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Ramon J Ayon
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Tengteng Zhao
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Jose F Ek Vitorin
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Nicole M Pohl
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Aya Yamamura
- Kinjo Gakuin University School of Pharmacy, Nagoya, Japan
| | - Hisao Yamamura
- Nagoya City University Graduate School of Pharmaceutical Sciences, Nagoya, Japan
| | - Brooke A Quinton
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Manqing Ba
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Linda Wu
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Keeley S Ravellette
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Shamin Rahimi
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
| | - Francesca Balistrieri
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
| | - Angela Harrington
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
| | - Rebecca R Vanderpool
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | | | - Ayako Makino
- Division of Endocrinology and Metabolism, Department of Medicine, University of California, San Diego, La Jolla, California
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
| | - Jason X-J Yuan
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
- Departments of Medicine and Physiology, The University of Arizona, Tucson, Arizona
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| |
Collapse
|
7
|
Chen L, Zhang B, Yang L, Bai YG, Song JB, Ge YL, Ma HZ, Cheng JH, Ma J, Xie MJ. BMAL1 Disrupted Intrinsic Diurnal Oscillation in Rat Cerebrovascular Contractility of Simulated Microgravity Rats by Altering Circadian Regulation of miR-103/Ca V1.2 Signal Pathway. Int J Mol Sci 2019; 20:ijms20163947. [PMID: 31416128 PMCID: PMC6720455 DOI: 10.3390/ijms20163947] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/17/2019] [Accepted: 08/06/2019] [Indexed: 12/11/2022] Open
Abstract
The functional and structural adaptations in cerebral arteries could be one of the fundamental causes in the occurrence of orthostatic intolerance after space flight. In addition, emerging studies have found that many cardiovascular functions exhibit circadian rhythm. Several lines of evidence suggest that space flight might increase an astronaut’s cardiovascular risks by disrupting circadian rhythm. However, it remains unknown whether microgravity disrupts the diurnal variation in vascular contractility and whether microgravity impacts on circadian clock system. Sprague-Dawley rats were subjected to 28-day hindlimb-unweighting to simulate the effects of microgravity on vasculature. Cerebrovascular contractility was estimated by investigating vasoconstrictor responsiveness and myogenic tone. The circadian regulation of CaV1.2 channel was determined by recording whole-cell currents, evaluating protein and mRNA expressions. Then the candidate miRNA in relation with Ca2+ signal was screened. Lastly, the underlying pathway involved in circadian regulation of cerebrovascular contractility was determined. The major findings of this study are: (1) The clock gene BMAL1 could induce the expression of miR-103, and in turn modulate the circadian regulation of CaV1.2 channel in rat cerebral arteries at post-transcriptional level; and (2) simulated microgravity disrupted intrinsic diurnal oscillation in rat cerebrovascular contractility by altering circadian regulation of BMAL1/miR-103/CaV1.2 signal pathway.
Collapse
Affiliation(s)
- Li Chen
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Bin Zhang
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Lu Yang
- Department of Physiology, Fourth Military Medical University, Xi'an 710032, China
| | - Yun-Gang Bai
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Ji-Bo Song
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Yi-Ling Ge
- First Cadet Brigade, Fourth Military Medical University, Xi'an 710032, China
| | - Hong-Zhe Ma
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Jiu-Hua Cheng
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Jin Ma
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China
| | - Man-Jiang Xie
- Department of Aerospace Physiology, Key Laboratory of Aerospace Medicine of Ministry of Education, Fourth Military Medical University, Xi'an 710032, China.
| |
Collapse
|
8
|
Gachkar S, Nock S, Geissler C, Oelkrug R, Johann K, Resch J, Rahman A, Arner A, Kirchner H, Mittag J. Aortic effects of thyroid hormone in male mice. J Mol Endocrinol 2019; 62:91-99. [PMID: 30608905 DOI: 10.1530/jme-18-0217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/03/2019] [Indexed: 01/12/2023]
Abstract
It is well established that thyroid hormones are required for cardiovascular functions; however, the molecular mechanisms remain incompletely understood, especially the individual contributions of genomic and non-genomic signalling pathways. In this study, we dissected how thyroid hormones modulate aortic contractility. To test the immediate effects of thyroid hormones on vasocontractility, we used a wire myograph to record the contractile response of dissected mouse aortas to the adrenergic agonist phenylephrine in the presence of different doses of T3 (3,3',5-triiodothyronine). Interestingly, we observed reduced vasoconstriction under low and high T3 concentrations, indicating an inversed U-shaped curve with maximal constrictive capacity at euthyroid conditions. We then tested for possible genomic actions of thyroid hormones on vasocontractility by treating mice for 4 days with 1 mg/L thyroxine in drinking water. The study revealed that in contrast to the non-genomic actions the aortas of these animals were hyperresponsive to the contractile stimulus, an effect not observed in endogenously hyperthyroid TRβ knockout mice. To identify targets of genomic thyroid hormone action, we analysed aortic gene expression by microarray, revealing several altered genes including the well-known thyroid hormone target gene hairless. Taken together, the findings demonstrate that thyroid hormones regulate aortic tone through genomic and non-genomic actions, although genomic actions seem to prevail in vivo. Moreover, we identified several novel thyroid hormone target genes that could provide a better understanding of the molecular changes occurring in the hyperthyroid aorta.
Collapse
Affiliation(s)
- Sogol Gachkar
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Sebastian Nock
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Cathleen Geissler
- Epigenetics & Metabolism, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Rebecca Oelkrug
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Kornelia Johann
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Julia Resch
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Awahan Rahman
- Department for Comparative Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anders Arner
- Department of Cardiothoracic Surgery, Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Henriette Kirchner
- Epigenetics & Metabolism, Medical Department I, University of Lübeck, Lübeck, Germany
| | - Jens Mittag
- Molecular Endocrinology, Medical Department I, University of Lübeck, Lübeck, Germany
| |
Collapse
|
9
|
Best KA, Bone DB, Vilas G, Gros R, Hammond JR. Changes in aortic reactivity associated with the loss of equilibrative nucleoside transporter 1 (ENT1) in mice. PLoS One 2018; 13:e0207198. [PMID: 30408123 PMCID: PMC6224178 DOI: 10.1371/journal.pone.0207198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/26/2018] [Indexed: 01/23/2023] Open
Abstract
Slc29a1 encodes for equilibrative nucleoside transporter subtype 1 (ENT1), the primary mechanism of adenosine transfer across cell membranes. Previous studies showed that tissues isolated from Slc29a1-null mice are relatively resistant to injury caused by vascular ischemia-reperfusion. To determine if there are similar changes in the microvasculature, and investigate underlying mechanism, we examined aortas isolated from wildtype and Slc29a1-null mice. Aorta macrostructure and gene expression were examined histologically and by qPCR, respectively. Wire myography was used to assess the contractile properties of isolated thoracic aortic rings and their response to adenosine under both normoxic and hypoxic conditions. In vivo haemodynamic parameters were assessed using the tail-cuff method. Slc29a1-null mice had significantly (P<0.05) increased plasma adenosine (2.75-fold) and lower blood pressure (~15% ↓) than wild-type mice. Aortas from Slc29a1-null mice were stiffer with a smaller circumference (11% ↓), and had an enhanced contractile response to KCl and receptor-mediated stimuli. Blockade of ENT1 with nitrobenzylthioinosine significantly enhanced (by ~3.5-fold) the response of aorta from wild-type mice to phenylephrine, but had minimal effect on aortas from Slc29a1-null mice. Adenosine enhanced phenylephrine-mediated constriction in the wild-type tissue under both normoxic (11.7-fold) and hypoxic (3.6-fold) conditions, but had no effect on the Slc29a1-null aortic aorta. In conclusion, aortas from Slc29a1-null mice respond to hypoxic insult in a manner comparable to wild-type tissues that have been pharmacologically preconditioned with adenosine. These data also support a role for ENT1 in the regulation of the protective effects of adenosine on contractile function in elastic conduit arteries such as thoracic aorta.
Collapse
Affiliation(s)
- K. Arielle Best
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Derek B. Bone
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Gonzalo Vilas
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Robert Gros
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
- Molecular Medicine Research Group, Robarts Research Institute, London, Ontario, Canada
| | - James R. Hammond
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| |
Collapse
|
10
|
Vangrieken P, Al-Nasiry S, Janssen GMJ, Weseler AR, Spaanderman ME, Bast A, Schiffers PMH. The direct and sustained consequences of severe placental hypoxia on vascular contractility. PLoS One 2018; 13:e0202648. [PMID: 30142162 PMCID: PMC6108468 DOI: 10.1371/journal.pone.0202648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 08/07/2018] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION Preeclampsia is a major health problem in human pregnancy, severely complicating 5-8% of all pregnancies. The emerging molecular mechanism is that conditions like hypoxic stress trigger the release of placental messengers into the maternal circulation, which causes preeclampsia. Our objective was to develop an in vitro model, which can be used to further elucidate the molecular mechanisms of preeclampsia and which might be used to find a remedy. METHODS Human non-complicated term placentas were collected. Placental explants were subjected to severe hypoxia and the conditioned media were added to chorionic arteries that were mounted into a myograph. Contractile responses of the conditioned media were determined, as well as effects on thromboxane-A2 (U46619) induced contractility. To identify the vasoactive compounds present in the conditioned media, specific receptor antagonists were evaluated. RESULTS Factors released by placental explants generated under severe hypoxia induced an increased vasoconstriction and vascular contractility to thromboxane-A2. It was found that agonists for the angiotensin-I and endothelin-1 receptor released by placental tissue under severe hypoxia provoke vasoconstriction. The dietary antioxidant quercetin could partially prevent the acute and sustained vascular effects in a concentration-dependent manner. DISCUSSION Both the acute vasoconstriction, as well as the increased contractility to U46619 are in line with the clinical vascular complications observed in preeclampsia. Data obtained with quercetin supports that our model opens avenues for e.g. nutritional interventions aimed at treating or preventing preeclampsia.
Collapse
Affiliation(s)
- Philippe Vangrieken
- Department of Pharmacology and Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
- * E-mail:
| | - Salwan Al-Nasiry
- Department of Obstetrics and Gynecology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Ger M. J. Janssen
- Department of Pharmacology and Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Antje R. Weseler
- Department of Pharmacology and Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Marc E. Spaanderman
- Department of Obstetrics and Gynecology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Aalt Bast
- Department of Pharmacology and Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Paul M. H. Schiffers
- Department of Pharmacology and Toxicology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| |
Collapse
|
11
|
Wilson JL, Warburton R, Taylor L, Toksoz D, Hill N, Polgar P. Unraveling endothelin-1 induced hypercontractility of human pulmonary artery smooth muscle cells from patients with pulmonary arterial hypertension. PLoS One 2018; 13:e0195780. [PMID: 29649319 PMCID: PMC5897024 DOI: 10.1371/journal.pone.0195780] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 03/29/2018] [Indexed: 01/05/2023] Open
Abstract
Contraction of human pulmonary artery smooth muscle cells (HPASMC) isolated from pulmonary arterial hypertensive (PAH) and normal (non-PAH) subject lungs was determined and measured with real-time electrical impedance. Treatment of HPASMC with vasoactive peptides, endothelin-1 (ET-1) and bradykinin (BK) but not angiotensin II, induced a temporal decrease in the electrical impedance profile mirroring constrictive morphological change of the cells which typically was more robust in PAH as opposed to non-PAH cells. Inhibition with LIMKi3 and a cofilin targeted motif mimicking cell permeable peptide (MMCPP) had no effect on ET-1 induced HPASMC contraction indicating a negligible role for these actin regulatory proteins. On the other hand, a MMCPP blocking the activity of caldesmon reduced ET-1 promoted contraction pointing to a regulatory role of this protein and its activation pathway in HPASMC contraction. Inhibition of this MEK/ERK/p90RSK pathway, which is an upstream regulator of caldesmon phosphorylation, reduced ET-1 induced cell contraction. While the regulation of ET-1 induced cell contraction was found to be similar in PAH and non-PAH cells, a key difference was the response to pharmacological inhibitors and to siRNA knockdown of Rho kinases (ROCK1/ROCK2). The PAH cells required much higher concentrations of inhibitors to abrogate ET-1 induced contractions and their contraction was not affected by siRNA against either ROCK1 or ROCK2. Lastly, blocking of L-type and T-type Ca2+ channels had no effect on ET-1 or BK induced contraction. However, inhibiting the activity of the sarcoplasmic reticulum Ca2+ ATPase blunted ET-1 and BK induced HPASMC contraction in both PAH and non-PAH derived HPASMC. In summary, our findings here together with previous communications illustrate similarities and differences in the regulation PAH and non-PAH smooth muscle cell contraction relating to calcium translocation, RhoA/ROCK signaling and the activity of caldesmon. These findings may provide useful tools in achieving the regulation of the vascular hypercontractility taking place in PAH.
Collapse
Affiliation(s)
- Jamie L. Wilson
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
- * E-mail:
| | - Rod Warburton
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Linda Taylor
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Deniz Toksoz
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Nicholas Hill
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Peter Polgar
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, United States of America
| |
Collapse
|
12
|
Abstract
Farrerol, a typical natural flavanone and major active component in Rhododendron dauricum var. ciliatum, has been shown to possess vasoactive ability in vitro. The aim of this study was to investigate its effect on aorta gene expression in spontaneously hypertensive rats. Twelve-week-old male normotensive Wistar Kyoto rats and spontaneously hypertensive rats were treated with orally administered farrerol (50 mg/kg body weight) for 8 wk before they were sacrificed. We found that aorta samples showed 444 upregulated genes in control spontaneously hypertensive rats compared with the control Wistar Kyoto rats. Administration of farrerol in spontaneously hypertensive rats increased the expression of 2329 genes in the aorta compared with the control spontaneously hypertensive rats. Gene expression profiles performed on the aorta revealed that farrerol induced changes in vascular smooth muscle contraction, mitogen-activated protein kinase signaling pathway, regulation of actin cytoskeleton, vascular endothelial growth factor signaling pathway, calcium signaling pathway, and renin angiotensin system. Furthermore, 10 genes involved in the pathway of vascular smooth muscle contraction were verified using real-time polymerase chain reaction technique, and several novel potential target genes for the farrerol treatment of hypertension were identified. The findings of this study lend support to the potential use of farrerol as a novel therapeutic and antihypertensive candidate drug to prevent the development of hypertension.
Collapse
Affiliation(s)
- Xiaojiang Qin
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaomin Hou
- Department of Pharmacology, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Kun Zhang
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Qingshan Li
- School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, China
- Shanxi University of Chinese medicine, Taiyuan, Shanxi, China
| |
Collapse
|
13
|
Muñoz-Sánchez MÁ, Rodríguez-Rodríguez A, Egea-Guerrero JJ, Gordillo-Escobar E, Vilches-Arenas Á, Carrillo-Vico A, Guerrero JM, Murillo-Cabezas F. Urotensinergic system genes in experimental subarachnoid hemorrhage. Med Intensiva 2017; 41:468-474. [PMID: 28081921 DOI: 10.1016/j.medin.2016.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/14/2016] [Accepted: 10/23/2016] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Cerebral vasospasm, one of the main complications of subarachnoid hemorrhage (SAH), is characterized by arterial constriction and mainly occurs from day 4 until the second week after the event. Urotensin-II (U-II) has been described as the most potent vasoconstrictor peptide in mammals. An analysis is made of the serum U-II concentrations and mRNA expression levels of U-II, urotensin related peptide (URP) and urotensin receptor (UT) genes in an experimental murine model of SAH. DESIGN An experimental study was carried out. SETTING Experimental operating room of the Biomedicine Institute of Seville (IBiS), Virgen del Rocío University Hospital (Seville, Spain). PARTICIPANTS 96 Wistar rats: 74 SAH and 22 sham intervention animals. INTERVENTIONS Day 1: blood sampling, followed by the percutaneous injection of 100μl saline (sham) or blood (SAH) into the subarachnoid space. Day 5: blood sampling, followed by sacrifice of the animals. MAIN VARIABLES OF INTEREST Weight, early mortality, serum U-II levels, mRNA values for U-II, URP and UT. RESULTS Serum U-II levels increased in the SAH group from day 1 (0.62pg/mL [IQR 0.36-1.08]) to day 5 (0.74pg/mL [IQR 0.39-1.43]) (p<0.05), though not in the sham group (0.56pg/mL [IQR 0.06-0.83] day 1; 0.37pg/mL [IQR 0.23-0.62] day 5; p=0.959). Between-group differences were found on day 5 (p<0.05). The ROC analysis showed that the day 5 serum U-II levels (AUC=0.691), URP mRNA (AUC=0.706) and UT mRNA (AUC=0.713) could discriminate between sham and SAH rats. The normal serum U-II concentration range in rats was 0.56pg/mL (IQR 0.06-0.83). CONCLUSION The urotensinergic system is upregulated on day 5 in an experimental model of SAH.
Collapse
MESH Headings
- Animals
- Biomarkers
- Disease Models, Animal
- Gene Expression Regulation
- Peptide Hormones/biosynthesis
- Peptide Hormones/blood
- Peptide Hormones/genetics
- RNA, Messenger/biosynthesis
- RNA, Messenger/blood
- RNA, Messenger/genetics
- ROC Curve
- Rats
- Rats, Wistar
- Real-Time Polymerase Chain Reaction
- Receptors, G-Protein-Coupled/biosynthesis
- Receptors, G-Protein-Coupled/blood
- Receptors, G-Protein-Coupled/genetics
- Sensitivity and Specificity
- Subarachnoid Hemorrhage/complications
- Subarachnoid Hemorrhage/genetics
- Urotensins/biosynthesis
- Urotensins/blood
- Urotensins/genetics
- Vasoconstriction/genetics
- Vasospasm, Intracranial/etiology
- Vasospasm, Intracranial/genetics
Collapse
Affiliation(s)
- M Á Muñoz-Sánchez
- Servicio de Urgencias, Hospital Universitario Virgen del Rocío, IBIS/CSIC/Universidad de Sevilla, Spain
| | - A Rodríguez-Rodríguez
- Cuidados Críticos, Hospital Universitario Virgen del Rocío, IBIS/CSIC/Universidad de Sevilla, Spain.
| | - J J Egea-Guerrero
- Cuidados Críticos, Hospital Universitario Virgen del Rocío, IBIS/CSIC/Universidad de Sevilla, Spain
| | - E Gordillo-Escobar
- Cuidados Críticos, Hospital Universitario Virgen del Rocío, IBIS/CSIC/Universidad de Sevilla, Spain
| | - Á Vilches-Arenas
- Servicio de Medicina Preventiva y Salud Pública, Hospital Virgen Macarena, Universidad de Sevilla, Spain
| | - A Carrillo-Vico
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Spain; Departamento de Bioquimica Médica, Biología molecular e Inmunología, Facultad de Medicina, Universidad de Sevilla, Spain
| | - J M Guerrero
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Spain; Departamento de Bioquimica Médica, Biología molecular e Inmunología, Facultad de Medicina, Universidad de Sevilla, Spain
| | - F Murillo-Cabezas
- Cuidados Críticos, Hospital Universitario Virgen del Rocío, IBIS/CSIC/Universidad de Sevilla, Spain
| |
Collapse
|
14
|
Migone FF, Cowan RG, Williams RM, Gorse KJ, Zipfel WR, Quirk SM. In vivo imaging reveals an essential role of vasoconstriction in rupture of the ovarian follicle at ovulation. Proc Natl Acad Sci U S A 2016; 113:2294-9. [PMID: 26842836 PMCID: PMC4776534 DOI: 10.1073/pnas.1512304113] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Rupture of the ovarian follicle releases the oocyte at ovulation, a timed event that is critical for fertilization. It is not understood how the protease activity required for rupture is directed with precise timing and localization to the outer surface, or apex, of the follicle. We hypothesized that vasoconstriction at the apex is essential for rupture. The diameter and blood flow of individual vessels and the thickness of the apical follicle wall were examined over time to expected ovulation using intravital multiphoton microscopy. Vasoconstriction of apical vessels occurred within hours preceding follicle rupture in wild-type mice, but vasoconstriction and rupture were absent in Amhr2(cre/+)SmoM2 mice in which follicle vessels lack the normal association with vascular smooth muscle. Vasoconstriction is not simply a response to reduced thickness of the follicle wall; vasoconstriction persisted in wild-type mice when thinning of the follicle wall was prevented by infusion of protease inhibitors into the ovarian bursa. Ovulation was inhibited by preventing the periovulatory rise in the expression of the vasoconstrictor endothelin 2 by follicle cells of wild-type mice. In these mice, infusion of vasoconstrictors (either endothelin 2 or angiotensin 2) into the bursa restored the vasoconstriction of apical vessels and ovulation. Additionally, infusion of endothelin receptor antagonists into the bursa of wild-type mice prevented vasoconstriction and follicle rupture. Processing tissue to allow imaging at increased depth through the follicle and transabdominal ultrasonography in vivo showed that decreased blood flow is restricted to the apex. These results demonstrate that vasoconstriction at the apex of the follicle is essential for ovulation.
Collapse
MESH Headings
- Animals
- Endothelin-2/deficiency
- Endothelin-2/genetics
- Endothelin-2/physiology
- Female
- Intravital Microscopy
- Mice
- Mice, 129 Strain
- Mice, Transgenic
- Microscopy, Fluorescence, Multiphoton
- Ovarian Follicle/blood supply
- Ovarian Follicle/diagnostic imaging
- Ovarian Follicle/physiology
- Ovulation/genetics
- Ovulation/physiology
- Receptors, G-Protein-Coupled/deficiency
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/physiology
- Receptors, Peptide/deficiency
- Receptors, Peptide/genetics
- Receptors, Peptide/physiology
- Receptors, Transforming Growth Factor beta/deficiency
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/physiology
- Smoothened Receptor
- Ultrasonography
- Vasoconstriction/genetics
- Vasoconstriction/physiology
Collapse
Affiliation(s)
- Fernando F Migone
- Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - Robert G Cowan
- Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - Rebecca M Williams
- Department of Biomedical Engineering, College of Engineering, Cornell University, Ithaca, NY 14853
| | - Kiersten J Gorse
- Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - Warren R Zipfel
- Department of Biomedical Engineering, College of Engineering, Cornell University, Ithaca, NY 14853
| | - Susan M Quirk
- Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853;
| |
Collapse
|
15
|
Deng CY, Yang H, Kuang SJ, Rao F, Xue YM, Zhou ZL, Liu XY, Shan ZX, Li XH, Lin QX, Wu SL, Yu XY. Upregulation of 5-hydroxytryptamine receptor signaling in coronary arteries after organ culture. PLoS One 2014; 9:e107128. [PMID: 25202989 PMCID: PMC4159325 DOI: 10.1371/journal.pone.0107128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 08/13/2014] [Indexed: 02/07/2023] Open
Abstract
Background 5-Hydroxytryptamine (5-HT) is a powerful constrictor of coronary arteries and is considered to be involved in the pathophysiological mechanisms of coronary-artery spasm. However, the mechanism of enhancement of coronary-artery constriction to 5-HT during the development of coronary artery disease remains to be elucidated. Organ culture of intact blood-vessel segments has been suggested as a model for the phenotypic changes of smooth muscle cells in cardiovascular disease. Methodology/Principal Findings We wished to characterize 5-HT receptor-induced vasoconstriction and quantify expression of 5-HT receptor signaling in cultured rat coronary arteries. Cumulative application of 5-HT produced a concentration-dependent vasoconstriction in fresh and 24 h-cultured rat coronary arteries without endothelia. 5-HT induced greater constriction in cultured coronary arteries than in fresh coronary arteries. U46619- and CaCl2-induced constriction in the two groups was comparable. 5-HT stimulates the 5-HT2A receptor and cascade of phospholipase C to induce coronary vasoconstriction. Calcium influx through L-type calcium channels and non-L-type calcium channels contributed to the coronary-artery constrictions induced by 5-HT. The contractions mediated by non-L-type calcium channels were significantly enhanced in cultured coronary arteries compared with fresh coronary arteries. The vasoconstriction induced by thapsigargin was also augmented in cultured coronary arteries. The decrease in Orai1 expression significantly inhibited 5-HT-evoked entry of Ca2+ in coronary artery cells. Expression of the 5-HT2A receptor, Orai1 and STIM1 were augmented in cultured coronary arteries compared with fresh coronary arteries. Conclusions An increased contraction in response to 5-HT was mediated by the upregulation of 5-HT2A receptors and downstream signaling in cultured coronary arteries.
Collapse
MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology
- Animals
- Calcium/metabolism
- Calcium Channels/genetics
- Calcium Channels/metabolism
- Calcium Channels, L-Type/genetics
- Calcium Channels, L-Type/metabolism
- Coronary Vessels/drug effects
- Coronary Vessels/metabolism
- Male
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- ORAI1 Protein
- Organ Culture Techniques/methods
- Rats
- Rats, Sprague-Dawley
- Receptor, Serotonin, 5-HT2A/genetics
- Receptor, Serotonin, 5-HT2A/metabolism
- Serotonin/genetics
- Serotonin/metabolism
- Signal Transduction/drug effects
- Signal Transduction/genetics
- Stromal Interaction Molecule 1
- Thapsigargin/pharmacology
- Up-Regulation/drug effects
- Up-Regulation/genetics
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
Collapse
Affiliation(s)
- Chun-Yu Deng
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Hui Yang
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Su-Juan Kuang
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Fang Rao
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Yu-Mei Xue
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Zhi-Ling Zhou
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Xiao-Ying Liu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Zhi-Xin Shan
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Xiao-Hong Li
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Qiu-Xiong Lin
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Shu-Lin Wu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- * E-mail: (SLW); (XYY)
| | - Xi-Yong Yu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- * E-mail: (SLW); (XYY)
| |
Collapse
|
16
|
Sutliff RL, Walp ER, Kim YH, Walker LA, El-Ali AM, Ma J, Bonsall R, Ramosevac S, Eaton DC, Verlander JW, Hansen L, Gleason RLJ, Pham TD, Hong S, Pech V, Wall SM. Contractile force is enhanced in Aortas from pendrin null mice due to stimulation of angiotensin II-dependent signaling. PLoS One 2014; 9:e105101. [PMID: 25148130 PMCID: PMC4141771 DOI: 10.1371/journal.pone.0105101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 07/20/2014] [Indexed: 11/19/2022] Open
Abstract
Pendrin is a Cl−/HCO3− exchanger expressed in the apical regions of renal intercalated cells. Following pendrin gene ablation, blood pressure falls, in part, from reduced renal NaCl absorption. We asked if pendrin is expressed in vascular tissue and if the lower blood pressure observed in pendrin null mice is accompanied by reduced vascular reactivity. Thus, the contractile responses to KCl and phenylephrine (PE) were examined in isometrically mounted thoracic aortas from wild-type and pendrin null mice. Although pendrin expression was not detected in the aorta, pendrin gene ablation changed contractile protein abundance and increased the maximal contractile response to PE when normalized to cross sectional area (CSA). However, the contractile sensitivity to this agent was unchanged. The increase in contractile force/cross sectional area observed in pendrin null mice was due to reduced cross sectional area of the aorta and not from increased contractile force per vessel. The pendrin-dependent increase in maximal contractile response was endothelium- and nitric oxide-independent and did not occur from changes in Ca2+ sensitivity or chronic changes in catecholamine production. However, application of 100 nM angiotensin II increased force/CSA more in aortas from pendrin null than from wild type mice. Moreover, angiotensin type 1 receptor inhibitor (candesartan) treatment in vivo eliminated the pendrin-dependent changes contractile protein abundance and changes in the contractile force/cross sectional area in response to PE. In conclusion, pendrin gene ablation increases aorta contractile force per cross sectional area in response to angiotensin II and PE due to stimulation of angiotensin type 1 receptor-dependent signaling. The angiotensin type 1 receptor-dependent increase in vascular reactivity may mitigate the fall in blood pressure observed with pendrin gene ablation.
Collapse
MESH Headings
- Angiotensin II/pharmacology
- Animals
- Anion Transport Proteins/deficiency
- Anion Transport Proteins/genetics
- Aorta/drug effects
- Aorta/metabolism
- Aorta/pathology
- Calcium/metabolism
- Catecholamines/biosynthesis
- Dose-Response Relationship, Drug
- Gene Expression
- Kidney/metabolism
- Male
- Mice
- Mice, Knockout
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Nitric Oxide/metabolism
- Phenylephrine/pharmacology
- Potassium Chloride/pharmacology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Angiotensin, Type 1/metabolism
- Signal Transduction/drug effects
- Sulfate Transporters
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
- Vasoconstrictor Agents/pharmacology
Collapse
Affiliation(s)
- Roy L. Sutliff
- Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, United States of America
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Erik R. Walp
- Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, United States of America
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Young Hee Kim
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Lori A. Walker
- Departments of Medicine and Cardiology, University of Colorado Health Sciences Center, Aurora, Colorado, United States of America
| | - Alexander M. El-Ali
- Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, United States of America
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Jing Ma
- Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, United States of America
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Robert Bonsall
- Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, Georgia, United States of America
| | - Semra Ramosevac
- Department of Physiology, Emory University, Atlanta, Georgia, United States of America
| | - Douglas C. Eaton
- Department of Physiology, Emory University, Atlanta, Georgia, United States of America
| | - Jill W. Verlander
- Department of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Laura Hansen
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Rudolph L. Jr. Gleason
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Truyen D. Pham
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Seongun Hong
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Vladimir Pech
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
| | - Susan M. Wall
- Department of Medicine, Emory University, Atlanta, Georgia, United States of America
- Department of Physiology, Emory University, Atlanta, Georgia, United States of America
- * E-mail:
| |
Collapse
|
17
|
Hirano K. [Potential of proteinase-activated receptors as a novel target for treatment of pulmonary hypertension]. Nihon Yakurigaku Zasshi 2014; 143:182-186. [PMID: 24717606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
|
18
|
Hermann A, Engelandt K, Rautenstrauss B, Reichmann H, Jacobasch E. Hemiplegic migraine with reversible cerebral vasoconstriction caused by ATP1A2 mutations. J Neurol 2013; 260:2172-4. [PMID: 23821026 DOI: 10.1007/s00415-013-7010-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 11/26/2022]
|
19
|
Aytekin M, Aulak KS, Haserodt S, Chakravarti R, Cody J, Minai OA, Dweik RA. Abnormal platelet aggregation in idiopathic pulmonary arterial hypertension: role of nitric oxide. Am J Physiol Lung Cell Mol Physiol 2012; 302:L512-20. [PMID: 22246002 PMCID: PMC3311529 DOI: 10.1152/ajplung.00289.2011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 01/04/2012] [Indexed: 11/22/2022] Open
Abstract
Idiopathic pulmonary arterial hypertension (IPAH) is a rare and progressive disease. Several processes are believed to lead to the fatal progressive pulmonary arterial narrowing seen in IPAH including vasoconstriction, cellular proliferation inflammation, vascular remodeling, abnormalities in the lung matrix, and in situ thrombosis. Nitric oxide (NO) produced by NO synthases (NOS) is a potent vasodilator and plays important roles in many other processes including platelet function. Reduced NO levels in patients with IPAH are known to contribute to the development of pulmonary hypertension and its complications. Platelet defects have been implied in IPAH, but original research supporting this hypothesis has been limited. Normal platelets are known to have NOS activity, but little is known about NOS expression and NO production by platelets in patients with IPAH. Here we characterized the phenotype of the platelets in IPAH and show a defect in their ability to be activated in vitro by thrombin receptor activating protein but not adenosine diphosphate. We also show that endothelial NOS (eNOS) levels in these platelets are reduced and demonstrate that NO is an important regulator of platelet function. Thus reduced levels of eNOS in platelets could impact their ability to regulate their own function appropriately.
Collapse
Affiliation(s)
- Metin Aytekin
- Department of Pathobiology/Lerner Research Institute, Cleveland Clinic, OH 44195, USA
| | | | | | | | | | | | | |
Collapse
|
20
|
Su MT, Lin SH, Chen YC. Genetic association studies of angiogenesis- and vasoconstriction-related genes in women with recurrent pregnancy loss: a systematic review and meta-analysis. Hum Reprod Update 2011; 17:803-12. [PMID: 21642294 DOI: 10.1093/humupd/dmr027] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Angiogenesis and an adequate blood supply are critical for several steps in human early pregnancy. Some studies have reported angiogenesis- and vasoconstriction-related genes are associated with recurrent pregnancy loss (RPL), but their sample size was limited. This study was conducted to investigate the genetic association between these angiogenesis- and vasoconstriction-related genes and idiopathic RPL, using meta-analyses. METHODS A systematic review of the published literature from MEDLINE and EMBASE databases was conducted and investigations of an angiogenesis- and vasoconstriction-related gene polymorphism in RPL reported more than three times were selected. Aggregating data from eligible studies were integrated into meta-analyses by means of random effects models. RESULTS Of 185 potentially relevant studies, 18 case-control studies comprising a total of 2397 RPL patients and 1760 controls were included into the meta-analyses. Among these genetic association studies were 4 reports of vascular endothelial growth factor (VEGF) (-1154G>A) polymorphisms, 4 reports of p53 (codon72) and 10 reports of endothelial nitric oxide synthase (eNOS) (B/A, Glu298Asp) with RPL. The integrated results showed that VEGF (-1154G>A), p53 (codon 72) and eNOS (Glu298Asp) polymorphisms were significantly associated with RPL, and their summary odd ratios [95% confidence interval (CI)] were 1.51 (1.13-2.03), 1.84(1.07-3.16) and 1.37 (1.11-1.69), respectively. The summary odd ratio of the eNOS (B/A) polymorphism in RPL was 1.15 (0.94-1.41), and failed to show significance at meta-analysis. CONCLUSIONS Meta-analyses of available data showed significant associations between the VEGF (-1154G>A), p53 (codon72) and eNOS (Glu298Asp) polymorphisms and idiopathic RPL. These angiogenesis- and vasoconstriction-related genes jointly confer higher susceptibility to idiopathic RPL.
Collapse
Affiliation(s)
- Mei-Tsz Su
- Division of Genetics, Department of Obstetrics and Gynecology, National Cheng Kung University College of Medicine, 138 Sheng-Li Road, Tainan 704, Taiwan.
| | | | | |
Collapse
|
21
|
Chen SP, Fuh JL, Wang SJ, Tsai SJ, Hong CJ, Yang AC. Brain-derived neurotrophic factor gene Val66Met polymorphism modulates reversible cerebral vasoconstriction syndromes. PLoS One 2011; 6:e18024. [PMID: 21437208 PMCID: PMC3060928 DOI: 10.1371/journal.pone.0018024] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Accepted: 02/18/2011] [Indexed: 11/28/2022] Open
Abstract
Background Reversible cerebral vasoconstriction syndrome (RCVS) could be complicated by cerebral ischemic events. Hypothetical mechanisms of RCVS involve endothelial dysfunction and sympathetic overactivity, both of which were reported to be related to brain-derived neurotrophic factor (BDNF). The study investigated the association between functional BDNF Val66Met polymorphism and RCVS. Methods Patients with RCVS and controls were prospectively recruited and genotyped for the BDNF Val66Met polymorphism. Magnetic resonance angiography (MRA) and transcranial color-coded Doppler sonography were employed to evaluate cerebral vasoconstriction. Genotyping results, clinical parameters, vasoconstriction scores, mean flow velocities of the middle cerebral artery (VMCA), and Lindegaard indices were analyzed. Split-sample approach was employed to internally validate the data. Principal Findings Ninety Taiwanese patients with RCVS and 180 age- and gender-matched normal controls of the same ethnicity completed the study. The genotype frequencies did not differ between patients and controls. Compared to patients with Met/Met homozygosity, patients with Val allele had higher mean vasoconstriction scores of all arterial segments (1.60±0.72 vs. 0.87±0.39, p<0.001), VMCA values (116.7±36.2 vs. 82.7±17.9 cm/s, p<0.001), and LI (2.41±0.91 vs. 1.89±0.41, p = 0.001). None of the Met/Met homozygotes, but 38.9% of the Val carriers, had VMCA values of >120 cm/s (p<0.001). Split-sample validation by randomization, age, entry time or residence of patients demonstrated concordant findings. Conclusions Our findings link BDNF Val66Met polymorphism with the severity of RCVS for the first time and implicate possible pathogenic mechanisms for vasoconstriction in RCVS.
Collapse
Affiliation(s)
- Shih-Pin Chen
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Jong-Ling Fuh
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Shuu-Jiun Wang
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
- * E-mail:
| | - Shih-Jen Tsai
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chen-Jee Hong
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Albert C. Yang
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| |
Collapse
|
22
|
Albinsson S, Suarez Y, Skoura A, Offermanns S, Miano JM, Sessa WC. MicroRNAs are necessary for vascular smooth muscle growth, differentiation, and function. Arterioscler Thromb Vasc Biol 2010; 30:1118-26. [PMID: 20378849 PMCID: PMC2880481 DOI: 10.1161/atvbaha.109.200873] [Citation(s) in RCA: 202] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Regulation of vascular smooth muscle (VSM) proliferation and contractile differentiation is an important factor in vascular development and subsequent cardiovascular diseases. Recently, microRNAs (miRNAs) have been shown to regulate fundamental cellular processes in a number of cell types, but the integrated role of miRNAs in VSM in blood vessels is unknown. Here, we investigated the role of miRNAs in VSM by deleting the rate-limiting enzyme in miRNA synthesis, Dicer. METHODS AND RESULTS Deletion of Dicer in VSM results in late embryonic lethality at embryonic day 16 to 17, associated with extensive internal hemorrhage. The loss of VSM Dicer results in dilated, thin-walled blood vessels caused by a reduction in cellular proliferation. In addition, blood vessels from VSM-deleted Dicer mice exhibited impaired contractility because of a loss of contractile protein markers. We found this effect to be associated with a loss of actin stress fibers and partly rescued by overexpression of microRNA (miR)-145 or myocardin. CONCLUSIONS Dicer-dependent miRNAs are important for VSM development and function by regulating proliferation and contractile differentiation.
Collapse
MESH Headings
- Actins/metabolism
- Animals
- Aorta/embryology
- Aorta/metabolism
- Aorta/pathology
- Cell Differentiation/genetics
- Cell Proliferation
- Cells, Cultured
- DEAD-box RNA Helicases/deficiency
- DEAD-box RNA Helicases/genetics
- Embryo Loss
- Endoribonucleases/deficiency
- Endoribonucleases/genetics
- Gene Expression Regulation, Developmental
- Genotype
- Gestational Age
- Hemorrhage/embryology
- Hemorrhage/genetics
- Hemorrhage/metabolism
- Integrases/genetics
- Liver Diseases/embryology
- Liver Diseases/genetics
- Liver Diseases/metabolism
- Male
- Mice
- Mice, Knockout
- MicroRNAs/metabolism
- Microfilament Proteins/genetics
- Muscle Development/genetics
- Muscle Proteins/genetics
- Muscle, Smooth, Vascular/embryology
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/physiopathology
- Muscle, Smooth, Vascular/ultrastructure
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- Phenotype
- Ribonuclease III
- Stress Fibers/metabolism
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcriptional Activation
- Transfection
- Umbilical Arteries/embryology
- Umbilical Arteries/metabolism
- Umbilical Arteries/pathology
- Vasoconstriction/genetics
- Vasodilation/genetics
Collapse
Affiliation(s)
- Sebastian Albinsson
- Department of Pharmacology and Vascular Biology and Therapeutics Program, Amistad Research Building, Yale University School of Medicine, New Haven, Connecticut 06519, USA
| | - Yajaira Suarez
- Immunobiology and Vascular Biology and Therapeutics Program, Amistad Research Building, Yale University School of Medicine, New Haven, Connecticut 06519, USA
| | - Athanasia Skoura
- Epidemiology and Public Health and Vascular Biology and Therapeutics Program, Amistad Research Building, Yale University School of Medicine, New Haven, Connecticut 06519, USA
| | - Stefan Offermanns
- Max-Planck-Institute for Heart and Lung Research, Parkstrasse 1, 61231 Bad Nauheim, Germany
| | - Joseph M. Miano
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - William C. Sessa
- Department of Pharmacology and Vascular Biology and Therapeutics Program, Amistad Research Building, Yale University School of Medicine, New Haven, Connecticut 06519, USA
| |
Collapse
|
23
|
Abstract
Regulators of G protein signaling (RGS) proteins are important modulators of G protein-coupled receptors and, therefore, critical for cardiovascular functions. One family member, RGS5, has recently been identified as a key regulator of vascular remodeling and pericyte maturation in tumors. Here, we discuss a potential role for RGS5 and its relatives, RGS2 and 4, within the cardiovascular system. Insights into RGS5 signaling are likely to be highly significant for vascular pathologies such as hypertension, atherosclerosis, and angiogenesis.
Collapse
Affiliation(s)
- Mitali Manzur
- Western Australian Institute for Medical Research, The University of Western Australia Centre for Medical Research, Perth, Western Australia 6000, Australia
| | | |
Collapse
|
24
|
Torshin II, Gromova OA, Nikonov AA. [Genes and cerebrovascular pathology (genes and nucleotide polymorphisms in some types of physiological shifts and pathological processes)]. Zh Nevrol Psikhiatr Im S S Korsakova 2009; 109:77-85. [PMID: 19938280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|
25
|
Jawien J, Bian Z, Sheikine Y, Olofsson PS, Pang Y, Edholm T, Dou Y, Metzger D, Hellström PM, Feil R, Hansson GK. Abrogation of mitochondrial transcription in smooth muscle cells impairs smooth muscle contractility and vascular tone. J Physiol Pharmacol 2008; 59:239-252. [PMID: 18622043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Accepted: 04/25/2008] [Indexed: 05/26/2023]
Abstract
BACKGROUND Smooth muscle cells (SMC) constitute the major contractile cell population of blood vessels and inner organs. SMC contraction depends on energy provided by adenosine triphosphate (ATP) catabolism, which can be generated through oxidative phosphorylation in mitochondria or by anaerobic glycolysis. Mitochondrial activity may also modulate smooth muscle tone by biotransformation of vasoactive mediators. Here, we study the role of mitochondrial DNA gene expression for vascular function in vivo. METHODS Since loss of functional mitochondria in SMC may not be compatible with normal development, we generated mice with inducible SMC-specific abrogation of the mitochondrial transcription factor A (Tfam). Deletion of this gene leads to dysfunctional mitochondria and prevents aerobic ATP production in affected cells. RESULTS Invasive blood pressure monitoring in live animals demonstrated that SMC specific Tfam deletion results in lower blood pressure and a defective blood-pressure response to stress, changes that were not compensated by increased heart rate. The contractility to agonists was reduced in arterial and gastric fundus strips from Tfam-deficient mice. Endothelium-dependent relaxation of arterial strips in response to ACh was also blunted. CONCLUSION Our data show that mitochondrial function is needed for normal gastric contraction, vascular tone, and maintenance of normal blood pressure.
Collapse
Affiliation(s)
- J Jawien
- Department of Medicine; Karolinska Institute, Stockholm, Sweden
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Tong XK, Hamel E. Transforming Growth Factor-β1 Impairs Endothelin-1-Mediated Contraction of Brain Vessels by Inducing Mitogen-Activated Protein (MAP) Kinase Phosphatase-1 and Inhibiting p38 MAP Kinase. Mol Pharmacol 2007; 72:1476-83. [PMID: 17848599 DOI: 10.1124/mol.107.039602] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Brain levels of transforming growth factor-beta1 (TGF-beta1) are increased in Alzheimer's disease and have been implicated in the associated cerebrovascular pathology. We recently reported that transgenic mice that overexpress TGF-beta1 (TGF+ mice) display, with aging, selectively reduced endothelin-1 (ET-1)-mediated contractions. Because ET-1 is a key regulator of cerebrovascular tone and homeostasis, we investigated how increased levels of TGF-beta1 could selectively alter this contractile response. We found that ETA receptors, via activation of p38 mitogen-activated protein (MAP) kinase, mediate the ET-1-induced contraction in mouse cerebral arteries, a response significantly decreased in aged TGF+ mice (-39%; p < 0.01) despite unaltered ETA receptor levels or affinity. In cerebrovascular smooth muscle cell cultures, long-term treatment with TGF-beta1 significantly decreased (>50%; p < 0.05) the ET-1-induced activation of the p38 MAPK/27-kDa heat shock protein (HSP27) signaling pathway. This occurred with no effect upstream to p38 MAP kinase but with the concomitant induction of mitogen-activated protein kinase phosphatase-1 (MKP-1) expression. Inhibition of MKP-1 expression with Ro-31-8220 or suppression of MKP-1 expression by short interfering RNA restored the ET-1-mediated p38 MAP kinase response. These results disclose a new role for long-term increases of TGF-beta1 in modulating cerebrovascular tone by dampening ET-1-mediated activation of the p38 MAPK/HSP27 signaling pathway. Such changes in ET-1-mediated signaling may help maintain vascular wall homeostasis by compensating for the diminished dilatory function induced by TGF-beta1 and amyloid-beta; brain levels of these two molecules are increased in patients with Alzheimer's disease.
Collapse
Affiliation(s)
- Xin-Kang Tong
- Laboratory of Cerebrovascular Research, Montreal Neurological Institute, McGill University, 3801 University St., Montréal, QC, Canada, H3A 2B4
| | | |
Collapse
|
27
|
Moreno L, Frazziano G, Cogolludo A, Cobeño L, Tamargo J, Perez-Vizcaino F. Role of Protein Kinase Cζ and Its Adaptor Protein p62 in Voltage-Gated Potassium Channel Modulation in Pulmonary Arteries. Mol Pharmacol 2007; 72:1301-9. [PMID: 17699685 DOI: 10.1124/mol.107.037002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Voltage-gated potassium (K(V)) channels play an essential role in regulating pulmonary artery function, and they underpin the phenomenon of hypoxic pulmonary vasoconstriction. Pulmonary hypertension is characterized by inappropriate vasoconstriction, vascular remodeling, and dysfunctional K(V) channels. In the current study, we aimed to elucidate the role of PKCzeta and its adaptor protein p62 in the modulation of K(V) channels. We report that the thromboxane A(2) analog 9,11-dideoxy-11alpha,9alpha-epoxymethano-prostaglandin F(2alpha) methyl acetate (U46619) inhibited K(V) currents in isolated mice pulmonary artery myocytes and the K(V) current carried by human cloned K(V)1.5 channels expressed in Ltk(-) cells. Using protein kinase C (PKC)zeta(-/-) and p62(-/-) mice, we demonstrate that these two proteins are involved in the K(V) channel inhibition. PKCzeta coimmunoprecipitated with K(V)1.5, and this interaction was markedly reduced in p62(-/-) mice. Pulmonary arteries from PKCzeta(-/-) mice also showed a diminished [Ca(2+)](i) and contractile response, whereas genetic inactivation of p62(-/-) resulted in an absent [Ca(2+)](i) response, but it preserved contractile response to U46619. These data demonstrate that PKCzeta and its adaptor protein p62 play a key role in the modulation of K(V) channel function in pulmonary arteries. These observations identify PKCzeta and/or p62 as potential therapeutic targets for the treatment of pulmonary hypertension.
Collapse
Affiliation(s)
- Laura Moreno
- Department of Pharmacology, School of Medicine, Universidad Complutense, 28040 Madrid, Spain
| | | | | | | | | | | |
Collapse
|
28
|
Kim JI, Kim SJ, Jung SW, Cho JY, Chung EJ, Kim M, Shin HM, Kim IK. IDENTIFICATION OF DIFFERENTIALLY EXPRESSED GENES AFTER HEAT SHOCK IN ISOLATED RAT AORTA. Clin Exp Pharmacol Physiol 2007; 34:636-40. [PMID: 17581221 DOI: 10.1111/j.1440-1681.2007.04620.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1. In a previous study, we demonstrated that heat shock augments vascular contractility through the stress response. 2. The current study was designed to identify differentially expressed genes after heat shock by using a novel annealing control primer (ACP) system, which was developed recently to identify authentic genes. 3. Rat aortic rings were mounted in organ baths, exposed to 42 degrees C for 45 min and harvested 4 h after the end of heat shock. Total RNA were used for amplification by the reverse transcriptase-polymerase chain reaction (RT-PCR) with ACP system. Differentially amplified PCR products were sequenced, searched against the GenBank and confirmed by RT-PCR. 4. Genes for connective tissue growth factor, stress-inducible protein 1 and heat shock protein 25 were upregulated, whereas a gene for interferon regulatory factor 1 was downregulated. Immunohistochemistry revealed upregulation of the phosphorylated form of Hsp25 in aortic rings after heat shock. 5. These results suggest that phosphorylated Hsp25 plays a pivotal role in the augmentation of vascular contraction after heat shock.
Collapse
Affiliation(s)
- Jee In Kim
- Department of Pharmacology, Kyungpook National University School of Medicine, Daegu, Korea.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Armitage JA, Ishibashi A, Balachandran AA, Jensen RI, Poston L, Taylor PD. Programmed aortic dysfunction and reduced Na+,K+-ATPase activity present in first generation offspring of lard-fed rats does not persist to the second generation. Exp Physiol 2007; 92:583-9. [PMID: 17255173 DOI: 10.1113/expphysiol.2006.036202] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have previously reported that male and female offspring of Sprague-Dawley rats fed a diet rich (approximately 50% of caloric intake from fat) in animal fat (lard) during pregnancy and suckling (OHF) demonstrate cardiovascular dysfunction, including blunted endothelium-dependent vasodilatation in the aorta as well as reduced renal Na(+),K(+)-ATPase activity. Cardiovascular dysfunction has been reported in other models of developmental programming and some researchers describe transmission from F(1) to F(2) generations. Here we report a study of vascular function, as assessed in isolated rings of aorta mounted in an organ bath, and renal Na(+),K(+)-ATPase activity in 6-month-old male and female F(2) offspring of lard-fed and control-fed (OC) dams (n = 13 per diet group). An increase in brain (OC 0.61 +/- 0.01% versus OHF 0.66 +/- 0.02% of bodyweight) and kidney weights (OC 0.32 +/- 0.01% versus OHF 0.37 +/- 0.01% of bodyweight) was observed in female F(2) offspring of lard-fed dams compared with F(2) controls (P < 0.03). Constrictor responses to phenylephrine in the aorta were not different from F(2) controls (repeated measures ANOVA, P = 0.85). Also, endothelium-dependent dilator function, as assessed by responses to acetylcholine (repeated measures ANOVA, P = 0.96) and passive distensibility in the absence of extracellular calcium (repeated measures ANOVA, P = 0.68), was similar. Additionally, renal Na(+),K(+)-ATPase activity was not statistically different from that observed in control animals (ANOVA, P = 0.89). Although a maternal diet rich in animal fat has deleterious effects on parameters of cardiovascular risk in F(1) animals, it does not appear that disorders previously reported in the F(1) generation are transmitted to the F(2) generation.
Collapse
Affiliation(s)
- James A Armitage
- Maternal and Fetal Research Unit, Division of Reproduction and Endocrinology, King's College London, 10th Floor North Wing, St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, UK
| | | | | | | | | | | |
Collapse
|
30
|
Abstract
Physiological responses to chronic hypoxia include polycythemia, pulmonary arterial remodeling, and vasoconstriction. Chronic hypoxia causes pulmonary arterial hypertension leading to right ventricular hypertrophy and heart failure. During pulmonary hypertension, pulmonary arteries exhibit increased expression of smooth muscle-alpha-actin and -myosin heavy chain. NFATc3 (nuclear factor of activated T cells isoform c3), which is aCa(2+)-dependent transcription factor, has been recently linked to smooth muscle phenotypic maintenance through the regulation of the expression of alpha-actin. The aim of this study was to determine if: (a) NFATc3 is expressed in murine pulmonary arteries, (b) hypoxia induces NFAT activation, (c) NFATc3 mediates the up-regulation of alpha-actin during chronic hypoxia, and (d) NFATc3 is involved in chronic hypoxia-induced pulmonary vascular remodeling. NFATc3 transcript and protein were found in pulmonary arteries. NFAT-luciferase reporter mice were exposed to normoxia (630 torr) or hypoxia (380 torr) for 2, 7, or 21 days. Exposure to hypoxia elicited a significant increase in luciferase activity and pulmonary arterial smooth muscle nuclear NFATc3 localization, demonstrating NFAT activation. Hypoxia induced up-regulation of alpha-actin and was prevented by the calcineurin/NFAT inhibitor, cyclosporin A (25 mg/kg/day s.c.). In addition, NFATc3 knock-out mice did not showed increased alpha-actin levels and arterial wall thickness after hypoxia. These results strongly suggest that NFATc3 plays a role in the chronic hypoxia-induced vascular changes that underlie pulmonary hypertension.
Collapse
MESH Headings
- Actins/biosynthesis
- Actins/genetics
- Active Transport, Cell Nucleus/drug effects
- Active Transport, Cell Nucleus/genetics
- Animals
- Calcineurin/metabolism
- Calcineurin Inhibitors
- Cardiomyopathy, Hypertrophic/genetics
- Cardiomyopathy, Hypertrophic/metabolism
- Cardiomyopathy, Hypertrophic/pathology
- Cardiomyopathy, Hypertrophic/physiopathology
- Cell Nucleus/metabolism
- Chronic Disease
- Cyclosporine/pharmacology
- Enzyme Inhibitors/pharmacology
- Hypertension, Pulmonary/genetics
- Hypertension, Pulmonary/metabolism
- Hypertension, Pulmonary/pathology
- Hypertension, Pulmonary/physiopathology
- Hypoxia/genetics
- Hypoxia/metabolism
- Hypoxia/pathology
- Hypoxia/physiopathology
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- NFATC Transcription Factors/antagonists & inhibitors
- NFATC Transcription Factors/deficiency
- NFATC Transcription Factors/metabolism
- Polycythemia/genetics
- Polycythemia/metabolism
- Polycythemia/pathology
- Polycythemia/physiopathology
- Pulmonary Artery/metabolism
- Pulmonary Artery/pathology
- Pulmonary Artery/physiopathology
- Up-Regulation/drug effects
- Up-Regulation/genetics
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
- Ventricular Remodeling/drug effects
- Ventricular Remodeling/genetics
Collapse
Affiliation(s)
- Sergio de Frutos
- Department of Cell Biology and Physiology, School of Medicine, University of New Mexico, Albuquerque, New Mexico 87131, USA
| | | | | | | |
Collapse
|
31
|
Ralay Ranaivo H, Carusio N, Wangensteen R, Ohlmann P, Loichot C, Tesse A, Chalupsky K, Lobysheva I, Haiech J, Watterson DM, Andriantsitohaina R. Protection against endotoxic shock as a consequence of reduced nitrosative stress in MLCK210-null mice. Am J Pathol 2007; 170:439-46. [PMID: 17255312 PMCID: PMC1851870 DOI: 10.2353/ajpath.2007.060219] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This study investigated the consequences of deletion of the long isoform of myosin light chain kinase (MLCK210) on the cardiovascular changes induced by the bacterial endotoxin lipopolysaccharide (LPS) and cecal ligation puncture using MLCK210-/- mice. Here, we provide evidence that deletion of MLCK210 enhanced survival after intraperitoneal injection of LPS or cecal ligation puncture. LPS-induced vascular hyporeactivity to vasoconstrictor agents was completely prevented in aorta from MLCK210-/- mice. This was associated with a decreased up-regulation of nuclear facor-kappaB expression and activity, inducible nitric-oxide synthase, and level of oxidative stress in the vascular media. Furthermore, LPS-induced increase of nitric oxide production in the circulation and tissues (including heart, liver, and lung) that was correlated with an increased expression of inducible nitric-oxide synthase was also reduced in MLCK210-/- mice. These data demonstrate a role for MLCK210 in endotoxin shock injury associated with oxidative and nitrosative stresses and vascular hyporeactivity.
Collapse
|
32
|
Gaucher C, Devaux C, Boura C, Lacolley P, Stoltz JF, Menu P. In vitro impact of physiological shear stress on endothelial cells gene expression profile. Clin Hemorheol Microcirc 2007; 37:99-107. [PMID: 17641400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In the vascular system, the shear applied to the vascular wall activates mechano-sensors located on endothelial cells (ECs) leading to a modification in the gene expression profile. We applied laminar shear stress at 1 Pa on ECs for 6 h and measured by quantitative real time PCR the expression modulation of genes implied in inflammation (ICAM-1 and E-selectin), oxidative stress sensing (HO-1) and vascular tone modulation (eNOS). We showed that all these genes are shear stress inducible. ICAM-1 is more up-regulated than E-selectin suggesting different levels of implication in inflammatory responses and different modes of induction (SSRE, cytokine). Laminar shear stress induces an oxidative stress translated into HO-1 up-regulation, and a possible vasodilatation through the induction of eNOS. Our laminar shear stress system opens a novel and interesting frame in the evaluation of the impact on ECs and blood cells of new pharmacological substances injected in the bloodstream.
Collapse
Affiliation(s)
- C Gaucher
- Groupe Mécanique et Ingénierie Cellulaire et Tissulaire, LEMTA-UMR 7563 IFR 111, Faculté de médecine, Vandoeuvre-lès-Nancy, France.
| | | | | | | | | | | |
Collapse
|
33
|
Cherkas LF, Williams FMK, Carter L, Howell K, Black CM, Spector TD, MacGregor AJ. Heritability of Raynaud's phenomenon and vascular responsiveness to cold: A study of adult female twins. ACTA ACUST UNITED AC 2007; 57:524-8. [PMID: 17394182 DOI: 10.1002/art.22626] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- L F Cherkas
- Twin Research and Genetic Epidemiology Unit, St. Thomas' Hospital, Kings College, London, UK.
| | | | | | | | | | | | | |
Collapse
|
34
|
Laukeviciene A, Brecht S, Kevelaitis E, Herdegen T. Enhanced contractility of small blood vessels in JNK knockout mice. Eur J Pharm Sci 2006; 29:335-9. [PMID: 16949803 DOI: 10.1016/j.ejps.2006.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2005] [Revised: 06/12/2006] [Accepted: 06/30/2006] [Indexed: 11/23/2022]
Abstract
The c-Jun N-terminal kinases (JNKs) form a subfamily of the mitogen-activated protein kinases (MAPK). These signalling pathways regulate various processes such as mitosis, cellular differentiation, stress response or apoptosis in multicellular organisms. There is rising evidence about the role of JNKs activities in neurodegenerative and metabolic diseases as well as in immunological disorders. The physiological functions of JNKs, however, remain to be elucidated. Recent data have demonstrated an essential role of JNKs in the cardiovascular system and the regulation of carbon hydrate and glucose metabolism. Therefore, we have investigated the contractility of blood vessels in mice with genetically deleted JNK1, JNK2, JNK3 and JNK2+3 isoforms and their respective wildtypes. The contractility of the isolated segments from A. carotis communis was measured by small blood vessel wire myograph. Contraction induced by 80 mM KCl was significantly increased in arteries from JNK2+3 double knockout compared to controls and single knockouts. The maximal contraction generated by the alpha-agonists phenylephrine or noradrenaline (10 microM) was significantly enhanced in JNK2+3 knockout arteries compared with arteries from the remaining strains. Inhibition of NOS by Nw-nitro-l-arginine did not change the pattern of vasoconstriction, but vasoconstriction by noradrenaline following NOS inhibition was significantly enhanced in the arteries from JNK2+3 double knockout mice. In conclusion, genetic deletion of JNK2+3 in mice results in altered contractility of carotid arteries and this might depend on the function of the smooth muscles rather than on the endothelium. These findings have implications for the long-term treatment with pharmacological JNK inhibitors for neurodegenerative or metabolic diseases such as stroke or diabetes.
Collapse
Affiliation(s)
- Ale Laukeviciene
- Department of Physiology, Kaunas University of Medicine, Mickeviciaus 9, LT-44307 Kaunas, Lithuania.
| | | | | | | |
Collapse
|
35
|
Abstract
PURPOSE OF REVIEW Postural tachycardia syndrome is an autonomic disorder primarily of younger women. The patient population is heterogeneous, making diagnosis and treatment a challenge. A mutation in the norepinephrine (noradrenaline) transporter gene prompted further genetic analysis. RECENT FINDINGS Eleven new mutations were found in the human norepinephrine transporter gene, although none were directly associated with postural tachycardia syndrome. The 5'-flanking -1012C --> T variant of the dopamine beta-hydroxylase gene was slightly increased and protection was associated with a reduced incidence of two mutations in the endothelial nitric oxide synthase gene, and one in endothelin-1. Mutations in other disease-related genes suggest a potential relationship with the pathogenesis of postural tachycardia syndrome. Benign joint hypermobility syndrome, for example, shares similar autonomic symptoms and is linked to a mutation in tenascin-X. Additional genetic findings are discussed as potential contributors to vascular health and neurodegeneration. SUMMARY Genetic testing can reveal molecular mechanisms of disease and provide an additional strategy for diagnosis and treatment of heterogeneous patient populations such as postural tachycardia syndrome. It is quite likely that the pathogenesis of this disorder will be attributed to numerous genetic mutations, both subtle and overt. Therefore, continued study of the relationships between genotype and phenotype are necessary to better understand this syndrome and others with associated dysautonomia.
Collapse
Affiliation(s)
- Nancy R Keller
- Autonomic Dysfunction Center, Division of Clinical Pharmacology, Departments of Medicine, Pharmacology and Neurology, Tennessee, USA
| | | |
Collapse
|
36
|
Araya R, Noguchi T, Yuhki M, Kitamura N, Higuchi M, Saido TC, Seki K, Itohara S, Kawano M, Tanemura K, Takashima A, Yamada K, Kondoh Y, Kanno I, Wess J, Yamada M. Loss of M5 muscarinic acetylcholine receptors leads to cerebrovascular and neuronal abnormalities and cognitive deficits in mice. Neurobiol Dis 2006; 24:334-44. [PMID: 16956767 DOI: 10.1016/j.nbd.2006.07.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Revised: 06/13/2006] [Accepted: 07/17/2006] [Indexed: 10/24/2022] Open
Abstract
The M5 muscarinic acetylcholine receptor (M5R) has been shown to play a crucial role in mediating acetylcholine-dependent dilation of cerebral blood vessels. We show that male M5R-/- mice displayed constitutive constriction of cerebral arteries using magnetic resonance angiography in vivo. Male M5R-/- mice exhibited a significantly reduced cerebral blood flow (CBF) in the cerebral cortex, hippocampus, basal ganglia, and thalamus. Cortical and hippocampal pyramidal neurons from M5R-/- mice showed neuronal atrophy. Hippocampus-dependent spatial and nonspatial memory was also impaired in M5R-/- mice. In M5R-/- mice, CA3 pyramidal cells displayed a significantly attenuated frequency of the spontaneous postsynaptic current and long-term potentiation was significantly impaired at the mossy fiber-CA3 synapse. Our findings suggest that impaired M5R signaling may play a role in the pathophysiology of cerebrovascular deficits. The M5 receptor may represent an attractive novel therapeutic target to ameliorate memory deficits caused by impaired cerebrovascular function.
Collapse
Affiliation(s)
- Runa Araya
- Yamada Research Unit, RIKEN Brain Science Institute, Saitama 351-0198, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Elliott CG, Glissmeyer EW, Havlena GT, Carlquist J, McKinney JT, Rich S, McGoon MD, Scholand MB, Kim M, Jensen RL, Schmidt JW, Ward K. Relationship of
BMPR2
Mutations to Vasoreactivity in Pulmonary Arterial Hypertension. Circulation 2006; 113:2509-15. [PMID: 16717148 DOI: 10.1161/circulationaha.105.601930] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Vasoreactivity tests are fundamental in evaluating pulmonary arterial hypertension (PAH). Mutations of the transforming growth factor-β type II receptor gene,
BMPR2
, predispose to the development of pulmonary hypertension and may alter the response to vasodilators. Previous investigations have not examined the relationship of
BMPR2
mutations to vasoreactivity.
Methods and Results—
We identified 133 consecutive unrelated patients with either idiopathic or familial PAH. Sixty-six patients were excluded because we lacked either DNA samples (n=18) or complete data from a vasoreactivity test (n=48). The remaining 67 patients were screened for
BMPR2
DNA sequence variations, and specific variations were confirmed by gene sequencing. The vasoreactivity of patients with nonsynonymous
BMPR2
variations was compared with that of patients without nonsynonymous
BMPR2
variations. We found nonsynonymous
BMPR2
variations in 27 of 67 patients with idiopathic (n=16 of 52) or familial (n=11 of 15) PAH. Vasoreactivity was identified in 3.7% of 27 patients with nonsynonymous
BMPR2
variations and in 35% of 40 patients without nonsynonymous
BMPR2
variations (
P
=0.003). Five of the 27 nonsynonymous variations occur commonly in healthy individuals. None of the remaining 22 patients with
BMPR2
variations demonstrated vasoreactivity, and the analysis remained unchanged when we assumed that nonsynonymous
BMPR2
variations were present in all 15 patients with familial PAH.
Conclusions—
Patients with familial or idiopathic PAH and nonsynonymous
BMPR2
variations are unlikely to demonstrate vasoreactivity. Further trials are required to determine whether long-term therapy can be directed by tests for
BMPR2
variations.
Collapse
Affiliation(s)
- C Gregory Elliott
- LDS Hospital, University of Utah School of Medicine, Salt Lake City, Utah, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
|
39
|
Belcher JD, Mahaseth H, Welch TE, Otterbein LE, Hebbel RP, Vercellotti GM. Heme oxygenase-1 is a modulator of inflammation and vaso-occlusion in transgenic sickle mice. J Clin Invest 2006; 116:808-16. [PMID: 16485041 PMCID: PMC1366501 DOI: 10.1172/jci26857] [Citation(s) in RCA: 204] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2005] [Accepted: 12/13/2005] [Indexed: 01/29/2023] Open
Abstract
Transgenic sickle mice expressing betaS hemoglobin have activated vascular endothelium that exhibits enhanced expression of NF-kappaB and adhesion molecules that promote vascular stasis in sickle, but not in normal, mice in response to hypoxia/reoxygenation. Sickle mice hemolyze rbcs in vivo as demonstrated by increased reticulocyte counts, plasma hemoglobin and bilirubin, and reduced plasma haptoglobin. The heme content is elevated in sickle organs, which promotes vascular inflammation and heme oxygenase-1 expression. Treatment of sickle mice with hemin further increases heme oxygenase-1 expression and inhibits hypoxia/reoxygenation-induced stasis, leukocyte-endothelium interactions, and NF-kappaB, VCAM-1, and ICAM-1 expression. Heme oxygenase inhibition by tin protoporphyrin exacerbates stasis in sickle mice. Furthermore, treatment of sickle mice with the heme oxygenase enzymatic product carbon monoxide or biliverdin inhibits stasis and NF-kappaB, VCAM-1, and ICAM-1 expression. Local administration of heme oxygenase-1 adenovirus to subcutaneous skin increases heme oxygenase-1 and inhibits hypoxia/reoxygenation-induced stasis in the skin of sickle mice. Heme oxygenase-1 plays a vital role in the inhibition of vaso-occlusion in transgenic sickle mice.
Collapse
Affiliation(s)
- John D Belcher
- Division of Hematology, Oncology, and Transplantation, Department of Medicine and Vascular Biology Center, University of Minnesota, Minneapolis, Minnesota 55455, USA.
| | | | | | | | | | | |
Collapse
|
40
|
Abstract
OBJECTIVES Alpha-2B adrenoceptors (AR) mediate vasoconstriction in the mice. A human alpha-2B AR deletion (D) variant has been associated with loss of short-term agonist-promoted receptor desensitization, which may lead to increased vasoconstriction upon alpha-2 AR activation. This study tested the hypothesis that alpha-2 AR activation will induce enhanced vasoconstriction in carriers of the alpha-2B AR DD genotype, compared to carriers of the II or the DI genotypes. METHODS We administered 1 microg/kg dexmedetomidine (an alpha-2 agonist) intravenously to 80 surgical patients in whom sympatholytic effects of the drug were attenuated by general anesthesia. Measurements were made of finger blood volume (an indicator of vasoconstriction) by photoplethysmographic determination of light transmission through a finger (LTF) and of hemodynamic variables. RESULTS Dexmedetomidine increased LTF (vasoconstriction), induced an initial increase in systolic blood pressure and decreased heart rate in all genotype groups (P<0.0001 for all). Three min after the start of dexmedetomidine infusion, the increase in LTF was more pronounced (P=0.014) in the DD group compared to the DI and II groups. There were no significant differences in LTF values between the groups at the end of or 5 min after dexmedetomidine infusion. There were no differences in systolic blood pressure or heart rate values between the groups during or after the dexmedetomidine infusion. CONCLUSIONS The results of this study confirm that the alpha-2 agonist dexmedetomidine induced marked peripheral vasoconstriction. Subjects with the alpha 2B DD genotype had an enhanced vasoconstrictive response at the beginning of dexmedetomidine infusion. However, this enhanced vasoconstrictive response was not sustained throughout or after the 15-min dexmedetomidine infusion.
Collapse
Affiliation(s)
- Pekka Talke
- Department of Anesthesia and Perioperative Medicine, University of California, San Francisco, California 94143-0648, USA.
| | | | | | | | | | | |
Collapse
|
41
|
Flynn CR, Brophy CM, Furnish EJ, Komalavilas P, Tessier D, Thresher J, Joshi L. Transduction of phosphorylated heat shock-related protein 20, HSP20, prevents vasospasm of human umbilical artery smooth muscle. J Appl Physiol (1985) 2005; 98:1836-45. [PMID: 15829720 DOI: 10.1152/japplphysiol.01043.2004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Activation of cyclic nucleotide-dependent signaling pathways inhibits agonist-induced contraction of most vascular smooth muscles except human umbilical artery smooth muscle (HUASM). This impaired vasorelaxation may contribute to complications associated with preeclampsia, intrauterine growth restriction, and preterm delivery. Cyclic nucleotide-dependent signaling pathways converge at the phosphorylation of the small heat shock-related protein HSP20, causing relaxation of vascular smooth muscle. We produced recombinant proteins containing a protein transduction domain linked to HSP20 (rTAT-HSP20). Pretreatment of HUASM with in vitro phosphorylated rTAT-HSP20 (rTAT-pHSP20) significantly inhibited serotonin-induced contraction, without a decrease in myosin light chain phosphorylation. rTAT-pHSP20 remained phosphorylated upon transduction into isolated HUASM as demonstrated by two-dimensional gel electrophoresis. Transduction of peptide analogs of phospho-HSP20 containing the phosphorylation site on HSP20 and phosphatase-resistant mimics of the phosphorylation site (S16E) also inhibited HUASM contraction. These data suggest that impaired relaxation of HUASM may result from decreased levels of phosphorylated HSP20. Protein transduction can be used to restore intracellular expression levels and the associated physiological response. Transduction of posttranslationally modified substrate proteins represents a proteomic-based therapeutic approach that may be particularly useful when the expression of downstream substrate proteins is downregulated.
Collapse
Affiliation(s)
- Charles R Flynn
- The Biodesign Institute, Arizona State Univeristy, Tempe, AZ 85287-9709, USA
| | | | | | | | | | | | | |
Collapse
|
42
|
Bolz H, Bolz SS, Schade G, Kothe C, Mohrmann G, Hess M, Gal A. Impaired calmodulin binding of myosin-7A causes autosomal dominant hearing loss (DFNA11). Hum Mutat 2005; 24:274-5. [PMID: 15300860 DOI: 10.1002/humu.9272] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Both myosin 7A (MYO7A) and calmodulin (CaM) are required for transduction and adaptation processes in inner ear hair cells. We identified a novel heterozygous missense mutation (c.2557C>T; p.R853C) in a family with autosomal dominant non-syndromic hearing loss that changes an evolutionarily invariant residue of the fifth IQ motif (IQ5), a putative calmodulin (CaM) binding domain, of MYO7A. Functional effects of the p.R853C mutation were investigated in a physiological cellular environment by expressing MYO7A IQ5-containing peptides in smooth muscle cells of microarteries, in which overexpression of wildtype IQ5 (with intact calmodulin binding) would be expected to compete with myosin light chain kinase (MLCK) for CaM binding. Indeed, analysis of calmodulin-dependent vasoconstriction suggests constitutive binding of CaM to the wildtype, but not the p.R853C-mutated IQ5 motif at all physiologically relevant Ca2+ concentrations. Thus our data suggest a disturbed CaM/MYO7A binding of the p.R853C mutant, this amino acid change may result in impaired adaptation to environmental stimuli and progressive deterioration of hearing transduction in heterozygotes. A defect in CaM/MYO7A interaction represents a novel pathomechanism for genetic hearing loss. It provides an attractive molecular target for therapeutic interventions aimed to delay or prevent the onset of hearing loss in families with mutations in myosin IQ domains.
Collapse
Affiliation(s)
- Hanno Bolz
- Institut für Humangenetik, Universitätsklinikum Hamburg-Eppendorf, Butenfeld 42, Hamburg, Germany.
| | | | | | | | | | | | | |
Collapse
|
43
|
Zhang F, Deng H, Kemp R, Singh H, Gopal VR, Falck JR, Laniado-Schwartzman M, Nasjletti A. Decreased Levels of Cytochrome P450 2E1–Derived Eicosanoids Sensitize Renal Arteries to Constrictor Agonists in Spontaneously Hypertensive Rats. Hypertension 2005; 45:103-8. [PMID: 15569854 DOI: 10.1161/01.hyp.0000150782.28485.91] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We compared renal interlobar arteries of spontaneously hypertensive rats (SHR) and Wistar-Kyoto rats (WKY) in terms of cytochrome P450 (CYP) 4A and CYP2E1 protein expression; levels of 20-HETE, 19-HETE, and 18-HETE; and responsiveness to phenylephrine in the absence and presence of
N-
methylsulfonyl-12,12-dibromododec-11-enamide (DDMS; 30 μmol/L), a CYP4A inhibitor. Relative to data in WKY, arteries of SHR exhibited diminished (
P
<0.05) CYP2E1 and levels of 19-HETE (66.7±6.0 versus 44.9±2.8 pmol/mg) and 18-HETE (13.8±1.6 versus 7.9±0.5 pmol/mg), whereas CYP4A and 20-HETE levels (99.3±9.1 versus 98.9±12.8 pmol/mg) were unchanged. Phenylephrine contracted vascular rings of SHR and WKY; the R
max
was similar in both strains, but SHR vessels were more sensitive as denoted by the lower (
P
<0.05) EC
50
(0.28±0.07 versus 0.71±0.12 μmol/L). DDMS decreased 20-HETE and, to a lesser extent, 19-HETE, while increasing (
P
<0.05) the EC
50
for phenylephrine by 475% and 54% in vessels of SHR and WKY, respectively. The desensitizing effect of DDMS was reversed by 20-HETE. Notably, the minimal concentration of 20-HETE that decreased the EC
50
for phenylephrine in DDMS-treated vessels was smaller in SHR (0.1 μmol/L) than WKY (10 μmol/L), and the sensitizing effect of 20-HETE was blunted (
P
<0.05) by the (R) stereoisomers of 19-HETE and 18-HETE. We conclude that the increased sensitivity to phenylephrine in arteries of SHR is attributable to a vasoregulatory imbalance produced by a deficit in vascular CYP2E1-derived products, most likely 19(R)-HETE and 18(R)-HETE, which condition amplification of the sensitizing action of 20-HETE.
Collapse
Affiliation(s)
- Fan Zhang
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Jeon BH, Gupta G, Park YC, Qi B, Haile A, Khanday FA, Liu YX, Kim JM, Ozaki M, White AR, Berkowitz DE, Irani K. Apurinic/apyrimidinic endonuclease 1 regulates endothelial NO production and vascular tone. Circ Res 2004; 95:902-10. [PMID: 15472121 DOI: 10.1161/01.res.0000146947.84294.4c] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The dual-function protein apurinic/apyrimidinic endonuclease/redox factor-1 (APE1/ref-1) is essential for DNA repair and also governs the reductive activation of many redox-sensitive transcription factors. We examined the role of APE1/ref-1 in regulation of endothelium-dependent tone and systemic blood pressure. APE1/ref-1+/- mice have impaired endothelium-dependent vasorelaxation, reduced vascular NO levels, and are hypertensive. APE1/ref-1 upregulates H-ras expression and leads to H-ras-mediated, phosphoinositide-3 kinase/Akt kinase-dependent calcium sensitization of endothelial NO synthase (eNOS), stimulating NO production. The reducing property of APE1/ref-1 is essential for upregulation of H-ras and for the calcium sensitization of eNOS. These findings uncover a novel physiological role for APE1/ref-1 in regulating vascular tone by governance of eNOS activity and bioavailable NO.
Collapse
Affiliation(s)
- Byeong Hwa Jeon
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21214, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Miyashita K, Itoh H, Nakao K. [Significant roles of natriuretic peptides in vascular physiology]. Nihon Rinsho 2004; 62 Suppl 9:51-5. [PMID: 15506336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- Kazutoshi Miyashita
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine
| | | | | |
Collapse
|
46
|
Park K, Itoh H, Nakao K. [Current status and future prospects of C-type natriuretic peptide]. Nihon Rinsho 2004; 62 Suppl 9:151-6. [PMID: 15506360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- Kwijun Park
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine
| | | | | |
Collapse
|
47
|
Buchholz T, Lohse P, Kosian E, Thaler CJ. Vasoconstrictively acting AT1R A1166C and NOS3 4/5 polymorphisms in recurrent spontaneous abortions (RSA). Am J Reprod Immunol 2004; 51:323-8. [PMID: 15212666 DOI: 10.1111/j.1600-0897.2004.00163.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
PROBLEM Inadequate uteroplacental perfusion is one of the main reasons for recurrent spontaneous abortions (RSA). Coagulation, fibrinolysis, and vasoconstriction affect tissue perfusion. These systems are regulated by different gene products. Polymorphisms can modulate the expression levels of the respective genes and can thereby affect perfusion. Vasoconstriction is influenced by the expression of endothelial nitric oxide synthase (eNOS) and of the angiotensinogen II type 1 receptor (AT1R). METHOD The aim of our study was to investigate, whether two polymorphisms in the AT1R and NOS3 genes shown to result in maternal vasoconstriction are associated with an increased risk for RSA. RESULTS Our data indicate that the vasoconstrictively acting genotypes AT1R C/C and NOS3 4/4 are of similar prevalence in RSA patients and in controls. CONCLUSION Results do not show any influence of the polymorphisms studied on early pregnancy development. This is in concordance with the concept of an independent regulation of placental perfusion.
Collapse
Affiliation(s)
- Tina Buchholz
- Department of Obstetrics and Gynecology - Grosshadern, Klinikum der Universität München, Germany
| | | | | | | |
Collapse
|
48
|
Abstract
Hepatic ischemia and reperfusion (I/R) predisposes the liver to secondary stresses such as endotoxemia, possibly via dysregulation of the hepatic microcirculation secondary to an imbalanced regulation of the vascular stress genes. In this study, the effect of hepatic I/R on the hepatic vasoregulatory gene expression in response to endotoxin was determined. Rats were subjected to 90 min of hepatic ischemia and 6 h of reperfusion. Lipopolysaccharide (LPS, 1 mg/kg) was injected intraperitoneally after reperfusion. Plasma and liver samples were obtained 6 h after reperfusion for serum aminotransferase assays and RT-PCR analysis of the mRNA for the genes of interest: endothelin-1 (ET-1), its receptors ET A and ET B, endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), heme oxygenase-1 (HO-1), cyclooxygenase-2 (COX-2), and tumor necrosis factor-alpha (TNF-alpha). The activities of serum aminotransferases were significantly increased in the I/R group. This increase was markedly potentiated by LPS treatment. The ET-1 mRNA was increased by LPS alone, and this increase was significantly greater in both the I/R alone and I/R + LPS groups compared to the sham. There were no significant differences in ET A receptor mRNA levels among any of the experimental groups. ET B mRNA was increased by both LPS alone and I/R alone, with no significant difference between the I/R alone and I/R + LPS groups. The eNOS and HO-1 transcripts were increased by I/R alone and further increased by I/R + LPS. The iNOS mRNA levels were increased by I/R alone, but increased significantly more by both LPS alone and I/R + LPS compared to I/R alone. The TNF-alpha mRNA levels showed no change with I/R alone, but were increased by both LPS alone and I/R + LPS. The COX-2 expression was increased significantly by I/R alone and significantly more by I/R + LPS. Taken collectively, significantly greater induction of the vasodilator genes over the constriction forces was observed with I/R + LPS. These results may partly explain the increased susceptibility of ischemic livers to injury as a result of endotoxemia.
Collapse
Affiliation(s)
- Sung-Ho Kim
- College of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu Suwon-si, Gyeonggi-do 440-746, Korea
| | | |
Collapse
|
49
|
Sofowora GG, Dishy V, Landau R, Xie HG, Prasad HC, Byrne DW, Smiley RM, Kim RB, Wood AJJ, Stein CM. $alpha;1A-adrenergic receptor polymorphism and vascular response*1, *2. Clin Pharmacol Ther 2004; 75:539-45. [PMID: 15179408 DOI: 10.1016/j.clpt.2004.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The alpha(1A)-adrenergic receptor is highly expressed in human vasculature including resistance arteries and veins, and its stimulation is primarily responsible for adrenergically mediated smooth muscle contraction. Variability in sensitivity to phenylephrine, an alpha(1A) adrenergic agonist, has a large genetic component. We examined the hypothesis that a common polymorphism of alpha(1A)-adrenergic receptor (Arg347Cys) affects in vivo response. METHODS We measured vascular sensitivity to phenylephrine using the dorsal hand vein linear variable differential transformer technique and determined alpha(1A)-adrenergic receptor genotype in 74 healthy, nonsmoking adults (28 Arg/Arg, 30 Arg/Cys, and 16 Cys/Cys). RESULTS Sensitivity to phenylephrine, expressed as the dose of phenylephrine resulting in 50% venoconstriction (Phe(50)), was not significantly different in subjects with the 3 alpha(1A) adrenergic receptor genotypes: Phe(50) geometric mean (95% confidence interval) was 513 ng/min (287-918 ng/min) for Arg/Arg, 431 ng/min (274-680 ng/min) for Arg/Cys, and 471 ng/min (197-1124 ng/min) for Cys/Cys (P =.90). CONCLUSION We conclude that the Arg347Cys receptor polymorphism does not alter agonist-mediated venoconstriction in vivo.
Collapse
Affiliation(s)
- Gbenga G Sofowora
- Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Abstract
BACKGROUND The pathogenesis of essential hypertension in blacks may differ from that in whites. In particular, black patients usually present with a salt-sensitive, low-renin form, which in animal models is associated with enhanced activity of endothelin-1 (ET-1). This study aimed to assess whether ethnic differences exist in the vascular activity of ET-1 in normotensive and hypertensive blacks and whites. METHODS AND RESULTS Forearm blood flow (FBF) responses to intraarterial infusion of an ET(A) receptor blocker (BQ-123) were analyzed by plethysmography in 37 normotensive patients and 27 hypertensive patients according to race. BQ-123 did not affect FBF in normotensive subjects (P=0.30), whereas it produced significant vasodilation in hypertensive subjects (P<0.001). In normotensives, FBF response to BQ-123 was similar in white (n =22) and black (n =15) patients (P=0.85). In contrast, in hypertensive patients, the vasodilator effect of ET(A) receptor blockade was significantly higher in blacks (n =13) than in whites (n =14) (P=0.01). To rule out differences in smooth muscle reactivity, the effects of race on FBF responses to exogenous ET-1 were analyzed in the hypertensive subgroups. Endothelin-1 induced a significant vasoconstriction in both white (n =7) and black patients (n =5) (both P<0.001), without differences between them (P=0.46). In 8 black hypertensives, the response to selective ET(A) blockade was not modified by nonselective blockade of ET-1 receptors by co-infusion of BQ-123 and BQ-788 (P=0.66). CONCLUSIONS Hypertensive blacks have enhanced ET(A)-dependent vasoconstrictor tone, probably related to increased production of ET-1. Given the negative vascular effects of ET-1, this abnormality may contribute to the pathogenesis of hypertension and its complications in black patients.
Collapse
Affiliation(s)
- Umberto Campia
- National Heart, Lung, and Blood Institute, Bethesda, Md, USA
| | | | | |
Collapse
|