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https://www.readbyqxmd.com/read/28330086/cloning-expression-purification-and-characterization-of-human-mitochondrial-carbonic-anhydrase-va
#1
Danish Idrees, Sudhir Kumar, Syed Abdul Arif Rehman, Samudrala Gourinath, Asimul Islam, Faizan Ahmad, Md Imtaiyaz Hassan
Carbonic anhydrase VA (CAVA) is a mitochondrial enzyme that catalyzes the reversible hydration of CO2 to produce HCO3(-) and proton. CAV is primarily involved in several biosynthetic processes such as ureagenesis, gluconeogenesis and lipogenesis by providing bicarbonate ion. Here, we report a new strategy for cloning, expression and purification for CAVA in the bacterial system followed by its biophysical characterization. The cDNA of CAVA, a 801 nucleotide long that encodes a 267-amino acid polypeptide of molecular mass of 30-kDa (excluding signal peptide), was sub-cloned in the expression vector pET21c and transformed into Escherichia coli strain BL21 (DE3) for expression...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329066/impact-of-donor-comorbidities-on-heart-transplant-outcomes-in-the-modern-era
#2
Julien Guihaire, Pierre Emmanuel Noly, Amandine Martin, Mathilde Rojo, Marie Aymami, Anne Ingels, Bernard Lelong, Céline Chabanne, Jean-Philippe Verhoye, Erwan Flécher
OBJECTIVES: The use of marginal donors with cardiovascular risk factors is increasing due to organ shortage but remains controversial in heart transplantation (HTx). We sought to investigate post-transplant outcomes in the recent era taking into account donor characteristics. METHODS: We reviewed 261 HTx performed in our hospital between January 1996 and March 2013. Donor characteristics were obtained from the national database. The incidence of primary graft dysfunction (PGD) and cardiac allograft vasculopathy (CAV) and overall survival were compared in 2 groups of HTx recipients: those receiving transplants from 1996 to 2004 (Group A, n =  120) and from 2005 to 2013 (Group B, n =  141)...
February 20, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28320840/k-channel-kv3-4-is-essential-for-axon-growth-by-limiting-the-influx-of-ca-2-into-growth-cones
#3
Chia-Yi Huang, Cheng-Chang Lien, Chau-Fu Cheng, Ting-Yun Yen, Chieh-Ju Chen, Meei-Ling Tsaur
Membrane excitability in the axonal growth cones of embryonic neurons influences axon growth. Voltage-gated K(+) (Kv) channels are key factors in controlling membrane excitability, but whether they regulate axon growth remains unclear. Here, we report that Kv3.4 is expressed in the axonal growth cones of embryonic spinal commissural neurons, motoneurons, dorsal root ganglion neurons, retinal ganglion cells and callosal projection neurons during axon growth. Our in vitro (cultured dorsal spinal neurons of chick embryos) and in vivo (developing chick spinal commissural axons and rat callosal axons) findings demonstrate that knockdown of Kv3...
March 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28320042/calcium-channel-modulation-as-a-target-in-chronic-pain-control
#4
REVIEW
Ryan Patel, Carlota Montagut-Bordas, Anthony H Dickenson
Neuropathic pain remains poorly treated for large numbers of patients and little progress has been made in developing novel classes of analgesics. To redress this issue, ziconotide (Prialt(TM) ) was developed and approved as a first in class synthetic version of ω-conotoxin MVIIA, a Cav 2.2 peptide blocker. Unfortunately, the impracticalities of intrathecal delivery, low therapeutic index and severe neurological side effects associated with ziconotide has restricted its use to exceptional circumstances. Ziconotide exhibits no state or use dependent block of Cav 2...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28319871/autoantibodies-and-immune-complexes-to-oxidation-specific-epitopes-and-progression-of-aortic-stenosis-results-from-the-astronomer-trial
#5
Romain Capoulade, Kwan L Chan, Patrick Mathieu, Yohan Bossé, Jean G Dumesnil, James W Tam, Koon K Teo, Xiaohong Yang, Joseph L Witztum, Benoit J Arsenault, Jean-Pierre Després, Philippe Pibarot, Sotirios Tsimikas
BACKGROUND AND AIMS: Elevated levels of lipoprotein(a) [Lp(a)] and oxidized phospholipids on apolipoprotein B-100 (OxPL-apoB) predict the progression of pre-existing mild-to-moderate calcific aortic valve stenosis (CAVS). Whether indirect markers of oxidation-specific epitopes (OSE) are also predictive is not known. The association between IgG and IgM autoantibodies and malondialdehyde-modified low density lipoprotein (MDA-LDL) and IgG and IgM apolipoprotein B immune complexes (apoB-IC), and the hemodynamic progression rate of CAVS was determined in the ASTRONOMER (Aortic Stenosis Progression Observation: Measuring Effects of Rosuvastatin, NCT00800800) trial...
March 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28303387/caveolar-remodeling-is-a-critical-mechanotransduction-mechanism-of-the-stretch-induced-l-type-ca-2-channel-activation-in-vascular-myocytes
#6
Sang Woong Park, Kyung Chul Shin, Hyun Ji Park, Soon-Kyu Yoou, Jin-Yeon Park, Young-Sun Kang, Dong Jun Sung, Jae Gon Kim, Seung Hwa Park, BoKyung Kim, Hana Cho, Young Min Bae
Activation of L-type voltage-dependent Ca(2+) channels (VDCCL) by membrane stretch contributes to many biological responses such as myogenic contraction of arteries. However, mechanism for the stretch-induced VDCCL activation is unclear. In this study, we examined the hypothesis that caveolar remodeling and its related signaling cascade contribute to the stretch-induced activation of VDCCL in rat mesenteric arterial smooth muscle cells. The VDCCL currents were recorded with nystatin-perforated or with conventional whole-cell patch-clamp technique...
March 16, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28299825/fingolimod-gilenya-%C3%A2-in-multiple-sclerosis-bradycardia-atrioventricular-blocks-and-mild-effect-on-the-qtc-interval-something-to-do-with-the-l-type-calcium-channel
#7
Sylvie Pilote, Chantale Simard, Benoit Drolet
Cardiac arrhythmias and ECG abnormalities including bradycardia, prolongation of the QT interval and atrioventricular (AV) conduction blocks have been extensively observed with fingolimod, the first marketed oral drug for treating the relapsing-remitting form of multiple sclerosis. The present study was aiming to further elucidate the effects of fingolimod on cardiac electrophysiology at three different levels; 1) in vitro, 2) ex vivo and 3) in vivo. 1) Patch-clamp experiments in whole cell configuration were performed on Cav 1...
March 16, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28295363/angiotensin-ii-activates-cav-1-2-ca-2-channels-through-%C3%AE-arrestin2-and-casein-kinase-2-in-mouse-immature-cardiomyocytes
#8
Toshihide Kashihara, Tsutomu Nakada, Katsuhiko Kojima, Toshikazu Takeshita, Mitsuhiko Yamada
Angiotensin II (AngII), the main effector peptide of the renin-angiotensin system, plays important roles in cardiovascular regulation in the perinatal period. Despite the well-known stimulatory effect of AngII on vascular contraction, little is known about regulation of contraction of the immature heart by AngII. Here we found that AngII significantly increased the peak amplitude of twitch Ca(2+) transients by robustly activating L-type CaV 1.2 Ca(2+) (CaV 1.2) channels in mouse immature but not mature cardiomyocytes...
March 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28295232/cav-1-3-channels-play-a-crucial-role-in-the-formation-of-paroxysmal-depolarization-shifts-in-cultured-hippocampal-neurons
#9
Victoria Stiglbauer, Matej Hotka, Manuel Ruiß, Karlheinz Hilber, Stefan Boehm, Helmut Kubista
OBJECTIVE: An increase of neuronal Cav 1.3 L-type calcium channels (LTCCs) has been observed in various animal models of epilepsy. However, LTCC inhibitors failed in clinical trials of epileptic treatment. There is compelling evidence that paroxysmal depolarization shifts (PDSs) involve Ca(2+) influx through LTCCs. PDSs represent a hallmark of epileptiform activity. In recent years, a probable epileptogenic role for PDSs has been proposed. However, the implication of the two neuronal LTCC isoforms, Cav 1...
March 11, 2017: Epilepsia
https://www.readbyqxmd.com/read/28291255/tir-bb-loop-mimetic-as-1-attenuates-cardiac-ischemia-reperfusion-injury-via-a-caveolae-and-caveolin-3-dependent-mechanism
#10
Yuanping Hu, Meiling Zhang, Xin Shen, Guoliang Dai, Danyang Ren, Linli Que, Tuanzhu Ha, Chuanfu Li, Yong Xu, Wenzheng Ju, Yuehua Li
AS-1, the TIR/BB loop mimetic, plays a protective role in cardiac ischemia/reperfusion (I/R) but the molecular mechanism remains unclear. The muscle specific caveolin3 (Cav-3) and the caveolae have been found to be critical for cardioprotection. This study aimed to evaluate our hypothesis that caveolae and Cav-3 are essential for AS-1-induced cardioprotection against myocardial I/R injury. To address these issues, we analyzed the involvement of Cav-3 in AS-1 mediated cardioprotection both in vivo and in vitro...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28290363/volatile-and-non-volatile-semi-volatile-compounds-and-in-vitro-bioactive-properties-of-chilean-ulmo-eucryphia-cordifolia-cav-honey
#11
Francisca Acevedo, Paulina Torres, B Dave Oomah, Severino Matias de Alencar, Adna Prado Massarioli, Raquel Martín-Venegas, Vicenta Albarral-Ávila, César Burgos-Díaz, Ruth Ferrer, Mónica Rubilar
Ulmo honey originating from Eucryphia cordifolia tree, known locally in the Araucania region as the Ulmo tree is a natural product with valuable nutritional and medicinal qualities. It has been used in the Mapuche culture to treat infections. This study aimed to identify the volatile and non-volatile/semi-volatile compounds of Ulmo honey and elucidate its in vitro biological properties by evaluating its antioxidant, antibacterial, antiproliferative and hemolytic properties and cytotoxicity in Caco-2 cells. Headspace volatiles of Ulmo honey were isolated by solid-phase microextraction (SPME); non-volatiles/semi-volatiles were obtained by removing all saccharides with acidified water and the compounds were identified by GC/MS analysis...
April 2017: Food Research International
https://www.readbyqxmd.com/read/28283950/caveolin-1-in-the-pathogenesis-of-diabetic-nephropathy-potential-therapeutic-target
#12
REVIEW
Richard Van Krieken, Joan C Krepinsky
PURPOSE OF REVIEW: Diabetic nephropathy, a major microvascular complication of diabetes and the most common cause of end-stage renal disease, is characterized by prominent accumulation of extracellular matrix. The membrane microdomains caveolae, and their integral protein caveolin-1, play critical roles in the regulation of signal transduction. In this review we discuss current knowledge of the contribution of caveolin-1/caveolae to profibrotic signaling and the pathogenesis of diabetic kidney disease, and assess its potential as a therapeutic target...
March 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28281696/plectin-is-a-novel-regulator-for-apical-extrusion-of-rasv12-transformed-cells
#13
Ailijiang Kadeer, Takeshi Maruyama, Mihoko Kajita, Tomoko Morita, Ayana Sasaki, Atsuko Ohoka, Susumu Ishikawa, Masaya Ikegawa, Takashi Shimada, Yasuyuki Fujita
Several lines of evidence have revealed that newly emerging transformed cells are often eliminated from the epithelium, though the underlying molecular mechanisms of this cancer preventive phenomenon still remain elusive. In this study, using mammalian cell culture systems we have identified plectin, a versatile cytoskeletal linker protein, as a novel regulator for apical extrusion of RasV12-transformed cells. Plectin is accumulated in RasV12 cells when they are surrounded by normal epithelial cells. Similarly, cytoskeletal proteins tubulin, keratin, and Epithelial Protein Lost In Neoplasm (EPLIN) are also accumulated in the transformed cells surrounded by normal cells...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28278376/stapled-voltage-gated-calcium-channel-cav-%C3%AE-interaction-domain-aid-peptides-act-as-selective-protein-protein-interaction-inhibitors-of-cav-function
#14
Felix Findeisen, Marta Campiglio, Hyunil Jo, Fayal Abderemane-Ali, Christine H Rumpf, Lianne Pope, Nathan D Rossen, Bernhard E Flucher, William F DeGrado, Daniel L Minor
For many voltage-gated ion channels (VGICs) creation of a properly functioning ion channel requires the formation of specific protein protein interactions between the transmembrane pore-forming subunits and cytoplasmic accessory subunits. Despite the importance of such protein-protein interactions in VGIC function and assembly, their potential as sites for VGIC modulator development has been largely overlooked. Here, we develop meta xylyl (m xylyl) stapled peptides that target a prototypic VGIC high affinity protein-protein interaction, the interaction between the voltage-gated calcium channel (CaV) pore forming subunit α interaction domain (AID) and cytoplasmic β subunit (CaVβ)...
March 9, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28266037/extension-of-cavs-coarse-grained-model-to-phospholipid-membranes-the-importance-of-electrostatics
#15
Hujun Shen, Mingsen Deng, Yachao Zhang
It is evident from experiment that electrostatic potential (or dipole potential) is positive inside PC or PE lipid bilayers in the absence of ions. MARTINI coarse-grained (CG) model, which has been widely used in simulating physical properties of lipid bilayers, fails to reproduce the positive value for the dipole potential in the membrane interior. Although the total dipole potential can be correctly described by the BMW/MARTINI model, the contribution from the ester dipoles, playing a nontrivial role in the electrostatic potential across lipid membranes, is neglected by this hybrid approach...
March 7, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28261344/a-nomogram-for-predicting-the-probability-of-recurrence-in-patients-with-carcinomas-located-in-the-ampulla-of-vater
#16
Keng-Hao Liu, Chih-Ho Hsu, Jun-Te Hsu, Chun-Yi Tsai, Yu-Yin Liu, Tsann-Long Hwang, Ta-Sen Yeh, Yu-Shin Hung, Wen-Chi Chou
Background and Objectives: The standard treatment for carcinomas of the ampulla of Vater (CAV) is surgical resection. Nevertheless, recurrence is observed in half of the patients within five years after cancer surgery. In this study, we aimed to identify predictive factors and develop a nomogram capable of predicting the risk of recurrence in post-resection CAV patients. Methods: Our study cohort was composed of two hundred and twelve patients who had undergone radical surgery for CAV between 2000 and 2012...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28260321/-hydroxyfasudi-attenuates-lipopolysaccharide-induced-endothelial-dysfunction-via-suppressing-the-expression-of-rho-associated-coiled-coil-protein-kinase-1-connexin-43-and-caveolin-1
#17
P F Zheng, X H Wu, W Huang, G T Ma, Q Bi
Objective: To investigate the effect and mechanism of hydroxyfasudi (HF), a specific Rho kinase inhibitor, on lipopolysaccharide(LPS)induced endothelial dysfunction. Methods: A total of 24 male Sprague Dawley rats were randomly divided into control group(n=6), HF group(n=6), LPS group(n=6) and LPS + HF group(n=6) with random number table method. There was no special treatment in control group. HF (30 mg/kg) was injected intraperitoneally in HF group. LPS (1 mg/kg) were injected intravenously in LPS group. In LPS+ HF group, HF (30 mg/kg) was injected intraperitoneally, followed by intravenous LPS injection (1 mg/kg) 30 minutes later...
February 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28256585/lrp1-influences-trafficking-of-n-type-calcium-channels-via-interaction-with-the-auxiliary-%C3%AE-2%C3%AE-1-subunit
#18
Ivan Kadurin, Simon W Rothwell, Beatrice Lana, Manuela Nieto-Rostro, Annette C Dolphin
Voltage-gated Ca(2+) (CaV) channels consist of a pore-forming α1 subunit, which determines the main functional and pharmacological attributes of the channel. The CaV1 and CaV2 channels are associated with auxiliary β- and α2δ-subunits. The molecular mechanisms involved in α2δ subunit trafficking, and the effect of α2δ subunits on trafficking calcium channel complexes remain poorly understood. Here we show that α2δ-1 is a ligand for the Low Density Lipoprotein (LDL) Receptor-related Protein-1 (LRP1), a multifunctional receptor which mediates trafficking of cargoes...
March 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28243118/the-different-functions-and-clinical-significances-of-caveolin-1-in-human-adenocarcinoma-and-squamous-cell-carcinoma
#19
REVIEW
Pin Fu, Fuchun Chen, Qi Pan, Xianda Zhao, Chen Zhao, William Chi-Shing Cho, Honglei Chen
Caveolin-1 (Cav-1), a major structural protein of caveolae, is an integral membrane protein which plays an important role in the progression of carcinoma. However, whether Cav-1 acts as a tumor promoter or a tumor suppressor still remains controversial. For example, the tumor-promoting function of Cav-1 has been found in renal cancer, prostate cancer, tongue squamous cell carcinoma (SCC), lung SCC and bladder SCC. In contrast, Cav-1 also plays an inhibitory role in esophagus adenocarcinoma, lung adenocarcinoma and cutaneous SCC...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28240523/prognostic-factors-and-survival-of-patients-with-carcinoma-of-the-ampulla-of-vater-after-pancreaticoduodenectomy
#20
Sunhawit Junrungsee, Ekkapope Kittivarakul, Wasana Ko-iam, Worakitti Lapisatepun, Trichak Sandhu, Anon Chotirosniramit
Background: Although carcinoma of the ampulla of Vater (CAV) is a rare tumor, accounting for just 0.2% of gastrointestinal cancers, the survival of CAV patients is unfavorable. The five-year rates have ranged from 36.8-75.2% in previous reports but there is a lack of data relating to Thai people. Also prognostic factors are controversial. Objectives: This study aimed to determine survival outcomes and to identify prognostic factors for a positive outcome for CAV patients after surgery. Methods: In this retrospective cohort study, data were collected from CAV patients who underwent surgery in Chiang Mai University Hospital from 2005 to 2012 for time to event analysis, the log rank test and univariate and multivariate Cox’s regression analysis...
January 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
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