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https://www.readbyqxmd.com/read/29351498/high-power-diode-laser-on-management-of-drug-induced-gingival-overgrowth-report-of-two-cases-and-long-term-follow-up
#1
Luana Campos, Marina Gallottini, Débora Pallos, Alyne Simões, Fabiana Martins
BACKGROUND: Drug-induced gingival overgrowth (DIGO) is attributed mainly to the prolonged use of calcium channel blocking agents, anticonvulsants, and anti-calcineurin inhibitors . The management of DIGO depends on the severity of the disease and includes surgical intervention and plaque control. Compared to conventional surgical treatment, the recent literature data have shown that gingivectomy using a high-power laser (HPL) is a short and easy procedure, which results in minimal postoperative discomfort and greater patient accep- tance...
January 19, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29351458/differences-in-l-type-calcium-channel-activity-partially-underlie-the-regional-dichotomy-in-pumping-behavior-by-murine-peripheral-and-visceral-lymphatic-vessels
#2
Scott D Zawieja, Jorge A Castorena-Gonzalez, Joshua Scallan, Michael J Davis
We identified a regional dichotomy in murine lymphatic contractile function with regard to vessel location within either the periphery or visceral cavity. All vessels isolated from peripheral regions; cervical, popliteal, inguinal, axillary, and inter-nodal inguinal axillary (Ing-Ax) developed robust contractions with maximal ejection fractions (EFs) of 50-80% in our ex vivo isobaric myograph experiments. Conversely, vessels isolated from the visceral cavity (mesenteric, TD, and iliac) demonstrated maximal EFs below 15%...
January 5, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351409/pharmacological-activation-of-ppar%C3%AE-inhibits-hypoxia-induced-proliferation-through-a-caveolin-1-targeted-and-dependent-mechanism-in-pasmcs
#3
Kai Yang, Mingming Zhao, Junyi Huang, Chenting Zhang, Qiu Yu Zheng, Yuqin Chen, Haiyang Jiang, Wenju Lu, Jian Wang
Previously, we and others have demonstrated that activation of peroxisome proliferator- activated receptor γ (PPARγ) by specific pharmacological agonists inhibits the pathogenesis of chronic hypoxia-induced pulmonary hypertension (CHPH) by suppressing the proliferation and migration in distal pulmonary arterial smooth muscle cells (PASMCs). Moreover, these beneficial effects of PPARγ are mediated by targeting the intracellular calcium homeostasis and store-operated calcium channel (SOCC) proteins, including the main caveolae component caveolin-1...
January 3, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29348160/up-all-night-bk-channels-circadian-dance-with-different-calcium-sources
#4
Caitlin Sedwick
JGP study explores diurnal changes in calcium sources governing BK activity in the SCN.
January 18, 2018: Journal of General Physiology
https://www.readbyqxmd.com/read/29348090/pharmacological-validation-of-the-folkloric-uses-of-cyperus-rotundus-l-in-different-ailments-an-in-vivo-and-in-vitro-research
#5
Musaddique Hussain, Hafiz Muhammad Waqas, Ikhlaq Hussain, Abdul Majeed, Shahid Masood Raza, Khalid Hussain Janbaz
In vivo and in vitro research study was conducted on Cyperus rotundus to evaluate the sound mechanistic background in the treatment of gastrointestinal, bronchial and vascular disorders as well as in pain, emesis, pyrexia and bacterial infections. Results showed that crude extract of Cyperus rotundus (Cr.Cr) exhibited the dose-dependent spasmolytic effect in rabbit jejunum by inhibiting the spontaneous and K+ (80 mM)-induced contractions. Pretreatment of tissue with Cr. Cr caused the rightward shift of calcium concentration response curves, similar to verapamil...
January 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29346439/interspecies-diversity-of-chloride-channel-regulators-calcium-activated-3-genes
#6
Lars Mundhenk, Nancy A Erickson, Nikolai Klymiuk, Achim D Gruber
Members of the chloride channel regulators, calcium-activated (CLCA) family, have been implicated in diverse biomedical conditions, including chronic inflammatory airway diseases such as asthma, chronic obstructive pulmonary disease, and cystic fibrosis, the activation of macrophages, and the growth and metastatic spread of tumor cells. Several observations, however, could not be repeated across species boundaries and increasing evidence suggests that select CLCA genes are particularly prone to dynamic species-specific evolvements...
2018: PloS One
https://www.readbyqxmd.com/read/29344052/manidipine-an-antihypertensive-drug-with-positive-effects-on-metabolic-parameters-and-adrenergic-tone-in-patients-with-diabetes
#7
REVIEW
Margarita SaizSatjes, Francisco Javier Martinez-Martin
Antihypertensive treatment of patients with diabetes should include those drugs with a positive effect on metabolic parameters. Most patients with diabetes require at least two antihypertensive agents. Combining a dihydropyridine calcium channel blocker with a renin-angiotensin-aldosterone system inhibitor is a rational approach. However, not all dihydropyridines are equal with respect to their effects on metabolic parameters. Thus, manidipine exerts a positive effect on insulin resistance. However, this effect has not been observed with amlodipine...
2018: Drugs in Context
https://www.readbyqxmd.com/read/29343813/the-drosophila-gr28bd-product-is-a-non-specific-cation-channel-that-can-be-used-as-a-novel-thermogenetic-tool
#8
Aditi Mishra, Autoosa Salari, Benton R Berigan, Kayla C Miguel, Marzie Amirshenava, Abbey Robinson, Benjamin C Zars, Jenna L Lin, Lorin S Milescu, Mirela Milescu, Troy Zars
Extrinsic control of single neurons and neuronal populations is a powerful approach for understanding how neural circuits function. Adding new thermogenetic tools to existing optogenetic and other forms of intervention will increase the complexity of questions that can be addressed. A good candidate for developing new thermogenetic tools is the Drosophila gustatory receptor family, which has been implicated in high-temperature avoidance behavior. We examined the five members of the Gr28b gene cluster for temperature-dependent properties via three approaches: biophysical characterization in Xenopus oocytes, functional calcium imaging in Drosophila motor neurons, and behavioral assays in adult Drosophila...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343689/a-novel-%C3%AE-conopeptide-eu1-6-inhibits-n-type-cav2-2-calcium-channels-and-exhibits-potent-analgesic-activity
#9
Zhuguo Liu, Peter Bartels, Mahsa Sadeghi, Tianpeng Du, Qing Dai, Cui Zhu, Shuo Yu, Shuo Wang, Mingxin Dong, Ting Sun, Jiabin Guo, Shuangqing Peng, Ling Jiang, David J Adams, Qiuyun Dai
We here describe a novel α-conopeptide, Eu1.6 from Conus eburneus, which exhibits strong anti-nociceptive activity by an unexpected mechanism of action. Unlike other α-conopeptides that largely target nicotinic acetylcholine receptors (nAChRs), Eu1.6 displayed only weak inhibitory activity at the α3β4 and α7 nAChR subtypes and TTX-resistant sodium channels, and no activity at TTX-sensitive sodium channels in rat dorsal root ganglion (DRG) neurons, or opiate receptors, VR1, KCNQ1, L- and T-type calcium channels expressed in HEK293 cells...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342984/amaranthus-caudatus-stimulates-insulin-secretion-in-goto-kakizaki-rats-a-model-of-diabetes-mellitus-type-2
#10
Silvia Zambrana, Lena C E Lundqvist, Virginia Veliz, Sergiu-Bogdan Catrina, Eduardo Gonzales, Claes-Göran Östenson
Diabetes Mellitus Type 2 prevalence is increasing worldwide; thus efforts to develop novel therapeutic strategies are required. Amaranthus caudatus (AC) is a pseudo-cereal with reported anti-diabetic effects that is usually consumed in food preparations in Bolivia. This study evaluated the anti-diabetic nutraceutical property of an AC hydroethanolic extract that contains mainly sugars and traces of polyphenols and amino acids (as shown by nalysis with liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR)), in type 2 diabetic Goto-Kakizaki (GK) rats and healthy Wistar (W) rats...
January 15, 2018: Nutrients
https://www.readbyqxmd.com/read/29342943/the-peptide-pnpp-19-a-spider-toxin-derivative-activates-%C3%AE-opioid-receptors-and-modulates-calcium-channels
#11
Ana C N Freitas, Steve Peigneur, Flávio H P Macedo, José E Menezes-Filho, Paul Millns, Liciane F Medeiros, Maria A Arruda, Jader Cruz, Nicholas D Holliday, Jan Tytgat, Gareth Hathway, Maria E de Lima
The synthetic peptide PnPP-19 comprehends 19 amino acid residues and it represents part of the primary structure of the toxin δ-CNTX-Pn1c (PnTx2-6), isolated from the venom of the spider Phoneutria nigriventer. Behavioural tests suggest that PnPP-19 induces antinociception by activation of CB1, μ and δ opioid receptors. Since the peripheral and central antinociception induced by PnPP-19 involves opioid activation, the aim of this work was to identify whether this synthetic peptide could directly activate opioid receptors and investigate the subtype selectivity for μ-, δ- and/or κ-opioid receptors...
January 15, 2018: Toxins
https://www.readbyqxmd.com/read/29341826/mu-opioid-receptors-inhibit-the-exercise-pressor-reflex-by-closing-n-type-calcium-channels-but-not-by-opening-girk-channels-in-rats
#12
Juan A Estrada, Marc P Kaufman
Mu opioid G-protein coupled receptors (MOR) interact with ion channels to decrease neuronal excitability. In humans, intrathecal administration of the MOR agonist, fentanyl, inhibits the exercise pressor reflex, an effect that can be attributed to either the opening of inward rectifying potassium channels (GIRK) or the closing of N-type calcium channels. The purpose of this study was to determine if the highly selective MOR agonist DAMGO attenuates the exercise pressor reflex, and which of these two channels are responsible for this effect...
January 17, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29339804/ephb6-and-testosterone-in-concert-regulate-epinephrine-release-by-adrenal-gland-chromaffin-cells
#13
Yujia Wang, Wei Shi, Alexandre Blanchette, Junzheng Peng, Shijie Qi, Hongyu Luo, Jonathan Ledoux, Jiangping Wu
Erythropoietin-producing human hepatocellular receptor (EPH) B6 (EPHB6) is a member of the receptor tyrosine kinase family. We previously demonstrated that EPHB6 knockout reduces catecholamine secretion in male but not female mice, and castration reverses this phenotype. We showed here that male EPHB6 knockout adrenal gland chromaffin cells presented reduced acetylcholine-triggered Ca2+ influx. Such reduction depended on the non-genomic effect of testosterone. Increased large conductance calcium-activated potassium channel current densities were recorded in adrenal gland chromaffin cells from male EPHB6 knockout mice but not from castrated knockout or female knockout mice...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339688/choice-of-treatment-based-on-turkish-hypertension-consensus-report-do-we-follow-the-recommendations
#14
Gülden Yürüyen, İlkim Deniz Toprak, Zeki Toprak, Murat Akarsu, Pınar Demir, Yücel Arman, Eylem Özgün Çil, Mustafa Özcan, Sedat Irmak, Özgür Altun, Şengül Aydın Yoldemir, Hasan Eruzun, Tufan Tükek
OBJECTIVE: The aim of this study was to determine how often the recommendations of the Turkish Hypertension Consensus Report are followed, and to draw attention to the report. METHODS: The demographic information of 1000 patients diagnosed with hypertension and the details of the antihypertensive medications prescribed at the outpatient service of a tertiary care hospital were recorded, and the data were compared with the recommendations of the report. RESULTS: The mean age of the patients was 62±11 years...
January 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29339150/altered-function-of-neuronal-l-type-calcium-channels-in-ageing-and-neuroinflammation-implications-in-age-related-synaptic-dysfunction-and-cognitive-decline
#15
REVIEW
Sheeja Navakkode, Chao Liu, Tuck Wah Soong
The rapid developments in science have led to an increase in human life expectancy and thus, ageing and age-related disorders/diseases have become one of the greatest concerns in the 21st century. Cognitive abilities tend to decline as we get older. This age-related cognitive decline is mainly attributed to aberrant changes in synaptic plasticity and neuronal connections. Recent studies show that alterations in Ca2+ homeostasis underlie the increased vulnerability of neurons to age-related processes like cognitive decline and synaptic dysfunctions...
January 12, 2018: Ageing Research Reviews
https://www.readbyqxmd.com/read/29339106/safinamide-a-new-hope-for-parkinson-s-disease
#16
REVIEW
Fábio G Teixeira, Miguel F Gago, Paulo Marques, Pedro Silva Moreira, Ricardo Magalhães, Nuno Sousa, António J Salgado
The loss of dopaminergic neurons (DAn) and reduced dopamine (DA) production underlies the reasoning behind the gold standard treatment for Parkinson's disease (PD) using levodopa (L-DOPA). Recently licensed by the European Medicine Agency (EMA) and US Food and Drug Administration (FDA), safinamide [a monoamine oxidase B (MOA-B) inhibitor] is an alternative to L-DOPA; as we discuss here, it enhances dopaminergic transmission with decreased secondary effects compared with L-DOPA. In addition, nondopaminergic actions (neuroprotective effects) have been reported, with safinamide inhibiting glutamate release and sodium/calcium channels, reducing the excitotoxic input to dopaminergic neuronal death...
January 12, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29338087/thrombospondin-4-acts-on-pre-synaptic-calcium-channel-alpha-2-delta-1-subunit-to-induce-synaptogenesis-between-sensory-and-spinal-cord-neurons-through-a-t-type-calcium-channel-dependent-pathway-that-is-blocked-by-early-low-dose-gabapentin-treatments
#17
Yanhui Peter Yu, Nian Gong, Tae Dong Kweon, Benjamin Vo, Z David Luo
BACKGROUND AND PURPOSE: Nerve injury induces concurrent upregulation of calcium channel alpha-2-delta-1 subunit (Cav α2 δ1 ) and extracellular matrix protein thrombospondin-4 (TSP4) in dorsal root ganglia and dorsal spinal cord, leading to neuropathic pain state development. Interactions of these proteins promote aberrant excitatory synaptogenesis that contributes to neuropathic pain state development through unknown mechanisms. We investigated the contributory role of Cav α2 δ1 /TSP4 to synaptogenesis, and pathway involved in vitro, and whether gabapentin could block this process and pain development in vivo...
January 16, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29338006/a-model-for-cooperative-gating-of-l-type-ca2-channels-and-its-effects-on-cardiac-alternans-dynamics
#18
Daisuke Sato, Rose E Dixon, Luis F Santana, Manuel F Navedo
In ventricular myocytes, membrane depolarization during the action potential (AP) causes synchronous activation of multiple L-type CaV1.2 channels (LTCCs), which trigger the release of calcium (Ca2+) from the sarcoplasmic reticulum (SR). This results in an increase in intracellular Ca2+ (Cai) that initiates contraction. During pulsus alternans, cardiac contraction is unstable, going from weak to strong in successive beats despite a constant heart rate. These cardiac alternans can be caused by the instability of membrane potential (Vm) due to steep AP duration (APD) restitution (Vm-driven alternans), instability of Cai cycling (Ca2+-driven alternans), or both, and may be modulated by functional coupling between clustered CaV1...
January 16, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29337218/calcium-dependent-disorder-to-order-transitions-are-central-to-the-secretion-and-folding-of-the-cyaa-toxin-of-bordetella-pertussis-the-causative-agent-of-whooping-cough
#19
Darragh P O'Brien, Ana Cristina Sotomayor Perez, Johanna Karst, Sara E Cannella, Véronique Yvette Ntsogo Enguéné, Audrey Hessel, Dorothée Raoux-Barbot, Alexis Voegele, Orso Subrini, Marilyne Davi, J Inaki Guijarro, Bertrand Raynal, Bruno Baron, Patrick England, Belen Hernandez, Mahmoud Ghomi, Véronique Hourdel, Christian Malosse, Julia Chamot-Rooke, Patrice Vachette, Dominique Durand, Sébastien Brier, Daniel Ladant, Alexandre Chenal
The adenylate cyclase toxin (CyaA) plays an essential role in the early stages of respiratory tract colonization by Bordetella pertussis, the causative agent of whooping cough. Once secreted, CyaA invades eukaryotic cells, leading to cell death. The cell intoxication process involves a unique mechanism of translocation of the CyaA catalytic domain directly across the plasma membrane of the target cell. Herein, we review our recent results describing how calcium is involved in several steps of this intoxication process...
January 11, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29336990/failure-of-intracardiac-pacing-after-fatal-propafenone-overdose-a-case-report
#20
Ivan Zeljković, Nikola Bulj, Matea Kolačević, Vedran Čabrilo, Diana Delić Brkljačić, Šime Manola
BACKGROUND: Propafenone is a sodium-channel blocker, class IC antiarrhythmic drug, frequently used to manage supraventricular dysrhythmias, especially atrial fibrillation. We report a self mono-intoxication with propafenone. CASE REPORT: A 68-year-old woman presented with a decreased level of consciousness, hypotension, and electrocardiogram showing QRS widening with atrial asystole and extreme bradycardia < 20 beats/min. After initial stabilization with transcutaneous pacing, laboratory findings detected normal electrolyte ranges and metabolic acidosis, and her medical history revealed availability of propafenone due to paroxysmal atrial fibrillation and depressive syndrome, which led to the suspicion of intoxication...
January 11, 2018: Journal of Emergency Medicine
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