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Abramavičius S, Volkevičiūtė A, Tunaitytė A, Venslauskas M, Bubulis A, Bajoriūnas V, Stankevičius E. Low-Frequency (20 kHz) Ultrasonic Modulation of Drug Action. ULTRASOUND IN MEDICINE & BIOLOGY 2020; 46:3017-3031. [PMID: 32768323 DOI: 10.1016/j.ultrasmedbio.2020.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 04/27/2020] [Accepted: 07/07/2020] [Indexed: 06/11/2023]
Abstract
We tested the effect of low-frequency ultrasound (LUS, 20 kHz, 4 W/cm2) on the function of rat mesentery and human pulmonary arteries with wire myography. The vessels were induced to contract with either noradrenaline or physiologic saline solution (PSS) with a high potassium concentration (KPSS) and then incubated with capsaicin (2.1 × 10-7 M, TRPV1 [transient receptor potential vanilloid 1] activator), dopamine (1 × 10-4 M, dopamine and α2-receptor activator), or fenoldopam (dopamineA1 receptor agonist, 1 × 10-4 M) with and without glibenclamide (1 μM, KATP [adenosine triphosphate {sensitive potassium channel (ATP)}-sensitive potassium channel] inhibitor and α2-receptor modulator), and insonated. Vessels were incubated in Ca2+-free PSS and induced to contract with added extracellular Ca2+ and noradrenaline. Pulmonary arteries were induced to contract with KPSS and dopamine. Then the vessels were insonated. LUS inhibited the influx of external Ca2+, inhibited the dopamine-induced vasoconstriction in the KPSS (glibenclamide reversible), reduced the capsaicin-induced vasorelaxation, increased the gentamicin-induced vasorelaxation and increased the dopamine-induced contraction in the KPSS in human pulmonary arteries.
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Affiliation(s)
- Silvijus Abramavičius
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Preclinical Drug Investigation, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
| | - Augusta Volkevičiūtė
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Preclinical Drug Investigation, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Agilė Tunaitytė
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Preclinical Drug Investigation, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Mantas Venslauskas
- Institute of Mechatronics, Kaunas University of Technology, Kaunas, Lithuania
| | - Algimantas Bubulis
- Institute of Mechatronics, Kaunas University of Technology, Kaunas, Lithuania
| | - Vytis Bajoriūnas
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Preclinical Drug Investigation, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Edgaras Stankevičius
- Institute of Physiology and Pharmacology, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Preclinical Drug Investigation, Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
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Martínez-Salgado C, López-Hernández FJ, López-Novoa JM. Glomerular nephrotoxicity of aminoglycosides. Toxicol Appl Pharmacol 2007; 223:86-98. [PMID: 17602717 DOI: 10.1016/j.taap.2007.05.004] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2007] [Revised: 04/17/2007] [Accepted: 05/10/2007] [Indexed: 11/23/2022]
Abstract
Aminoglycoside antibiotics are the most commonly used antibiotics worldwide in the treatment of Gram-negative bacterial infections. However, aminoglycosides induce nephrotoxicity in 10-20% of therapeutic courses. Aminoglycoside-induced nephrotoxicity is characterized by slow rises in serum creatinine, tubular necrosis and marked decreases in glomerular filtration rate and in the ultrafiltration coefficient. Regulation of the ultrafiltration coefficient depends on the activity of intraglomerular mesangial cells. The mechanisms responsible for tubular nephrotoxicity of aminoglycosides have been intensively reviewed previously, but glomerular toxicity has received less attention. The purpose of this review is to critically assess the published literature regarding the toxic mechanisms of action of aminoglycosides on renal glomeruli and mesangial cells. The main goal of this review is to provide an actualized and mechanistic vision of pathways involved in glomerular toxic effects of aminoglycosides.
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Affiliation(s)
- Carlos Martínez-Salgado
- Unidad de Investigación, Hospital Universitario de Salamanca, Paseo San Vicente 58-182, 37007 Salamanca, Spain.
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Oztürk Y, Altinkurt O, Yildizoğlu-Ari N, Altan VM. Evaluation of contraction time and recovery period as a parameter in the calcium antagonistic action on the K(+)-depolarized rat duodenum. J Pharm Pharmacol 1990; 42:874-7. [PMID: 1983153 DOI: 10.1111/j.2042-7158.1990.tb07045.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Verapamil, nifedipine, phentolamine, tolazoline, gentamicin and neomycin inhibited calcium-induced contractions of K(+)-depolarized duodenum of rat by shifting the concentration-response curves to the right. Non-competitive inhibitions were observed with trifluoperazine, lidoflazine, procaine and tetracaine. Lanthanum behaved as a partial agonist in this preparation, while nitroprusside was ineffective. Contraction times in the presence of the antagonists and recovery time of the Ca2+ responses after the removal of the antagonists from the bathing medium were evaluated. From the findings, it is suggested that the contraction time and the time required for tissue recovery after removal of a Ca2+ antagonist are parameters making K(+)-depolarized rat duodenum a potential tool for the evaluation of the pharmacological effects of Ca2+ antagonists.
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Affiliation(s)
- Y Oztürk
- Department of Pharmacology, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
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