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Mitrokhin VM, Kamkina OV, Kamkin AG, Rodina AS, Zolotareva AD, Zolotarev VI, Kazansky VE, Gorbacheva LR, Bilichenko AS, Shileiko SA, Mladenov MI. Simulated Microgravity and Hypergravity Affect the Expression Level of Soluble Guanylate Cyclase, Adenylate Cyclase, and Phosphodiesterase Genesin Rat Ventricular Cardiomyocytes. Bull Exp Biol Med 2024; 176:359-362. [PMID: 38342810 DOI: 10.1007/s10517-024-06024-z] [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: 07/18/2023] [Indexed: 02/13/2024]
Abstract
Ion channels activity is regulated through soluble guanylate cyclase (sGC) and adenylate cyclase (AC) pathways, while phosphodiesterases (PDE) control the intracellular levels of cAMP and cGMP. Here we applied RNA transcriptome sequencing to study changes in the gene expression of the sGC, AC, and PDE isoforms in isolated rat ventricular cardiomyocytes under conditions of microgravity and hypergravity. Our results demonstrate that microgravity reduces the expression of sGC isoform genes, while hypergravity increases their expression. For a subset of AC isoforms, gene expression either increased or decreased under both microgravity and hypergravity conditions. The expression of genes encoding 10 PDE isoforms decreased under microgravity, but increased under hypergravity. However, under both microgravity and hypergravity, the gene expression increased for 7 PDE isoforms and decreased for 3 PDE isoforms. Overall, our findings indicate specific gravity-dependent changes in the expression of genes of isoforms associated with the studied enzymes.
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Affiliation(s)
- V M Mitrokhin
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - O V Kamkina
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A G Kamkin
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - A S Rodina
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A D Zolotareva
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V I Zolotarev
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V E Kazansky
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - L R Gorbacheva
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A S Bilichenko
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - S A Shileiko
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - M I Mladenov
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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Kamkin AG, Kamkina OV, Kazansky VE, Mitrokhin VM, Bilichenko A, Nasedkina EA, Shileiko SA, Rodina AS, Zolotareva AD, Zolotarev VI, Sutyagin PV, Mladenov MI. Identification of RNA reads encoding different channels in isolated rat ventricular myocytes and the effect of cell stretching on L-type Ca 2+current. Biol Direct 2023; 18:70. [PMID: 37899484 PMCID: PMC10614344 DOI: 10.1186/s13062-023-00427-0] [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: 06/19/2023] [Accepted: 10/13/2023] [Indexed: 10/31/2023] Open
Abstract
BACKGROUND The study aimed to identify transcripts of specific ion channels in rat ventricular cardiomyocytes and determine their potential role in the regulation of ionic currents in response to mechanical stimulation. The gene expression levels of various ion channels in freshly isolated rat ventricular cardiomyocytes were investigated using the RNA-seq technique. We also measured changes in current through CaV1.2 channels under cell stretching using the whole-cell patch-clamp method. RESULTS Among channels that showed mechanosensitivity, significant amounts of TRPM7, TRPC1, and TRPM4 transcripts were found. We suppose that the recorded L-type Ca2+ current is probably expressed through CaV1.2. Furthermore, stretching cells by 6, 8, and 10 μm, which increases ISAC through the TRPM7, TRPC1, and TRPM4 channels, also decreased ICa,L through the CaV1.2 channels in K+ in/K+ out, Cs+ in/K+ out, K+ in/Cs+ out, and Cs+ in/Cs+ out solutions. The application of a nonspecific ISAC blocker, Gd3+, during cell stretching eliminated ISAC through nonselective cation channels and ICa,L through CaV1.2 channels. Since the response to Gd3+ was maintained in Cs+ in/Cs+ out solutions, we suggest that voltage-gated CaV1.2 channels in the ventricular myocytes of adult rats also exhibit mechanosensitive properties. CONCLUSIONS Our findings suggest that TRPM7, TRPC1, and TRPM4 channels represent stretch-activated nonselective cation channels in rat ventricular myocytes. Probably the CaV1.2 channels in these cells exhibit mechanosensitive properties. Our results provide insight into the molecular mechanisms underlying stretch-induced responses in rat ventricular myocytes, which may have implications for understanding cardiac physiology and pathophysiology.
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Affiliation(s)
- Andre G Kamkin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Olga V Kamkina
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Viktor E Kazansky
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Vadim M Mitrokhin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Andrey Bilichenko
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Elizaveta A Nasedkina
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Stanislav A Shileiko
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Anastasia S Rodina
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Alexandra D Zolotareva
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Valentin I Zolotarev
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Pavel V Sutyagin
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Mitko I Mladenov
- Department of Physiology, Pirogov Russian National Research Medical University, Moscow, Russian Federation.
- Faculty of Natural Sciences and Mathematics, Institute of Biology, "Ss. Cyril and Methodius" University, Skopje, North, Macedonia.
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Kamkin AG, Mitrokhin VM, Kamkina OV, Kazansky VE, Rodina AS, Zolotareva AD, Zolotarev VI, Sutyagin PV, Mladenov MI, Shenkman BS, Kalashnikov VE, Orlov OI. Simulated Microgravity Changes the Number of Mechanically Gated and Mechanosensitive Ion Channels Genes Transcripts in Rat Ventricular Cardiomyocytes. DOKL BIOCHEM BIOPHYS 2023; 512:251-255. [PMID: 38093125 DOI: 10.1134/s1607672923700369] [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: 05/25/2023] [Revised: 06/03/2023] [Accepted: 06/05/2023] [Indexed: 12/18/2023]
Abstract
The mechanoelectrical feedback in the heart is based on the work of mechanically gated (MGCs) and mechanosensitive (MSCs) channels. Since microgravity alters the heart's morphological and physiological properties, we hypothesized that the expression of both MGCs and MSCs would be affected. We employed RNA transcriptome sequencing to investigate changes in the gene transcript levels of MGCs and MSCs in isolated rat ventricular cardiomyocytes under control conditions and in a simulated microgravity environment. For the first time, our findings demonstrated that simulated microgravity induces alterations in the gene transcript levels of specific MGCs, such as TRPM7, TRPV2, TRPP1, TRPP2, Piezo1, TMEM63A, TMEM36B, and known MSCs, including K2P2.1, K2P3.1, Kir6.1, Kir6.2, NaV1.5, CaV1.2, KV7.1. However, other voltage-gated channels and channels lacking a voltage sensor remained unaffected. These findings suggest that the altered expression of MGCs and MSCs could lead to changes in the net currents across the membrane, ultimately impacting the heart's function.
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Affiliation(s)
- A G Kamkin
- Pirogov Russian National Research Medical University, Moscow, Russia.
| | - V M Mitrokhin
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - O V Kamkina
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - V E Kazansky
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - A S Rodina
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - A D Zolotareva
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - V I Zolotarev
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - P V Sutyagin
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - M I Mladenov
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - B S Shenkman
- State Scientific Center of Russian Federation Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
| | - V E Kalashnikov
- State Scientific Center of Russian Federation Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
| | - O I Orlov
- State Scientific Center of Russian Federation Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
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Kamkin AG, Mitrokhin VM, Kamkina OV, Kazansky VE, Bilichenko AS, Rodina AS, Zolotareva AD, Zolotarev VI, Sutyagin PV, Mladenov MI. Hypergravity Increases the Number of Gene Transcripts of Mechanically Gated and Mechanosensitive Ion Channels in Rat Ventricular Cardiomyocytes. Bull Exp Biol Med 2023; 175:730-733. [PMID: 37979024 DOI: 10.1007/s10517-023-05955-3] [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: 05/11/2023] [Indexed: 11/19/2023]
Abstract
Since hypergravity changes the morphological and physiological properties of the heart, it was assumed that the expression of ion channels that respond to cell stretching or compressing, mechanically gated channels (MGC) and mechanosensitive channels (MSC), would be affected. Using RNA transcriptome sequencing, the change in the number of transcripts for MGC and MSC genes was studied in isolated rat ventricular cardiomyocytes under 4g hypergravity for 5 days. It was shown for the first time that hypergravity induces changes in the number of transcripts of MGC genes: an increase for TRPC1, TRPC3, TRPM7, TRPP1 (PKD1), TRPP2 (PKD2), TMEM63A, TMEM63B, but a decrease for TRPV2, Piezo1, Piezo2. The number of MSC gene transcripts increases: TREK-1, Kir6.2, Nav1.5, Cav1.2, Cav1.3, Kv7.1, and Kv1.2. This potentially leads to an increase in the expression of MGC and MSC proteins leading to an increase in the net current and, as a result, pathological changes in the heart function.
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Affiliation(s)
- A G Kamkin
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - V M Mitrokhin
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - O V Kamkina
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V E Kazansky
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A S Bilichenko
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A S Rodina
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A D Zolotareva
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V I Zolotarev
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - P V Sutyagin
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - M I Mladenov
- Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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Kamkin AG, Kamkina OV, Shim AL, Bilichenko A, Mitrokhin VM, Kazansky VE, Filatova TS, Abramochkin D, Mladenov MI. The role of activation of two different sGC binding sites by NO-dependent and NO-independent mechanisms in the regulation of SACs in rat ventricular cardiomyocytes. Physiol Rep 2022; 10:e15246. [PMID: 35384354 PMCID: PMC8981922 DOI: 10.14814/phy2.15246] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 08/26/2021] [Revised: 03/09/2022] [Accepted: 03/09/2022] [Indexed: 04/18/2023] Open
Abstract
The mechanoelectrical feedback (MEF) mechanism in the heart that plays a significant role in the occurrence of arrhythmias, involves cation flux through cation nonselective stretch-activated channels (SACs). It is well known that nitric oxide (NO) can act as a regulator of MEF. Here we addressed the possibility of SAC's regulation along NO-dependent and NO-independent pathways, as well as the possibility of S-nitrosylation of SACs. In freshly isolated rat ventricular cardiomyocytes, using the patch-clamp method in whole-cell configuration, inward nonselective stretch-activated cation current ISAC was recorded through SACs, which occurs during dosed cell stretching. NO donor SNAP, α1-subunit of sGC activator BAY41-2272, sGC blocker ODQ, PKG blocker KT5823, PKG activator 8Br-cGMP, and S-nitrosylation blocker ascorbic acid, were employed. We concluded that the physiological concentration of NO in the cell is a necessary condition for the functioning of SACs. An increase in NO due to SNAP in an unstretched cell causes the appearance of a Gd3+ -sensitive nonselective cation current, an analog of ISAC , while in a stretched cell it eliminates ISAC . The NO-independent pathway of sGC activation of α subunit, triggered by BAY41-2272, is also important for the regulation of SACs. Since S-nitrosylation inhibitor completely abolishes ISAC , this mechanism occurs. The application of BAY41-2272 cannot induce ISAC in a nonstretched cell; however, the addition of SNAP on its background activates SACs, rather due to S-nitrosylation. ODQ eliminates ISAC , but SNAP added on the background of stretch increases ISAC in addition to ODQ. This may be a result of the lack of NO as a result of inhibition of NOS by metabolically modified ODQ. KT5823 reduces PKG activity and reduces SACs phosphorylation, leading to an increase in ISAC . 8Br-cGMP reduces ISAC by activating PKG and its phosphorylation. These results demonstrate a significant contribution of S-nitrosylation to the regulation of SACs.
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Affiliation(s)
- Andre G. Kamkin
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Olga V. Kamkina
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Andrey L. Shim
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Andrey Bilichenko
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Vadim M. Mitrokhin
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Viktor E. Kazansky
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
| | - Tatiana S. Filatova
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
- Department of Human and Animal PhysiologyLomonosov Moscow State UniversityMoscowRussia
| | - Denis V. Abramochkin
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
- Department of Human and Animal PhysiologyLomonosov Moscow State UniversityMoscowRussia
| | - Mitko I. Mladenov
- Department of PhysiologyPirogov Russian National Research Medical UniversityMoscowRussia
- Faculty of Natural Sciences and MathematicsInstitute of Biology, “Ss. Cyril and Methodius” UniversitySkopjeMacedonia
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Shim AL, Kamkin AG, Kamkina OV, Kazanskii VE, Mitrokhin VM, Bilichenko AS, Filatova TS, Abramochkin DV. Gadolinium as an Inhibitor of Ionic Currents in Isolated Rat Ventricular Cardiomyocytes. Bull Exp Biol Med 2019; 168:187-192. [PMID: 31776956 DOI: 10.1007/s10517-019-04672-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Indexed: 11/30/2022]
Abstract
The whole-cell patch-clamp technique was used to examine the effect of gadolinium Gd3+ (a non-specific blocker of mechanically gated current IMGCh, a component of late current IL) on ionic currents in insolated rat ventricular cardiomyocytes alone and in combination with the blockers of L-type calcium currents (ICaL) nifedipine (10 μM) or verapamil (1 μM). In K+in/K+out or Cs+in/Cs+out media, blockade of ICaL produced no effect on IL at negative potentials, but inhibited IL at positive ones. In K+in/K+out medium, Gd3+ (5 μM) decreased the net persistent current (Inp) at -45 mV from 198.6±6.4 to 96.7±9.5 pA over 15 min. Gd3+ alone or in combination with ICaL blockers shifted the reversal potential of IL to more negative values. At negative potentials, Gd3+ decreased IK1 and inward current including IMGCh. At positive potentials, Gd3+ alone or in combination with ICaL blockers decreased IL. When applied for 15 min in Cs+in/Cs+out medium at -45 mV, Gd3+ produced no effect on net current and inward and outward components of IL. Thus, Gd3+ can be viewed as a specific blocker of IMGCh only in Cs+ medium.
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Affiliation(s)
- A L Shim
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A G Kamkin
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - O V Kamkina
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V E Kazanskii
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - V M Mitrokhin
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - A S Bilichenko
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - T S Filatova
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia.,Faculty of Biology, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - D V Abramochkin
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia.,Faculty of Biology, M. V. Lomonosov Moscow State University, Moscow, Russia
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7
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Vlasov AP, Kamkina OV, Trofimov VA, Vlasova TI, Abramova SV, Bolotskikh VA. Metabolic Restructuring in the Liver under Conditions of Endogenous Intoxication. Bull Exp Biol Med 2017; 163:317-320. [PMID: 28744654 DOI: 10.1007/s10517-017-3793-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 11/25/2022]
Abstract
Significant metabolic alterations in the liver were observed in dogs with modeled acute peritonitis. These changes significantly impaired detoxification function of the liver, which was seen from the increase in the titer of toxic products in the early post-surgery period not only in the lymph, but also in the blood plasma. The key pathogenic mechanism leading to acute liver failure is destabilization of cell membrane resulting from LPO, phospholipase activity, and tissue hypoxia. Activation of LPO and increase in phospholipase activity in the liver tissues were observed within 12 h after peritonitis modeling.
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Affiliation(s)
- A P Vlasov
- N. P. Oared Mordovian State University, Saransk, Republic of Mordovia, Russia.
| | - O V Kamkina
- N. I. Pirogov Russian National Research Medical University, Ministry of the Health of the Russian Federation, Moscow, Russia
| | - V A Trofimov
- N. P. Oared Mordovian State University, Saransk, Republic of Mordovia, Russia
| | - T I Vlasova
- N. P. Oared Mordovian State University, Saransk, Republic of Mordovia, Russia
| | - S V Abramova
- N. P. Oared Mordovian State University, Saransk, Republic of Mordovia, Russia
| | - V A Bolotskikh
- N. N. Burdenko Voronezh State Medical Academy, Voronezh, Russia
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D'yakonova IN, Kamkina OV, Rakhmanova IV, Ishanova YS, Burmistrova DS. Effect of Successive Administration of Vancomycin and Amikacin on Auditory Function of Immature Animals. Bull Exp Biol Med 2017; 162:458-461. [PMID: 28243909 DOI: 10.1007/s10517-017-3639-8] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/30/2022]
Abstract
Effect of successive administration vancomycin and amikacin in therapeutic doses on immature auditory organ was compared to single administration of the same drugs in chronic experiments on immature rabbits by recording of short-latency auditory brainstem response (ABR) and distortion product otoacoustic emission (DPOAE). Drug administration always increased significantly the ABR peak I threshold. Ototoxic antibiotics did not change DPOAE, but selectively affected activity of outer hair cells. No enhancement of the ototoxic effects was observed after successive administration of the two antibiotics.
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Affiliation(s)
- I N D'yakonova
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russian Federation, Moscow, Russia
| | - O V Kamkina
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russian Federation, Moscow, Russia
| | - I V Rakhmanova
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russian Federation, Moscow, Russia
| | - Yu S Ishanova
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russian Federation, Moscow, Russia
| | - D S Burmistrova
- N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russian Federation, Moscow, Russia.
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Albegova DZ, Kamkina OV, Pavlova SI, Albegova ZK, Laptev OS, Kozlov IG. Antiproliferative Effects of Modified Bioflavonoid in Ex Vivo Model. Bull Exp Biol Med 2016; 161:381-3. [PMID: 27496028 DOI: 10.1007/s10517-016-3419-x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 11/28/2022]
Abstract
We studied the effect of modified bioflavonoid and reference drug quercetin dihydrate on proliferation of mononuclears triggered by T- and B-cell mitogens. Lymphocytes were in vivo pretreated with the examined agents followed by their explantation and in vitro activation with T- and B-cell mitogens in cell culture. Intraperitoneal injection of modified bioflavonoid and quercetin dihydrate produced a dose-dependent inhibition of proliferation of the in vitroactivated splenocytes; modified bioflavonoid demonstrated higher antiproliferative activity.
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Affiliation(s)
- D Z Albegova
- Department of Pharmacology, N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - O V Kamkina
- Department of Pharmacology, N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - S I Pavlova
- N. I. Ul'yanov Chuvash State University, Cheboksary, Chuvash Republic, Russia
| | - Zh K Albegova
- North Ossetian State Medical Academy, Ministry of Health of Russia, Vladikavkaz, The Republic of North Ossetia-Alania, Russia.
| | - O S Laptev
- Department of Pharmacology, N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
| | - I G Kozlov
- Department of Pharmacology, N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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Poryadin GV, Vlasov AP, Trofimov VA, Vlasova TI, Kamkina OV, Grigoryev AG, Vlasov PA. [Hemoglobin oxygen transport capacity in surgical endotoxicosis ]. Patol Fiziol Eksp Ter 2016; 60:23-27. [PMID: 29215240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In surgical endointoxication hemoglobin oxygen transport capacity of red blood cells (hemoglobin affinity ligands: the ability to bind and release ligands) is reduced and is associated with the severity of endogenous intoxication. Violation of oxygen transport function of hemoglobin at endogenous intoxication is associated with conformational changes of a biomolecule, and its possible influence on reactive oxygen species, which confirmed in experiments in vitro: under the influence of oxygen-iron ascorbate ability of hemoglobin deteriorates. Largely similar structural and functional changes in hemoglobin occur in patients with surgical endotoxicosis.
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D'yakonova IN, Kamkina OV, Ishanova YS, Rakhmanova IV, Burmistrova DS. Auditory Function in Immature Animals after Two Consecutive Courses of Ototoxic Antibiotics. Bull Exp Biol Med 2015; 159:415-9. [PMID: 26385408 DOI: 10.1007/s10517-015-2979-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Indexed: 11/25/2022]
Abstract
In chronic experiments on immature rabbits receiving therapeutic courses of vancomycin, gentamicin, and consecutive administration of vancomicin and gentamicin by the scheme used in neonatology, hearing function was evaluated by the methods of auditory evoked potentials (auditory brainstem response, ABR) and distortion product otoacoustic emission (DPOAE). Comparison with the control group revealed ototoxic effects of all studied antibiotics that manifested in increased sound tolerance and more rapid shortening of latencies in 30-100 dB range. Higher thresholds were found only after gentamicin administration. Vancomycin administration significantly reduced the responses at 4 kHz. Subsequent gentamicin course did not potentiate this effect.
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Affiliation(s)
- I N D'yakonova
- Department of Physiology, Medico-Biological Faculty, Moscow, Russia
| | | | - Yu S Ishanova
- Research Laboratory of Clinical and Experimental Pediatric Otorhinolaryngology, Moscow, Russia.
| | - I V Rakhmanova
- Research Laboratory of Clinical and Experimental Pediatric Otorhinolaryngology, Moscow, Russia
| | - D S Burmistrova
- Department of Pediatric Otorhinolaryngology, N. I. Pirogov Russian National Research Medical University, Ministry of Health of the Russian Federation, Moscow, Russia
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