76
|
Sidorov GV, Myasoedov NF. Synthesis of tritium-labelled biologically important diazines. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1999v068n03abeh000471] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
77
|
Shevchenko VP, Nagaev IY, Myasoedov NF. Solid-phase method for tritium labelling of biologically active compounds. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc2003v072n05abeh000781] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
78
|
Knyazev DA, Zel'venskii YD, Myasoedov NF, Filippov GG. Methods of Measurement of Small Separation Coefficients. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1969v038n07abeh001762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
79
|
Dubynin VA, Ivleva YA, Stovolosov IS, Belyaeva YA, Dobryakova YV, Andreeva LA, Alfeeva LY, Kamenskii AA, Myasoedov NF. Effect of beta-casomorphines on mother-oriented ("child's") behavior of white rats. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2007; 412:1-4. [PMID: 17515027 DOI: 10.1134/s0012496607010012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
80
|
Agapova TY, Agniullin YV, Shadrina MI, Shram SI, Slominsky PA, Lymborska SA, Myasoedov NF. Neurotrophin gene expression in rat brain under the action of Semax, an analogue of ACTH4–10. Neurosci Lett 2007; 417:201-5. [PMID: 17353092 DOI: 10.1016/j.neulet.2007.02.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2006] [Revised: 02/01/2007] [Accepted: 02/14/2007] [Indexed: 11/17/2022]
Abstract
The heptapeptide Semax, an analogue of the N-terminal adrenocorticotropic hormone fragment (4-10) (ACTH(4-10)), has been shown to exert a number of neuroprotective effects. There are some investigations that connected these effects with the increase of neurotrophin gene expression under the peptide drug application in neuron cell cultures [M.I. Shadrina, O.V. Dolotov, I.A. Grivennikov, P.A. Slominsky, L.A. Andreeva, L.S. Inozemtseva, S.A. Limborska, N.F. Myasoedov, Rapid induction of neurotrophin mRNAs in rat glial cell cultures by Semax, an adrenocorticotropic hormone analogue, Neurosci. Lett. 308 (2001) (2) 115-118]. In this work, we examined the action of Semax on rapid changes of nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) gene expression in vivo. Male Wistar rats were treated for 1h with Semax (50 microg/kg, single intranasal application) and neurotrophin gene expression in rat brain was analyzed by real-time polymerase chain reaction (PCR). It was revealed that an intranasal application of Semax increased the expression of both neurotrophin genes in rat hippocampus. Bdnf gene expression also increased in the brainstem and cerebellum. Ngf gene expression decreased in rat frontal cortex. Thus, Semax induces rapid, gene- and region-specific changes in neurotrophin gene expression in normal rat brain.
Collapse
|
81
|
Bochkareva NV, Kondakova IV, Kolomiets LA, Muntyan AB, Shevchenko VP, Nagaev IY, Shevchenko KV, Myasoedov NF, Dorofeeva NN. Synthesis of highly tritium labeled steroids for evaluation of aromatase and steroidsulfatase activities in endometrial tumors. Bull Exp Biol Med 2007; 142:478-80. [PMID: 17415442 DOI: 10.1007/s10517-006-0397-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Data on activities of estrogen-synthesis enzymes (aromatase and steroidsulfatase) in endometrial tumors were obtained by sensitive and highly precise radioisotope methods. The results clear out some pathogenetic aspects in the development and progress of malignant tumors in the endometrium.
Collapse
|
82
|
Meshavkin VK, Kost NV, Sokolov OY, Zolotarev YA, Myasoedov NF, Zozulya AA. Naloxone-blocked depriming effect of anxiolytic selank on apomorphine-induced behavioral manifestations of hyperfunction of dopamine system. Bull Exp Biol Med 2007; 142:598-600. [PMID: 17415472 DOI: 10.1007/s10517-006-0428-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Peptide anxiolytic selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) applied intraperitoneally in doses of 0.01, 0.1, 1.0, and 10.0 mg/kg to mice reduces behavioral manifestations of dopaminergic system induced by apomorphine in the verticalization test. This effect was comparable to that of atypical antipsychotic olanzapine in near-therapeutic doses (0.1 and 1.0 mg/kg, intraperitoneally) and was blocked with nonselective opioid receptor antagonist naloxone (10 mg/kg, intraperitoneally). Radioreceptor assay showed that selank did not displace nonselective D2-dopamine receptor antagonist (3)H-spiperone (EC50>100 microM) and delta- and micro-opioid receptor ligand 3H-DADLE (EC50>40 microM) from specific binding sites on rat brain membranes. It is hypothesized that the revealed behavioral effect of selank is mediated by its modulating effect on the endogenous opioid system and specifically, by its effect on activity of enkephalin-degrading enzymes.
Collapse
|
83
|
Zolotarev YA, Dadayan AK, Kozik VS, Ziganshin RH, Vaskovsky BV, Myasoedov NF. Solid state isotopic exchange of hydrogen in proteins and peptides. J Labelled Comp Radiopharm 2007. [DOI: 10.1002/jlcr.1212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
84
|
Romanova GA, Silachev DN, Shakova FM, Kvashennikova YN, Viktorov IV, Shram SI, Myasoedov NF. Neuroprotective and antiamnesic effects of Semax during experimental ischemic infarction of the cerebral cortex. Bull Exp Biol Med 2006; 142:663-6. [PMID: 17603664 DOI: 10.1007/s10517-006-0445-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Semax had a pronounced neuroprotective and antiamnesic effect during focal photoinduced ischemia of the prefrontal cortex. Intranasal administration of Semax for 6 days decreased the volume of cortical infarction and improved retention and performance of conditioned passive avoidance response.
Collapse
|
85
|
V'yunova TV, Shevchenko KV, Shevchenko VP, Bobrov MY, Bezuglov VV, Myasoedov NF. Specific binding of semax in different regions of the rat brain. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2006; 410:376-7. [PMID: 17278839 DOI: 10.1134/s0012496606050085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
|
86
|
Sidorov GV, Myasoedov NF. The solid-state synthesis of tritium labelled heterocyclic bases. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580340406] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
87
|
Filikov AV, Jones JR, Myasoedov NF, Ward ES. Application of solid state catalytic hydrogen isotope exchange to the tritium labeling of lysozyme. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580360210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
88
|
Zolotarev YA, Dolotov OV, Inozemtseva LS, Dadayan AK, Dorokhova EM, Andreeva LA, Alfeeva LY, Grivennikov IA, Myasoedov NF. Degradation of the ACTH(4-10) analog Semax in the presence of rat basal forebrain cell cultures and plasma membranes. Amino Acids 2006; 30:403-8. [PMID: 16773243 DOI: 10.1007/s00726-006-0328-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2005] [Accepted: 12/29/2005] [Indexed: 10/24/2022]
Abstract
Here a new approach of the elucidation of paths of proteolytic biodegradation of physiologically active peptides, based on the use of a peptide with isotopic label at all amino acid residues and the enrichment of HPLC samples with unlabeled peptide fragments in UV-detectable concentration, has been proposed. The method has been applied for the investigation of degradation dynamics of the neuroactive heptapeptide MEHFPGP (Semax) in the presence of plasma membranes, and cultures of glial and neuronal cells obtained from the rat basal forebrain. The splitting away of ME and GP, and formation of pentapeptides are the predominant processes in the presence of all tested objects, whereas the difference in patterns of resulting peptide products for glial and neuronal cells has been detected. In conclusion, the approach applied allows analyzing physiologically active peptide concentrations in biological tissues and degradation pathways of peptides in the presence of targets of their action.
Collapse
|
89
|
Zolotarev YA, Borisov YA, Dadayan AK, Myasoedov NF. Isotopic effects in the electronic spectra of tryptophan. Amino Acids 2006; 31:403-7. [PMID: 16583318 DOI: 10.1007/s00726-005-0267-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Accepted: 10/21/2005] [Indexed: 11/26/2022]
Abstract
No influence of isotopic substitution in deuterium-substituted tryptophan on the florescence excitation spectrum has previously been found out. Here, the isotopic effects of electronic excitation of deuterium-substituted tryptophan were experimentally and theoretically analyzed for first time. It was shown a short-wave shift of the UV-absorption maximum at 220 nm corresponding to the 360 cal/mol and short-wave shift for fluorescence spectrum corresponding to the 210 cal/mol. To account for this effect, the quantum chemical calculations of the geometric and electron structure, frequencies of normal vibrations and transition energies have been performed. The isotopic effects originate from the zero-point energies of ground and excited states. It was found that isotopic shifts depend on the position of isotope in the molecule and kind of transition. So, it can be utilized in the analysis of proteins structure and complexation.
Collapse
|
90
|
Sebentsova EA, Levitskaya NG, Andreeva LA, Alfeeva LY, Kamenskii AA, Myasoedov NF. Effects of semax against the background of dopaminergic receptor blockade with haloperidol. Bull Exp Biol Med 2006; 141:170-4. [PMID: 16984088 DOI: 10.1007/s10517-006-0119-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We studied the neurotropic effects of ACTH(4-10) analog semax against the background of dopaminergic receptors blockade with haloperidol. Intranasal administration of semax (0.05, 0.2, and 0.6 mg/kg) produced virtually no effect on disturbances of orientation and exploratory reactions and motor activity caused by intraperitoneal injection of 0.2 mg/kg haloperidol. By contrast, preliminary administration of 0.05 mg/kg semax prevented haloperidol-induced disturbances in active avoidance conditioning.
Collapse
|
91
|
Ashmarin IP, Samonina GE, Lyapina LA, Kamenskii AA, Levitskaya NG, Grivennikov IA, Dolotov OV, Andreeva LA, Myasoedov NF. Natural and hybrid (“chimeric”) stable regulatory glyproline peptides. PATHOPHYSIOLOGY 2005; 11:179-185. [PMID: 15837162 DOI: 10.1016/j.pathophys.2004.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Revised: 10/08/2004] [Accepted: 10/12/2004] [Indexed: 10/26/2022] Open
Abstract
The present concept of relative instability of regulatory peptides (RPs) in organisms must be amended. The recently characterized family of glyprolines and some other prolyl-glycyl-proline (PGP)-containing oligopeptides show the stability quite comparable with those of major pharmacological preparations. The ability of glyprolines to pass gastro-enteric tract barriers opens ways to per-oral administration of this new group of drugs such as semax, selank and their fragments. The most interesting approach is the creation of hybrid ("chimeric") peptide drugs combining the unmodified representatives of various natural RPs that distinctly manifest their inherent physiological activities and cooperate with each other in stabilization of whole peptide in vivo. As the result, the activity of such peptides as semax and selank may have value in a vide variety of pathological processes.
Collapse
|
92
|
Pavlov TS, Samonina GE, Andreeva LA, Myasoedov NF, Ashmarin IP. A new property of the synthetic anxiolytic Selank and its derivatives. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2004; 397:281-3. [PMID: 15508574 DOI: 10.1023/b:dobs.0000039692.94366.2c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
93
|
Romanov SG, Ivanov IV, Shevchenko VP, Nagaev IY, Pushkov AA, Myasoedov NF, Myagkova GI, Kuhn H. Synthesis of (5Z,8Z,11Z,14Z)-18- and 19-azidoeicosa-5,8,11,14-tetraenoic acids and their [5,6,8,9,11,12,14,15-3H8]-analogues through a common synthetic route. Chem Phys Lipids 2004; 130:117-26. [PMID: 15172828 DOI: 10.1016/j.chemphyslip.2004.02.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2003] [Revised: 02/12/2004] [Accepted: 02/16/2004] [Indexed: 11/28/2022]
Abstract
Total synthesis of (5Z,8Z,11Z,14Z)-18- and 19-azidoeicosa-5,8,11,14-tetraenoic acids and their [5,6,8,9,11,12,14,15-3H8]-analogues via the corresponding p-toluenesulphonates is reported. This synthetic approach allows the preparation of radioactively labelled arachidonic acid derivatives following a common synthetic route. Activity assays indicated that 15-lipoxygenases may tolerate the azido group in the substrate binding pocket and thus, radioactively labelled azido compounds may be used as photo-affinity probes to investigate mechanistic features of eicosanoid biosynthesis.
Collapse
|
94
|
Dolotov OV, Seredenina TS, Levitskaya NG, Kamensky AA, Andreeva LA, Alfeeva LY, Nagaev IY, Zolotarev YA, Grivennikov IA, Engele Y, Myasoedov NF. The heptapeptide SEMAX stimulates BDNF expression in different areas of the rat brain in vivo. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2004; 391:292-5. [PMID: 14556513 DOI: 10.1023/a:1025177812262] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
95
|
Levitskaya NG, Sebentsova EA, Andreeva LA, Alfeeva LY, Kamenskii AA, Myasoedov NF. The Neuroprotective Effects of Semax in Conditions of MPTP-Induced Lesions of the Brain Dopaminergic System. ACTA ACUST UNITED AC 2004; 34:399-405. [PMID: 15341218 DOI: 10.1023/b:neab.0000018752.59465.28] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This report describes studies cf the effects of the ACTH(4-10) analog Semax (MEHFPGP) on the behavior of white rats with lesions to the brain dopaminergic system induced by the neurotoxin MPTP. Neurotoxin was given as single i.p. doses of 25 mg/kg. Neurotoxin injections were shown to decrease movement activity and increase anxiety in the animals. Daily intranasal administration of Semax at a dose of 0.2 mg/kg decreased the severity of MPTP-induced behavioral disturbances. The protective activity of Semax in MPTP-induced lesions of the brain dopaminergic system may be associated with both its modulating effect on the dopaminergic system and the neurotrophic action of the peptide.
Collapse
|
96
|
Groza NV, Ivanov IV, Romanov SG, Shevchenko VP, Myasoedov NF, Nigam S, Myagkova GI. Synthesis of tritium labelled 3(R)-HETE and 3(R),18(R/S)-DiHETE through a common synthetic route. J Labelled Comp Radiopharm 2004. [DOI: 10.1002/jlcr.791] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
97
|
Zolotarev YA, Dadayan AK, Borisov YA, Dorokhova EM, Kozik VS, Vtyurin NN, Bocharov EV, Ziganshin RN, Lunina NA, Kostrov SV, Ovchinnikova TV, Myasoedov NF. The effect of three-dimensional structure on the solid state isotope exchange of hydrogen in polypeptides with spillover hydrogen. Bioorg Chem 2003; 31:453-63. [PMID: 14613766 DOI: 10.1016/j.bioorg.2003.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of the three-dimensional structure of polypeptides and proteins on their ability to undergo isotopic exchange under the action of spillover hydrogen (SH) in the high temperature solid state catalytic isotope exchange reaction (HSCIE) was theoretically and experimentally studied. The HSCIE reaction in the beta-galactosidase protein from Thermoanaerobacter ethanolicus (83kDa) was studied. The influence of the beta-galactosidase structure on isotopic exchange as peptide fragments with spillover tritium was studied. The most accessible peptide fragment, which does not contribute to alpha-helix and beta-strand formations (KEMQKE215-220), had the largest relative reactivity. The one located in the contact area between the subunits (YLRDSE417-422) showed the smallest relative reactivity. The relative reactivities of these peptides differ more than 150 times. Data collected during a study devoted to the HSCIE reaction of the beta-galactosidase protein indicate that the HSCIE reaction might be employed for acquiring information about their three-dimensional structure and protein-protein interactions. The results of ab initio calculations have shown that alpha-helix formation in polypeptides decreases the reactivity in HSCIE. Hydrogen exchange in the alpha-helical fragment Trp1-Leu8 of zervamycin IIB was also analyzed using theoretical methods. It was shown by ab initio quantum-chemical calculations that the high degree of substitution of C(alpha)H for tritium in Gln3 might be associated with the participation of electron donor O and N atoms in transition state stabilization in the HSCIE reaction.
Collapse
|
98
|
Ivanov IV, Romanov SG, Shevchenko VP, Rozhkova EA, Maslov MA, Groza NV, Myasoedov NF, Kuhn H, Myagkova GI. A convergent synthesis of (17R,5Z,8Z,11Z,14Z)-17-hydroxyeicosa-5,8,11,14-tetraenoic acid analogues and their tritiated derivatives. Tetrahedron 2003. [DOI: 10.1016/j.tet.2003.08.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
99
|
Zolotarev YA, Dadayan AK, Bocharov EV, Borisov YA, Vaskovsky BV, Dorokhova EM, Myasoedov NF. New development in the tritium labelling of peptides and proteins using solid catalytic isotopic exchange with spillover-tritium. Amino Acids 2003; 24:325-33. [PMID: 12707815 DOI: 10.1007/s00726-002-0404-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism of the reaction of high temperature solid state catalytic isotope exchange (HSCIE) of hydrogen in peptides with spillover-tritium at 140-180 degrees C was analyzed. This reaction was used for preparing [(3)H]enkephalins such as [(3)H]DALG with specific activity of 138 Ci/mmol and [(3)H]LENK with specific activity of 120 Ci/mmol at 180 degrees C. The analogues of [(3)H]ACTG(4-10) with specific activity of 80 Ci/mmol, [(3)H]zervamicin IIB with specific activity of 70 Ci/mmol and [(3)H]conotoxin G1 with specific activity 35 Ci/mmol were produced. The obtained preparations completely retained their biological activity. [(3)H]Peptide analysis using (3)H NMR spectroscopy on a Varian UNITY-600 spectrometer at 640 MHz was carried out. The reaction ability of amino fragments in HSCIE was shown to depend both of their structures and on the availability and the mobility of the peptide chain. The reaction of HSCIE with the beta-galactosidase from Termoanaerobacter ethanolicus was studied. The selected HSCIE conditions allow to prepare [(3)H] beta-galactosidase with specific activity of 1440 Ci/mmol and completely retained its the enzymatic activity.
Collapse
|
100
|
Zolotarev YA, Zhuikova SE, Ashmarin IP, Myasoedov NF, Vas'kovskii BV, Samonina GE. Metabolism of PGP peptide after administration via different routes. Bull Exp Biol Med 2003; 135:361-4. [PMID: 12910309 DOI: 10.1023/a:1024612831380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2002] [Indexed: 11/12/2022]
Abstract
Main pathways of degradation of PGP peptide possessing antiulcer and antithrombotic activities were studied after its intraperitoneal, intragastric, and intraintestinal administration. In experiments on rabbits we showed by HPLC that unmodified PGP is released into the blood after administration by all three routes and is detected in the plasma over 3-5 h. PG dipeptide is a more stable PGP metabolite presumably determining (together with tripeptide) its pharmacological properties.
Collapse
|