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Ivanov I, Manolov S, Bojilov D, Marc G, Dimitrova D, Oniga S, Oniga O, Nedialkov P, Stoyanova M. Novel Flurbiprofen Derivatives as Antioxidant and Anti-Inflammatory Agents: Synthesis, In Silico, and In Vitro Biological Evaluation. Molecules 2024; 29:385. [PMID: 38257299 PMCID: PMC10818523 DOI: 10.3390/molecules29020385] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/05/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024] Open
Abstract
In this study, we present the synthesis of five novel compounds by combining flurbiprofen with various substituted 2-phenethylamines. The synthesized derivatives underwent comprehensive characterization using techniques such as 1H- and 13C-NMR spectroscopy, UV-Vis spectroscopy, and high-resolution mass spectrometry (HRMS). Detailed HRMS analysis was performed for each of these newly created molecules. The biological activities of these compounds were assessed through in vitro experiments to evaluate their potential as anti-inflammatory and antioxidant agents. Furthermore, the lipophilicity of these derivatives was determined, both theoretically using the cLogP method and experimentally through partition coefficient (RM) measurements. To gain insights into their binding affinity, we conducted an in silico analysis of the compounds' interactions with human serum albumin (HSA) using molecular docking studies. Our findings reveal that all of the newly synthesized compounds exhibit significant anti-inflammatory and antioxidant activities, with results statistically comparable to the reference compounds. Molecular docking studies further explain the observed in vitro results, shedding light on the molecular mechanisms behind their biological activities. Using in silico method, toxicity was calculated, resulting in LD50 values. Depending on the administration route, the novel flurbiprofen derivatives show lower toxicity compared to the standard flurbiprofen.
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Affiliation(s)
- Iliyan Ivanov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street., 4000 Plovdiv, Bulgaria; (D.B.); (D.D.); (M.S.)
| | - Stanimir Manolov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street., 4000 Plovdiv, Bulgaria; (D.B.); (D.D.); (M.S.)
| | - Dimitar Bojilov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street., 4000 Plovdiv, Bulgaria; (D.B.); (D.D.); (M.S.)
| | - Gabriel Marc
- Department of Pharmaceutical Chemistry, “Iuliu Hațieganu” University of Medicine and Pharmacy, 41 Victor Babeș Street, 400012 Cluj-Napoca, Romania; (G.M.); (O.O.)
| | - Diyana Dimitrova
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street., 4000 Plovdiv, Bulgaria; (D.B.); (D.D.); (M.S.)
| | - Smaranda Oniga
- Department of Therapeutic Chemistry, “Iuliu Hațieganu” University of Medicine and Pharmacy, 12 Ion Creangă Street, 400010 Cluj-Napoca, Romania;
| | - Ovidiu Oniga
- Department of Pharmaceutical Chemistry, “Iuliu Hațieganu” University of Medicine and Pharmacy, 41 Victor Babeș Street, 400012 Cluj-Napoca, Romania; (G.M.); (O.O.)
| | - Paraskev Nedialkov
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University of Sofia, 2 Dunav Street, 1000 Sofia, Bulgaria;
| | - Maria Stoyanova
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street., 4000 Plovdiv, Bulgaria; (D.B.); (D.D.); (M.S.)
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Bojilov D, Manolov S, Ahmed S, Dagnon S, Ivanov I, Marc G, Oniga S, Oniga O, Nedialkov P, Mollova S. HPLC Analysis and In Vitro and In Silico Evaluation of the Biological Activity of Polyphenolic Components Separated with Solvents of Various Polarities from Helichrysum italicum. Molecules 2023; 28:6198. [PMID: 37687028 PMCID: PMC10488648 DOI: 10.3390/molecules28176198] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/15/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
Helichrysum italicum has piqued the interest of many researchers in recent years, mostly for its essential oil, but increasingly for its polyphenolic content as well. In the current study, we examine the polyphenolic composition of H. italicum grown in Bulgaria. The polyphenolic complex was fractionated with solvents of various polarities, including hexane, chloroform, ethyl acetate, and butanol, in order to assess the biological impact of the components. HPLC-PDA and UHPLC-MS/MS were used to examine all fractions. The green coffee fingerprint profile was employed as a "surrogate standard" in the polyphenolic components detection approach. From the UHPLC-MS/MS analysis, we identified 60 components of the polyphenolic complex such as quercetin 3-O-glucuronide, quercetin acetyl-glycoside, isorhamnetin acetyl-glycoside, isorhamnetin caffeoyl-glycoside, quercetin caffeoyl-malonyl-glycoside, isorhamnetin coumaroyl-glycoside, coumaroyl-caffeoylquinic acid, and diCQA-acetyl-derivative were first reported in the composition of H. italicum. The biological activity of the fractions was evaluated in vitro and in silico, which included the fight against oxidative stress (hydrogen peroxide scavenging activity (HPSA), hydroxyl radical scavenging activity (HRSA), metal-chelating activity (MChA)) and nitrosative (nitric oxide scavenging activity) (NOSA)), in vitro anti-inflammatory, and anti-arthritic activity. Results are presented as IC50 ± SD μg/mL. The analysis showed that the EtOAc fraction was characterized by highest HPSA (57.12 ± 1.14 μg/mL), HRSA (92.23 ± 1.10 μg/mL), MChA (5.60 ± 0.17 μg/mL), and NOSA (89.81 ± 2.09 μg/mL), while the hexane and chloroform fractions showed significantly higher in vitro anti-inflammatory activity (30.48 ± 2.33 μg/mL, 62.50 ± 1.69 μg/mL) compared to the standard ibuprofen. All three fractions showed potential anti-arthritic activity (102.93 ± 8.62 μg/mL, 108.92 ± 4.42 μg/mL, 84.19 ± 3.89 μg/mL).
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Affiliation(s)
- Dimitar Bojilov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street, 4000 Plovdiv, Bulgaria; (S.A.); (S.D.); (I.I.)
| | - Stanimir Manolov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street, 4000 Plovdiv, Bulgaria; (S.A.); (S.D.); (I.I.)
| | - Sezan Ahmed
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street, 4000 Plovdiv, Bulgaria; (S.A.); (S.D.); (I.I.)
| | - Soleya Dagnon
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street, 4000 Plovdiv, Bulgaria; (S.A.); (S.D.); (I.I.)
| | - Iliyan Ivanov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 24 “Tsar Assen” Street, 4000 Plovdiv, Bulgaria; (S.A.); (S.D.); (I.I.)
| | - Gabriel Marc
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400010 Cluj-Napoca, Romania; (G.M.); (O.O.)
| | - Smaranda Oniga
- Department of Therapeutic Chemistry, “Iuliu Hațieganu” University of Medicine and Pharmacy, 12 Ion Creangă Street, RO-400010 Cluj-Napoca, Romania;
| | - Ovidiu Oniga
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 41 Victor Babeș Street, RO-400010 Cluj-Napoca, Romania; (G.M.); (O.O.)
| | - Paraskev Nedialkov
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University of Sofia, 2 Dunav Street, 1000 Sofia, Bulgaria;
| | - Silviya Mollova
- Institute of Roses, Essential and Medical Plants, Agricultural Academy, 49 Osvobozhdenie Blvd., 6100 Kazanlak, Bulgaria;
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Bojilov D, Manolov S, Nacheva A, Dagnon S, Ivanov I. Characterization of Polyphenols from Chenopodium botrys after Fractionation with Different Solvents and Study of Their In Vitro Biological Activity. Molecules 2023; 28:4816. [PMID: 37375371 DOI: 10.3390/molecules28124816] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/14/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
In the present work, we have investigated the polyphenolic composition of Chenopodium botrys from Bulgaria. The polyphenols were fractionated with solvents of varying polarity (n-hexane, chloroform, ethyl acetate, and n-butanol). The fractions were analyzed by HPLC-PDA and UHPLC-MS. The ethyl acetate fraction contained mono- and di-glycosides of quercetin, di-glycosides of kaempferol, and isorhamnetin and monoglycosides of hispidulin and jaceosidine. We found quercetin triglycosides in the butanol fraction. The ethyl acetate and butanol fractions contained 168.82 mg/g Extr and 67.21 mg/g Extr of quercetin glycosides, respectively. The main components of the polyphenolic complex in C. botrys were 6-methoxyflavones (355.47 mg/g Extr), which were found in the chloroform fraction. The flavonoids pectolinarigenin, demethylnobiletin, and isosinensetin, and the glycosides of quercetin (triglycosides, acylglycosides), kaempferol, isorhamnetin, hispidiulin, and jaceosidine, were discovered and reported in Chenopodium botrys for the first time. We used in vitro methods to assess the biological activity against oxidative stress (hydrogen peroxide scavenging activity (HPSA) and hydroxyl radical scavenging activity (HRSA)), nitrosative stress (nitric oxide scavenging activity (NOSA)), anti-inflammatory activity (IAD inhibition), and anti-tryptic activity (ATA). Quercetin mono- and di-glycosides exhibited greater HPSA and HRSA (IC50 = 39.18, 105.03 µg/mL), while 6-methoxyflavones had a greater NOSA (IC50 = 146.59 µg/mL). The same components showed the highest ATA (IC50 ranging from 116.23 to 202.44 µg/mL).
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Affiliation(s)
- Dimitar Bojilov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Stanimir Manolov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Angelika Nacheva
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Soleya Dagnon
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Iliyan Ivanov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
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Mollova S, Dzhurmanski A, Fidan H, Bojilov D, Manolov S, Dincheva I, Stankov S, Stoyanova A, Ercisli S, Assouguem A, Marc RA, Ullah R, Bari A. Chemical Composition of Essential Oils from Nepeta transcaucasica Grossh. and Nepeta cataria L. Cultivated in Bulgaria and Their Antimicrobial and Antioxidant Activity. ACS Omega 2023; 8:15441-15449. [PMID: 37151483 PMCID: PMC10157675 DOI: 10.1021/acsomega.3c00704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/28/2023] [Indexed: 05/09/2023]
Abstract
The genus Nepeta, belonging to the family Lamiaceae, includes about 300 species, most of which are used in folk medicine due to their pronounced biological properties. The aim of the present study was to evaluate the agrobiological characteristics of Nepeta transcaucasica (N. transcaucasica) Grossh. and Nepeta cataria (N. cataria) L., cultivated in Bulgaria, and obtain their essential oils and determine their antimicrobial and antioxidant activities. The agrobiological characteristics of the two species growing in Kazanlak were analyzed; therefore, high variability in the population of N. transcaucasica and comparative homogeneity in N. cataria was shown. The species N. transcaucasica contained 0.28% essential oil with main components β-citronellol (52.05%), eucalyptol (7.34%), β-citronellal (6.06%), germacrene D (5.45%), (Z)-β-ocimene (5.14%), and β-caryophyllene (3.06%). The species N. cataria consisted of 0.19% essential oil with main components β-citronellol (26.31%), geraniol (15.92%), neral (11.45%), nerol (9.56%), carvacrol (6.04%), and β-citronellal (5.35%). The antibacterial activity against Gram-positive bacteria Listeria monocytogenes and Staphylococcus aureus and Gram-negative bacteria Escherichia coli (E. coli) and Salmonella enterica subsp. enterica serovar Abony was determined. The essential oils showed antimicrobial activity only against E. coli. The diameters of the inhibition zones were found to be 26 mm for the species N. transcaucasica and 10 mm for the species N. cataria. The antioxidant activity of the two essential oils was also determined by four different methods, DPPH, ABTS, FRAP, and CUPRAC, with the highest values for the ABTS radical, for the species N. transcaucasica (48.72 μM TE/mL), and the species N. cataria (310 μM TE/mL).
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Affiliation(s)
- Silviya Mollova
- Institute
of Roses, Essential and Medical Plants, Agricultural Academy, Kazanlak 6100, Bulgaria
| | - Anatoli Dzhurmanski
- Institute
of Roses, Essential and Medical Plants, Agricultural Academy, Kazanlak 6100, Bulgaria
| | - Hafize Fidan
- University
of Food Technologies, Plovdiv 4000, Bulgaria
| | - Dimitar Bojilov
- Paisii
Hilendarski University of Plovdiv, Plovdiv 4000, Bulgaria
| | - Stanimir Manolov
- Paisii
Hilendarski University of Plovdiv, Plovdiv 4000, Bulgaria
| | - Ivayla Dincheva
- Plant
Genetic Research Group, AgroBioInstitute, Agricultural Academy, Sofia 1000, Bulgaria
| | | | | | - Sezai Ercisli
- Department
of Horticulture, Faculty of Agriculture, Ataturk University, 25240 Erzurum, Türkiye
- HGF
Agro, Ata Teknokent, TR-25240 Erzurum, Türkiye
| | - Amine Assouguem
- Laboratory
of Functional Ecology and Environment, Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer Street, P.O. Box 2202, Fez 2202, Morocco
| | - Romina Alina Marc
- Food
Engineering Department, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary
Medicine, 400372 Cluj-Napoca, Romania
- Technological
Transfer Center “CTT-BioTech”, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Floreşti Street, No.
64, 400509 Cluj-Napoca, Romania
| | - Riaz Ullah
- Department
of Pharmacognosy, College of Pharmacy, King
Saud University, Riyadh, Riyadh Province 11451, Saudi Arabia
| | - Ahmed Bari
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Riyadh Province 11451, Saudi Arabia
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Manolov S, Ivanov I, Bojilov D, Nedialkov P. Synthesis, In Vitro Anti-Inflammatory Activity, and HRMS Analysis of New Amphetamine Derivatives. Molecules 2022; 28:molecules28010151. [PMID: 36615344 PMCID: PMC9822421 DOI: 10.3390/molecules28010151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
Herein, we report the obtaining of new hybrid molecules of amphetamine with different profens (amfens). The obtained amfens are characterized by their melting points, UV, 1H-, 13C-NMR, and HRMS spectra. A complete and detailed mass spectral analysis of the newly obtained derivatives of amphetamine with ibuprofen, flurbiprofen, ketoprofen, naproxen, and carprofen was performed. In vitro inhibition of albumin denaturation of each new compound was assessed, and they showed significant activity. The IC50 values of the obtained amphetamine-profen derivatives ranged from 92.81 to 159.87 µg/mL. This indicates that the new hybrids inherit the anti-inflammatory properties of profens. Using in silico method, the toxicity was also calculated. The obtained results are given in LD50 values. Depending on the route of administration, the amfens are less toxic compared to the standard amphetamine.
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Affiliation(s)
- Stanimir Manolov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Iliyan Ivanov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
- Correspondence: ; Tel./Fax:+359-32-261-349
| | - Dimitar Bojilov
- Department of Organic Chemistry, Faculty of Chemistry, University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Paraskev Nedialkov
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University of Sofia, 1000 Sofia, Bulgaria
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Manolov S, Ivanov D, Itchev K. RECHERCHES HISTOCHIMIQUES ET MORPHOLOGIQUES SUR LES TERMINAISONS NERVEUSES MOTRICES DU MUSCLE VOCAL DU CHAT. Cells Tissues Organs 2008. [DOI: 10.1159/000142673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Abstract
The prenatal development of the rat amygdaloid complex was studied ultrastructurally day by day starting from the 12th embryonic day (ED12) until birth (ED22). In the earlier stages of embryogenesis, the nerve cells were observed to be of small size. A thin cytoplasmic ring rich in free ribosomes surrounded the oval nuclei. The nucleoli were prominent their number being two or more in a nucleus. The intercellular spaces were wide. A significant advance in the development of the nerve cells and the neuropil was detected in the period between ED15 and ED18. This advance was represented by an increase in the cytoplasmic volume, appearance and development Golgi zones, grouping of the free ribosomes into rosettes, appearance of single synaptic contacts, and a ramification of large-calibre nerve processes that continued during the later stages of the embryogenesis (ED19-ED22). By the end of the prenatal period the number of the synaptic contacts increased and well-developed synaptic apparatuses were observed. The development of the organelles in the perikarya was also advanced. Nissl bodies were found in some neurons. The number of enlarged Golgi zones and mitochondria increased.
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Affiliation(s)
- A Manolova
- Regeneration Research Laboratory, Bulgarian Academy of Sciences, Sofia
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Manolov S. Localization of the cholinesterase activity in the synapses. Trab Inst Cajal 1984; 75:5-17. [PMID: 6545977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Manolov S. Regeneration of Rat Neuromuscular Synapses. Progress in Brain Research 1979. [DOI: 10.1016/s0079-6123(08)64683-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Cheresharov L, Ovtscharoff W, Manolov S. Ultrastructural changes in the anterior horn synapses of rat spinal cord under different locomotor conditions. J Neural Transm (Vienna) 1978; 42:9-21. [PMID: 641546 DOI: 10.1007/bf01262725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ultrastructural changes in axodendritic synapses of the spinal cord ventral horn are studied in rats subjected to different locomotor conditions: immobilization, control and physical loading. Enhanced motor activity results in a reduction of the number of synaptic vesicles in the axon terminal, as well as flattening and diminution of their size. Other changes correlated with the different motor regimes are likewise established in the number of terminal ending's mitochondria, in "active zones", in subjunctional dense bodies, and in the bouton area. Data are treated by means of variation analysis. The significance of differences is established by "T"-criterion.
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Ovtscharoff W, Manolov S. Cytochemical localization of adenosine triphosphatase and thiamine pyrophosphatase in the synapases of rat's cerebral cortex. Acta Histochem 1977; 60:329-38. [PMID: 147001 DOI: 10.1016/s0065-1281(77)80016-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ultrastructural distribution of adenosine triphosphatase and thiamine pyrophosphatase in synapses of rat's cerebral cortex was studied. Adenosine triphosphatase activity in some synaptic vesicles and mitochondria, on pre- and postsynaptic membranes, as well as in the postsynaptic thickening was established. The reaction specificity was proved by means of some controls: various concentrations of ouabain, NaF, NiCl2, cysteine, substrate free medium and non-specific substrates - cocarboxylase and beta-glycerophosphate. At the thiamine pyrophatase reaction, the enzyme positive product was found on the membrane of some clear synaptic vesicles, on the singl sacs of smooth endoplasmic reticulum in the axon terminal, and bouton cell membrane. Substrate free medium, addition of cystein and substitution of orininal substrate with adenosine triphosphate and beta-glycerophosphate as controls were used. The fine structure localization of both enzymes in synaptic structures suggests their important role in the synaptic function.
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Manolov S. [Ultrastructure of the synapses]. Nar Zdrav 1973; 29:55-62. [PMID: 4793356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Galabov G, Manolov S. [Lamellar bodies in Goll's nucleus]. Brain Res 1971; 35:292-4. [PMID: 5134236 DOI: 10.1016/0006-8993(71)90621-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Manolov S. [Ultrastructural peculiarities of neuromuscular junctions]. C R Assoc Anat 1970; 149:848-51. [PMID: 5525252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Petkov P, Galabova R, Manolov S. Electron microscopic investigations on the Langerhans islets of the golden hamster. Arch Histol Jpn 1970; 32:229-38. [PMID: 4918708 DOI: 10.1679/aohc1950.32.229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Galabov G, Davidoff M, Manolov S. [Comparative methodical studies on the activity of acid phosphatase and 5'-nucleotidase in the spinal cord of normal rabbits and following section of the brachial plexus]. Histochemie 1969; 17:232-40. [PMID: 5363021 DOI: 10.1007/bf00309867] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Galabov G, Manolov S, Venkov L, Nikolov T, Itchev K. Studies on cholinesterase activity of anterior horn cells after transection of the spinal cord and plexus brachialis. Acta Anat (Basel) 1967; 68:432-41. [PMID: 5242224 DOI: 10.1159/000143046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Manolov S. [Cholinesterase activity and nerve endings in the striated musculature]. Arkh Anat Gistol Embriol 1965; 49:19-22. [PMID: 5896211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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21
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Petkov PE, Manolov S. [Histochemical study of nerve ganglia of the pancreas]. Arkh Anat Gistol Embriol 1965; 49:42-7. [PMID: 4290773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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