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1.
Iran J Pharm Res ; 17(1): 317-325, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29755562

RESUMO

The genus Achillea (Asteraceae) consisting of important medicinal species, growing wildly in Iran, of which A. tenuifolia is found in Iran-o-Turan regions. Regarding the traditional use of Achillea species for treatment of diabetes and also lack of information on phyto-constituents of A. tenuifolia underground parts, in this study anti-diabetic activity of the plant have been reported. In order to find the main active components, underground parts of the plant were extracted with water and fractioned by hexane, ethyl acetate, and methanol and the separation of the main compounds were carried out via medium pressure liquid chromatography (MPLC). Also, anti-diabetic effects of the extract were investigated on rat pancreatic islets. The root extract of the plant as well as the compound ß-sitosterol showed moderate α-amylase inhibitory activity, however prangol did not suppress the enzyme activity. The results of islet cells' bio-function assays revealed that the herb root extract was able to increase the secretion of insulin in high concentration (10 mg/mL) and improved the cell viability with no toxicity in all doses. Furthermore, the herbal extract could reduce the levels of reactive oxygen species (ROS) and lipid peroxidation (LPO). The plant extract also significantly decreased the enzyme activity for both caspase-3 and -9 and increased the antioxidant capacity of the isolated cells. Taking together, preparations or extracts from the underground parts of the plant are good candidates for further anti-diabetic investigation and clinical trials.

2.
Bol. latinoam. Caribe plantas med. aromát ; 17(1): 61-67, ene. 2018. tab
Artigo em Inglês | LILACS | ID: biblio-915128

RESUMO

Phthalate derivatives cause a number of risks to human health and the environment. Essential oil and volatile fractions of some vegetables and herbal products were extracted by hydrodistillation and percolation methods to analyze using gas chromatography and mass spectrometry (GC-MS) for evaluation of phthalate contaminations. The results revealed that four vegetables and all aromatic waters were contaminated by phthalate derivatives including di-n-butyl phthalate (DBP), diisobutyl phthalate and di-(2-ethylhexyl) phthalate (DEHP) (0.1-7.95%). Butylated hydroxytoluene (BHT), a widely used synthetic antioxidant, was also found in the most of the aromatic waters in the range of 3.15-61.3%. In addition, three vegetable samples contained diazinon (0.36-4.61%), an organophosphorus insecticide. Plants and herbal preparations may be contaminated by the absorption of phthalates from contaminated water or soil or by the migration of phthalates from inexpensive recycled plastic. Regarding the widespread use and associated health risks of phthalates, effective quality and safety regulations for herbal products should be implemented with respect to their phthalate content.


Los derivados de ftalato causan una serie de riesgos para la salud humana y el medio ambiente. El aceite esencial y las fracciones volátiles de algunos vegetales y productos a base de hierbas fueron extraídos mediante hidrodestilación y métodos de percolación y luego fueron analizados mediante cromatografía de gases y espectrometría de masas (GC-MS) con el propósito de identificar contaminación con ftalatos. Los resultados revelaron que cuatro productos herbales y todas las aguas aromáticas analizadas estaban contaminadas con derivados de ftalato, incluyendo el ftalato de dibutulo (DBP), ftalato de diisobutilo y ftalato de bis(2-etilhexilo) (DEHP) (0.1-7.95%). El butilhidroxitolueno (BHT), un antioxidante sintético ampliamente utilizado, también se encontró en aguas aromáticas en el rango de 3.15- 61.3%. Además, tres muestras vegetales contenían diazinón (0.36-4.61%), un insecticida organofosforado. Las plantas y las preparaciones herbales pueden ser contaminadas a partir de absorción de ftalatos del agua o el suelo contaminados o por la migración de ftalatos desde plástico reciclado de bajo costo. Con respecto al uso generalizado y los riesgos asociados a la salud de los ftalatos, deben implementarse normas efectivas de calidad y seguridad para los productos a base de hierbas con respecto a su contenido de ftalato.


Assuntos
Ácidos Ftálicos/análise , Poluentes Químicos da Água/análise , Óleos Voláteis/química , Preparações de Plantas/química , Cromatografia Gasosa-Espectrometria de Massas
3.
Turk J Pharm Sci ; 15(1): 103-106, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32454647

RESUMO

OBJECTIVE: Cymbocarpum erythraeum (Apiaceae) is an endemic species in Iran. Up to now, there have been no phytochemical and biological investigations on this species. Therefore, isolation of the main secondary metabolites of the plant along with its anti-H. pylori activity have been considered in this paper. MATERIALS AND METHODS: The dried parts of the plant were extracted with different solvents using solvent percolation and the antibacterial activity of the extracts evaluated by the disk diffusion method. Four compounds were isolated using different column chromatography methods. RESULTS: The compounds were identified by proton nuclear magnetic resonance and carbon-13 nuclear magnetic resonance as isoquercetin (1), rutin (2), ß-sitosterol (3) and 2-decenol (4). CONCLUSION: Anti-H. pylori evaluation of the extracts and isolated compounds against three clinical isolates of H. pylori revealed that hexane extract of the plant inhibited all H. pylori strains.

4.
Bol. latinoam. Caribe plantas med. aromát ; 16(6): 570-577, nov. 2017. ilus, tab
Artigo em Inglês | LILACS | ID: biblio-914938

RESUMO

Most species of genus Artemisia L. (Compositae) are medicinal herbswith several uses in the folk medicine worldwide. In the present study, methanol extract of Artemisia santolina has been subjected for isolation of its metabolites along with evaluation of cytotoxic activity against Artemia salina larvae. The structures of the compounds determined by 1H-and 13C-NMR, HMQC, HMBC, 1H-1H COSY and Mass spectral analysis. Two sesquiterpenes, 1,5-dihydroxy- 4(15)eudesman-12,6-olid (artemin) (1), 2-hidroxy-2,6,10-trimethyl-7,10- oxide-3,11-dodecadien-5-one (2) and one flavonoid, 5,7,4'-trihydroxy-6,3'-dimethoxyflavone (jaceosidin) (3) have been successfully characterized. Cytotoxicity of the sesquiterpene lactone (1), was assessed on Artemia salina larvae and resulted in IC50 value of 6.44 µg/mL, which was more potent compared to the positive standard berberine hydrochloride (IC50 = 26 µg/mL). In this study, the separation and identification of two sesquiterpenes and one flavone from the aerial parts of A. santolina is described. Among them the compound artemin (1) showed a toxicity effect against A. salina nauplii.


La mayoría de las especies del género Artemisia L. (Compositae) son hierbas medicinales con varios usos en la medicina popular en todo el mundo. En el presente estudio, el extracto metanólico de Artemisia santolina ha sido sometido al aislamiento de sus metabolitos junto con la evaluación de la actividad citotóxica contra las larvas de Artemia salina. Las estructuras de los compuestos se determinaron mediante RMN 1H y 13C, HMQC, HMBC, 1H-1H COZY y análisis espectral de masas. Dos sesquiterpenos, 1,5-dihidroxi-4 (15) eudesman- 12,6-olid (artemin) (1), 2-hidroxi-2,6,10-trimetil-7,10-óxido-3,11-dodecadien-5-ona (2) y un flavonoide, 5,7,4'-trihidroxi-6,3'- dimetoxiflavona (jaceosidina) (3). Se evaluó la citotoxicidad de la lactona sesquiterpénica (1) en larvas de Artemia salina y resultó en un valor de CI50 de 6,44 µg/ml, que era más potente en comparación con el clorhidrato de berberina estándar positivo (CI50 = 26 µg/ml). En este estudio se describe la separación e identificación de dos sesquiterpenos y una flavona de las partes aéreas de A. santolina. Entre ellos, el compuesto artemin (1) mostró un efecto de toxicidad contra los nauplios de A. salina.


Assuntos
Artemia/efeitos dos fármacos , Artemisia/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Flavonoides/análise , Larva , Sesquiterpenos/análise
5.
Curr Pharm Biotechnol ; 17(11): 1016-22, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27396403

RESUMO

Pharmacognosy is a science, which study natural products as a source of new drug leads and effective drug development. Rational and economic search for novel lead structures could maximize the speed of drug discovery by using powerful high technology methods. Reverse pharmacognosy, a complementary to pharmacognosy, couples the high throughput screening (HTS), virtual screening and databases along with the knowledge of traditional medicines. These strategies lead to identification of numerous in vitro active and selective hits enhancing the speed of drug discovery from natural sources. Besides, reverse pharmacology is a target base drug discovery approach; in the first step, a hypothesis is made that the alteration of specific protein activity will produce beneficial curative effects. Both, reverse pharmacognosy and reverse pharmacology take advantages of high technology methods to accomplish their particular purposes. Moreover, reverse pharmacognosy effectively utilize traditional medicines and natural products as promising sources to provide new drug leads as well as promote the rational use of them by using valuable information like protein structure databases and chemical libraries which prepare pharmacological profile of traditional medicine, plant extract or natural compounds.


Assuntos
Produtos Biológicos/química , Descoberta de Drogas/métodos , Farmacognosia/métodos , Animais , Produtos Biológicos/isolamento & purificação , Bases de Dados Factuais , Descoberta de Drogas/tendências , Humanos , Medicina Tradicional/métodos , Medicina Tradicional/tendências , Farmacognosia/tendências , Estrutura Secundária de Proteína , Bibliotecas de Moléculas Pequenas/química
6.
Res Pharm Sci ; 11(1): 23-32, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27051429

RESUMO

α-Amylase inhibitors play a critical role in the control of diabetes and many of medicinal plants have been found to act as α-amylase inhibitors. Swertia genus, belonging to the family Gentianaceae, comprises different species most of which have been used in traditional medicine of several cultures as antidiabetic, anti-pyretic, analgesic, liver and gastrointestinal tonic. Swertia longifolia Boiss. is the only species of Swertia growing in Iran. In the present investigation, phytochemical study of S. longifolia was performed and α-amylase inhibitory effects of the plant fractions and purified compounds were determined. Aerial parts of the plant were extracted with hexane, chloroform, methanol and water, respectively. The components of the hexane and chloroform fractions were isolated by different chromatographic methods and their structures were determined by (1)H NMR and (13)C NMR data. α-Amylase inhibitory activity was determined by a colorimetric assay using 3,5-dinitro salysilic acid. During phytochemical examination, α-amyrin, ß-amyrin and ß-sitosterol were purified from the hexane fraction, while ursolic acid, daucosterol and swertiamarin were isolated from chloroform fraction. The results of the biochemical assay revealed α-amylase inhibitory activity of hexane, chloroform, methanol and water fractions, of which the chloroform and methanol fractions were more potent (IC50 16.8 and 18.1 mg/ml, respectively). Among examined compounds, daucosterol was found to be the most potent α-amylase inhibitor (57.5% in concentration 10 mg/ml). With regard to α-amylase inhibitory effects of the plant extracts, purified constituents, and antidiabetic application of the species of Swertia genus in traditional medicine of different countries, S. longifolia seems more appropriate species for further mechanistic antidiabetic evaluations.

7.
Pak J Pharm Sci ; 29(2): 623-8, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27087085

RESUMO

Ferulago carduchorum (Apiaceae family) is an endemic plant of Iran. The crude extract and four fractions of aerial parts of F. carduchorum in two vegetative stages (flower and fruit) were studied for their total phenolic contents, antimicrobial and antioxidant activities using folin-ciocalteu assay, micro dilution method and DPPH assay, respectively. The results indicated that the best antioxidant activity was determined in flower crude extract (IC50=0.44 mg/mL). The flower ethyl acetate fraction (FLE) showed better antimicrobial and antifungal activities than other fractions. So, FLE was selected for phytochemical investigations, resulting in isolation of a flavonoid (hesperetin). Hesperetin showed antimicrobial activity. The results showed that the antimicrobial and antioxidant effects during the flowering are obviously more than the fruit season.


Assuntos
Anti-Infecciosos/farmacologia , Antioxidantes/farmacologia , Apiaceae/química , Hesperidina/farmacologia , Fenóis/farmacologia , Extratos Vegetais/farmacologia , Anti-Infecciosos/isolamento & purificação , Antioxidantes/isolamento & purificação , Bactérias/efeitos dos fármacos , Bactérias/crescimento & desenvolvimento , Compostos de Bifenilo/química , Flores , Frutas , Fungos/efeitos dos fármacos , Fungos/crescimento & desenvolvimento , Hesperidina/isolamento & purificação , Testes de Sensibilidade Microbiana , Fenóis/isolamento & purificação , Fitoterapia , Picratos/química , Extratos Vegetais/isolamento & purificação , Plantas Medicinais , Solventes/química
8.
Metab Brain Dis ; 31(2): 395-404, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26638718

RESUMO

Extracellular deposition of Beta-amyloid peptide (Aß) is the main finding in the pathophysiology of Alzheimer's disease (AD), which damages cholinergic neurons through oxidative stress and reduces the cholinergic neurotransmission. Satureja bachtiarica is a medicinal plant from the Lamiaceae family which was widely used in Iranian traditional medicine. The aim of the present study was to investigate possible protective effects of S. bachtiarica methanolic extract on Aß induced spatial memory impairment in Morris Water Maze (MWM), oxidative stress and cholinergic neuron degeneration. Pre- aggregated Aß was injected into the hippocampus of each rat bilaterally (10 µg/rat) and MWM task was performed 14 days later to evaluate learning and memory function. Methanolic extract of S.bachtiarica (10, 50 and 100 mg/Kg) was injected intraperitoneally for 19 consecutive days, after Aß injection. After the probe test the brain tissue were collected and lipid peroxidation, Acetylcholinesterase (AChE) activity and Cholin Acetyl Transferees (ChAT) immunorectivity were measured in the hippocampus. Intrahipocampal injection of Aß impaired learning and memory in MWM in training days and probe trail. Methanolic extract of S. bachtiarica (50 and 100 mg/Kg) could attenuate Aß-induced memory deficit. ChAT immunostaining revealed that cholinergic neurons were loss in Aß- injected group and S. bachtiarica (100 mg/Kg) could ameliorate Aß- induced ChAT reduction in the hippocampus. Also S. bachtiarica could ameliorate Aß-induced lipid peroxidation and AChE activity increase in the hippocampus. In conclusion our study represent that S.bachtiarica methanolic extract can improve Aß-induced memory impairment and cholinergic loss then we recommended this extract as a candidate for further investigation in treatment of AD.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Encéfalo/efeitos dos fármacos , Memória/efeitos dos fármacos , Neurônios/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Satureja , Doença de Alzheimer/induzido quimicamente , Doença de Alzheimer/metabolismo , Peptídeos beta-Amiloides/farmacologia , Animais , Modelos Animais de Doenças , Masculino , Transtornos da Memória/induzido quimicamente , Degeneração Neural/patologia , Ratos Wistar
9.
Nat Prod Res ; 30(11): 1309-14, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26140544

RESUMO

The phytochemical investigation of Scilla persica HAUSSKN bulbs led to the isolation of a novel homoisoflavonoid that named Scillapersicene (1) and identified as 3-(3',4'-dihydroxybenzylidene)-8-hydroxy-5,7-dimethoxychroman-4-one along with five known homoisoflavonoids 2-6, whose structures were elucidated using HRFAB-MS, 1D and 2D NMR spectroscopic data. The known compounds were identified as 3-(3',4'-dihydroxybenzyl)-5,8-dihydroxy-7-methoxychroman-4-one (2), 3,9-dihydro-autumnalin (3), autumnalin (4), 3-(3',4'-dihydroxybenzylidene)-5,8-dihydroxy-7-methoxychroman-4-one (5) and scillapersicone (6). All compounds obtained, expect 2 and 4, showed strong cytotoxic activity against AGS cell line. The toxicity on AGS cell line was measured by 1, 3, 5 and 6 with IC50 values of 8.4, 30.5, 10.7 and 24.2 µM, respectively. In addition, the physico-chemical properties of these natural compounds were optimised using density functional method (B3LYP) with standard 6-311+G* basis set. These natural products have low-energy gaps between the first ionisation potentials and highest occupied molecular orbital. In conclusion, the low-energy gap could cause reason for cytotoxic activity of homoisoflavonoids.


Assuntos
Isoflavonas/toxicidade , Scilla/química , Produtos Biológicos/análise , Morte Celular/efeitos dos fármacos , Linhagem Celular , Elétrons , Humanos , Concentração Inibidora 50 , Isoflavonas/química , Isoflavonas/isolamento & purificação , Isoflavonas/farmacologia , Espectroscopia de Ressonância Magnética , Modelos Químicos , Estrutura Molecular , Raízes de Plantas/química
10.
J Arthropod Borne Dis ; 9(1): 104-15, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26114148

RESUMO

BACKGROUND: Ferulago carduchorum Boiss and Hausskn belongs to the Apiaceae family. This plant grows in west part of Iran that local people added it to dairy and oil ghee to delay expiration date and give them a pleasant taste. The aim of this study was to investigate the antioxidant, antimicrobial, acetyl cholinesterase inhibition, cytotoxic, larvicidal activities and composition of essential oil of F. carduchorum. METHODS: Acetyl cholinesterase (AChE) inhibitory, larvicidal activities and chemical composition of essential oil of F. carduchorum were investigated. Besides, antioxidant, antimicrobial and cytotoxic activities of essential oil were tested using DPPH, microdilution method and MTT assay, respectively. RESULTS: The major components of essential oil were (z)-ß-ocimene (43.3%), α-pinene (18.23%) and bornyl acetate (3.98%). Among 43 identified components, monoterpenes were the most compounds (84.63%). The essential oil had noticeable efficiency against Candida albicans (MIC= 2340 µg ml(-1)) and it was effective against Anopheles stephensi with LC50 and LC90 values of 12.78 and 47.43 ppm, respectively. The essential oil could inhibit AChE (IC50= 23.6 µl ml(-1)). The essential oil showed high cytotoxicity on T47D, HEP-G2 and HT-29 cell lines (IC50< 2 µg ml(-1)). CONCLUSION: The essential oil of F. carduchorum collected from west of Iran had anti-Candida, larvicidal and cytotoxicity effects and should be further investigated in others in vitro and in vivo experimental models.

11.
Fitoterapia ; 105: 107-12, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26086672

RESUMO

A new monoterpene-flavonoid, saturejin (3'-(2,5-dihydroxy-p-cymene) 5,7,4'-trihydroxy flavone) (4), together with twelve known flavonoids consist of two flavanonols (aromadendrin (8) and taxifolin (12)), two flavanones (naringenin (3) and 5,7,3',5'-tetrahydroxy flavanone (9)) and eight flavones (xanthomicrol (1), acacetin (2), cirsimaritin (5), 7-methoxy luteolin (6), apigenin (7), cirsilineol (10), diosmetin (11) and 6-hydroxyluteolin 7,3'-dimethyl ether (13)), were isolated from an ethyl acetate extract and identified for the first time in the dried aerial parts of Satureja khuzistanica Jamzad, an endemic medicinal plant traditionally used as dental anesthetic, oral antiseptic and anti-inflammatory among the nomadic inhabitants of southwestern Iran. The structures of these compounds were determined using the usual spectroscopic methods including 2D-NMR and MS analyses. Saturejin showed a significant ß-glucosidase inhibitory activity at concentration of 10 µg as well as positive antioxidant activity at the amount of 1 µg. These results could be correlated with the in vitro and in vivo anti-inflammatory, anti-oxidant and anti-diabetic properties reported from this medicinal plant. Similar activities were also described for some of the other isolated compounds.


Assuntos
Antioxidantes/química , Inibidores Enzimáticos/química , Flavonoides/química , Monoterpenos/química , Satureja/química , Antioxidantes/isolamento & purificação , Inibidores Enzimáticos/isolamento & purificação , Flavonoides/isolamento & purificação , Irã (Geográfico) , Estrutura Molecular , Monoterpenos/isolamento & purificação , Componentes Aéreos da Planta/química , Plantas Medicinais/química , beta-Glucosidase/antagonistas & inibidores
12.
J Food Sci Technol ; 52(6): 3169-86, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26028700

RESUMO

Nowadays, the presence of acrylamide in lots of fried and baked foods raises concerns due to its potential to cause toxicity and cancer in animals and human. Consequently, a number of papers have focused on evaluation of various chemicals in reduction of acrylamide in various food sources, as well as decreasing its related toxicities. In addition, plants are important sources of diverse metabolites demonstrating either possible effectiveness in acrylamide toxicity or reduction of acrylamide content in food sources. In this paper, we have criticized all relevant studies in terms of acrylamide mitigation from food by phytochemicals and antioxidants, and the influence of herbal medicines and phyto-pharmaceuticals on reduction of acrylamide toxicity in both animals and human.

13.
Pharmacogn Rev ; 9(17): 63-72, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26009695

RESUMO

Echinacea purpurea (Asteraceae) is a perennial medicinal herb with important immunostimulatory and anti-inflammatory properties, especially the alleviation of cold symptoms. The plant also attracted scientists' attention to assess other aspects of its beneficial effects. For instance, antianxiety, antidepression, cytotoxicity, and antimutagenicity as induced by the plant have been revealed in various studies. The findings of the clinical trials are controversial in terms of side effects. While some studies revealed the beneficial effects of the plant on the patients and no severe adverse effects, some others have reported serious side effects including abdominal pain, angioedema, dyspnea, nausea, pruritus, rash, erythema, and urticaria. Other biological activities of the plant such as antioxidant, antibacterial, antiviral, and larvicidal activities have been reported in previous experimental studies. Different classes of secondary metabolites of the plant such as alkamides, caffeic acid derivatives, polysaccharides, and glycoproteins are believed to be biologically and pharmacologically active. Actually, concurrent determination and single analysis of cichoric acid and alkamides have been successfully developed mainly by using high-performance liquid chromatography (HPLC) coupled with different detectors including UV spectrophotometric, coulometric electrochemical, and electrospray ionization mass spectrometric detectors. The results of the studies which were controversial revealed that in spite of major experiments successfully accomplished using E. purpurea, many questions remain unanswered and future investigations may aim for complete recognition of the plant's mechanism of action using new, complementary methods.

15.
Curr Cancer Drug Targets ; 15(1): 71-86, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25564255

RESUMO

Nanotechnology has revolutionized fundamental opportunities for higher specific drug delivery with minimum side effects. Since its inception, the goal of nanotechnology has been to advance effective and reliable systems for precise anti-cancer therapy and diagnosis. To accomplish this goal, bio-conjugation strategies of therapeutic agents loaded nanoparticles with monoclonal antibodies or their analogues have demonstrated a targeted approach both in vitro and in vivo. In this review, we primarily focus on the specific recognition of HER2 receptors of HER2 overexpressed tumor cells, and evaluate anti-HER2 monoclonal antibody as an effective tool for active targeting. Currently, a variety of nanoparticle systems are under both preclinical and clinical trials for targeting to HER2 positive breast cancer. Different nanotechnology scaffolds including liposomes, dendrimers, micelles, polymeric and inorganic nanoparticles that have higher flexibility for macromolecular synthesis and versatile functionalizing properties have been reviewed in this study. Continuing advances in anti-HER2 functionalized nanoparticles have good potential to lead to the development of nano-therapy against HER2 positive breast cancer.


Assuntos
Neoplasias da Mama/tratamento farmacológico , Terapia de Alvo Molecular/métodos , Nanopartículas/administração & dosagem , Receptor ErbB-2/efeitos dos fármacos , Sistemas de Liberação de Medicamentos , Feminino , Humanos , Nanotecnologia
16.
Curr Drug Discov Technol ; 12(4): 218-24, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26778084

RESUMO

Biomedical investigators use different methods including experimental animals, tissue, and cell cultures as well as computational simulations and clinical studies finding the ways to treat human diseases and disorders. All the mentioned procedures have their own advantages and disadvantages. For instance although animal models provide some drawbacks like difference in biokinetics parameters or extrapolation of results to human, they are more reliable than in vitro tests. The disadvantage of the in vitro procedures is that they are mostly performed on cancerous cell lines that have a substantially abnormal function. Furthermore, although in vitro models are fruitfully used in biological fields, finding an end point, the initial aim of chemical attack, and extrapolation of the effects to the human are some real weaknesses. Absence of biokinetics in in vitro methods may lead to a misinterpretation of the data. The present review has criticized the pros and cons of both methods, especially in the fields of pharmacology, toxicology, and medical sciences.


Assuntos
Estudos Clínicos como Assunto , Avaliação Pré-Clínica de Medicamentos , Animais , Simulação por Computador , Humanos , Técnicas In Vitro , Modelos Animais
17.
Inflamm Allergy Drug Targets ; 14(2): 67-76, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26728775

RESUMO

Uranium is the heaviest metal known as nuclear fuel, and employed in the production of glass tinting compounds, ceramic glazes, gyroscope wheels, chemical catalysts and X-ray tube targets. Inhalation and ingestion are two of the most usual ways of exposure. Uranium may be released into drinking water through the mining leading to contamination. Uranium is able to damage the DNA by generation of free radicals and acting as a catalyst in the Fenton reactions causing oxidative stress. In fact, reproductive system contains high amount of polyunsaturated fatty acids, and therefore it is highly vulnerable to reactive oxygen species (ROS) and sensitive to uranium toxicity. Toxic effects of uranium are generally reported through different mechanisms of action including inflammation, degeneration of testis, vacuolization of Leydig cells, spermatocytes necrosis, and oocyte dysmorphism. The present article provides a comprehensive review of the recent findings mostly about the molecular and biochemical toxicity of uranium on the reproductive system.


Assuntos
Intoxicação por Metais Pesados , Intoxicação/etiologia , Lesões por Radiação/etiologia , Reprodução/efeitos dos fármacos , Reprodução/efeitos da radiação , Urânio/toxicidade , Animais , Dano ao DNA , Feminino , Humanos , Células Intersticiais do Testículo/efeitos dos fármacos , Células Intersticiais do Testículo/metabolismo , Células Intersticiais do Testículo/patologia , Células Intersticiais do Testículo/efeitos da radiação , Masculino , Metais Pesados/metabolismo , Oócitos/efeitos dos fármacos , Oócitos/metabolismo , Oócitos/patologia , Oócitos/efeitos da radiação , Estresse Oxidativo/efeitos dos fármacos , Estresse Oxidativo/efeitos da radiação , Intoxicação/metabolismo , Intoxicação/patologia , Intoxicação/fisiopatologia , Lesões por Radiação/metabolismo , Lesões por Radiação/patologia , Lesões por Radiação/fisiopatologia , Medição de Risco , Fatores de Risco
18.
J Diabetes Metab Disord ; 13(1): 114, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25506585

RESUMO

BACKGROUND: Natural α-amylase inhibitors of herbal origin are an attractive therapeutic approach to control post-prandial hyperglycemia via reducing the glucose release from starch and delaying carbohydrate absorption. These compounds are able to inhibit the activity of the carbohydrate hydrolyzing enzymes in the small intestine and potentially useful in control of diabetes. The enlarged Lamiaceae (Labiatae) family contains about 6,900 to 7,200 species worldwide and many species of this family possess medicinal properties and have been used traditionally for treatment of chronic illnesses including diabetes. METHODS: In the present study particular species of Labiatae family from the genera, Phlomis, Satureja, Salvia, Scutellarua, Stachys and Hymenocrater, which are growing wildly in Iran, selected to evaluate for possible in vitro α-amylase inhibitory activity, compared to acarbose as a positive control. RESULTS: The inhibitory activities of all the herbal extracts were varied from 1.9 to 18.6 (IC50, µg/mL). Additionally, the ethyl acetate extract of P. bruguieri (IC50 = 1.9 µg/mL) and the butanol extract of P. persica (IC50 = 3.6 µg/mL) exhibited the lowest IC50 values among all the species as the most potent herbal extracts, while the inhibitory activity of S. sahendica and S. macrosiphon (ethyl acetate extracts) as well as P. caucasica (butanol extract) on α-amylase enzyme was observed as weak and did not reach at least to the 50% of the enzyme inhibition level. CONCLUSIONS: Taking together, P. bruguieri and P. persica among the Phlomis species can be the promising sources of α-amylase inhibitors. However, P. rigida, S. bizantina and H. bituminosus that exhibited moderate activity can be stand on second level of interest.

20.
Daru ; 22: 78, 2014 Nov 28.
Artigo em Inglês | MEDLINE | ID: mdl-25429772

RESUMO

BACKGROUND: Phthalate, esters of phthalic acid, are mainly applied as plasticizers and cause several human health and environment hazards. The essential oils of Achillea species have attracted a great concern, since several biological activities have been reported from varieties of these medicinal species. On the other side, due to the problems regarding the waste disposal in developing countries, phthalate derivatives can easily release from waste disposal to the water and soil resulting in probable absorption and accumulation by medicinal and dietary plants. As a matter of fact, although the toxicity of phthalate derivatives in human is well-known, food crops and medicinal plants have been exposing to phthalates that can be detected in their extracts and essential oils. Achillea tenuifolia (Compositea) is one of these herbaceous plants with traditional applications which widely growing in Iran. FINDING: The plant root was subjected to hydro-distillation for 4 h using Clevenger type apparatus to obtain its essential oil before and after acid treatment. Both of the hydro-distilled essential oils were analysed by GC-MS method resulted in recognition of their constituent. Phthalate contamination as (1, 2-benzenedicarboxylic acid, bis (2-methylpropyl) ester (5.4%) and phthalic acid (4.5%), were identified in the first and second extracted oils, respectively. CONCLUSION: As a warning, due to the potential role of phthalates to cause reproductive toxicity, disturb of endocrine system and causing cancers, medicinal plants have to be considered through quality control for detection of these compounds.


Assuntos
Achillea , Óleos Voláteis/química , Ácidos Ftálicos/análise , Óleos de Plantas/química , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Óleos Voláteis/efeitos adversos , Ácidos Ftálicos/efeitos adversos , Fitoterapia , Óleos de Plantas/efeitos adversos , Raízes de Plantas , Plantas Medicinais , Medição de Risco
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