جستجوی مقالات مرتبط با کلیدواژه « thymol » در نشریات گروه « پزشکی »

Overweight and obesity are defined as abnormal or excessive fat accumulation that presents a risk to health. This study investigated the influence of thymol on obesity, liver enzymes and adipose tissue in mice fed a high fat diet (HFD).

Experimental: 

Male NMRI mice were divided into two groups; the control group that given normal rodent diet and obese group that received HFD for 8 weeks. The obese animals were divided into 3 groups: one group received thymol orally (12 mg/kg body weight) for a period of 56 days. Obese group didn't receive any treatment and the sham groups received thymol (12 mg/kg body weight) dissolved in grape seed oil. Alteration in body weight gain and serum biochemical markers were assessed and fat tissue was fixed in formalin in order to prepare microscopic slides. Finally, body weight, liver enzymes (ALT and AST), TNF-α‚ adiponectin‚ total antioxidant (TAC) and leptin levels were measured in obese mice compared with control mice.

Thymol treatment resulted in increased serum adiponectin and TAC level, while significantly reduced TNF-α level (P<0.05). The leptin level decreased in HFD mice, but it was not significant (P>0.05). Serum ALT and AST levels were significantly decreased (P<0.05) in HFD mice, compare with control. The diameter of adipose cells were decreased in thymol-supplementation mice (P<0.001). This combination does not lead to significant reduction in body weight, but it can help to prevent weight gain.

Recommended applications/industries:

 The thymol was able to prevent HFD induced obesity in mice and attenuation of inflammation markers.

Different medicinal properties of thyme plant, anticancer effects of green synthesis of gold nanoparticles and low survival of patients with pharyngeal cancer are the main reasons for this research on the pharyngeal cancer FaDu cell line.

Following preparation of thyme extract, green synthesis was performed on AuCl3 gold salt to obtain nanomedicine. Infrared and X-ray diffraction spectroscopic tests along with scanning and transmission electron microscopy was carried out for optimization of the synthesized nanomedicine. The viability of FaDu cells was assessed by MTT after 24-, 48-, and 72-hours treatment with different concentrations of the nanomedicine and LC50 was determined. Cell apoptosis was measured by flow cytometry.  

The mean survival of FaDu cells after treatment with different concentrations of gold nanomedicine at each of the three time points was significantly lower compared to untreated cells (P<0.001). The LC50 value of the nanomedicine following 48 hours of exposure was approximately 40 μg/ml. The rate of early and late apoptosis in the treated cells was calculated as 37.5%.

The results of the present study confirmed that gold nanoparticles synthesized from thyme extract have cytotoxic and apoptosis induction effects on FaDu pharyngeal cancer cells. Therefore, further study on the use of this nanomedicine in the treatment of pharyngeal malignancy is recommended

Cancer is one of the most prominent causes of death worldwide. Ocimum gratissimum Linn. (Lamiaceae) leaves are used in many countries as a spice or medicine. 

This study investigated the essential oil of the O. gratissimum leaves and its major constituent, thymol, for cytotoxic activity against breast (AU565) and cervical (HeLa) cancer cell lines. 

Preliminary screening was carried out using bench-top assay methods for cytotoxicity involving the use of tadpoles of Raniceps raninus (10-40 μg/mL) and brine shrimp of Artemia salina (10-1000 μg/mL) and growth inhibition using radicle of Sorghum bicolor seeds (1-30 mg/mL). Antiproliferation was verified by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Chromatographic separation of the oil resulted in fractions and sub-fractions, which were also subjected to biological testing. The components of the oil and active subfraction were further identified by gas chromatography-mass spectrometry (GC-MS). 

Remarkable cytotoxic activities were seen against R. raninus tadpoles and A. salina nauplii. Growth inhibitory activity on S. bicolor seed radicles was produced concentration-dependent. The subfraction possessed greater cytotoxic activity on the cell lines than the oil, with inhibitory action of +85.07% and +29.20% against AU565 and HeLa cells, respectively. Thymol was the major constituent of the oil (22.49%) and increased to 94.31% in the subfraction. 

O. gratissimum volatile oil showed little inhibitory activity against AU565 and no inhibition on HeLa cells. However, its major component, thymol, demonstrated high potency, especially on the AU565 cell line, making it a good candidate for further studies.

There is a rising trend in the use of herbal stem cell remedies among the populace due to the belief that such remedies have all-encompassing health benefits, and without side effects. However, there is little or no scientific data reported on their safety profile. This study addressed the toxicological effects of STC-30, one of the popular polyherbal stem cell remedies used in several countries of the world including Nigeria, Ghana, Australia, among others.

The inhibitory activity of thymol and the nano-preparations were evaluated qualitatively versus Metronidazole against T. vaginalis in TYI-S33 culture medium. The live T. vaginalis parasites were counted on a hemocytometer, the inhibition rate was assessed and the data analyzed statistically.

Thymol and its two nanopreparations at varying concentrations inhibited T. vaginalis in culture after 24, 48, or 72 hours of incubation. The inhibition of T. vaginalis was also achieved in culture with Metronidazole at 65 µg/ml.

The percent inhibition of T. vaginalis by thymol and its nanopreparations depended on the duration of incubation and the concentration. Thymol and its nanoliposome preparation showed a lower inhibitory effect (IC50) on T. vaginalis than that of the thymol nanoparticles after 24 or 48 hours of treatment. However, the efficacy of the three thymol forms did not significantly differ after 72 hours of treatment.

Thymol has an antiprotozoal effect. Nanoparticulate systems are useful carriers for both small and large drug molecules, which can protect them from some chemical and biological damages as well as target drug delivery to specific organs or receptors. In this work, the nano-liposomal system and solid lipid nanoparticles loaded by thymol were prepared and the effectiveness of them were evaluated on Leishmania major promastigotes. Several formulations of nano-liposomes and solid lipid nanoparticles were prepared, and the amount of thymol loading, in-vitro release profile, particle size, and zeta potential were evaluated. Finally, the best formulations were serially diluted and incubated for 24, 48, and 72 hours on Leishmania major promastigotes, which cultured on Novy–MacNeal–Nicolle medium, and the results were analyzed. The highest loading of thymol in nano-liposomes (92%) was seen in the formulations made with phosphatidylcholine (Called L3), and among the solid lipid nanoparticles, the formulation prepared with glycerol monostearate (S1) had the most entrapment efficiency of thymol (87%). These formulations were selected to evaluate the release rate of thymol. The results showed that S1 has a slower release rate than L3; this may be due to the presence of Glycerol monostearate in solid lipid nanoparticles structure. The best formulations, L3 and S1, were chosen for anti-Leishmaniosis assessment; which showed that all three forms of free thymol, nanoliposomes, and solid lipid nanoparticles inhibited Leishmania major. The half maximal inhibitory concentration (IC50) of free thymol, nanoliposome, and solid lipid nanoparticles for a 24-hour incubation are 7.8, 62.5, and 125, respectively, which decrease to 7.8, 7.8, and 15.6 for 48 hours and 7.8, 0.49, and 0 for 72 hours of incubation. Thymol has a significant effect on the inhibition of Leishmania major promastigotes and usage of thymol in the form of liposomes or solid lipid nanoparticles can sustain the drug release and have a lower IC50 during the longer incubation time.

Infection is one of the significant challenges in medical implant-related surgeries. Despite systemic antibiotic therapies, bacterial growth after implantation may cause implant failure. Nowadays, unlike the systemic therapy, local controlled release of antibiotic agents is considered an effective approach for the prevention of implant-related infections. The present study aimed to develop a niosomal nanocarrier incorporated into fibroin films for local and continuous delivery of thymol, a natural plant-derived antimicrobial agent for preventing infections caused by implant-related.

Niosomes containing thymol were prepared by thin-film hydration technique. Thymol sustained release from the prepared films was assessed for 14 days. Antibacterial activities of the synthesized films were also evaluated by the agar diffusion technique against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus.

The release behavior from the niosomal thymol films showed a sustained manner, in which the amount of the released thymol reached 40% after 14 days. The films containing thymol with and without niosome showed a significant viability against L929 fibroblast cells compared to other groups after 24 and 48 h, using MTT assay. Also, samples exhibited potent antibacterial activity against Gram-negative and Gram-positive bacteria.

The results of this study demonstrate that the niosomal thymol-loaded fibroin film is a promising candidate for the controlled release of thymol and prevention of implant-related infection.

Several pharmacological effects have been attributed to thymol. However, limitations such as low solubility in water, low bioavailability, and high volatility have limited its use.

The present study aimed to prepare and characterize thymol-loaded solid lipid nanoparticles (SLNs) to improve the efficacy of thymol.

Thymol-loaded SLNs were characterized by atomic force microscopy (AFM), differential scanning calorimetry (DSC), and Fourier transformed infrared spectroscopy (FT-IR). Cytotoxicity study and hemolysis assay were also performed.

The in vitro drug release showed a sustained manner. Also, SLNs loaded with thymol showed higher cytotoxicity than free thymol, and the hemolysis results indicated the blood biocompatibility of SLNs.

As nanocarriers, SLNs can open a new avenue for improving the efficacy of thymol in cancer treatment.

Zataria multiflora Boiss L. (Z. multiflora) is belonged to the Lamiaceae family, formerly used for culinary and medicinal purposes. Various pharmacological effects of Z. multiflora such as bronchodilation, effect on lung inflammation, cold and gynecology disorders have been reported. A literature search was performed in the following databases: Science Direct, PubMed, Scopus and Google Scholar. The keywords including “Zataria multiflora Boiss.”, “carvacrol”, “thymol”, “linalool”, “smooth muscle” and “relaxant effects” were searched. The relaxant effects of Z. multiflora and its ingredients on different smooth muscles including trachea, vascular, gastrointestinal and urogenital smooth muscle were demonstrated. The relaxant effect of Z. multiflora on smooth muscles could be of therapeutic importance, such as bronchodilation in obstructive respiratory disorders, vasodilation in hypertension and reliving digestive or urogenital disorders. The possible mechanisms of the relaxant effect of Z. multiflora and its components, mainly carvacrol on smooth muscle such as inhibitory effect on histamine (H1) and muscarinic receptors, calcium channel blocking effects and stimulatory effect on the beta adrenergic receptor were shown.

We have reported that thymol and carvacrol can improve cognitive abilities in Alzheimer Disease (AD) rat models. However, the mechanism of their action is not yet fully understood. Recently, our in vitro results suggested that PC12 cell death induced by Aβ25-35 can be protected by thymol and carvacrol via Protein Kinase C (PKC) and Reactive Oxygen Species (ROS) pathways. So, we hypothesize that the mechanisms of thymol and carvacrol in improving the learning impairment in the AD rat model may be related to their effects on PKC. So, the activity of PKC and protein expression levels of PKCα were examined in the hippocampal cells of the AD rat model.

To examine the thymol and carvacrol effects, we performed a behavioral test in AD rat models induced by Aβ25–35 neurotoxicity. To access the underlying mechanism of the protective effects, western blotting was performed with antibodies against PKCα. We also measured the PKC activity assay by Elisa. Histopathological studies were carried out in the hippocampus with Hematoxylin and Eosin (H&E) staining. 

The escape latency increased in Aβ-received rats compared to the control group, and thymol and carvacrol reversed this deficit. Furthermore, these compounds could enhance the PKC activity and increase the PKCα expression ratio. Moreover, H&E staining showed that Aβ caused shrinkage of the CA1 pyramidal neurons. However, thymol and carvacrol treatments could prevent this effect of Aβ peptides.

This study suggests that Amyloid-Beta (Aβ) results in memory decline and histochemical disturbances in the hippocampus. Moreover, these results revealed that thymol and carvacrol could have protective effects on cognition in AD-like models via PKC activation.

Background &

The genus Satureja has 38 species distributed throughout the Mediterranean Area, Caucasus and West Asia. Satureja Mutica and Satureja spicigera is two Iranian native species that are distributed in the North of Iran. Essential oil (EO) of Satureja specious was used to some medicinal, food and industrial purposes. The aim of this study was to determine the chemical compounds of EO in Satureja mutica and Satureja spicigera under dry farming. Experimental: In early April, before the effective rain fall, the seedlings were transferred to the main land in mid-March. In the %50 flowering stage, plants were harvested and 100 g of plant dried powder used for EO extraction. The EO was extracted by water distillation method and chemical components of essential oils were identified and subsequently characterized using GC and GC/MS techniques.

The EO percent in S. spicigera was 2.52% in first year and 3.08% in second years. The EO percent of S. mutica was 2.04% in first year and 2% in second year. In creeping savory EO, thirteen compounds were identified that were formed the major constituents of EO (about 98.74% in first year and 97.53% in second year). The main compounds of essential oil (more than 5%) were thymol (28.60- 28.96%), carvacrol (23.18- 24.47%), ρ-cymene (21.00- 24.25%) and γ-terpinene (18.57-13.05%). In white savory EO, nine different chemical compounds were identified which made up more than about 95.32% of EO content in the first year and 97.48% in the second year. The major compounds of EO were Thymol (48.25-48.60%), γ-terpinene (20.84- 21.89%), ρ-cymene (12.34- 12.61%) and Carvacrol (6.71- 6.95%) respectively.Recommended applications/industries: Thymol and carvacrol contents in savory essential oil are the two important factors in pharmaceutical properties of savory EO. White and Creeping Savory can be used to pharmaceutical and food industries. Also we recommended the increase of EO content, thymol and carvacrol compounds in white and creeping savory using different cropping and breeding methods for further studies.

Thyme is widely used in the food and pharmaceutical industry as an antimicrobial and antioxidant aromatic component, mainly due to its essential oil composition especially the presence of Thymol. In this research, the essential oil of Thymus vulgaris collected from Hamedan was obtained by hydro-distillation method. The response surface method was employed to determine the optimal values of the evaluated factors. The proposed optimal conditions were 1.5 to 2.5 hours for 60 to 80 grams of sample per 100 ml. The optimum extraction time of essential oil from the aerial parts and leaves of thyme were 2.5 hours for 77.63 grams and 2.5 hours for 64.66 grams per 100 ml respectively. The results of experiments in optimum conditions showed that the highest amount of Thymol was found in the essential oil obtained from aerial parts of thyme.

Long-term surge of heart loads causes cell hypertrophy. Left ventricular hypertrophy is an adaptive response of the heart to pathological stimuli such as hypertension. B-cell lymphoma 2 (Bcl-2) family members play an essential role in this process regulation. This study aimed to evaluate the effect of thymol on the transcription level of Bcl-2 family factors in the rat model of left ventricular hypertrophy.

Male Wistar rats were divided into four groups: 1- Control 2-Untreated hypertrophy (H), 3 and 4 groups which received 25 and 50 mg/kg/day of thymol (H + Tym25 and H + Tym50 groups, respectively). Hypertrophy was induced by abdominal aortic banding, and the real time polymerase chain reaction technique was used for gene expression.

Data showed that in the H group, the mRNA level of the BAD was increased significantly (p ˂ 0.001). However, the transcription level of BAX was increased in the H and H+Tym25 compared with the control group. In the H + Tym50 group, BAX mRNA level decreased significantly compared to the H group (p ˂ 0.05).

Our findings demonstrated that the expression rates of the antiapoptotic factor, Bcl-2, was significantly increased in the H group (p < 0.01) and thymol-treated hypertrophy groups (p < 0.001). Interestingly, the upregulation of Bcl-2 mRNA was statistically significant in the H+Tym50 group compared with H and H + Tym25 groups (p < 0.01). The results showed that thymol could protect heart hypertrophied by increasing the expression of anti-apoptotic factors.

Mercuric chloride is highly toxic once absorbed into the bloodstream, especially the kidneys in which it is collected. Mercury chloride increases hydrogen peroxide and enhances the destruction of protective enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GPX), leading to oxidative stress. Besides, thymol has anti-oxidant effects and can increase the activity of SOD and GPX. This study aims to evaluate the efficacy of thymol on mercury chloride-induced toxicity.

In this study, 30 rats, consisting of 6 groups of 5, were used. Control group receiving a single dose of 0.5 mg/kg mercuric chloride for 15 days, third, fourth, and fifth group received intraperitoneal injection of mercuric chloride at a dose of 0.5 mg/kg for 15 days plus thymol at a dose of 10, 30, 50 mg/kg. The sixth group received mercuric chloride at a dose of 0.5 mg/kg for 15 days plus thymol at 30 mg/kg per day for ten days.

Results showed a significant difference in the activity of catalase enzyme in kidney tissue samples test. According to the results of SOD, there is a significant difference between the group of corn oil and the group of mercury chloride and between the group of mercury chloride and the group that receives thymol at a dose of 10, 30, 50 mg/kg (p ≤ 0.05).

It can be concluded that mercury chloride-induced kidney toxicity and thymol have anti-oxidant protective effects for SOD and GPX.

Hepatotoxicity induced by Co-amoxiclav has been indicated in multiple studies. Thymol is the main constituent of the Thymus vulgaris essential oil that has antioxidant properties. Even though thymol can exhibit antioxidant activity in vivo models, there is a lack of evidence about the thymol’s effectiveness in drug-induced liver injury. Thus, the present study was conducted to explore the thymol anti-hepatotoxic effects.

Thirty male rats were randomly divided into five groups of six. The control group received corn oil (0.25 ml/100 g body weight). CoA group was given only co-amoxiclav in doses of 10 mg/kg daily by gastric tube. CoA+T50, CoA+T150, and CoA+T300 groups orally received
Co-amoxiclav at the same dose as the second group along with thymol at a daily dose of 50, 150, and 300 mg/kg for 7 consecutive days. At the termination of the treatment, all animals fasted overnight, and then blood samples were collected to determine alanine transaminase, aspartate transaminase, alkaline phosphatase, glutathione S-transferases, and bilirubin.

Administration of thymol at the dose of 300 mg/kg with co-amoxiclav resulted in a significant decrease in direct and total bilirubin levels. Findings also revealed that the concomitant administration of thymol at the 150 mg/kg dose caused a significant reduction in the total bilirubin level. Additionally, the concomitant administration of thymol at the doses of 150 mg/kg and 300 mg/kg resulted in a significant reduction of alanine transaminase, aspartate transaminase, and alkaline phosphatase serum activities along with increased plasma Glutathione S-transferase activity compared to co-amoxiclav group.  

Administration of thymol can cause a significant ameliorative effect against co-amoxiclav-induced hepatotoxicity in rats.

Natural isopropyl cresols, such as thymol and carvacrol, have been known to have antifungal activities.

The current study aimed to investigate the anti-adherence and antifungal activities of thymol, carvacrol, fluconazole, and voriconazole against oral isolates of Candida albicans (C. albicans), C. glabrata, and C. krusei.

The susceptibility assay for the test compounds was performed using the disk diffusion method against all Candida isolates. Also, anti-adherence activity was examined using a rapid and highly reproducible 96 well microtiter-based method.

Both natural phenols and antifungal drugs revealed various efficacies against studied Candida species. The susceptibility to fluconazole and voriconazole were 100% for C. albicans, 50% and 90% for C. glabrata, and 0% and 100% for C. krusei isolates, respectively. The mean diameter of the inhibition zone was greater for thymol than carvacrol in C. albicans (19.89±0.80 mm versus 17.05± 0.61 mm), C. glabrata (18.87 ± 0.71 mm versus 15.77 ± 0.57 mm), and C. krusei (15.11 ± 0.91 mm versus 13.91 ± 1.04 mm) isolates tested. Thymol showed more effective inhibition on adherence of all Candida species than other treatments. The mean relative adherence ratios for C. albicans, C. glabrata, and C. krusei were 0.50, 0.60, and 0.64, respectively.

This study demonstrated significant inhibitory properties of thymol and carvacrol on the adherence and growth of azole susceptible- and -resistant Candida isolates. Also, thymol was more effective for preventing the adherence of yeast cells to polystyrene in comparison to carvacrol.