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

A gastric ulcer is a mucosal lesion of the stomach that may occur after taking nonsteroidal anti-inflammatory drugs such as aspirin, especially in cardiovascular diseases. The aim of this study was to evaluate the cytoprotective effects of the aqueous extract of oak (Jaft) against the mucosal damage effects of aspirin.

Seventy-two female Wistar rats weighing 200‒240 g were prepared and divided into 6 groups. Groups I, II, and III received the Jaft extract at doses of 250 mg/kg/d, 500 mg/kg/d, and 750 mg/kg/d, respectively, and Group IV received omeprazole at a dose of 200 mg/kg/d. Groups V (patient’s control) and VI (healthy control) both received saline (0.9%) at 1 mL/kg/d . Mice were given aspirin (200 mg/kg/d) for inducing the gastric ulcer. After 14 days, they were anesthetized with ether, their stomachs were removed, and the blocks of tissue were prepared. The tissues were stained using the hematoxylin-eosin (H&E) dye and analyzed by the Olympus light microscope and OLYSIA software. Finally, IBM SPSS 26.0 software was used for statistical analysis of the data.

The means ± standard deviation (SD) of the mucosal thickness in groups taking the Jaft extracts (250, 500, and 700 mg) decreased compared to the aspirin group (P < 0.05). In addition, the mean ± SD of the mucosal gland thickness and mucosal folds in group V (with aspirin) decreased compared to the 250, 500, and 700 extract groups (P > 0.05). The epithelial cell destruction, edema, venous congestion, and destruction of the capillaries of the mucosal and sub-mucosal areas in the extract groups decreased compared to the V group. Likewise, the number of mucosal cells in the gastric gland and the size of gastric parietal cells in the extract groups decreased compared to the V group.

This study generally elucidated the cytoprotective effect of the Jaft extract in the mouse model of gastric ulcer.

Management of bleeding is among the major issues in medicine, particularly during surgery.

This study investigated the effects of Pomegranate peel and flower, Myrtle, Quercus fruit, and Rhus coriaria L extracts on bleeding control in rats.

In this experimental study, 32 male Wistar rats (weighing 200 - 250 g, 8-10-month-old) with free access to sufficient water and food, were randomly divided into four groups: (a) the topical application of the extracts on tail wounds (bleeding time (B.T.) measurement); (b) intraperitoneal injection of the extracts (measurement of prothrombin time (P.T.) and partial thromboplastin time (PTT) in the blood taken from the heart); (c) control group 1 (B.T. measurement on tail wounds without the topical application of the extracts); and (d) control group 2 (no intraperitoneal injection of the extracts, P.T. and PTT measurement in blood drawnfrom the heart). The animals in all groups received the same care and were kept under standard laboratory conditions, 12:12 h light/dark cycles, and a temperature of 23 ± 2.0°C. The data were analyzed by the one-way ANOVA and Tukey’s post-hoc tests.

The mean of B.T. in the control group, 3.57 ± 0.20 s, was significantly higher than that in the intervention group (1.56 ± 0.13 s) (P < 0.001). The mean of P.T. in the control group was not significantly different from that in the intervention group (P = 0.499). The mean of PTT in the control group (18.2 ± 24.82 s) was significantly shorter than that in the intervention group (38.00 ± 14.49 s) (P = 0.006).

Considering the acceptable coagulant effects of the extracts of Pomegranate peel & flower, Myrtle, Quercus fruit, and Rhus coriaria L. compared to the control group, it can be concluded that these extracts can be suitable adjuvant drugs for controlling bleeding. Although the coagulant effects of these extracts have been mentioned in many traditional medicine texts, human tests are required to reject or confirm their clinical effects.

Quercus brantii galls (QBGs) are well-known in Iranian traditional medicine for treating various diseases. The aim of study was to assess the acute and repeated oral toxicity of the hydroalcoholic extract of QBG in female rats.

The ethanolic extract of QBG was administered in rats by gavage in both acute and repeated dose models. In the acute section of the study, a single oral dose of 2000 mg/kg was administered to female rat which were observed for physical symptoms and behavioral changes for 14 days. In the repeated dose toxicity study, the QBG extract (50, 500, and 1000 mg/kg/day) was administered for a period of 28 days to rats. On 28th day of experiment, blood sampling of animals was done for hematological and biochemical analysis and then sacrificed for histopathological examination of the harvested tissues (liver, heart, kidney, lung, spleen, stomach, ovary and uterus).

A single oral administration of the QBG extract (2000 mg/kg) did not produce mortality or significant behavioral changes during 14 days of observation. In repeated oral toxicity models, the extract significantly increased (P<0.05) the levels of mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), thyroid-stimulating hormone (TSH) and significantly decreased the levels of triiodothyronine (T3) and thyroxin (T4) in 500 and 1000 mg/kg dosage. The histopathological studies showed the absence of toxic effects of QBG (50 mg/kg dosage) and revealed evidence of microscopic lesions in the liver, kidney, stomach, heart, spleen, lung, uterus, and ovary in the 500- and 1000-mg/kg groups. 

The results indicate that the oral acute toxicity of QBG extract was of a low order with LD50 being more than 2000 mg/kg in rats. In addition, slight tissue damage was observed in some tissues in the 500 and 1000 mg/kg groups. It was found that prolonged use at higher doses i.e. 500 mg/kg/day of QBG extract should be avoided.

Episiotomy is one of the most common surgical interventions performed to facilitate delivery. Anti‑inflammatory and antibacterial effects of Persian oak (Quercus persica) and henna (Lawsonia inermis) have been proved in previous studies. The aim of this study is to evaluate the effect of Q. persica and L. inermis ointment on episiotomy wound healing in primiparous women and comparing it with placebo group.

This was a double‑blind clinical trial conducted on 160 primiparous women who underwent episiotomy. The cases were randomly selected and divided into four groups of forty patients including control, placebo, those who consume topical henna, and those who consume topical Persian oak ointment. Pain and recovery assessment was done at baseline and 7th, 10th, and 14th days after birth and measured by Redness, Edema, Ecchymosis, Discharge, and Approximation (REEDA scale) and patients’ pain intensity was also measured by a visual analog scale (VAS). The collected data were analyzed using Chi‑square test, one‑way ANOVA, and repeated measures ANOVA test by SPSS (version 22).

The results revealed that according to the reduced score of REEDA till the 14th day after the delivery, the wound healing in the henna group and the oak group (−2.58 ± 0.29 and − 2.04 ± 0.31, respectively) was higher than the control and placebo groups (−1.62 ± 0.34 and − 1.95 ± 0.32, respectively) (P < 0.05). Furthermore, on the 14th day, the mean VAS score was not significantly different between henna and oak groups (henna group: 2.58 ± 0.25 and oak group: 2.23 ± 0.18); however, both intervention groups had a significant difference with the placebo and control groups (P < 0.05).

The findings showed that the use of henna and oak ointment improves episiotomy wound healing process, so it is recommended for primiparous women.

Low Glycemic Index (GI) and high Satiety Index (SI) foods have been associated with the decreased risk of chronic diseases and obesity.

The present study examined the effect of oak flour on GI, Glycemic Load (GL), and SI of white bread.

This randomized crossover trial was conducted at Ahvaz University of Medical Sciences, Ahvaz, Iran, during the year 2017. To determine the GI, 10 healthy subjects consumed three bread types (white bread, bread containing 25% oak flour, and bread containing 50% oak flour) and reference food (glucose) containing 50 g of carbohydrates on separate occasions. Finger-prick blood samples were collected at fasting (0 min) and at 15, 30, 45, 60, 90, and 120 min after meal consumption. To determine the SI, 20 healthy individuals consumed 240 kcal portions of test bread types (white bread, bread containing 25% oak flour, and bread containing 50% oak flour) on separate occasions. The satiety ratings were collected at fasting and every 15 min for over 2 h after food ingestion to evaluate the SI.

There were no significant differences in the mean of blood glucose Incremental Areas Under the Curve (IAUC) between the test bread types (white bread: 2,883.2 ± 353.7 vs. 25% oak flour bread: 3,163.1 ± 214.7 vs. 50% oak flour bread: 3,245.1 ± 255.9) (P > 0.05). Also, no significant differences were observed between the mean of bread GIs (P > 0.05). The satiety IAUCs of both oak bread types (25% oak flour bread: 377.17 ± 59.83, 50% oak flour bread: 427.87 ± 55.46) were significantly greater than that of white bread (248.55 ± 46.45) (P < 0.001). The SI of both oak bread samples (25% oak flour bread: 202.48 ± 7.92, 50% oak flour bread: 266.25 ± 11.66) was significantly greater than that of white bread (100) (P < 0.001).

The addition of oak flour did not modify the GI; however, it increased the SI of white bread and created a greater feeling of satiety.

Vaginal infections are one of the most common reasons a woman visits a gynecologist. The increased resistance to conventional antibiotics is one of the main reasons for searching and developing new antimicrobial agents, especially those of natural origin. In traditional Persian medicine, the gall of Quercus infectoria has been claimed to eliminate vagina and cervix from excessive discharge. So, the aim of the present study was to evaluate the antimicrobial activity of ethanolic extract of Quercus infectoria gall as well as its active constituent, gallic acid, against some vaginal pathogens. In this study, the ethanolic extract of Quercus infectoria gall was obtained by maceration and standardized based on amount of gallic acid. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of this extract as well as its active compound, gallic acid, were determined against Candida spp., Gardnerella vaginalis, Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae, Trichomonas vaginalis and Lactobacillus acidophilus. The results demonstrated remarkable activity of ethanolic extract of Quercus infectoria gall against investigated pathogens with MIC and MBC in the range between 0.125 mg/ml and 16 mg/ml. The most inhibitory and bactericidal activity was observed on Streptococcus agalactiae and Staphylococcus aureus. The effects of gall dried ethanolic extract on Trichomonas vaginalis showed 100 % inhibition of the parasitic growth with concentration of 800 µg/ml after 24 h incubation. The antimicrobial and anti-trichomonas activity of extract was more than gallic acid. It seems that ethanolic extract of Quercus infectoria gall could inhibit the growth of vaginal pathogens. Further preclinical and clinical studies are required to confirm the efficacy of this natural extract in vaginitis.

Leishmania major is a flagellated parasitic protozoan that causes cutaneous leishmaniasis. Pentavalent antimony compounds are considered the first-line drugs in the treatment of cutaneous leishmaniasis. However, the use of these drugs is associated with numerous limitations and side effects. Therefore, there is a need for herbal and natural alternatives for these compounds with fewer side effects. In this study, we evaluated the in vitro activity of methanol extract of Quercus infectoria (oak galls) against promastigotes and amastigotes of L. major.

In this experimental study, the effect of 10, 100, 500 and 1000 µg/ml of methanolic extract of oak galls and 100, 500, 1000 and 10000 µg/ml of Glucantime was evaluated against L. major promastigotes using direct cell counting and MTT assay. Moreover, the effect of different concentrations of the extract and Glucantime was investigated on the mean number of amastigotes in macrophages after 24 and 48 hours. Data were analyzed using SPSS 16 and one- way analysis of variance.

The half-maximal inhibitory concentration of the oak gall extract and Glucantime was 75 µg/ml and 221 µg/ml after 24 hours, respectively. After 24 hours, the mean number of amastigotes per macrophage was lowest at concentrations of 1000 µg/ml of the extract (0.9) and 10000 µg/ml of Glucantime (0.85).

Considering the inhibition of intracellular and extracellular growth of L. major, the oak gall extract might be used as an efficient and safe agent for treatment of cutaneous leishmaniasis.