جستجوی مقالات مرتبط با کلیدواژه "monosodium glutamate" در نشریات گروه "پزشکی"

Laportea aestuans is a medicinal plant used in ethnomedicine as an abortifacient, anthelminthic, anti-fibroid, antipyretic, and anti-microbial agent. Uterine leiomyoma, a menace of reproductive age in women, is characterized by the proliferation of smooth muscle cells (hyperplasia) in the uterus. This study aims to investigate the preventive and curative anti-leiomyoma activity of Laportea aestuans using monosodium glutamate-induced uterine hyperplasia models in female Sprague-Dawley rats.

The methanol whole plant extract of Laportea aestuans (MELA) was prepared by extracting the pulverized, air-dried whole plant with 2.5 L of methanol in a Soxhlet apparatus, followed by filtration and oven-drying. The acute toxicity of MELA was then assessed using Lorke’s method. Subsequently, three doses of MELA were selected for this study.Uterine hyperplasia was induced with 200 mg/kg p.o. monosodium glutamate (MSG) for 30 days. MELA was either co-administered with the inducing agent (preventive study) or administered post-induction for another 30 days (curative study). The anti-leiomyoma activity of MELA was then assessed through haematological, biochemical, and histopathological findings.

Increased serum oestrogen, progesterone, and total cholesterol levels were observed in the untreated fibroid animal groups, but these were significantly attenuated (p < 0.05) in animals treated with different doses of MELA. This correlated with the histopathological findings, as MELA reversed uterine hyperplasia with its therapeutic potential noted from 500 mg/kg.

These findings suggest that MELA contains bioactive agents that can reverse MSG-induced uterine hyperplasia. It may therefore be useful in reducing the proliferation of fibroblast cells and managing other symptoms associated with uterine leiomyoma upon successful clinical trials.

Monosodium Glutamate (MSG), used widely in the food industry, is a threat to the public health. We investigated whether the MSG administration depletes non-enzymatic antioxidants, i.e., vitamins C and E in the liver of Wistar albino rats. We also examined the restorative effect of the ethanolic extract of Phyllanthus emblica (P. emblica). 

Wistar albino rats (n=42) were adapted and then randomly divided into seven groups of: 1) control, 2, 3, 4) MSG treatment, and 5, 6, 7) combined MSG and P. emblica extract treatment. All rat groups were treated daily for 120 days. They were orally administered either MSG alone or MSG plus the extract combined. The rats were then sacrificed and the liver was harvested from each group, and homogenized to examine the levels of vitamins C and E in the liver, using RP-HPLC method. 

The vitamins C and E levels significantly declined (P<0.05) in the liver of MSG treated groups compared to those of the control rats. The combined treatment (extract + MSG) at low and moderate doses restored the vitamin C levels but it restored vitamin E only at the low dose (P<0.05). 

This study clearly demonstrated the deterioration of non-enzymatic antioxidants, i.e., vitamins C and E in the rats’ liver after chronic exposure to MSG. The findings support the toxic effect and oxidative stress due to MSG exposure to the liver and the beneficial effect of the extract of P. emblica that inhibits the MSG’s harmful effect on the liver.

Monosodium glutamate (MSG) is an additive which is substantially applied in commercially processed foods in order to increase the flavor and sapidity and make a unique flavor which cannot be provided by any other ingredient. Since the discovery of endogenous amino acid glutamate (as a neurotransmitter) in human body, the possible toxicity of exogenous glutamic acid has attracted the attention of numerous scholars. Accordingly, various animal studies have been documented on toxic impacts of MSG on different parts of the body including central nervous system, liver, adipose tissue, reproductive organs, and other systems. Thus, since that time, the safety of MSG has repeatedly been checked and reaffirmed within the scientific communities due to the contradict results. This literature review article specifically aimed to discuss the probable safety of dietary MSG for central nervous system and also provide an integrated information from several studies documented on possible neurotoxic effects of monosodium glutamate on glutamate receptors of Central Nervous System in order to elevate the public awareness about it.

Literature search of this review was done by keywords of “sodium glutamate” “monosodium glutamate”, “MSG”, “central nervous system”, “CNS”, “neurotoxicity”, toxic effects of MSG on “glutamate receptors”, “hypothalamus” and “pituitary” in Google Scholar and PubMed databases and almost all of the 70 relevant articles from 1984-2021 were considered and among those with similar contents, newer ones were included and the others were excluded. Finally, 32 articles were used to write this literature review article.

Collecting the results of all studied articles seems to supports the hypothesis of safety. In fact, it seems that MSG as a food additive within the limited amounts as well as natural levels of glutamic acid which is present in food supplies provides no serious hazard to the human CNS.

The study assessed the hepatoprotective and therapeutic effects of methanol extract of Asystasia gangetica leaves (MEAGL) on rats induced liver injury with monosodium glutamate (MSG).

In this study, fifty-four rats were selected into nine groups, with each of the groups having six rats. Group 1 was the negative control; group 2 was a positive control treated only with MSG, and group 3 was group treated with MSG + 100 mg/kg/day of silymarin. Groups 4 and 5 were extract groups administered with 200 and 500 mg/kg MEAGL/day, whereas groups 6 and 7 were hepatoprotectant groups pre-treated with 200 and 500 mg/kg MEAGL/day before MSG administration. Groups 8 and 9 rats were the therapeutic groups firstly treated with MSG and then orally administered with 200 and 500 mg/kg MEAGL/day, respectively.

The positive group treated with MSG only had significantly (P < 0.05) elevated alanine transaminase (ALT), aspartate transaminase (AST) and alkaline phosphatase (ALP) activities relative to the negative control. MSG induction further caused a significant (P < 0.05) reduction in total protein and albumin concentrations and elevated total and direct bilirubin concentrations of the positive control relative to the negative control. In the groups of MEAGL pre-treated rats as well as the rats treated with MEAGL after being treated with MSG, significantly (P < 0.05) reduced ALT, AST and ALP activities and elevated total protein and albumin concentrations and improved liver architecture compared with the positive group treated only with MSG, were observed.

The findings revealed that the MEAGL possess both hepatoprotective and therapeutic activities that could ameliorate MSG-induced hepatic disorders.

Ketogenic diet (KGD) is a low-carbohydrate, high-fat and average protein dietary formulation, which has been reported with the ability to ameliorate several metabolic diseases, especially those under the direct influence of hormonal disruptions. Monosodium glutamate (MSG) had been found to induce uterine fibroids in laboratory animals through alterations to hormones, lipids and oxidative state. The present study was conducted to evaluate the effect of KGD on MSG-induced uterine fibroid.

In this experimental study twenty-four female Wistar rats were divided into four groups of six. Control group received distilled water while the remaining groups were given 300 mg/kg body weight of MSG once a day for 28 days. Thereafter, the three groups of MSG, MSG + keto group 1 and MSG + keto group 2 received standard rat chow, cabbage-based ketogenic diet and coconut-based ketogenic diet, respectively for 42 days. Estrogen, Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), malondialdehyde (MDA), Superoxide Dismutase (SOD), catalase (CAT), and Total Cholesterol (TC) were determined in the blood of animals using standard methods and induction of fibroids was confirmed in the uterus by histomorphological measurements.

Significant elevations (p<0.05) were observed in the levels of estrogen (1.80±0.09 &1.27±0.12), LH (1.04±0.04 & 0.39±0.01), FSH (1.51±0.04 & 0.65±0.03), TC and MDA in the MSG group compared to control. There were significant decreases (p<0.05) in the activities of CAT and SOD enzymes in the MSG group compared to control. Histological analysis confirmed significant reduction (p<0.05) in leiomyomas of the dietary treatment groups compared to that of MSG.

The study suggests that cabbage- and coconut-based KGD may control the occurrence and progression of fibroids through reduction of oxidative damage and amelioration of hormonal imbalance induced by MSG.

Quinine (QU) as an anti-malarial drug induces alterations in testicular tissue. Toxic effects of monosodium glutamate (MSG) on the male reproductive system have been recognized.

To investigate the impact of MSG administration on the intensity of gonadotoxicity of QU.

Sixty eight-wk old Wistar rats weighing 180-200 gr were divided into six groups (n = 10/each): the first group as a control; the second and third groups received low and high doses of MSG (2 & 4 gr/kg i.p.), respectively, for 28 days; the fourth group received QU for seven days (25 mg/kg); and in the fifth and sixth groups, QU was gavaged following the MSG administration (MSG + QU) from day 22 to day 28. Serum testosterone and malondialdehyde (MDA) levels were measured. Testes samples were prepared for tissue MDA levels, histomorphometry, and immunohistochemistry of p53. Sperm analysis was performed on cauda epididymis.

Serum and tissue MDA levels were increased in treated groups compared to the control group. This increment was higher in the MSG + QU groups. The testosterone levels were reduced significantly (p < 0.0001) in all treated groups. In addition, histomorphometric indices and tubular epithelium population were reduced significantly (p < 0.0001) in QU, MSG + QU, and consequently in high-dose MSG, QU, MSG + QU groups. All spermatogenic indices were reduced in the treated groups, particularly in the MSG + QU groups. Sperm motility and viability indices were reduced significantly (p = 0.003) in the MSG + QU groups. Finally, the overexpression of p53 was observed in the MSG + QU groups.

The administration of MSG before and during QU therapy may intensify testicular tissue alterations.

This brief review provided evidence for the role of green tea extract (GTE)/zinc oxide nanoparticles (ZnO NPs) in a variety of biomedical applications against the toxic effect of monosodium glutamate (MSG). MSG is used to enhance the taste, however it causes oxidative stress in the long-term. Many effects of MSG consumption on the brain, obesity, sex organs, and metabolism have been verified. This review covered the effect of GTE/ZnO NPs on many different organs including the liver, kidney, heart, spleen, testis, brain, and pancreas after being exposed to MSG. The review indicated that the toxicity induced by MSG could be restored by GTE/ZnO NPs in different organs. Accordingly, the green nanoparticles could be attended as a futuristic approach to be used against any toxic substance.

Monosodium glutamate is a sodium salt of a nonessential amino acid, L-glutamic acid, which is widely used in food industry. Glutamate plays an important role in principal brain functions including formation and stabilization of synapses, memory, cognition, learning, as well as cellular metabolism. However, ingestion of foodstuffs rich in monosodium glutamate can result in the outbreak of several health disorders such as neurotoxicity, hepatotoxicity, obesity and diabetes. The usage of medicinal plants and their natural products as a therapy against MSG used in food industry has been suggested to be protective. Calendula officinalis, Curcuma longa, Green Tea, Ginkgo biloba and vitamins are some of the main natural products with protective effect against mentioned monosodium glutamate toxicity through different mechanisms. This review provides a summary on the toxicity of monosodium glutamate and the protective effects of natural products against monosodium glutamate -induced toxicity.

Paclitaxel (PTX), a chemotherapeutic agent, and monosodium glutamate (MSG) have oxidative effects on testicular tissue.

In this study, the effects of MSG administration on the exacerbation of testicular tissue alterations related to PTX treatment were evaluated.

MSG (30 & 60 mg/kg i.p.) was administrated to six groups (n = 8/each) of adult mice before or after PTX treatment: control, PTX-treated, MSG30 + PTX, MSG60 + PTX, PTX + MSG30, and PTX + MSG60. Following the euthanizing, the body weight measurement, pituitary–testicular axis hormonal analysis and serum lipid peroxidation index assessment was prepared, testicular histomorphometry (tubular diameter and germinal epithelium height), immunohistochemistry of p53 was completed. Microscopic indices of spermatogenesis (tubular differentiation, spermiogenesis and repopulation indices) were studied.

Body weight was not changed significantly. The levels of testosterone (p = 0.0001), follicle stimulating hormone (p = 0.019), and luteinizing hormone (p = 0.08) were decreased while the level of lipid peroxidation index was increased (p = 0.208) in the treated groups. The histomorphometry indices (p < 0.0001 and p = 0.001, respectively), germ cells population (p < 0.05) and microscopic indices of spermatogenesis (p = 0.001, p = 0.005, p < 0.0001, respectively) were significantly reduced in all treated groups. The administration of MSG before PTX treatment induces more changes. The most positive reaction to p53 was observed in MSG30 or 60 + PTX groups compared to other groups.

The administration of MSG could intensify testicular tissue alterations related to PTX chemotherapy.