khaled Meghawry El-Zahar

Dr. khaled Meghawry El-Zahar

Qassim University, Buraidah, Saudi Arabia
+1
orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 September 2022 in Molecules
Verified
Journal Article
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KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
MAMubarak Eid Aljamaan
Mubarak Eid Aljamaan
FAFaisal Rasmi Al-Mutairi
Faisal Rasmi Al-Mutairi
AAAbdullah Alhudaib
Abdullah Alhudaib
MAMohamed Saleh Al-Einzi
Mohamed Saleh Al-Einzi
AMAhmed Abdel-Zaher Mohamed
Ahmed Abdel-Zaher Mohamed
This work assessed the phenolic and flavonoid components and their antioxidant, antifungal, and antibacterial effects in the ethanolic extract of barberry leaf and roots. The antibactericidal activity of root and leaf extracts against pathogenic bacteria was tested using agar diffusion and microdilution broth production for the lowest inhibitory concentration (MIC). Berberis vulgaris root and leaf extracts inhibited Staphylococcus aureus ATCC9973, Escherichia coli HB101, Staphylococcus enteritis, and Escherichia coli Cip812. The disc assay technique was used to assess the bactericidal activity of the extracts versus both pathogenic Gram-positive and Gram-negative strains. Hydro alcoholic extract was more effective against bacterial than fungal strains. The results showed that Berberis vulgaris leaf and roots extract had similar antifungal activities. Berberis vulgaris root extract inhibited the mycelial growth of Penicillium verrucosum, Fusarium proliferatum, Aspergillus ochraceous, Aspergillus niger, and Aspergillus flavus. Berberis vulgaris root extract has excellent antioxidant, antibacterial, and antifungal effects. Berberis vulgaris exhibited antimicrobial activity in vitro, and MIC showed that Berberis vulgaris parts efficiently affected pathogens in vitro. In conclusion, both Berberis vulgaris roots and leaves have considerable antibacterial activity and can be used as a source of antibacterial, antioxidant, and bioactive compounds to benefit human health.

20 January 2022 in Fermentation
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Journal Article
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MSMagdy Ramadan Shahein
Magdy Ramadan Shahein
EAEl-Sayed H. Atwaa
El-Sayed H. Atwaa
KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
AEAhdab Abdo Elmaadawy
Ahdab Abdo Elmaadawy
HHHayfa Hussin Ali Hijazy
Hayfa Hussin Ali Hijazy
Ehab Kotb ElmahallawyEhab Kotb Elmahallawy
Ehab Kotb Elmahallawy
The consumption of plant-based dairy alternatives has increased rapidly around the world as a result of numerous positive health effects. Little information is available about the potential use of watermelon seed milk in the manufacture of yoghurt. The present study was undertaken to investigate the remedial action of yoghurt enriched with watermelon seed milk in renal injured hyperuricemic rats. A new yoghurt, substituting cow’s milk with different proportions of watermelon seed milk was prepared, followed by evaluation of its acceptability and functionality. Four different types of yoghurt were prepared from cow’s milk containing 3% fat, with different proportions of blended watermelon seed milk (0.0, 25, 50 and 75%). Sensorial traits, i.e., appearance, flavor, body and texture, and overall acceptability demonstrated that the blended treatment (50% cow’s milk and 50% watermelon seed milk.) was the most acceptable. This blend was then tested as an anti-hyperuricemia agent in rats. In this respect, twenty-four male albino rats were assigned into four groups (n = 6). The first group was solely administered a standard diet, and served as the negative control. The other rats (n = 18) received a basal diet including 20 g/kg dietary potassium oxonate in order to induce hyperuricemia. The hyperuricemic rats were then divided into three groups; the first group did not receive any treatment and served as the positive control, while the second and third groups were administered 10% cow’s milk yoghurt and 10% watermelon seed milk yoghurt, respectively. Interestingly, the results showed that the hyperuricemic group receiving a diet supplemented with 10% watermelon seed milk yoghurt was not significantly different from the negative control in the measured biological parameters, and saw a significant improvement in renal function compared to the positive control. The biologically favorable action of watermelon seed milk yoghurt could be attributed to its potential promotion of antioxidant status via enhancement of the activities of superoxide dismutase, catalase, and glutathione transferase. Collectively, this study concluded that watermelon seed milk can be used in yoghurt manufacturing in proportions of up to 50%, and may improve kidney function as an anti-hyperuricemic agent.

29 October 2021 in Journal of Nutrition and Metabolism
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KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
Mohamed Farghaly yoness HassanMohamed Farghaly yoness Hassan
Mohamed Farghaly yoness Hassan
SASuliman F. Al-Qaba
Suliman F. Al-Qaba
The present study aimed to investigate synergistic health effects of camel milk and Bif. longum BB536 in rats with diet-induced obesity, impaired lipid profile, and hypercholesterolemia. Wistar rats received a high-fat (HF) diet plus 2ml/day of either cows milk fermented with yogurt culture (CT), camel milk fermented with yogurt culture (CAT), camel milk fermented with Bif. longum BB536 (CAP), mixed cows and camel milk fermented with yogurt culture (CCAT), or cows milk and camel milk fermented with Bif. longum (CCAP). All fermented milk products significantly reduced HDL, albumin, and total protein. The percentage change in body weight gain was between 40 (CAP) and 24 (CT) and in serum triglycerides between 54 (CCAP) and 37 (CT); for the other parameters, changes caused by CCAP/CT were 40/22 (total cholesterol), +29/+8 (HDL), 73/54 (LDL), 54/37 (VLDL), 52/14 (AST), 53/31 (ALT), +43/+25 (albumin), +37/+25 (total protein), 48/27 (urea), and 34/16 (creatinine). Camel or cows milk fermented with yogurt culture or Bif. longum significantly improved negative effects of the HF diet on body weight, blood lipid profile, serum proteins, liver and kidney markers, and severity of the metabolic syndrome. Milk and fermentation culture acted synergistically with camel milk and Bif. longum generally showed stronger positive effects./

9 November 2022 in Molecules
Verified
Journal Article
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MAMohamed Saleh Al-Anazi
Mohamed Saleh Al-Anazi
KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
NRNourhan Abdel-Hamid Rabie
Nourhan Abdel-Hamid Rabie
Quinoa is a nutrient-dense food that lowers chronic disease risk. This study evaluated the physicochemical and sensory qualities of fermented camel milk with 1, 2, 3, and 4% quinoa. The results showed that improvement in camel’s milk increased the total solids, protein, ash, fiber, phenolic content, and antioxidant activity more effectively. Fermented camel milk with 3% of quinoa flour exhibited the highest sensory characteristics compared to other treatments. Fermented camel milk enriched with 3% red quinoa flour was studied in obese rats. Forty male Wistar rats were separated into five groups: the first group served as a normal control, while groups 2–4 were fed a high-fat, high-cholesterol (HF)-diet and given 2 mL/day of fermented milk and quinoa aqueous extract. Blood glucose, malondialdehyde (MDA), low-density lipoprotein (LDL), cholesterol, triglyceride, aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase (ALP), creatinine, and urea levels decreased dramatically in comparison to the positive control group, while high-density lipoprotein (HDL), albumin, and total protein concentrations increased significantly. Fortified fermented camel milk decreased the number of giant adipocytes while increasing the number of tiny adipocytes in the body. The results showed that the liver and renal functions of hypercholesterolemic rats were enhanced by consuming fermented milk and quinoa. These results demonstrated the ability of quinoa and camel milk to protect rats from oxidative stress and hyperlipidemia. Further studies are needed to clarify the mechanisms behind the metabolic effects of fermented camel milk and quinoa.

8 April 2022 in Fermentation
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Journal Article
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YAYousef Mesfer Alharbi
Yousef Mesfer Alharbi
KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
HMHassan Mirghani Mousa
Hassan Mirghani Mousa
As hyperlipidemia has been associated with cardiovascular diseases, this study investigated the influence of probiotic-fermented camel and cow’s milk on blood lipid profiles in hypercholesterolemic rats. When tested, probiotic-fermented camel and cow’s milk exhibited the highest overall acceptance score in flavor and texture. Forty-eight male Wistar rats were divided into eight groups (n = 6). The first group served as normal control, while groups 2–8 were fed on a high-fat (HFD), high-cholesterol diet throughout the experimental period and treated with different types of fermented milks. Feeding rats on probiotic-fermented milk resulted in a significant decrease in the level of triglycerides (TG), cholesterol, and LDL compared with the positive control group. Albumin and total protein concentrations increased significantly, while ALT, AST, and creatinine were significantly reduced in rats fed on probiotic-fermented milk. The results indicated that probiotic-fermented milk might improve liver and kidney functions in hypercholesterolemic rats. These findings highlighted the ameliorative potentials of camel milk against hyperlipidemia and oxidative stress in rats.

1 January 2024 in Anais da Academia Brasileira de Ciências
Verified
Journal Article
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YAYousef Mesfer Alharbi
Yousef Mesfer Alharbi
KEkhaled Meghawry El-Zahar
khaled Meghawry El-Zahar
SQSAFA H QAHL
SAFA H QAHL
AAAmira Alghamdi
Amira Alghamdi
AAAsmaa Ali Alharbi
Asmaa Ali Alharbi
Mohamed T. El-SaadonyMohamed T. El-Saadony
Mohamed T. El-Saadony
This work investigated the antioxidant and hepatoprotective activities of lemongrass extract and its effects on rat hepatotoxicity. The lemongrass extract (LGE) contains bioactive components such as phenolic acids, flavonoid components, vitamin C, fibers, and tannins. The LGE had high phenolic content (397 mg/100g) and flavonoids (164 mg/100g), influencing its antioxidant activity of 91.25%. Additionally, it inhibited 81% of breast cancer, also, inhibited the growth of pathogenic bacteria and Candida at a concentration of 20-40 µg/mL. Additionally, it inhibited SARS-Cov-2 by 75%; however, increasing the activity of Cas-3. Quercetin-3-rhamnoside was the main phenolic compound in the HPLC profile; the phenolic compounds may be attributable to the beneficial effects of LGE. In this study, the CCl4-challenged rats delivered two levels of LGE (100 and 300 mg/kg BW). LGE reduced ALT, AST, creatinine and urea by 50 and 37%, respectively. Generally, LGE mitigated the oxidative stress induced by CCl4, which is evident in the histology of liver and kidney tissues, where significant improvement, with no cytoplasmic degradation in undamaged liver hepatocytes, improved kidney performance and shape. It can be concluded that polyphenolic-rich LGE can mitigate the oxidative stress induced by CCl4 and other parameters while enhancing kidney and liver performance.