Mamdouh Alshammari

Dr. Mamdouh Alshammari

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

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

Representative Publications

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19 November 2024 in Pharmaceuticals
Verified
Journal Article
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ASAbdel Moneim Elhadi Sulieman
Abdel Moneim Elhadi Sulieman
SISafa Mustafa Ibrahim
Safa Mustafa Ibrahim
MAMamdouh Alshammari
Mamdouh Alshammari
FAFahad Abdulaziz
Fahad Abdulaziz
HIHajo Idriss
Hajo Idriss
Riadh BadraouiRiadh Badraoui
Riadh Badraoui
Background: Zingiber officinale rhizome is widely cultivated in the central region of Sudan (Gezira) and data on the biological properties of this variety grown in Sudan’s climate are scarce. This study aims to comprehensively analyze the antibacterial, antioxidant, phytochemical, and GC-MS properties of Zingiber officinale (ginger rhizome) to explore its potential applications. Methods and Results: The in vitro antibacterial assessment of the aqueous extract of Sudanese ginger revealed moderate activity against Staphylococcus aureus, Salmonella typhi, Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumonia, as determined by the disc diffusion method. The inhibition zones ranged from 12.87 ± 0.11 mm to 14.5 ± 0.12 mm at 30 µg/disc. The minimum inhibitory concentration ranged from 6.25 to 25 µg/mL, while the MBC ranged from 25 to 50 µg/mL. The MBC/MIC exhibited a bactericidal effect against all tested bacteria. Phytochemical screening revealed the presence of various chemical constituents, such as saponins, flavonoids, glycosides, alkaloids, steroids, terpenoids, and the absence of tannins in Sudanese ginger rhizome. Furthermore, GC-MS analysis of ginger rhizome identified 22 chemical compounds with retention times ranging from 7.564 to 17.023 min. The identification of 22 chemical compounds through GC-MS analysis further underscores the prospect of harnessing ginger rhizome for the development of novel medications. Computational analyses showed that ginger compounds bind the Protein Data Bank (PDB) codes 1JIJ and 2QZW with high binding affinities, reaching −9.5 kcal/mol. Ginger compounds also established promising molecular interactions with some key residues, satisfactorily explaining the in vitro results and supporting the pharmacokinetic and experimental findings. Conclusions: This study lays the groundwork for future research and pharmaceutical exploration aimed at harnessing the beneficial properties of ginger rhizome for medicinal and therapeutic purposes, particularly its antimicrobial potential.

13 December 2024 in Plants
Verified
Journal Article
Open access
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ASAbdel Moneim Elhadi Sulieman
Abdel Moneim Elhadi Sulieman
HIHajo Idriss
Hajo Idriss
MAMamdouh Alshammari
Mamdouh Alshammari
NANujud Almuzaini
Nujud Almuzaini
NINosyba Ahmed Ibrahim
Nosyba Ahmed Ibrahim
Emad M. AbdallahEmad M. Abdallah
Emad M. Abdallah
The arid mountainous region of Hail in Saudi Arabia has a variety of desert vegetation, some of which are conventionally used in Bedouin traditional medicine. These plants need scientific examination. This research seeks to examine Blepharis ciliaris using a thorough multi-analytical methodology that includes antibacterial and antioxidant assessments as well as computational modeling. GC–MS analysis of the methanolic extract revealed 17 organic compounds, including pentadecanoic acid, ethyl methyl ester (2.63%); hexadecanoic acid, methyl ester (1.00%); 9,12-octadecadienoic acid (Z,Z)-, methyl ester (2.74%); 9-octadecenoic acid, methyl ester (E) (2.78%); octadecanoic acid (5.88%); 9-tetradecenoic acid (Z) (3.22%); and undec-10-enoic acid, undec-2-n-1-yl ester (5.67%). The DPPH test evaluated antioxidant activity, revealing a notable increase with higher concentrations of the methanolic extract, achieving maximum inhibition of 81.54% at 1000 µg/mL. The methanolic extract exhibited moderate antibacterial activity, with average inhibition zones of 10.33 ± 1.53 mm, 13.33 ± 1.53 mm, 10.67 ± 1.53 mm, and 10.00 ± 2.00 mm against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Serratia marcescens, respectively, as determined by the disk diffusion method. The minimum inhibitory concentration (MIC) values were 500 µg/mL for S. aureus and B. subtilis, whereas E. coli and S. marcescens showed susceptibility at 1000 µg/mL. Computational simulations were employed to assess the toxicity, drug-likeness, and ADMET profiles of compounds derived from Blepharis ciliaris. Thirteen bioactive compounds were assessed in silico against Staphylococcus aureus sortase A (PDB: 1T2O), Bacillus subtilis BsFabHb (PDB: 8VDB), Escherichia coli LPS assembly protein (LptD) (PDB: 4RHB), and a modeled Serratia marcescens outer-membrane protein TolC, focusing on cell wall and membrane structures. Compound 3, (+)-Ascorbic acid 2,6-dihexadecanoate, shown significant binding affinities to B. subtilis BsFabHb, E. coli LPS assembly protein, and S. marcescens TolC.

23 September 2024 in Preprints.org
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Preprint
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ASAbdel Moneim Elhadi Sulieman
Abdel Moneim Elhadi Sulieman
SISafa Mustafa Ibrahim
Safa Mustafa Ibrahim
MAMamdouh Alshammari
Mamdouh Alshammari
FAFahad Abdulaziz
Fahad Abdulaziz
HIHajo Idriss
Hajo Idriss
Riadh BadraouiRiadh Badraoui
Riadh Badraoui
Zingiber officinale rhizome is widely cultivated in the central region of Sudan (Gezira) and data on the biological properties of this variety grown in the Sudan climate is scarce. The study aims to comprehensively analyze the antibacterial, antioxidant, phytochemical, and GC-MS properties of Zingiber officinale (Ginger rhizome) to explore its potential applications. The in vitro antibacterial assessment of the aqueous extract of the Sudanese ginger revealed moderate activity against Staphylococcus aureus, Salmonella typhi, Pseudomonas aeruginosa, Escherichia coli , and Klebsiella pneumonia, as resulted from the disc-diffusion which ranged between 12.87±0.11 mm to 14.5±0.12 mm at 30 µg/disc. The minimum inhibition concentration ranged between 6.25 to 25 µg/ml, the MBC were between 25 and 50 µg/ml, and the MBC/MIC exhibited its bactericidal effect against all tested bacteria. The phytochemical screening revealed the presence of various chemical constituents such as saponins, flavonoids, glycosides, alkaloids, steroids, terpenoids, and absence of tannins in the Sudanese ginger rhizome. Furthermore, the GC-MS study of ginger rhizome identified 22 chemical compounds with retention times ranging from 7.564 to 17.023 minutes. The identification of 22 chemical compounds through GC-MS analysis further underscores the prospect of harnessing ginger rhizome for the development of novel medications. The computational analyses showed that ginger compounds bind the 1JIJ and 2QZW with high binding affinities, which reach –9.5 kcal/mol. Ginger compounds also established promising molecular interactions with some key residues, that satisfactorily explain the in vitro results and support the pharmacokinetic and experimental findings. This study lays the groundwork for future research and pharmaceutical exploration aimed at harnessing the beneficial properties of ginger rhizome for medicinal and therapeutic purposes, particularly its antimicrobial potential.

6 June 2026 in Scientific Reports
Verified
Journal Article
Open access
MAMamdouh Alshammari
Mamdouh Alshammari
CSCengiz Sarikurkcu
Cengiz Sarikurkcu
Fevzi BardakciFevzi Bardakci
Fevzi Bardakci
MAMousa Alreshidi
Mousa Alreshidi
Mohd AdnanMohd Adnan
Mohd Adnan
BTBektas Tepe
Bektas Tepe
The bioprospecting of Onosma species for multifunctional phenolics is gaining momentum, yet the impact of extraction methods on bioactivity is underexplored. This study compared methanolic extracts of O. rechingeri obtained via ultrasound-assisted extraction (UAE-ME), maceration (MAC-ME), and Soxhlet (SOE-ME). Total phenolic and flavonoid content was highest in SOE-ME. Luteolin-7-glucoside and hesperidin were abundant in MAC-ME, while SOE-ME was richest in rosmarinic acid. SOE-ME showed superior electron-transfer antioxidant activity, while metal chelation favored UAE-ME and MAC-ME. Enzyme inhibition varied by extraction: MAC-ME was most effective against AChE and α-amylase, SOE-ME against tyrosinase. Correlation analysis revealed distinct compound-activity associations: tyrosinase aligned with electron transfer, AChE and α-amylase with chelation. Docking suggested luteolin-7-glucoside as a strong α-amylase binder (-9.09 kcal/mol) and rosmarinic acid as a promising in silico binder of AChE and TYRP1. Overall, extraction strategy significantly alters chemical profiles and bioactivity, but these findings should be interpreted as preliminary because they are based on crude extracts, in vitro assays, correlation analysis with a limited sample set, and docking predictions; therefore, they highlight the need for targeted fractionation and further biological validation.

29 July 2026 in Life
Verified
Journal Article
Open access
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Mejdi SnoussiMejdi Snoussi
Mejdi Snoussi
Emira NoumiEmira Noumi
Emira Noumi
MAManal Mohammed Alzahrani
Manal Mohammed Alzahrani
KAKhulood Fahad Alabbosh
Khulood Fahad Alabbosh
QAQusai Alsenani
Qusai Alsenani
AKAdel Kadri
Adel Kadri
Background/Objectives: Allium atroviolaceum Boiss. is a functional food rich in phenolic compounds; however, the contribution of different plant organs to its bioactivity remains insufficiently understood. Methods: An integrated approach combining UHPLC-QTOF-IMS based metabolite profiling, network pharmacology, molecular docking, and experimental antioxidant assays was employed. Results: Metabolite profiling revealed that the flowers were rich in anthocyanins and flavonoids; leaves in flavonol glycosides; bulbs in flavonoids, phenolics, and lipids; and flower stalks in flavonoid glycosides and sterols. Interestingly, flowers exhibited the strongest antioxidant scavenging activity, with the lowest IC50 values of 3.08 ± 0.21 µg/mL and 89 ± 2.8 µg/mL in the DPPH and ABTS assays, respectively. They also showed the highest FRAP response at 2 mg/mL (1.367 ± 0.010 at 2 mg/mL). Moreover, flower stalks were particularly effective in limiting lipid oxidation, displaying the greatest activity in the β-carotene bleaching assay, with an IC50 value of 14.75 ± 0.29 µg/mL. Network-based target prioritization highlighted several oxidative stress/inflammation-associated proteins, including EGFR, HRAS, TGFB1, BCL2, JUN, TNF, TP53, MAPK1, and PTGS2. Additionally, Caffeoyl pinoresinol showed the strongest predicted interaction with PTGS2 and was therefore selected as a candidate ligand for further computational evaluation. Conclusions: A. atroviolaceum exhibits organ-specific phytochemical diversity and potent antioxidant activity mediated through multiple molecular targets. The in silico analyses identified candidate compound–target associations related to oxidative stress and inflammatory pathways, but these findings remain predictive and require biochemical and cell-based validation.

16 September 2026 in RSC Advances
Verified
Journal Article
Open access
PPPankaj Patil
Pankaj Patil
ABAbhay Bagul
Abhay Bagul
MKManish Kumar
Manish Kumar
ATAisha Tufail
Aisha Tufail
YAYasser Alraey
Yasser Alraey
ADAmit Dubey
Amit Dubey
Vitamin B 1 -catalyzed green synthesis of previously unreported 2-amino-7-hydroxy-4-aryl-4 H -chromene-3-carbonitriles (PPA1–PPA5) was achieved under mild aqueous ethanol conditions.