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Alkahtani SA, Mahmoud AM, Alqahtani YS, Ali AMBH, El-Wekil MM. Selective detection of rutin at novel pyridinic-nitrogen-rich carbon dots derived from chicken feet biowaste: The role of bovine serum albumin during the assay. Spectrochim Acta A Mol Biomol Spectrosc 2023; 303:123252. [PMID: 37579662 DOI: 10.1016/j.saa.2023.123252] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/01/2023] [Accepted: 08/08/2023] [Indexed: 08/16/2023]
Abstract
A simple fluorescence method is described for measuring rutin dependent on the nitogen-doped carbon dots (NCDs) prepared via simple pyrolysis method from chicken feet biowaste. The as-fabricated NCDs have unique advantages including cost-effectiveness and high quantum yield (42.9 %). The as-prepared NCDs explore an optimal emission band at 430 nm following exciting NCDs at 330 nm. Addition of rutin to blue-emissive NCDs quenched their fluorescence emission by inner-filtration effect (IFE) and static quenching. Under optimized conditions, the fluorescence responses increased as the rutin amount was raised from 100 to 1000 nmol/L with 5.3 nmol/L as a detection limit (S/N = 3). The probe selectivity was improved by adding bovine serum albumin (BSA), which binds other structurally-related compounds (other flavonoids). The as-synthesized NCDs exhibited some advantages towards rutin detection such as: lower LOD value, satisfactorily reproducibility, simplicity, rapidity, selectivity, and stability. The sensing probe was efficiently utilized for determining rutin in different real samples with acceptable results. The sensor offers an efficient biowaste-based approach for the determination of (bio) molecules.
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Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Yahya S Alqahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Al-Montaser Bellah H Ali
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Alkahtani SA, Mahmoud AM, Ali R, El-Wekil MM. Sonochemical synthesis of lanthanum ferrite nanoparticle-decorated carbon nanotubes for simultaneous electrochemical determination of acetaminophen and dopamine. Mikrochim Acta 2023; 191:25. [PMID: 38091119 DOI: 10.1007/s00604-023-06110-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023]
Abstract
A new nanocomposite consisting of lanthanum ferrite nanoparticles (LaFeO3 NPs) integrated with carbon nanotubes (CNTs) was fabricated via facile sonochemical approach. The engineered nanocomposite was applied to simultaneously determine acetaminophen (ACP) and dopamine (DA) in a binary mixture. The LaFeO3 NPs@CNT probe possesses several advantages such as superior conductivity, large surface area, and more active sites, improving its electrocatalytic activity towards ACP and DA. Under optimized conditions, the anodic peak currents (Ipa) linearly increased with increasing concentration of ACP and DA in the range 0.069-210 µM and 0.15-210 µM, respectively. The sensitivity of LaFeO3 NPs@CNTs/glassy carbon electrode (GCE) for detecting ACP and DA is 7.456 and 5.980 μA·μM-1·cm-2, respectively. The detection limits (S/N = 3) for ACP and DA are 0.02 μM and 0.05 μM, respectively. Advantages of LaFeO3 NPs@CNTs/GCE for the detection of ACP and DA include wide linear ranges, low-detection limits, good selectivity, and long-term stability. The as-fabricated electrode was applied to determine ACP and DA in pharmaceutical formulations and human serum samples with recoveries ranging from 97.7 to 103.3% and an RSD that did not exceed 3.7%, confirming the suitability of the proposed sensor for the determination of ACP and DA in real samples. This study not only presents promising opportunities for enhancing the sensitivity and stability of electrochemical sensors used in the detection of bioanalytes but also significantly contributes to the progress of unique and comprehensive biochemical detection methodologies.
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Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ramadan Ali
- Department of Pharmaceutical Chemistry, FacultyofPharmacy, University of Tabuk, 71491, Tabuk, Saudi Arabia.
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al Azhar University, Assiut Branch, Asyut, 71526, Egypt.
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Abdel-Wahab BA, Alkahtani SA, Alqahtani AA, Hassanein EHM. Correction to: Umbelliferone ameliorates ulcerative colitis induced by acetic acid via modulation of TLR4/NF‑κB‑p65/iNOS and SIRT1/PPARγ signaling pathways in rats. Environ Sci Pollut Res Int 2023; 30:32117-32118. [PMID: 36746866 DOI: 10.1007/s11356-023-25751-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Affiliation(s)
- Basel A Abdel-Wahab
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
- Department of Medical Pharmacology, College of Medicine, Assiut University, Assiut, Egypt.
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Abdulsalam A Alqahtani
- Department of Pharmaceutics, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Emad H M Hassanein
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
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Abdel-Wahab BA, Alkahtani SA, Alqahtani AA, Hassanein EHM. Umbelliferone ameliorates ulcerative colitis induced by acetic acid via modulation of TLR4/NF-κB-p65/iNOS and SIRT1/PPARγ signaling pathways in rats. Environ Sci Pollut Res Int 2022; 29:37644-37659. [PMID: 35066822 DOI: 10.1007/s11356-021-18252-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Ulcerative colitis (UC) is a common chronic, idiopathic inflammatory bowel disease associated with inflammatory perturbation and oxidative stress. Umbelliferone (UMB) is a potent anti-inflammatory and antioxidant coumarin derivative. Depending on the possible mechanisms, we aimed to explore and elucidate the therapeutic potential of UMB on UC-inflammatory response and oxidative injury-induced via intrarectal administration of acetic acid (AA) in rats. Animals were assigned into four groups: control group, UMB (30 mg/kg, oral)-treated group, AA-induced colitis model group (2 ml of AA; 3% v/v), and colitis treated with UMB group. The results showed that UMB improved macroscopic and histological tissue injury caused by the AA. Mechanistically, UMB reduced the elevated colonic TNF-α, IL-6, MPO, and VCAM-1 and downregulated the gene and protein expression of TLR4, NF-κB, and iNOS signaling factors, exhibiting potent anti-inflammatory effects. Moreover, UMB upregulated the gene and protein expression of both SIRT1 and PPARγ signaling pathways, thereby inhibiting both oxidative injury and inflammatory response. Conclusively, UMB protected rats against AA-induced UC by suppressing the TLR4/NF-κB-p65/iNOS signaling pathway and promoting the SIRT1/PPARγ signaling. Our results showed the effectiveness of UMB in alleviating the pathogenesis of UC and introduced it as a possible therapeutic applicant for clinical application.
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Affiliation(s)
- Basel A Abdel-Wahab
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
- Department of Medical Pharmacology, College of Medicine, Assiut University, Assiut, Egypt.
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Abdulsalam A Alqahtani
- Department of Pharmaceutics, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Emad H M Hassanein
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
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Mahmoud AM, Alkahtani SA, El-Wekil MM. Correction to: Highly selective and sensitive electrochemical determination of cysteine based on complexation with gold nanoparticle-modified copper‑based metal organic frameworks. Anal Bioanal Chem 2022; 414:2535. [PMID: 35122143 DOI: 10.1007/s00216-022-03952-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 02/01/2022] [Indexed: 11/25/2022]
Affiliation(s)
- Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Asyut, Egypt.
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Alkahtani SA, Alshabi AM, Abdel-Wahab BA, Aljadaan A, Shaikh IA, Khateeb MM, Habeeb MS. Enhanced antinociceptive activity of Nigella sativa oil after its combined treatment with honey in rats. Pak J Pharm Sci 2022; 35:1-8. [PMID: 35221265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Antinociceptive activity of honey and Nigella sativa (N. sativa) oil are well known. Therefore, aim of this study was to investigate the antinociceptive effect of N. sativa oil and its concurrent administration with honey in rats. The tested animals were randomized into 5 groups: Group (1) Normal saline (0.2ml, p.o.); Group (2) N. sativa oil (1gm/kg, p.o.); Group (3) honey (1gm/kg, p.o.); Group (4) N. sativa oil (1gm/kg, p.o.) + honey (1gm/kg, p.o.): Group (5) pethidine (20mg/kg, S.C.) as positive standard. The antinociceptive activity was tested using radiant heat and tail immersion tests. Antioxidant potential was determined by using in-vitro antioxidant assays. Our findings showed that N. sativa oil and honey have antinociceptive effect, the antinociceptive effect appeared after 30 and 60min of administration and declined after 120 and 180 min. Combined administration of N. sativa oil with Honey increased the antinociceptive effect by 20 to 30% in all models. In addition, the antinociceptive effect of the combination reduced the time for onset of action as well as prolonged its duration of action. In conclusion, combined treatment of N. sativa oil with honey increased its antinociceptive activity, showed faster onset of action and prolonged its duration, the fact that can be utilized in the management of painful conditions in humans.
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Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ali Mohamed Alshabi
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Basel A Abdel-Wahab
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Saudi Arabia/Department of Pharmacology, College of Medicine, Assiut University, Assiut, Egypt
| | - Adel Aljadaan
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ibrahim Ahmed Shaikh
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Masood Medleri Khateeb
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Saudi Arabia
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Albekairy AM, Obaidat AA, Alsharidah MS, Alqasomi AA, Alsayari AS, Albarraq AA, Aljabri AM, Alrasheedy AA, Alsuwayt BH, Aldhubiab BE, Almaliki FA, Alrobaian MM, Aref MA, Altwaijry NA, Alotaibi NH, Alkahtani SA, Bahashwan SA, Alahmadi YA. Evaluation of the Potential of National Sharing of a Unified Progress Test Among Colleges of Pharmacy in the Kingdom of Saudi Arabia. Adv Med Educ Pract 2021; 12:1465-1475. [PMID: 34938140 PMCID: PMC8687445 DOI: 10.2147/amep.s337266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND With the expansion in pharmacy education in Saudi Arabia, there is a pressing need to maintain quality assurance in pharmacy programs using several tools. The progress test is a formative assessment tool that can serve to provide information to all stakeholders. This study evaluated the results of a unified progress test that was shared among 15 colleges of pharmacy. METHODS The progress test was composed of 100 MCQs where 30% of which cover basic pharmaceutical sciences and 70% cover pharmacy practice. The questions were collected from all the 15 colleges of pharmacy participated in the test. The test was administered online to all undergraduate students in the professional programs of these colleges. RESULTS The overall attendance rate was 80% from the total number of students enrolled in the participating colleges. Mean scores of students in basic pharmaceutical sciences were relatively higher than in pharmacy practice. The assessment results of the students in the unified program learning outcomes among colleges were higher in the domains of knowledge and skills compared to competence domain. There was a significant increment in the mean scores of the students as they progress through the years of the professional program. No correlation was found between the mean scores in the test and the cumulative grade point average (cGPA) of all students regardless of their level. CONCLUSION The results indicated growth and maintenance of the gained knowledge and skills by the students as they progress through the years of the professional program with consistency in the results among the participating colleges. Sharing a unified test was effective as a valuable tool for the colleges of pharmacy for the purposes of benchmarking and improving the curricula. In addition, it could serve to evaluate learning of students and harmonize knowledge and skills gained by students at different institutions.
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Affiliation(s)
- Abdulkareem M Albekairy
- College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Aiman A Obaidat
- College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | | | | | | | | | - Ahmad M Aljabri
- College of Pharmacy, University of Tabuk, Tabuk, Saudi Arabia
| | | | - Bader H Alsuwayt
- College of Pharmacy, Northern Border University, Rafha, Saudi Arabia
| | - Bandar E Aldhubiab
- College of Clinical Pharmacy, King Faisal University, Al Hofuf, Saudi Arabia
| | | | | | - Mohammad A Aref
- College of Pharmacy, Albaha University, Albaha, Saudi Arabia
| | - Najla A Altwaijry
- College of Pharmacy, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
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Elrggal ME, Alamer SI, Alkahtani SA, Alshrahili MA, Alharbi A, Alghamdi BA, Zaitoun MF. Dispensing Practices for Weight Management Products in Eastern Saudi Arabia: A Survey of Community Pharmacists. Int J Environ Res Public Health 2021; 18:ijerph182413146. [PMID: 34948755 PMCID: PMC8700952 DOI: 10.3390/ijerph182413146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 12/03/2021] [Accepted: 12/10/2021] [Indexed: 12/03/2022]
Abstract
Due to changing lifestyles and socioeconomic status, obesity prevalence has been rising in Saudi Arabia, and community pharmacists often counsel patients about its management. The study aimed to evaluate practices of community pharmacists involved in dispensing products for weight control in four cities located in the eastern province of Saudi Arabia. A cross-sectional study was conducted involving community pharmacists in Dammam, Dhahran, Khobar, and Al-Ahsa, using a Likert format questionnaire. Only those who consented to participate were handed the questionnaire. A total of 100 complete responses were analyzed. The median value for packs sold per month for tea containing products Al-Diafa Slimming Tea, Jamue Tea, and Green Tea was ≥6 while the same for orlistat and apple cider vinegar were ≤4. Moreover, >50% of pharmacists mentioned that orlistat and apple cider vinegar were effective while ≥35% mentioned that metformin and Jamue tea were effective. Furthermore, ≥25% mentioned that green tea and Al-Diafa slimming tea were effective. Excluding orlistat, >50% of pharmacists did not know about adverse effects for other products. The rate of dispensing of several weight loss products was significant for participants’ background characteristics, such as time duration of consultation, gender, and age of patients, and pharmacist work experience (p < 0.05). The tea products and orlistat were the most frequently sold products, and community pharmacists appeared most knowledgeable about the effectiveness and adverse effect of orlistat. The pharmacists seemed to be aware about the effectiveness of other weight loss products; however, their knowledge about their potential adverse effects was unsatisfactory.
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Affiliation(s)
- Mahmoud E. Elrggal
- Clinical Pharmacy Department, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (M.E.E.); (A.A.)
| | - Sarah Ibrahim Alamer
- Pharmacy Practice Department, College of Clinical Pharmacy, King Faisal University, Al Hofuf 31982, Saudi Arabia;
| | - Saad A. Alkahtani
- Clinical Pharmacy Department, College of Pharmacy, Najran University, Najran 55461, Saudi Arabia;
| | | | - Adnan Alharbi
- Clinical Pharmacy Department, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (M.E.E.); (A.A.)
| | - Bayan Ali Alghamdi
- Pharmaceutical Care Administration, Armed Forces Hospitals Southern Region, Khamis Mushait 61961, Saudi Arabia;
| | - Mohammad Fathullah Zaitoun
- Pharmaceutical Care Administration, Armed Forces Hospitals Southern Region, Khamis Mushait 61961, Saudi Arabia;
- Correspondence:
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Alkahtani SA, Mahmoud AM, Mahnashi MH, Ali R, El-Wekil MM. Facile fabrication of a novel 3D rose like lanthanum doped zirconia decorated reduced graphene oxide nanosheets: An efficient electro-catalyst for electrochemical reduction of futuristic anti-cancer drug salinomycin during pharmacokinetic study [Biosens Bioelectron 150 (2020) 111849]. Biosens Bioelectron 2021; 183:113202. [PMID: 33812292 DOI: 10.1016/j.bios.2021.113202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt; Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ramadan Ali
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al-Azhar University, Assuit, Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Alqahtani M, Tickler IA, Al Deesi Z, AlFouzan W, Al Jabri A, Al Jindan R, Al Johani S, Alkahtani SA, Al Kharusi A, Mokaddas E, Nabi A, Saeed N, Madian A, Whitmore J, Tenover FC. Molecular detection of carbapenem resistance genes in rectal swabs from patients in Gulf Cooperation Council hospitals. J Hosp Infect 2021; 112:96-103. [PMID: 33839212 DOI: 10.1016/j.jhin.2021.03.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Gram-negative organisms harbouring carbapenem resistance genes (CRGs) are spreading globally, including in Gulf Cooperation Council (GCC) countries. However, relatively few data are available about carriage of CRGs in hospitalized patients in this region. AIM To determine prevalence of CRG carriage and risk factors for colonization among patients in GCC hospitals. METHODS Rectal swabs were obtained from ∼50 intensive care unit (ICU) patients from each of 11 hospitals in five GCC countries between March and November 2019. The swabs were tested for the presence of blaKPC, blaNDM, blaVIM, blaIMP, and blaOXA-48 CRG using a commercial polymerase chain reaction test. Data on risk factors for colonization were collected and analysed. FINDINGS Of 529 specimens screened, 138 (26.1%) were positive for one or more CRGs. The positivity rates among the hospitals ranged from 8.0% to 67.3%; ∼20% of the positive specimens harboured ≥2 CRGs. The most common CRG detected was blaOXA-48, which was present in 82 specimens (15.5%). Additional CRGs included blaNDM, blaVIM, blaKPC, and blaIMP either alone or in combination. Overall, 31.1% of patients on antibiotics on admission to the ICU were positive for CRGs compared to 16.5% not on antibiotic therapy (P < 0.001). CRG detection was also more common among patients aged >65 years (P = 0.027) and increased with hospital length of stay (P = 0.025). CONCLUSION The rate of CRGs detected in hospitalized patients in GCC countries varied considerably. Prior antibiotic exposure, increasing age, and prolonged length of stay were associated with CRG detection.
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Affiliation(s)
- M Alqahtani
- Bahrain Defence Forces Hospital, West Riffa, Bahrain
| | | | - Z Al Deesi
- Latifa Hospital for Women and Children, Dubai, United Arab Emirates
| | | | | | - R Al Jindan
- King Fahad Hospital of the University, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - S Al Johani
- King Abdulaziz Medical City, Riyadh, Saudi Arabia
| | - S A Alkahtani
- Armed Forces Hospital Southern Region, Khamis Mushait, Saudi Arabia
| | | | | | - A Nabi
- Rashid Hospital, Dubai, United Arab Emirates
| | - N Saeed
- Salmaniya Medical Centre, Manama, Bahrain
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Alqarni AO, Alkahtani SA, Mahmoud AM, El-Wekil MM. Design of "Turn On" fluorometric nanoprobe based on nitrogen doped graphene quantum dots modified with β-cyclodextrin and vitamin B 6 cofactor for selective sensing of dopamine in human serum. Spectrochim Acta A Mol Biomol Spectrosc 2021; 248:119180. [PMID: 33234475 DOI: 10.1016/j.saa.2020.119180] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/01/2020] [Accepted: 11/01/2020] [Indexed: 06/11/2023]
Abstract
Herein, a novel and rapid fluorometric nanoprobe was constructed for quantitation of dopamine (DA) in presence of biologically interfering compounds. The nanoprobe based on synthesis of yellow emissive nitrogen doped graphene quantum dots (N@GQDs) by advanced thermal driven oxidation. After that, the synthesized N@GQDs was capped with β-cyclodextrin (β-CD), followed by interaction with pyridoxal (PYL) vitamin B6 cofactor. This interaction resulted in diminishing the yellow fluorescence of β-CD/N@GQDs, and appearance of blue emission peak at 420 nm. Upon addition of DA, the blue emission of β-CD/N@GQDs was increased after excitation at λ = 330 nm. Under optimum conditions, the nanoprobe exhibited a linear range of 0.36-400 nM with limit of detection (LOD) of 0.117 nM. In addition, the fluorescent nanoprobe shows high selectivity and can be used for detection of DA in complicated biological matrices and human serum. This strategy might provide a potential tool for clinical diagnosis and biomedical research for DA related diseases.
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Affiliation(s)
- Ali O Alqarni
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudia Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Alkahtani SA, Mahmoud AM, Mahnashi MH, AlQarni AO, Alqahtani YSA, El-Wekil MM. Facile one pot sonochemical synthesis of layered nanostructure of ZnS NPs/rGO nanosheets for simultaneous analysis of daclatasvir and hydroxychloroquine. Microchem J 2021; 164:105972. [PMID: 33518809 PMCID: PMC7826116 DOI: 10.1016/j.microc.2021.105972] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 01/13/2021] [Accepted: 01/16/2021] [Indexed: 11/30/2022]
Abstract
In this study, zinc sulfide nanoparticles were loaded on reduced graphene oxide (ZnS NPs/rGO) using simple sonochemical method. The nanocomposite was characterized using different morphological and electrochemical techniques such as TEM, SEM, PXRD, EDX, Raman spectroscopy, FTIR, N2-adsorption-desorption, CV, and EIS. The ZnS NPs/rGO modified glassy carbon electrode (GCE) was used to simultaneously estimate hydroxychloroquine (HCQ) and daclatasvir (DAC) in a binary mixture for the first time. The modified nanocomposite exhibited good catalytic activity towards HCQ and DAC detection. In addition, it showed higher sensitivity, good selectivity and stability; and high reproducibility towards HCQ and DAC analysis. The activity of the modified electrode was noticeably improved due to synergism between ZnS NPs and rGO. Under optimum conditions of DPV measurements, the anodic peak currents (Ipa) were obviously increased with the increase of HCQ and DAC amounts with linear ranges of 5.0-65.0 and 7.0-65.0 nM with LODs of 0.456 and 0.498 nM for HCQ and DAC, respectively. The ZnS NPs/ rGO modified GCE was used to quantify HCQ and DAC in biological fluids with recoveries of 98.7-102.7% and 96.9-104.5% and RSDs of 1.89-3.57% and 1.91-3.70%, respectively.
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Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia.,Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ali O AlQarni
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Yahya S A Alqahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
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Alshabi AM, Alkahtani SA, Shaikh IA, Habeeb MS. Caffeine modulates pharmacokinetic and pharmacodynamic profiles of pioglitazone in diabetic rats: Impact on therapeutics. Saudi Med J 2021; 42:151-160. [PMID: 33563733 PMCID: PMC7989285 DOI: 10.15537/smj.2021.2.25695] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 01/06/2021] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES To determine the influence of caffeine on pharmacokinetics and pharmacodynamics of pioglitazone (PIO) in diabetic rats. METHODS This was a preclinical study conducted in the College of Pharmacy, Najran University, Saudi Arabia, using 5 groups of Wistar rats: normal rats, untreated diabetic rats, diabetic rats + caffeine (20 mg/kg), diabetic rats + PIO (10 mg/kg), and diabetic rats + PIO (10 mg/kg) + caffeine (20 mg/kg). The drugs were administered for 14 days, and fasting plasma glucose concentrations were determined on the first day, and thereafter at weekly intervals. On day 14, rat sacrifice was followed with assay of levels of biomarkers. To estimate the pharmacokinetic parameters, the diabetic animals were assigned to 2 groups: one group received PIO (10 mg/kg), while the other received PIO + caffeine (20 mg/kg). Blood samples were drawn from the retro-orbital plexus at different time intervals, and pharmacokinetic parameters were measured using high performance liquid chromatography. RESULTS Caffeine caused statistically marked increases in area under the curve, Cmax, Tmax, and half-life of PIO, and decreased clearance. Combination of PIO and caffeine produced a synergistic effect on percentage reduction in blood glucose, with 67.1% reductions observed on day 7 and 68.9% reductions observed on day 14. Liver and cardiac biomarkers were significantly decreased, suggesting cardioprotective and hepatoprotective effects. CONCLUSION Co-administration of PIO with caffeine enhances its antidiabetic effect, probably due to enhanced bioavailability of PIO, leading to clinical benefits in diabetic patients.
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Affiliation(s)
- Ali M. Alshabi
- From the Department of Clinical Pharmacy (Alshabi, Alkahtani), and from the Department of Pharmacology (Shaikh, Habeeb), College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
| | - Saad A. Alkahtani
- From the Department of Clinical Pharmacy (Alshabi, Alkahtani), and from the Department of Pharmacology (Shaikh, Habeeb), College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
| | - Ibrahim A. Shaikh
- From the Department of Clinical Pharmacy (Alshabi, Alkahtani), and from the Department of Pharmacology (Shaikh, Habeeb), College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
| | - Mohammed S. Habeeb
- From the Department of Clinical Pharmacy (Alshabi, Alkahtani), and from the Department of Pharmacology (Shaikh, Habeeb), College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
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Alyami BA, Mahmoud AM, Alkahtani SA, El-Wekil MM. NiFe 2O 4 nanospheres functionalized with 2-(2, 4-Dihydroxyphenyl)-3, 5, 7-trihydroxychromen-4-one for selective solid-phase microextraction of aluminium. Talanta 2021; 226:122167. [PMID: 33676709 DOI: 10.1016/j.talanta.2021.122167] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 11/29/2022]
Abstract
Herein, a rational combination of dispersive solid-phase sorbent and 2-(2, 4-Dihydroxyphenyl)-3, 5, 7-trihydroxychromen-4-one (morin) was proposed for sensitive and selective determination of Al3+ ion. Nickel ferrite nanospheres (NiFe2O4 NS) functionalized with morin was used to preconcentrate and estimate Al3+ via the formation of fluorescent complex at pH 7.0. The functionalization was assisted by anionic surfactant sodium dodecyl sulphate (SDS) and ultrasonication. The results revealed that the fluorescence intensity of Al-morin/SDS@ NiFe2O4 NS is higher than Al-morin. Functionalization of NiFe2O4 NS with morin was confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), powder X-ray diffractometer (PXRD), and fluorescence spectroscopy. Under the optimum conditions, the fluorescence intensity increased with increasing of Al3+ concentrations in the range of 0.28-500.0 ng mL-1 with LOD (S/N = 3) of 0.09 ng mL-1. The method was applied for the determination of Al3+ in natural waters and human serum samples with recoveries % of 97-104% and RSDs % of 2-4%.
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Affiliation(s)
- Bandar A Alyami
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Alkahtani SA. Silver nanoparticles conjugated MnFe-based Prussian blue analogue for voltammetric and impedimetric bioaptasensing of amifostine (ethyol). Mikrochim Acta 2020; 187:576. [PMID: 32975672 DOI: 10.1007/s00604-020-04557-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/13/2020] [Indexed: 11/25/2022]
Abstract
A novel bioaptasensing-based electrochemical method for determination of amifostine (AMF) is proposed. The electrochemical aptasensor is based on modification of a glassy carbon electrode with a nanocomposite consisting of silver nanoparticles @ MnFe Prussian blue analogue nanospheres (AgNPs@MnFePBA NS), followed by immobilization of aptamer via Ag-N bonds (aptamer/AgNPs@MnFePBA NS/GCE). Experimental parameters including pH, incubation time, and aptamer concentrations were optimized. Electrochemical impedance spectroscopy (EIS) and differential pulse voltammetric (DPV) techniques were utilized to quantify AMF. The anodic peak current (∆Ipa) and charge transfer resistance (∆Rct) differences increase in the presence of AMF. Under the optimal conditions, using the redox probe, the electrochemical aptasensor exhibited linear ranges of 0.34-45 nmol L-1 and 0.69-45 nmol L-1 with LODs of 0.11 nmol L-1 and 0.23 nmol L-1 for EIS and DPV, respectively. The aptasensor was used to determine AMF in human plasma and in the presence of interfering species with recoveries and RSDs in the range 97.8-103.2% and 2.2-4.2%, respectively. Graphical abstract.
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Affiliation(s)
- Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Kingdom of Saudi Arabia.
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Abdel-Wahab BA, Ali FEM, Alkahtani SA, Alshabi AM, Mahnashi MH, Hassanein EHM. Hepatoprotective effect of rebamipide against methotrexate-induced hepatic intoxication: role of Nrf2/GSK-3β, NF-κβ-p65/JAK1/STAT3, and PUMA/Bax/Bcl-2 signaling pathways. Immunopharmacol Immunotoxicol 2020; 42:493-503. [PMID: 32865051 DOI: 10.1080/08923973.2020.1811307] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVES The fact that methotrexate (MTX) is hepatotoxic is an important reason to limit its clinical use. Rebamipide (REB) has antioxidant and anti-inflammatory properties and is useful for the treatment of gastro-duodenal ulcers. This study investigated the impact and protective mechanisms of REB against MTX-induced hepatotoxicity in rats. MATERIALS AND METHODS Animals were divided into four groups of six rats each: a control group, REB group (REB 100 mg/kg/day, orally), MTX control group (20 mg/kg, single i.p.), and MTX + REB group. RESULTS The administration of MTX induced marked hepatic injury in the form of hepatocyte inflammatory swelling, degeneration, apoptosis, and focal necrosis. In parallel, our biochemical investigations revealed a marked hepatic dysfunction associated with the disturbance of the oxidant/antioxidant balance in the group treated with only MTX. Moreover, MTX led to the down-regulation of the hepatic Nrf2 and Bcl-2 expressions along with a marked elevation in the hepatic NF-κβ-p65, GSK-3β, JAK1, STAT3, PUMA, and Bax expressions. On the other hand, co-treatment with REB significantly ameliorated the aforementioned histopathological, biochemical, and molecular defects caused by MTX treatment. CONCLUSION the outcomes of the present study showed REB's ability to protect from hepatic injury induced by MTX, possibly through its antioxidant, anti-inflammatory, and anti-apoptotic properties. These effects could be attributed to REB's ability to modulate, at least in part, the Nrf2/GSK-3β,NF-κβ-p65/JAK1/STAT3, and PUMA/Bax/Bcl-2signaling pathways.
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Affiliation(s)
- Basel A Abdel-Wahab
- Department of Pharmacology, College of Pharmacy, Najran University, Najran, Saudi Arabia.,Department of Medical Pharmacology, College of Medicine, Assiut University, Assiut, Egypt
| | - Fares E M Ali
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ali M Alshabi
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Emad H M Hassanein
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
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Mahmoud AM, Alkahtani SA, Alyami BA, El-Wekil MM. Dual-recognition molecularly imprinted aptasensor based on gold nanoparticles decorated carboxylated carbon nanotubes for highly selective and sensitive determination of histamine in different matrices. Anal Chim Acta 2020; 1133:58-65. [PMID: 32993874 DOI: 10.1016/j.aca.2020.08.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/28/2020] [Accepted: 08/01/2020] [Indexed: 12/31/2022]
Abstract
In this study, an electrochemical aptamer based sensor (aptasensor) was proposed for specific recognition of histamine (HIS). The electrochemical aptasensor based on fabrication of glassy carbon electrode (GCE) with molecular imprinted polymer (MIP) and DNA aptamers on gold nanoparticles (AuNPs) and carboxylated carbon nanotubes (cCNTs) (MIP-apta/AuNPs/cCNTs/GCE). The aptasensor exhibits high selectivity towards HIS detection as it has two recognition elements which are MIP cavities and aptamer interaction. Upon exposure of MIP-apt/AuNPs/cCNTs/GCE to HIS, the current of redox probe was decreased that depends on the template (HIS) concentration. The effects of aptamer concentration, incubation time, pH and AuNPs electro-deposition time were optimized. Differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) techniques were used to analyze HIS in complicated matrices. Favorable performance of MIP-apt/AuNPs/cCNTs/GCE was achieved with linearity ranges of 0.46-35 nmol L-1 and 0.35-35 nmol L-1 with limits of detection (LODs, S/N = 3) of 0.15 nmol L-1 and 0.11 nmol L-1 using DPV and EIS, respectively. The fabricated aptasensor displayed high selectivity, desirable reproducibility and stability. The MIP-apt/AuNPs/cCNTs/GCE was used to detect HIS in human plasma and canned tuna samples with good recoveries % and RSDs %.
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Affiliation(s)
- Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Bandar A Alyami
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Mahnashi MH, Mahmoud AM, Alkahtani SA, Ali R, El-Wekil MM. A novel imidazole derived colorimetric and fluorometric chemosensor for bifunctional detection of copper (II) and sulphide ions in environmental water samples. Spectrochim Acta A Mol Biomol Spectrosc 2020; 228:117846. [PMID: 31791910 DOI: 10.1016/j.saa.2019.117846] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/20/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
Herein, a novel "ON-OFF" colorimetric and fluorometric chemosensor; 1N-allyl-2-(2, 5-dimethoxyphenyl)-4, 5-diphenyl-1H-imidazole (ADPPI), was constructed for sequential determination of Cu2+ and S2- ions in aqueous media. The interaction between chemosensor ADPPI and different metal cations was investigated using UV-VIS and fluorimetric spectroscopy. ADPPI showed a favorable and good interaction with Cu2+ ions producing blue colored solution peaked at 610 nm with blue fluorescence at λem. = 447 nm. The produced complex between Cu2+ ions and ADPPI can be used as a cascade probe for detection of S2- ions. The detection limits (LODs) were 1.01 nM and 1.25 μM for Cu2+ and S2- ions, respectively (the lowest between the family of colorimetric and fluorometric chemosensors). To further increase the applicability of the proposed method, Cu2+ and S2- ions concentrations were measured in environmental water samples.
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Affiliation(s)
- Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ramadan Ali
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al-Azhar University, Assuit, Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
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Alkahtani SA, Mahmoud AM, Mahnashi MH, Ali R, El-Wekil MM. Facile fabrication of a novel 3D rose like lanthanum doped zirconia decorated reduced graphene oxide nanosheets: An efficient electro-catalyst for electrochemical reduction of futuristic anti-cancer drug salinomycin during pharmacokinetic study. Biosens Bioelectron 2020; 150:111849. [DOI: 10.1016/j.bios.2019.111849] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/16/2019] [Accepted: 11/02/2019] [Indexed: 12/29/2022]
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Mahmoud AM, El-Wekil MM, Mahnashi MH, Ali MFB, Alkahtani SA. Modification of N,S co-doped graphene quantum dots with p-aminothiophenol-functionalized gold nanoparticles for molecular imprint-based voltammetric determination of the antiviral drug sofosbuvir. Mikrochim Acta 2019; 186:617. [PMID: 31410574 DOI: 10.1007/s00604-019-3647-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 06/27/2019] [Indexed: 01/22/2023]
Abstract
A molecularly imprinted polymer (MIP) was developed for the electrochemical determination of the antiviral drug sofosbuvir (SOF). The MIP was obtained by polymerization of p-aminothiophenol (p-ATP) on N,S co-doped graphene quantum dots (N,S@GQDs) in the presence of gold nanoparticles to form gold-sulfur covalent network. The presence of quantum dots improves the electron transfer rate, enhances surface activity and amplifies the signal. The nanocomposites were characterized by FTIR, TEM, EDX, and SEM. The electrochemical performance of the electrode was investigated by differential pulse voltammetry and cyclic voltammetry. The sensor uses hexacyanoferrate as the redox probe and is best operated at a potential of around 0.36 V vs. Ag/AgCl. It has a linear response over the concentration range of 1-400 nM SOF, with a detection limit of 0.36 nM. Other features include high selectivity, good reproducibility and temporal stability. The sensor was applied to the determination of SOF in spiked human plasma. Graphical abstract Novel sofosbuvir imprinted p-ATP polymer was synthesized by the aid of gold nanoparticles on N,S co-doped graphene quantum dots as a good conductive support. The imprinted polymer was used for detection of sofosbuvir in real samples by using the ferri/ferrocyanide redox probe.
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Affiliation(s)
- Ashraf M Mahmoud
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, 11001, Saudi Arabia.,Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt
| | - Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt.
| | - Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, 11001, Saudi Arabia
| | - Marwa F B Ali
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, 11001, Saudi Arabia
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Alkahtani SA, Yakout SM, Reginster JY, Al-Daghri NM. Effect of acute downhill running on bone markers in responders and non-responders. Osteoporos Int 2019; 30:375-381. [PMID: 30151624 DOI: 10.1007/s00198-018-4673-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 08/14/2018] [Indexed: 11/26/2022]
Abstract
UNLABELLED This study showed that procollagen type 1 amino-terminal pro-peptide and N-MID osteocalcin significantly increased after exercise independent of the form of muscle contraction. Thus, these preliminary results will be useful for future studies that will consider bone turnover characteristics of responders and non-responders to acute and chronic aerobic exercise. INTRODUCTION The aim of the current study was to compare the effects of acute flat running (FR) and downhill running (DHR) on bone turnover markers in men. METHODS Fourteen healthy young active men performed three exercise tests in a counterbalanced order, including rest condition, FR, and DHR, at 60% maximal aerobic capacity on a treadmill with 0 and - 12% inclines. Blood samples were taken in the pre-exercise, immediately post-exercise, and 24-h post-exercise periods, and bone markers included total procollagen type 1 amino-terminal pro-peptide (total PINP) and N-MID osteocalcin. RESULTS Total P1NP significantly increased after exercise independent of the form of muscle contraction (p > 0.05). N-MID osteocalcin increased after DHR by 17% compared to after pre-exercise, but the difference did not reach significance (p = 0.07; partial eta square, 0.21). Biomarker responses to exercise were dependent on the exercise form and independent of hormone type in half of the participants who were classified as responders. Physiological parameters and changes in muscle voluntary contraction did not explain the differences between responders and non-responders. CONCLUSION The effect of acute DHR on bone turnover is determined by biomarker type and participant characteristics. Future studies should discriminate between the characteristics of responders and those of non-responders.
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Affiliation(s)
- S A Alkahtani
- Department of Exercise Physiology, College of Sport Sciences and Physical Activity, King Saud University, Riyadh, Saudi Arabia
| | - S M Yakout
- Prince Mutaib bin Abdullah Chair for Biomarkers Research on Osteoporosis, Department of Biochemistry, College of Science, King Saud University, PO Box, 2455, Riyadh, 11451, Saudi Arabia
| | - J-Y Reginster
- Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium
| | - N M Al-Daghri
- Prince Mutaib bin Abdullah Chair for Biomarkers Research on Osteoporosis, Department of Biochemistry, College of Science, King Saud University, PO Box, 2455, Riyadh, 11451, Saudi Arabia.
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El-Wekil MM, Alkahtani SA, Ali HRH, Mahmoud AM. Advanced sensing nanomaterials based carbon paste electrode for simultaneous electrochemical measurement of esomeprazole and diclofenac sodium in human serum and urine samples. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.120] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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El-Wekil MM, Mahmoud AM, Alkahtani SA, Marzouk AA, Ali R. A facile synthesis of 3D NiFe 2O 4 nanospheres anchored on a novel ionic liquid modified reduced graphene oxide for electrochemical sensing of ledipasvir: Application to human pharmacokinetic study. Biosens Bioelectron 2018; 109:164-170. [PMID: 29554476 DOI: 10.1016/j.bios.2018.03.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 02/24/2018] [Accepted: 03/08/2018] [Indexed: 01/17/2023]
Abstract
Novel and sensitive electrochemical sensor was fabricated for the assay of anti-HCV ledipasvir (LEDV) in different matrices. The designed sensor was based on 3D spinel ferromagnetic NiFe2O4 nanospheres and reduced graphene oxide (RGO) supported by morpholinium acid sulphate (MHS), as an ionic liquid (RGO/NSNiFe2O4/MHS). This sensor design was assigned to synergistically tailor the unique properties of nanostructured ferrites, RGO, and ionic liquid to maximize the sensor response. Electrode modification prevented aggregation of NiFe2O4, increasing electroactive surface area and allowed remarkable electro-catalytic oxidation of LEDV with an enhanced oxidation response. Differential pulse voltammetry was used for detection LEDV in complex matrices whereas; cyclic voltammetry and other techniques were employed to characterize the developed sensor properties. All experimental factors regarding sensor fabrication and chemical sensing properties were carefully studied and optimized. Under the optimum conditions, the designated sensor displayed a wide linear range (0.4-350 ng mL-1) with LOD of 0.133 ng mL-1. Additionally, the proposed sensor demonstrated good selectivity, stability and reproducibility, enabling the quantitative detection of LEDV in Harvoni® tablets, human plasma and in a pharmacokinetic study. Our findings suggest that the developed sensor is a potential prototype material for fabrication of high-performance electrochemical sensors.
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Affiliation(s)
- Mohamed M El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt.
| | - Ashraf M Mahmoud
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt; Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Kingdom of Saudia Arabia
| | - Saad A Alkahtani
- Department of Clinical Pharmacy, College of Pharmacy, Najran University, Najran, Kingdom of Saudia Arabia
| | - Adel A Marzouk
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al Azhar University, Assiut, Egypt
| | - Ramadan Ali
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al Azhar University, Assiut, Egypt
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