1
|
Mohammed MA, Amer NM, Abdallah HMI, Saleh MS. A comprehensive tool in recycling plant-waste of Gossypium barbadense L agricultural and industrial waste extracts containing gossypin and gossypol: hepatoprotective, anti-inflammatory and antioxidant effects. Plant Methods 2024; 20:54. [PMID: 38632634 PMCID: PMC11022478 DOI: 10.1186/s13007-024-01181-8] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/01/2024] [Indexed: 04/19/2024]
Abstract
Improper management of agricultural and industrial cotton wastes causes environmental pollution and worsens the climate change challenge. Green recycling of cotton could contribute to a circular economy. One of the economic values of cotton wastes lies in their bioactive components. Two types of cotton wastes-agricultural and industrial-of the species Gossypium barbadense L. Giza 95 were targeted in the current study, aiming to maximize their medicinal value and investigate the anti-inflammatory, hepatoprotective, and antioxidant activities of their phytochemical extracts. Phytochemical extraction was performed using different solvents extraction. An anti-inflammatory effect was tested in carrageenan-induced acute edema in a rat paw model. A carbon tetrachloride chronic model of liver injury was used for the assessment of hepatoprotective potential. Liver enzymes (AST and ALT), oxidative stress markers (MDA and GSH), inflammatory biomarkers (C-reactive protein), and histopathological features were investigated. As a result, ethyl acetate proved to be the solvent of best choice to extract the gossypin polyphenolics, where the extracted amount reached 14,826.2 µg/g, followed by butanol (8751.4 µg/g extract). The chloroform (CHCL3) fraction showed the highest amounts of gossypol (190.7 µg/g extract), followed by petroleum ether. Cotton waste's composition analysis showed a wide range of components, including 33 metabolites such as gossypetin, polyphenolics, and other metabolites that possess therapeutic effects. Both chloroform extract and industrial waste extracts showed superior anti-inflammatory and hepatoprotective effects in comparison to other extracts. All tested extracts (ethyl acetate, chloroform, and industrial waste) showed proper antioxidant activities.
Collapse
Affiliation(s)
- Mona A Mohammed
- Medicinal and Aromatic Plants Research Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Giza, Egypt.
| | - Nagat M Amer
- Environmental and Occupational Medicine Department, Environment and Climate Change Research Institute, National Research Centre, Dokki, Giza, Egypt
| | - Heba M I Abdallah
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Giza, Egypt
| | - Mai S Saleh
- Environmental and Occupational Medicine Department, Environment and Climate Change Research Institute, National Research Centre, Dokki, Giza, Egypt
| |
Collapse
|
2
|
Ali IH, Hassan RM, El Kerdawy AM, Abo-Elfadl MT, Abdallah HMI, Sciandra F, Ghannam IAY. Novel thiazolidin-4-one benzenesulfonamide hybrids as PPARγ agonists: Design, synthesis and in vivo anti-diabetic evaluation. Eur J Med Chem 2024; 269:116279. [PMID: 38460271 DOI: 10.1016/j.ejmech.2024.116279] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/12/2024] [Accepted: 02/21/2024] [Indexed: 03/11/2024]
Abstract
In the current study, two series of novel thiazolidin-4-one benzenesulfonamide arylidene hybrids 9a-l and 10a-f were designed, synthesized and tested in vitro for their PPARɣ agonistic activity. The phenethyl thiazolidin-4-one sulphonamide 9l showed the highest PPARɣ activation % by 41.7%. Whereas, the 3-methoxy- and 4-methyl-4-benzyloxy thiazolidin-4-one sulphonamides 9i, and 9k revealed moderate PPARɣ activation % of 31.7, and 32.8%, respectively, in addition, the 3-methoxy-3-benzyloxy thiazolidin-4-one sulphonamide 10d showed PPARɣ activation % of 33.7% compared to pioglitazone. Compounds 9b, 9i, 9k, 9l, and 10d revealed higher selectivity to PPARɣ over the PPARδ, and PPARα isoforms. An immunohistochemical study was performed in HepG-2 cells to confirm the PPARɣ protein expression for the most active compounds. Compounds 9i, 9k, and 10d showed higher PPARɣ expression than that of pioglitazone. Pharmacological studies were also performed to determine the anti-diabetic activity in rats at a dose of 36 mg/kg, and it was revealed that compounds 9i and 10d improved insulin secretion as well as anti-diabetic effects. The 3-methoxy-4-benzyloxy thiazolidin-4-one sulphonamide 9i showed a better anti-diabetic activity than pioglitazone. Moreover, it showed a rise in blood insulin by 4-folds and C-peptide levels by 48.8%, as well as improved insulin sensitivity. Moreover, compound 9i improved diabetic complications as evidenced by decreasing liver serum enzymes, restoration of total protein and kidney functions. Besides, it combated oxidative stress status and exerted anti-hyperlipidemic effect. Compound 9i showed a superior activity by normalizing some parameters and amelioration of pancreatic, hepatic, and renal histopathological alterations caused by STZ-induction of diabetes. Molecular docking studies, molecular dynamic simulations, and protein ligand interaction analysis were also performed for the newly synthesized compounds to investigate their predicted binding pattern and energies in PPARɣ binding site.
Collapse
Affiliation(s)
- Islam H Ali
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Rasha M Hassan
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt
| | - Ahmed M El Kerdawy
- School of Pharmacy, College of Health and Science, University of Lincoln, Joseph Banks Laboratories, Green Lane, Lincoln, United Kingdom; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Mahmoud T Abo-Elfadl
- Cancer Biology and Genetics Laboratory, Centre of Excellence for Advanced Sciences, National Research Centre, Dokki, Cairo 12622, Egypt; Biochemistry Department, Biotechnology Research Institute, National Research Centre, Dokki, Cairo, Egypt
| | - Heba M I Abdallah
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Francesca Sciandra
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta"- SCITEC (CNR) Sede di Roma, Largo F. Vito 1, 00168 Roma, Italy
| | - Iman A Y Ghannam
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt.
| |
Collapse
|
3
|
El-Dakroury WA, Zewail MB, Asaad GF, Abdallah HMI, Shabana ME, Said AR, Doghish AS, Azab HA, Amer DH, Hassan AE, Sayed AS, Samra GM, Sallam AAM. Fexofenadine-loaded chitosan coated solid lipid nanoparticles (SLNs): A potential oral therapy for ulcerative colitis. Eur J Pharm Biopharm 2024; 196:114205. [PMID: 38311187 DOI: 10.1016/j.ejpb.2024.114205] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/22/2024] [Accepted: 01/30/2024] [Indexed: 02/10/2024]
Abstract
The targeting and mucoadhesive features of chitosan (CS)-linked solid lipid nanoparticles (SLNs) were exploited to efficiently deliver fexofenadine (FEX) into the colon, forming a novel and potential oral therapeutic option for ulcerative colitis (UC) treatment. Different FEX-CS-SLNs with varied molecular weights of CS were prepared and optimized. Optimized FEX-CS-SLNs exhibited 229 ± 6.08 nm nanometric size, 36.3 ± 3.18 mV zeta potential, 64.9 % EE, and a controlled release profile. FTIR, DSC, and TEM confirmed good drug entrapment and spherical particles. Mucoadhesive properties of FEX-CS-SLNs were investigated through mucin incubation and exhibited considerable mucoadhesion. The protective effect of FEX-pure, FEX-market, and FEX-CS-SLNs against acetic acid-induced ulcerative colitis in rats was examined. Oral administration of FEX-CS-SLNs for 14 days before ulcerative colitis induction reversed UC symptoms and almost restored the intestinal mucosa to normal integrity and inhibited Phosphatidylinositol-3 kinase (73.6 %), protein kinase B (73.28 %), and elevated nuclear factor erythroid 2-related factor 2 (185.9 %) in colonic tissue. Additionally, FEX-CS-SLNs inhibited tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6) to (70.79 % & 72.99 %) in colonic tissue. The ameliorative potential of FEX-CS-SLNs outperformed that of FEX-pure and FEX-market. The exceptional protective effect of FEX-CS-SLNs makes it a potentially effective oral system for managing ulcerative colitis.
Collapse
Affiliation(s)
- Walaa A El-Dakroury
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt.
| | - Moataz B Zewail
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt; School of Chemical Engineering, Faculty of Sciences, Engineering and Technology, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Gihan F Asaad
- Department of Pharmacology, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Heba M I Abdallah
- Department of Pharmacology, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Marwa E Shabana
- Pathology Department, National Research Centre, Dokki, Giza, Egypt
| | - Abdelrahman R Said
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Ahmed S Doghish
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City 11829, Cairo, Egypt; Department of Biochemistry and Molecular Biology Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City 11651, Cairo, Egypt
| | - Hadeer A Azab
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Dalia H Amer
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Ahmed E Hassan
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Alaa S Sayed
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Ghada M Samra
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Al-Aliaa M Sallam
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City 11829, Cairo, Egypt; Biochemistry Department, Faculty of Pharmacy, Ain-Shams University, Abassia, Cairo 11566, Egypt
| |
Collapse
|
4
|
Ammar NM, Hassan HA, Abdallah HMI, Afifi SM, Elgamal AM, Farrag ARH, El-Gendy AENG, Farag MA, Elshamy AI. Correction: Ammar et al. Protective Effects of Naringenin from Citrus sinensis (var. Valencia) Peels against CCl 4-Induced Hepatic and Renal Injuries in Rats Assessed by Metabolomics, Histological and Biochemical Analyses. Nutrients 2022, 14, 841. Nutrients 2024; 16:394. [PMID: 38337749 PMCID: PMC10857019 DOI: 10.3390/nu16030394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 01/17/2024] [Indexed: 02/12/2024] Open
Abstract
In the original publication [...].
Collapse
Affiliation(s)
- Naglaa M. Ammar
- Therapeutic Chemistry Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
| | - Heba A. Hassan
- Therapeutic Chemistry Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
| | - Heba M. I. Abdallah
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza 12622, Egypt;
| | - Sherif M. Afifi
- Pharmacognosy Department, Faculty of Pharmacy, University of Sadat City, Sadat City 32897, Egypt
| | - Abdelbaset M. Elgamal
- Chemistry of Microbial and Natural Products Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt;
| | - Abdel Razik H. Farrag
- Department of Pathology, Medical Research and Clinical Studies Institute, National Research Centre, Giza 12622, Egypt;
| | - Abd El-Nasser G. El-Gendy
- Medicinal and Aromatic Plants Research Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Cairo 12622, Egypt;
| | - Mohamed A. Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Cairo 11562, Egypt;
- School of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou 311300, China
| | - Abdelsamed I. Elshamy
- Chemistry of Natural Compounds Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt
| |
Collapse
|
5
|
Abdallah HMI, Asaad GF, Arbid MS, Nomier YA. Antihyperlipidemic, anti-inflammatory, analgesic, and antipyretic activities of "dimethyl dimethoxy biphenyl dicarboxylate" in male Wistar rats. J Adv Pharm Technol Res 2022; 13:83-88. [PMID: 35464660 PMCID: PMC9022363 DOI: 10.4103/japtr.japtr_292_21] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 12/18/2021] [Accepted: 01/11/2022] [Indexed: 11/04/2022] Open
Abstract
Dimethyl dimethoxy biphenyl (DDB) dicarboxylate has been applied as a therapeutic modality for curing liver diseases, particularly hepatitis virus. The objective of this study was to assess the protective potential against Triton X-100 induced abnormal fat metabolism in addition to anti-inflammatory, analgesic, and antipyretic effects of DDB. The anti-inflammatory, antinociceptive, and antipyretic of DDB were investigated through induction of paw edema, pain, and fever in experimental rats. DDB decreased cholesterol and triglyceride contents. DDB resulted in inhibition of inflammation, nociception, and fever in the experimental models. DDB improved lipid profile, as evidence of hypolipidemic potential. It also showed anti-inflammatory, analgesic, and antipyretic properties.
Collapse
Affiliation(s)
- Heba M I Abdallah
- Department of Pharmacology, Division of Medical Sciences, National Research Centre, Dokki, Giza, Egypt
| | - Gihan F Asaad
- Department of Pharmacology, Division of Medical Sciences, National Research Centre, Dokki, Giza, Egypt
| | - Mahmoud S Arbid
- Department of Pharmacology, Division of Medical Sciences, National Research Centre, Dokki, Giza, Egypt
| | - Yousra A Nomier
- Department of Pharmacology and Toxicology, Pharmacy College, Jazan University, Jazan, Saudi Arabia
| |
Collapse
|
6
|
Ammar NM, Hassan HA, Abdallah HMI, Afifi SM, Elgamal AM, Farrag ARH, El-Gendy AENG, Farag MA, Elshamy AI. Protective Effects of Naringenin from Citrus sinensis (var. Valencia) Peels against CCl 4-Induced Hepatic and Renal Injuries in Rats Assessed by Metabolomics, Histological and Biochemical Analyses. Nutrients 2022; 14:841. [PMID: 35215494 PMCID: PMC8924893 DOI: 10.3390/nu14040841] [Citation(s) in RCA: 18] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/10/2022] [Accepted: 02/14/2022] [Indexed: 02/07/2023] Open
Abstract
Citrus fruits are grown worldwide for their special nutritive and several health benefits. Among citrus bioactives, naringenin, a major flavanone, exhibits a potential hepatoprotective effect that is not fully elucidated. Herein, serum biochemical parameters and histopathological assays were used to estimate the hepatoprotective activity of naringenin, isolated from Citrus sinensis (var. Valencia) peels, in CCl4-induced injury in a rat model. Further, GC-MS-based untargeted metabolomics was used to characterize the potential metabolite biomarkers associated with its activity. Present results revealed that naringenin could ameliorate the increases in liver enzymes (ALT and AST) induced by CCl4 and attenuate the pathological changes in liver tissue. Naringenin decreased urea, creatinine and uric acid levels and improved the kidney tissue architecture, suggesting its role in treating renal disorders. In addition, naringenin increased the expression of the antiapoptoic cell marker, Bcl-2. Significant changes in serum metabolic profiling were noticed in the naringenin-treated group compared to the CCl4 group, exemplified by increases in palmitic acid, stearic acid, myristic acid and lauric acids and decrease levels of alanine, tryptophan, lactic acid, glucosamine and glucose in CCl4 model rats. The results suggested that naringenin's potential hepato- and renoprotective effects could be related to its ability to regulate fatty acids (FAs), amino acids and energy metabolism, which may become effective targets for liver and kidney toxicity management. In conclusion, the current study presents new insights into the hepato- and renoprotective mechanisms of naringenin against CCl4-induced toxicity.
Collapse
Affiliation(s)
- Naglaa M. Ammar
- Therapeutic Chemistry Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
| | - Heba A. Hassan
- Therapeutic Chemistry Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
| | - Heba M. I. Abdallah
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Giza 12622, Egypt;
| | - Sherif M. Afifi
- Pharmacognosy Department, Faculty of Pharmacy, University of Sadat City, Sadat City 32897, Egypt;
| | - Abdelbaset M. Elgamal
- Chemistry of Microbial and Natural Products Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt;
| | - Abdel Razik H. Farrag
- Department of Pathology, Medical Research and Clinical Studies Institute, National Research Centre, Giza 12622, Egypt;
| | - Abd El-Nasser G. El-Gendy
- Medicinal and Aromatic Plants Research Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Cairo 12622, Egypt;
| | - Mohamed A. Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Cairo 11562, Egypt;
- School of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou 311300, China
| | - Abdelsamed I. Elshamy
- Chemistry of Natural Compounds Department, Pharmaceutical and Drugs Research Institute, National Research Centre, Giza 12622, Egypt
| |
Collapse
|
7
|
Hassan RM, Ali IH, Abdel-Maksoud MS, Abdallah HMI, El Kerdawy AM, Sciandra F, Ghannam IAY. Design and synthesis of novel quinazolinone-based fibrates as PPARα agonists with antihyperlipidemic activity. Arch Pharm (Weinheim) 2021; 355:e2100399. [PMID: 34958132 DOI: 10.1002/ardp.202100399] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 11/11/2022]
Abstract
Aiming to discover new antihyperlipidemic agents, a new set of quinazolinone-fibrate hybrids 9a-r bearing the essential features for peroxisome proliferator-activated receptor-α (PPARα) agonistic activity was synthesized and the structures were confirmed by different spectral data. All the target compounds were screened for their PPARα agonistic activity. Compounds 9o and 9q exhibited potent activity, with EC50 values better than that of fenofibrate by 8.7- and 27-fold, respectively. Molecular docking investigations were performed for all the newly synthesized compounds in the active site of the PPARα receptor to study their interactions and energies in the receptor. Moreover, the antihyperlipidemic and antioxidant activities of compounds 9o and 9q were determined using Triton WR-1339-induced hyperlipidemic rats. Compound 9q exhibited effective hypolipidemic activity in a dose-dependent manner, where it significantly reduced the serum levels of total cholesterol, triglycerides, low-density lipoprotein cholesterol, and very-low-density lipoprotein cholesterol and increased the level of high-density lipoprotein cholesterol. Furthermore, it possesses a powerful antioxidant profile where it significantly elevated the levels of reduced glutathione as well as the total antioxidant capacity and significantly decreased the malondialdehyde level. The histopathological studies revealed that compound 9q improved the aortic architecture and hepatic steatosis. These findings support that compound 9q could be a promising lead compound for the development of new antihyperlipidemic agents.
Collapse
Affiliation(s)
- Rasha M Hassan
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), Dokki, Giza, Egypt
| | - Islam H Ali
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo, Egypt
| | - Mohammed S Abdel-Maksoud
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), Dokki, Giza, Egypt
| | - Heba M I Abdallah
- Pharmacology Department, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo, Egypt
| | - Ahmed M El Kerdawy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt.,Department of Organic and Pharmaceutical Chemistry, School of Pharmacy, Newgiza University (NGU), Newgiza, Cairo, Egypt
| | - Francesca Sciandra
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta"-SCITEC (CNR) Sede di Roma, Roma, Italy
| | - Iman A Y Ghannam
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo, Egypt
| |
Collapse
|
8
|
Ezzat SM, Abdallah HMI, Yassen NN, Radwan RA, Mostafa ES, Salama MM, Salem MA. Phenolics from Physalis peruviana fruits ameliorate streptozotocin-induced diabetes and diabetic nephropathy in rats via induction of autophagy and apoptosis regression. Biomed Pharmacother 2021; 142:111948. [PMID: 34385108 DOI: 10.1016/j.biopha.2021.111948] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 11/28/2022] Open
Abstract
The objective of our study was to evaluate the effect of Physalis peruviana L. fruits in the management of diabetes and diabetic nephropathy in relation to its metabolic profile. In-vitro α-amylase, β-glucosidase, and lipase inhibition activities were assessed for the ethanolic extract (EtOH) and its subfractions. Ethyl acetate (EtOAc) fraction showed the highest α-amylase, β-glucosidase, and lipase inhibition effect. In vivo antihyperglycemic testing of EtOAc in streptozotocin (STZ)-induced diabetic rats showed that it decreased the blood glucose level, prevented the reduction in body weight, improved serum indicators of kidney injury (urea, uric acid, creatinine), and function (albumin and total protein). EtOAc increased autophagic parameters (LC3B, AMPK) and depressed mTOR contents. Histopathology revealed that EtOAc ameliorated the pathological features and decreased the glycogen content induced by STZ. The immunohistochemical analysis showed that EtOAc reduced P53 expression as compared to the STZ-diabetic group. UPLC-ESI-MS/MS metabolite profiling of EtOAc allowed the identification of several phenolic compounds. Among the isolated compounds, gallic acid, its methylated dimer and the glycosides of quercetin had promising α-amylase and β-glucosidase inhibition activity. The results suggest that the phenolic-rich fraction has a protective effects against diabetic nephropathy presumably via enhancing autophagy (AMPK/mTOR pathway) and prevention of apoptosis (P53 suppression).
Collapse
Affiliation(s)
- Shahira M Ezzat
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt; Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza 12451, Egypt.
| | - Heba M I Abdallah
- Department of Pharmacology, Medical Research Division, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Cairo, Egypt.
| | - Noha N Yassen
- Department of Pathology, Medical Research Division, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Cairo, Egypt.
| | - Rasha A Radwan
- Department of Biochemistry, Faculty of Pharmacy, Sinai University, East Kantara Branch, New City El Ismailia 41611, Egypt.
| | - Eman S Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza 12451, Egypt.
| | - Maha M Salama
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo 11562, Egypt; Department of Pharmacognosy, Faculty of Pharmacy, The British University in Egypt, El Sherouk City, Suez Desert Road, Cairo 11837, Egypt.
| | - Mohamed A Salem
- Department of Pharmacognosy, Faculty of Pharmacy, Menoufia University, Gamal Abd El Nasr st., Shibin Elkom 32511, Menoufia, Egypt.
| |
Collapse
|
9
|
Abdallah HMI, Abdel Jaleel GA, Mohammed HS, Mahmoud SS, Yassin NA, Gamal el Din A, Shaffie NM, Bassyouni FA. Phytochemical Screening, Gas Chromatography-mass Spectrometry Analysis, and Antidiabetic Effects of Corchorus olitorius Leaves in Rats. Open Access Maced J Med Sci 2020. [DOI: 10.3889/oamjms.2020.3796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Therapies for diabetes mellitus are still meeting failure in most cases, especially in the developed stages of the disease due to incredible associating complications. Hence, there is a need for continuous development of curative therapies for that stubborn disease.
AIM: We aimed to investigate the antidiabetic effects of one of the most popular plants cultivated in Egypt, C. olitorius.
METHODS: Phytochemical screening of total alcoholic extract of Corchorus olitorius leaves and its aqueous and chloroform fractions revealed the presence of flavonoids, saponins, carbohydrates, tannins, coumarins, and alkaloids.
RESULTS: The gas chromatography-mass spectrometry analysis showed the presence of 12 and nine chemical compounds in aqueous and chloroform extracts, respectively. C. olitorius decreased serum glucose level and α-amylase activity. This effect was more pronounced in the total alcoholic extract and its chloroform fraction than the aqueous one. The extracts also adjusted the lipid profile, reduced liver injury parameters, and caused remarkable improvement and increase number, size, and density of functioning β-cells.
CONCLUSION: The findings suggest the antihyperglycemic and antioxidant effects of C. olitorius besides its beneficial effect on diabetic complications such as hyperlipidemia and liver injury. The presence of some phytochemicals such as theophylline, trans-2, 3-dimethoxycinnamic acid, 7-hydroxy-4-methyl coumarin, apigenin 7-glucoside, and glycitein may contribute to such pharmacological effects.
Collapse
|
10
|
Farrag ARH, Abdallah HMI, Khattab AR, Elshamy AI, Gendy AENGE, Mohamed TA, Farag MA, Efferth T, Hegazy MEF. Antiulcer activity of Cyperus alternifolius in relation to its UPLC-MS metabolite fingerprint: A mechanistic study. Phytomedicine 2019; 62:152970. [PMID: 31181403 DOI: 10.1016/j.phymed.2019.152970] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 03/09/2019] [Revised: 05/14/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Gastric ulcer is one of the main prevalent gastrointestinal multi-etiological disorders with many associated complications and adverse effects. Our aim was to develop safer antiulcer therapies based on methanol or ethyl acetate extracts of tubers and aerial parts from Cyperus alternifolius. METHODS Gastric ulceration was experimentally generated by administration of single oral doses of indomethacin (30 mg/kg) to fasted rats. The animals received methanol or ethyl acetate extracts of C. alternifolius tuber and methanol or ethyl acetate extracts of aerial parts at two dose levels (50 or 100 mg/kg). Ranitidine (50 mg/kg) was used as standard anti-ulcer drug. After 4 h, the ulcer number and the total ulcer score were determined and TNF-α was assessed. Also, pathological and histochemical examination for gastric mucosa were performed. The metabolome heterogeneity of the different extracts was explored using (UPLC-MS) aided by supervised pattern recognition, i.e., orthogonal partial least squares discriminate analysis (OPLS-DA). A second OPLS-DA model was employed to link the UPLC-MS derived metabolome of the different extracts to their antiulcer activity to identify activity mediating metabolites. RESULTS The extracts significantly reduced ulcer number, total ulcer score and TNF-α content in the stomach. Methanol or ethyl acetate extracts of tubers were most effective even more than ranitidine. In parallel, the histopathological examination showed an improvement of damaged mucosa. A high PAS reaction was observed in the treated groups indicating a relieve of the mucosal layer. A mechanistic clue of the C. alternifolius antiulcer potential was provided by the identification of its bioactive compounds using OPLS-DA. Both methanol extracts of tubers and aerial parts were more enriched in phenolic acids. The ethyl acetate extract of the aerial part was more abundant in two aldehydes. A mechanism of action was postulated based on their reported actions viz. α-carbonic anhydrase inhibition, anti-inflammatory and analgesic activity by its antioxidant activity and downregulation of several inflammatory mediators. CONCLUSION This is the first study to report on the antiulcer activity of C. alternifolius tubers with identification of the key bioactive compounds and the mode of action. Future phytochemical and biological evaluation of the identified bioactive compounds are needed to confirm the plant tubers as safer alternative or adjunct therapy compared to conventional antiulcer drugs.
Collapse
Affiliation(s)
| | - Heba M I Abdallah
- Pharmacology Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - Amira R Khattab
- Pharmacognosy Department, Division of Pharmaceutical Sciences, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport, Alexandria 1029, Egypt
| | - Abdelsamed I Elshamy
- Department of Natural Compounds Chemistry, National Research Centre, Dokki, Giza 12622, Egypt; Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514, Japan
| | - Abd El-Nasser G El Gendy
- Medicinal and Aromatic Plants Research Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, Egypt
| | - Tarik A Mohamed
- Chemistry of Medicinal Plants Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr el Aini St., P.B. 11562, Cairo, Egypt; Chemistry Department, School of Sciences & Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudinger Weg 5, Mainz 55128, Germany.
| | - Mohamed-Elamir F Hegazy
- Chemistry of Medicinal Plants Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt; Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudinger Weg 5, Mainz 55128, Germany
| |
Collapse
|
11
|
Mansour DF, Abdallah HMI, Ibrahim BMM, Hegazy RR, Esmail RSE, Abdel-Salam LO. The Carcinogenic Agent Diethylnitrosamine Induces Early Oxidative Stress, Inflammation and Proliferation in Rat Liver, Stomach and Colon: Protective Effect of Ginger Extract. Asian Pac J Cancer Prev 2019; 20:2551-2561. [PMID: 31450931 PMCID: PMC6852799 DOI: 10.31557/apjcp.2019.20.8.2551] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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: 02/16/2019] [Accepted: 08/18/2019] [Indexed: 12/15/2022] Open
Abstract
Background: Diethylnitrosamine (DENA), a well-known dietary carcinogen, related to cancer initiation of various organs. The present study investigated the deleterious mechanisms involved in the early destructive changes of DENA in different organs namely, liver, stomach and colon and the potential protective effect of GE against these mechanisms. Methods: Adult male albino rats were assigned into four groups. A normal control group received the vehicle, another group was injected with a single necrogenic dose of DENA (200 mg/kg, i.p) on day 21. Two groups received oral GE (108 or 216 mg/kg) daily for 28 days. Sera, liver, stomach and colon were obtained 7 days after DENA injection. Serum aspartate transaminase and alanine transaminase were detected as well as reduced glutathione (GSH), malondialdehyde, nitric oxide metabolites, interleukin 1β, tumor necrosis factor (TNF-α), alpha-fetoprotein (AFP) and nuclear factorerythroid 2-related factor2 (Nrf2) in liver, stomach and colon. Histopathological studies and immunohistochemical examination of cyclooxygenase-2 (COX2) were conducted. Results: DENA induced elevation in liver function enzymes with significant increase in oxidation and inflammation biomarkers and AFP while decreased levels of Nrf2 in liver, stomach and colon were detected. Histologically, DENA showed degenerative changes in hepatocytes and inflammatory foci. Inflammatory foci displayed increased expression of COX2 in immunohistochemical staining. GE-pretreatment improved liver function and restored normal GSH with significant mitigation of oxidative stress and inflammatory biomarkers compared to DENA-treated group. AFP was reduced by GE in both doses, while Nrf2 increased significantly. Histology and immunostaining of hepatic COX-2 were remarkably improved in GE-treated groups in a dose dependent manner. Conclusion: GE exerted a potential anti-proliferative activity against DENA in liver, stomach and colon via Nrf2 activation, whilst suppression of oxidation and inflammation.
Collapse
Affiliation(s)
- Dina F Mansour
- Pharmacology Department, Medical Division, National Research Centre, 33 EL Bohouth St. (former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
- Department of Clinical Pharmacy and Pharmacy Practice,, Faculty of Pharmacy, Ahram Canadian University, Egypt
| | - Heba M I Abdallah
- Pharmacology Department, Medical Division, National Research Centre, 33 EL Bohouth St. (former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
| | - Bassant M M Ibrahim
- Pharmacology Department, Medical Division, National Research Centre, 33 EL Bohouth St. (former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
| | - Rehab R Hegazy
- Pharmacology Department, Medical Division, National Research Centre, 33 EL Bohouth St. (former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
| | - Reham S E Esmail
- Department of Pathology, Faculty of Medicine, Fayoum University, Egypt
| | | |
Collapse
|
12
|
Abdallah HMI, Abdel-Rahman RF, El Awdan SA, Allam RM, El-Mosallamy AEMK, Selim MS, Mohamed SS, Arbid MS, Farrag ARH. Protective effect of some natural products against chemotherapy-induced toxicity in rats. Heliyon 2019; 5:e01590. [PMID: 31080906 PMCID: PMC6507045 DOI: 10.1016/j.heliyon.2019.e01590] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 08/01/2018] [Revised: 03/01/2019] [Accepted: 04/24/2019] [Indexed: 02/07/2023] Open
Abstract
Aim There is a great interest in combining anticancer drugs with natural products aiming at maximizing their efficacy while minimizing systemic toxicity. Hence, the present study was constructed aiming to investigate the protective potential of three natural products, 1,8-cineole an essential oil from Artemisia herba alba, exopolysaccharide (EPS) from locally identified marine streptomycete, and ellagic acid (EA), against chemotherapy-induced organ toxicity. Methods Isolation, production and characterization of EPS from marine streptomycete was done. Animals were allocated into five groups, GP1: normal control, GP2: cyclophosphamide (CYC), GP3: 1,8-cineole + CYC, GP4: EPS + CYC, GP4: EA + CYC. All drugs were administered orally 1 week before and concomitantly with CYC. Electrocardiography (ECG) analysis, liver enzymes (ALT and AST), cardiac serum markers (LDH and CK), oxidative stress biomarkers in hepatic and cardiac tissues (GSH and MDA), TGF-β1 and histopathological examination of hepatic and cardiac tissues were executed. Results The isolated stain produced EPS was identified as Streptomyces xiamenensis. EPS contains uronic, sulphate groups and different monosugars with Mw 4.65 × 104 g/mol and showed antioxidant activity against DPPH. Pretreatment of rats with 1,8-cineole, EPS and EA improved ECG abnormalities, decrease serum markers of hepato- and cardiotoxicity, prevent oxidative stress and decrease TGF-β1 in liver and heart tissues. Conclusion The present results demonstrate the hepatoprotective and cardioprotective effects of the above-mentioned natural products against CYC organ toxicity.
Collapse
Affiliation(s)
- Heba M I Abdallah
- Department of Pharmacology, Medical Division, National Research Centre, Giza, Egypt
| | - Rehab F Abdel-Rahman
- Department of Pharmacology, Medical Division, National Research Centre, Giza, Egypt
| | - Sally A El Awdan
- Department of Pharmacology, Medical Division, National Research Centre, Giza, Egypt
| | - Rasha M Allam
- Department of Pharmacology, Medical Division, National Research Centre, Giza, Egypt
| | | | - Manal S Selim
- Department of Microbial Biotechnology, Genetic Engineering and Biotechnology Research Division, National Research Centre, Giza, Egypt
| | - Sahar S Mohamed
- Department of Microbial Biotechnology, Genetic Engineering and Biotechnology Research Division, National Research Centre, Giza, Egypt
| | - Mahmoud S Arbid
- Department of Pharmacology, Medical Division, National Research Centre, Giza, Egypt
| | - Abdel Razik H Farrag
- Department of Pathology, Medical Division, National Research Centre, Giza, Egypt
| |
Collapse
|
13
|
Mahmoud HM, Osman M, Elshabrawy O, Abdallah HMI, Khairallah A. AM-1241 CB2 Receptor Agonist Attenuates Inflammation, Apoptosis and Stimulate Progenitor Cells in Bile Duct Ligated Rats. Open Access Maced J Med Sci 2019; 7:925-936. [PMID: 30976335 PMCID: PMC6454175 DOI: 10.3889/oamjms.2019.194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 12/14/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND: The cannabinoid receptor 2 (CB2) plays a pleiotropic role in the innate immunity and is considered a crucial mediator of liver disease. Cannabinoid CB2 receptor activation has been reported to attenuate liver fibrosis in CCl4 exposed mice and also plays a potential role in liver regeneration in a mouse model of I/R and protection against alcohol-induced liver injury. AIM: In this study, we investigated the impact of CB2 receptors on the antifibrotic and regenerative process associated with cholestatic liver injury. METHODS: Twenty-six rats had bile duct ligation co-treated with silymarin and AM1241 for 3 consecutive weeks. Serum hepatotoxicity markers were determined, and histopathological evaluation was performed. RESULTS: Following bile duct ligation (BDL) for 3 weeks, there was increased aminotransferase levels, marked inflammatory infiltration and hepatocyte apoptosis with induced oxidative stress, as reflected by increased lipid peroxidation. Conversely, following treatment with the CB2 agonist, AM-1241, BDL rats displayed a reduction in liver injury and attenuation of fibrosis as reflected by expression of hydroxyproline and α-smooth muscle actin. AM1241 treatment also significantly attenuated lipid peroxidation end-products, p53-dependent apoptosis and also attenuated inflammatory process by stimulating IL-10 production. Moreover, AM1241 treated rats were associated with significant expression of hepatic progenitor/oval cell markers. CONCLUSION: In conclusion, this study points out that CB2 receptors reduce liver injury and promote liver regeneration via distinct mechanisms including IL-10 dependent inhibition of inflammation, reduction of p53-reliant apoptosis and through stimulation of oval/progenitor cells. These results suggest that CB2 agonists display potent hepatoregenrative properties, in addition to their antifibrogenic effects.
Collapse
Affiliation(s)
- Hesham M Mahmoud
- Cairo University Kasr Alainy, Faculty of Medicine, Pharmacology, Cairo, Egypt
| | - Mona Osman
- Cairo University Kasr Alainy, Faculty of Medicine, Pharmacology, Cairo, Egypt
| | | | | | - Ahmed Khairallah
- Pharmacology Department, National Research Centre, Dokki, Cairo 11211, Egypt
| |
Collapse
|
14
|
Elshamy AI, El-Kashak WA, Abdallah HMI, Farrag AH, Nassar MI. Soft coral Cespitularia stolonifera: New cytotoxic ceramides and gastroprotective activity. Chin J Nat Med 2017; 15:105-114. [PMID: 28284424 DOI: 10.1016/s1875-5364(17)30026-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 04/17/2015] [Indexed: 11/29/2022]
Abstract
In the present study, a new ceramide, namely 2S, 3R-4E, 8E-2-(heptadecanoylamino)-heptadeca-4, 8-diene-1, 3-diol (1), along with four known steroids, including 24-methylcholesta-5, 24(28)-diene-3β-ol (2), 24-methylcholesta-5, 24(28)-diene-3β-acetate (3), 4-methyl-24-methylcholesta-22-ene-3-ol (4), and cholesterol, was isolated and characterized from CH2Cl2/MeOH extract of Cespitularia stolonifera. A new acetate derivative of compound 1, termed 2S, 3R-4E, 8E-2-(heptadecanoylamino)-heptadeca-4, 8-diene-1, 3-diacetate (1a), was also prepared in the present study. All the structures were established on the basis of modern spectroscopic techniques, including FT-IR, 1D, 2D-NMR, HRESI-MS, and GC-MS, in addition of chemical methods. (-)-Alloaromadendren, ledane, (1)-alloaromadendren oxide, isoaromadendrene epoxide and (-)-caryophellen oxide were identified from the n-hexane fraction using GC-MS. The extract and the two ceramides (1) and (1a) exhibited significant cytotoxic activity against lung cancer A549 cells, while the extract and the two steroids (2) and (3) exhibited significant cytotoxic activity against breast cancer MCF-7 cells. The CH2Cl2/MeOH extract exhibited significant antiulcer activity in both ethanol and acetic acid induced ulcer models in rats, as evidenced by histopathological, histochemical, and biochemical examinations.
Collapse
Affiliation(s)
- Abdelsamed I Elshamy
- Natural Compounds Chemistry Department, National Research Centre, Giza 12622, Egypt.
| | - Walaa A El-Kashak
- Natural Compounds Chemistry Department, National Research Centre, Giza 12622, Egypt
| | - Heba M I Abdallah
- Pharmacology Department, National Research Centre, Giza 12622, Egypt
| | | | - Mahmoud I Nassar
- Natural Compounds Chemistry Department, National Research Centre, Giza 12622, Egypt
| |
Collapse
|
15
|
Motaung DE, Mhlongo GH, Nkosi SS, Malgas GF, Mwakikunga BW, Coetsee E, Swart HC, Abdallah HMI, Moyo T, Ray SS. Shape-selective dependence of room temperature ferromagnetism induced by hierarchical ZnO nanostructures. ACS Appl Mater Interfaces 2014; 6:8981-95. [PMID: 24896749 DOI: 10.1021/am501911y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We report on the room temperature ferromagnetism of various highly crystalline zinc oxide (ZnO) nanostructures, such as hexagonally shaped nanorods, nanocups, nanosamoosas, nanoplatelets, and hierarchical nano "flower-like" structures. These materials were synthesized in a shape-selective manner using simple microwave assisted hydrothermal synthesis. Thermogravimetric analyses demonstrated the as-synthesized ZnO nanostructures to be stable and of high purity. Structural analyses showed that the ZnO nanostructures are polycrystalline and wurtzite in structure, without any secondary phases. Combination of electron paramagnetic resonance, photoluminescence, and X-ray photoelectron spectroscopy studies revealed that the zinc vacancies (VZn) and singly ionized oxygen vacancies (VO(+)) located mainly on the ZnO surface are the primary defects in ZnO structures. A direct link between ferromagnetism and the relative occupancy of the VZn and VO(+) was established, suggesting that both VZn and VO(+) on the ZnO surface plays a vital role in modulating ferromagnetic behavior. An intense structure- and shape-dependent ferromagnetic signal with an effective g-value of >2.0 and a sextet hyperfine structure was shown. Moreover, a novel low field microwave absorption signal was observed and found to increase with an increase in microwave power and temperature.
Collapse
Affiliation(s)
- D E Motaung
- DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research , P.O. Box 395, Pretoria 0001, South Africa
| | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Abdallah HMI, Moyo T, Msomi JZ. Structural and Mössbauer studies of Mn0.5Co0.5Fe2O4ferrites prepared by high energy ball milling and glycolthermal methods. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/217/1/012141] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
17
|
El-Demerdash E, Salam OMA, El-Batran SA, Abdallah HMI, Shaffie NM. Inhibition of the renin-angiotensin system attenuates the development of liver fibrosis and oxidative stress in rats. Clin Exp Pharmacol Physiol 2007; 35:159-67. [PMID: 17900296 DOI: 10.1111/j.1440-1681.2007.04797.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1. The present study was designed to investigate the potential antifibrotic and anti-oxidant effects of lisinopril, fosinopril and losartan in an experimental rat model of liver injury using carbon tetrachloride (CCl(4)). 2. First, the potential hepatoprotective dose of each drug was screened against CCl(4)-induced acute hepatotoxicity. Then, we chose the minimum hepatoprotective dose of each drug to further investigate the mechanisms involved in the hepatoprotection using a chronic model of hepatotoxicity induced by CCl(4). 3. Liver function was assessed in addition to histopathological examination. Furthermore, oxidative stress markers (reduced glutathione (GSH) and lipid peroxides levels) and markers of fibrosis (hydroxyproline content and liver fibrosis area) were assessed. 4. It was found that treatment of animals with different drugs concomitantly with CCl(4) significantly counteracted the changes in liver function induced by CCl(4) (except fosinopril). In addition, the drugs ameliorated the histopathological changes induced by CCl(4). All drugs significantly counteracted lipid peroxidation and GSH depletion (except fosinopril) compared with the CCl(4)-intoxicated group. Moreover, the drugs studied significantly reduced liver hydroxyproline levels and the area of fibrosis compared with the CCl(4)-intoxicated group. 5. In conclusion, the present study provides evidence for the hepatoprotective effect of lisinopril, fosinopril and losartan. Both lisinopril and losartan was found to have better hepatoprotective potential than fosinopril against CCl(4)-induced hepatotoxicity. These hepatoprotective effects can be explained on the basis of anti-oxidant and antifibrotic mechanisms, mainly enhancement of GSH and reduction of lipid peroxidation and fibrosis.
Collapse
Affiliation(s)
- Ebtehal El-Demerdash
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.
| | | | | | | | | |
Collapse
|