1
|
Bakry SM, Aboul Naser AF, El Negoumy SIM, Kassem MES, Meselhy MR, Abdel-Sattar E. Comparative LC-MS/MS-based molecular networking, DNA fingerprinting, and in vitro anti-Helicobacter pylori activity of three Egyptian Ficus cultivars. J Pharm Biomed Anal 2023; 235:115620. [PMID: 37557066 DOI: 10.1016/j.jpba.2023.115620] [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: 04/28/2023] [Revised: 07/30/2023] [Accepted: 07/30/2023] [Indexed: 08/11/2023]
Abstract
Ficus species (Moraceae) have been used for nutrition and traditional medicine, and plants from this family are phytochemically abundant and serve as a potential source of natural products. As a result of the inherent complexity of the plant metabolomes and the fact that these Ficus species chemical space has not yet been fully decoded, it is still difficult to characterize their phytochemistry. Therefore, this study, we suggest the use of the molecular networking to elucidate the chemical classes existing in leaves of three Ficus species (F. deltoidei Jack, F. drupacea Thunb and F. sycomorus L.) and highlight the importance of molecular networking in examining their chemotaxonomy . By using computational tools, 90 metabolites were annotated , including phenolic acids, flavonoids, furanocoumarins, fatty acids and terpenoids. Phenolic acids were detected as the main class present in the three studied species. Flavonoids-C-glycosides, flavonoids-O-glycosides and isoflavonoids were mainly present in F. drupacea and F. sycomorus, while furanocoumarins were proposed in F. sycomorus. Vomifoliol-based sesquiterpenes were proposed in F. deltoidei. The chemotaxonomic differentiation agreed with the DNA fingerprinting using SCOT and ISSR markers. F. deltoidei, in particular, had a divergent chemical fingerprint as well as a different genotype. Chemotype differentiation using chemical fingerprints, in conjunction with the proposed genetic markers, creates an effective identification tool for the quality control of the raw materials and products derived from those three Ficus species. As well, F. drupacea exploited the most potent inhibition of H. pylori with MIC of 7.81 µg/ mL compared with clarithromycin. Overall, molecular networking provides a promising approach for the exploration of the chemical space of plant metabolomes and the elucidation of chemotaxonomy.
Collapse
Affiliation(s)
- Sherien M Bakry
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St., Dokki, 12622 Giza, Egypt
| | - Asmaa F Aboul Naser
- Therapeutic Chemistry Department, National Research Centre (NRC), 33 El Bohouth St., Dokki, 12622 Giza, Egypt
| | - Sabry I M El Negoumy
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St., Dokki, 12622 Giza, Egypt
| | - Mona E S Kassem
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St., Dokki, 12622 Giza, Egypt
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Essam Abdel-Sattar
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt.
| |
Collapse
|
2
|
Abdel-Sattar OE, Allam RM, Al-Abd AM, El-Halawany AM, EL-Desoky AM, Mohamed SO, Sweilam SH, Khalid M, Abdel-Sattar E, Meselhy MR. Hypophyllanthin and Phyllanthin from Phyllanthus niruri Synergize Doxorubicin Anticancer Properties against Resistant Breast Cancer Cells. ACS Omega 2023; 8:28563-28576. [PMID: 37576627 PMCID: PMC10413485 DOI: 10.1021/acsomega.3c02953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/21/2023] [Indexed: 08/15/2023]
Abstract
Doxorubicin (DOX) is a cornerstone chemotherapeutic agent for the treatment of several malignancies such as breast cancer; however, its activity is ameliorated by the development of a resistant phenotype. Phyllanthus species have been studied previously for their potential anticancer properties. The current work is aimed to study the potential cytotoxicity and chemomodulatory effects of hypophyllanthin (PN4) and phyllanthin (PN5) isolated from Phyllanthus niruri to DOX against the adriamycin multidrug-resistant breast cancer cells (MCF-7ADR) and elucidate their mechanism of action. The major compounds of the active methylene chloride fraction were isolated and assessed for their potential cytotoxicity and chemomodulatory effects on DOX against naïve (MCF-7) and resistant breast (MCF-7ADR) cancer cells. The mechanism of action of both compounds in terms of their impacts on programmed/non-programmed cell death (apoptosis and autophagy/necrosis), cell cycle progression/arrest, and tumor cell migration/invasion was investigated. Both compounds PN4 and PN5 showed a moderate but similar potency against MCF-7 as well as MCF-7ADR and significantly synergized DOX-induced anticancer properties against MCF-7ADR. The chemomodulatory effect of both compounds to DOX was found to be via potentiating DOX-induced cell cycle interference and apoptosis induction. It was found that PN4 and PN5 blocked the apoptosis-escape autophagy pathway in MCF-7ADR. On the molecular level, both compounds interfered with SIRT1 expression and consequently suppressed Akt phosphorylation, and PN5 blocked apoptosis escape. Furthermore, PN4 and PN5 showed promising antimigratory and anti-invasive effects against MCF-7ADR, as confirmed by suppression of N-cadherin/β-catenin expression. In conclusion, for the first time, hypophyllanthin and phyllanthin isolated from P. niruri showed promising chemomodulatory effects to the DOX-induced chemotherapeutic activity against MCF-7ADR. Both compounds significantly synergized DOX-induced anticancer properties against MCF-7ADR. This enhanced activity was explained by further promoting DOX-induced apoptosis and suppressing the apoptosis-escape autophagy feature of the resistant breast cancer cells. Both compounds (hypophyllanthin and phyllanthin) interfered with the SIRT1/Akt pathway and suppressed the N-cadherin/β-catenin axis, confirming the observed antiproliferative, cytotoxic, and anti-invasive effects of hypophyllanthin and phyllanthin.
Collapse
Affiliation(s)
- Ola E. Abdel-Sattar
- Pharmacognosy Department,
Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo 11562, Egypt
| | - Rasha M. Allam
- Pharmacology
Department, Medical Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Ahmed M. Al-Abd
- Pharmacology
Department, Medical Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Ali M. El-Halawany
- Pharmacognosy Department,
Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo 11562, Egypt
| | - Ahmed M. EL-Desoky
- Department of Molecular Biology,
Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat City (USC), Sadat City 32958, Egypt
| | - Shanaz O. Mohamed
- School of Pharmaceutical
Sciences, Universiti Sains Malaysia, Gelugor, Penang 11700, Malaysia
| | - Sherouk Hussein Sweilam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
- Department of Pharmacognosy, Faculty of
Pharmacy, Egyptian Russian University, Cairo-Suez Road, Badr City, Cairo 11829, Egypt
| | - Mohammad Khalid
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Essam Abdel-Sattar
- Pharmacognosy Department,
Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo 11562, Egypt
| | - Meselhy R. Meselhy
- Pharmacognosy Department,
Faculty of Pharmacy, Cairo University, Kasr El Aini St., Cairo 11562, Egypt
| |
Collapse
|
3
|
Bakry SM, Naser AFA, Negoumy SIE, Kassem MES, Abdel-Sattar E, Meselhy MR. Phenolic acids-rich fraction from Ficus drupacea leaves for the prevention and treatment of ethanol-induced gastric mucosal injury in rats. Inflammopharmacology 2023; 31:1423-1436. [PMID: 36840885 DOI: 10.1007/s10787-023-01158-4] [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: 11/13/2022] [Accepted: 02/06/2023] [Indexed: 02/26/2023]
Abstract
Bioactivity-guided fractionation of F. drupacea Thunb. extract revealed that the water fraction (FDWF) increased pH of the artificial gastric juice from 1.2 to 5.67 ± 0.015. The gastroprotective effect of FDWF against ulcer induced by ethanol was evaluated in rats. In ulcerogenic rats, increase in the gastric juice volume and ulcer lesions, and decrease in the gastric pH were evident. However, pretreatment with FDWF (100 mg/kg b.wt., p.o.) significantly inhibited lesion index, reduced gastric juice volume by 56.09% and increased gastric pH value. When given after ethanol, the same dose of FDWF led to significant healing of the gastric ulcer, with 75.60% reduction of gastric juice volume, and increase in pH value. In both prophylactic and therapeutic-treated groups, the level of superoxide dismutase and reduced glutathione in gastric homogenate were increased, while that of malondialdehyde was decreased. Also, the levels of succinate dehydrogenase and lactate dehydrogenase were increased, while that of acid phosphatase was decreased. In addition, the inflammatory markers; IL-10 and PGE2 were significantly increased. The histopathological results confirmed the above findings and indicated that the antiulcer effect of FDWF is mediated, at least in part, through antioxidant and anti-inflammatory mechanisms. Twenty-three compounds were tentatively identified in FDWF using UPLC-PDA-ESI-MS/MS and most of them were found to be phenolic acid derivatives. FDWF was standardized to contain 23.66 ± 2.62 mg/g and 8.86 ± 0.29 mg/g of quinic acid and chlorogenic acid, respectively. Accordingly, FDWF is a potential natural product that could increase the healing of gastric mucosal injury and prevents the development of ethanol-induced gastric mucosal injury in rats.
Collapse
Affiliation(s)
- Sherien M Bakry
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St. Dokki, Giza, 12622, Egypt
| | - Asmaa F Aboul Naser
- Therapeutic Chemistry Department, National Research Centre (NRC), 33 El Bohouth St. Dokki, Giza, 12622, Egypt
| | - Sabri I El Negoumy
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St. Dokki, Giza, 12622, Egypt
| | - Mona E S Kassem
- Phytochemistry and Plant Systematics Department, National Research Centre (NRC), 33 El Bohouth St. Dokki, Giza, 12622, Egypt
| | - Essam Abdel-Sattar
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt.
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
| |
Collapse
|
4
|
Eloutify Y, El-Shiekh RA, Ibrahim KM, Elshimy R, Avula B, Katragunta K, Khan IA, Meselhy MR. Bioassay-Guided Isolation of Antimicrobial Components and LC/QToF Profile of Plumeria obtusa: Potential for the Treatment of Antimicrobial Resistance. ACS Omega 2023; 8:6476-6491. [PMID: 36844537 PMCID: PMC9947952 DOI: 10.1021/acsomega.2c06803] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/23/2023] [Indexed: 05/31/2023]
Abstract
The methanolic fraction (M-F) of the total extract (TE) of Plumeria obtusa L. aerial parts showed promising antibacterial effects against the MDR (multidrug-resistant) gram-negative pathogens Klebsiella pneumoniae and Escherichia coli O157:H7 [Shiga toxin-producing E. coli (STEC)]. In addition, M-F had a synergistic effect (in combination with vancomycin) against the MDR gram-positive strains MRSA (methicillin-resistant Staphylococcus aureus) and Bacillus cereus. After treating the K. pneumoniae- and STEC-infected mice with M-F (25 mg/kg, i.p.), the level of IgM and TNF-α was decreased and the severity of pathological lesions were reduced better than that observed after administration of gentamycin (33 mg/kg, i.p.). Thirty-seven compounds including 10 plumeria-type iridoids and 18 phenolics, 7 quinoline derivatives, 1 amino acid, and 1 fatty acid were identified in TE using LC/ESI-QToF. Furthermore, five compounds; kaempferol 3-O-rutinoside (M1), quercetin 3-O-rutinoside (M2), glochiflavanoside B (M3), plumieride (M4), and 13-O-caffeoylplumieride (M5) were isolated from M-F. M5 was active against K. pneumoniae (MIC of 64 μg/mL) and STEC (MIC of 32 μg/mL). These findings suggested that M-F and M5 are promising antimicrobial natural products for combating MDR K. pneumoniae and STEC nosocomial infections.
Collapse
Affiliation(s)
- Yousra
Tarek Eloutify
- Department
of Pharmacognosy, Faculty of Pharmacy, Cairo
University, Kasr el Aini St, Cairo 11562, Egypt
| | - Riham A. El-Shiekh
- Department
of Pharmacognosy, Faculty of Pharmacy, Cairo
University, Kasr el Aini St, Cairo 11562, Egypt
| | - Khaled Meselhy Ibrahim
- Department
of Pharmacognosy, Faculty of Pharmacy, Cairo
University, Kasr el Aini St, Cairo 11562, Egypt
| | - Rana Elshimy
- Department
of Microbiology and Immunology, Faculty of Pharmacy, Ahram Canadian University, Giza 3221405, Egypt
- Department
of Microbiology
and Immunology, Egyptian Drug Authority, Cairo 11553, Egypt
| | - Bharathi Avula
- National
Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
| | - Kumar Katragunta
- National
Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
| | - Ikhlas A. Khan
- National
Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
- Division
of Pharmacognosy, Department of Biomolecular Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
| | - Meselhy R. Meselhy
- Department
of Pharmacognosy, Faculty of Pharmacy, Cairo
University, Kasr el Aini St, Cairo 11562, Egypt
| |
Collapse
|
5
|
Eloutify YT, El-Shiekh RA, Ibrahim KM, Hamed AR, Al-Karmalawy AA, Shokry AA, Ahmed YH, Avula B, Katragunta K, Khan IA, Meselhy MR. Bioactive fraction from Plumeria obtusa L. attenuates LPS-induced acute lung injury in mice and inflammation in RAW 264.7 macrophages: LC/QToF-MS and molecular docking. Inflammopharmacology 2023; 31:859-875. [PMID: 36773191 PMCID: PMC10140140 DOI: 10.1007/s10787-023-01144-w] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/26/2022] [Indexed: 02/12/2023]
Abstract
In this study, the anti-inflammatory effects of the methanolic extract (TE) of Plumeria obtusa L. (aerial parts) and its fractions were evaluated in vitro, and active fraction was evaluated in vivo. Among tested extracts, dichloromethane fraction (DCM-F) exhibited the strongest inhibition of lipopolysaccharide (LPS)-induced nitric oxide (NO) in RAW 264.7 macrophages. The effect of DCM-F on LPS-induced acute lung injury (ALI) in mice was studied. The animals were divided into five groups (n = 7) randomly; Gp I: negative control, GP II: positive control (LPS group), GP III: standard (dexamethasone, 2 mg/kg b.wt), GP IV and V: DCM-F (100 mg/kg), and DEM-F (200 mg/kg), respectively. DCM-F at a dose of 200 mg/kg suppressed the ability of LPS to increase the levels of nitric oxide synthase (iNOS), NO, tumor necrosis factor-α (TNF-α), and interleukin 6 (IL-6), as measured by ELISA. In addition, the expression of cyclooxygenase-2 (COX-2) was reduced (determined by immunohistochemistry) and the level of malondialdehyde (MDA) was decreased while that of catalase was restored to the normal values. Furthermore, the histopathological scores of inflammation induced by LPS were reduced. Twenty-two compounds were tentatively identified in DCM-F using LC/ESI-QToF with iridoids, phenolic derivatives and flavonoids as major constituents. Identified compounds were subjected to two different molecular docking processes against iNOS and prostaglandin E synthase-1 target receptors. Notably, protoplumericin A and 13-O-coumaroyl plumeride were the most promising members compared to the co-crystallized inhibitor in each case. These findings suggested that DCM-F attenuates the LPS-induced ALI in experimental animals through its anti-inflammatory and antioxidant potential.
Collapse
Affiliation(s)
- Yousra T Eloutify
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo, 11562, Egypt
| | - Riham A El-Shiekh
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo, 11562, Egypt
| | - Khaled Meselhy Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo, 11562, Egypt
| | - Ahmed R Hamed
- Chemistry of Medicinal Plants Department and Biology Unit, Central Lab for the Pharmaceutical and Drug Industries Research Institute, National Research Centre, 33 El-Bohouth St, Giza, 12622, Dokki, Egypt
| | - Ahmed A Al-Karmalawy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, 6th of October City, Giza, 12566, Egypt
| | - Aya A Shokry
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
| | - Yasmine H Ahmed
- Cytology and Histology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Bharathi Avula
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA
| | - Kumar Katragunta
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA
| | - Ikhlas A Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.,Division of Pharmacognosy, Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS, 38677, USA
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo, 11562, Egypt.
| |
Collapse
|
6
|
Ali DE, Gedaily RAE, Ezzat SM, Sawy MAE, Meselhy MR, Abdel-Sattar E. In silico and in vitro anti-inflammatory study of phenolic compounds isolated from Eucalyptus maculata resin. Sci Rep 2023; 13:2093. [PMID: 36747067 PMCID: PMC9902548 DOI: 10.1038/s41598-023-28221-y] [Citation(s) in RCA: 3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 01/16/2023] [Indexed: 02/08/2023] Open
Abstract
Plant resins are rich in bioactive compounds with high medicinal values. However, the chemistry and anti-inflammatory activity of the resins produced by trees of the genus Eucalyptus were scarcely investigated. The inflammatory targets cyclooxygenase-1 (COX-1), COX-2, TNF-, NF-B, and NO were significantly inhibited by the methanolic extract of Eucalyptus maculata kino resin (EME) and its CH2Cl2 soluble fraction (MCF). Sakuranetin (C1), (E)-cinnamic acid (C2), kaempferol 7- methyl ether (C3), 7-O-methyl aromadendrin (C4), and 1,6- dicinnamoyl-O-α-D-glucopyranoside (C5) were isolated from MCF. Three compounds (C1, C2, and C4) showed potent in vitro COX-1 inhibition, while C5 inhibited COX-2, TNF-α, NF-κB, and NO significantly. An in-silico study revealed that C5 had the highest binding affinity to the active site in COX-2 with binding energy score (S) of -14.85 kcal/mol, better than celecoxib (COX-2 inhibitor). In conclusion, 1,6-dicinnamoyl-O-α-D-glucopyranoside (C5) could be investigated further in the search for anti-inflammatory agents.
Collapse
Affiliation(s)
- Dalia E Ali
- Department of Pharmacognosy, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt
| | - Rania A El Gedaily
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El-Kasr El-Aini St, Cairo, 11562, Egypt
| | - Shahira M Ezzat
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El-Kasr El-Aini St, Cairo, 11562, Egypt.,Department of Pharmacognosy, Faculty of Pharmacy, October University for Modern Science and Arts (MSA), 6th October, 12451, Egypt
| | - Maged A El Sawy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Pharos University in Alexandria, Alexandria, Egypt
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El-Kasr El-Aini St, Cairo, 11562, Egypt
| | - Essam Abdel-Sattar
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, El-Kasr El-Aini St, Cairo, 11562, Egypt.
| |
Collapse
|
7
|
Sabra RT, Abdellatef AA, Abdel-Sattar E, Fathy M, Meselhy MR, Hayakawa Y. Russelioside A, a Pregnane Glycoside from Caralluma tuberculate, Inhibits Cell-Intrinsic NF-κB Activity and Metastatic Ability of Breast Cancer Cells. Biol Pharm Bull 2022; 45:1564-1571. [PMID: 36184517 DOI: 10.1248/bpb.b22-00508] [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] [Indexed: 11/22/2022]
Abstract
Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) is a potential target for inflammatory-breast cancer treatment as it participates in its pathogenesis, such as tumor initiation, progression, survival, metastasis, and recurrence. In this study, we aimed to discover a novel anti-cancer treatment from natural products by targeting NF-κB activity. Using the 4T1-NFκB-luciferase reporter cell line, we tested three pregnane glycosides extracted from the herb Caralluma tuberculata and discovered that Russelioside A markedly suppressed NF-κB activity in breast cancer. Russelioside A inhibited NF-κB (p65) transcriptional activity and its phosphorylation. Following NF-κB inhibition, Russelioside A exerted anti-proliferative and anti-metastatic effects in breast cancer cells in vitro. Moreover, it inhibited the NF-κB constitutive expression of downstream pathways, such as VEGF-b, MMP-9, and IL-6 in 4T1 cells. In addition, it reduced the metastatic capacity in a 4T1 breast cancer model in vivo. Collectively, our conclusions reveal that Russelioside A is an attractive natural compound for treating triple-negative breast cancer growth and metastasis through regulating NF-κB activation.
Collapse
Affiliation(s)
- Rahma Tharwat Sabra
- Institute of Natural Medicine, University of Toyama.,Biochemistry Department, Faculty of Pharmacy, Minia University
| | | | | | - Moustafa Fathy
- Biochemistry Department, Faculty of Pharmacy, Minia University
| | | | | |
Collapse
|
8
|
Abdel-Sattar EA, Al-Hawshabi OS, Shalabi AA, El Halawany AM, Meselhy MR. Arabincosides A-D, pregnane glycosides isolated from Caralluma arabica. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
9
|
Farag DBE, Yousry C, Al-Mahallawi AM, El-Askary HI, Meselhy MR, AbuBakr N. The efficacy of Origanum majorana nanocubosomal systems in ameliorating submandibular salivary gland alterations in streptozotocin-induced diabetic rats. Drug Deliv 2021; 29:62-74. [PMID: 34964423 PMCID: PMC8725878 DOI: 10.1080/10717544.2021.2018522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Indexed: 11/16/2022] Open
Abstract
Diabetes mellitus is a challenging health problem. Salivary gland dysfunction is one of its complications. Current treatments possess numerous adverse effects. Therefore, herbal extracts have emerged as a promising approach for safe and effective treatment. However, they are required in large doses to achieve the desired effect. Accordingly, Origanum majorana extract (OE) was incorporated into nano-sized systems to enhance its biological effects at lower dosages. OE was standardized against rosmarinic acid (RA) and then loaded into nano-cubosomal (NC) systems via a 23 full-factorial design. Two optimum nano-systems at different drug loads (2.08 or 1.04 mg-RA/mL) were selected and assessed in vivo to compare their effects in streptozotocin-induced diabetic rats against conventional OE (2.08 mg-RA/mL). Blood glucose was evaluated weekly. Submandibular salivary glands were processed for histopathological examination and nuclear factor-erythroid 2-related factor 2 (Nrf2), Kelch-like ECH-associated protein 1 (Keap1), and p38-MAPK gene expression analysis. NC systems were successfully prepared and optimized where the optimum systems showed nano-sized vesicles (210.4–368.3 nm) and high zeta potential values. In vivo results showed a significant lower blood glucose in all treated groups, with an exceptional reduction with NC formulations. Marked histopathological improvement was observed in all OE-treated groups, with OE-NC4 (2.08 mg-RA/mL) demonstrating the best features. This was supported by RT-PCR; where the OE-NC4 group recorded the highest mean value of Nrf2 and the least mean values of Keap1 and p38-MAPK, followed by OE-NC3 and OE groups. In conclusion, OE-loaded NC enhanced the anti-hyperglycemic effect of OE and ameliorated diabetic gland alterations compared to conventional OE. Thus, cubosomal nano-systems could be anticipated as potential carriers for the best outcome with OE.
Collapse
Affiliation(s)
- Dina B E Farag
- Department of Oral Biology, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Carol Yousry
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Abdulaziz Mohsen Al-Mahallawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.,School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo, Egypt
| | - Hesham I El-Askary
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Nermeen AbuBakr
- Department of Oral Biology, Faculty of Dentistry, Cairo University, Cairo, Egypt
| |
Collapse
|
10
|
Kohyama A, Kim MJ, Yokoyama R, Sun S, Omar AM, Phan ND, Meselhy MR, Tsuge K, Awale S, Matsuya Y. Structure-activity relationship and mechanistic study on guggulsterone derivatives; Discovery of new anti-pancreatic cancer candidate. Bioorg Med Chem 2021; 54:116563. [PMID: 34942553 DOI: 10.1016/j.bmc.2021.116563] [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: 11/08/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 12/24/2022]
Abstract
Pancreatic cancer is one of the deadliest types of malignancies. A new intervention aiming to combat pancreatic cancer is targeting its extra-ordinary ability to tolerate nutrition starvation, a phenomenon known as "Austerity". As a part of a research program aiming to develop a new-generation of anticancer agents, known as "anti-austerity agents", guggulsterone derivatives (GSDs) were identified as unique anti-austerity agents in terms of potency and selectivity. These agents are able to exert preferential cytotoxic activity only under nutrient-deprived conditions with little or no toxicity under normal conditions. In the present study, a library of 14 GSDs was synthesized and screened against PANC-1 human pancreatic cells. Among tested compounds, GSD-11 showed the most potent activity with PC50 a value of 0.72 μM. It also inhibited pancreatic cancer cell migration and colony formation in a concentration-dependent manner. A mechanistic study revealed that this compound can inhibit the activation of the Akt/mTOR signaling pathway. Therefore, GSD-11 could be a promising lead compound for the anticancer drug discovery against pancreatic cancer.
Collapse
Affiliation(s)
- Aki Kohyama
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Min Jo Kim
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Rei Yokoyama
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Sijia Sun
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ashraf M Omar
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nguyen Duy Phan
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Kiyoshi Tsuge
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Suresh Awale
- Natural Drug Discovery Laboratory, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Yuji Matsuya
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| |
Collapse
|
11
|
Abdel-Rahman RF, El-Desoky A, Handoussa H, Meselhy MR, Asaad GF, El-Mekkawy S. LC-MS-based chemical profiling and in-vivo evaluation of the anti-inflammatory and anti-nociceptive activities of the defatted methanolic extract of Crataegus sinaica (Rosaceae) fruits. Egypt J Chem 2021. [DOI: 10.21608/ejchem.2021.94061.4429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
12
|
El-Mekkawy S, Hassan AZ, Abdelhafez MA, Mahmoud K, Mahrous KF, Meselhy MR, Sendker J, Abdel-Sattar E. Cytotoxicity, genotoxicity, and gene expression changes induced by methanolic extract of Moringa stenopetala leaf with LC-qTOF-MS metabolic profile. Toxicon 2021; 203:40-50. [PMID: 34610271 DOI: 10.1016/j.toxicon.2021.09.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 08/07/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 12/25/2022]
Abstract
Moringa stenopetala (Baker f.) Cuf.and other Moringa species have traditionally been used to treat various diseases. The purpose of this study was to determine the cytotoxic and genotoxic effects of the methanolic extract of M. stenopetala leaf and its fractions on selected tumor cells. Cytotoxicity was determined by MTT assay. The comet assay was used toassess DNA damage, and gel electrophoresis was used to determine DNA fragmentation. Gene expression was analyzed by qPCR using two specific genes for each cancer cell line. Fractionation of the methanolic extract (E-1) on Diaion HP-20 yielded five fractions (Fr-2 to Fr-6); only Fr-4 and Fr-6 were cytotoxic to breast cancer cells (MCF-7; IC50 = 58.3 ± 0.93 and 35.8 ± 2.44 μg/mL, respectively), human hepatocellular carcinoma cells (HepG2; IC50 = 57.8 ± 1.57 and 39.3 ± 1.90 μg/mL, respectively), and Fr-4 was cytotoxic to human colon cancer cells (HCT-116; IC50 = 94.2 ± 4.9 μg/mL). In addition, exposure of the cancer cells to Fr-4 and Fr-6 resulted in a high level of DNA damage. Moreover, relative expression of MTAP and CDKN2A in MCF-7 were increased, whereas expression of p21 and p53 in HCT-116, and APC and TERT in HepG2 were decreased, similar to that of doxorubicin. LC-qTOF-MS was used to identify metabolites in E-1, the majority of which were enriched in Fr-4. Two terpenes (loliolide and dihydroactinidiolide), the majority of the flavonoids, and niazirin were about two fold enriched in Fr-4, whereas the majority of the lipids were 4-10 fold enriched. However, Fr-6 hardly showed compounds other than the two terpenes that were enriched 1.5 and 7 fold. The findings suggest that Fr-4 and Fr-6 are promising sources of compounds possessing cytotoxic and genotoxic properties.
Collapse
Affiliation(s)
- Sahar El-Mekkawy
- Department of Chemistry of Natural Compounds, National Research Centre, Giza, 12622, Egypt
| | - Amal Z Hassan
- Department of Chemistry of Natural Compounds, National Research Centre, Giza, 12622, Egypt
| | | | - Khaled Mahmoud
- Pharmacognosy Department, National Research Centre, Giza, 12622, Egypt
| | - Karima F Mahrous
- Cell Biology Department, National Research Centre, Giza, 12622, Egypt
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
| | - Jandirk Sendker
- Institute of Pharmaceutical Biology and Phytochemistry,University of Münster, Münster, Germany
| | - Essam Abdel-Sattar
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.
| |
Collapse
|
13
|
Abdellatef AA, Zhou Y, Yamada A, Elmekkawy SA, Kohyama A, Yokoyama S, Meselhy MR, Matsuya Y, Sakurai H, Hayakawa Y. Synthetic E-guggulsterone derivative GSD-1 inhibits NF-κB signaling and suppresses the metastatic potential of breast cancer cells. Biomed Pharmacother 2021; 140:111737. [PMID: 34020249 DOI: 10.1016/j.biopha.2021.111737] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022] Open
Abstract
Guggulsterone (GS) [4,17(20)-pregnadiene-3,16-dione], is the main active phytosterol constituent in guggul, the gum resin of Commiphora wightii (Arnott.) Bhand./Commiphora mukul Engl. tree, and is known for its medicinal effects. In this study, we report that GSD-1, a structurally-related synthetic GS derivative, strongly inhibits NF-κB activation induced by TNF-α. GSD-1 prevented the nuclear translocation of p65 through the blockade of IκBα degradation and p65 phosphorylation, and further inhibited the activation of upstream kinases, including transforming growth factor-β activated kinase 1 (TAK1), IκB kinase (IKK) α, and IKKβ. Furthermore, GSD-1 inhibited the cell-intrinsic activation of NF-κB, and exerted its direct anti-cancer and anti-metastatic effects in both murine and human breast cancer cell lines. This study demonstrated GSD-1 to be an attractive compound to target NF-κB activation that has potential for treating breast cancer growth and metastasis.
Collapse
Affiliation(s)
- Amira A Abdellatef
- Section of Host Defences, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Yue Zhou
- Department of Cancer Cell Biology, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Akane Yamada
- Department of Cancer Cell Biology, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Sahar A Elmekkawy
- Department of Chemistry of Natural Compounds, National Research Centre, Egypt
| | - Aki Kohyama
- Department of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Satoru Yokoyama
- Department of Cancer Cell Biology, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Yuji Matsuya
- Department of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Hiroaki Sakurai
- Department of Cancer Cell Biology, Faculty of Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Yoshihiro Hayakawa
- Section of Host Defences, Institute of Natural Medicine, University of Toyama, Toyama, Japan.
| |
Collapse
|
14
|
Rasheed DM, Emad AM, Ali SF, Ali SS, Farag MA, Meselhy MR, Sattar EA. UPLC-PDA-ESI/MS metabolic profiling of dill shoots bioactive fraction; evidence of its antioxidant and hepatoprotective effects in vitro and in vivo. J Food Biochem 2021; 45:e13741. [PMID: 33904177 DOI: 10.1111/jfbc.13741] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 01/16/2023]
Abstract
Hydroxyl radical (• OH) scavenging capacity of aqueous dill (Anethum graveolens L.) shoot (ADSh) extract was assessed using electron paramagnetic resonance (EPR) spectroscopy. ADSh extract (at concentrations of 0.5 and 10 mg/ml) exerted high (OH) radical scavenging power. ADSh extract was further fractionated on Diaion HP-20 column to yield five fractions. EPR spin-trapping assay revealed fraction 4 (eluted with 75% aq. MeOH) to possess (• OH) radical scavenging capacity over a concentration range (0.01-10 mg/ml), whereas fraction 2 (eluted with 25% aq. MeOH) appeared to be pro-oxidant at concentration 0.01 mg/ml. UPLC-PDA-ESI-MS metabolite profiling of ADSh extract revealed 87 metabolites, of which 64 compounds were identified in fraction 4, the most active fraction. Furthermore, ADSh extract demonstrated a hepatoprotective effect against acetaminophen (APAP)-induced hepatotoxicity in rats. Pretreatment of rats with ADSh extract (200 mg/kg b.wt) markedly attenuated the increased in the serum hepatic enzyme levels. It also increased free glutathione level and total antioxidant capacity in the serum of treated rats. [Correction added on May 3, 2021, after first online publication: "rates" has been changed to "rats" in the previous sentence.] Additionally, levels of (TNF-α and IL-1β) were back to almost normal levels compared to the control group. The above findings suggest that ADSh extract has a protective effect against APAP-induced liver damage.
Collapse
Affiliation(s)
- Dalia M Rasheed
- Pharmacognosy Department, Faculty of Pharmacy, October 6 University, Sixth of October, Egypt
| | - Ayat M Emad
- Pharmacognosy Department, Faculty of Pharmacy, October 6 University, Sixth of October, Egypt
| | - Sherifa F Ali
- Pharmacognosy Department, Faculty of Pharmacy, October 6 University, Sixth of October, Egypt.,Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Sameh S Ali
- Children's Cancer Hospital Egypt 57357, Cairo, Egypt.,Center for Aging and Associated Disease, Zewail City of Science and Technology, Sixth of October, Egypt
| | - Mohamed A Farag
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.,Department of Chemistry, School of Sciences & Engineering, The American University in Cairo, New Cairo, Egypt
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Essam A Sattar
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| |
Collapse
|
15
|
Madi YF, Choucry MA, El-Marasy SA, Meselhy MR, El-Kashoury ESA. UPLC-Orbitrap HRMS metabolic profiling of Cymbopogon citratus cultivated in Egypt; neuroprotective effect against AlCl 3-induced neurotoxicity in rats. J Ethnopharmacol 2020; 259:112930. [PMID: 32376365 DOI: 10.1016/j.jep.2020.112930] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 07/21/2019] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cymbopogon citratus (lemongrass) is commonly used in teas, soups and treat inflammatory-based ailments, vascular and nervous disorders. AIM OF THE STUDY The study aimed to evaluate the neuroprotective effect of Cymbopogon citratus leaves through scientific protocol. The effect of aqueous (AE) and ethanolic (EE) extracts was evaluated against AlCl3-induced Alzheimer's disease (AD) in rats. Metabolic profiling of the plant, isolation of bioactive compounds and standardization of the active fraction were investigated. MATERIALS AND METHODS AE of Cymbopogon citratus leaves was prepared as per traditional method (infusion), EE was prepared by repeated maceration in 90% ethanol, bioactive fraction (BAEE) was obtained from EE and the active compounds thereof were obtained by column chromatography. Metabolic profiling of Cymbopogon citratus was performed by UPLC-Orbitrap HRMS and HPLC was used for standardization. AlCl3-induced Alzheimer's rats were used to assess neuroprotective effect of the extracts. Neuroprotective mechanism(s) of Cymbopogon citratus extracts was clarified through histopathological examination of brain tissues, estimation of AD biochemical markers, oxidative stress and neuroinflammation in brain homogenates. In addition, antioxidant (using DPPH assay) and anticholinesterase (using modified Ellman's method) activities were investigated. RESULTS AlCl3-treated rats (17 mg/kg/day) showed histopathological alteration in brain tissues together with elevated levels of Aβ, tau proteins, MDA, NF-kB and IL-6. However, treatment with AE and EE of Cymbopogon citratus leaves prevented the pathological changes and maintained the levels of oxidative stress and inflammatory markers. In addition, BAEE significantly inhibited acetylcholinesterase enzyme (2.11 ± 0.11 mg/ml) and exhibited a strong antioxidant activity (24.99 ± 0.00 μg/ml). UPLC-MS of Cymbopogon citratus leaves showed peaks for twenty-eight compounds, twenty-one of them were identified. Three flavonoids; isoorientin, isoschaftoside and luteolin-7-O-neohesperidoside were isolated from BAEE as major constituents. The powdered leaves of Cymbopogon citratus was found to contain remarkable amounts of caffeic acid (3.49 mg/g dry wt.) and isoorientin (7.37 mg/g dry wt.) as determined by HPLC. CONCLUSION Cymbopogon citratus ethanolic extract attenuates AlCl3-induced neurotoxicity in rats through inhibition of oxidative stress and inflammatory markers. This effect could possibly attributed, in part to its high content of phenolic acids and flavonoids. Accordingly, we recommend Cymbopogon citratus leaves for protection against AD.
Collapse
Affiliation(s)
- Yasmine F Madi
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.
| | - Mouchira A Choucry
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt; Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy, Heliopolis University, Cairo, 11361, Egypt.
| | - Salma A El-Marasy
- Pharmacology Department, National Research Centre, Giza, 12622, Egypt.
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.
| | | |
Collapse
|
16
|
Emad AM, Ali SF, Abdel-Rahman EA, Meselhy MR, Farag MA, Ali SS, Abdel-Sattar EA. Anti-inflammatory and antioxidant effects of Apium graveolens L. extracts mitigate against fatal acetaminophen-induced acute liver toxicity. J Food Biochem 2020; 44:e13399. [PMID: 32713084 DOI: 10.1111/jfbc.13399] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 12/15/2022]
Abstract
In the present work, antioxidant activity, total phenolics (TP), and total flavonoids (TF) contents of aqueous and methanol extracts of celery were determined, in addition to untargeted metabolites profiling its methanol celery root extract (MCRE) via UPLC-MS. Although MCRE exhibited the lowest TPC and TFC levels, it presented the most potential hydroxyl radical quenching effect using electron paramagnetic resonance spin trapping technique. Treatment of Acetaminophen-induced hepatotoxicity (AAH) rats with MCRE lowered serum levels of AST, ALT, ALP, TNF-α, and IL-1β significantly. Additionally, MCRE significantly increased total antioxidant capacity (TAC) and glutathione (GSH) levels relative to AAH rats. Strikingly, Kaplan-Meier survival analysis of all groups revealed a 100% prevention of acetaminophen-induced mortality of rats by MCRE pretreatment (100 mg/kg/day). MCRE prevented AAH-associated severe weight loss and elicited normal behavior in the rescued rats. Our results suggest that pretreatment with MCRE can mitigate against overdosed acetaminophen-induced acute liver failure and warrant further investigations on the potential of postinjury intervention. PRACTICAL APPLICATIONS: Acetaminophen-induced hepatotoxicity (AAH) accounts for alerting numbers of overdose-related acute liver failure and liver transplant cases with increased morbidity and mortality rates. Currently proposed mechanisms implicate mitochondria-mediated oxidative stress and inflammation in the pathogenesis of AAH, which underline current interventions employing antioxidants to combat liver damage by over-dosed acetaminophen. The present work uncovers potent protective effects of some celery extracts (and their fractions) against acetaminophen-induced oxidative stress and inflammation. Treatment of rats with fatal liver injury with methanol extract of celery root significantly reduced secretion of liver enzymes and markedly decreased inflammatory as well as oxidative stress markers in these animals. This, in turn, rescued challenged rats exposed to fatal doses of acetaminophen completely, which establishes methanol extracts of celery roots as effective therapeutic intervention against AAH. The antioxidant capacity of the extracts was determined using EPR technique, and the secondary metabolites related to antioxidant activity were characterized via UPLC-MS.
Collapse
Affiliation(s)
- Ayat M Emad
- Pharmacognosy Department, Faculty of Pharmacy, October 6 University, Sixth of October, Egypt
| | - Sherifa F Ali
- Pharmacognosy Department, Faculty of Pharmacy, October 6 University, Sixth of October, Egypt
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Engy A Abdel-Rahman
- Children's Cancer Hospital Egypt 57357, Cairo, Egypt
- Department of Pharmacology, Faculty of Medicine, Assuit University, Assuit, Egypt
| | - Meselhy R Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mohamed A Farag
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
- Department of Chemistry, School of Sciences & Engineering, The American University in Cairo, New Cairo, Egypt
| | - Sameh S Ali
- Children's Cancer Hospital Egypt 57357, Cairo, Egypt
- Center for Aging and Associated Disease, Zewail City of Science and Technology, Sixth of October, Egypt
| | | |
Collapse
|
17
|
Madi YF, Choucry MA, Meselhy MR, El-Kashoury ESA. Essential oil ofCymbopogon citratuscultivated in Egypt: seasonal variation in chemical composition and anticholinesterase activity. Nat Prod Res 2020; 35:4063-4067. [DOI: 10.1080/14786419.2020.1713125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yasmine F. Madi
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mouchira A. Choucry
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
- Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy, Heliopolis University, Cairo, Egypt
| | - Meselhy R. Meselhy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | | |
Collapse
|
18
|
Emad AM, Ali SF, Meselhy MR, Sattar EA. Comparative Antioxidant Activities of Selected Apiaceous Plants Using EPR Technique. ACTA ACUST UNITED AC 2019. [DOI: 10.5530/pj.2019.11.210] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Khayyal MT, El-Baz FK, Meselhy MR, Ali GH, El-Hazek RM. Intestinal injury can be effectively prevented by Dunaliella salina in gamma irradiated rats. Heliyon 2019; 5:e01814. [PMID: 31193849 PMCID: PMC6543095 DOI: 10.1016/j.heliyon.2019.e01814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 01/25/2019] [Revised: 04/03/2019] [Accepted: 05/22/2019] [Indexed: 02/07/2023] Open
Abstract
Dunaliella salina (D. salina) is one of the most common microalgae that is used as human food. It is isolated from the salty lakes in El-Fayoum and Lake of Bardawil-Sinai in Egypt and can withstand very high concentrations of salt: The potentiality of D. salina, a unicellular biflagellate green alga to protect against intestinal injury induced after radiation exposure was studied. D. salina was given orally in doses of 100 and 200 mg/kg to male Wistar rats for 5 days before exposure to 6 Gray (Gy) gamma radiation and continued for a further two days. Rats were sacrificed 24 h later and intestinal segments were dissected out. One segment was examined histologically and another was used to prepare homogenates to assess relevant biochemical parameters reflecting intestinal injury. Radiation exposure led to a rise in the histological damage score, an increase in tissue tumor necrosis factor (TNF-α), interleukin (IL-1β) and thiobarbituric acid reactive substances (TBARS) but a reduction in tissue reduced glutathione (GSH) and in serum citrulline. Pretreatment with either dose of D. salina effectively reduced the severity of intestinal mucositis induced by gamma radiation.
Collapse
Affiliation(s)
- Mohamed T Khayyal
- Department of Pharmacology, Faculty of Pharmacy, Cairo University, Egypt
| | - Farouk K El-Baz
- Department of Plant Biochemistry, National Research Centre, Giza, Egypt
| | - Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Egypt
| | - Gamila H Ali
- Department of Water Pollution, National Research Centre, Giza, Egypt
| | - Rania M El-Hazek
- Department of Drug Radiation Research, National Centre for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| |
Collapse
|
20
|
Nematallah KA, Ayoub NA, Abdelsattar E, Meselhy MR, Elmazar MM, El-Khatib AH, Linscheid MW, Hathout RM, Godugu K, Adel A, Mousa SA. Polyphenols LC-MS2 profile of Ajwa date fruit (Phoenix dactylifera L.) and their microemulsion: Potential impact on hepatic fibrosis. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.08.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
21
|
Fayek NM, Monem ARA, Mossa MY, Meselhy MR. New triterpenoid acyl derivatives and biological study of Manilkara zapota (L.) Van Royen fruits. Pharmacognosy Res 2013; 5:55-9. [PMID: 23798877 PMCID: PMC3685764 DOI: 10.4103/0974-8490.110505] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 05/17/2012] [Revised: 07/24/2012] [Accepted: 04/15/2013] [Indexed: 11/20/2022] Open
Abstract
β-amyrin-3-(3’-dimethyl) butyrate, a new natural compound was isolated from the fruits of Manilkara zapota (L.) Van Royen, in addition to lupeol-3-acetate and 4-caffeoylquinic acid (cryptochlorogenic acid). The structures of these compounds were identified using different spectral methods (IR, MS, UV, 1H-NMR, 13C-NMR and 2D-NMR). The alcoholic and aqueous extracts of the unripe fruits, in addition to their aqueous homogenate exhibited antioxidant, antihyperglycemic and hypocholesterolemic activities.
Collapse
Affiliation(s)
- Nesrin M Fayek
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | | | | | | |
Collapse
|
22
|
El-Mekkawy S, Meselhy MR, Nkobole N, Lall N. Three new α-glucosidase inhibitors from guggul, the oleogum resin ofCommiphora wightii. Nat Prod Res 2013; 27:146-54. [DOI: 10.1080/14786419.2012.662651] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
23
|
Fayek NM, Monem ARA, Mossa MY, Meselhy MR, Shazly AH. Chemical and biological study of Manilkara zapota (L.) Van Royen leaves (Sapotaceae) cultivated in Egypt. Pharmacognosy Res 2012; 4:85-91. [PMID: 22518080 PMCID: PMC3326762 DOI: 10.4103/0974-8490.94723] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [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: 08/06/2011] [Revised: 09/23/2011] [Accepted: 04/07/2012] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Manilkara zapota (L.) Van Royen is an evergreen tree, native to the tropical Americas and introduced to Egypt as a fruiting tree in 2002. No previous study was reported on the plant cultivated in Egypt. MATERIALS AND METHODS In this study, the leaves of the plant cultivated in Egypt were subjected to phytochemical and biological investigations. The lipoidal matter was analyzed by GLC. Five compounds were isolated from the petroleum ether and ethyl acetate fractions of the alcoholic extract of the leaves by chromatographic fractionation on silica gel and sephadex, the structures of these compounds were identified using IR, UV, MS, (1)H-NMR and (13)C-NMR. The LD(50) of the alcoholic and aqueous extracts of the leaves was determined and their antihyperglycemic, hypocholesterolemic and antioxidant activities were tested by enzymatic colorimetric methods using specific kits. RESULTS Unsaturated fatty acids represent 32.32 % of the total fatty acids, oleic acid (13.95%), linoleidic acid (10.18 %) and linoleic acid (5.96 %) were the major ones. The isolated compounds were identified as lupeol acetate, oleanolic acid, apigenin-7-O-α-L-rhamnoside, myricetin-3-O-α-L-rhamnoside and caffeic acid. This is the first report about isolation of these compounds from Manilkara zapota except myricetin-3-O-α-L-rhamnoside, which was previously isolated from the plant growing abroad. The LD(50) recorded 80 g/Kg b. wt. for both the tested extracts, so they could be considered to be safe. They exhibited antihyperglycemic, hypocholesterolemic and antioxidant activities. CONCLUSION The observed biological activities were attributed to the different chemical constituents present in the plant mainly its phenolic constituents.
Collapse
Affiliation(s)
- Nesrin M Fayek
- Department of Pharmacognosy, Cairo University, Cairo, Egypt
| | | | | | | | | |
Collapse
|
24
|
Basu NK, Kubota S, Meselhy MR, Ciotti M, Chowdhury B, Hartori M, Owens IS. Gastrointestinally Distributed UDP-glucuronosyltransferase 1A10, Which Metabolizes Estrogens and Nonsteroidal Anti-inflammatory Drugs, Depends upon Phosphorylation. J Biol Chem 2004; 279:28320-9. [PMID: 15117964 DOI: 10.1074/jbc.m401396200] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Among gastrointestinal distributed isozymes encoded at the UGT1 locus, UDP-glucuronosyltransferase 1A10 (UGT1A10) metabolizes a number of important chemicals. Similar to broad conversion of phytoestrogens (Basu, N. K., Ciotti, M., Hwang, M. S., Kole, L., Mitra, P. S., Cho, J. W., and Owens, I. S. (2004) J. Biol. Chem. 279, 1429-1441), UGT1A10 metabolized estrogens and their derivatives, whereas UGT1A1, -1A3, -1A7, and -1A8 differentially exhibited reduced activity toward the same. UGT1A10 compared with UGT1A7, -1A8, and -1A3 generally exhibited high activity toward acidic nonsteroidal anti-inflammatory drugs and natural benzaldehyde derivatives, while UGT1A3 metabolized most efficiently aromatic transcinnamic acids known to be generated from flavonoid glycosides by microflora in the lower gastrointestinal tract. Finally UGT1A10, -1A7, -1A8, and -1A3 converted plant-based salicylic acids; methylsalicylic acid was transformed at high levels, and acetylsalicylic (aspirin) and salicylic acid were transformed at moderate to low levels. Atypically UGT1A10 transformed estrogens between pH 6 and 8 but acidic structures preferentially at pH 6.4. Furthermore evidence indicates UGT1A10 expressed in COS-1 cells depends upon phosphorylation; UGT1A10 versus its single, double, and triple mutants at three predicted protein kinase C phosphorylation sites incorporated [(33)P]-orthophosphate and showed a progressive decrease with no detectable label or activity for the triple T73A/T202A/S432G-1A10 mutant. Single and double mutants revealed either null/full activity or null/additive activity, respectively. Additionally UGT1A10-expressing cultures glucuronidated 17beta-[(14)C]estradiol, whereas cultures containing null mutants at protein kinase C sites showed no estrogen conversion. Importantly UGT1A10 in cells supported 10-fold higher glucuronidation of 17beta-estradiol than UGT1A1. In summary, our results suggest gastrointestinally distributed UGT1A10 is important for detoxifying estrogens/phytoestrogens and aromatic acids with complementary activity by UGT1A7, -1A8, -1A3, and/or -1A1 evidently dependent upon phosphorylation.
Collapse
Affiliation(s)
- Nikhil K Basu
- Heritable Disorders Branch, National Institute of Child Health & Human Development, National Institutes of Health, Room 9S-21, Building 10, Bethesda, MD 20892, USA
| | | | | | | | | | | | | |
Collapse
|
25
|
Tohda C, Matsumoto N, Zou K, Meselhy MR, Komatsu K. Abeta(25-35)-induced memory impairment, axonal atrophy, and synaptic loss are ameliorated by M1, A metabolite of protopanaxadiol-type saponins. Neuropsychopharmacology 2004; 29:860-8. [PMID: 15010693 DOI: 10.1038/sj.npp.1300388] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We previously screened neurite outgrowth activities of several Ginseng drugs in human neuroblastoma, and demonstrated that protopanaxadiol (ppd)-type saponins were active constituents. Since ppd-type saponins are known to be completely metabolized to 20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol (M1) by intestinal bacteria when taken orally, M1 and ginsenoside Rb1, as a representative of ppd-type saponins, were examined for cognitive disorder. In a mouse model of Alzheimer's disease (AD) by Abeta(25-35) i.c.v. injection, impaired spatial memory was recovered by p.o. administration of ginsenoside Rb1 or M1. Although the expression levels of phosphorylated NF-H and synaptophysin were reduced in the cerebral cortex and the hippocampus of Abeta(25-35)-injected mice, their levels in ginsenoside Rb1- and M1-treated mice were almost completely recovered up to control levels. Potencies of the effects were not different between ginsenoside Rb1 and M1 when given orally, suggesting that most of the ginsenoside Rb1 may be metabolized to M1, and M1 is an active principal of ppd-type saponins for the memory improvement. In cultured rat cortical neurons, M1 showed extension activity of axons, but not dendrites. The axon-specific outgrowth was seen even when neuritic atrophy had already progressed in response to administration of Abeta(25-35) as well as in the normal condition. These results suggest that M1 has axonal extension activity in degenerated neurons, and improve memory disorder and synaptic loss induced by Abeta(25-35). M1 was shown to be effective in vitro and in vivo, indicating that Ginseng drugs containing ppd-type saponins may reactivate neuronal function in AD by p.o. administration.
Collapse
Affiliation(s)
- Chihiro Tohda
- 1Research Center for Ethnomedicines, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Toyama, Japan
| | | | | | | | | |
Collapse
|
26
|
Abstract
Three new (1-3) and five known compounds (4-8) were isolated from the oleogum resin of Commiphora wightii (Arnott.) Bhanol. Their structures were elucidated by spectroscopic and chemical methods. The MeOH extract and the EtOAc-sol. fraction were found to demonstrate significant inhibition of NO formation in lipopolysaccharide (LPS)-activated murine macrophages J774.1 in vitro (IC(50) values of 16.4 and 12.8 microg/ml, respectively). When compared with curcumin (IC(50) value of 12.3 microM), Z- and E-Guggulsterones (4 and 5, respectively) were the most potent inhibitors of NO production (IC(50) values of 1.1 and 3.3 microM, respectively), followed by myrrhanol A (7) and myrrhanone A (8) (IC(50) values of 21.1 and 42.3 microM, respectively). Guggulsterone-M (1) and its didehydro derivative (2) were weak inhibitors, while guggulsterols I (6) and Y (3) were inactive (IC(50) >500 microM).
Collapse
Affiliation(s)
- Meselhy R Meselhy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Kasr el-Aini Street, 11562 Cairo, Egypt.
| |
Collapse
|
27
|
Tohda C, Matsumoto N, Zou K, Meselhy MR, Komatsu K. Axonal and dendritic extension by protopanaxadiol-type saponins from ginseng drugs in SK-N-SH cells. Jpn J Pharmacol 2002; 90:254-62. [PMID: 12499580 DOI: 10.1254/jjp.90.254] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Extension of axons and dendrites in neurons may compensate for and repair damaged neuronal networks in the dementia brain. To find out drugs capable of regenerating the neuronal network, we focused on several herbal drugs belonging to the genus Panax, kinds of Ginseng, and investigated neurite outgrowth activity of their extracts and compounds. We found that the methanol extracts of Ginseng (root of P. ginseng), Notoginseng (root of P. notoginseng) and Ye-Sanchi in Chinese (rhizome of a relative to P. vietnamensis) increased neurite outgrowth in SK-N-SH cells. The protopanaxadiol-type saponins, ginsenosides Rb(1) and Rb(3), and notoginsenosides R(4) and Fa isolated from Ye-Sanchi extract extended neurites, while protopanaxatriol-, ocotillol- and oleanane-type saponins had no effect on the neurite outgrowth. The percentage of cells with multipolar neurites and number of varicosities were intensely high in cells treated with the methanol extract of Ye-Sanchi as well as ginsenosides Rb(1) and Rb(3), and notoginsenosides R(4) and Fa. Both phosphorylated NF-H-expressing neurites and MAP2-expressing ones were extended by treatment with those saponins and the extract. Especially, longer neurites were mainly positive for phosphorylated NF-H. These results suggest that protopanaxadiol-type saponins enhance axonal and dendritic formation activity.
Collapse
Affiliation(s)
- Chihiro Tohda
- Research Center for Ethnomedicines, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Toyama, Japan
| | | | | | | | | |
Collapse
|
28
|
Zou K, Zhu S, Meselhy MR, Tohda C, Cai S, Komatsu K. Dammarane-type Saponins from Panax japonicus and their neurite outgrowth activity in SK-N-SH cells. J Nat Prod 2002; 65:1288-1292. [PMID: 12350149 DOI: 10.1021/np0201117] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four new dammarane-type saponins (1-4), named yesanchinosides G-J, together with nine ginsenosides (5-13) were isolated from Ye-Sanchi, the underground part of Panax japonicus collected in the south of Yunnan Province, China. Their structures were elucidated on the basis of spectroscopic and chemical methods. Ginsenosides Rb(1) and Rb(3) and notoginsenosides R(4) (6) and Fa (7) showed significant neurite outgrowth enhancing activities in human neuroblastoma SK-N-SH cells.
Collapse
Affiliation(s)
- Kun Zou
- Research Center for Ethnomedicines, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Japan
| | | | | | | | | | | |
Collapse
|
29
|
Aboutabl EA, Meselhy MR, Afifi MS. Iridoids from Phlomis aurea Decne growing in Egypt. Pharmazie 2002; 57:646-7. [PMID: 12369456] [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: 02/26/2023]
Abstract
A new iridoid gentiobioside (4, assigned the name phlomiside) was isolated from the leaves of Phlomis aurea growing in Egypt, in addition to auroside (1), lamiide (2), 8-epi-loganin (3), forsythoside B (5), quercetin-3-O-beta-D-glucopyranoside (6) and kaempferol-3-O-beta-D-glucopyranosyl-(1-6)-beta-D-glucopyranoside (7). Structures of these compounds were elucidated by conventional methods of analysis as well as by different spectroscopic techniques.
Collapse
Affiliation(s)
- E A Aboutabl
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Egypt.
| | | | | |
Collapse
|
30
|
Abstract
The ether fraction of the defatted ethanol extract of the aerial parts of Caralluma penicillata (defl) M. E. Br. (Asclepiadaceae) yielded four new oxypregnane glycosides, penicillosides D-G. The structures of the isolated compounds were established by different spectroscopic methods.
Collapse
Affiliation(s)
- Essam Abdel-Sattar
- Department of Pharmacognosy, College of Pharmacy, Cairo University, Cairo, Egypt.
| | | | | |
Collapse
|
31
|
Wang LQ, Meselhy MR, Li Y, Nakamura N, Min BS, Qin GW, Hattori M. The heterocyclic ring fission and dehydroxylation of catechins and related compounds by Eubacterium sp. strain SDG-2, a human intestinal bacterium. Chem Pharm Bull (Tokyo) 2001; 49:1640-3. [PMID: 11767089 DOI: 10.1248/cpb.49.1640] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A human intestinal bacterium, Eubacterium (E.) sp. strain SDG-2, was tested for its ability to metabolize various (3R)- and (3S)-flavan-3-ols and their 3-O-gallates. This bacterium cleaved the C-ring of (3R)- and (3S)-flavan-3-ols to give 1,3-diphenylpropan-2-ol derivatives, but not their 3-O-gallates. Furthermore, E. sp. strain SDG-2 had the ability of p-dehydroxylation in the B-ring of (3R)-flavan-3-ols, such as (-)-catechin, (-)-epicatechin, (-)-gallocatechin and (-)-epigallocatechin, but not of (3S)-flavan-3-ols, such as (+)-catechin and (+)-epicatechin.
Collapse
Affiliation(s)
- L Q Wang
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
| | | | | | | | | | | | | |
Collapse
|
32
|
Nawawi A, Nakamura N, Meselhy MR, Hattori M, Kurokawa M, Shiraki K, Kashiwaba N, Ono M. In vivo antiviral activity of Stephania cepharantha against herpes simplex virus type-1. Phytother Res 2001; 15:497-500. [PMID: 11536378 DOI: 10.1002/ptr.881] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The antiviral activity of a MeOH extract of Stephania cepharantha (root tubers), its CHCl3-soluble fraction (alkaloid fraction) and the major alkaloid FK-3000 (1) were investigated in BALB/c mice cutaneously infected with HSV-1 strain 7401H. At doses of 125 and 250 mg/kg body weight, p.o., the MeOH extract significantly delayed skin lesion on score 2 (vesicles in the local region), limited the development of further lesions on score 6 (mild zosteriform lesion) and prolonged the mean survival time of HSV-1 infected mice. After p.o. administration of the CHCl3-soluble fraction at doses of 25 and 50 mg/kg or FK-3000 (1) at 10 and 25 mg/kg, similar results were obtained. Although the alkaloid improved the survival of infected mice, it had a narrow therapeutic index.
Collapse
Affiliation(s)
- A Nawawi
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama, 930-0194, Japan
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Abdel-Hafez AA, Meselhy MR, Nakamura N, Hattori M, El-Gendy MA, Mahfouz NM, Mohamed TA. New paeonilactone-A adducts formed by anaerobic incubation of paeoniflorin with Lactobacillus brevis in the presence of arylthiols. Chem Pharm Bull (Tokyo) 2001; 49:918-20. [PMID: 11456104 DOI: 10.1248/cpb.49.918] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
During the course of preparing anticonvulsant paeonimetabolin-I adducts, new paeonilactone-A adducts: 9-phenylthiopaeonilactone-A, 9-(o-tolylthio)paeonilactone-A, 9-(m-tolylthio)paeonilactone-A, 9-(p-tolylthio)-paeonilactone-A and 9-(2-naphthylthio)paeonilactone-A, were obtained along with expected paeonimetabolin-I adducts by anaerobic incubation of paeoniflorin from peony roots with Lactobacillus brevis in the presence of the aromatic thiols, phenylthiol, o-tolylthiol, m-tolylthiol, p-tolylthiol and 2-naphthylthiol. The structures of these compounds were determined by spectroscopic methods including two dimensional (2D) NMR.
Collapse
Affiliation(s)
- A A Abdel-Hafez
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
| | | | | | | | | | | | | |
Collapse
|
34
|
Wang LQ, Meselhy MR, Li Y, Qin GW, Hattori M. Human intestinal bacteria capable of transforming secoisolariciresinol diglucoside to mammalian lignans, enterodiol and enterolactone. Chem Pharm Bull (Tokyo) 2000; 48:1606-10. [PMID: 11086885 DOI: 10.1248/cpb.48.1606] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Seven metabolites were isolated after anaerobic incubation of secoisolariciresinol diglucoside (1) with a human fecal suspension. They were identified as (-)-secoisolariciresinol (2), 3-demethyl-(-)-secoisolariciresinol (3), 2-(3-hydroxybenzyl)-3-(4-hydroxy-3-methoxybenzyl)butane-1,4-diol (4), didemethylsecoisolariciresinol (5), 2(3-hydroxybenzyl)-3-(3,4-dihydroxybenzyl)butane-1,4-diol (6), enterodiol (7) and enterolactone (8). Furthermore, two bacterial strains, Peptostreptococcus sp. SDG-1 and Eubacterium sp. SDG-2, responsible for the transformation of 1 to a mammalian lignan 7, were isolated from a human fecal suspension. The former transformed 2 to 3 and 5, as well as 4 to 6, and the latter transformed 5 to 6 and 7.
Collapse
Affiliation(s)
- L Q Wang
- Institute of Natural Medicine, Toyama Mledical and Pharmaceutical University, Sugitani, Toyama, Japan
| | | | | | | | | |
Collapse
|
35
|
Wang LQ, Nakamura N, Meselhy MR, Hattori M, Zhao WM, Cheng KF, Yang RZ, Qin GW. Four mono-tetrahydrofuran ring acetogenins, montanacins B-E, from Annona montana. Chem Pharm Bull (Tokyo) 2000; 48:1109-13. [PMID: 10959572 DOI: 10.1248/cpb.48.1109] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Four novel mono-tetrahydrofuran (THF) acetogenins, montanacins B-E (1-4), were isolated from the ethanolic extract of the leaves of Annona montana. The structures of 1-4 were established by spectroscopic methods and their absolute stereochemistries were determined by the advanced Mosher ester method. Montancins D (3) and E (4) bear a non-adjacent tetrahydropyran (THP) ring along with a THF ring and are the most unusual type of acetogenins discovered so far.
Collapse
Affiliation(s)
- L Q Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Li Y, Meselhy MR, Wang LQ, Ma CM, Nakamura N, Hattori M. Biotransformation of a C-glycosylflavone, abrusin 2''-O-beta-D-apioside, by human intestinal bacteria. Chem Pharm Bull (Tokyo) 2000; 48:1239-41. [PMID: 10959599 DOI: 10.1248/cpb.48.1239] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
After anaerobic incubation of abrusin 2''-O-beta-D-apioside (1) with a human fecal suspension, five metabolites were isolated and identified as abrusin (2), 1-(2',6'-dihydroxy-3',4'-dimethoxyphenyl)-3-(4''-hydroxyphenyl)propan-1- one (5), 5,6-dimethoxybenzene-1,3-diol (6), 3-(4'-hydroxyphenyl)propionic acid (7) and 3-phenylpropionic acid (8). However, methyl ether derivatives of abrusin (4'-O-methylabrusin and 4'-O-, 5-O-dimethylabrusin) resisted degradation under the same conditions.
Collapse
Affiliation(s)
- Y Li
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
| | | | | | | | | | | |
Collapse
|
37
|
Abstract
Five phorbol diesters, together with three known ones, were isolated from a MeOH extract of the seeds of Croton tiglium, and their structures were determined by spectroscopic methods and selective hydrolysis of acyl groups. These compounds were assessed for their abilities to inhibit an HIV-induced cytopathic effect (CPE) on MT-4 cells and to activate protein kinase C (PKC) associated with tumor-promoting action. 12-O-Acetylphorbol-13-decanoate and 12-O-decanoylphorbol-13-(2-methylbutyrate) effectively inhibited the cytopathic effect of HIV-1 [complete inhibitory concentration (IC100) values of 7.6 ng/ml and 7.81 microg/ml, and minimum cytotoxic concentration (CC0) value of 62.5 and 31.3 microg/ml, respectively]; however, 12-O-acetylphorbol-13-decanoate showed no activation of PKC at concentrations of 10 and 100 ng/ml. 12-O-Tetradecanoylphorbol-13-acetate (TPA) was found to be not only the most potent inhibitor of HIV-1-induced CPE (IC100 value of 0.48 ng/ml), but also the most potent activator of PKC (100% activation at 10 ng/ml).
Collapse
Affiliation(s)
- S El-Mekkawy
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
| | | | | | | | | | | |
Collapse
|
38
|
Abstract
Seven phenolic compounds were isolated from a MeOH extract of the leaves of Grevillea robusta. Their structures were determined by various spectral methods including 2D NMR spectroscopy.
Collapse
Affiliation(s)
- A S Ahmed
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
| | | | | | | | | | | |
Collapse
|
39
|
el-Mekkawy S, Meselhy MR, Nakamura N, Hattori M, Kawahata T, Otake T. 12-O-acetylphorbol-13-decanoate potently inhibits cytopathic effects of human immunodeficiency virus type 1 (HIV-1), without activation of protein kinase C. Chem Pharm Bull (Tokyo) 1999; 47:1346-7. [PMID: 10517016 DOI: 10.1248/cpb.47.1346] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Through bioactivity-guided fractionation, eight phorbol diesters, including five new ones (1-5), were isolated from the seeds of Croton tiglium collected in Egypt. 12-O-Acetylphorbol-13-decanoate (6) and 12-O-decanoylphorbol-13-(2-methylbutyrate) (4) potently inhibited the HIV-1-induced cytopathic effect on MT-4 cells (IC100 values of 7.6 ng/ml and 7.81 micrograms/ml, and CC0 values of 62.5 micrograms/ml and 31.3 micrograms/ml, respectively) without activating protein kinase C.
Collapse
Affiliation(s)
- S el-Mekkawy
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | |
Collapse
|
40
|
Abdel-Hafez AA, Meselhy MR, Nakamura N, Hattori M, Watanabe H, Murakami Y, El-Gendy MA, Mahfouz NM, Mohamed TA. Anticonvulsant activity of paeonimetabolin-I adducts obtained by incubation of paeoniflorin and thiol compounds with Lactobacillus brevis. Biol Pharm Bull 1999; 22:491-7. [PMID: 10375170 DOI: 10.1248/bpb.22.491] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Seventeen thiopaeonimetabolin-I adducts were obtained as mixtures of diastereoisomers after incubation of paeoniflorin with Lactobacillus brevis in the presence of various thiols. The anticonvulsant activity of the adducts was investigated in mice using the maximal subcutaneous pentylenetetrazol seizure test and sodium valproate (1.5 mmol/kg) as a positive control. Thirteen adducts showed dose-dependent prolongation of latencies of clonic and tonic convulsions. Maximal protection against convulsions was effectively demonstrated by 8-(n-hexylthio)paeonimetabolin I (8) and 8-benzoylthiopaeonimetabolin I (18) at doses of 0.125 and 0.25 mmol/kg, respectively, while 100% protection was only achieved at 0.5 mmol/kg of 8-cyclopentylthiopaeonimetabolin I and 8-(p-tolylthio)paeonimetabolin I. The principal anticonvulsant activity of the diastereoisomers of 8 and 18 was attributed to their 7S-isomers [ED50 values of 0.09 and 0.12 mmol/kg, and protective indices of 5.0 and 4.0 for 8 (7S) and 18 (7S), respectively], while the 7R counterparts [8 (7R) and 18 (7R)] showed a muscle relaxation effect.
Collapse
|
41
|
Abdel-Hafez AA, Meselhy MR, Nakamura N, Hattori M, Watanabe H, Murakami Y, El-Gendy MA, Mahfouz NM, Mohamed TA. Effects of paeoniflorin derivatives on scopolamine-induced amnesia using a passive avoidance task in mice; structure-activity relationship. Biol Pharm Bull 1998; 21:1174-9. [PMID: 9853408 DOI: 10.1248/bpb.21.1174] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Paeoniflorin (1) and its derivatives having in common a cage-like pinane skeleton with hemiketal-acetal system, were evaluated for their effects on memory impairment induced by scopolamine in mice using a step-down type passive avoidance task. In the test session, 1 and its derivatives were intraperitoneally (i.p.) administered at doses of 0.002, 0.01, 0.02 and 0.2 mmol/kg, and 30 min later (15 min before the experiment), scopolamine (1 mg/kg, i.p.) was given. These compounds showed dose-dependent attenuation in a dose range of 0.002-0.02 mmol/kg and also enhancement of scopolamine-induced decrease in step-down latency. The effects of these compounds, except that of 2',3',4',5'-O-tetraacetyl-3-O-methylpaeoniflorin (8), followed a bell-shaped dose response profile. 8-Debenzoyl-6-deglucosyl-3-O-methylpaeoniflorin (6) showed no significant increase in the step-down latency at all tested doses. Maximum step-down latency was obtained by 3-O-methylpaeoniflorin (3) and 2',3,3',4',5'-penta-O-methylpaeoniflorin (7) (the minimal effective dose was 0.002 mmol/kg). Relative to 3, debenzoylation, as in 8-debenzoyl-3-O-methylpaeoniflorin (4), slightly increased the latency, while deglucosylation, as in 6-deglucosyl-3-O-methylpaeoniflorin (5), significantly reduced the prolongation of latency. Removal of both glucose and benzoyl moieties resulted in the loss of activity as seen in 6. These results revealed that, in addition to the cage-like pinane skeleton, the benzoyl and the glucosyl moieties are important structural elements of the paeoniflorin skeleton as its effects on scopolamine-induced amnesia.
Collapse
Affiliation(s)
- A A Abdel-Hafez
- Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
el-Mekkawy S, Meselhy MR, Nakamura N, Tezuka Y, Hattori M, Kakiuchi N, Shimotohno K, Kawahata T, Otake T. Anti-HIV-1 and anti-HIV-1-protease substances from Ganoderma lucidum. Phytochemistry 1998; 49:1651-7. [PMID: 9862140 DOI: 10.1016/s0031-9422(98)00254-4] [Citation(s) in RCA: 193] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A new highly oxygenated triterpene named ganoderic acid alpha has been isolated from a methanol extract of the fruiting bodies of Ganoderma lucidum together with twelve known compounds. The structures of the isolated compounds were determined by spectroscopic means including 2D-NMR. Ganoderiol F and ganodermanontriol were found to be active as anti-HIV-1 agents with an inhibitory concentration of 7.8 micrograms ml-1 for both, and ganoderic acid B, ganoderiol B, ganoderic acid C1, 3 beta-5 alpha-dihydroxy-6 beta-methoxyergosta-7,22-diene, ganoderic acid alpha, ganoderic acid H and ganoderiol A were moderately active inhibitors against HIV-1 PR with a 50% inhibitory concentration of 0.17-0.23 mM.
Collapse
Affiliation(s)
- S el-Mekkawy
- Research Institute for Traditional Sino-Japanese Medicines, Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Abdel-Hafez AA, Meselhy MR, Nakamura N, Hattori M, Watanabe H, Mohamed TA, Mahfouz NM, el-Gendy MA. Potent anticonvulsant paeonimetabolin-I derivatives obtained by incubation of paeoniflorin and thiol compounds with Lactobacillus brevis. Chem Pharm Bull (Tokyo) 1998; 46:1486-7. [PMID: 9775444 DOI: 10.1248/cpb.46.1486] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Seventeen thiopaeonimetabolin-I adducts were obtained as mixtures of diastereoisomers after incubation of paeoniflorin with Lactobacillus brevis in the presence of various thiols. Four compounds, 8-(n-hexylthio)- (8), 8-cyclopentylthio-, 8-(p-tolyl)thio- and 8-benzoylthio- (18) paeonimetabolins, showed 100% protection against pentylenetetrazole-induced convulsions at doses of 0.125, 0.25, or 0.50 mmol/kg, relative to valproic acid (100% protection at 1.5 mmol/kg). For 8 and 18, the principle anticonvulsant activity resided in the (7S)-isomers while (7R)-isomers showed muscle relaxation effects.
Collapse
Affiliation(s)
- A A Abdel-Hafez
- Research Institute for Wakan-Yaku, Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Kida H, Akao T, Meselhy MR, Hattori M. Metabolism and pharmacokinetics of orally administered saikosaponin b1 in conventional, germ-free and Eubacterium sp. A-44-infected gnotobiote rats. Biol Pharm Bull 1998; 21:588-93. [PMID: 9657043 DOI: 10.1248/bpb.21.588] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The metabolic fate of saikosaponin b1 (1) was investigated using conventional, germ-free and Eubacterium sp. A-44-infected gnotobiote rats. After the oral administration of 1 to germ-free rats at a dose of 50 mg/kg, no metabolite was detected in the plasma, the cecal contents or the cumulative feces through the experiment. On the other hand, when 1 was orally given to the Eubacterium sp. A-44-infected gnotobiote rats, considerable amounts of its metabolites, prosaikogenin A (2) and saikogenin A (3), were detected in the rat plasma with the respective AUC0-10 h values of 17,424 and 22,260 pmol.min/ml, similar to the case of its oral administration to conventional rats (AUC0-10 h values of 9,936 and 12,414 pmol.min/ml for 2 and 3, respectively). Furthermore, significant amounts of both metabolites were detected in the cecal contents and the cumulative feces of the gnotobiote and conventional rats, but not in those of the germ-free rats, within 10 h after the administration. Fecal and cecal activities of hydrolyzing 1 and 2 were found in the gnotobiote and conventional rats, though there were no detectable activities in the germ-free rats. Accordingly, both hydrolyzing activities in the intestinal bacteria, such as Eubacterium sp. A-44, are essential for the appearance of 2 and 3 in the rat plasma and cumulative feces, since orally administered 1 was poorly absorbed from the gastrointestinal tract.
Collapse
Affiliation(s)
- H Kida
- Department of Cell-Resources Engineering, Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama, Japan
| | | | | | | |
Collapse
|
45
|
Kida H, Akao T, Meselhy MR, Hattori M. Enzymes responsible for the metabolism of saikosaponins from Eubacterium sp. A-44, a human intestinal anaerobe. Biol Pharm Bull 1997; 20:1274-8. [PMID: 9448103 DOI: 10.1248/bpb.20.1274] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
From a human intestinal bacterium, Eubacterium sp. A-44, which is capable of hydrolyzing saikosaponins to saikogenins, two glycosidases, beta-D-glucosidase and a novel type of beta-D-fucosidase, were isolated and characterized as saikosaponin-hydrolyzing beta-D-glucosidase and prosaikogenin-hydrolyzing beta-D-fucosidase. Relative to the hydrolyzing activities toward saikosaponins a, b1 and b2, the beta-D-glucosidase showed lower ability to hydrolyze saikosaponin d, but no ability to hydrolyze saikosaponin c or prosaikogenins. By Sephacryl S-300 column chromatography, the molecular weight of prosaikogenin-hydrolyzing beta-D-fucosidase was estimated to be about 130 kDa. The beta-D-fucosidase could hydrolyze prosaikogenins A and F, but not prosaikogenins D and G or saikosaponins. Relative to p-nitrophenyl beta-D-fucoside-hydrolyzing activity, this enzyme had 32.0% and 22.2% of its hydrolyzing ability toward p-nitrophenyl beta-D-glucoside and p-nitrophenyl beta-D-galactoside, respectively. p-Nitrophenyl beta-D-fucoside-hydrolyzing activity was inhibited by D-fucose, and was weakly inhibited by D-glucose, D-glucono delta-lactone, D-galactose and D-galactono delta-lactone. By combining these two glycosidases, saikosaponins a and b1 were converted to their saikogenins via the corresponding prosaikogenins.
Collapse
Affiliation(s)
- H Kida
- Department of Cell-Resources Engineering, Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Sugitani, Toyama, Japan
| | | | | | | |
Collapse
|
46
|
Abstract
The biotransformation of (-)-epicatechin 3-O-gallate (1) and related compounds was undertaken using a human fecal suspension. Of fifteen metabolites isolated, four compounds were new, namely, two epimers of 1-(3'-hydroxyphenyl)-3-(2",4".6"-trihydroxyphenyl)propan-2-ols (6, 19); 2",3"-dihydroxyphenoxyl 3-(3',4'-dihydroxyphenyl)propionate (14) and 1-(3',4'-dihydroxyphenyl)-3-(2",4",6"-trihydroxyphenyl)propan-2-ol (18). (-)-Epicatechin (2), (-)-epigallocatechin (16) and their 3-O-gallates (1, 17) were extensively metabolized by a human fecal suspension after incubation for 24 h, whereas the gallates (1, 17) resisted any degradation by a rat fecal suspension, even after a prolonged incubation time (48 h), suggesting a difference in metabolic ability between two intestinal bacterial mixtures from different species.
Collapse
Affiliation(s)
- M R Meselhy
- Research Institute for Wakan-Yaku, Toyama Medical and Pharmaceutical University, Japan
| | | | | |
Collapse
|
47
|
el-Mekkawy S, Meselhy MR, Kusumoto IT, Kadota S, Hattori M, Namba T. Inhibitory effects of Egyptian folk medicines on human immunodeficiency virus (HIV) reverse transcriptase. Chem Pharm Bull (Tokyo) 1995; 43:641-8. [PMID: 7541317 DOI: 10.1248/cpb.43.641] [Citation(s) in RCA: 110] [Impact Index Per Article: 3.8] [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] [Indexed: 01/25/2023]
Abstract
Extracts of 41 medicinal plants used in Egyptian folk medicine were screened for their inhibitory effects on human immunodeficiency virus-1 reverse transcriptase. The extracts of fruits of Phyllanthus emblica, Quercus pedunculata, Rumex cyprius, Terminalia bellerica, Terminalia chebula and Terminalia horrida showed significant inhibitory activity with IC50 < or = 50 micrograms/ml. Through a bioassay guided-fractionation of the methanol extract of the fruit of P. emblica, putranjivain A (1) was isolated as a potent inhibitory substance with IC50 = 3.9 microM, together with 1,6-di-O-galloyl-beta-D-glucose (2), 1-O-galloyl-beta-D-glucose (3), kaempferol-3-O-beta-D-glucoside (4), quercetin-3-O-beta-D-glucoside (5) and digallic acid (6). The inhibitory mode of action by 1, 2 and 6 was non-competitive with respect to the substrate but competitive with respect to a template-primer. Furthermore, the stereochemistry of 1 was established in this paper by nuclear magnetic resonance spectroscopy.
Collapse
Affiliation(s)
- S el-Mekkawy
- Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | |
Collapse
|
48
|
|
49
|
Meselhy MR, Kadota S, Momose Y, Hatakeyama N, Kusai A, Hattori M, Namba T. Two new quinochalcone yellow pigments from Carthamus tinctorius and Ca2+ antagonistic activity of tinctormine. Chem Pharm Bull (Tokyo) 1993; 41:1796-802. [PMID: 8281577 DOI: 10.1248/cpb.41.1796] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Two new quinochalcone C-glycosides, hydroxysafflor yellow A (1a) and tinctormine (2a), were isolated from Carthamus tinctorius L. (Compositae) together with carthamin, safflor yellow B and safflomin C. The structures of 1a and 2a have been determined by spectroscopic methods including heteronuclear multiple-bond multiple-quantum coherence and linked scan FAB-MS. The latter compound (2a) was demonstrated to have potent Ca2+ antagonistic action.
Collapse
Affiliation(s)
- M R Meselhy
- Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University, Japan
| | | | | | | | | | | | | |
Collapse
|
50
|
el-Mekkawy S, Meselhy MR, Kawata Y, Kadota S, Hattori M, Namba T. Metabolism of strychnine N-oxide and brucine N-oxide by human intestinal bacteria. Planta Med 1993; 59:347-350. [PMID: 8103941 DOI: 10.1055/s-2006-959698] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Anaerobic incubation of strychnine N-oxide with human intestinal bacteria resulted in its transformation to strychnine and 16-hydroxystrychnine. Similarly, brucine N-oxide was transformed to brucine and 16-hydroxybrucine.
Collapse
Affiliation(s)
- S el-Mekkawy
- Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University
| | | | | | | | | | | |
Collapse
|