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Šeremet D, Durgo K, Kosanović J, Huđek Turković A, Mandura Jarić A, Vojvodić Cebin A, Komes D. Studying the Functional Potential of Ground Ivy ( Glechoma hederacea L.) Extract Using an In Vitro Methodology. Int J Mol Sci 2023; 24:16975. [PMID: 38069297 PMCID: PMC10707382 DOI: 10.3390/ijms242316975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023] Open
Abstract
Glechoma hederacea L., known as ground ivy, has a long history of use in folk medicine. The main bioactive compounds in ground ivy are polyphenolic compounds known for their potent antioxidant and antimicrobial activities and thus have high potential as functional ingredients against bacterial infections and the occurrence of chronic diseases associated with oxidative stress in the human body. The aim of the present study was to determine the biological activity of ground ivy extract on selected human cell lines, including hepatic (HepG2), tongue (CAL 27), gastric (AGS) and colon (Caco-2) cancer cell lines by evaluating cytotoxicity, formation of reactive oxygen species and genotoxicity. The antioxidant capacity of the extract was additionally evaluated using cellular model macromolecules of protein and DNA, bovine serum album and plasmid phiX174 RF1 DNA. The effect of ground ivy extract on representatives of human microflora, including L. plantarum, E. coli and S. aureus, was also studied. The cytotoxicity of the extract depended on the type of cells treated, and the pro-oxidant effect generally decreased with increasing exposure time. The most pronounced genoprotective effect against hydroxyl radical damage was monitored in model plasmid DNA and occurred at the highest tested concentration (0.25 mg mL-1), with 95.89% preservation of the supercoiled form of the plasmid. This concentration also had the most significant antioxidant activity on the model protein-14.01% more than the positive control prepared using Trolox. The ground ivy extract showed high antimicrobial potential against the pathogenic bacteria E. coli and S. aureus.
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Affiliation(s)
| | | | | | | | | | | | - Draženka Komes
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10 000 Zagreb, Croatia; (D.Š.); (K.D.); (J.K.); (A.H.T.); (A.M.J.); (A.V.C.)
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Singh S, Maurya AK, Meena A, Mishra N, Luqman S. Myricetin 3-rhamnoside retards the proliferation of hormone-independent breast cancer cells by targeting hyaluronidase. J Biomol Struct Dyn 2023:1-12. [PMID: 37732353 DOI: 10.1080/07391102.2023.2256872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 09/02/2023] [Indexed: 09/22/2023]
Abstract
Breast cancer is the second-leading cause of cancer-related death in women and the most often diagnosed malignancy. As the majority of chemotherapeutic medications are associated with recurrence, drug resistance, and side effects, scientists are shifting to beneficial agents for prevention and treatment, such as natural molecules. Myricetin 3-rhamnoside, a natural flavonol glycoside is known for diverse pharmacological activities but fewer reports describe the antiproliferative ability. The study aims to investigate the antiproliferative efficacy and target [hyaluronidase (HYAL) and ornithine decarboxylase (ODC), two poor breast cancer prognostic markers] modulatory potential of myricetin 3-rhamnoside on breast cancer cell lines using cytotoxicity assays and in silico docking, molecular dynamics analysis, cell-free and cell-based test methods. Myricetin 3-rhamnoside significantly retard the growth of MDA-MB-231 cells in SRB (IC50 88.64 ± 7.14 µM) and MTT (56.26 ± 8.50 µM) assay. It suppressed the transition of cells to the S-phase by inducing arrest in the G0/G1 phase with a fold change of 1.10. It shows robust binding interaction with ODC (-7.90 kcal/mol) and HYAL (-9.46 kcal/mol) and inhibits ODC (15.22 ± 2.61 µM) and HYAL (11.92 ± 2.89 µM) activity, but in a cell-based assay, the prominent response was observed against HYAL (21.46 ± 4.03 µM). Besides, it shows a 1.38 fold-down regulation of HYAL and forms a stable complex with HYAL. The binding pocket for myricetin 3-rhamnoside and the simulation pocket during the simulation are identical, indicating that myricetin 3-rhamnoside is actively blocking hyaluronidase. The computational prediction suggests it is a safe molecule. These observations imply that myricetin 3-rhamnoside could be used as a pharmacophore to design and synthesize a novel and safe agent for managing hormone-independent breast cancer.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Shilpi Singh
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Akhilesh Kumar Maurya
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
| | - Nidhi Mishra
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, India
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Singh S, Maurya AK, Meena A, Mishra N, Luqman S. Myricitrin from bayberry as a potential inhibitor of cathepsin-D: Prospects for squamous lung carcinoma prevention. Food Chem Toxicol 2023; 179:113988. [PMID: 37586679 DOI: 10.1016/j.fct.2023.113988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/07/2023] [Accepted: 08/12/2023] [Indexed: 08/18/2023]
Abstract
Cathepsin-D (CATD) inhibitors' design and development drawn interest due to their potential therapeutic applications in managing different cancer types, including lung cancer. This study investigated myricitrin, a flavonol-3-O-rhamnoside, for its binding affinity to CATD. Molecular docking experiments revealed a strong binding affinity (-7.8 kcal/mol). Molecular dynamics (MD) simulation confirmed the complex's stability, while enzyme activity studies showed inhibitory concentration (IC50) of 35.14 ± 6.08 μM (in cell-free) and 16.00 ± 3.48 μM (in cell-based) test systems. Expression analysis indicated downregulation of CATD with a fold change of 1.35. Myricitrin demonstrated antiproliferative effects on NCIH-520 cells [IC50: 64.11 μM in Sulphorhodamine B (SRB), 24.44 μM in 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)], but did not affect healthy CHANG cells. It also prolonged the G2/M phase (at 10 μM: 1.19-fold; at 100 μM: 1.13-fold) and increased sub-diploid population by 1.35-fold. Based on the analysis done using SwissADME program, it is predicted that myricitrin is not a cytochrome p450s (CYPs) inhibitor, followed the rule of Ghose and found not permeable to the blood-brain barrier (BBB) which suggests it as a safe molecule. In summary, the experimental findings may establish the foundation for myricitrin and its analogues to be used therapeutically in CATD-mediated lung cancer prevention.
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Affiliation(s)
- Shilpi Singh
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Akhilesh Kumar Maurya
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Nidhi Mishra
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Xiao S, Wu Y, Gao S, Zhou M, Liu Z, Xiong Q, Jiang L, Yuan G, Li L, Yang L. Deciphering the Hazardous Effects of AFB1 and T-2 Toxins: Unveiling Toxicity and Oxidative Stress Mechanisms in PK15 Cells and Mouse Kidneys. Toxins (Basel) 2023; 15:503. [PMID: 37624260 PMCID: PMC10467080 DOI: 10.3390/toxins15080503] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023] Open
Abstract
In China, animal feeds are frequently contaminated with a range of mycotoxins, with Aflatoxin B1 (AFB1) and T-2 toxin (T-2) being two highly toxic mycotoxins. This study investigates the combined nephrotoxicity of AFB1 and T-2 on PK15 cells and murine renal tissues and their related oxidative stress mechanisms. PK15 cells were treated with the respective toxin concentrations for 24 h, and oxidative stress-related indicators were assessed. The results showed that the combination of AFB1 and T-2 led to more severe cellular damage and oxidative stress compared to exposure to the individual toxins (p < 0.05). In the in vivo study, pathological examination revealed that the kidney tissue of mice exposed to the combined toxins showed signs of glomerular atrophy. The contents of oxidative stress-related indicators were significantly increased in the kidney tissue (p < 0.05). These findings suggest that the combined toxins cause significant oxidative damage to mouse kidneys. The study highlights the importance of considering the combined effects of mycotoxins in animal feed, particularly AFB1 and T-2, which can lead to severe nephrotoxicity and oxidative stress in PK15 cells and mouse kidneys. The findings have important implications for animal feed safety and regulatory policy.
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Affiliation(s)
- Shuai Xiao
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Yingxin Wu
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Suisui Gao
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Mingxia Zhou
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Zhiwei Liu
- Wuhan Animal Disease Control Center, No. 170, Erqi Road, Jiang’an District, Wuhan 430014, China;
| | - Qianbo Xiong
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Lihuang Jiang
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Guoxiang Yuan
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Linfeng Li
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
| | - Lingchen Yang
- College of Veterinary Medicine, Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China; (S.X.); (Y.W.); (S.G.); (M.Z.); (Q.X.); (L.J.); (G.Y.); (L.L.)
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Singh S, Maurya AK, Meena A, Mishra N, Luqman S. Narirutin. A flavonoid found in citrus fruits modulates cell cycle phases and inhibits the proliferation of hormone-refractory prostate cancer cells by targeting hyaluronidase. Food Chem Toxicol 2023; 174:113638. [PMID: 36708865 DOI: 10.1016/j.fct.2023.113638] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/18/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Narirutin is a dietary flavanone found in lemons, oranges, passion fruit, bergamot and grapefruit. It possesses anti-allergic, cardioprotective, neuroprotective, hepatoprotective potential, and its enriched fraction suppresses the growth of prostate cancer cells; however, there is currently no information on the chemopreventive potential of narirutin alone against hormone-refractory prostate cancer cells (PC-3) and its mode of action. Thus, the chemopreventive possibility of narirutin was investigated in PC-3 cells by utilising cytotoxicity assays. Further, a mechanism was deduced targeting hyaluronidase, an early-stage diagnosis marker, by cell-free, cell-based and in silico studies. The results indicate that narirutin reduced the viability of PC-3 cells with the inhibitory concentration range of 66.87-59.80 μM. It induced G0/G1 phase arrest with a fold change of 1.12. Besides, it increased the generation of reactive oxygen species (ROS) with a fold change of 1.34 at 100 μM. Narirutin inhibited hyaluronidase's activity in cell-free (11.17 μM) and cell-based assays (67.23 μM) and showed a strong binding interaction with hyaluronidase. Finally, the MD simulation analysis supported the idea that narirutin binding enhanced compactness and stability and created a stable complex with hyaluronidase. In addition, ADMET prediction indicates that it is a non-toxic, non-CYPs inhibitor and thus didn't alter the metabolism. The results reveal that narirutin may be a potential chemopreventive agent for hormone-resistant prostate cancer cells in addition to offering data for supporting diet-based nutraceutical agents to prevent prostate cancer.
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Affiliation(s)
- Shilpi Singh
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Akhilesh Kumar Maurya
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Nidhi Mishra
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Singh S, Maurya AK, Meena A, Mishra N, Luqman S. Narirutin downregulates lipoxygenase-5 expression and induces G0/G1 arrest in triple-negative breast carcinoma cells. Biochim Biophys Acta Gen Subj 2023; 1867:130340. [PMID: 36868290 DOI: 10.1016/j.bbagen.2023.130340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 02/16/2023] [Accepted: 02/26/2023] [Indexed: 03/05/2023]
Abstract
BACKGROUND Triple-negative breast cancer (TNBC) accounts for 20% of breast cancer that does not express HER2, progesterone and estrogen receptors. It is associated with a high mortality rate, morbidity, metastasis, recurrence, poor prognosis and resistance to chemotherapy. Lipoxygenase-5 (LOX-5), cyclooxygenase-2 (COX-2), cathepsin-D (CATD), ornithine decarboxylase (ODC) and dihydrofolate reductase (DHFR) are involved in breast cancer carcinogenesis; hence, there is a pressing need to identify novel chemicals that targets these enzymes. Narirutin, a flavanone glycoside abundantly present in citrus fruits, is reported to have immune-modulatory, anti-allergic and antioxidant potential. Still, the cancer chemopreventive mechanism against TNBC has not been explored. METHODS In vitro experiments, enzyme activity, expression analysis, molecular docking and MD simulation were carried out. RESULTS Narirutin suppressed the growth of MDA-MB-231 and MCF-7 in a dose-proportional manner. The pronounced effect with >50% inhibition was observed in SRB and MTT assays for MDAMB-231 cells. Unexpectedly, narirutin suppressed the proliferation of normal cells (24.51%) at 100 μM. Further, narirutin inhibits the activity of LOX-5 in cell-free (18.18 ± 3.93 μM) and cell-based (48.13 ± 7.04 μM) test systems while moderately affecting COX-2, CATD, ODC and DHFR activity. Moreover, narirutin revealed a down-regulation of LOX-5 expression with a fold change of 1.23. Besides, MD simulation experiments confirm that narirutin binding forms a stable complex with LOX-5 and improves the stability and compactness of LOX-5. In addition, the prediction analysis demonstrates that narirutin could not cross the blood-brain barrier and did not act as an inhibitor of different CYPs. CONCLUSIONS AND SIGNIFICANCE Narirutin could be a potent cancer chemopreventive lead for TNBC, further paving the way for synthesizing novel analogues.
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Affiliation(s)
- Shilpi Singh
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Akhilesh Kumar Maurya
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| | - Nidhi Mishra
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, Uttar Pradesh, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, Uttar Pradesh, India; Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
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Abu-Kheit R, Kotev-Emeth S, Hiram-Bab S, Gabet Y, Savion N. S-allylmercapto- N-acetylcysteine protects bone cells from oxidation and improves femur microarchitecture in healthy and diabetic mice. Exp Biol Med (Maywood) 2022; 247:1489-1500. [PMID: 35658550 PMCID: PMC9493761 DOI: 10.1177/15353702221095047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Oxidative stress is involved in the deterioration of bone quality and mechanical strength in both diabetic and aging adults. Therefore, we studied the ability of the antioxidant compound, S-allylmercapto-N-acetylcysteine (ASSNAC) to protect bone marrow stromal cells (BMSCs) from advanced glycation end-products (AGEs) cytotoxicity and improve bone microarchitecture of adult healthy and obese/diabetic (db/db) female mice. ASSNAC effect on AGEs-treated cultured rat BMSCs was evaluated by Neutral Red and XTT cell survival and reactive oxygen species (ROS) level assays. Its effect on healthy (C57BL/6) and obese/diabetic (C57BLKS/J Leprdb+/+; db/db) female mice femur parameters, such as (1) number of adherent BMSCs, (2) percentage of CD73+/CD45- cells in bone marrow (BM), (3) glutathione level in BM cells, and (4) femur microarchitecture parameters by microcomputed tomography, was studied. ASSNAC treatment protected BMSCs by significantly decreasing AGEs-induced ROS production and increasing their cellular resistance to the cytotoxic effect of AGEs. ASSNAC treatment of healthy female mice (50 mg/kg/day; i.p.; age 12-20 weeks) significantly increased the number of BMSCs (+60%), CD73+/CD45- cells (+134%), and glutathione level (+110%) in the femur bone marrow. Furthermore, it increased the femur length (+3%), cortical diameter (+3%), and cortical areal moment of inertia (Ct.MOI; +10%) a surrogate for biomechanical strength. In db/db mice that demonstrated a compromised trabecular bone and growth plate microarchitecture, ASSNAC treatment restored the trabecular number (Tb.N, +29%), bone volume fraction (Tb.BV/TV, +130%), and growth plate primary spongiosa volumetric bone mineral density (PS-vBMD, +7%) and thickness (PS-Th, +18%). In conclusion, this study demonstrates that ASSNAC protects bone marrow cells from oxidative stress and may improve bone microarchitecture in adult healthy and diabetic female mice.
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Affiliation(s)
- Reem Abu-Kheit
- Department of Human Molecular Genetics and
Biochemistry and Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv
University, Tel Aviv 6997801, Israel
| | - Shlomo Kotev-Emeth
- Department of Human Molecular Genetics and
Biochemistry and Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv
University, Tel Aviv 6997801, Israel
| | - Sahar Hiram-Bab
- Department of Anatomy and Anthropology,
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Yankel Gabet
- Department of Anatomy and Anthropology,
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Naphtali Savion
- Department of Human Molecular Genetics and
Biochemistry and Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv
University, Tel Aviv 6997801, Israel;,Naphtali Savion.
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Cytotoxic activity of strawberry tree ( Arbutus unedo L.) honey, its extract, and homogentisic acid on CAL 27, HepG2, and Caco-2 cell lines. ARHIV ZA HIGIJENU RADA I TOKSIKOLOGIJU 2022; 73:158-168. [PMID: 35792769 PMCID: PMC9287835 DOI: 10.2478/aiht-2022-73-3653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 05/01/2022] [Indexed: 11/28/2022]
Abstract
Strawberry tree (Arbutus unedo L.) honey (STH), also known as “bitter honey”, is a traditional medicine widely used in the Mediterranean area. Regardless of geographical origin, it usually has a very high content of phenolic compounds and strong antioxidant capacity. Yet, little is still known about the effects of STH, its phenolic extract (STHE), and its main bioactive compound – homogentisic acid (HGA) – at the cell level. The aim of this study was to estimate total phenolic content, DPPH radical scavenging activity, and ferric reducing antioxidant power of STH made in Croatia and investigate cytotoxic and pro-oxidative effects of STH, STHE and HGA on three human cell lines: tongue squamous cell carcinoma (CAL 27), hepatocellular carcinoma (HepG2), and epithelial colorectal adenocarcinoma cells (Caco-2) cells. These substances were tested at four concentrations (0.5–5× average human daily intake of STH) and over 30 min and 1 and 2 h. Croatian STH had a total phenolic content of 1.67 g gallic acid equivalents (GAE) per kg of honey, DPPH radical scavenging activity of 2.96 mmol Trolox equivalents (TE) per kg of honey, and ferric reducing antioxidant power (FRAP) of 13.5 mmol Fe2+ per kg of honey. Our results show no clear and consistent time- or concentration-dependent cytotoxicity in any of the cell lines. ROS levels in all the three cell types at almost all exposure times were not significantly higher than control. The most important observation is that the tested substances have low cytotoxicity and high biocompatibility, regardless of concentration, which is a good starting point for further research of their biological effects in other models.
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Fatima K, Luqman S, Meena A. Carvacrol Arrests the Proliferation of Hypopharyngeal Carcinoma Cells by Suppressing Ornithine Decarboxylase and Hyaluronidase Activities. Front Nutr 2022; 9:857256. [PMID: 35464036 PMCID: PMC9028219 DOI: 10.3389/fnut.2022.857256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/24/2022] [Indexed: 11/28/2022] Open
Abstract
Carvacrol, a monoterpene known for its pharmacological activities, is present in the essential oil of Origanum majorana, Origanum vulgare, Thymus vulgaris, and Lippia graveolens. It is used in food as a flavoring and preservative agent in cosmetics and medicines because of its useful bioactivities in clinical practice. However, carvacrol was not much explored for its anticancer potential. Targeting enzymes involved in carcinogenesis, such as ornithine decarboxylase (ODC), cyclooxygenase-2 (COX-2), lipoxygenase-5 (LOX-5), and hyaluronidase (HYAL) by monoterpenes are amongst the efficient approaches for cancer prevention and treatment. In this study, the efficacy of carvacrol was investigated against deregulated cancer biomarkers/targets in organ-specific human cancer cell lines (FaDu, K562, and A549) utilizing in vitro, in silico, and in vivo approaches. The efficacy of carvacrol was evaluated on human cancer cell lines using neutral red uptake (NRU), sulpho rhodamine B (SRB), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assays. The mechanistic study was carried out in cell-based test systems. Further, the potency of carvacrol was confirmed by the quantitative real-time PCR analysis and molecular docking studies. The in vivo anti-tumor potential of carvacrol was performed on mice S-180 model, and the toxicity examination was accomplished through in silico approach. Carvacrol significantly impeded the growth of FaDu, K562, and A549 cell lines with IC50 values ranging from 9.61 ± 0.05 to 81.32 ± 11.83 μM. Further, the efficacy of carvacrol was explored against different cancer targets in FaDu, K562, and A549 cell lines. Carvacrol inhibits the ODC, COX-2, LOX-5, and HYAL activities in FaDu cell line and ODC, COX-2, and HYAL activities in K562 cell line. The results were validated by expression analysis revealing the downregulation of the targeted gene with a significant change in the transcript level of ODC and HYAL in FaDu cell line with a fold change of 1.56 and 1.61, respectively. A non-significant effect of carvacrol was observed on the downstream signaling pathway of PI3K and HIF-1α/vascular endothelial growth factor (VEGF) in FaDu cells. The cell cycle, reactive oxygen species (ROS), mitochondrial membrane potential (MMP), and Annexin V-fluorescein isothiocyanate (FITC) experiments demonstrate that carvacrol induces apoptosis of FaDu cells. Further, the potency of carvacrol was also evaluated in vivo on mice S-180 tumor model, wherein it inhibits tumor growth (72%) at 75 mg/kg body weight (bw). ADMET studies predicted carvacrol as a safe molecule. Overall, carvacrol delayed the growth of FaDu, K562, and A549 cell lines by targeting enzymes involved in the carcinogenesis process. The existence of one hydroxyl group at the para position of carvacrol could be responsible for the anti-proliferative activity. Thus, carvacrol could be used as a pharmacophore to develop a safe and effective multi-targeted anti-cancer medicament.
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Affiliation(s)
- Kaneez Fatima
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- *Correspondence: Suaib Luqman
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Neomenthol prevents the proliferation of skin cancer cells by restraining tubulin polymerization and hyaluronidase activity. J Adv Res 2022; 34:93-107. [PMID: 35024183 PMCID: PMC8655237 DOI: 10.1016/j.jare.2021.06.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 06/07/2021] [Accepted: 06/07/2021] [Indexed: 11/28/2022] Open
Abstract
Introduction Neomenthol, a cyclic monoterpenoid, is a stereoisomer of menthol present in the essential oil of Mentha spp. It is used in food as a flavoring agent, in cosmetics and medicines because of its cooling effects. However, neomenthol has not been much explored for its anticancer potential. Additionally, targeting hyaluronidase, Cathepsin-D, and ODC by phytochemicals is amongst the efficient approach for cancer prevention and/or treatment. Objectives To investigate the molecular and cell target-based antiproliferative potential of neomenthol on human cancer (A431, PC-3, K562, A549, FaDu, MDA-MB-231, COLO-205, MCF-7, and WRL-68) and normal (HEK-293) cell lines. Methods The potency of neomenthol was evaluated on human cancer and normal cell line using SRB, NRU and MTT assays. The molecular target based study of neomenthol was carried out in cell-free and cell-based test systems. Further, the potency of neomenthol was confirmed by quantitative real-time PCR analysis and molecular docking studies. The in vivo anticancer potential of neomenthol was performed on mice EAC model and the toxicity examination was accomplished through in silico, ex vivo and in vivo approaches. Results Neomenthol exhibits a promising activity (IC50 17.3 ± 6.49 μM) against human epidermoid carcinoma (A431) cells by arresting the G2/M phase and increasing the number of sub-diploid cells. It significantly inhibits hyaluronidase activity (IC50 12.81 ± 0.01 μM) and affects the tubulin polymerization. The expression analysis and molecular docking studies support the in vitro molecular and cell target based results. Neomenthol prevents EAC tumor formation by 58.84% and inhibits hyaluronidase activity up to 10% at 75 mg/kg bw, i.p. dose. The oral dose of 1000 mg/kg bw was found safe in acute oral toxicity studies. Conclusion Neomenthol delayed the growth of skin carcinoma cells by inhibiting the tubulin polymerization and hyaluronidase activity, which are responsible for tumor growth, metastasis, and angiogenesis.
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Key Words
- AA, Arachidonic acid
- AKLP, Alkaline phosphatase
- Ab/Am, Antibiotic/antimycotic
- BE, Binding energy
- BIL, Bilirubin total & direct
- BSA, Bovine serum albumin
- BUN, Blood urea nitrogen
- CATD, Cathepsin D
- CHOL, Cholesterol
- CM-H2DCFDA, Chloromethyl derivative of dichloro fluorescin diacetate
- COX-2, Cyclooxygenase 2
- CRTN, Creatinine
- Cancer biomarker
- DCFDA, 2′,7′ dichloro fluorescin diacetate
- DFMO, α-difluoro methyl ornithine
- DHFR, Dihydrofolatereductase
- DMEM, Dulbecco’s minimal essential media
- DMSO, Dimethyl sulfoxide
- DNA, Deoxyribonucleic acid
- DOXO, Doxorubicin
- EAC, Ehlrich Ascites Carcinoma
- EC50, Half maximal effective concentration
- EDTA, Ethylene diamine tetra acetic acid
- ELISA, enzyme-linked immunosorbent assay
- Ehrlich Ascites Carcinoma
- FACS, Fluorescence-Activated Cell Sorting
- FBS, Fetal bovine serum
- FDA, Food and Drug Administration
- FOX, Ferrous oxidation-xylenol orange
- GAPDH, Glyceraldehyde 3-phosphate dehydrogenase, HEPES, N-2-hydroxyethylpiperazine-N′-2-ethanesulfonic acid
- HA, Hyaluronic acid
- HDAC, Histone deacetylase
- HDL, High density lipoprotein
- HYAL, Hyaluronidase
- Human epidermoid carcinoma
- Hyaluronidase
- IC50, Half maximal inhibitory concentration
- IDT, Integrated DNA Technologies
- Ki, Inhibitory constant
- LDH, Lactate dehydrogenase
- LOX-5, Lipoxygenase-5
- MEF, Mean erythrocyte fragility
- MMP, Mitochondrial membrane potential
- MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- MTX, Methotrexate
- NAC, N-acetyl cysteine
- NADPH, Nicotinamide adenine dinucleotide phosphate hydrogen
- NRU, Neutral red uptake
- NaOH, Sodium hydroxide
- Neomenthol
- ODC, Ornithine decarboxylase
- OECD, Organization for Economic Co-operation and Development
- OF, Osmotic fragility
- PBS, Phosphate buffer saline
- PCR, Polymerase chain reaction
- PDB, Protein Data Bank
- PDT, Podophyllotoxin
- PEP A, pepstatin A
- PI, Propidium iodide
- PI3K, Phosphotidyl inositol-3 kinase
- PKB/Akt, Protein kinase B
- RBC, Red blood cell
- RIPA, Radio immune precipitation assay buffer
- RNA, Ribonucleic acid
- RNase A, Ribonuclease A
- ROS, Reactive oxygen species
- RPMI, Roswell park memorial institute
- Rh123, Rhodamine 123
- SGOT, Aspartate aminotransferase
- SGPT, Alanine aminotransferase
- SRB, Sulphorhodamine B
- TCA, Tricarboxylic acid
- TMPD, N,N,N′,N′-tetramethyl-p-phenylenediamine
- TNBS, Trinitrobenzenesulphonic acid
- TPA, 12-O-Tetradecanoylphorbol-13-acetate
- TPR, Total protein
- TRIG, Triglyceraldehyde
- TRPM8, Transient receptor potential member 8
- Tubulin
- URIC, Uric acid
- WBC, White blood cell
- mTOR, Mammalian target of rapamycin
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Fagundes TR, Bortoleti B, Camargo P, Concato V, Tomiotto-Pellissier F, Carloto A, Panis C, Bispo M, Junior FM, Conchon-Costa I, Pavanelli W. Patterns of Cell Death Induced by Thiohydantoins in Human MCF-7 Breast Cancer Cells. Anticancer Agents Med Chem 2021; 22:1592-1600. [PMID: 34382528 DOI: 10.2174/1871520621666210811102441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 06/29/2021] [Accepted: 07/12/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Conventional therapies for breast cancer is still a challenge due to use of cytotoxic drugs not highly effective with major adverse effects. Thiohydantoins, are biologically active heterocyclic compounds reported by several biological activities, including anticarcinogenic properties, i.e., this work aimed to assess the use of thiohydantoin as a potential antitumor agent against MCF-7 breast cancer cells. METHODS MTT and neutral red assays were used to assess the possible cytotoxic activity of compounds against MCF-7 cells. Cell volume measurement and analysis were performed by flow cytometry, fluorescence analysis was carried out to determine patterns of cell death induced by thiohydantoins. RESULTS The treatment with micromolar doses of thiohydantoins promoted a decrease in the viability of MCF-7 breast tumor cells. Also were observed the increase in ROS and NO production, reduction in cell volume, loss of membrane integrity, mitochondrial depolarization, and increased fluorescence for annexin V and caspase-3. These findings indicate cell death by apoptosis and increased formation of autophagic vacuoles and stopping the cell cycle in the G1/ G0 phase. CONCLUSIONS Our results indicate that thiohydantoins are cytotoxic to breast tumor cells, and this effect is linked to the increase in ROS production. This phenomenon changes tumorigenic pathways, that lead to a halt of the cell cycle in G1/G0, an important checkpoint for DNA errors, which may have altered the process by which cells produce energy, causing a decrease in mitochondrial viability and thus leading to the apoptotic process. Furthermore, the results indicate increased autophagy, a vital process linked to a decrease in lysosomal viability and considered as a cell death and tumor suppression mechanism.
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Affiliation(s)
- Tatiane Renata Fagundes
- Laboratory of Immunoparasitology of Neglected Diseases and Cancer, State University of Londrina, PR. Brazil
| | - Bruna Bortoleti
- Graduate Program in Biosciences and Biotechnology, Carlos Chagas Institute (ICC), Fiocruz, Curitiba, PR. Brazil
| | - Priscila Camargo
- Laboratory of Properties and Synthesis of Organic Substances, Department of Chemistry, Center of Exact Sciences, Londrina State University, PR. Brazil
| | - Vírgínia Concato
- Laboratory of Immunoparasitology of Neglected Diseases and Cancer, State University of Londrina, PR. Brazil
| | | | - Amanda Carloto
- Laboratory of Immunoparasitology of Neglected Diseases and Cancer, State University of Londrina, PR. Brazil
| | - Carolina Panis
- Laboratory of Tumor Biology, State University of Western Paraná, Francisco Beltrão, Paraná. Brazil
| | - Marcelle Bispo
- Laboratory of Properties and Synthesis of Organic Substances, Department of Chemistry, Center of Exact Sciences, Londrina State University, PR. Brazil
| | - Fernando Macedo Junior
- Graduate Program in Biosciences and Biotechnology, Carlos Chagas Institute (ICC), Fiocruz, Curitiba, PR. Brazil
| | - Ivete Conchon-Costa
- Laboratory of Immunoparasitology of Neglected Diseases and Cancer, State University of Londrina, PR. Brazil
| | - Wander Pavanelli
- Laboratory of Immunoparasitology of Neglected Diseases and Cancer, State University of Londrina, PR. Brazil
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12
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Fatima K, Wani ZA, Meena A, Luqman S. Geraniol exerts its antiproliferative action by modulating molecular targets in lung and skin carcinoma cells. Phytother Res 2021; 35:3861-3874. [PMID: 33826182 DOI: 10.1002/ptr.7094] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 02/13/2021] [Accepted: 03/12/2021] [Indexed: 12/16/2022]
Abstract
Geraniol, an acyclic monoterpene present in several plant species' essential oils, is utilized as a food additive. It possesses potent antiproliferative and antitumor effects ascribed to its antiinflammatory, and antioxidant properties. The study aimed to understand geraniol's mechanism in human lung and skin cancer cells by employing molecular and cell target-based assays. SRB, NRU, MTT assays, qRT-PCR, molecular docking, and EAC model were used. Geraniol inhibits the proliferation of PC-3, A431, and A549 cells (~50%) and suppresses the activity of ornithine decarboxylase (15.42 ± 0.61 μM) and hyaluronidase (57.61 ± 8.53 μM) in A549 cells; LOX-5 (25.44 ± 3.50 μM) and hyaluronidase (90.71 ± 2.38 μM) in A431 cells. The qRT-expression analysis of the targeted gene depicts non-significant change at the transcriptional level of LOX-5 in A431 cells. A robust binding interaction of geraniol with molecular targets was observed in the molecular docking studies. In Ehrlich Ascites Carcinoma model, geraniol inhibit tumor growth by 50.08% at 75 mg/kg bw and was found to be safe up to 1,000 mg/kg bw in a toxicity study. Geraniol has two prenyl units allied head-to-tail and functionalized with one hydroxyl group at its tail end could be responsible for the antiproliferative activity. These observations provide evidence for geraniol to be used as a new prototype to develop a novel anticancer agent.
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Affiliation(s)
- Kaneez Fatima
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Zahoor Ahmad Wani
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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13
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Fatima K, Luqman S. Suppression of molecular targets and antiproliferative effect of citronellal in triple-negative breast cancer cells. Curr Mol Pharmacol 2021; 14:1156-1166. [PMID: 33687907 DOI: 10.2174/1874467214666210309120626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/12/2020] [Accepted: 01/06/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Triple-negative breast cancer (TNBC) requires targeted therapies to better manage and prevent metastatic mammary gland tumors. Due to the resistance problem associated with the approved drugs, researchers are now focusing on phytochemicals for the treatment of TNBC as they possess a pleiotropic mode of action and fewer side effects. OBJECTIVE To investigate the antiproliferative effect of citronellal in triple negative breast cancer cells. METHOD Anticancer potential of citronellal was explored by employing SRB, MTT and NRU antiproliferative assay. Further, the effect of citronellal was observed on molecular targets (Tubulin, COX-2 and LOX-5) utilizing in vitro and in silico methods. Furthermore, the efficacy of citronellal was examined on Ehrlich Ascites Carcinoma. In addition, the safety profiling of it was observed at 300 and 1000 mg/kg of body weight in mice. RESULTS Citronellal suppresses the growth of MDA-MB-231 cells by more than 50% in NRU assay and ~41% and 32% in SRB and MTT assay, respectively. Further, citronellal's effect was observed on molecular targets wherein it suppressed LOX-5 activity (IC50 40.63±2.27 µM) and prevented polymerization of microtubule (IC50 63.62 µM). The result was more prominent against LOX-5 as supported by molecular docking interaction studies, but a non-significant effect was observed at the transcriptional level. The efficacy of citronellal was also determined in Ehrlich Ascites Carcinoma (EAC) model, wherein it inhibited the growth of tumor cells (45.97%) at 75 mg/kg of body weight. It was non-toxic upto 1000 mg/kg of body weight in mice and did not cause significant lysis of erythrocytes. CONCLUSION These observations could provide experimental support for citronellal to be used as a chemopreventive agent for breast cancer.
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Affiliation(s)
- Kaneez Fatima
- Bioprospection and Product Development Division, Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, Uttar Pradesh. India
| | - Suaib Luqman
- Bioprospection and Product Development Division, Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow 226015, Uttar Pradesh. India
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14
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Fernández de Luco J, Recio-Balsells AI, Ghiano DG, Bortolotti A, Belardinelli JM, Liu N, Hoffmann P, Lherbet C, Tonge PJ, Tekwani B, Morbidoni HR, Labadie GR. Exploring the chemical space of 1,2,3-triazolyl triclosan analogs for discovery of new antileishmanial chemotherapeutic agents. RSC Med Chem 2020; 12:120-128. [PMID: 34046604 DOI: 10.1039/d0md00291g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/13/2020] [Indexed: 01/02/2023] Open
Abstract
Triclosan and isoniazid are known antitubercular compounds that have proven to be also active against Leishmania parasites. On these grounds, a collection of 37 diverse 1,2,3-triazoles based on the antitubercular molecules triclosan and 5-octyl-2-phenoxyphenol (8PP) were designed in search of novel structures with leishmanicidal activity and prepared using different alkynes and azides. The 37 compounds were assayed against Leishmania donovani, the etiological agent of leishmaniasis, yielding some analogs with activity at micromolar concentrations and against M. tuberculosis H37Rv resulting in scarce active compounds with an MIC of 20 μM. To study the mechanism of action of these catechols, we analyzed the inhibition activity of the library on the M. tuberculosis enoyl-ACP reductase (ENR) InhA, obtaining poor inhibition of the enzyme. The cytotoxicity against Vero cells was also tested, resulting in none of the compounds being cytotoxic at concentrations of up to 20 μM. Derivative 5f could be considered a valuable starting point for future antileishmanial drug development. The validation of a putative leishmanial InhA orthologue as a therapeutic target needs to be further investigated.
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Affiliation(s)
- Julia Fernández de Luco
- Instituto de Química Rosario, UNR, CONICET Suipacha 531 S2002LRK Rosario Argentina +54 341 4370477 +54 341 4370477
| | - Alejandro I Recio-Balsells
- Instituto de Química Rosario, UNR, CONICET Suipacha 531 S2002LRK Rosario Argentina +54 341 4370477 +54 341 4370477
| | - Diego G Ghiano
- Instituto de Química Rosario, UNR, CONICET Suipacha 531 S2002LRK Rosario Argentina +54 341 4370477 +54 341 4370477
| | - Ana Bortolotti
- Laboratorio de Microbiología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Rosario Santa Fe 3100 S2002KTR Rosario Argentina
| | - Juán Manuel Belardinelli
- Laboratorio de Microbiología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Rosario Santa Fe 3100 S2002KTR Rosario Argentina
| | - Nina Liu
- Department of Chemistry, Institute of Chemical Biology & Drug Discovery, Stony Brook University Stony Brook NY 11794 USA
| | - Pascal Hoffmann
- LSPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Christian Lherbet
- LSPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Peter J Tonge
- Department of Chemistry, Institute of Chemical Biology & Drug Discovery, Stony Brook University Stony Brook NY 11794 USA
| | - Babu Tekwani
- National Center for Natural Products Research & Department of Biomolecular Sciences, School of Pharmacy, University of Mississippi MS 38677 USA
| | - Héctor R Morbidoni
- Laboratorio de Microbiología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Rosario Santa Fe 3100 S2002KTR Rosario Argentina .,Consejo de Investigaciones, Universidad Nacional de Rosario Argentina
| | - Guillermo R Labadie
- Instituto de Química Rosario, UNR, CONICET Suipacha 531 S2002LRK Rosario Argentina +54 341 4370477 +54 341 4370477.,Departamento de Química Orgánica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
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15
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Ghiano DG, Recio-Balsells A, Bortolotti A, Defelipe LA, Turjanski A, Morbidoni HR, Labadie GR. New one-pot synthesis of anti-tuberculosis compounds inspired on isoniazid. Eur J Med Chem 2020; 208:112699. [PMID: 32927391 DOI: 10.1016/j.ejmech.2020.112699] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 07/22/2020] [Accepted: 07/25/2020] [Indexed: 12/15/2022]
Abstract
A library of thirty N-substituted tosyl N'-acryl-hydrazones was prepared with p-toluenesulfonyl hydrazide, methyl propiolate and different aldehydes in a one-pot synthesis via an aza-Michael reaction. The scope of the reaction was studied, including aliphatic, isoprenylic, aromatic and carbocyclic aldehydes. The prepared collection was tested against Mycobacterium tuberculosis H37Rv. Nine analogs of the collection showed Minimum Inhibitory Concentration ≤10 μM, of which the most active members (MIC of 1.25 μM) were exclusively E isomers. In order to validate the mechanism of action of the most active acrylates, we tested their activity on a M. tuberculosis InhA over-expressing strain obtaining MIC that consistently doubled those obtained on the wild type strain. Additionally, the binding mode of those analogs on M. tuberculosis InhA was investigated by docking simulations. The results displayed a hydrogen bond interaction between the sulfonamide and Ile194 and the carbonyl of the methyl ester with Tyr 158 (both critical residues in the interaction with the fatty acyl chain substrate), where the main differences on the binding mode relays on the hydrophobicity of the nitrogen substituent. Additionally, chemoinformatic analysis was performed to evaluate in silico possible cytotoxicity risk and ADME-Tox profile. Based on their simple preparation and interesting antimycobacterial activity profile, the newly prepared aza-acrylates are promising candidates for antitubercular drug development.
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Affiliation(s)
- Diego G Ghiano
- Instituto de Química Rosario, UNR, CONICET, Suipacha 531, S2002LRK, Rosario, Argentina
| | | | - Ana Bortolotti
- Laboratorio de Microbiología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Santa Fe 3100, S2002KTR, Rosario, Argentina
| | - Lucas A Defelipe
- IQUIBICEN-CONICET, Ciudad Universitaria, Pabellón 2, C1428EHA, Ciudad de Buenos Aires, Argentina; Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA, Ciudad de Buenos Aires, Argentina
| | - Adrián Turjanski
- IQUIBICEN-CONICET, Ciudad Universitaria, Pabellón 2, C1428EHA, Ciudad de Buenos Aires, Argentina; Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA, Ciudad de Buenos Aires, Argentina
| | - Héctor R Morbidoni
- Laboratorio de Microbiología Molecular, Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Santa Fe 3100, S2002KTR, Rosario, Argentina; Consejo de Investigaciones Científicas, Universidad Nacional de Rosario, Argentina
| | - Guillermo R Labadie
- Instituto de Química Rosario, UNR, CONICET, Suipacha 531, S2002LRK, Rosario, Argentina; Departamento de Química Orgánica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK, Rosario, Argentina.
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16
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Valorization of Banana and Red Beetroot Peels: Determination of Basic Macrocomponent Composition, Application of Novel Extraction Methodology and Assessment of Biological Activity In Vitro. SUSTAINABILITY 2020. [DOI: 10.3390/su12114539] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The nutritional and bioactive content of banana and red beetroot peels was investigated. The basic macrocomponent composition was determined using standard AOAC (Association of Official Analytical Chemists) methods, while the recovery efficiency of bioactive compounds was investigated using conventional and innovative extraction techniques (subcritical water extraction, ultrasound- and microwave-assisted extraction). Extracts were analyzed for biological effects in vitro on human hepatic, tongue and colon cancer cell lines. A macrocomponent analysis revealed a notable amount of dietary fiber in banana and beetroot peels (39.0 and 33.6% dmb) and a relatively high content of protein in beetroot peel (18.3% dmb). Regarding the micronutrients-minerals, banana and beetroot peels were shown to be a very good source of potassium (75.06 and 41.86 mg g−1 dmb). Both extracts of banana and beetroot peels obtained by conventional extraction - decoction (100 °C, 20 min) exhibited the highest total phenolic content and antioxidant capacity. Additionally, in banana peel, these extracts were the richest in dopamine content (12.63 mg g−1 dmb). Extraction by infusion (80 °C, 30 min) yielded a beetroot peel extract with the highest total betacyanin content (9.80 mg g−1 dmb). Biological effects in vitro were dose- and time-dependent, as well as influenced by the presence of polysaccharides.
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17
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Ling A, Sun L, Guo W, Sun S, Yang J, Zhao Z. Individual and combined cytotoxic effects of T-2 toxin and its four metabolites on porcine Leydig cells. Food Chem Toxicol 2020; 139:111277. [DOI: 10.1016/j.fct.2020.111277] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/17/2020] [Accepted: 03/15/2020] [Indexed: 01/29/2023]
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18
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Complexation of the local anesthetic pramoxine with hydroxypropyl-beta-cyclodextrin can improve its bioavailability. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101475] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Nablo BJ, Ahn JJ, Bhadriraju K, Lee JM, Reyes DR. Lens-Free Imaging as a Sensor for Dynamic Cell Viability Detection Using the Neutral Red Uptake Assay. ACS APPLIED BIO MATERIALS 2020; 3:10.1021/acsabm.0c01082. [PMID: 34151220 PMCID: PMC8209770 DOI: 10.1021/acsabm.0c01082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Neutral red is a low-cost supravital stain for determining cell viability. The standard protocol relies on a destructive extraction process to release the accumulated dye for endpoint spectrophotometric quantification. We report a non-destructive, live-cell quantification of neutral red uptake using a compact lens-free system. Two light sources indentify the cell perimeter and quantify neutral red uptake. The quantification occurs during staining, thus eliminating the destructive extraction process and reducing assay time. Our system enables live quantification for continuous high-throughput screening of cell viability within confined spaces such as incubators.
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Affiliation(s)
- Brian J. Nablo
- SOL Inc., H business Park, 26, Beobwon-ro 9-gil, SongPa-gu, Seoul, Korea
| | - Jung-Joon Ahn
- SOL Inc., H business Park, 26, Beobwon-ro 9-gil, SongPa-gu, Seoul, Korea
| | - Kiran Bhadriraju
- Physical Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD, United States
| | - Jong Muk Lee
- SOL Inc., H business Park, 26, Beobwon-ro 9-gil, SongPa-gu, Seoul, Korea
| | - Darwin R. Reyes
- Physical Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD, United States
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Ančić M, Huđek A, Rihtarić I, Cazar M, Bačun-Družina V, Kopjar N, Durgo K. PHYSICO chemical properties and toxicological effect of landfill groundwaters and leachates. CHEMOSPHERE 2020; 238:124574. [PMID: 31445332 DOI: 10.1016/j.chemosphere.2019.124574] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/29/2019] [Accepted: 08/10/2019] [Indexed: 06/10/2023]
Abstract
Waste landfills represent a global problem, which is more pronounced in developing countries because of the lack of resources to implement procedures that include separation and waste processing. The aim of this research was to analyze leachate and ground waters samples at the site, upstream and downstream from the landfill during different year seasons on a registered non-hazardous waste dump and to conduct physico-chemical and biological assays to determine potential risk for the ecosystem. Potential cytotoxic, prooxidative and mutagenic effects of leachates and water samples were evaluated on human laryngeal cell line (HEp2). Leachates collected at landfill site caused genotoxic effect and had a higher pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD) and elevated concentrations of phosphorus, chloride, nitrogen compounds and sulphate. Genotoxicity of the leachate was increased in samples collected in dry and warm period of the year. These results are in accordance to the physico-chemical analysis which revealed that during summer period, because of intense degradation process at high temperatures increased concentrations of different chemicals can be found in leachate. Groundwater collected downstream and upstream from landfill did not show statistically significant (geno)toxic effect, irrespective of the sampling season. Chemical analysis revealed that all compounds in groundwater were below permitted values. Purification process at landfill is effective and compounds that reach groundwater do not represent a toxicological threat.
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Affiliation(s)
- Mario Ančić
- Euroinspekt Croatiakontrola, d.o.o., Karlovačka cesta 4L, 10000, Zagreb, Croatia.
| | - Ana Huđek
- Faculty of Food Technology and Biotechnology, Pierottijeva 6, 10000, Zagreb, Croatia.
| | - Iva Rihtarić
- Euroinspekt Croatiakontrola, d.o.o., Karlovačka cesta 4L, 10000, Zagreb, Croatia.
| | - Mario Cazar
- Faculty of Food Technology and Biotechnology, Pierottijeva 6, 10000, Zagreb, Croatia
| | - Višnja Bačun-Družina
- Faculty of Food Technology and Biotechnology, Pierottijeva 6, 10000, Zagreb, Croatia.
| | - Nevenka Kopjar
- Institute for Medicine Research and Occupational Health, Ksaverska 2, 10000, Zagreb, Croatia.
| | - Ksenija Durgo
- Faculty of Food Technology and Biotechnology, Pierottijeva 6, 10000, Zagreb, Croatia.
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Rincic Mlinaric M, Durgo K, Katic V, Spalj S. Cytotoxicity and oxidative stress induced by nickel and titanium ions from dental alloys on cells of gastrointestinal tract. Toxicol Appl Pharmacol 2019; 383:114784. [PMID: 31628918 DOI: 10.1016/j.taap.2019.114784] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 10/12/2019] [Accepted: 10/14/2019] [Indexed: 12/30/2022]
Abstract
The aim was to explore the biological effect of nickel (Ni) and titanium (Ti) ions released from dental alloys. NiTi alloy were exposed to 40 mL of artificial saliva (pH = 4.8, t = 37 °C). The dynamics of Ni and Ti ions release during corrosion were recorded on the 3th, 7th and 14th day. Biological effect of Ni and Ti ions released from alloy was explored on cell lines of human tongue CAL 27, liver Hep G2 and colon Caco-2. Neutral Red uptake assay for the estimation of cell viability/cytotoxicity and 2',7'-dichlorofluorescein diacetate fluorimetric assay for reactive oxygen species were used. Cells were exposed to the following concentration of corrosion products: 5.0×, 1.0×, 0.5 and 0.1× during the period of 24, 48 and 72 h. To check the effect of each metal separately, cells were exposed to nickel-chloride and titanium-dioxide of corresponding concentration. The release of Ni is higher than of Ti (15.1-30.4 μg/L for Ni and 9.0-17.3 μg/L for Ti, respectively) and 5× higher concentrations are needed to induce cytotoxic effect. Ni and Ti ions alone do not induce a major cytotoxic effect, but their combination does indicating their synergistic effect. Increase in concentration of Ni and Ti tends to increase cytotoxicity, Ti more than Ni. Cytotoxicity and induction of free radicals are in strong positive linear correlation. Ions released from NiTi alloy during 14 days do not induce significant cytotoxic effect and would not have a clinically important impact. Cytotoxic effect is largely the result of the induction of free radicals.
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Affiliation(s)
| | - K Durgo
- University of Zagreb, Faculty of Food Technology and Biotechnology, Croatia
| | - V Katic
- University of Rijeka, Faculty of Dental Medicine, Department of Orthodontics, Croatia
| | - S Spalj
- University of Rijeka, Faculty of Dental Medicine, Department of Orthodontics, Croatia; J. J. Strossmayer University of Osijek, Faculty of Dental Medicine and Health, Department of Dental Medicine, Croatia
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22
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Steinkellner H, Binaglia M, Dall'Asta C, Gutleb AC, Metzler M, Oswald IP, Parent-Massin D, Alexander J. Combined hazard assessment of mycotoxins and their modified forms applying relative potency factors: Zearalenone and T2/HT2 toxin. Food Chem Toxicol 2019; 131:110599. [DOI: 10.1016/j.fct.2019.110599] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/14/2019] [Accepted: 06/18/2019] [Indexed: 01/27/2023]
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23
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Savion N, Dahamshi S, Morein M, Kotev-Emeth S. S-Allylmercapro- N-Acetylcysteine Attenuates the Oxidation-Induced Lens Opacification and Retinal Pigment Epithelial Cell Death In Vitro. Antioxidants (Basel) 2019; 8:antiox8010025. [PMID: 30654434 PMCID: PMC6357052 DOI: 10.3390/antiox8010025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 01/13/2019] [Accepted: 01/15/2019] [Indexed: 12/15/2022] Open
Abstract
The capacity of S-Allylmercapto-N-acetylcysteine (ASSNAC) to protect human retinal pigment epithelial (RPE) cells (line ARPE-19) and porcine lenses from oxidative stress was studied. Confluent ARPE-19 cultures were incubated with ASSNAC or N-acetyl-cysteine (NAC) followed by exposure to oxidants and glutathione level and cell survival were determined. Porcine lenses were incubated with ASSNAC and then exposed to H2O2 followed by lens opacity measurement and determination of glutathione (reduced (GSH) and oxidized (GSSG)) in isolated lens adhering epithelial cells (lens capsule) and fiber cells consisting the lens cortex and nucleus (lens core). In ARPE-19 cultures, ASSNAC (0.2 mM; 24 h) increased glutathione level by 2–2.5-fold with significantly higher increase in GSH compared to NAC treated cultures. Similarly, ex-vivo exposure of lenses to ASSNAC (1 mM) significantly reduced the GSSG level and prevented H2O2 (0.5 mM)-induced lens opacification. These results demonstrate that ASSNAC up-regulates glutathione level in RPE cells and protects them from oxidative stress-induced cell death as well as protects lenses from oxidative stress-induced opacity. Further validation of these results in animal models may suggest a potential use for ASSNAC as a protective therapy in retinal degenerative diseases as well as in attenuation of oxidative stress-induced lens opacity.
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Affiliation(s)
- Naphtali Savion
- Goldschleger Eye Research Institute and Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv 61390, Israel.
| | - Samia Dahamshi
- Goldschleger Eye Research Institute and Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv 61390, Israel.
| | - Milana Morein
- Goldschleger Eye Research Institute and Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv 61390, Israel.
| | - Shlomo Kotev-Emeth
- Goldschleger Eye Research Institute and Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv 61390, Israel.
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24
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Wang Q, Belščak-Cvitanović A, Durgo K, Chisti Y, Gong J, Sirisansaneeyakul S, Komes D. Physicochemical properties and biological activities of a high-theabrownins instant Pu-erh tea produced using Aspergillus tubingensis. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.01.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Bacherikov VA, Chittiboyina AG, Avery MA. Design, Synthesis, and Biological Evaluation of Peptidomimetic N-Substituted Cbz-4-Hyp-Hpa-Amides as Novel Inhibitors of Plasmodium falciparum. Chem Biodivers 2017; 14. [PMID: 28498611 DOI: 10.1002/cbdv.201700037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 05/08/2017] [Indexed: 11/10/2022]
Abstract
A new series of peptidomimetic N-substituted Cbz-4-Hyp-Hpa-amides were designed, synthesized, and evaluated for inhibition of the Plasmodium falciparum. Substituents on the N-atom of the amide group were selected alkyl-, allyl-, aryl-, 2-hydroxyethyl-, 2-cyanoethyl-, cyanomethyl-, 2-hydroxyethyl-, 2,2-diethoxyethyl-, or 2-ethoxy-2-oxoethylamino groups, and about of 40 new compounds were synthesized and evaluated for antiplasmodial activity in vitro. Antimalarial activity has been investigated as for the final peptide mimetics, and their immediate predecessors, carrying TBDMS or TBDPS protecting groups on 4-hydroxyproline residue and 18 derivatives exhibited toxicity against P. falciparum. Of these agents, compound 23e was shown to have potent antimalarial activity with IC50 528 ng/ml.
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Affiliation(s)
- Valeriy A Bacherikov
- Department of Medicinal Chemistry and Biology, Odessa Medical Institute, International Humanitarian University, Fontanskaya road, 33, Odessa, 65009, Ukraine
| | - Amar G Chittiboyina
- National Center for Natural Products Research, University of Mississippi, Oxford, MS, 38677, USA.,Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, Oxford, MS, 38677, USA
| | - Mitchell A Avery
- National Center for Natural Products Research, University of Mississippi, Oxford, MS, 38677, USA.,Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, Oxford, MS, 38677, USA
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26
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Rosas-Ramírez DG, Fragoso-Serrano M, Escandón-Rivera S, Vargas-Ramírez AL, Reyes-Grajeda JP, Soriano-García M. Resistance-modifying Activity in Vinblastine-resistant Human Breast Cancer Cells by Oligosaccharides Obtained from Mucilage of Chia Seeds (Salvia hispanica). Phytother Res 2017; 31:906-914. [PMID: 28425219 DOI: 10.1002/ptr.5815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/18/2017] [Accepted: 03/23/2017] [Indexed: 11/06/2022]
Abstract
The multidrug resistance (MDR) phenotype is considered as a major cause of the failure in cancer chemotherapy. The acquisition of MDR is usually mediated by the overexpression of drug efflux pumps of a P-glycoprotein. The development of compounds that mitigate the MDR phenotype by modulating the activity of these transport proteins is an important yet elusive target. Here, we screened the saponification and enzymatic degradation products from Salvia hispanica seed's mucilage to discover modulating compounds of the acquired resistance to chemotherapeutic in breast cancer cells. Preparative-scale recycling HPLC was used to purify the hydrolysis degradation products. All compounds were tested in eight different cancer cell lines and Vero cells. All compounds were noncytotoxic at the concentration tested against the drug-sensitive and multidrug-resistant cells (IC50 > 29.2 μM). For the all products, a moderate vinblastine-enhancing activity from 4.55-fold to 6.82-fold was observed. That could be significant from a therapeutic perspective. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Daniel G Rosas-Ramírez
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Mabel Fragoso-Serrano
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Sonia Escandón-Rivera
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
| | - Alba L Vargas-Ramírez
- Unidad de Proteómica Médica, Instituto Nacional de Medicina Genómica, Mexico City, 14610, DF, Mexico
| | - Juan P Reyes-Grajeda
- Unidad de Proteómica Médica, Instituto Nacional de Medicina Genómica, Mexico City, 14610, DF, Mexico
| | - Manuel Soriano-García
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico
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Knutsen HK, Barregård L, Bignami M, Brüschweiler B, Ceccatelli S, Cottrill B, Dinovi M, Edler L, Grasl-Kraupp B, Hogstrand C, Hoogenboom LR, Nebbia CS, Oswald I, Petersen A, Rose M, Roudot AC, Schwerdtle T, Vleminckx C, Vollmer G, Wallace H, Dall'Asta C, Gutleb A, Metzler M, Oswald I, Parent-Massin D, Binaglia M, Steinkellner H, Alexander J. Appropriateness to set a group health based guidance value for T2 and HT2 toxin and its modified forms. EFSA J 2017; 15:e04655. [PMID: 32625252 PMCID: PMC7010130 DOI: 10.2903/j.efsa.2017.4655] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The EFSA Panel on Contaminants in the Food Chain (CONTAM) established a tolerable daily intake (TDI) for T2 and HT2 of 0.02 μg/kg body weight (bw) per day based on a new in vivo subchronic toxicity study in rats that confirmed that immune‐ and haematotoxicity are the critical effects of T2 and using a reduction in total leucocyte count as the critical endpoint. An acute reference dose (ARfD) of 0.3 μg for T2 and HT2/kg bw was established based on acute emetic events in mink. Modified forms of T2 and HT2 identified are phase I metabolites mainly formed through hydrolytic cleavage of one or more of the three ester groups of T2. Less prominent hydroxylation reactions occur predominantly at the side chain. Phase II metabolism involves conjugation with glucose, modified glucose, sulfate, feruloyl and acetyl groups. The few data on occurrence of modified forms indicate that grain products are their main source. The CONTAM Panel found it appropriate to establish a group TDI and a group ARfD for T2 and HT2 and its modified forms. Potency factors relative to T2 for the modified forms were used to account for differences in acute and chronic toxic potencies. It was assumed that conjugates (phase II metabolites of T2, HT2 and their phase I metabolites), which are not toxic per se, would be cleaved releasing their aglycones. These metabolites were assigned the relative potency factors (RPFs) of their respective aglycones. The RPFs assigned to the modified forms were all either 1 or less than 1. The uncertainties associated with the present assessment are considered as high. Using the established group, ARfD and TDI would overestimate any risk of modified T2 and HT2.
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28
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Antitubercular activity of 1,2,3-triazolyl fatty acid derivatives. Eur J Med Chem 2016; 125:842-852. [PMID: 27750201 DOI: 10.1016/j.ejmech.2016.09.086] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/24/2016] [Accepted: 09/26/2016] [Indexed: 12/27/2022]
Abstract
A collection of 1,2,3-triazoles unsaturated fatty acid mimics were efficiently synthesized by click chemistry. The 1,4-disubstituted analogs prepared covered different alkyl chain lengths and triazole positions. The compounds were subsequently tested against Mycobacterium tuberculosis, being most of them active with some of the analogs displaying activity at micromolar concentration. The most potent member of the series has the triazole moiety on the C-2 position with a carbon chain of eight or ten carbon atoms. The 1,5-isomers of the most active analog were significantly less active than the original isomer. The activity of the selected hit was assayed on several clinical MTB multi-drug resistant strains providing the same MIC.
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29
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Vanhoutte I, Audenaert K, De Gelder L. Biodegradation of Mycotoxins: Tales from Known and Unexplored Worlds. Front Microbiol 2016; 7:561. [PMID: 27199907 PMCID: PMC4843849 DOI: 10.3389/fmicb.2016.00561] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/04/2016] [Indexed: 12/24/2022] Open
Abstract
Exposure to mycotoxins, secondary metabolites produced by fungi, may infer serious risks for animal and human health and lead to economic losses. Several approaches to reduce these mycotoxins have been investigated such as chemical removal, physical binding, or microbial degradation. This review focuses on the microbial degradation or transformation of mycotoxins, with specific attention to the actual detoxification mechanisms of the mother compound. Furthermore, based on the similarities in chemical structure between groups of mycotoxins and environmentally recalcitrant compounds, known biodegradation pathways and degrading organisms which hold promise for the degradation of mycotoxins are presented.
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Affiliation(s)
| | | | - Leen De Gelder
- Department of Applied BioSciences, Faculty Bioscience Engineering, Ghent UniversityGhent, Belgium
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30
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Komes D, Belščak-Cvitanović A, Jurić S, Bušić A, Vojvodić A, Durgo K. Consumer acceptability of liquorice root (Glycyrrhiza glabraL.) as an alternative sweetener and correlation with its bioactive content and biological activity. Int J Food Sci Nutr 2015; 67:53-66. [DOI: 10.3109/09637486.2015.1126563] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Shi K, Wang X, Zhu J, Cao G, Zhang K, Su Z. Salidroside protects retinal endothelial cells against hydrogen peroxide-induced injury via modulating oxidative status and apoptosis. Biosci Biotechnol Biochem 2015; 79:1406-13. [PMID: 25921655 DOI: 10.1080/09168451.2015.1038212] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Oxidative stress can cause injury in retinal endothelial cells. Salidroside is a strong antioxidative and cytoprotective supplement in Chinese traditional medicine. In this study, we investigated the effects of salidroside on H2O2-induced primary retinal endothelial cells injury. Salidroside decreased H2O2-induced cell death, and efficiently suppressed cellular ROS production, malondialdehyde generation, and cell apoptosis induced by H2O2 treatment. Salidroside induced the intracellular mRNA expression, protein expression, and enzymatic activities of catalase and Mn-SOD and increased the ratio of Bcl2/Bax. Our results demonstrated that salidroside protected retinal endothelial cells against oxidative injury through increasing the Bcl2/Bax signaling pathway and activation of endogenous antioxidant enzymes. This finding presents salidroside as an attractive agent with potential to attenuate retinopathic diseases.
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Affiliation(s)
- Kai Shi
- a Department of Ophthalmology, West China Hospital , Sichuan University , Chendu , China
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32
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Vulić A, Durgo K, Pleadin J, Herceg L, Kopjar N. Mutagenicity and DNA-damaging potential of clenbuterol and its metabolite 4-amino-3,5-dichlorobenzoic acid in vitro. Food Chem Toxicol 2015; 77:82-92. [DOI: 10.1016/j.fct.2014.12.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/12/2014] [Accepted: 12/31/2014] [Indexed: 11/16/2022]
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Savion N, Izigov N, Morein M, Pri-Chen S, Kotev-Emeth S. S-Allylmercapto-N-acetylcysteine (ASSNAC) protects cultured nerve cells from oxidative stress and attenuates experimental autoimmune encephalomyelitis. Neurosci Lett 2014; 583:108-13. [PMID: 25263785 DOI: 10.1016/j.neulet.2014.09.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 08/12/2014] [Accepted: 09/15/2014] [Indexed: 11/18/2022]
Abstract
Oxidative stress and/or low cellular glutathione are associated with development and progression of neurodegenerative diseases. We have shown that S-allylmercapto-N-acetylcysteine (ASSNAC) up-regulates the level of glutathione and phase II detoxifying enzymes in cultured vascular endothelial cells. The present study demonstrates that exposure of nerve cell lines to ASSNAC significantly increases the cellular level of glutathione probably via activation of nuclear factor erythroid-derived 2-related factor 2 (Nrf2) and protects the cells from tBuOOH-induced cytotoxicity. Furthermore, ASSNAC increases the level of mice spinal cord and brain glutathione (by 54% and 47%, respectively) and attenuates the clinical symptoms of experimental autoimmune encephalomyelitis (EAE) in mice. In conclusion, these data implicate ASSNAC to protect nerve cells, both in vitro and in vivo, from oxidative stress and thereby to attenuate the clinical symptoms of EAE, suggesting its potential use for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Naphtali Savion
- Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer 52621, Israel.
| | - Nira Izigov
- Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer 52621, Israel
| | - Milana Morein
- Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer 52621, Israel
| | - Sarah Pri-Chen
- Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer 52621, Israel
| | - Shlomo Kotev-Emeth
- Goldschleger Eye Research Institute, Sackler Faculty of Medicine, Tel Aviv University, Sheba Medical Center, Tel Hashomer 52621, Israel
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Rodrigues ET, Pardal MÂ. The crab Carcinus maenas as a suitable experimental model in ecotoxicology. ENVIRONMENT INTERNATIONAL 2014; 70:158-182. [PMID: 24934856 DOI: 10.1016/j.envint.2014.05.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 05/23/2014] [Accepted: 05/24/2014] [Indexed: 06/03/2023]
Abstract
Aquatic ecotoxicology broadly focuses on how aquatic organisms interact with pollutants in their environment in order to determine environmental hazard and potential risks to humans. Research has produced increasing evidence on the pivotal role of aquatic invertebrates in the assessment of the impact of pollutants on the environment. Its potential use to replace fish bioassays, which offers ethical advantages, has already been widely studied. Nevertheless, the selection of adequate invertebrate experimental models, appropriate experimental designs and bioassays, as well as the control of potential confounding factors in toxicity testing are of major importance to obtain scientifically valid results. Therefore, the present study reviews more than four decades of published research papers in which the Green crab Carcinus maenas was used as an experimental test organism. In general, the surveyed literature indicates that C. maenas is sensitive to a wide range of aquatic pollutants and that its biological responses are linked to exposure concentrations or doses. Current scientific knowledge regarding the biology and ecology of C. maenas and the extensive studies on toxicology found for the present review recognise the Green crab as a reliable estuarine/marine model for routine testing in ecotoxicology research and environmental quality assessment, especially in what concerns the application of the biomarker approach. Data gathered provide valuable information for the selection of adequate and trustworthy bioassays to be used in C. maenas toxicity testing. Since the final expression of high quality testing is a reliable outcome, the present review recommends gender, size and morphotype separation in C. maenas experimental designs and data evaluation. Moreover, the organisms' nutritional status should be taken into account, especially in long-term studies. Studies should also consider the crabs' resilience when facing historical and concurrent contamination. Finally, experimental temperature and salinity should be harmonised so as to obtain reliable comparisons between different studies. Concerning future reaserch areas, data gathered in the present review reveals that in vitro assays derived from C. maenas are still lacking. Also, a complete C. maenas genome sequencing programme will be essencial for cutting-edge reseach.
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Affiliation(s)
- Elsa Teresa Rodrigues
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
| | - Miguel Ângelo Pardal
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
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Salidroside improves doxorubicin-induced cardiac dysfunction by suppression of excessive oxidative stress and cardiomyocyte apoptosis. J Cardiovasc Pharmacol 2014; 62:512-23. [PMID: 24072175 DOI: 10.1097/fjc.0000000000000009] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Doxorubicin (DOX) is a potent available antitumor drug; however, its clinical use is limited by the cardiotoxicity. Salidroside (SLD), with strong antioxidative and cytoprotective actions, is of particular interest in the development of antioxidative therapies for oxidative injury in cardiac diseases. Now, the protection and underlying mechanisms of SLD against DOX-induced cardiotoxicity are still unknown. In the present study, we revealed both antioxidative mechanism and Bcl2-dependent survival signaling involved in SLD's protection. We observed that DOX exposure induced mortality elevation, body weight loss, and cardiac dysfunction in mice, increased lactate dehydrogenase leakage and cardiomyocyte apoptosis, but decreased cell viability and size in cardiac tissues and cultured H9c2 cells, respectively, which were effectively antagonized by SLD supplement. We further observed that SLD significantly reduced the intercellular oxidative stress level, partly by inhibiting NOX1 expression and augmenting the expression and activities of the endogenous antioxidative enzymes, catalase, and manganese superoxide dismutase. In addition, SLD treatment upregulated the antiapoptotic Bcl2 and downregulated the proapoptotic Bax and inhibited a downstream pathway of Bcl2/Bax and caspase-3 activity. Our results indicated that SLD effectively protected the cardiomyocytes against DOX-induced cardiotoxicity by suppressing the excessive oxidative stress and activating a Bcl2-mediated survival signaling pathway.
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36
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Toxicity of the mycotoxin citrinin and its metabolite dihydrocitrinone and of mixtures of citrinin and ochratoxin A in vitro. Arch Toxicol 2014; 88:1097-107. [PMID: 24577378 DOI: 10.1007/s00204-014-1216-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 02/19/2014] [Indexed: 10/25/2022]
Abstract
Citrinin (CIT) and ochratoxin A (OTA) are mycotoxins produced by several species of the genera Aspergillus, Penicillium and Monascus. Both can be present as contaminants in various food commodities and in animal feed. The occurrence and toxicity of OTA and human exposure have been intensively studied, but for CIT such data are scarce by comparison. Recently, dihydrocitrinone (DH-CIT) was detected as main metabolite of CIT in human urine, and co-occurrence of CIT and OTA was shown in human blood plasma (Blaszkewicz et al. in Arch Toxicol 87:1087-1094, 2013). In light of these new findings, we have now investigated the toxicity of the metabolite DH-CIT in comparison with CIT and analysed the effects of mixtures of CIT and OTA in vitro. The cytotoxic potency of DH-CIT (IC50 of 320/200 μM) was distinctly lower compared with CIT (IC50 of 70/62 μM) after treatment of V79 cells for 24 and 48 h. Whereas CIT induced a concentration-dependent increase in micronucleus frequencies at concentrations ≥30 μM, DH-CIT showed no genotoxic effect up to 300 μM. Thus, conversion of CIT to DH-CIT in humans can be regarded as a detoxification step. Mixtures of CIT and OTA exerted additive effects in cytotoxicity assays. The effect of CIT and OTA mixtures on induction of micronuclei varied dependent on the used concentrations between additive for low μM concentrations and more-than-additive for high μM concentrations. Effects on cell cycle were mostly triggered by OTA when both mycotoxins were used in combination. The implications of our and related in vitro studies are discussed with respect to in vivo concentrations of CIT and OTA, which are found in animals and in humans.
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37
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Porta EOJ, Carvalho PB, Avery MA, Tekwani BL, Labadie GR. Click chemistry decoration of amino sterols as promising strategy to developed new leishmanicidal drugs. Steroids 2014; 79:28-36. [PMID: 24200958 DOI: 10.1016/j.steroids.2013.10.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 10/04/2013] [Accepted: 10/23/2013] [Indexed: 01/15/2023]
Abstract
A series of 1,2,3-triazolylsterols was prepared from pregnenolone through reductive amination and copper(I)-catalyzed azide-alkyne cycloaddition (click chemistry). The newly generated stereocenter of the key propargylamino intermediate provided a mixture of diastereomers which were separated chromatographically, and the configuration of the R isomer was determined by X-ray crystallography. Ten triazolyl sterols were prepared, and the products and intermediates were screened in vitro against different parasites, with some compounds presenting IC50 values in the low micromolar range against Leishmania donovani.
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Affiliation(s)
- Exequiel O J Porta
- Instituto de Química Rosario (IQUIR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | - Paulo B Carvalho
- School of Pharmacy, Notre Dame of Maryland University, Baltimore, MD 21210, USA
| | - Mitchell A Avery
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Babu L Tekwani
- National Center for Natural Products Research & Department of Pharmacology, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Guillermo R Labadie
- Instituto de Química Rosario (IQUIR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina.
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Zhai J, Yong D, Li J, Dong S. A novel colorimetric biosensor for monitoring and detecting acute toxicity in water. Analyst 2013. [DOI: 10.1039/c2an36160d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pieroni M, Girmay S, Sun D, Sahu R, Tekwani BL, Tan GT. Synthesis and structure-activity relationships of lansine analogues as antileishmanial agents. ChemMedChem 2012; 7:1895-900. [PMID: 22987791 PMCID: PMC3565020 DOI: 10.1002/cmdc.201200346] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 07/16/2012] [Indexed: 11/09/2022]
Abstract
Clear and rational thinking: A series of rationally designed, lansine-derived carbazoles was synthesized and evaluated for activity against promastigotes and amastigotes of Leishmania donovani, the causative agent of leishmaniasis. Some structural modifications gave rise to compounds with enhanced activity and selectivity over lansine, allowing structure-activity relationships to be elucidated and providing a foundation for the further development of this pharmacophore.
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Affiliation(s)
- Marco Pieroni
- Tan College of Pharmacy, University of Hawai’i at Hilo Hilo, HI 96720-4029 (USA), Fax: (+1) 808-933-2974
| | - Sisay Girmay
- Tan College of Pharmacy, University of Hawai’i at Hilo Hilo, HI 96720-4029 (USA), Fax: (+1) 808-933-2974
| | - Dianqing Sun
- Tan College of Pharmacy, University of Hawai’i at Hilo Hilo, HI 96720-4029 (USA), Fax: (+1) 808-933-2974
| | - Rajnish Sahu
- National Center for Natural Products Research & Department of Pharmacology, School of Pharmacy, University of Mississippi University, MS 38677-1848 (USA), Fax: (+1) 662-915-7062
| | - Babu L. Tekwani
- National Center for Natural Products Research & Department of Pharmacology, School of Pharmacy, University of Mississippi University, MS 38677-1848 (USA), Fax: (+1) 662-915-7062
| | - Ghee T. Tan
- Tan College of Pharmacy, University of Hawai’i at Hilo Hilo, HI 96720-4029 (USA), Fax: (+1) 808-933-2974
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40
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Ndossi D, Frizzell C, Tremoen N, Fæste C, Verhaegen S, Dahl E, Eriksen G, Sørlie M, Connolly L, Ropstad E. An in vitro investigation of endocrine disrupting effects of trichothecenes deoxynivalenol (DON), T-2 and HT-2 toxins. Toxicol Lett 2012; 214:268-78. [DOI: 10.1016/j.toxlet.2012.09.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 09/05/2012] [Accepted: 09/05/2012] [Indexed: 10/27/2022]
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41
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Weidner M, Welsch T, Hübner F, Schwerdt G, Gekle M, Humpf HU. Identification and apoptotic potential of T-2 toxin metabolites in human cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:5676-5684. [PMID: 22551244 DOI: 10.1021/jf300634k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The mycotoxin T-2 toxin, produced by various Fusarium species, is a widespread contaminant of grain and grain products. Knowledge about its toxicity and metabolism in the human body is crucial for any risk assessment as T-2 toxin can be detected in processed and unprocessed food samples. Cell culture studies using cells of human origin represent a potent model system to study the metabolic fate of T-2 toxin as well as the cytotoxicity in vitro. In this study the metabolism of T-2 toxin was analyzed in a cell line derived from human colon carcinoma cells (HT-29) and primary human renal proximal tubule epithelial cells (RPTEC) using high-performance liquid chromatography coupled with Fourier transformation mass spectrometry (HPLC-FTMS). Both cell types metabolized T-2 toxin to a variety of compounds. Furthermore, cell cycle analysis in RPTEC proved the apoptotic effect of T-2 toxin and its metabolites HT-2 toxin and neosolaniol in micromolar concentrations.
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Affiliation(s)
- Maria Weidner
- Institute of Food Chemistry, Westfälische Wilhelms-Universität Münster, Münster, Germany
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42
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Ferreira T, De Gaspari E. The design of new adjuvants for mucosal immunity to Neisseria meningitidis B in nasally primed neonatal mice for adult immune response. ScientificWorldJournal 2012; 2012:292073. [PMID: 22545012 PMCID: PMC3324212 DOI: 10.1100/2012/292073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 11/30/2011] [Indexed: 02/03/2023] Open
Abstract
The aim of this study was to determine the value of detoxified Shiga toxins Stx1 and Stx2 (toxoids of Escherichia coli) as mucosal adjuvants in neonatal mice for immunogenicity against the outer membrane proteins (OMPs) of Neisseria meningitidis B. Mucosal immunization has been shown to be effective for the induction of antigen-specific immune responses in both the systemic and mucosal compartments. Systemic antibody levels (IgG, IgG1, IgG2a, IgG2b, IgM, and IgA) and mucosal IgM and IgA were measured by ELISA using an N. meningitidis as an antigen. In addition, IFN-γ and IL-6 production were measured after stimulated proliferation of immune cells. Intranasal administration elicited a higher anti-OMP IgA response in both saliva and vaginal fluids. Our results suggest that both Stx1 and Stx2 toxoids are effective mucosal adjuvants for the induction of Ag-specific IgG, IgM, and IgA antibodies. The toxoids significantly enhanced the IgG and IgM response against OMPs with a potency equivalent to CT, with the response being characterized by both IgG1 and IgG2a isotypes, and increased IFN-gamma production. Additionally, bactericidal activity was induced with IgG and IgM antibodies of high avidity. These results support the use of the new toxoids as potent inducing adjuvants that are particularly suitable for mucosal immunization.
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Affiliation(s)
- Tatiane Ferreira
- Immunology Department, Adolfo Lutz Institute, Avenue Dr. Arnaldo 355, 11 andar, 01246-902 São Paulo, SP, Brazil
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Alisi A, Pastore A, Ceccarelli S, Panera N, Gnani D, Bruscalupi G, Massimi M, Tozzi G, Piemonte F, Nobili V. Emodin prevents intrahepatic fat accumulation, inflammation and redox status imbalance during diet-induced hepatosteatosis in rats. Int J Mol Sci 2012; 13:2276-2289. [PMID: 22408453 PMCID: PMC3292022 DOI: 10.3390/ijms13022276] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 02/07/2012] [Accepted: 02/09/2012] [Indexed: 12/14/2022] Open
Abstract
High-fat and/or high-carbohydrate diets may predispose to several metabolic disturbances including liver fatty infiltration (hepatosteatosis) or be associated with necro-inflammation and fibrosis (steatohepatitis). Several studies have emphasized the hepatoprotective effect of some natural agents. In this study, we investigated the potential therapeutic effects of the treatment with emodin, an anthraquinone derivative with anti-oxidant and anti-cancer abilities, in rats developing diet-induced hepatosteatosis and steatohepatitis. Sprague-Dawley rats were fed a standard diet (SD) for 15 weeks, or a high-fat/high-fructose diet (HFD/HF). After 5 weeks, emodin was added to the drinking water of some of the SD and HFD/HF rats. The experiment ended after an additional 10 weeks. Emodin-treated HFD/HF rats were protected from hepatosteatosis and metabolic derangements usually observed in HFD/HF animals. Furthermore, emodin exerted anti-inflammatory activity by inhibiting the HFD/HF-induced increase of tumor necrosis factor (TNF)-α. Emodin also affected the hepatocytes glutathione homeostasis and levels of the HFD/HF-induced increase of glutathionylated/phosphorylated phosphatase and tensin homolog (PTEN). In conclusion, we demonstrated that a natural agent such as emodin can prevent hepatosteatosis, preserving liver from pro-inflammatory and pro-oxidant damage caused by HFD/HF diet. These findings are promising, proposing emodin as a possible hindrance to progression of hepatosteatosis into steatohepatitis.
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Affiliation(s)
- Anna Alisi
- Liver Unit of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (S.C.); (N.P.); (D.G.); (V.N.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-06-68592186; Fax: +39-06-68592904
| | - Anna Pastore
- Laboratory of Biochemistry, of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mail:
| | - Sara Ceccarelli
- Liver Unit of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (S.C.); (N.P.); (D.G.); (V.N.)
| | - Nadia Panera
- Liver Unit of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (S.C.); (N.P.); (D.G.); (V.N.)
| | - Daniela Gnani
- Liver Unit of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (S.C.); (N.P.); (D.G.); (V.N.)
| | - Giovannella Bruscalupi
- Department of Biology and Biotechnology “C. Darwin”, “La Sapienza” University, Rome 00185, Italy; E-Mail:
| | - Mara Massimi
- Department of Basic and Applied Biology, University of L’Aquila, L’Aquila 67010, Italy; E-Mail:
| | - Giulia Tozzi
- Neuromuscular and Neurodegenerative Disease Unit, “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (G.T.); (F.P.)
| | - Fiorella Piemonte
- Neuromuscular and Neurodegenerative Disease Unit, “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (G.T.); (F.P.)
| | - Valerio Nobili
- Liver Unit of “Bambino Gesù” Children’s Hospital, IRCCS, Rome 00165, Italy; E-Mails: (S.C.); (N.P.); (D.G.); (V.N.)
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44
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Alisi A, Bruscalupi G, Pastore A, Petrini S, Panera N, Massimi M, Tozzi G, Leoni S, Piemonte F, Nobili V. Redox homeostasis and posttranslational modifications/activity of phosphatase and tensin homolog in hepatocytes from rats with diet-induced hepatosteatosis. J Nutr Biochem 2012; 23:169-78. [DOI: 10.1016/j.jnutbio.2010.11.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 11/09/2010] [Accepted: 11/16/2010] [Indexed: 02/09/2023]
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45
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Rahman AA, Samoylenko V, Jacob MR, Sahu R, Jain SK, Khan SI, Tekwani BL, Muhammad I. Antiparasitic and antimicrobial indolizidines from the leaves of Prosopis glandulosa var. glandulosa. PLANTA MEDICA 2011; 77:1639-1643. [PMID: 21384317 PMCID: PMC3700807 DOI: 10.1055/s-0030-1270906] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new indolizidine alkaloid, named Δ¹,⁶-juliprosopine (1), together with previously known indolizidine analogs (2- 6), was isolated from the leaves of Prosopis glandulosa var. glandulosa, collected from Nevada, USA; while two other known indolizidines, juliprosopine (6) and juliprosine (7), were isolated from P. glandulosa leaves collected in Texas, USA. The structures of compound 1 and 7 were determined using a combination of NMR and MS techniques. Compound 7 exhibited potent antiplasmodial activity against Plasmodium falciparum D6 and W2 strains with IC (50) values of 170 and 150 ng/mL, respectively, while 1 was found to be less active (IC₅₀ values 560 and 600 ng/mL, respectively). Both compounds were devoid of VERO cells toxicity up to a concentration of 23 800 ng/mL. The antileishmanial activity of indolizidines was evaluated against Leishmania donovani promastigotes, axenic amastigotes, and amastigotes in THP1 macrophage cultures. When tested against macrophage cultures, the tertiary bases (1, 3, 6) were found to be more potent than quaternary salts (2, 5, 7), displaying IC₅₀ values between 0.8-1.7 µg/mL and 3.1-6.0 µg/mL, respectively. In addition, compound 7 showed potent antifungal activity against Cryptococcus neoformans and antibacterial activity against Mycobacterium intracellulare, while 1 was potent only against C. neoformans and weakly active against other organisms.
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Affiliation(s)
- Aziz Abdur Rahman
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Volodymyr Samoylenko
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Melissa R. Jacob
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Rajnish Sahu
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Surendra K Jain
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Babu L. Tekwani
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
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Labadie GR, de la Iglesia A, Morbidoni HR. Targeting tuberculosis through a small focused library of 1,2,3-triazoles. Mol Divers 2011; 15:1017-24. [PMID: 21633789 DOI: 10.1007/s11030-011-9319-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2010] [Accepted: 05/17/2011] [Indexed: 11/24/2022]
Abstract
Looking for new active molecules against Mycobacterium tuberculosis, a small focused library of 1,2,3-triazoles was efficiently prepared by click chemistry. Compounds were subsequently tested against different pathogenic and opportunistic mycobacteria including M. avium and M. tuberculosis. Two of them showed MIC at lower μg/mL concentration for M. avium and even below that for M. tuberculosis, being more potent that control drugs.
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Affiliation(s)
- Guillermo R Labadie
- Instituto de Química Rosario (IQUIR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina.
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47
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Kraus VB, Burnett B, Coindreau J, Cottrell S, Eyre D, Gendreau M, Gardiner J, Garnero P, Hardin J, Henrotin Y, Heinegård D, Ko A, Lohmander LS, Matthews G, Menetski J, Moskowitz R, Persiani S, Poole AR, Rousseau JC, Todman M. Application of biomarkers in the development of drugs intended for the treatment of osteoarthritis. Osteoarthritis Cartilage 2011; 19:515-42. [PMID: 21396468 PMCID: PMC3568396 DOI: 10.1016/j.joca.2010.08.019] [Citation(s) in RCA: 220] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 08/21/2010] [Accepted: 08/28/2010] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Osteoarthritis (OA) is a chronic and slowly progressive disease for which biomarkers may be able to provide a more rapid indication of therapeutic responses to therapy than is currently available; this could accelerate and facilitate OA drug discovery and development programs. The goal of this document is to provide a summary and guide to the application of in vitro (biochemical and other soluble) biomarkers in the development of drugs for OA and to outline and stimulate a research agenda that will further this goal. METHODS The Biomarkers Working Group representing experts in the field of OA biomarker research from both academia and industry developed this consensus document between 2007 and 2009 at the behest of the Osteoarthritis Research Society International Federal Drug Administration initiative (OARSI FDA initiative). RESULTS This document summarizes definitions and classification systems for biomarkers, the current outcome measures used in OA clinical trials, applications and potential utility of biomarkers for development of OA therapeutics, the current state of qualification of OA-related biomarkers, pathways for biomarker qualification, critical needs to advance the use of biomarkers for drug development, recommendations regarding practices and clinical trials, and a research agenda to advance the science of OA-related biomarkers. CONCLUSIONS Although many OA-related biomarkers are currently available they exist in various states of qualification and validation. The biomarkers that are likely to have the earliest beneficial impact on clinical trials fall into two general categories, those that will allow targeting of subjects most likely to either respond and/or progress (prognostic value) within a reasonable and manageable time frame for a clinical study (for instance within 1-2 years for an OA trial), and those that provide early feedback for preclinical decision-making and for trial organizers that a drug is having the desired biochemical effect. As in vitro biomarkers are increasingly investigated in the context of specific drug treatments, advances in the field can be expected that will lead to rapid expansion of the list of available biomarkers with increasing understanding of the molecular processes that they represent.
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Affiliation(s)
- V B Kraus
- Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
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Izigov N, Farzam N, Savion N. S-allylmercapto-N-acetylcysteine up-regulates cellular glutathione and protects vascular endothelial cells from oxidative stress. Free Radic Biol Med 2011; 50:1131-9. [PMID: 21281712 DOI: 10.1016/j.freeradbiomed.2011.01.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 01/10/2011] [Accepted: 01/21/2011] [Indexed: 10/18/2022]
Abstract
Oxidative stress and/or low cellular glutathione (GSH) levels are associated with the development and progression of numerous pathological conditions. Cells possess various antioxidant protection mechanisms, including GSH and phase II detoxifying enzymes. N-acetylcysteine (NAC) supplies cells with cysteine to increase GSH level but its efficacy is relatively low because of its limited tissue penetration. Allicin (diallyl thiosulfinate), a reactive sulfaorganic compound, increases cellular GSH and phase II detoxifying enzymes in vascular endothelial cells (EC). A novel compound was designed: S-allylmercapto-N-acetylcysteine (ASSNAC), a conjugate of S-allyl mercaptan (a component of allicin) and NAC. Both ASSNAC and NAC increased cellular GSH of ECs, reaching a maximum of up to four- and threefold increase after exposure for 24 or 6 h at a concentration of 0.2 or 1 mM, respectively. ASSNAC induced nuclear translocation of the activated transcription factor Nrf2 and expression of phase II detoxifying enzymes. EC exposure to tBuOOH resulted in 75% cytotoxicity, and pretreatment of cultures with 0.2 mM ASSNAC or 2mM NAC reduced cytotoxicity to 20 and 42%, respectively. In conclusion, ASSNAC is superior to NAC in protecting cells from oxidative stress because of its ability to up-regulate both GSH and the expression of phase II detoxifying enzymes.
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Affiliation(s)
- Nira Izigov
- Goldschleger Eye Research Institute, Tel Hashomer 52621, Israel
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49
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Zheljazkov VD, Astatkie T. Effect of distillation waste water and plant hormones on spearmint growth and composition. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1135-1141. [PMID: 21328358 DOI: 10.1002/jsfa.4297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 10/13/2010] [Accepted: 12/17/2010] [Indexed: 05/30/2023]
Abstract
BACKGROUND Distillation waste water (DWW) is a by-product from steam distillation of essential-oil crops; and currently, it is discharged into streams and rivers. The effects of DWW from 13 essential-oil crops, extracts from two alkaloid-containing species, and three plant hormones (methyl jasmonate, MJ; gibberellic acid, GA3; and salicylic acid, SA) were evaluated on productivity, essential-oil content and composition of spearmint (Mentha spicata L.) cv. 'Native'. RESULTS Spearmint plant height was increased by the application of GA3 and Melissa officinalis DWW but suppressed by the application of Rosmarinus officinalis and Tagetes lucida DWW. Generally, MJ, GA3 and M. officinalis and Mentha arvensis DWW increased dry yields. The concentration of L-carvone in the oil ranged from 550 g kg(-1) (with Monarda citriodora DWW) to 670 g kg(-1) (with T. lucida DWW). M. citriodora DWW reduced the concentration of L-carvone in the oil by 23% relative to the control. CONCLUSION Results suggest that DWW from essential-oil crops may affect monoterpene synthesis in M. spicata and, hence, may have a direct effect on the essential oil composition. DWW from essential-oil crops may be used as a growth promoter and modifier of the essential oil composition of spearmint.
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Affiliation(s)
- Valtcho D Zheljazkov
- Mississippi State University, North Mississippi Research and Extension Center, 5421 Highway 145 South, Verona, MS 38879, USA.
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50
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Shah F, Mukherjee P, Gut J, Legac J, Rosenthal PJ, Tekwani BL, Avery MA. Identification of novel malarial cysteine protease inhibitors using structure-based virtual screening of a focused cysteine protease inhibitor library. J Chem Inf Model 2011; 51:852-64. [PMID: 21428453 DOI: 10.1021/ci200029y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Malaria, in particular that caused by Plasmodium falciparum , is prevalent across the tropics, and its medicinal control is limited by widespread drug resistance. Cysteine proteases of P. falciparum , falcipain-2 (FP-2) and falcipain-3 (FP-3), are major hemoglobinases, validated as potential antimalarial drug targets. Structure-based virtual screening of a focused cysteine protease inhibitor library built with soft rather than hard electrophiles was performed against an X-ray crystal structure of FP-2 using the Glide docking program. An enrichment study was performed to select a suitable scoring function and to retrieve potential candidates against FP-2 from a large chemical database. Biological evaluation of 50 selected compounds identified 21 diverse nonpeptidic inhibitors of FP-2 with a hit rate of 42%. Atomic Fukui indices were used to predict the most electrophilic center and its electrophilicity in the identified hits. Comparison of predicted electrophilicity of electrophiles in identified hits with those in known irreversible inhibitors suggested the soft-nature of electrophiles in the selected target compounds. The present study highlights the importance of focused libraries and enrichment studies in structure-based virtual screening. In addition, few compounds were screened against homologous human cysteine proteases for selectivity analysis. Further evaluation of structure-activity relationships around these nonpeptidic scaffolds could help in the development of selective leads for antimalarial chemotherapy.
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Affiliation(s)
- Falgun Shah
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi , University, Mississippi 38677, USA
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