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Shrestha B, You D, Saravia J, Siefker DT, Jaligama S, Lee GI, Sallam AA, Harding JN, Cormier SA. IL-4Rα on dendritic cells in neonates and Th2 immunopathology in respiratory syncytial virus infection. J Leukoc Biol 2017; 102:153-161. [PMID: 28389622 DOI: 10.1189/jlb.4a1216-536r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/24/2017] [Accepted: 03/17/2017] [Indexed: 12/15/2022] Open
Abstract
Respiratory syncytial virus (RSV) is one of the leading causes of bronchiolitis in children, and severe RSV infection early in life has been associated with asthma development. Using a neonatal mouse model, we have shown that down-regulation of IL-4 receptor α (IL-4Rα) with antisense oligonucleotides in the lung during neonatal infection protected from RSV immunopathophysiology. Significant down-regulation of IL-4Rα was observed on pulmonary CD11b+ myeloid dendritic cells (mDCs) suggesting a role for IL-4Rα on mDCs in the immunopathogenesis of neonatal RSV infection. Here, we demonstrated that neonatal CD11b+ mDCs expressed higher levels of IL-4Rα than their adult counterparts. Because CD11b+ mDCs mainly present antigens to CD4+ T cells, we hypothesized that increased expression of IL-4Rα on neonatal CD11b+ mDCs was responsible for Th2 - biased RSV immunopathophysiology. Indeed, when IL-4Rα was selectively deleted from CD11b+ mDCs, the immunopathophysiology typically observed following RSV reinfection was ablated, including Th2 inflammation, airway-mucus hyperproduction, and pulmonary dysfunction. Further, overexpression of IL-4Rα on adult CD11b+ DCs and their adoptive transfer into adult mice was able to recapitulate the Th2-biased RSV immunopathology typically observed only in neonates infected with RSV. IL-4Rα levels on CD11c+ cells were inversely correlated with maturation status of CD11b+ mDCs upon RSV infection. Our data demonstrate that developmentally regulated IL-4Rα expression is critical for the maturity of pulmonary CD11b+ mDCs and the Th2-biased immunopathogenesis of neonatal RSV infection.
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Affiliation(s)
- Bishwas Shrestha
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA.,Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and
| | - Dahui You
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Jordy Saravia
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - David T Siefker
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Sridhar Jaligama
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Greg I Lee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Asmaa A Sallam
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Jeffrey N Harding
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA.,Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and
| | - Stephania A Cormier
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and .,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA.,Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA; and
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Weidemann E, Andersson PL, Bidleman T, Boman C, Carlin DJ, Collina E, Cormier SA, Gouveia-Figueira SC, Gullett BK, Johansson C, Lucas D, Lundin L, Lundstedt S, Marklund S, Nording ML, Ortuño N, Sallam AA, Schmidt FM, Jansson S. 14th congress of combustion by-products and their health effects-origin, fate, and health effects of combustion-related air pollutants in the coming era of bio-based energy sources. Environ Sci Pollut Res Int 2016; 23:8141-8159. [PMID: 26906006 DOI: 10.1007/s11356-016-6308-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 02/15/2016] [Indexed: 06/05/2023]
Abstract
The 14th International Congress on Combustion By-Products and Their Health Effects was held in Umeå, Sweden from June 14th to 17th, 2015. The Congress, mainly sponsored by the National Institute of Environmental Health Sciences Superfund Research Program and the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning, focused on the "Origin, fate and health effects of combustion-related air pollutants in the coming era of bio-based energy sources". The international delegates included academic and government researchers, engineers, scientists, policymakers and representatives of industrial partners. The Congress provided a unique forum for the discussion of scientific advances in this research area since it addressed in combination the health-related issues and the environmental implications of combustion by-products. The scientific outcomes of the Congress included the consensus opinions that: (a) there is a correlation between human exposure to particulate matter and increased cardiac and respiratory morbidity and mortality; (b) because currently available data does not support the assessment of differences in health outcomes between biomass smoke and other particulates in outdoor air, the potential human health and environmental impacts of emerging air-pollution sources must be addressed. Assessment will require the development of new approaches to characterize combustion emissions through advanced sampling and analytical methods. The Congress also concluded the need for better and more sustainable e-waste management and improved policies, usage and disposal methods for materials containing flame retardants.
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Affiliation(s)
- Eva Weidemann
- Department of Chemistry, Umeå University, Umea, Sweden.
| | | | | | - Christoffer Boman
- Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University, Umea, Sweden
| | - Danielle J Carlin
- Department of Health and Human Services, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Elena Collina
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy
| | - Stephania A Cormier
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, USA
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, USA
| | | | - Brian K Gullett
- U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Research Triangle Park, NC, USA
| | - Christer Johansson
- Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
- Environment and Health Administration, Stockholm, Sweden
| | - Donald Lucas
- Lawrence Berkeley National Laboratory, University of California, Berkeley, CA, USA
| | - Lisa Lundin
- Department of Chemistry, Umeå University, Umea, Sweden
| | | | | | | | - Nuria Ortuño
- Chemical Engineering Department, University of Alicante, Alicante, Spain
| | - Asmaa A Sallam
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, USA
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Florian M Schmidt
- Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University, Umea, Sweden
| | - Stina Jansson
- Department of Chemistry, Umeå University, Umea, Sweden
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Hoddle MS, Hoddle CD, Faleiro JR, El-Shafie HAF, Jeske DR, Sallam AA. How Far Can the Red Palm Weevil (Coleoptera: Curculionidae) Fly?: Computerized Flight Mill Studies With Field-Captured Weevils. J Econ Entomol 2015; 108:2599-2609. [PMID: 26470385 DOI: 10.1093/jee/tov240] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 07/19/2015] [Indexed: 06/05/2023]
Abstract
Adult Rhynchophorus ferrugineus (Olivier) captured in pheromone-baited traps in commercial date palm orchards in the Al Ahsaa Directorate, Kingdom of Saudi Arabia, were used in computerized flight mill studies to determine the flight characteristics of this highly invasive and destructive palm pest. Flight mill studies were run at three different time periods, winter (December), spring (March), and summer (May). Of the 192 weevils tethered to flight mills ∼30% failed to fly > 1 km. Of those weevils flying > 1 km (n = 139), 55% flew > 10 km, and of these flyers 5% flew > 50 km in 24 h. Flying weevils exhibited an average weight loss of 20-30% and nonflying control weevils lost ∼9-13% body weight in 24 h. Male and female weevils flying in summer (average laboratory temperature was ∼27°C) flew the longest average distances (∼25-35 km), exhibited highest weight reductions (∼30%), and greatest mortality rates (∼80%). Consequently, time of year not weevil sex or color morph had a consistent and significant effect on flight activity, weight loss, and survivorship rates. Flight activity was predominantly diurnal commencing around 5:00 a.m. and peaking between 9-11:00 a.m. before tapering off. The distribution of flight distances combined across season and sex was mesokurtic (i.e., normally distributed).
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Affiliation(s)
- M S Hoddle
- Department of Entomology, University of California, Riverside, CA 92521. Center for Invasive Species Research, University of California, Riverside, CA 92521.
| | - C D Hoddle
- Department of Entomology, University of California, Riverside, CA 92521
| | - J R Faleiro
- Food and Agriculture Organization of the UN, Date Palm Research Centre, Ministry of Agriculture, PO Box 43, Al-Hassa 31982, Kingdom of Saudi Arabia
| | - H A F El-Shafie
- Date Palm Research Center of Excellence, King Faisal University, P.O. Box 400, Al Ahsaa-31982, Kingdom of Saudi Arabia
| | - D R Jeske
- Department of Statistics, University of California, Riverside, CA 92521
| | - A A Sallam
- Date Palm Research Center of Excellence, King Faisal University, P.O. Box 400, Al Ahsaa-31982, Kingdom of Saudi Arabia
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Abu-Fayyad A, Behery F, Sallam AA, Alqahtani S, Ebrahim H, El Sayed KA, Kaddoumi A, Sylvester PW, Carroll JL, Cardelli JA, Nazzal S. PEGylated γ-tocotrienol isomer of vitamin E: Synthesis, characterization, in vitro cytotoxicity, and oral bioavailability. Eur J Pharm Biopharm 2015; 96:185-95. [PMID: 26235392 DOI: 10.1016/j.ejpb.2015.07.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/14/2015] [Accepted: 07/24/2015] [Indexed: 12/12/2022]
Abstract
Vitamin E refers to a family of eight isomers divided into two subgroups, tocopherols and the therapeutically active tocotrienols (T3). The PEGylated α-tocopherol isomer of vitamin E (vitamin E TPGS) has been extensively investigated for its solubilizing capacity as a nonionic surfactant in various drug delivery systems. Limited information, however, is available about the PEG conjugates of the tocotrienol isomers of vitamin E. In this study two PEGylated γ-T3 variants with mPEG molecular weights of 350 (γ-T3PGS 350) and 1000 (γ-T3PGS 1000) were synthesized by a two-step reaction procedure and characterized by (1)H NMR, HPLC, and mass spectroscopy. The physical properties of their self-assemblies in water were characterized by zeta, CMC, and size analysis. Similar physical properties were found between the PEGylated T3 and vitamin E TPGS. PEGylated T3 were also found to retain the in vitro cytotoxic activity of the free T3 against the MCF-7 and the triple-negative MDA-MB-231 breast cancer cells. PEGylated γ-T3 also increased the oral bioavailability of γ-T3 by threefolds when compared to the bioavailability of γ-T3 formulated into a self-emulsified drug delivery system. No significant differences in biological activity were found between the PEG 350 and 100 conjugates. Results from this study suggest that PEGylation of γ-T3 represents a viable platform for the oral and parenteral delivery of γ-T3 for potential use in the prevention of breast cancer.
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Affiliation(s)
- Ahmed Abu-Fayyad
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Fathy Behery
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Asmaa A Sallam
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Saeed Alqahtani
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Hassan Ebrahim
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Khalid A El Sayed
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Amal Kaddoumi
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Paul W Sylvester
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Jennifer L Carroll
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, USA; Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - James A Cardelli
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA, USA; Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Sami Nazzal
- College of Health and Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA; College of Pharmacy, Taipei Medical University, Taipei, Taiwan.
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Sallam AA, Mohyeldin MM, Foudah AI, Akl MR, Nazzal S, Meyer SA, Liu YY, El Sayed KA. Marine natural products-inspired phenylmethylene hydantoins with potent in vitro and in vivo antitumor activities via suppression of Brk and FAK signaling. Org Biomol Chem 2015; 12:5295-303. [PMID: 24927150 DOI: 10.1039/c4ob00553h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Breast and prostate cancers are among the most common cancers worldwide with devastating statistics for the metastatic, chemotherapy- and radiotherapy-resistant phenotypes. Novel therapies interfering with new and/or multiple pathways involved in the pathology of cancer are urgently needed. Preliminary results showed that the marine natural product Z-4-hydroxyphenylmethylene hydantoin (PMH, ) and its 4-ethylthio-analog (SEth, ) promoted tight junction formation and showed anti-invasive and anti-migratory activities in vitro against metastatic prostate cancer cells and inhibited tumor growth and micrometastases in distant organs in orthotopic and transgenic mice models. This study focuses on the design and synthesis of second-generation PMHs with enhanced antitumor activities. A series of substituted benzaldehydes was selected based on earlier SAR studies and reacted with hydantoin to yield 11 new compounds . Compounds were evaluated for their antiproliferative, antimigratory and anti-invasive properties in vitro against the human mammary and prostate cancer cell lines MDA-MB-231 and PC-3, respectively. A Western blot analysis of the most active analog showed its ability to suppress the expression of the total levels of c-Met and FAK, with subsequent reduction of their phosphorylated (activated) levels in MDA-MB-231 cells. In addition, also inhibited Brk, paxillin and Rac1 phosphorylation. was formulated using hydroxypropyl β-cyclodextrin (HPCD) to improve its solubility and was further evaluated in a nude mice xenograft model using MDA-MB-231/GFP cells. PMH reduced breast tumor growth and suppressed Ki-67, CD31, p-Brk and p-FAK expression in tumor samples. Thus, is a potential lead for the control of invasive breast malignancies.
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Affiliation(s)
- Asmaa A Sallam
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71201, USA.
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6
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Elsayed HE, Akl MR, Ebrahim HY, Sallam AA, Haggag EG, Kamal AM, El Sayed KA. Discovery, optimization, and pharmacophore modeling of oleanolic acid and analogues as breast cancer cell migration and invasion inhibitors through targeting Brk/Paxillin/Rac1 axis. Chem Biol Drug Des 2014; 85:231-43. [PMID: 24954090 DOI: 10.1111/cbdd.12380] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 05/07/2014] [Accepted: 06/07/2014] [Indexed: 01/01/2023]
Abstract
Bioassay-guided fractionation of Terminalia bentzoe L. leaves methanol extract identified the known triterpene oleanolic acid (1) as its major breast cancer cell migration inhibitor. Further chemical optimization afforded five new (9-12 and 15) and seven known (4-8, 13, and 14) semisynthetic analogues. All compounds were tested for their ability to inhibit human breast cancer MDA-MB-231 cells migration, proliferation, and invasion. The results revealed that 3-O-[N-(3'-chlorobenzenesulfonyl)-carbamoyl]-oleanolic acid (11) and 3-O-[N-(5'-fluorobenzenesulfonyl)-carbamoyl]-oleanolic acid (12) were the most active hits at low μM concentration. Western blot analysis indicated the activity of 1, 11, and 12 might be related, at least in part, to the suppression of Brk/Paxillin/Rac1 signaling pathway. Pharmacophore modeling study was conducted to better understand the common structural binding epitopes important for the antimigratory activity. The sulfonyl carbamoyl moiety with an optimal bulkiness electron-deficient phenyl ring is associated with improved activity. This study is the first to discover the antimigratory and anti-invasive activities of oleanolic acid and analogues through targeting the Brk/Paxillin/Rac1 axis.
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Affiliation(s)
- Heba E Elsayed
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, 71201, USA; Department of Pharmacognosy, Faculty of Pharmacy, Helwan University, Helwan, Cairo, 11795, Egypt
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Foudah AI, Sallam AA, Akl MR, El Sayed KA. Optimization, pharmacophore modeling and 3D-QSAR studies of sipholanes as breast cancer migration and proliferation inhibitors. Eur J Med Chem 2013; 73:310-24. [PMID: 24487236 DOI: 10.1016/j.ejmech.2013.11.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 11/21/2013] [Accepted: 11/24/2013] [Indexed: 01/11/2023]
Abstract
Sipholenol A, a triterpene isolated from the Red Sea sponge Callyspongia siphonella, was previously shown to reverse multidrug resistance in P-glycoprotein-overexpressing cancer cells. Moreover, sipholanes showed promising in vitro inhibitory effects against the invasion and migration of the metastatic human breast cancer cell line MDA-MB-231. The breast tumor kinase (Brk), a mediator of cancer cell phenotypes important for proliferation, survival, and migration, was proposed as a potential target. This study reports additional semisynthetic optimization of sipholenol A esters to improve the breast cancer antimigratory and antiproliferative activities as well as Brk phosphorylation inhibition. Fifteen new sipholenol A analogs (25-39) were semisynthesized. Sipholenol A 4β-4',5'-dichlorobenzoate ester (29) was the most potent, with an IC50 value of 1.3 μM in the migration assay. The level of Brk phosphorylation inhibition of 29 was assessed using the Z'-LYTE™ kinase assay and Western blot analysis. Active analogs showed no toxicity on the non-tumorigenic epithelial breast cell line MCF10A at doses equal to their IC50 values or higher in migration and proliferation assays, suggesting their selectivity towards malignant cells. Pharmacophore modeling and 3D-QSAR studies were conducted to identify important pharmacophoric features and correlate 3D-chemical structure with activity. These studies provided the evidence for future design of novel antimigratory compounds based on a simplified sipholane structure possessing rings A and B (perhydrobenzoxepine) connected to substituted aromatic esters, with the elimination of rings C and D ([5,3,0]bicyclodecane system). This will enable the future synthesis of the new active entities feasibly and cost-effectively. These results demonstrate the potential of marine natural products for the discovery of novel scaffolds for the control and management of metastatic breast cancer.
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Affiliation(s)
- Ahmed I Foudah
- Department of Basic Pharmaceutical Sciences of College of Pharmacy, University of Louisiana at Monroe, USA
| | - Asmaa A Sallam
- Department of Basic Pharmaceutical Sciences of College of Pharmacy, University of Louisiana at Monroe, USA
| | - Mohamed R Akl
- Department of Basic Pharmaceutical Sciences of College of Pharmacy, University of Louisiana at Monroe, USA
| | - Khalid A El Sayed
- Department of Basic Pharmaceutical Sciences of College of Pharmacy, University of Louisiana at Monroe, USA.
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Sallam AA, Ayoub NM, Foudah AI, Gissendanner CR, Meyer SA, El Sayed KA. Indole diterpene alkaloids as novel inhibitors of the Wnt/β-catenin pathway in breast cancer cells. Eur J Med Chem 2013; 70:594-606. [PMID: 24211635 PMCID: PMC3884952 DOI: 10.1016/j.ejmech.2013.09.045] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 09/24/2013] [Accepted: 09/28/2013] [Indexed: 10/26/2022]
Abstract
Penitrems are indole diterpene alkaloids best known for their BK channel inhibition and tremorgenic effects in mammals. In a previous study, penitrems A-F (1-5), their biosynthetic precursors, paspaline (6) and emindole SB (7), and two brominated penitrem analogs 8 and 9 demonstrated promising in vitro antiproliferative, antimigratory, and anti-invasive effects in the MTT (MCF-7 and MDA-MB-231), wound-healing, and Cultrex BME cell invasion (MDA-MB-231) assays, respectively. The study herein reports the novel ability of penitrem A to suppress total β-catenin levels in MDA-MB-231 mammary cancer cells. Nine new penitrem analogs (10-18) were semisynthetically prepared, in an attempt to identify pharmacophores correlated with BK channel inhibition and tremorgenicity of penitrems and decrease their toxicity. The degree of BK channel inhibition was assessed using the nematode Caenorhabditis elegans, and in vivo tremorgenic EC₅₀ was calculated using CD-1 male mice following an Up-and-Down Procedure (UDP). Although new analogs were generally less active than parent compound 1, some showed no BK channel inhibition or tremorgenicity and retained the ability of penitrem A (1) to suppress total β-catenin levels in MDA-MB-231 cells. Paspaline (6) and emindole SB (7), both lacking BK channel inhibition and tremorgenicity, represent the simplest indole diterpene skeleton that retains the antiproliferative, antimigratory and total β-catenin suppressing effects shown by the more complex penitrem A (1).
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Affiliation(s)
- Asmaa A. Sallam
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, USA
| | - Nehad M. Ayoub
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, USA
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Ahmed I. Foudah
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, USA
| | - Chris R. Gissendanner
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, USA
| | - Sharon A. Meyer
- Department of Toxicology, College of Pharmacy, University of Louisiana at Monroe, USA
| | - Khalid A. El Sayed
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, USA
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9
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Sallam AA, Houssen WE, Gissendanner CR, Orabi KY, Foudah AI, El Sayed KA. Bioguided discovery and pharmacophore modeling of the mycotoxic indole diterpene alkaloids penitrems as breast cancer proliferation, migration, and invasion inhibitors. Medchemcomm 2013; 4:10.1039/C3MD00198A. [PMID: 24273638 PMCID: PMC3835464 DOI: 10.1039/c3md00198a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Marine-derived fungi have proven to be important sources of bioactive natural organohalides. The genus Penicillium is recognized as a rich source of chemically diverse bioactive secondary metabolites. This study reports the fermentation, isolation and identification of a marine-derived Penicillium species. Bioassay-guided fractionation afforded the indole diterpene alkaloids penitrems A, B, D, E and F as well as paspaline and emnidole SB (1-7). Supplementing the fermentation broth of the growing fungus with KBr afforded the new 6-bromopenitrem B (8) and the known 6-bromopenitrem E (9). These compounds showed good antiproliferative, antimigratory and anti-invasive properties against human breast cancer cells. Penitrem B also showed a good activity profile in the NCI-60 DTP human tumor cell line screen. The nematode Caenorhabditis elegans was used to assess the BK channel inhibitory activity and toxicity of select compounds. A pharmacophore model was generated to explain the structural relationships of 1-9 with respect to their antiproliferative activity against the breast cancer MCF-7 cells. The structurally less complex biosynthetic precursors, paspaline (6) and emindole SB (7), were identified as potential hits suitable for future studies.
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Affiliation(s)
- Asmaa A. Sallam
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71201 USA
| | - Wael E. Houssen
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen, AB24 3UE Scotland, UK
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, Scotland, UK
| | - Chris R. Gissendanner
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71201 USA
| | - Khaled Y. Orabi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Health Sciences Center, Kuwait University, Safat 13110, Kuwait
| | - Ahmed I. Foudah
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71201 USA
| | - Khalid A. El Sayed
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana 71201 USA
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Behery FA, Sallam AA, El Sayed KA. Mannich- and Lederer–Manasse-based analogues of the natural product S-(+)-curcuphenol as cancer proliferation and migration inhibitors. Med Chem Commun 2012. [DOI: 10.1039/c2md20185b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hassan HM, Sallam AA, Mohammed R, Hifnawy MS, Youssef DTA, El Sayed KA. Semisynthetic analogues of the marine cembranoid sarcophine as prostate and breast cancer migration inhibitors. Bioorg Med Chem 2011; 19:4928-34. [PMID: 21775154 DOI: 10.1016/j.bmc.2011.06.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 06/15/2011] [Accepted: 06/21/2011] [Indexed: 11/28/2022]
Abstract
Sarcophine (1) is a bioactive cembranoid diterpene isolated from the Red Sea soft coral Sarcophyton glaucum. Previous semisynthesis attempts resulted in decreased or complete loss of 1's anticancer activity. Sarcophine and analogues showed antimigratory activity against breast and prostate cancer cell lines. This encouraged further semisynthestic optimizations to improve its activity and establish a preliminary structure-activity relationship. Eight new and five known semisynthetic analogues were generated. These compounds were evaluated for their ability to inhibit growth, proliferation, and migration of the prostate and breast metastatic cancer cell lines PC-3 and MDA-MB-231, respectively. Most analogues exhibited enhanced antimigratory activity.
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Affiliation(s)
- Hossam M Hassan
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71201, USA
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Hassan HM, Elnagar AY, Khanfar MA, Sallam AA, Mohammed R, Shaala LA, Youssef DT, Hifnawy MS, El Sayed KA. Design of semisynthetic analogues and 3D-QSAR study of eunicellin-based diterpenoids as prostate cancer migration and invasion inhibitors. Eur J Med Chem 2011; 46:1122-30. [DOI: 10.1016/j.ejmech.2011.01.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2010] [Revised: 01/08/2011] [Accepted: 01/14/2011] [Indexed: 10/18/2022]
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Sallam AA, Ramasahayam S, Meyer SA, El Sayed KA. Design, synthesis, and biological evaluation of dibromotyrosine analogues inspired by marine natural products as inhibitors of human prostate cancer proliferation, invasion, and migration. Bioorg Med Chem 2010; 18:7446-57. [PMID: 20884214 DOI: 10.1016/j.bmc.2010.08.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 08/24/2010] [Accepted: 08/30/2010] [Indexed: 11/17/2022]
Abstract
Bioactive secondary metabolites originating from dibromotyrosine are common in marine sponges, such as sponges of the Aplysina species. Verongiaquinol (1), 3,5-dibromo-1-hydroxy-4-oxocyclohexa-2,5-diene-1-acetamide, and aeroplysinin-1 are examples of such bioactive metabolites. Previous studies have shown the potent antimicrobial as well as cytotoxic properties of verongiaquinol and the anti-angiogenic activity of aeroplysinin-1. The work presented herein shows the design and synthesis of dibromotyrosine-inspired phenolic ester and ether analogues with anti-angiogenic, anti-proliferative and anti-migratory properties and negligible cytotoxicity. Several analogues were synthesized based on docking experiments in the ATP binding site of VEGFR2 and their anti-angiogenic potential and ability to inhibit angiogenesis and prostate cancer proliferation, migration and invasion were evaluated using the chick chorioallantoic membrane (CAM) assay, MTT, wound-healing, and Cultrex® BME cell invasion assay models, respectively. Analogues with high docking scores showed promising anti-angiogenic activity in the CAM assay. In general, ester analogues (5, 6, and 8-10) proved to be of higher anti-migratory activity whereas ether analogues (11-14) showed better anti-proliferative activity. These results demonstrate the potential of dibromotyrosines as promising inhibitory scaffolds for the control of metastatic prostate cancer proliferation and migration.
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Affiliation(s)
- Asmaa A Sallam
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, 1800 Bienville Drive, Monroe, LA 71201, USA
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Abstract
An analysis of birth weight was undertaken on secondary data derived from the Malaysian Family Life Survey II. A total of 1629 last singleton live birth infants was analysed with the aim of identifying from the variables available potential risk factors for low birth weight. Univariate and subsequently multivariate analyses were carried out for this purpose. The incidence of low birth weight was 11.8 percent. Race, parity and prematurity were found to be significantly associated with low birth weight after controlling of the other variables. The findings indicate that more work needs to be done to establish the underlying reasons for low birth weight in Malaysia.
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Affiliation(s)
- A B Mahmud
- Dept of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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