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Zhang T, Bandero V, Corcoran C, Obaidi I, Ruether M, O'Brien J, O'Driscoll L, Frankish N, Sheridan H. Design, synthesis and biological evaluation of a novel bioactive indane scaffold 2-(diphenylmethylene)c-2,3-dihydro-1H-inden-1-one with potential anticancer activity. Eur J Pharm Sci 2023; 188:106529. [PMID: 37459901 DOI: 10.1016/j.ejps.2023.106529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/23/2023] [Accepted: 07/14/2023] [Indexed: 07/23/2023]
Abstract
Over the past decades, designing of privileged structures has emerged as a useful approach to the discovery and optimisation of novel biologically active molecules, and many have been successfully exploited across and within different target families. Examples include indole, quinolone, isoquinoline, benzofuran and chromone, etc. In the current study, we focus on synthesising a novel hybrid scaffold constituting naturally occurring benzophenone (14) and indanone (22) ring systems, leading to a general structure of 2-(diphenylmethylene)-2,3-dihydro-1H-inden-1-one (23). It was hypothesised this new hybrid system would provide enhanced anti-cancer activity owing to the presence of the common features associated with the tubulin binding small molecule indanocine (10) and the estrogen receptor (ER) antagonist tamoxifen (24). Key hybrid molecules were successfully synthesised and characterised, and the in vitro cytotoxicity assays were performed against cancer cell lines: MCF7 (breast) and SKBR3 (breast), DU145 (prostate) and A549 (lung). The methyl-, chloro- and methoxy-, para-substituted benzophenone hybrids displayed the greatest degree of cytotoxicity and the E-configuration derivatives 45, 47 and 49 being significantly most potent. We further verified that the second benzyl moiety of this novel hybrid scaffold is fundamental to enhance the cytotoxicity, especially in the SKBR3 (HER2+) by the E-methyl lead molecule 47, MCF7 (ER+) by 45 and 49, and A549 (NSCLC) cell lines by 49. These hybrid molecules also showed a significant accumulation of SKBR3 cells at S-phase of the cell cycle after 72 hrs, which demonstrates besides of being cytotoxic in vitro against SKBR3 cells, 47 disturbs the replication and development of this type of cancer causing a dose-dependent cell cycle arrest at S-phase. Our results suggest that DNA damage might be involved in the induction of SKBR3 cell death caused by the hybrid molecules, and therefore, this novel system may be an effective suppressor of HER2+/Neu-driven cancer growth and progression. The present study points to potential structural optimisation of the series and encourages further focussed investigation of analogues of this scaffold series toward their applications in cancer chemoprevention or chemotherapy.
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Affiliation(s)
- Tao Zhang
- School of Food Science and Environmental Health, Technological University Dublin, Grangegorman, Dublin 7, D07 ADY7, Ireland; The Trinity Centre for Natural Products Research (NatPro), School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, D02 PN40, Ireland; Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
| | - Vilmar Bandero
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
| | - Claire Corcoran
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
| | - Ismael Obaidi
- The Trinity Centre for Natural Products Research (NatPro), School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, D02 PN40, Ireland; College of Pharmacy, University of Babylon, Babylon, Iraq.
| | - Manuel Ruether
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
| | - John O'Brien
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
| | - Lorraine O'Driscoll
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
| | - Neil Frankish
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
| | - Helen Sheridan
- The Trinity Centre for Natural Products Research (NatPro), School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, D02 PN40, Ireland; Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, D02 PN40, Ireland.
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Chan K, Frankish N, Zhang T, Ece A, Cannon A, O'Sullivan J, Sheridan H. Bioactive indanes: insight into the bioactivity of indane dimers related to the lead anti-inflammatory molecule PH46A. J Pharm Pharmacol 2020; 72:927-937. [PMID: 32301120 PMCID: PMC7497186 DOI: 10.1111/jphp.13269] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 03/14/2020] [Indexed: 12/30/2022]
Abstract
Objectives PH46A (1) demonstrates significant anti-inflammatory activity in phenotypic models but its mechanism and site of action have been elusive. Current study focused on the bioactivity of PH46 (2) and related novel indane dimers (6-10) to investigate the impact of changes in substitution and stereochemistry at the C-1 and C-2 positions of the PH46 (2) scaffold. Methods Cytotoxicity profiles of compounds were established using THP-1 macrophages and SW480 cells. Effects of the compounds were then evaluated at 10 µm using 5-lipoxygenase (LOX) and 15-LOX enzymes, and 5-LOX binding was evaluated in silico against NDGA, nitric oxide (NO) released from LPS-induced SW480 cells and cytokines in THP-1 macrophages (IL-6, IL-1β, TNF-α and IFN-γ) and in SW480 cells (IL-8). Key findings PH46 (2) and 7 cause reduction in NO, inhibition of 5-LOX with high binding energy and no cytotoxicity effects in THP-1 macrophages and SW480 cell lines (up to 50 µm). The cytokine profiling of the series demonstrated inhibition of IL-6 and TNF-α in THP-1 macrophages together with IL-8 in SW480 cells. Conclusions The observed profile of cytokine modulation (IL-6/ TNF-α, IL-8) and inhibition of release of NO and 5-LOX may contribute to the in vivo effects demonstrated by indane dimers and PH46A (1) in murine models of colitis.
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Affiliation(s)
- Kit Chan
- School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, Dublin 2, Ireland
| | - Neil Frankish
- School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, Dublin 2, Ireland
| | - Tao Zhang
- School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, Dublin 2, Ireland.,School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland
| | - Abdulilah Ece
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Biruni University, Topkapi-Istanbul, Turkey
| | - Aoife Cannon
- Department of Surgery, School of Medicine, Trinity Translation Medicine Institute (TTMI), St James's Hospital, Dublin 8, Ireland
| | - Jacintha O'Sullivan
- Department of Surgery, School of Medicine, Trinity Translation Medicine Institute (TTMI), St James's Hospital, Dublin 8, Ireland
| | - Helen Sheridan
- School of Pharmacy and Pharmaceutical Sciences and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, Dublin 2, Ireland
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Scalabrino GA, Zhang T, Frankish N, Sheridan H. Bioactive indanes: Development and validation of an LC-MS/MS bioanalytical method for the determination of PH46A, a new potential anti-inflammatory agent, in dog and rat plasma and its application to a pharmacokinetic study in dog. J Pharm Biomed Anal 2020; 179:113011. [PMID: 31835124 PMCID: PMC6983930 DOI: 10.1016/j.jpba.2019.113011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 11/22/2019] [Accepted: 11/24/2019] [Indexed: 11/18/2022]
Abstract
Selective and sensitive determination by LC—MS/MS of PH46A, a new class of antiinflammation agent, in preclinical animal plasma. Full development and validation of the LC—MS/MS method in two preclinical species. A pharmacokinetic study of PH46A in dog using the method developed.
A new chemical entity, which is a chiral indane dimer, PH46A, has been developed by our research group. As a clinical candidate. PH46A has recently completed Phase I clinical studies in man. Previously, during its pre-clinical development, in in vivo pre-clinical studies PH46A showed potent anti-inflammatory properties, which can be targeted at a range of diseases, including inflammatory bowel disease (IBD). To support the pre-clinical development of this drug candidate, we developed a LC—MS/MS method for determining PH46 (the acid form of PH46A salt) in both dog and rat plasma using Compound 1 as internal standard (IS). Those species were selected for safety pharmacology and toxicology, as well as pharmacokinetics studies. The method was validated over the range 10−10000 ng/mL for both matrices and the linearity, accuracy, precision and specificity over this range were demonstrated to be acceptable. No significant matrix effects or carryover were observed for both PH46 and IS and recovery was consistent. PH46 was found to be stable in both dog and rat plasma under the test conditions, such as at room temperature for >24 h, through 3 freeze/thaw cycles, and at -20 °C for >1 month. PH46 and IS in dog and rat plasma extracts were also found to be stable in the autosampler against fresh standard extracts on re-injection after 143.5 h and 243.5 h, respectively at 4 °C. 10- and 100-fold dilutions with control matrix were found not to affect the performance of the assay. This method was successfully applied to a pharmacokinetic study in the dog. With the exception of one dog, 003 M, oral administration of PH46A in gelatine capsules was well tolerated at a dose level of 100 mg/kg. The highest Cmax was observed in animal 003 M. The rapid absorption and high plasma concentration observed for animal 003 M compared to the data for animals 001 M and 002 M may account for the sickness observed in this animal; however, the reasons for this have not been investigated.
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Affiliation(s)
- Gaia A Scalabrino
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland
| | - Tao Zhang
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland; School of Food Science and Environmental Health, City Campus, Technological University Dublin, Dublin 1, Ireland
| | - Neil Frankish
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland; Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland.
| | - Helen Sheridan
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland; Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland.
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Cumming GR, Zhang T, Scalabrino G, Frankish N, Sheridan H. Investigation of the Stereoselective Synthesis of the Indane Dimer PH46A, a New Potential Anti-inflammatory Agent. Org Process Res Dev 2017; 21:1972-1979. [PMID: 29472755 PMCID: PMC5814955 DOI: 10.1021/acs.oprd.7b00258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Indexed: 11/28/2022]
Abstract
PH46A, belonging to a class of 1,2-Indane dimers, has been developed by our research group as a potential therapeutic agent for the treatment of inflammatory and autoimmune diseases. The initial synthetic route to PH46A gave a low overall yield, due in large part to the generation of undesired diastereoisomer 5 and the unwanted enantiomer (R,R)-8 during the synthesis. The aim of this work was to carry out a comprehensive investigation into the stereoselective synthesis of PH46A. Significant progress was made on the ketone reduction step, where the use of triisobutylaluminum [TiBA, Al(iBu)3] afforded high selectivity for the target diastereoisomer (rac)-6, compared to the unfavorable ratio obtained using a previous process. This enabled a multikilo scale synthesis of PH46A in a GMP environment. Further, a brief proof-of-principle investigation was carried out using an achiral phase transfer catalyst (PTC) for alkylation at the methine carbon of the parent indanone.
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Affiliation(s)
| | - Tao Zhang
- Trino Therapeutics Ltd, The Tower, Trinity Technology & Enterprise Campus, Dublin 2, Ireland
| | - Gaia Scalabrino
- Trino Therapeutics Ltd, The Tower, Trinity Technology & Enterprise Campus, Dublin 2, Ireland
| | - Neil Frankish
- Trino Therapeutics Ltd, The Tower, Trinity Technology & Enterprise Campus, Dublin 2, Ireland.,Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute (TBSI), Trinity College, Dublin 2, Ireland
| | - Helen Sheridan
- Trino Therapeutics Ltd, The Tower, Trinity Technology & Enterprise Campus, Dublin 2, Ireland.,Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute (TBSI), Trinity College, Dublin 2, Ireland
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Nazir I, Ur Rahman N, Alvi Z, Hafizur Rahman M, Sendker J, Zhang T, Frankish N, Sheridan H. Erratum: Antidiabetic Activities of an LC/MS Fingerprinted Aqueous Extract of Fagonia cretica L. in Preclinical Models. Planta Med 2017; 83:E3. [PMID: 28476067 DOI: 10.1055/s-0043-109620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Imran Nazir
- Department of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Nisar Ur Rahman
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Zunaira Alvi
- Department of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - M Hafizur Rahman
- Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi, Pakistan
| | - Jandirk Sendker
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Münster, Germany
| | - Tao Zhang
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Neil Frankish
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Helen Sheridan
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
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Nazir I, Ur Rahman N, Alvi Z, Hafizur Rahman M, Sendker J, Zhang T, Frankish N, Sheridan H. Antidiabetic Activities of an LC/MS Fingerprinted Aqueous Extract of Fagonia cretica L. in Preclinical Models. Planta Med 2017; 83:1141-1148. [PMID: 28388787 DOI: 10.1055/s-0043-107616] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Diabetes mellitus is a chronic disease and one of the most important public health challenges facing mankind. Fagonia cretica is a medicinal plant used widely in the Punjab in Pakistan. A recent survey has demonstrated that traditional healers and herbalists frequently use this plant to treat diabetes. In the current study, the traditional medicine was prepared as a tea, and the profile of the main metabolites present in the traditional medicine was analysed via LC/MS/MS. The extract was shown to contain a number of phenolic glycosides including quercetin-3-O-rutinoside, kaempferol-3-O-rutinoside, kaempferol-3-O-glycoside, kaempferol-3(6'-malonylglucoside), isorhamnetin-3-O-rutinoside, and isorhamnetin 3-(6″-malonylglucoside) in addition to two unidentified sulphonated saponins. The traditional medicine inhibits α-glucosidase in vitro with an IC50 of 4.62 µg/mL. The hypoglycaemic effect of the traditional medicine was evaluated in normoglycaemic and streptozotocin-treated diabetic rats, using glibenclamide as an internal control. The preparation (250 or 500 mg/kg body weight) was administered once a day for 21 consecutive days. The dose of 500 mg/kg was effective in the management of the disease, causing a 45 % decrease in the plasma glucose level at the end of the experimental period. Histological analysis of pancreatic sections confirmed that streptozotocin/nictotinamide treatment caused destruction of pancreatic islet cells, while pancreatic sections from the treatment groups showed that both the extract and glibenclamide partially prevented this deterioration. The mechanism of this protective effect is unclear. However, such a finding suggests that ingestion of the tea could confer additional benefits and should be investigated further.
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Affiliation(s)
- Imran Nazir
- Department of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Nisar Ur Rahman
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Zunaira Alvi
- Department of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - M Hafizur Rahman
- Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi, Pakistan
| | - Jandirk Sendker
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Münster, Germany
| | - Tao Zhang
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Neil Frankish
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
| | - Helen Sheridan
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences and Trinity Biosciences Institute (TBSI), Dublin, Ireland
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Zhang T, Paluch K, Scalabrino G, Frankish N, Healy AM, Sheridan H. Molecular structure studies of (1 S,2 S)-2-benzyl-2,3-dihydro-2-(1H-inden-2-yl)-1H-inden-1-ol. J Mol Struct 2015; 1083:286-299. [PMID: 25750458 PMCID: PMC4308634 DOI: 10.1016/j.molstruc.2014.12.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 12/03/2014] [Accepted: 12/03/2014] [Indexed: 11/30/2022]
Abstract
Chemical separation is used for racemate resolution. NMR analyses are used for single enantiomer structure education. Intermolecular interactions are observed by X-ray study.
The single enantiomer (1S,2S)-2-benzyl-2,3-dihydro-2-(1H-inden-2-yl)-1H-inden-1-ol (2), has recently been synthesized and isolated from its corresponding diastereoisomer (1). The molecular and crystal structures of this novel compound have been fully analyzed. The relative and absolute configurations have been determined by using a combination of analytical tools including X-ray crystallography, X-ray Powder Diffraction (XRPD) analysis and Nuclear Magnetic Resonance (NMR) spectroscopy.
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Affiliation(s)
- Tao Zhang
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland ; Novel Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
| | - Krzysztof Paluch
- Centre for Pharmaceutical Engineering Science, Bradford School of Pharmacy, Faculty of Life Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, UK
| | - Gaia Scalabrino
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland
| | - Neil Frankish
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland ; Novel Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
| | - Anne-Marie Healy
- Novel Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
| | - Helen Sheridan
- Trino Therapeutics Ltd, The Tower, Trinity Technology and Enterprise Campus, Dublin 2, Ireland ; Novel Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
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Zhang T, Bandero V, McCabe T, Frankish N, Sheridan H. 2-(Di-phenyl-methyl-idene)-2,3-di-hydro-1H-inden-1-one. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1306-o1307. [PMID: 24109382 PMCID: PMC3793795 DOI: 10.1107/s1600536813018990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 07/09/2013] [Indexed: 06/02/2023]
Abstract
In the title mol-ecule, C22H16O, the indanone ring system is approximately planar with a dihedral angle between the fused rings of 5.13 (14)°. Two benzene rings are linked together at one side of a double bond, sitting on either side of the indanone ring system and making dihedral angles of 70.30 (12) and 44.74 (13)° with it. In the crystal, hydrogen bonding is not present, but weak C-H⋯π or π-π inter-actions occur and mol-ecules form a sheet-like structure in the bc plane.
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Affiliation(s)
- Tao Zhang
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Vilmar Bandero
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Tom McCabe
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland
| | - Neil Frankish
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Helen Sheridan
- Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
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Frampton CS, Zhang T, Scalabrino GA, Frankish N, Sheridan H. (1S)-1-Phenylethanaminium 4-{[(1S,2S)-1-hydroxy-2,3-dihydro-1H,1'H-[2,2'-biinden]-2-yl]methyl}benzoate. Acta Crystallogr C 2012; 68:o323-6. [PMID: 22850861 DOI: 10.1107/s0108270112031265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 07/09/2012] [Indexed: 11/10/2022] Open
Abstract
The title molecular salt, C(8)H(12)N(+)·C(26)H(21)O(3)(-), contains a dimeric indane pharmacophore that demonstrates potent anti-inflammatory activity. The indane group of the anion exhibits some disorder about the α-C atom, which appears common to many structures containing this group. A model to account for the slight disorder was attempted, but this was deemed unsuccessful because applying bond-length constraints to all the bonds about the α-C atom led to instability in the refinement. The absolute configuration was determined crystallographically as S,S,S by anomalous dispersion methods with reference to both the Flack parameter and Bayesian statistics on Bijvoet differences. The configuration was also determined by an a priori knowledge of the absolute configuration of the (1S)-1-phenylethanaminium counter-ion. The molecules pack in the crystal structure to form an infinite two-dimensional hydrogen-bond network in the (100) plane of the unit cell.
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Frankish N, Sheridan H. 6-(methylamino)hexane-1,2,3,4,5-pentanol 4-(((1S,2S)-1-hydroxy-2,3-dihydro-1H,1'H-[2,2-biinden]-2-yl)methyl)benzoate (PH46A): a novel small molecule with efficacy in murine models of colitis. J Med Chem 2012; 55:5497-505. [PMID: 22663546 DOI: 10.1021/jm300390f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The indane skeleton is found naturally and in several therapeutic molecules in medicinal chemistry. During our work on the anti-inflammatory activity of naturally occurring and synthetic indanes, we have synthesized a novel indane scaffold that has been optimized for both anti-inflammatory activity and bioavailability. We have evaluated our lead molecule, PH46A, in in vivo models of inflammatory bowel disease (IBD), an area of considerable unmet clinical need; current therapies are often unable to control the course of the disease. The compound significantly reduced histological damage and serum amyloid A (SAA) levels in IL-10(-/-) colitis mice, was efficacious in the 5% dextran sulfate sodium (DSS) colitis model, and compared favorably with prednisolone in this model and supports its potential use to treat acute exacerbations of the disease. Further, the graded response to the compound may also lend itself to be used at a lower dose to maintain periods of remission.
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Affiliation(s)
- Neil Frankish
- Trinity College Dublin, Drug Discovery Group, School of Pharmacy and Pharmaceutical Sciences, College Green, Dublin 2, Ireland.
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Zhang T, McCabe T, Marzec B, Frankish N, Sheridan H. N-Cyclo-pentyl-N-(3-oxo-2,3-dihydro-1H-inden-1-yl)acetamide. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o958. [PMID: 22590018 PMCID: PMC3343937 DOI: 10.1107/s160053681200606x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 02/10/2012] [Indexed: 05/26/2023]
Abstract
The title mol-ecule, C(16)H(19)NO(2), consists of an indane moiety, which is connected through an N atom to an acetamide group and a cyclo-pentane ring. The N atom adopts planar triangular geometry. Inter-molecular inter-actions, such as π-π stacking or hydrogen bonding, were not observed.
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Frankish N, de Sousa Menezes F, Mills C, Sheridan H. Enhancement of insulin release from the beta-cell line INS-1 by an ethanolic extract of Bauhinia variegata and its major constituent roseoside. Planta Med 2010; 76:995-997. [PMID: 20143296 DOI: 10.1055/s-0029-1240868] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Plants of the genus Bauhinia are used in several countries worldwide for the treatment of diabetes, and several related species have been shown to have hypoglycaemic effects in vivo in both normoglycaemic and alloxan- and streptozotocin-treated animal models. In this study, the insulin-secreting cell line INS-1 was used to examine the effects of the crude ethanolic extract of leaves of B. variegata L. var. Candida Voidt and its major metabolite (6 S,7 E,9 R)-9-hydroxymegastigma-4,7-dien-3-one-9- beta-glycopyraroside (roseoside) on insulinotropic activity. The crude extracts and the major metabolite were shown to increase insulin secretion in a dose-dependant manner.
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Affiliation(s)
- Neil Frankish
- Trinity College Dublin, School of Pharmacy and Pharmaceutical Sciences, Dublin, Ireland.
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Sheridan H, Walsh JJ, Jordan M, Cogan C, Frankish N. A series of 1, 2-coupled indane dimers with mast cell stabilisation and smooth muscle relaxation properties. Eur J Med Chem 2009; 44:5018-22. [PMID: 19793620 DOI: 10.1016/j.ejmech.2009.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 09/02/2009] [Accepted: 09/03/2009] [Indexed: 10/20/2022]
Abstract
Asthma is characterised by bronchoconstriction and inflammation, with infiltration and activation of inflammatory cells such as eosinophils and mast cells, and subsequent release of inflammatory mediators. Much of the therapy directed at the treatment of asthma is either to provide symptomatic relief through bronchodilation or to reduce inflammation to prevent or delay airway remodelling. In an attempt to address both of these issues, a novel series of 1,2-indane dimers has been synthesized and evaluated for smooth muscle relaxant and mast cell stabilising activities. We have identified two lead compounds, 5 and 15, which have substantial mast cell stabilisation activity.
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Affiliation(s)
- H Sheridan
- Trinity College Dublin, Department of Pharmacy and Pharmaceutical Sciences, Panoz Institute, Westland Row, Dublin 2, Ireland.
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Passante E, Frankish N. The RBL-2H3 cell line: its provenance and suitability as a model for the mast cell. Inflamm Res 2009; 58:737-45. [DOI: 10.1007/s00011-009-0074-y] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/18/2009] [Accepted: 07/22/2009] [Indexed: 12/21/2022] Open
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15
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16
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Sheridan H, Hook I, Nestor C, Coppins J, Ehrhardt C, Frankish N. Inhibition of LFA-1 mediated T-cell motility by naphthoquinones. Planta Med 2008; 74:1383-1387. [PMID: 18666044 DOI: 10.1055/s-2008-1081303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An in vitro T-cell migration assay has been established that can be used to study the effects of compounds on the development of T-cell polarisation with HuT-78 T lymphocytes. This assay indicates the ability of compounds tested to inhibit the inflammatory response by decreasing LFA-1-mediated T-cell motility. The effect of a series of naturally occurring quinone isolates on motility has been evaluated in this assay. Distinct differences have been observed between naphthoquinones, dihydrofuranonaphthoquinones and anthraquinones.
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Affiliation(s)
- Helen Sheridan
- Trinity College Dublin, School of Pharmacy & Pharmaceutical Sciences, Panoz Institute, Dublin, Ireland.
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17
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Sheridan H, Butterly S, Walsh J, Cogan C, Jordan M, Nolan O, Frankish N. Synthesis and pharmacological activity of aminoindanone dimers and related compounds. Bioorg Med Chem 2008; 16:248-54. [DOI: 10.1016/j.bmc.2007.09.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 09/17/2007] [Accepted: 09/21/2007] [Indexed: 11/15/2022]
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18
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Affiliation(s)
- Egle Passante
- School of Pharmacy and Pharmaceutical Sciences, Trinity College DublinWestland RowDublin, 2Ireland
| | - Carsten Ehrhardt
- School of Pharmacy and Pharmaceutical Sciences, Trinity College DublinWestland RowDublin, 2Ireland
| | - Helen Sheridan
- School of Pharmacy and Pharmaceutical Sciences, Trinity College DublinWestland RowDublin, 2Ireland
| | - Neil Frankish
- School of Pharmacy and Pharmaceutical Sciences, Trinity College DublinWestland RowDublin, 2Ireland
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Menezes FDS, Minto ABM, Ruela HS, Kuster RM, Sheridan H, Frankish N. Hypoglycemic activity of two Brazilian Bauhinia species: Bauhinia forficata L. and Bauhinia monandra Kurz. Rev bras farmacogn 2007. [DOI: 10.1590/s0102-695x2007000100003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Abstract
As part of an ongoing search for novel molecules with therapeutic potential we examined the mediator release inhibition activity of a number of indanones and their derivatives. The aldol condensation product 18 was approximately twice as potent as disodium cromoglycate as an inhibitor of compound 48/80-stimulated histamine release from rat peritoneal mast cells. The activity of this class of dimeric indanone compound is significantly higher than controls and may represent a new class of mast cell stabilizing agents. Compound 18 has been selected for further biological evaluation of its mast cell stabilization profile.
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Affiliation(s)
- Neil Frankish
- School of Pharmacy, Panoz Institute, Trinity College, Dublin 2, Ireland.
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21
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Simplício AL, Gilmer JF, Frankish N, Sheridan H, Walsh JJ, Clancy JM. Ionisation characteristics and elimination rates of some aminoindanones determined by capillary electrophoresis. J Chromatogr A 2004; 1045:233-8. [PMID: 15378900 DOI: 10.1016/j.chroma.2004.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Capillary electrophoresis (CE) has emerged as an important tool for evaluating the ionisation characteristics of compounds and their corresponding pKa values. A particular strength of CE in this context is that its relative selectivity allows one to measure the extent of ionisation of materials that are impure. In this study, using CE, we have measured the pKa values of a series of anti-inflammatory aminoindanones, which underwent degradation to indenone during the course of the determination. We subsequently monitored the elimination reactions measuring remaining indanone over the pH range 2.6-10 at constant ionic strength and temperature. The decomposition of the tertiary amino derivatives was especially fast with first-order half-lives of less than 10 min observed at pH 7.4. The resulting sigmoidal pH rate profiles can be accounted for by assuming unimolecular elimination of the protonated (slow) and neutral (fast) forms of the amines. This study provides further support for the use of CE in evaluating amino ionisation especially in cases where degradation might be expected.
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Abstract
The natural products pterosin Z, acetylpterosin Z, originally from the fern Pteridium aquilinum, and their isopterosin analogues have been synthesized and their smooth muscle relaxation activity has been measured. All of the test compounds show activity with pterosin Z being the most active (EC50 = 1.3 +/- 0.1 x 10(-6) M), exhibiting 100 times the activity reported for the related fern metabolites onitin (EC50 = 1 x 10(-4) M), onotisin (EC50 = 2 x 10(-3) M) and otninoside (EC50 = 7 x 10(-4) M). The smooth muscle relaxant activity of pterosin Z is approximately equipotent with that of the related fungal pterosin (EC50 of 2.9 +/- 1.6 x 10(-6) M). These results suggest that smooth muscle relaxant activity is reduced when a phenol group is present in the pterosin nucleus and when one of the dimethyl groups is derivatized.
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Ehrhardt AG, Frankish N, Isenberg G. A large-conductance K+ channel that is inhibited by the cytoskeleton in the smooth muscle cell line DDT1 MF-2. J Physiol 1996; 496 ( Pt 3):663-76. [PMID: 8930834 PMCID: PMC1160854 DOI: 10.1113/jphysiol.1996.sp021717] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
1. DDT1 MF-2 smooth muscle cells responded to the bath application of histamine or ATP with an increase in the cytosolic Ca2+ concentration ([Ca2+]c) and the whole-cell K+ current, IK(BA). 2. In cell-attached patches, histamine (100 microM) activated currents through a 200 pS K+ channel ('BKA' channel). In the absence of agonists, the BKA channel was activated by excision of the patch. Both histamine and patch excision increased the channel activity (NPo; where N is the number of channels per patch and Po is the open probability) by reducing the long closures between the bursts of openings. 3. In inside-out patches, the BKA channel had a conductance of 201 +/- 4 pS (symmetrical solutions of 150 mM KCl, 2 mM MgCl2 and 2 mM EGTA). Replacement of K+ in the patch electrode by Na+, Li+ or Cs+ prevented the flow of inward currents and reduced the outward K+ conductance to 113 pS. 4. NPo was insensitive to changes in [Ca2+]c from 10 nM to 1 microM. NPo was also not modified either by cytosolic Na+, ATP, GTP, GTP gamma S, dithiothreitol or TEA (10 mM) or by extracellular 4-aminopyridine (5 mM), glibenclamide (20 microM) or TEA (10 mM). The BKA channel was blocked by 5 mM intracellular BaCl2 or by 10 nM extracellular iberiotoxin. 5. In cell-attached patches, BKA channel activity could be induced by 1 microM cytochalasin B, applied either through the patch pipette or in the bath solution. The effects of cytochalasin B, of patch excision, or of histamine on NPo were not additive but saturative. 6. Whole DDT1 MF-2 cells had resting potentials of -10 mV, dominated by the chloride conductance; the resting potential changed to -82 mV when the K+ conductance was increased by cytochalasin B or by histamine. The effects of cytochalasin B and histamine on IK(BA) were not additive but saturative. 7. We discuss the hypothesis that the interaction between the cytoskeleton and the BKA channel promotes the long channel closures; depolymerization of F-actin may constitute a mechanism by which the agonists histamine or ATP disinhibit BKA channel activity.
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Affiliation(s)
- A G Ehrhardt
- Program in Molecular Medicine, University of Massachusetts Medical Center, Worcester 01605, USA
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Sheridan H, Lemon S, Frankish N, McArdle P, Higgins T, James JP, Bhandari P. Synthesis and antispasmodic activity of nature identical substituted indanes and analogues. Eur J Med Chem 1990. [DOI: 10.1016/0223-5234(90)90185-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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