1
|
Ellis SLS, Dada S, Nohara LL, Saranchova I, Munro L, Pfeifer CG, Eyford BA, Morova T, Williams DE, Cheng P, Lack NA, Andersen RJ, Jefferies WA. Curcuphenol possesses an unusual histone deacetylase enhancing activity that counters immune escape in metastatic tumours. Front Pharmacol 2023; 14:1119620. [PMID: 37637416 PMCID: PMC10449465 DOI: 10.3389/fphar.2023.1119620] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 07/03/2023] [Indexed: 08/29/2023] Open
Abstract
Curcuphenol, a common component of the culinary spices, naturally found in marine invertebrates and plants, has been identified as a novel candidate for reversing immune escape by restoring expression of the antigen presentation machinery (APM) in invasive cancers, thereby resurrecting the immune recognition of metastatic tumours. Two synthetic curcuphenol analogues, were prepared by informed design that demonstrated consistent induction of APM expression in metastatic prostate and lung carcinoma cells. Both analogues were subsequently found to possess a previously undescribed histone deacetylase (HDAC)-enhancing activity. Remarkably, the H3K27ac ChIPseq analysis of curcuphenol-treated cells reveals that the induced epigenomic marks closely resemble the changes in genome-wide pattern observed with interferon-γ, a cytokine instrumental for orchestrating innate and adaptive immunity. These observations link dietary components to modifying epigenetic programs that modulate gene expression guiding poised immunity.
Collapse
Affiliation(s)
- Samantha L. S. Ellis
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Sarah Dada
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Lilian L. Nohara
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Iryna Saranchova
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Lonna Munro
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Cheryl G. Pfeifer
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Brett A. Eyford
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Tunc Morova
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - David E. Williams
- Departments of Chemistry and Earth Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Ping Cheng
- Departments of Chemistry and Earth Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Nathan A. Lack
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- School of Medicine, Koç University, Istanbul, Türkiye
| | - Raymond J. Andersen
- Departments of Chemistry and Earth Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Wilfred A. Jefferies
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
2
|
Somteds A, Kanokmedhakul S, Yahuafai J, Opanasopit P, Patrick BO, Andersen RJ, Kanokmedhakul K. New norclerodane diterpenoids from bulbils of Dioscorea bulbifera L. Nat Prod Res 2023:1-8. [PMID: 37496114 DOI: 10.1080/14786419.2023.2237172] [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: 03/10/2023] [Revised: 06/19/2023] [Accepted: 07/09/2023] [Indexed: 07/28/2023]
Abstract
Investigation of extracts from bulbils of Dioscorea bulbifera L. yielded two new norclerodane diterpenoids, diosbulbin N acetate (1) and epi-diosbulbin B (3), together with eleven known compounds. Their structures were established based on spectroscopy. The absolute configurations of 1 and diosbulbin B (2) were determined by X-ray crystallographic analysis using Cu Kα radiation. The absolute configuration of 3 was determined by comparison of its ECD spectrum to that of 2. Isolated phenanthrenes 7, 9 and 10 exhibited moderate cytotoxicity against the HelaS3 cell line with IC50 values of 9.03 ± 0.04, 27.13 ± 6.86 and 10.88 ± 2.75 µM, respectively. In addition, 7-9 and 11 showed potent inhibition of NO production by LPS-induced RAW 264.7 macrophages.
Collapse
Affiliation(s)
- Apisara Somteds
- Natural Product Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Somdej Kanokmedhakul
- Natural Product Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Jantana Yahuafai
- Division of Research and Academic Support, National Cancer Institute, Bangkok, Thailand
| | - Praneet Opanasopit
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, Thailand
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, Vancouver, Canada
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, Canada
| | - Kwanjai Kanokmedhakul
- Natural Product Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| |
Collapse
|
3
|
Blagojevic P, Perez-Vargas J, Jian K, Williams DE, Villanueva I, Thompson CAH, Ennis S, Niikura M, Tietjen I, Jean F, Andersen RJ. Synthetic Analogs of the Sponge Sesterterpenoid Alotaketal C are Potent Inhibitors of SARS-CoV-2 Omicron BA.1 and BA.5 Infections of Human Lung Cells. Org Lett 2023. [PMID: 37358030 DOI: 10.1021/acs.orglett.3c01536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
The protein kinase C-activating sponge natural product alotaketal C (1) potently inhibits the infection of human Calu-3 lung cells by SARS-CoV-2 Omicron BA.1 and BA.5 variants. Simplified analogs of 1 have been synthesized and tested for anti-SARS-CoV-2 activity providing SAR data for the antiviral pharmacophore of 1. Analogs 19 and 23, which are missing the C-11 substituents in 1 and have modified C-13 appendages, are ∼2- to 7-fold more potent than 1 and have equal or larger selectivity indices.
Collapse
Affiliation(s)
- Polina Blagojevic
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Jimena Perez-Vargas
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Kunzhong Jian
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Ivan Villanueva
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Connor A H Thompson
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Siobhan Ennis
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Masahiro Niikura
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Ian Tietjen
- The Wistar Institute, Philadelphia, Pennsylvania, 19104, United States
| | - François Jean
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| |
Collapse
|
4
|
Nohara LL, Ellis SLS, Dreier C, Dada S, Saranchova I, Munro L, Pfeifer CG, Coyle KM, Morrice JR, Shim DJS, Ahn P, De Voogd N, Williams DE, Cheng P, Garrovillas E, Andersen RJ, Jefferies WA. A novel cell-based screen identifies chemical entities that reverse the immune-escape phenotype of metastatic tumours. Front Pharmacol 2023; 14:1119607. [PMID: 37256225 PMCID: PMC10225555 DOI: 10.3389/fphar.2023.1119607] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 03/21/2023] [Indexed: 06/01/2023] Open
Abstract
Genetic and epigenetic events have been implicated in the downregulation of the cellular antigen processing and presentation machinery (APM), which in turn, has been associated with cancer evasion of the immune system. When these essential components are lacking, cancers develop the ability to subvert host immune surveillance allowing cancer cells to become invisible to the immune system and, in turn, promote cancer metastasis. Here we describe and validate the first high-throughput cell-based screening assay to identify chemical extracts and unique chemical entities that reverse the downregulation of APM components in cell lines derived from metastatic tumours. Through the screening of a library of 480 marine invertebrate extracts followed by bioassay-guided fractionation, curcuphenol, a common sesquiterpene phenol derived from turmeric, was identified as the active compound of one of the extracts. We demonstrate that curcuphenol induces the expression of the APM components, TAP-1 and MHC-I molecules, in cell lines derived from both metastatic prostate and lung carcinomas. Turmeric and curcumins that contain curcuphenol have long been utilized not only as a spice in the preparation of food, but also in traditional medicines for treating cancers. The remarkable discovery that a common component of spices can increase the expression of APM components in metastatic tumour cells and, therefore reverse immune-escape mechanisms, provides a rationale for the development of foods and advanced nutraceuticals as therapeutic candidates for harnessing the power of the immune system to recognize and destroy metastatic cancers.
Collapse
Affiliation(s)
- Lilian L. Nohara
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Samantha L. S. Ellis
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Carola Dreier
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Sarah Dada
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Iryna Saranchova
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Lonna Munro
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Cheryl G. Pfeifer
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Krysta M. Coyle
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
| | - Jessica R. Morrice
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Daniel Joo Sung Shim
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Paul Ahn
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Nicole De Voogd
- Netherlands Centre for Biodiversity Naturalis, Leiden, Netherlands
| | - David E. Williams
- Departments of Chemistry and Earth Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Ping Cheng
- Departments of Chemistry and Earth Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Emmanuel Garrovillas
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
| | - Raymond J. Andersen
- Departments of Chemistry and Earth Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Wilfred A. Jefferies
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
- The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
- Departments of Medical Genetics, Zoology, and Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
5
|
Teerapongpisan P, Suthiphasilp V, Kumboonma P, Maneerat T, Duangyod T, Charoensup R, Andersen RJ, Laphookhieo S. Phaeanthuslucidines A-D, dimeric aporphine alkaloid derivatives from Phaeanthus lucidus oliv. Phytochemistry 2023; 212:113717. [PMID: 37187248 DOI: 10.1016/j.phytochem.2023.113717] [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] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/04/2023] [Accepted: 05/08/2023] [Indexed: 05/17/2023]
Abstract
The first phytochemical investigation of the twigs of Phaeanthus lucidus Oliv. Resulted in the isolation and identification of four undescribed alkaloids, including two aporphine dimers, phaeanthuslucidines A and B, a hybrid of aristolactam-aporphine, phaeanthuslucidine C, and a C-N linked aporphine dimer, phaeanthuslucidine D, together with two known compounds. Their structures were determined by extensive analysis of spectroscopic data, and by comparison of their spectroscopic and physical data with previous reports. Phaeanthuslucidines A-C and bidebiline E were analysed and resolved by chiral HPLC to yield the (Ra) and (Sa) atropisomers, whose absolute configurations were respectively determined by ECD calculations. Phaeanthuslucidines A and B, bidebiline E, and lanuginosine showed α-glucosidase inhibitory activities with IC50 values in the range of 6.7-29.2 μM. Moreover, molecular docking simulations of α-glucosidase inhibition of active compounds were studied.
Collapse
Affiliation(s)
- Passakorn Teerapongpisan
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Virayu Suthiphasilp
- Department of Industrial Technology and Innovation Management, Faculty of Science and Technology, Pathumwan Institute of Technology, Bangkok, 10330, Thailand
| | - Pakit Kumboonma
- Department of Applied Chemistry, Faculty of Science and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima, 30000, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand
| | - Thidarat Duangyod
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Raymond J Andersen
- Departments of Chemistry and Earth Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand.
| |
Collapse
|
6
|
Williams DE, Cassel J, Zhu JL, Yang JX, de Voogd NJ, Matainaho T, Salvino JM, Wang YA, Montaner LJ, Tietjen I, Andersen RJ. Thorectidiol A Isolated from the Marine Sponge Dactylospongia elegans Disrupts Interactions of the SARS-CoV-2 Spike Receptor Binding Domain with the Host ACE2 Receptor. J Nat Prod 2023; 86:582-588. [PMID: 36657039 PMCID: PMC9885524 DOI: 10.1021/acs.jnatprod.2c01030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Indexed: 06/15/2023]
Abstract
Thorectidiols isolated from the marine sponge Dactylospongia elegans (family Thorectidae, order Dictyoceratida) collected in Papua New Guinea are a family of symmetrical and unsymmetrical dimeric biphenyl meroterpenoid stereoisomers presumed to be products of oxidative phenol coupling of a co-occurring racemic monomer, thorectidol (3). One member of the family, thorectidiol A (1), has been isolated in its natural form, and its structure has been elucidated by analysis of NMR, MS, and ECD data. Acetylation of the sponge extract facilitated isolation of additional thorectidiol diacetate stereoisomers and the isolation of the racemic monomer thorectidol acetate (6). Racemic thorectidiol A (1) showed selective inhibition of the SARS-CoV-2 spike receptor binding domain (RBD) interaction with the host ACE2 receptor with an IC50 = 1.0 ± 0.7 μM.
Collapse
Affiliation(s)
- David E. Williams
- Department of Chemistry, University of
British Columbia, 2036 Main Mall, Vancouver,
B.C.Canada, V6T 1Z1
- Department of Earth, Ocean & Atmospheric Sciences,
University of British Columbia, 2207 Main Mall, Vancouver,
B.C.Canada, V6T 1Z4
| | - Joel Cassel
- The Wistar Institute,
Philadelphia, Pennsylvania19104, United States
| | - Jin-Lin Zhu
- Department of Chemistry, University of
British Columbia, 2036 Main Mall, Vancouver,
B.C.Canada, V6T 1Z1
| | - Jian-Xiong Yang
- Department of Chemistry, University of
British Columbia, 2036 Main Mall, Vancouver,
B.C.Canada, V6T 1Z1
| | - Nicole J. de Voogd
- Naturalis Biodiversity Center,
P.O. Box 9517, 2300RALeiden, The Netherlands
| | - Teatulohi Matainaho
- University of Papua New Guinea,
University National Capital District, 134, Papua New Guinea
| | - Joseph M. Salvino
- The Wistar Institute,
Philadelphia, Pennsylvania19104, United States
| | - Yan Alexander Wang
- Department of Chemistry, University of
British Columbia, 2036 Main Mall, Vancouver,
B.C.Canada, V6T 1Z1
| | - Luis J. Montaner
- The Wistar Institute,
Philadelphia, Pennsylvania19104, United States
| | - Ian Tietjen
- The Wistar Institute,
Philadelphia, Pennsylvania19104, United States
| | - Raymond J. Andersen
- Department of Chemistry, University of
British Columbia, 2036 Main Mall, Vancouver,
B.C.Canada, V6T 1Z1
- Department of Earth, Ocean & Atmospheric Sciences,
University of British Columbia, 2207 Main Mall, Vancouver,
B.C.Canada, V6T 1Z4
| |
Collapse
|
7
|
Perez-Vargas J, Shapira T, Olmstead AD, Villanueva I, Thompson CA, Ennis S, Gao G, De Guzman J, Williams DE, Wang M, Chin A, Bautista-Sanchez D, Agafitei O, Levett P, Xie X, Nuzzo G, Freire VF, Quintana-Bulla JI, Bernardi DI, Gubiani JR, Suthiphasilp V, Raksat A, Meesakul P, Polbuppha I, Cheenpracha S, Jaidee W, Kanokmedhakul K, Yenjai C, Chaiyosang B, Teles HL, Manzo E, Fontana A, Leduc R, Boudreault PL, Berlinck RG, Laphookhieo S, Kanokmedhakul S, Tietjen I, Cherkasov A, Krajden M, Nabi IR, Niikura M, Shi PY, Andersen RJ, Jean F. Corrigendum to “Discovery of lead natural products for developing pan-SARS-CoV-2 therapeutics” “Antiviral Research 209 (2023)/105484”. Antiviral Res 2023; 213:105577. [PMID: 37002158 PMCID: PMC10060119 DOI: 10.1016/j.antiviral.2023.105577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
|
8
|
Teerapongpisan P, Suthiphasilp V, Phukhatmuen P, Rujanapun N, Chaiyosang B, Tontapha S, Maneerat T, Patrick BO, Duangyod T, Charoensup R, Andersen RJ, Laphookhieo S. Dimeric aporphine alkaloids from the twigs of Trivalvaria costata (Hook.f. & Thomson) I.M.Turner. Phytochemistry 2023; 207:113586. [PMID: 36632950 DOI: 10.1016/j.phytochem.2023.113586] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
A phytochemical investigation of the twig extract of Trivalvaria costata (Hook.f. & Thomson) I.M.Turner has identified ten undescribed dimeric aporphine alkaloids, trivalcostatines A-J, one undescribed isoquinoline alkaloid, trivalcostaisoquinoline, and four known aporphine alkaloids. Their structures were elucidated by detailed analysis of NMR and HRESITOFMS data. Three of the dimeric aporphine structures were confirmed by single crystal X-ray diffraction analysis. All of the dimeric aporphine alkaloids were isolated as mixtures of atropisomers. Several of them were resolved by chiral-phase HPLC and the absolute configurations of the pure atropisomers were assigned by calculated and experimental ECD analysis. Bidebilines A and B, heteropsine, and urabaine showed α-glucosidase inhibitory activities with IC50 values in the range of 4.1-11 μM.
Collapse
Affiliation(s)
- Passakorn Teerapongpisan
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Virayu Suthiphasilp
- Department of Industrial Technology and Innovation Management, Faculty of Science and Technology, Pathumwan Institute of Technology, Bangkok, 10330, Thailand
| | - Piyaporn Phukhatmuen
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Narawadee Rujanapun
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand
| | - Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sarawut Tontapha
- Institute of Nanomaterials Research and Innovation for Energy, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Thidarat Duangyod
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada; Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand.
| |
Collapse
|
9
|
Polbuppha I, Teerapongpisan P, Phukhatmuen P, Suthiphasilp V, Maneerat T, Charoensup R, Andersen RJ, Laphookhieo S. Alkaloids and Styryl lactones from Goniothalamus ridleyi King and Their α-Glucosidase Inhibitory Activity. Molecules 2023; 28:molecules28031158. [PMID: 36770823 PMCID: PMC9918889 DOI: 10.3390/molecules28031158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/11/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Gonioridleylactam (1), a new compound, is a unique dimeric aristolactam isolated from the EtOAc extract of the twigs of Goniothalamus ridleyi King. The structure of gonioridleylactam (1) consists of two different aristolactams linked together with two methylenedioxy bridges at C-3/C-3' and C-4/C-4', generating a ten-membered ring of [1,3,6,8]tetraoxecine. A new natural product, gonioridleyindole (3-hydroxymethyl-1-methyl-1H-benz[f]indole-4,9-dione, 2), together with eight known compounds (3-10) were also isolated from this plant. Their structures were extensively characterized by spectroscopic methods and comparisons were made with the literature. Compounds 1-4, 7, and 9 were evaluated for their α-glucosidase inhibitory activity. Of these, 3,5-demethoxypiperolide (7) displayed the highest α-glucosidase inhibitory activity, with an IC50 value of 1.25 µM.
Collapse
Affiliation(s)
- Isaraporn Polbuppha
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Passakorn Teerapongpisan
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Piyaporn Phukhatmuen
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Virayu Suthiphasilp
- Department of Industrial Technology and Innovation Management, Faculty of Science and Technology, Pathumwan Institute of Technology, Bangkok 10330, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
- Medicinal Plant Innovation Center, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plant Innovation Center, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Raymond J. Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036, Main Mall, Vancouver, BC V6T 1Z1, Canada
- Correspondence: (R.J.A.); (S.L.)
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
- Medicinal Plant Innovation Center, Mae Fah Luang University, Chiang Rai 57100, Thailand
- Correspondence: (R.J.A.); (S.L.)
| |
Collapse
|
10
|
Pérez-Vargas J, Shapira T, Olmstead AD, Villanueva I, Thompson CAH, Ennis S, Gao G, De Guzman J, Williams DE, Wang M, Chin A, Bautista-Sánchez D, Agafitei O, Levett P, Xie X, Nuzzo G, Freire VF, Quintana-Bulla JI, Bernardi DI, Gubiani JR, Suthiphasilp V, Raksat A, Meesakul P, Polbuppha I, Cheenpracha S, Jaidee W, Kanokmedhakul K, Yenjai C, Chaiyosang B, Teles HL, Manzo E, Fontana A, Leduc R, Boudreault PL, Berlinck RGS, Laphookhieo S, Kanokmedhakul S, Tietjen I, Cherkasov A, Krajden M, Nabi IR, Niikura M, Shi PY, Andersen RJ, Jean F. Discovery of lead natural products for developing pan-SARS-CoV-2 therapeutics. Antiviral Res 2023; 209:105484. [PMID: 36503013 PMCID: PMC9729583 DOI: 10.1016/j.antiviral.2022.105484] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/26/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), remains a global public health crisis. The reduced efficacy of therapeutic monoclonal antibodies against emerging SARS-CoV-2 variants of concern (VOCs), such as omicron BA.5 subvariants, has underlined the need to explore a novel spectrum of antivirals that are effective against existing and evolving SARS-CoV-2 VOCs. To address the need for novel therapeutic options, we applied cell-based high-content screening to a library of natural products (NPs) obtained from plants, fungi, bacteria, and marine sponges, which represent a considerable diversity of chemical scaffolds. The antiviral effect of 373 NPs was evaluated using the mNeonGreen (mNG) reporter SARS-CoV-2 virus in a lung epithelial cell line (Calu-3). The screening identified 26 NPs with half-maximal effective concentrations (EC50) below 50 μM against mNG-SARS-CoV-2; 16 of these had EC50 values below 10 μM and three NPs (holyrine A, alotaketal C, and bafilomycin D) had EC50 values in the nanomolar range. We demonstrated the pan-SARS-CoV-2 activity of these three lead antivirals against SARS-CoV-2 highly transmissible Omicron subvariants (BA.5, BA.2 and BA.1) and highly pathogenic Delta VOCs in human Calu-3 lung cells. Notably, holyrine A, alotaketal C, and bafilomycin D, are potent nanomolar inhibitors of SARS-CoV-2 Omicron subvariants BA.5 and BA.2. The pan-SARS-CoV-2 activity of alotaketal C [protein kinase C (PKC) activator] and bafilomycin D (V-ATPase inhibitor) suggest that these two NPs are acting as host-directed antivirals (HDAs). Future research should explore whether PKC regulation impacts human susceptibility to and the severity of SARS-CoV-2 infection, and it should confirm the important role of human V-ATPase in the VOC lifecycle. Interestingly, we observed a synergistic action of bafilomycin D and N-0385 (a highly potent inhibitor of human TMPRSS2 protease) against Omicron subvariant BA.2 in human Calu-3 lung cells, which suggests that these two highly potent HDAs are targeting two different mechanisms of SARS-CoV-2 entry. Overall, our study provides insight into the potential of NPs with highly diverse chemical structures as valuable inspirational starting points for developing pan-SARS-CoV-2 therapeutics and for unravelling potential host factors and pathways regulating SARS-CoV-2 VOC infection including emerging omicron BA.5 subvariants.
Collapse
Affiliation(s)
- Jimena Pérez-Vargas
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Tirosh Shapira
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Andrea D Olmstead
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Ivan Villanueva
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Connor A H Thompson
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Siobhan Ennis
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Guang Gao
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Joshua De Guzman
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Meng Wang
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Aaleigha Chin
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Diana Bautista-Sánchez
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Olga Agafitei
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Paul Levett
- British Columbia Centre for Disease Control Public Health Laboratory, Vancouver, BC, V5Z 4R4, Canada
| | - Xuping Xie
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Genoveffa Nuzzo
- Bio-Organic Chemistry Unit, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Vitor F Freire
- Instituto de Química de São Carlos, Universidade de São Paulo, CP780, CEP13560-970, São Carlos, SP, Brazil
| | - Jairo I Quintana-Bulla
- Instituto de Química de São Carlos, Universidade de São Paulo, CP780, CEP13560-970, São Carlos, SP, Brazil
| | - Darlon I Bernardi
- Instituto de Química de São Carlos, Universidade de São Paulo, CP780, CEP13560-970, São Carlos, SP, Brazil
| | - Juliana R Gubiani
- Instituto de Química de São Carlos, Universidade de São Paulo, CP780, CEP13560-970, São Carlos, SP, Brazil
| | - Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Achara Raksat
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Pornphimol Meesakul
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Isaraporn Polbuppha
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | | | - Wuttichai Jaidee
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Chavi Yenjai
- Natural Products Research Unit, Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Helder Lopes Teles
- Instituto de Ciências Exatas e Naturais, Universidade Federal de Rondonópolis, CEP 78736-900, Rondonópolis, MT, Brazil
| | - Emiliano Manzo
- Bio-Organic Chemistry Unit, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, 80078, Pozzuoli, Italy
| | - Angelo Fontana
- Bio-Organic Chemistry Unit, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, 80078, Pozzuoli, Italy; Department of Biology, Università di Napoli "Federico II", Via Cupa Nuova Cinthia 21, 80126, Napoli, Italy
| | - Richard Leduc
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Pierre-Luc Boudreault
- Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Québec, J1H 5N4, Canada
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP780, CEP13560-970, São Carlos, SP, Brazil
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Ian Tietjen
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC V6T 1Z1, Canada; The Wistar Institute, Philadelphia, PA, 19104, USA
| | - Artem Cherkasov
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Mel Krajden
- British Columbia Centre for Disease Control Public Health Laboratory, Vancouver, BC, V5Z 4R4, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Ivan Robert Nabi
- Department of Cellular and Physiological Sciences, School of Biomedical Engineering, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Masahiro Niikura
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Pei-Yong Shi
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, BC V6T 1Z1, Canada.
| | - François Jean
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
| |
Collapse
|
11
|
Takaki M, Williams DE, Freire VF, Sartori SB, Lira SP, Bizarria R, Rodrigues A, Gonçalves da Costa DR, Amorim MR, Ferreira AG, Andersen RJ, Linington RG, Berlinck RGS. Metabolomics Reveals a 26-Membered Macrolactone Produced by Endophytic Colletotrichum spp. from Alcatrazes Island, Brazil. Org Lett 2022; 24:9381-9385. [PMID: 36521009 DOI: 10.1021/acs.orglett.2c03531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Comparative metabolomics analysis of nonphytotoxic endophytic Colletotrichum spp. isolated from Anthurium alcatrazense endemic to Alcatrazes island (Brazil) and phytopathogenic Colletotrichum spp. isolated from the mainland of Brazil revealed significant differences in chemical composition. Examination of endophytic Colletotrichum spp. from Alcatrazes island led to the discovery of a 26-member macrolactone, colletotrichumolide (1), containing a phosphatidyl choline side chain. Further examination of the phytopathogenic strains from the mainland identified a family of phytopathogenic metabolites not present in the nonpathogenic island-derived strains, suggesting that geographical isolation could influence the secondary metabolism of fungal strains.
Collapse
Affiliation(s)
- Mirelle Takaki
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil.,Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - David E Williams
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Vitor F Freire
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil
| | - Sérgio B Sartori
- Departamento de Ciências Exatas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de Sâo Paulo, Avenida Pádua Dias, 11, CP 9, Agronomia, CEP 13418-900, Piracicaba, SP, Brazil
| | - Simone P Lira
- Departamento de Ciências Exatas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de Sâo Paulo, Avenida Pádua Dias, 11, CP 9, Agronomia, CEP 13418-900, Piracicaba, SP, Brazil
| | - Rodolfo Bizarria
- Departamento de Biologia Geral e Aplicada, Universidade Estadual Paulista (UNESP), Rio Claro, 13.506-900, SP, Brazil
| | - Andre Rodrigues
- Departamento de Biologia Geral e Aplicada, Universidade Estadual Paulista (UNESP), Rio Claro, 13.506-900, SP, Brazil
| | | | - Marcelo R Amorim
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil
| | - Antonio G Ferreira
- Departamento de Química, Universidade Federal de São Carlos, 13565-905, São Carlos, SP, Brazil
| | - Raymond J Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, SP, Brazil
| |
Collapse
|
12
|
Meesakul P, Suthiphasilp V, Teerapongpisan P, Rujanapun N, Chaiyosang B, Tontapha S, Phukhatmuen P, Maneerat T, Charoensup R, Duangyod T, Patrick BO, Andersen RJ, Laphookhieo S. Rotenoids and isoflavones from the leaf and pod extracts of Millettia brandisiana Kurz. Phytochemistry 2022; 204:113440. [PMID: 36130672 DOI: 10.1016/j.phytochem.2022.113440] [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] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 06/15/2023]
Abstract
Phytochemical investigations of the leaf and pod extracts of Millettia brandisiana Kurz led to the isolation and identification of four previously undescribed rotenoids, (-)-(6aS,12aS)-millettiabrandisins A-C and (-)-(6aS,12aS)-6-deoxyclitoriacetal, two previously undescribed isoflavones, millettiabrandisins D and E, and 20 known compounds. The structures of previously undescribed compounds were determined on the basis of NMR and MS data. The absolute configurations of (-)-(6aS,12aS)-millettiabrandisins A-C were determined from the comparison of their experimental and calculated ECD spectra. (-)-(6aR,12aR)-12a-Hydroxy-α-toxicarol was also confirmed by X-ray crystallographic data. Some isolated compounds were evaluated for their cytotoxicity against three cancer cell lines, including lung cancer (A549), colorectal cancer (SW480), and leukemic cells (K562). Of these, α-toxicarol displayed the best cytotoxicity against lung cancer (A549) and leukemic cells (K562) with the IC50 values of 104.4 and 67.5 μM, respectively. 6″,6″-Dimethylchromene-[2″,3″:7,8]-flavone showed the highest cytotoxicity against colorectal cancer (SW480) with an IC50 value of 97.2 μM.
Collapse
Affiliation(s)
- Pornphimon Meesakul
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Department of Industrial Technology and Innovation Management, Faculty of Science and Technology, Pathumwan Institute of Technology, Bangkok, 10330, Thailand
| | - Passakorn Teerapongpisan
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Narawadee Rujanapun
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand
| | - Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sarawut Tontapha
- Institute of Nanomaterials Research and Innovation for Energy, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Piyaporn Phukhatmuen
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Thidarat Duangyod
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada; Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada; Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, 57100, Thailand.
| |
Collapse
|
13
|
Wei ZW, Niikura H, Morgan KD, Vacariu CM, Andersen RJ, Ryan KS. Free Piperazic Acid as a Precursor to Nonribosomal Peptides. J Am Chem Soc 2022; 144:13556-13564. [PMID: 35867963 DOI: 10.1021/jacs.2c03660] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Piperazic acid (Piz) is a nonproteinogenic amino acid possessing a rare nitrogen-nitrogen bond. However, little is known about how Piz is incorporated into nonribosomal peptides, including whether adenylation domains specific to Piz exist. In this study, we show that free piperazic acid is directly adenylated and then incorporated into the incarnatapeptin nonribosomal peptides through isotopic incorporation studies. We also use in vitro reconstitution to demonstrate adenylation of free piperazic acid with a three-domain nonribosomal peptide synthetase from the incarnatapeptin gene cluster. We furthermore use bioinformatics and site-directed mutagenesis to outline consensus sequences for the adenylation of piperazic acid, which can now be used for the prediction of gene clusters linked to piperazic-acid-containing peptides. Finally, we discover a fusion protein of a piperazate synthase and an adenylation domain, highlighting the close biosynthetic relationship of piperazic acid formation and its adenylation. Altogether, our work demonstrates the evolution of biosynthetic systems for the activation of free piperazic acid through adenylation, a pathway we suggest is likely to be employed in the majority of pathways to piperazic-acid-containing peptides.
Collapse
|
14
|
Suthiphasilp V, Rujanapun N, Kumboonma P, Chaiyosang B, Tontapha S, Maneerat T, Patrick BO, Andersen RJ, Duangyod T, Charoensup R, Laphookhieo S. Antidiabetic and Cytotoxic Activities of Rotenoids and Isoflavonoids Isolated from Millettia pachycarpa Benth. ACS Omega 2022; 7:24511-24521. [PMID: 35874225 PMCID: PMC9301698 DOI: 10.1021/acsomega.2c02163] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A phytochemical investigation of the root and leaf extracts of Millettia pachycarpa Benth resulted in the isolation and identification of 16 compounds, including six rotenoids (1-6) and 10 prenylated isoflavonoids (7-16). Compound 4 was isolated as a scalemic mixture, which was resolved by chiral HPLC to afford (-)-(6aS,12aS)-12a-hydroxy-α-toxicarol (4) and (+)-(6aR,12aR)-12a-hydroxy-α-toxicarol (4). (+)-(6aR,12aR)-Millettiapachycarpin (3) and (-)-(6aS,12aS)-12a-hydroxy-α-toxicarol (4) were isolated as new compounds. The absolute configuration of (-)-(6R)-pachycarotenoid (2), (+)-(6aR,12aR)-millettiapachycarpin (3), (-)-(6aS,12aS)-4 and (+)-(6aR,12aR)-12a-hydroxy-α-toxicarol (4), (+)-(6aS,12aS)-(5), and (-)-(6aS,12aS,2″R)-sumatrol (6) were identified by electronic circular dichroism (ECD) data. (-)-(6aS,12aS,2″R)-Sumatrol (6) was also confirmed by X-ray diffraction analysis using Cu-Kα radiation. Antidiabetic activities, including α-glucosidase and α-amylase inhibitory activities, and cytotoxicities against lung cancer A549, colorectal cancer SW480, and leukemic K562 cells of some isolated compounds were evaluated. Of these, isolupalbigenin (11) exhibited the highest α-glucosidase inhibitory activity, with an IC50 value of 11.3 ± 0.2 μM, whereas the scalemic mixture of 12a-hydroxy-α-toxicarol (4) displayed the best α-amylase inhibitory activity, with an IC50 value of 106.9 ± 0.2 μM. Euchrenone b10 (15) exhibited the highest cytotoxicity against lung cancer A549, colorectal cancer SW480, and leukemic K562 cells, with IC50 values of 40.3, 39.1, and 15.1 μM, respectively. In addition, molecular docking simulations of α-glucosidase inhibition of the active compounds were studied.
Collapse
Affiliation(s)
- Virayu Suthiphasilp
- Center
of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Narawadee Rujanapun
- Medicinal
Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Pakit Kumboonma
- Department
of Applied Chemistry, Faculty of Science and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
| | - Boonyanoot Chaiyosang
- Natural
Products Research Unit, Department of Chemistry and Center of Excellence
for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sarawut Tontapha
- Institute
of Nanomaterials Research and Innovation for Energy, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Tharakorn Maneerat
- Center
of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
- Medicinal
Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Brian O Patrick
- Departments
of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver BC V6T 1Z1, Canada
| | - Raymond J Andersen
- Departments
of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver BC V6T 1Z1, Canada
| | - Thidarat Duangyod
- Medicinal
Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
- School
of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal
Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
- School
of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Surat Laphookhieo
- Center
of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
- Medicinal
Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
| |
Collapse
|
15
|
Wang M, Sciorillo A, Read S, Divsalar DN, Gyampoh K, Zu G, Yuan Z, Mounzer K, Williams DE, Montaner LJ, de Voogd N, Tietjen I, Andersen RJ. Ansellone J, a Potent in Vitro and ex Vivo HIV-1 Latency Reversal Agent Isolated from a Phorbas sp. Marine Sponge. J Nat Prod 2022; 85:1274-1281. [PMID: 35522580 DOI: 10.1021/acs.jnatprod.1c01225] [Citation(s) in RCA: 3] [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: 06/14/2023]
Abstract
Five new minor sesterterpenoids, ansellones H (4), I (5), J (6), and K (7) and phorone C (8), have been isolated from a Phorbas sp. marine sponge collected in British Columbia. Their structures have been elucidated by detailed analysis of NMR and MS data. Ansellone J (6) and phorone C (8) are potent in vitro HIV-1 latency reversal agents that are more potent than the reference compound and control protein kinase C activator prostratin (3). The most potent Phorbas sesterterpenoid, ansellone J (6), was evaluated for HIV latency reversal in a primary cell context using CD4+ T cells obtained directly from four combination antiretroviral therapy-suppressed donors with HIV. To a first approximation, ansellone J (6) induced HIV latency reversal at levels similar to prostratin (3) ex vivo, but at a 10-fold lower concentration.
Collapse
Affiliation(s)
- Meng Wang
- Departments of Chemistry and Earth Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Amanda Sciorillo
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Silven Read
- Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Donya Naz Divsalar
- Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Kwasi Gyampoh
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Guorui Zu
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Zhe Yuan
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Karam Mounzer
- Jonathan Lax Immune Disorders Treatment Center, Philadelphia FIGHT Community Health Centers, Philadelphia, Pennsylvania 19107, United States
| | - David E Williams
- Departments of Chemistry and Earth Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Luis J Montaner
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
| | - Nicole de Voogd
- Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands
| | - Ian Tietjen
- The Wistar Institute, Philadelphia, Pennsylvania 19104, United States
- Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Raymond J Andersen
- Departments of Chemistry and Earth Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| |
Collapse
|
16
|
Teerapongpisan P, Suthiphasilp V, Maneerat T, Charoensup R, Duangyod T, Andersen RJ, Laphookhieo S. α-Glucosidase inhibitory and α-amylase inhibitory activities of compounds isolated from Uvaria rufa Blume. Nat Prod Res 2022; 36:6039-6043. [PMID: 35176917 DOI: 10.1080/14786419.2022.2041010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A new C-benzylated flavone, uvariaruflavone (1), along with 13 known compounds (2-14) were isolated from the twig and leaf extracts of Uvaria rufa Blume. Their structures were established by extensive spectroscopic methods. Flavones (5-8) and cyclohexene (10) were isolated from U. rufa for the first time. Most of the isolated compounds were evaluated for their α-glucosidase and α-amylase inhibitory activities. Of these, uvariaruflavone (1) showed the highest α-glucosidase inhibitory activity with an IC50 value of 44.3 µM, while ferrudiol (12) displayed the highest α-amylase inhibitory activity with an IC50 value of 73.5 µM.
Collapse
Affiliation(s)
- Passakorn Teerapongpisan
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, Thailand
| | - Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, Thailand.,Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, Thailand
| | - Rawiwan Charoensup
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, Thailand.,School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, Thailand
| | - Thidarat Duangyod
- Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, Thailand.,School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, Thailand
| | - Raymond J Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, Thailand.,Medicinal Plant Innovation Center of Mae Fah, Luang University, Chiang Rai, Thailand
| |
Collapse
|
17
|
Morgan KD, Williams DE, Ryan KS, Andersen RJ. Dentigerumycin F and G: dynamic structures retrieved through a genome-mining/nitrogen-NMR methodology. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153688] [Citation(s) in RCA: 1] [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] [Indexed: 10/19/2022]
|
18
|
Dada S, Ellis SLS, Wood C, Nohara LL, Dreier C, Garcia NH, Saranchova I, Munro L, Pfeifer CG, Eyford BA, Kari S, Garrovillas E, Caspani G, Al Haddad E, Gray PW, Morova T, Lack NA, Andersen RJ, Tjoelker L, Jefferies WA. Specific cannabinoids revive adaptive immunity by reversing immune evasion mechanisms in metastatic tumours. Front Immunol 2022; 13:982082. [PMID: 36923728 PMCID: PMC10010394 DOI: 10.3389/fimmu.2022.982082] [Citation(s) in RCA: 3] [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: 06/30/2022] [Accepted: 12/20/2022] [Indexed: 02/24/2023] Open
Abstract
Emerging cancers are sculpted by neo-Darwinian selection for superior growth and survival but minimal immunogenicity; consequently, metastatic cancers often evolve common genetic and epigenetic signatures to elude immune surveillance. Immune subversion by metastatic tumours can be achieved through several mechanisms; one of the most frequently observed involves the loss of expression or mutation of genes composing the MHC-I antigen presentation machinery (APM) that yields tumours invisible to Cytotoxic T lymphocytes, the key component of the adaptive cellular immune response. Fascinating ethnographic and experimental findings indicate that cannabinoids inhibit the growth and progression of several categories of cancer; however, the mechanisms underlying these observations remain clouded in uncertainty. Here, we screened a library of cannabinoid compounds and found molecular selectivity amongst specific cannabinoids, where related molecules such as Δ9-tetrahydrocannabinol, cannabidiol, and cannabigerol can reverse the metastatic immune escape phenotype in vitro by inducing MHC-I cell surface expression in a wide variety of metastatic tumours that subsequently sensitizing tumours to T lymphocyte recognition. Remarkably, H3K27Ac ChIPseq analysis established that cannabigerol and gamma interferon induce overlapping epigenetic signatures and key gene pathways in metastatic tumours related to cellular senescence, as well as APM genes involved in revealing metastatic tumours to the adaptive immune response. Overall, the data suggest that specific cannabinoids may have utility in cancer immunotherapy regimens by overcoming immune escape and augmenting cancer immune surveillance in metastatic disease. Finally, the fundamental discovery of the ability of cannabinoids to alter epigenetic programs may help elucidate many of the pleiotropic medicinal effects of cannabinoids on human physiology.
Collapse
Affiliation(s)
- Sarah Dada
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Samantha L S Ellis
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Christi Wood
- Biotechnology - Biomedical Science and Technology (BST), University of Applied Sciences, Mannheim, Germany
| | - Lilian L Nohara
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Carola Dreier
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.,Biotechnology - Biomedical Science and Technology (BST), University of Applied Sciences, Mannheim, Germany
| | | | - Iryna Saranchova
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Lonna Munro
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Cheryl G Pfeifer
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Brett A Eyford
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Suresh Kari
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada
| | - Emmanuel Garrovillas
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Giorgia Caspani
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Eliana Al Haddad
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | | | - Tunc Morova
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada
| | - Nathan A Lack
- Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,School of Medicine, Koç University, Istanbul, Türkiye
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | | | - Wilfred A Jefferies
- Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.,Vancouver Prostate Centre, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada.,The Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, Canada.,Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada.,Department of Zoology, University of British Columbia, Vancouver, BC, Canada.,Department of Urological Science, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
19
|
Kishimoto T, Mioka T, Itoh E, Williams DE, Andersen RJ, Tanaka K. Phospholipid flippases and Sfk1 are essential for the retention of ergosterol in the plasma membrane. Mol Biol Cell 2021; 32:1374-1392. [PMID: 34038161 PMCID: PMC8694040 DOI: 10.1091/mbc.e20-11-0699] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 05/18/2021] [Accepted: 05/21/2021] [Indexed: 11/17/2022] Open
Abstract
Sterols are important lipid components of the plasma membrane (PM) in eukaryotic cells, but it is unknown how the PM retains sterols at a high concentration. Phospholipids are asymmetrically distributed in the PM, and phospholipid flippases play an important role in generating this phospholipid asymmetry. Here, we provide evidence that phospholipid flippases are essential for retaining ergosterol in the PM of yeast. A mutant in three flippases, Dnf1-Lem3, Dnf2-Lem3, and Dnf3-Crf1, and a membrane protein, Sfk1, showed a severe growth defect. We recently identified Sfk1 as a PM protein involved in phospholipid asymmetry. The PM of this mutant showed high permeability and low density. Staining with the sterol probe filipin and the expression of a sterol biosensor revealed that ergosterol was not retained in the PM. Instead, ergosterol accumulated in an esterified form in lipid droplets. We propose that ergosterol is retained in the PM by the asymmetrical distribution of phospholipids and the action of Sfk1. Once phospholipid asymmetry is severely disrupted, sterols might be exposed on the cytoplasmic leaflet of the PM and actively transported to the endoplasmic reticulum by sterol transfer proteins.
Collapse
Affiliation(s)
- Takuma Kishimoto
- Division of Molecular Interaction, Institute for Genetic Medicine, Hokkaido University Graduate School of Life Science, Sapporo, Hokkaido 060-0815, Japan
| | - Tetsuo Mioka
- Division of Molecular Interaction, Institute for Genetic Medicine, Hokkaido University Graduate School of Life Science, Sapporo, Hokkaido 060-0815, Japan
| | - Eriko Itoh
- Division of Molecular Interaction, Institute for Genetic Medicine, Hokkaido University Graduate School of Life Science, Sapporo, Hokkaido 060-0815, Japan
| | - David E. Williams
- Departments of Chemistry and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Raymond J. Andersen
- Departments of Chemistry and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Kazuma Tanaka
- Division of Molecular Interaction, Institute for Genetic Medicine, Hokkaido University Graduate School of Life Science, Sapporo, Hokkaido 060-0815, Japan
| |
Collapse
|
20
|
Chaiyosang B, Kanokmedhakul K, Yodsing N, Boonlue S, Yang JX, Wang YA, Andersen RJ, Yahuafai J, Kanokmedhakul S. Three new indole diterpenoids from Aspergillus aculeatus KKU-CT2. Nat Prod Res 2021; 36:4973-4981. [PMID: 34096406 DOI: 10.1080/14786419.2021.1914613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Three new indole diterpenoids, aculeatupenes A-C (1-3), together with four known compounds (4-7), were isolated from the mycelium of Aspergillus aculeatus KKU-CT2. Their structures were established by spectroscopic evidence and absolute configurations of 1-3 were determined by comparison of their experimental and calculated ECD spectra. Compounds 1, 2, and emindole SB (4) showed weak cytotoxicity against HelaS3, KB, HepG2, MCF-7, and A549 cancer cell lines with IC50 values in the range of 11.12-67.81 μM. Compound 3 showed weak cytotoxicity against HelaS3 cell lines with an IC50 value of 17.48 μM but non-cytotoxicity against Vero cell line. In addition, compound 1 exhibited weak antibacterial activity against Bacillus cereus.
Collapse
Affiliation(s)
- Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Natanong Yodsing
- Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima, Thailand
| | - Sophon Boonlue
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Jian-Xiong Yang
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Yan Alexander Wang
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Jantana Yahuafai
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok, Thailand
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| |
Collapse
|
21
|
Molina L, Williams DE, Andersen RJ, Golsteyn RM. Isolation of a natural product with anti-mitotic activity from a toxic Canadian prairie plant. Heliyon 2021; 7:e07131. [PMID: 34095597 PMCID: PMC8167235 DOI: 10.1016/j.heliyon.2021.e07131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/09/2021] [Accepted: 05/19/2021] [Indexed: 11/18/2022] Open
Abstract
We are investigating plants from the prairie ecological zone of Canada to identify natural products that inhibit mitosis in cancer cells. Investigation of plant parts from the Canadian plant species Hymenoxys richardsonii (Asteraceae) revealed that leaf extracts (PP-360A) had anti-mitotic activity on human cancer cell lines. Cells treated with leaf extracts acquired a rounded morphology, similar to that of cells in mitosis. We demonstrated that the rounded cells contained mitotic spindles and phospho-histone H3 using the techniques of immunofluorescence microscopy. By biology-guided fractionation of H. richardsonii leaves, we isolated a sesquiterpene lactone named hymenoratin, which had not been previously assigned a biological activity. Cells treated with hymenoratin have phospho-histone H3 positive chromosomes, a mitotic spindle, and enter a prolonged mitotic arrest in which the spindles become distorted. By Western blot analysis, hymenoratin treated cells acquire high levels of cyclin B and dephosphorylated Cdk1. There is a growing body of evidence that select members of the sesquiterpene lactone chemical family have anti-mitotic activity.
Collapse
Affiliation(s)
- Layla Molina
- Natural Product and Cancer Cell Laboratories, University of Lethbridge, Lethbridge, AB, T1K 3M4 Canada
| | - David E Williams
- Department of Earth, Ocean, Atmospheric Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4 Canada
| | - Raymond J Andersen
- Department of Earth, Ocean, Atmospheric Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4 Canada
| | - Roy M Golsteyn
- Natural Product and Cancer Cell Laboratories, University of Lethbridge, Lethbridge, AB, T1K 3M4 Canada
| |
Collapse
|
22
|
Yan L, Banuelos CA, Mawji NR, Patrick BO, Sadar MD, Andersen RJ. Structure-Activity Relationships for the Marine Natural Product Sintokamides: Androgen Receptor N-Terminus Antagonists of Interest for Treatment of Metastatic Castration-Resistant Prostate Cancer. J Nat Prod 2021; 84:797-813. [PMID: 33124806 PMCID: PMC8802828 DOI: 10.1021/acs.jnatprod.0c00921] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Synthetic analogues of the marine natural product sintokamides have been prepared in order to investigate the structure-activity relationships for the androgen receptor N-terminal domain (AR NTD) antagonist activity of the sintokamide scaffold. An in vitro LNCaP cell-based transcriptional activity assay with an androgen-driven luciferase (Luc) reporter was used to monitor the potency of analogues. The data have shown that the chlorine atoms on the leucine side chains are essential for potent activity. Analogues missing the nonchlorinated methyl groups of the leucine side chains (C-1 and C-17) are just as active and in some cases more active than the natural products. Analogues with the natural R configuration at C-10 and the unnatural R configuration at C-4 are most potent. Replacing the natural propionamide N-terminus cap with the more sterically hindered pivaloylamide N-terminus cap leads to enhanced potency. The tetramic acid fragment and the methyl ether on the tetramic acid fragment are essential for activity. The SAR optimized analogue 76 is more selective, easier to synthesize, more potent, and presumed to be more resistant to proteolysis than the natural sintokamides.
Collapse
Affiliation(s)
- Luping Yan
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
- Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Carmen A. Banuelos
- Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada V5Z 1L3 and Departments of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z7
| | - Nasrin R. Mawji
- Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada V5Z 1L3 and Departments of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z7
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Marianne D. Sadar
- Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada V5Z 1L3 and Departments of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z7
| | - Raymond J. Andersen
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
- Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| |
Collapse
|
23
|
Tuescher JM, Beck CR, Spencer L, Yeremy B, Shi Y, Andersen RJ, Golsteyn RM. Extracts Prepared from a Canadian Toxic Plant Induce Light-Dependent Perinuclear Vacuoles in Human Cells. Toxins (Basel) 2021; 13:toxins13020138. [PMID: 33673235 PMCID: PMC7917763 DOI: 10.3390/toxins13020138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 11/16/2022] Open
Abstract
Abstract We are investigating plant species from the Canadian prairie ecological zone by phenotypic cell assays to discover toxins of biological interest. We provide the first report of the effects of extracts prepared from the shrub Symphoricarpos occidentalis in several human cell lines. S. occidentalis (Caprifoliaceae) extracts are cytotoxic, and, strikingly, treated cells undergo light-dependent vacuolation near the nucleus. The range of irradiation is present in standard ambient light and lies in the visible range (400-700 nm). Vacuolization in treated cells can be induced with specific wavelengths of 408 or 660 nm at 1 J/cm2 energies. Vacuolated cells show a striking phenotype of a large perinuclear vacuole (nuclear associated vacuole, NAV) that is distinct from vesicles observed by treatment with an autophagy-inducing agent. Treatment with S. occidentalis extracts and light induces an intense lamin A/C signal at the junction of a nuclear vacuole and the nucleus. Further study of S. occidentalis extracts and vacuolation provide chemical tools that may contribute to the understanding of nuclear envelope organization and human cell biology. Key Contribution We provide the first description of the biological effects upon human cells of extracts from the toxic plant, Symphoricarpos occidentalis. Treated cells acquire striking nuclear associated vacuoles (NAVs), rarely observed in animal cell biology.
Collapse
Affiliation(s)
- Jan M. Tuescher
- Natural Product and Cancer Cell Laboratories, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; (J.M.T); (C.R.B)
| | - Chad R. Beck
- Natural Product and Cancer Cell Laboratories, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; (J.M.T); (C.R.B)
| | - Locke Spencer
- Department of Physics and Astronomy, University of Lethbridge, Lethbridge AB T1K 3M4, Canada;
| | - Benjamin Yeremy
- Department of Earth, Ocean, Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; (B.Y.); (Y.S.); (R.J.A.)
| | - Yutong Shi
- Department of Earth, Ocean, Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; (B.Y.); (Y.S.); (R.J.A.)
| | - Raymond J. Andersen
- Department of Earth, Ocean, Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; (B.Y.); (Y.S.); (R.J.A.)
| | - Roy M. Golsteyn
- Natural Product and Cancer Cell Laboratories, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; (J.M.T); (C.R.B)
- Correspondence:
| |
Collapse
|
24
|
Suthiphasilp V, Maneerat T, Duangyod T, Charoensup R, Andersen RJ, Pyne SG, Laphookhieo S. Polyoxygenated seco-cyclohexenes derivatives from flower and leaf extracts of Desmos cochinchinensis and their α-glucosidase inhibitory activity. Heliyon 2020; 6:e05791. [PMID: 33385090 PMCID: PMC7772550 DOI: 10.1016/j.heliyon.2020.e05791] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 09/02/2020] [Accepted: 12/16/2020] [Indexed: 12/20/2022] Open
Abstract
Phytochemical investigations from the flower and leaf extracts of D. cochinchinensis resulted in the isolation and structural elucidation of five new polyoxygenated seco-cyclohexene derivatives, desmoscochinchinenes A-E (1–5), together with 11 known compounds (6–16). The structures on the new compounds were elucidated from their spectroscopic data, including UV, IR, NMR, and HRESITOFMS. Some of the isolated compounds were evaluated for their α-glucosidase inhibitory activities. Chrysin (9), pinocembrin 7-O-benzoate (12), and (−)-(5R)-desmoscochinoxepinone B (16) inhibited α-glucosidase better than the standard control (acarbose, IC50 = 83.5 μM) with IC50 values of 5.7, 33.8, 53.3 μM, respectively.
Collapse
Affiliation(s)
- Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Tharakorn Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Thidarat Duangyod
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai, 57100, Thailand
- School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai, 57100, Thailand
- School of Integrative Medicine, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Raymond J. Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036, Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Stephen G. Pyne
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai, 57100, Thailand
- Corresponding author.
| |
Collapse
|
25
|
Centko RM, Carlile GW, Barne I, Patrick BO, Blagojevic P, Thomas DY, Andersen RJ. Combination of Selective PARP3 and PARP16 Inhibitory Analogues of Latonduine A Corrects F508del-CFTR Trafficking. ACS Omega 2020; 5:25593-25604. [PMID: 33073085 PMCID: PMC7557227 DOI: 10.1021/acsomega.0c02467] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
The marine natural product latonduine A (1) shows F508del-cystic fibrosis transmembrane regulator (CFTR) corrector activity in cell-based assays. Pull-down experiments, enzyme inhibition assays, and siRNA knockdown experiments suggest that the F508del-CFTR corrector activities of latonduine A and a synthetic analogue MCG315 (4) result from simultaneous inhibition of PARP3 and PARP16. A library of synthetic latonduine A analogs has been prepared in an attempt to separate the PARP3 and PARP16 inhibitory properties of latonduine A with the goal of discovering selective small-molecule PARP3 and PARP16 inhibitory cell biology tools that could confirm the proposed dual-target F508del-CFTR corrector mechanism of action. The structure activity relationship (SAR) study reported herein has resulted in the discovery of the modestly potent (IC50 3.1 μM) PARP3 selective inhibitor (±)-5-hydroxy-4-phenyl-2,3,4,5-tetrahydro-1H-benzo[c]azepin-1-one (5) that shows 96-fold greater potency for inhibition of PARP3 compared with its inhibition of PARP16 in vitro and the potent (IC50 0.362 μM) PARP16 selective inhibitor (±)-7,8-dichloro-5-hydroxy-4-(pyridin-2-yl)-2,3,4,5-tetrahydro-1H-benzo[c]azepin-1-one (6) that shows 205-fold selectivity for PARP16 compared with PARP3 in vitro. At 1 or 10 μM, neither 5 or 6 alone showed F508del-CFTR corrector activity, but when added together at 1 or 10 μM each, the combination exhibited F508del-CFTR corrector activity identical to 1 or 10 μM latonduine A (1), respectively, supporting its novel dual PARP target mechanism of action. Latonduine A (1) showed additive in vitro corrector activity in combination with the clinically approved corrector VX809, making it a potential new partner for cystic fibrosis combination drug therapies.
Collapse
Affiliation(s)
- Ryan M. Centko
- Department
of Chemistry and Department of Earth, Ocean & Atmospheric
Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T1Z1
| | - Graeme W. Carlile
- Departments
of Biochemistry and Human Genetics and The Cystic Fibrosis Translational
Research Centre, McGill University, Montréal, Québec, Canada H3G 1Y6
| | - Isabel Barne
- Department
of Chemistry and Department of Earth, Ocean & Atmospheric
Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T1Z1
| | - Brian O. Patrick
- Department
of Chemistry and Department of Earth, Ocean & Atmospheric
Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T1Z1
| | - Polina Blagojevic
- Department
of Chemistry and Department of Earth, Ocean & Atmospheric
Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T1Z1
| | - David Y. Thomas
- Departments
of Biochemistry and Human Genetics and The Cystic Fibrosis Translational
Research Centre, McGill University, Montréal, Québec, Canada H3G 1Y6
| | - Raymond J. Andersen
- Department
of Chemistry and Department of Earth, Ocean & Atmospheric
Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T1Z1
| |
Collapse
|
26
|
Tantapakul C, Chaiyosang B, Promgool T, Somteds A, Suthiphasilp V, Kanokmedhakul K, Laphookhieo S, Andersen RJ, Patrick BO, Kanokmedhakul S. Spirosteroids and α-glucosidase inhibitory norlignans from Asparagus racemosus Willd. roots. Phytochemistry 2020; 177:112439. [PMID: 32562917 DOI: 10.1016/j.phytochem.2020.112439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/07/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Three undescribed spirosteroids, asparacemosones A-C, an undescribed spiro-21-norsteroid, asparacemosone D, along with seven known compounds were isolated from Thai herbal plant Asparagus racemosus Willd. roots. Their structures were elucidated by spectroscopic analysis including NMR, UV, IR and mass spectrometry. The absolute configurations of asparacemosones A, B, and D were determined by single crystal X-ray diffraction using CuKα radiation. Among the isolated compounds, the norlignan nyasol and three acetylenic norlignans demonstrated potent α-glucosidase inhibition, with IC50 values ranging from 0.003 to 0.004 μM which is 5 × 104 fold more potent than the standard acarbose.
Collapse
Affiliation(s)
- Cholpisut Tantapakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand; The Research Unit of Natural Product Utilization, School of Science, Walailak University, Thasala, Nakhon Si Thammarat, 80161, Thailand
| | - Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Trinop Promgool
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Apisara Somteds
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Tasud, Muang, Chiang Rai, 57100, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Tasud, Muang, Chiang Rai, 57100, Thailand
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada; Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
| |
Collapse
|
27
|
Hong NH, Moigne RL, Banuelos CA, Mawji NR, Tam T, Wang J, Andersen RJ, Cesano A, Sadar MD, Zhou HJ, Virsik P. Abstract 1953: Pre-clinical development of the second-generation N-terminal domain androgen receptor inhibitor, EPI-7386, for the treatment of prostate cancer. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-1953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The vast majority of metastatic castration-resistant prostate cancers (mCRPC) progress with rising prostate-specific antigen, underlying a persistent dependence on the androgen receptor (AR) pathway. Despite standard of care treatment targeting the AR axis, anti-androgen resistance inevitably arise and involve mechanisms including AR gene amplification, ligand-binding domain (LBD) mutations and expression of constitutively active AR splice variants lacking the LBD (e.g. AR-V7). Selective inhibition of the N-terminal domain (NTD) of the AR can inhibit its transcriptional activity even in the presence of LBD-driven resistance. EPI-7386 is a potent and stable second generation NTD inhibitor (Aniten) currently in preclinical development. The efficacy, safety profile and distinct mechanism of action of this molecule in LBD inhibitor resistant CRPC models will be presented.
Methods: EPI-7386 potency was assessed using reporter cellular models, or viability assays in a variety of cell lines, expressing or not the AR. Pharmacodynamic markers of activity in AR full length or AR-V7 driven models was determined by qPCR or RNAseq. The stability and selectivity of the molecule were characterized with screening and functional assays, while safety was assessed in specific IND enabling studies.
Results: EPI-7386 has an IC50 of 421 nM in LNCaP reporter assays, a similar range to the most active LBD inhibitors, but contrary to these drugs, antitumor activity was maintained in models of CRPC expressing AR-V7. As expected, no activity was observed in non-AR driven models. EPI-7386 can inhibit effectively the expression of AR full length driven genes (PSA, FKBP5 or STEAP4), but can also modulate the expression of genes driven by AR V7, including UBE2C or B4GALT1. Additionally, EPI-7386 also demonstrated remarkable activity in several models in vivo, including a CRPC patient derived xenograft (PDX) resistant to enzalutamide (ENZ). Interestingly, RNAseq analysis showed on target activity, but with a different transcriptomic profile than ENZ, which suggests that the combination of both LBD and NTD AR inhibition could provide more robust and thorough inhibition of the AR-pathway. The enhanced activity of such combination was confirmed in vivo in the CRPC model VCaP. IND-enabling studies demonstrated on target activity, and well-tolerated profile for EPI-7386, supporting an IND filing in 1Q 2020. Early clinical development plans including efficacy endpoints will be presented.
Conclusions: The second generation aniten compound EPI-7386 is more active and metabolically stable than EPI-506. It has a favorable safety and ADME profile, with predicted long half-life in human, supporting once daily dose. In vivo, EPI-7386 demonstrated potential as a single agent in overcoming anti-androgen clinical resistance as well as in combination therapy. The clinical strategy supporting the development of this new generation of aniten will be discussed.
Citation Format: Nan Hyung Hong, Ronan Le Moigne, C. Adriana Banuelos, Nasrin R. Mawji, Teresa Tam, Jun Wang, Raymond J. Andersen, Alessandra Cesano, Marianne D. Sadar, Han-Jie Zhou, Peter Virsik. Pre-clinical development of the second-generation N-terminal domain androgen receptor inhibitor, EPI-7386, for the treatment of prostate cancer [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 1953.
Collapse
Affiliation(s)
| | | | | | | | - Teresa Tam
- 2BC Cancer Agency, Vancouver, British Columbia, Canada
| | - Jun Wang
- 2BC Cancer Agency, Vancouver, British Columbia, Canada
| | | | | | | | - Han-Jie Zhou
- 1ESSA Pharmaceuticals Inc, South San Francisco, CA
| | - Peter Virsik
- 1ESSA Pharmaceuticals Inc, South San Francisco, CA
| |
Collapse
|
28
|
Hirayama Y, Tam T, Jian K, Andersen RJ, Sadar MD. Combination therapy with androgen receptor N-terminal domain antagonist EPI-7170 and enzalutamide yields synergistic activity in AR-V7-positive prostate cancer. Mol Oncol 2020; 14:2455-2470. [PMID: 32734688 PMCID: PMC7530779 DOI: 10.1002/1878-0261.12770] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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: 04/20/2020] [Revised: 07/08/2020] [Accepted: 07/23/2020] [Indexed: 11/09/2022] Open
Abstract
Resistance of castration-resistant prostate cancer (CRPC) to enzalutamide and abiraterone involves the expression of constitutively active, truncated androgen receptor (AR) splice variants (AR-Vs) that lack a C-terminal ligand-binding domain (LBD). Both full-length AR and truncated AR-Vs require a functional N-terminal domain (NTD) for transcriptional activity thereby providing rationale for the development of ralaniten (EPI-002) as a first-in-class antagonist of the AR-NTD. Here, we evaluated the antitumor effect of a next-generation analog of ralaniten (EPI-7170) as a monotherapy or in combination with enzalutamide in prostate cancer cells that express AR-V7 that were resistant to enzalutamide. EPI-7170 had 8-9 times improved potency compared to ralaniten. Enzalutamide increased levels of AR-V7 and expression of its target genes. Knockdown of AR-V7 restored sensitivity to enzalutamide, indicating a role for AR-V7 in the mechanism of resistance. EPI-7170 inhibited expression of genes transcriptionally regulated by full-length AR and AR-V7. A combination of EPI-7170 and enzalutamide resulted in synergistic inhibition of proliferation of enzalutamide-resistant cells that was consistent with results from cell cycle and clonogenic assays. In addition, this drug enhanced the antitumor effect of enzalutamide in enzalutamide-resistant CRPC preclinical models. Thus, a combination therapy targeting both the NTD and LBD of AR, and thereby blocking both full-length AR and AR-Vs, has potential for the treatment of enzalutamide-resistant CRPC.
Collapse
Affiliation(s)
| | - Teresa Tam
- Genome Sciences Centre, BC Cancer, Vancouver, BC, Canada
| | - Kunzhong Jian
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada.,Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada.,Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Marianne D Sadar
- Genome Sciences Centre, BC Cancer, Vancouver, BC, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
29
|
Chamberlain TC, Cheung ST, Yoon JSJ, Ming-Lum A, Gardill BR, Shakibakho S, Dzananovic E, Ban F, Samiea A, Jawanda K, Priatel J, Krystal G, Ong CJ, Cherkasov A, Andersen RJ, McKenna SA, Van Petegem F, Mui ALF. Interleukin-10 and Small Molecule SHIP1 Allosteric Regulators Trigger Anti-inflammatory Effects through SHIP1/STAT3 Complexes. iScience 2020; 23:101433. [PMID: 32823063 PMCID: PMC7452241 DOI: 10.1016/j.isci.2020.101433] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 04/23/2019] [Revised: 07/07/2020] [Accepted: 07/31/2020] [Indexed: 12/12/2022] Open
Abstract
The anti-inflammatory actions of interleukin-10 (IL10) are thought to be mediated primarily by the STAT3 transcription factor, but pro-inflammatory cytokines such as interleukin-6 (IL6) also act through STAT3. We now report that IL10, but not IL6 signaling, induces formation of a complex between STAT3 and the inositol polyphosphate-5-phosphatase SHIP1 in macrophages. Both SHIP1 and STAT3 translocate to the nucleus in macrophages. Remarkably, sesquiterpenes of the Pelorol family, which we previously described as allosteric activators of SHIP1 phosphatase activity, could induce SHIP1/STAT3 complex formation in cells and mimic the anti-inflammatory action of IL10 in a mouse model of colitis. Using crystallography and docking studies we identified a drug-binding pocket in SHIP1. Our studies reveal new mechanisms of action for both STAT3 and SHIP1 and provide a rationale for use of allosteric SHIP1-activating compounds, which mimic the beneficial anti-inflammatory actions of IL10. Video Abstract
Loss of normal interleukin-10 (IL10) function results in inflammatory diseases IL10 or SHIP1 agonists induce formation of SHIP1/STAT3 complexes SHIP1 Y190 phosphorylation is required for SHIP1/STAT3 complex formation SHIP1 agonists mimic IL10 anti-inflammatory action in a mouse model of colitis
Collapse
Affiliation(s)
- Thomas C Chamberlain
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Sylvia T Cheung
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Jeff S J Yoon
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Andrew Ming-Lum
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Bernd R Gardill
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Soroush Shakibakho
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Edis Dzananovic
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Fuqiang Ban
- Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Abrar Samiea
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Kamaldeep Jawanda
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - John Priatel
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Gerald Krystal
- British Columbia Cancer Research Centre, Vancouver, BC V5Z 1L3, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Christopher J Ong
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Artem Cherkasov
- Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, Canada
| | - Sean A McKenna
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Filip Van Petegem
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Alice L-F Mui
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada.
| |
Collapse
|
30
|
Banuelos CA, Ito Y, Obst JK, Mawji NR, Wang J, Hirayama Y, Leung JK, Tam T, Tien AH, Andersen RJ, Sadar MD. Ralaniten Sensitizes Enzalutamide-Resistant Prostate Cancer to Ionizing Radiation in Prostate Cancer Cells that Express Androgen Receptor Splice Variants. Cancers (Basel) 2020; 12:cancers12071991. [PMID: 32708219 PMCID: PMC7409302 DOI: 10.3390/cancers12071991] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/12/2020] [Accepted: 07/17/2020] [Indexed: 12/13/2022] Open
Abstract
Blocking androgen receptor (AR) transcriptional activity by androgen deprivation therapy (ADT) improves the response to radiotherapy for intermediate and high risk prostate cancer. Unfortunately, ADT, antiandrogens, and abiraterone increase expression of constitutively active splice variants of AR (AR-Vs) which regulate DNA damage repair leading to resistance to radiotherapy. Here we investigate whether blocking the transcriptional activities of full-length AR and AR-Vs with ralaniten leads to enhanced sensitivity to radiotherapy. Combination therapies using ralaniten with ionizing radiation were evaluated for effects on proliferation, colony formation, cell cycle, DNA damage, and Western blot analyses in human prostate cancer cells that express both full-length AR and AR-Vs. Ralaniten and a potent next-generation analog (EPI-7170) decreased expression of DNA repair genes whereas enzalutamide had no effect. FACS analysis revealed a dose-dependent decrease of BrdU incorporation with increased accumulation of γH2AX with a combination of ionizing radiation with ralaniten. An additive inhibitory effect on proliferation of enzalutamide-resistant cells was achieved with a combination of ralaniten compounds with ionizing radiation. Ralaniten and EPI-7170 sensitized prostate cancer cells that express full-length AR and AR-Vs to radiotherapy whereas enzalutamide had no added benefit.
Collapse
Affiliation(s)
- Carmen A. Banuelos
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Yusuke Ito
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Jon K. Obst
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Nasrin R. Mawji
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Jun Wang
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Yukiyoshi Hirayama
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Jacky K. Leung
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Teresa Tam
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Amy H. Tien
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
| | - Raymond J. Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada;
| | - Marianne D. Sadar
- Department of Genome Sciences, British Columbia Cancer, 675 West 10th Avenue, Vancouver, BC V5Z 1L3, Canada; (C.A.B.); (Y.I.); (J.K.O.); (N.R.M.); (J.W.); (Y.H.); (J.K.L.); (T.T.); (A.H.T.)
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T 1Z7, Canada
- Correspondence: ; Tel.: +604-675-8157; Fax: +604-675-8178
| |
Collapse
|
31
|
Morgan KD, Williams DE, Patrick BO, Remigy M, Banuelos CA, Sadar MD, Ryan KS, Andersen RJ. Incarnatapeptins A and B, Nonribosomal Peptides Discovered Using Genome Mining and 1H/ 15N HSQC-TOCSY. Org Lett 2020; 22:4053-4057. [PMID: 32283033 DOI: 10.1021/acs.orglett.0c00818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methods for the focused isolation of low-abundance natural products with specific chemical substructures could expand known bioactive chemical diversity for drug discovery. Here we report the combined use of genome mining and an 15N NMR-based screening method for the targeted isolation of the low-abundance piperazic-acid-containing peptides incarnatapeptins A (1) and B (3). Incarnatapeptin B (3) shows in vitro cytotoxicity to LNCaP prostate cancer cells.
Collapse
Affiliation(s)
| | | | | | | | - Carmen A Banuelos
- Department of Genome Sciences, BC Cancer, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Marianne D Sadar
- Department of Genome Sciences, BC Cancer, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | | | | |
Collapse
|
32
|
Abstract
Covering: 2000 to 2019The discovery of new natural products that have some combination of unprecedented chemical structures, biological activities of therapeutic interest for urgent medical needs, and new molecular targets provides the fuel that sustains the vitality of natural products chemistry research. Unfortunately, finding these important new compounds is neither routine or trivial and a major challenge is finding effective discovery paradigms. This review presents examples that illustrate the effectiveness of a chemical genetics approach to marine natural product (MNP) discovery that intertwines compound discovery, molecular target identification, and phenotypic response/biological activity. The examples include MNPs that have complex unprecedented structures, new or understudied molecular targets, and potent biological activities of therapeutic interest. A variety of methods to identify molecular targets are also featured.
Collapse
Affiliation(s)
- David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
| | | |
Collapse
|
33
|
Ratnaweera PB, M Jayasundara JMN, Herath HHMSD, Williams DE, Rajapaksha SU, Nishantha KMDWP, de Silva ED, Andersen RJ. Antifeedant, contact toxicity and oviposition deterrent effects of phyllostine acetate and phyllostine isolated from the endophytic fungus Diaporthe miriciae against Plutella xylostella larvae. Pest Manag Sci 2020; 76:1541-1548. [PMID: 31696600 DOI: 10.1002/ps.5673] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 11/01/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Larvae of the diamond back moth (DBM), Plutella xylostella, are destructive cabbage pests causing economic losses worldwide. Continuous application of synthetic pesticides to control this pest has resulted in environmental pollution and resistant pest strains. Thus, there is a crucial need to seek natural alternatives with minimal detrimental effects. This study was designed to investigate the antifeedant activities of endophytic fungi of Cyperus iria and to determine the antifeedant, contact toxicity and oviposition deterrent activities of phyllostine acetate and phyllostine of the endophytic Diaporthe miriciae fungus. RESULTS Two cyclohexeneoxidediones, phyllostine acetate (1) and phyllostine (2), isolated from an ethyl acetate extract of D. miriciae exhibited strong antifeedant, contact toxicity, and oviposition deterrent activities against P. xylostella. Phyllostine acetate (1) and phyllostine (2) showed feeding deterrent indexes of 100% at 50 μg cm-2 in the no-choice leaf disc assay and 50% feeding deterrence (DC50 ) values of 9 and 4.7 μg cm-2 respectively. The median lethal concentration (LC50 ) values of phyllostine acetate (1) and phyllostine (2) were 4.38 and 6.54 μg/larva in the contact toxicity assay. The oviposition deterrent indexes of the two compounds were 100% for phyllostine acetate (1) and 28.6% for phyllostine (2) at 50 μg cm-2 . CONCLUSION Phyllostine acetate and phyllostine show promise as compounds for the control of P. xylostella. This study encourages further investigation of endophytic fungi of the family Cyperacea, for the development of natural pest control agents in agriculture. © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Pamoda B Ratnaweera
- Department of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka
| | | | | | - David E Williams
- Departments of Chemistry and Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, Canada
| | - Sasini U Rajapaksha
- Department of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka
| | - K M D W Prabath Nishantha
- Horticultural Crop Research Development Institute (HORDI), Department of Agriculture, Gannoruwa, Peradeniya, Sri Lanka
| | - E Dilip de Silva
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, Colombo, Sri Lanka
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, Canada
| |
Collapse
|
34
|
Suthiphasilp V, Maneerat W, Rujanapun N, Duangyod T, Charoensup R, Deachathai S, Andersen RJ, Patrick BO, Pyne SG, Laphookhieo S. α-Glucosidase inhibitory and nitric oxide production inhibitory activities of alkaloids isolated from a twig extract of Polyalthia cinnamomea. Bioorg Med Chem 2020; 28:115462. [PMID: 32247751 DOI: 10.1016/j.bmc.2020.115462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/18/2020] [Accepted: 03/22/2020] [Indexed: 12/22/2022]
Abstract
The first phytochemical investigation of Polyalthia cinnamomea led to the isolation and identification of two new oxoprotoberberine alkaloids, (-)-(13aS)-polyalthiacinnamines A and B, together with eleven known compounds. The structures of the new compounds were elucidated by extensive spectroscopic methods. The absolute configuration of miliusacunine E and consanguine B was established by X-ray diffraction analysis using Cu Kα radiation and ECD spectra, whereas the absolute configurations of polyalthiacinnamines A and B were established by comparison of their ECD spectra and specific rotations with those of miliusacunine E and consanguine B. Compounds 1-4, 6, and 8 exhibited α-glucosidase inhibitory activities (IC50 values ranging from 11.3 to 57.9 µM) better than a positive control (acarbose, IC50 83.5 μM). Compound 2 also exhibited NO production inhibitory activity with an IC50 value of 24.4 μM (indomethacin, a positive control, IC50 = 32.2 μM).
Collapse
Affiliation(s)
- Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Wisanu Maneerat
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand; Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Narawadee Rujanapun
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Thidarat Duangyod
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Rawiwan Charoensup
- Medicinal Plants Innovation Center of Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Integrative Medicine, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Suwanna Deachathai
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Brian O Patrick
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) and School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
| |
Collapse
|
35
|
Meesakul P, Jaidee W, Richardson C, Andersen RJ, Patrick BO, Willis AC, Muanprasat C, Wang J, Lei X, Hadsadee S, Jungsuttiwong S, Pyne SG, Laphookhieo S. Styryllactones from Goniothalamus tamirensis. Phytochemistry 2020; 171:112248. [PMID: 31918304 DOI: 10.1016/j.phytochem.2019.112248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 12/21/2019] [Accepted: 12/22/2019] [Indexed: 06/10/2023]
Abstract
The phytochemical investigation of the twig and leaf extracts of Goniothalamus tamirensis led to the isolation and identification of 15 compounds including three rare previously undescribed styryllactones, goniotamirenones A-C, together with 12 known compounds. (Z)-6-Styryl-5,6-dihydro-2-pyranone and 5-(1-hydroxy-3-phenyl-allyl)-dihydro-furan-2-one are reported here for the first time as previously undescribed natural products. Their structures were elucidated by spectroscopic methods. Goniotamirenone A was synthesized via a [2 + 2] cycloaddition reaction of 6-styrrylpyran-2-one in quantitative yield. The absolute configurations of goniotamirenones B and C were identified from experimental and calculated ECD data, while the absolute configurations of (-)-5-acetoxygoniothalamin, (-)-isoaltholactone, parvistone E, and 5-(1-hydroxy-3-phenyl-allyl)-dihydro-furan-2-one were identified by single-crystal X-ray diffraction analysis using Cu Kα radiation. The absolute configurations of the other related compounds were determined from comparisons of their ECD spectra with relevant compounds reported in the literature. (-)-5-Acetoxygoniothalamin exhibited potent cytotoxicity against the colon cancer cell line (HCT116) with an IC50 value of 8.6 μM which was better than the standard control (doxorubicin, IC50 = 9.7 μM), while (Z)-6-styryl-5,6-dihydro-2-pyranone was less active with an IC50 value of 22.1 μM.
Collapse
Affiliation(s)
- Pornphimol Meesakul
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand; School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia
| | - Wuttichai Jaidee
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Christopher Richardson
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Brian O Patrick
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Anthony C Willis
- Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
| | - Chatchai Muanprasat
- Division of Preclinical Sciences, Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangpli, Samutprakarn, 10540, Thailand; Excellent Center of Drug Discovery, Faculty of Science, Mahidol University, Rajathevi, Bangkok, 10400, Thailand
| | - Jin Wang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xiaoguang Lei
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China; Peking-Tsinghua Center for Life Science, Peking University, Beijing, 100871, China
| | - Sarinya Hadsadee
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Siriporn Jungsuttiwong
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia.
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai, 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand.
| |
Collapse
|
36
|
Sahile HA, Rens C, Shapira T, Andersen RJ, Av-Gay Y. DMN-Tre Labeling for Detection and High-Content Screening of Compounds against Intracellular Mycobacteria. ACS Omega 2020; 5:3661-3669. [PMID: 32118181 PMCID: PMC7045496 DOI: 10.1021/acsomega.9b04173] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/05/2020] [Indexed: 05/19/2023]
Abstract
4-N,N-Dimethylamino-1,8-naphthalimide conjugate of trehalose (DMN-Tre) is a fluorogenic dye recently developed as a diagnostic tool for tuberculosis. DMN-Tre selectively labels the mycobacterial cell wall through the Ag85 enzymes. In this work, we disclose a protocol describing the total synthesis of DMN-Tre with more than 99% purity. We further developed a protocol for in vitro and intercellular labeling of various mycobacterial strains. DMN-Tre labeling was found to be a useful tool to study in vitro and intracellular Mycobacterium tuberculosis (Mtb) physiology and as an end-point readout system in high-content image-based screening (HCS) of drug molecules. Such uses of DMN-Tre labeling provide a simple, fast, and cheap alternative to the existing, time-consuming approach that requires Mtb strains to be genetically transformed with fluorescent reporter genes.
Collapse
Affiliation(s)
- Henok A. Sahile
- Division
of Infectious Diseases, Department of Medicine and Department of Microbiology and
Immunology, Life Sciences Institute, University
of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Celine Rens
- Division
of Infectious Diseases, Department of Medicine and Department of Microbiology and
Immunology, Life Sciences Institute, University
of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Tirosh Shapira
- Division
of Infectious Diseases, Department of Medicine and Department of Microbiology and
Immunology, Life Sciences Institute, University
of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Raymond J. Andersen
- Department of Earth, Ocean and Atmospheric
Sciences, Faculty of Science, University
of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Yossef Av-Gay
- Division
of Infectious Diseases, Department of Medicine and Department of Microbiology and
Immunology, Life Sciences Institute, University
of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia, Canada V6T 1Z3
- E-mail:
| |
Collapse
|
37
|
Le Moigne R, Banuelos CA, Mawji NR, Tam T, Wang J, Jian K, Andersen RJ, Cesano A, Sadar M, Zhou HJ, Virsik P. IND candidate EPI-7386 as an N-terminal domain androgen receptor inhibitor in development for the treatment of prostate cancer. J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.6_suppl.142] [Citation(s) in RCA: 3] [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] [Indexed: 11/20/2022] Open
Abstract
142 Background: The androgen receptor (AR) pathway drives most metastatic castration-resistant prostate cancers (mCRPC) even in late stages of the disease. Anti-androgen resistance mechanisms include AR gene amplification, C-terminal ligand-binding domain (LBD) mutations and expression of constitutively active AR splice variants lacking the LBD (e.g. AR-V7). Selective inhibition of the N-terminal domain (NTD) of the AR can inhibit its’ transcriptional activity even in the presence of LBD-driven resistance. In a phase I trial, the first-generation AR NTD inhibitor (aniten) EPI-002, demonstrated minor PSA declines in mCRPC patients. The efficacy and safety profile of second generation aniten IND-candidate EPI-7386 will be presented. Methods: Novel aniten chemical structures were developed to increase molecule potency using a wide variety of CRPC models. Similarly, the stability and selectivity of the molecule were characterized with screening and functional assays. IND-enabling studies further support the compounds’ safety profile. Results: EPI-7386 demonstrated a 20-fold improvement in AR-driven cellular potency compared to EPI-002, while being highly stable in human hepatocytes and across animal species. In vitro proliferation assays demonstrated on-target activity across a panel of prostate cancer cell lines, with activity in AR-V7-driven cellular models. EPI-7386 was able to induce tumor regression in CRPC xenografts and show superiority to enzalutamide (ENZ) in ENZ resistant models. In addition, the combination of ENZ with EPI-7386 demonstrated a more robust antitumor response. IND-enabling studies demonstrate a safe and well-tolerated profile supporting an IND filing in 1Q 2020. Pharmacodynamic markers specific to anitens will be presented, in addition to early clinical development plans. Conclusions: The next generation aniten compound EPI-7386 is more active and metabolically stable than EPI-002. It demonstrated potential as a single agent in overcoming anti-androgen clinical resistance as well as in combination therapy in earlier stages of the disease. The clinical strategy supporting the development of this new generation of aniten will be discussed.
Collapse
Affiliation(s)
| | - C. Adriana Banuelos
- Department of Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Nasrin R. Mawji
- Department of Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Teresa Tam
- Department of Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Jun Wang
- Department of Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Kunzhong Jian
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | - Raymond J. Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | | | - Marianne Sadar
- Department of Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | | | | |
Collapse
|
38
|
Raksat A, Phukhatmuen P, Yang J, Maneerat W, Charoensup R, Andersen RJ, Wang YA, Pyne SG, Laphookhieo S. Phloroglucinol Benzophenones and Xanthones from the Leaves of Garcinia cowa and Their Nitric Oxide Production and α-Glucosidase Inhibitory Activities. J Nat Prod 2020; 83:164-168. [PMID: 31860303 DOI: 10.1021/acs.jnatprod.9b00849] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Five new compounds-two phloroglucinol benzophenones, garciniacowones F (1) and G (2), and three xanthones, garciniacowones H (3), I (4), and J (5)-together with seven known xanthones (6-12) were isolated from the fresh leaves of Garcinia cowa. Their structures were elucidated by detailed analysis of NMR and MS data. Compounds 1 and 2 are phloroglucinol benzophenones containing a polyprenylated bicyclo[3.3.1]nonane ring system, while compounds 3-5 are rare xanthones having farnesyl (3 and 5) and geranylgeranyl (5) units at C-8. Compounds 1, 3, 4, 7, 8, and 10 exhibited inhibitory effects on NO production in LPS-induced RAW264.7 macrophage cells with IC50 values ranging from 5.4 to 18.6 μM. Compounds 4 and 8 had α-glucosidase inhibitory activities with IC50 values of 15.4 and 11.4 μM, respectively, which were more potent than that of the acarbose control.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | | |
Collapse
|
39
|
Moigne RL, Banuelos CA, Mawji NR, Tam T, Wang J, Jian K, Andersen RJ, Cesano A, Sadar MD, Zhou HJ, Virsik P. Abstract B117: Treatment of castrated resistant prostate cancer with EPI-7386, a second generation N-terminal domain androgen receptor inhibitor. Mol Cancer Ther 2019. [DOI: 10.1158/1535-7163.targ-19-b117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The androgen receptor (AR) pathway drives most metastatic castration-resistant prostate cancers (mCRPC) even in late stages of the disease and resistance to ligand binding domain (LBD)-linked therapies inevitably emerges. Mechanisms of resistance to anti-androgens include AR gene amplification, C-terminal ligand-binding domain (LBD) mutations and expression of constitutively-active truncated AR splice variants lacking the LBD (e.g. AR-V7). Inhibition of the N-terminal domain (NTD) of the AR can inhibit transcriptional activity even in the presence of LBD-driven resistance. A Phase I clinical trial of the first-generation AR NTD inhibitor, EPI-506, demonstrated minor PSA declines in anti-androgen refractory mCRPC patients, revealing the need for more potent and metabolically stable NTD inhibitors. EPI-7386 represents a second generation of NTD inhibitors (Anitens) that are more active and more metabolically stable than EPI-506. Methods: Chemical structure activity relationships were explored to increase molecule potency while maintaining target specificity using a wide variety of CRPC models in vivo and in vitro. The stability and selectivity of the molecules were characterized with a panel of selective screening and functional assays. The mechanism of action and pathway engagement markers were followed by qPCR and RNAseq. Results: EPI-7386 was chosen as the IND candidate. The molecule demonstrated a 20-fold improvement in AR-driven cellular potency compared to EPI-002, while being highly stable in human and animal hepatocytes. In vitro proliferation assays demonstrated on-target activity across a panel of prostate cancer cell lines, with activity demonstrated in AR-V7-driven cellular models. The antiproliferative effect correlated with the inhibitory effect on AR driven genes, including specifically AR-V7 driven genes such as UBE2C. EPI-7386 controlled tumor growth and induced tumor regressions in several CRPC xenografts, including AR-V7-driven 22Rv1 and enzalutamide resistant LNCaP95 models, as well as the VCaP model. Importantly, the combination of enzalutamide with EPI-7386 demonstrated a more robust and consistent PSA and antitumor response in the VCaP model. EPI-7386 was well tolerated in animal models, and therapeutic levels could be achieved without displaying signs of toxicity in a 14-day rat study. Pharmacodynamic markers will be presented, in addition to their incorporation in the future clinical plan. Conclusions: The next generation aniten compound EPI-7386 is more active and metabolically stable than EPI-506. It shows on-target activity in AR full length and AR-V7 driven models, and demonstrates a high therapeutic index in preclinical models. As a single agent, EPI-7386 may overcome anti-androgen clinical resistance in advanced mCRPC as well as potentially in combination therapy with anti-androgens in earlier stages of the disease. The clinical strategy supporting the development of this Aniten N-terminal domain inhibitor of AR will be discussed.
Citation Format: Ronan Le Moigne, C. Adriana Banuelos, Nasrin R Mawji, Teresa Tam, Jun Wang, Kunzhong Jian, Raymond J Andersen, Alessandra Cesano, Marianne D Sadar, Han-Jie Zhou, Peter Virsik. Treatment of castrated resistant prostate cancer with EPI-7386, a second generation N-terminal domain androgen receptor inhibitor [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics; 2019 Oct 26-30; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2019;18(12 Suppl):Abstract nr B117. doi:10.1158/1535-7163.TARG-19-B117
Collapse
Affiliation(s)
| | | | | | | | - Jun Wang
- 2BC Cancer Agency, Vancouver, BC
| | | | | | | | | | - Han-Jie Zhou
- 1ESSA Pharmaceuticals Inc, South San Francisco, CA
| | - Peter Virsik
- 1ESSA Pharmaceuticals Inc, South San Francisco, CA
| |
Collapse
|
40
|
Suthiphasilp V, Maneerat W, Andersen RJ, Phukhatmuen P, Pyne SG, Laphookhieo S. Dasymaschalolactams A-E, Aristolactams from a Twig Extract of Dasymaschalon dasymaschalum. J Nat Prod 2019; 82:3176-3180. [PMID: 31661271 DOI: 10.1021/acs.jnatprod.9b00506] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Five new aristolactam alkaloids (1-5), dasymaschalolactams A-E, and the first isolation of dasymaschalolactone (17) as a natural product, together with 19 known compounds (6-16 and 18-25) were isolated from the twig extract of Dasymaschalon dasymaschalum. Their structures were elucidated by spectroscopic methods as well as comparisons made from the literature. Compounds 20 and 21 showed α-glucosidase inhibitory activities with IC50 values of 4.5 and 24.7 μM, respectively.
Collapse
Affiliation(s)
| | | | - Raymond J Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences , University of British Columbia , 2036 Main Mall , Vancouver , BC , Canada V6T 1Z1
| | | | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | | |
Collapse
|
41
|
Obst JK, Wang J, Jian K, Williams DE, Tien AH, Mawji N, Tam T, Yang YC, Andersen RJ, Chi KN, Montgomery B, Sadar MD. Revealing Metabolic Liabilities of Ralaniten To Enhance Novel Androgen Receptor Targeted Therapies. ACS Pharmacol Transl Sci 2019; 2:453-467. [PMID: 32259077 DOI: 10.1021/acsptsci.9b00065] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Indexed: 12/15/2022]
Abstract
Inhibition of the androgen receptor (AR) is the mainstay treatment for advanced prostate cancer. Ralaniten (formally EPI-002) prevents AR transcriptional activity by binding to its N-terminal domain (NTD) which is essential for transcriptional activity. Ralaniten acetate (EPI-506) the triacetate pro-drug of ralaniten, remains the only AR-NTD inhibitor to have entered clinical trials (NCT02606123). While well tolerated, the trial was ultimately terminated due to poor pharmacokinetic properties and resulting pill burden. Here we discovered that ralaniten was glucuronidated which resulted in decreased potency. Long-term treatment of prostate cancer cells with ralaniten results in upregulation of UGT2B enzymes with concomitant loss of potency. This has proven to be a useful model with which to facilitate the development of more potent second-generation AR-NTD inhibitors. Glucuronidated metabolites of ralaniten were also detected in the serum of patients in Phase 1 clinical trials. Therefore, we tested an analogue of ralaniten (EPI-045) which was resistant to glucuronidation and demonstrated superiority to ralaniten in our resistant model. These data support that analogues of ralaniten designed to mitigate glucuronidation may optimize clinical responses to AR-NTD inhibitors.
Collapse
Affiliation(s)
- Jon K Obst
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, 2211 Westbrook Mall, Vancouver, British Columbia V6T 2B5, Canada
| | - Jun Wang
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Kunzhong Jian
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2306 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2306 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Amy H Tien
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Nasrin Mawji
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Teresa Tam
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Yu Chi Yang
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2306 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kim N Chi
- BC Cancer Agency, 600 West 10th Avenue, Vancouver, British Columbia V5Z 4E6, Canada
| | - Bruce Montgomery
- University of Washington, 1959 NE Pacific Street, Seattle, Washington 98195, United States
| | - Marianne D Sadar
- Department of Genome Sciences Centre, BC Cancer Research Centre, 675 W 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, 2211 Westbrook Mall, Vancouver, British Columbia V6T 2B5, Canada
| |
Collapse
|
42
|
Suthiphasilp V, Maneerat W, Andersen RJ, Patrick BO, Phukhatmuen P, Pyne SG, Laphookhieo S. Uvarialuridols A-C, three new polyoxygenated cyclohexenes from the twig and leaf extracts of Uvaria lurida. Fitoterapia 2019; 138:104340. [PMID: 31465816 DOI: 10.1016/j.fitote.2019.104340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/20/2019] [Accepted: 08/25/2019] [Indexed: 12/12/2022]
Abstract
The first phytochemical investigation of Uvaria lurida resulted in the isolation and identification of three new polyoxygenated cyclohexenes, (+)-(1R,2S,3R,6S)-uvarialuridols A-C (1-3), together with 10 known compounds (4-13). All new structures were elucidated by spectroscopic methods and HRESIMS. The absolute configurations of compounds 1 and 5 were confirmed by X-ray diffraction analysis using Cu Kα radiation. The absolute configurations of compounds 2-4 were identified from comparisons of their specific rotations and ECD spectra with those of known compounds. Compound 11 showed α-glucosidase inhibitory activity with an IC50 value of 30 μM which was better than the standard control, acarbose (74 μM) whereas, compound 10 exhibited nitric oxide (NO) production inhibitory activity with an IC50 value of 37 μM.
Collapse
Affiliation(s)
- Virayu Suthiphasilp
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Wisanu Maneerat
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Raymond J Andersen
- Department of Chemistry, Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Brian O Patrick
- Department of Chemistry, Department of Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Piyaporn Phukhatmuen
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Stephen G Pyne
- School of Chemistry and Molecular Biosciences, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
| |
Collapse
|
43
|
Medina RP, Araujo AR, Batista JM, Cardoso CL, Seidl C, Vilela AFL, Domingos HV, Costa-Lotufo LV, Andersen RJ, Silva DHS. Botryane terpenoids produced by Nemania bipapillata, an endophytic fungus isolated from red alga Asparagopsis taxiformis - Falkenbergia stage. Sci Rep 2019; 9:12318. [PMID: 31444403 PMCID: PMC6707159 DOI: 10.1038/s41598-019-48655-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 09/26/2018] [Accepted: 08/08/2019] [Indexed: 01/01/2023] Open
Abstract
A chemical study of the EtOAc extract of Nemania bipapillata (AT-05), an endophytic fungus isolated from the marine red alga Asparagopsis taxiformis - Falkenbergia stage, led to the isolation of five new botryane sesquiterpenes, including the diastereomeric pair (+)-(2R,4S,5R,8S)-(1) and (+)-(2R,4R,5R,8S)-4-deacetyl-5-hydroxy-botryenalol (2), (+)-(2R,4S,5R,8R)-4-deacetyl-botryenalol (3), one pair of diastereomeric botryane norsesquiterpenes bearing an unprecedented degraded carbon skeleton, (+)-(2R,4R,8R)-(4) and (+)-(2R,4S,8S)-(5), which were named nemenonediol A and nemenonediol B, respectively, in addition to the known 4β-acetoxy-9β,10β,15α-trihydroxyprobotrydial (6). Their structures were elucidated using 1D and 2D NMR, HRESIMS and comparison with literature data of similar known compounds. The absolute configurations of 2, 3 and 4 were deduced by comparison of experimental and calculated electronic circular dichroism (ECD) spectra, while those of 1 and 5 were assigned from vibrational circular dichroism (VCD) data. Compound 4 weakly inhibited acetylcholinesterase, whereas compound 1 inhibited both acetylcholinesterase and butyrylcholinesterase. Compounds 1, 3, 5 and 6 were tested against two carcinoma cell lines (MCF-7 and HCT-116), but showed no significant citotoxicity at tested concentrations (IC50 > 50 µM).
Collapse
Affiliation(s)
- Rebeca P Medina
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, UNESP - Universidade Estadual Paulista, 14801-970, Araraquara-SP, Brazil
| | - Angela R Araujo
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, UNESP - Universidade Estadual Paulista, 14801-970, Araraquara-SP, Brazil
| | - João M Batista
- Departamento de Química, Centro de Ciências Exatas e de Tecnologia, Universidade Federal de São Carlos - UFSCar, 13565-905, São Carlos-SP, Brazil.,Departamento de Ciência e Tecnologia, Universidade Federal de São Paulo -UNIFESP, 12231-280, São José dos Campos-SP, Brazil
| | - Carmen L Cardoso
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brazil
| | - Cláudia Seidl
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brazil
| | - Adriana F L Vilela
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais, Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brazil
| | - Helori V Domingos
- Instituto de Ciências Biomédicas, Universidade de São Paulo, 05508-900, São Paulo-SP, Brazil
| | - Leticia V Costa-Lotufo
- Instituto de Ciências Biomédicas, Universidade de São Paulo, 05508-900, São Paulo-SP, Brazil
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, V6T 1Z1, Vancouver, BC, Canada
| | - Dulce H S Silva
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, UNESP - Universidade Estadual Paulista, 14801-970, Araraquara-SP, Brazil.
| |
Collapse
|
44
|
Raksat A, Maneerat W, Rujanapun N, Andersen RJ, Pyne SG, Laphookhieo S. Antibacterial and Inhibitory Activities against Nitric Oxide Production of Coumaronochromones and Prenylated Isoflavones from Millettia extensa. J Nat Prod 2019; 82:2343-2348. [PMID: 31403786 DOI: 10.1021/acs.jnatprod.9b00216] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A chemical investigation of leaf and root extracts of Millettia extensa led to the isolation and structural elucidation of four new prenylated isoflavones, millexatins G-J (1-4), and three new coumaronochromones, millexatins K-M (5-7), along with 16 known compounds. The structures of the new compounds were determined on the basis of NMR and MS data. Compound 4 is a rare isoflavone having a 2-hydroxyethyl moiety at C-8, whereas the structures of compounds 5-7 formally arise from a ring closure through HO-2' and C-2. The absolute configurations at the C-2 and C-3 positions of 5 and 6 were determined from their ECD spectra through comparison with those of previously reported compounds. Most of compounds were evaluated for their inhibitory effects against nitric oxide (NO) production on RAW264.7 macrophages and their antibacterial activities. Compounds 18 and 19 inhibited NO production with IC50 values of 8.5 and 14.3 μM, respectively. Compounds 13 and 14 showed antibacterial activity against various Gram-positive bacteria with MIC values ranging from 2 to 8 μg/mL.
Collapse
Affiliation(s)
- Achara Raksat
- Center of Chemical Innovation for Sustainability (CIS) , Mae Fah Luang University , Chiang Rai 57100 , Thailand
- School of Science , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| | - Wisanu Maneerat
- Center of Chemical Innovation for Sustainability (CIS) , Mae Fah Luang University , Chiang Rai 57100 , Thailand
- School of Science , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| | - Narawadee Rujanapun
- Center of Excellence in Medicinal Plants and Thai Traditional Medicine , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| | - Raymond J Andersen
- Department of Chemistry and Department of Earth, Ocean & Atmospheric Sciences , University of British Columbia , 2036 Main Mall , Vancouver , BC , Canada V6T 1Z1
| | - Stephen G Pyne
- School of Chemistry and Molecular Biosciences , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS) , Mae Fah Luang University , Chiang Rai 57100 , Thailand
- School of Science , Mae Fah Luang University , Chiang Rai 57100 , Thailand
| |
Collapse
|
45
|
Cheenpracha S, Pyne SG, Patrick BO, Andersen RJ, Maneerat W, Laphookhieo S. Mallopenins A-E, Antibacterial Phenolic Derivatives from the Fruits of Mallotus philippensis. J Nat Prod 2019; 82:2174-2180. [PMID: 31318550 DOI: 10.1021/acs.jnatprod.9b00182] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The chromatographic separation of the components of the acetone extract of Mallotus philippensis fruits yielded five new phenolic compounds including two chalcones, 1 and 3, a functionalized phloroglucinol, 2, two flavanones, 4 and 5, and six known compounds. The structures of 1-5 were confirmed by NMR and mass analyses. Racemic compounds 1 and 2 were separated by chiral-phase HPLC, and the absolute configuration of (+)-1 was confirmed by X-ray diffraction studies and ECD spectroscopic data. The configurations of the enantiomers of 2 were defined by comparison of its ECD data with those of (+)-1. Compounds 6 and 7 exhibited significant antibacterial activities, with MIC values ranging from 3.8 to 15.5 μM.
Collapse
Affiliation(s)
- Sarot Cheenpracha
- Division of Chemistry, School of Science , University of Phayao , Phayao 56000 , Thailand
| | - Stephen G Pyne
- School of Chemistry and Molecular Biosciences , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | - Brian O Patrick
- Department of Chemistry and Earth, Ocean & Atmospheric Sciences , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia , Canada V6T 1Z1
| | - Raymond J Andersen
- Department of Chemistry and Earth, Ocean & Atmospheric Sciences , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia , Canada V6T 1Z1
| | | | | |
Collapse
|
46
|
Raksat A, Maneerat W, Andersen RJ, Pyne SG, Laphookhieo S. A tocotrienol quinone dimer and xanthones from the leaf extract of Garcinia nigrolineata. Fitoterapia 2019; 136:104175. [DOI: 10.1016/j.fitote.2019.104175] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 05/11/2019] [Accepted: 05/11/2019] [Indexed: 01/18/2023]
|
47
|
Juckmeta T, Pipatrattanaseree W, Jaidee W, Dechayont B, Chunthorng-Orn J, Andersen RJ, Itharat A. Cytotoxicity to Five Cancer Cell Lines of the Respiratory Tract System and Anti-inflammatory Activity of Thai Traditional Remedy. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19845815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A Thai traditional remedy called Benchalokawichian (BLW) consists of 5 plant species, Ficus racemosa, Capparis micracantha, Clerodendrum petasites, Harrisonia perforata, and Tiliacora triandra. It has long been used in Thai traditional medicine to reduce fever in respiratory tract infection, but there is no report on either cytotoxicity against cancer cell lines of the respiratory tract system or anti-inflammatory effect. Thus, the objectives of this research were to investigate the cytotoxic activity of the ethanolic and water extracts of BLW, its single plant ingredients and its isolated compounds against 5 cancer cell lines of the respiratory tract, by SRB assay. Anti-inflammatory activity of all extracts and compounds was also tested by using lipopolysaccharide-induced nitric oxide (NO) in RAW 264.7 cells. The main compounds were isolated by high-performance liquid chromatography and compared with BLW and plant ingredients. A major compound of BLW and H. perforata ethanolic extracts is perforatic acid, which inhibited the growth of 2 lung cancer cell lines, A549 and H226, with IC50 values of 6.7 and 13.2 µg/mL. The ethanolic extract of BLW and T. triandra showed cytotoxic activity against all cancer cell lines with IC50 values in the range of 10.1 to 45.2 µg/mL. In contrast, all EtOH extracts showed moderate anti-inflammatory activity, but the water extract had no inhibitory effect on either activity. Pectolinarigenin and O-methyllaloptaeroxyrin, 2 minor compounds, exhibited NO inhibitory effect with IC50 values of 7.1 and 7.9 µg/mL, respectively, whereas perforatic acid was inactive (>50 µg/mL). Moreover, pectolinarigenin showed high cytotoxic activity against all cancer cell lines of the respiratory system with IC50 values in the range of 1.9 to 9.1 µg/mL. As a result, these 2 minor compounds can be used as markers for quality control of BLW for anti-inflammatory activity. Perforatic acid and pectolinarigenin are of interest for further study on their cytotoxic mechanism. Remarkably, T. triandra, one of the plant components of BLW, is possibly the source of the active cytotoxic compounds.
Collapse
Affiliation(s)
- Thana Juckmeta
- Department of Applied Thai Traditional Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Weerachai Pipatrattanaseree
- Department of Applied Thai Traditional Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Wuttichai Jaidee
- Center of Chemical Innovation for Sustainability (CIS), Mae Fah Luang University, Tasud, Muang, Chiang Rai, Thailand
- School of Science, Mae Fah Luang University, Tasud, Muang, Chiang Rai, Thailand
| | - Bhanuz Dechayont
- Department of Applied Thai Traditional Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Jitpisute Chunthorng-Orn
- Department of Applied Thai Traditional Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Raymond J. Andersen
- Department of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, Vancouver, Canada
| | - Arunporn Itharat
- Department of Applied Thai Traditional Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
- Center of Excellence on Applied Thai Traditional Medicine Research (CEATMR), Thammasat University, Pathumthani, Thailand
| |
Collapse
|
48
|
de Oliveira JAM, Williams DE, Andersen RJ, Sarragiotto MH, Baldoqui DC. Mycenolide A, new butenolide from a marine sediment-derived bacterium Streptomyces sp. 4054. Nat Prod Res 2019; 34:1-4. [PMID: 30964338 DOI: 10.1080/14786419.2019.1597351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 12/15/2018] [Revised: 03/04/2019] [Accepted: 03/14/2019] [Indexed: 10/27/2022]
Abstract
Streptomyces sp. 4054, isolated from marine sediments, produced a new butenolide, mycenolide A (1), along with five known butenolide derivatives (2-6). The structures of the compounds were established based on 1D- and 2D-NMR spectroscopic analysis, circular dichroism, and mass spectrometry data. The antimicrobial activity of the crude extract of the marine bacteria Streptomyces sp. 4054 was evaluated, showing good results against Bacillus subtilis and MRSA.
Collapse
Affiliation(s)
- Josiane A Monteiro de Oliveira
- a Departamento de Química , Universidade Estadual de Maringá , Maringá , Paraná , Brazil
- b Department of Chemistry and Earth, Ocean and Atmospheric Sciences , University of British Columbia , Vancouver , BC , Canada
| | - David E Williams
- b Department of Chemistry and Earth, Ocean and Atmospheric Sciences , University of British Columbia , Vancouver , BC , Canada
| | - Raymond J Andersen
- b Department of Chemistry and Earth, Ocean and Atmospheric Sciences , University of British Columbia , Vancouver , BC , Canada
| | - Maria H Sarragiotto
- a Departamento de Química , Universidade Estadual de Maringá , Maringá , Paraná , Brazil
| | - Debora C Baldoqui
- a Departamento de Química , Universidade Estadual de Maringá , Maringá , Paraná , Brazil
| |
Collapse
|
49
|
Steinberger J, Robert F, Hallé M, Williams DE, Cencic R, Sawhney N, Pelletier D, Williams P, Igarashi Y, Porco JA, Rodriguez AD, Kopp B, Bachmann B, Andersen RJ, Pelletier J. Tracing MYC Expression for Small Molecule Discovery. Cell Chem Biol 2019; 26:699-710.e6. [PMID: 30880156 DOI: 10.1016/j.chembiol.2019.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/19/2018] [Accepted: 02/07/2019] [Indexed: 12/16/2022]
Abstract
Our inability to effectively "drug" targets such as MYC for therapeutic purposes requires the development of new approaches. We report on the implementation of a phenotype-based assay for monitoring MYC expression in multiple myeloma cells. The open reading frame (ORF) encoding an unstable variant of GFP was engineered immediately downstream of the MYC ORF using CRISPR/Cas9, resulting in co-expression of both proteins from the endogenous MYC locus. Using fluorescence readout as a surrogate for MYC expression, we implemented a pilot screen in which ∼10,000 compounds were prosecuted. Among known MYC expression inhibitors, we identified cardiac glycosides and cytoskeletal disruptors to be quite potent. We demonstrate the power of CRISPR/Cas9 engineering in establishing phenotype-based assays to identify gene expression modulators.
Collapse
Affiliation(s)
- Jutta Steinberger
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Francis Robert
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Maxime Hallé
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - David E Williams
- Departments of Chemistry and Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Regina Cencic
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Neha Sawhney
- Vanderbilt Institute of Chemical Biology, Department of Chemistry, Vanderbilt University, Nashville, 37235, USA
| | - Dylan Pelletier
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Philip Williams
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - Yasuhiro Igarashi
- Biotechnology Research Center, Toyama Prefectural University, Toyama 939-0398, Japan
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, Boston, MA 02215, USA
| | - Abimael D Rodriguez
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, USA
| | - Brigitte Kopp
- Department of Pharmacognosy, University of Vienna, Vienna, Austria
| | - Brian Bachmann
- Vanderbilt Institute of Chemical Biology, Department of Chemistry, Vanderbilt University, Nashville, 37235, USA
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montreal, QC H3G 1Y6, Canada; The Rosalind and Morris Goodman Cancer Research Center and the Department of Oncology, McGill University, Montreal, QC, Canada.
| |
Collapse
|
50
|
Le Moigne R, Zhou HJ, Mawji NR, Banuelos CA, Wang J, Jian K, Virsik P, Andersen RJ, Sadar M. Next generation N-terminal domain androgen receptor inhibitors with improved potency and metabolic stability in castration-resistant prostate cancer models. J Clin Oncol 2019. [DOI: 10.1200/jco.2019.37.7_suppl.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
220 Background: EPI-506, pro-drug of EPI-002, was a first-in-class oral small molecule from the Aniten family of compounds, which inhibit androgen receptor (AR) activity by binding to the N-terminal domain of the AR. EPI-506 was tested in a Phase 1 study in men with metastatic castration-resistant prostate cancer (mCRPC) resistant to current therapies and demonstrated a favorable tolerability profile with signs of moderate efficacy. Metabolic vulnerabilities in the chemical scaffold of EPI-506 were identified and new Aniten molecules, EPI-7170 and EPI-7245 , with improved potency, metabolic stability and pharmaceutical properties have been generated. Methods: Chemical structure activity relationships were developed in order to increase molecule potency in cellular and in vivo assays, while metabolic stability improvements were assessed in in vitro ADME assays and in animal pharmacokinetic studies. In addition, the on-target activity and selectivity was also optimized using a variety of cellular experiments. Results: Next generation Anitens demonstrated a 10-20 fold improvement on AR-driven cellular potency, with IC50’s of 0.5-1 uM when compared to 10-12 uM for EPI-002. In vitro proliferation assays demonstrated on target activity, with an IC50 ~ 2 uM in LNCaP and > 10 uM in the AR-independent cell model PC-3. EPI-7170 was also active in AR-V7-driven LNCaP95 cells. The antiproliferative effect was in alignment with the inhibitory effect on a subset of AR driven genes. In vivo activity in castrated mice bearing LNCaP tumors showed tumor growth inhibition of approximately 70%. While EPI-7170 represents a major advance, subsequent chemistry efforts led to the generation of EPI-7245 and other next generation Anitens which exhibit IC50’s < 500 nM and favorable ADME and PK profiles. Conclusions: Promising next-generation Aniten compounds have been identified. Major chemistry efforts led to the identification of several Anitens with > 10-20 fold improvements in cellular potency compared to EPI-506 which are also metabolically stable. IND-selection preclinical studies are underway on the most promising Aniten’s with an IND submission planned shortly.
Collapse
Affiliation(s)
| | | | - Nasrin R Mawji
- Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | | | - Jun Wang
- Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Kunzhong Jian
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | | | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | - Marianne Sadar
- Genome Sciences Centre, BC Cancer Agency, Vancouver, BC, Canada
| |
Collapse
|