1
|
Hanna RD, Naro Y, Deiters A, Floreancig PE. Potent and Readily Accessible Bistramide A Analogues through Diverted Total Synthesis. Chemistry 2018; 24:16271-16275. [DOI: 10.1002/chem.201804417] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Ramsey D. Hanna
- Department of Chemistry University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Yuta Naro
- Department of Chemistry University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Alexander Deiters
- Department of Chemistry University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Paul E. Floreancig
- Department of Chemistry University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| |
Collapse
|
2
|
(-)-Gochnatiolide B, synthesized from dehydrocostuslactone, exhibits potent anti-bladder cancer activity in vitro and in vivo. Sci Rep 2018; 8:8807. [PMID: 29891980 PMCID: PMC5995859 DOI: 10.1038/s41598-018-27036-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 05/17/2018] [Indexed: 02/07/2023] Open
Abstract
With limited success achieved in bladder cancer patient management, novel agents are in urgent need for the purpose of therapy and prevention. As a sesquiterpenoid dimmer isolated from Gochnatia pomculat, (−)-gochnatiolide B has been bio-mimetically synthesized in multiple steps with a poor yield, which heavily limited the further research and clinical application. Herein, (−)-gochnatiolide B was synthesized beginning with dehydrocostuslactone in four steps with a total yield of 26%. MTT assays showed that (−)-gochnatiolide B inhibited the growth of vast majority of human cancer cells especially bladder cancer cells. Mechanistically, (−)-gochnatiolide B induced the increased expression of pro-apoptotic proteins and the decreased expression of anti-apoptosis proteins and further resulted in apoptosis of T24 cells. (−)-Gochnatiolide B induced G1 arrest which associated with SKP2 downregulation, leading to p27/Kip1 accumulation and downregulation of cyclin D1 in T24 cells. Furthermore, in vivo studies showed that (−)-gochnatiolide B remarkably inhibited tumor growth by 81% compared with vehicle control. Taken together, (−)-gochnatiolide B exhibits inhibitory activity against bladder cancer cells both in vitro and in vivo by inducing apoptosis, which suggests that (−)-gochnatiolide B could be an important candidate compound for prevention and treatment of bladder cancer.
Collapse
|
3
|
Pan S, Jang SY, Wang D, Liew SS, Li Z, Lee JS, Yao SQ. A Suite of “Minimalist” Photo-Crosslinkers for Live-Cell Imaging and Chemical Proteomics: Case Study with BRD4 Inhibitors. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706076] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sijun Pan
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Se-Young Jang
- Molecular Recognition Research Center; Bio-Med Program of KIST-School UST; Korea Institute of Science & Technology; Hwarangno 14-gil 5, Seongbuk-gu Seoul 136-791 Korea
| | - Danyang Wang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Si Si Liew
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Zhengqiu Li
- College of Pharmacy; Jinan University; Guangzhou 510632 China
| | - Jun-Seok Lee
- Molecular Recognition Research Center; Bio-Med Program of KIST-School UST; Korea Institute of Science & Technology; Hwarangno 14-gil 5, Seongbuk-gu Seoul 136-791 Korea
| | - Shao Q. Yao
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| |
Collapse
|
4
|
Pan S, Jang SY, Wang D, Liew SS, Li Z, Lee JS, Yao SQ. A Suite of "Minimalist" Photo-Crosslinkers for Live-Cell Imaging and Chemical Proteomics: Case Study with BRD4 Inhibitors. Angew Chem Int Ed Engl 2017; 56:11816-11821. [PMID: 28783236 DOI: 10.1002/anie.201706076] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/28/2017] [Indexed: 11/08/2022]
Abstract
Affinity-based probes (AfBPs) provide a powerful tool for large-scale chemoproteomic studies of drug-target interactions. The development of high-quality probes capable of recapitulating genuine drug-target engagement, however, could be challenging. "Minimalist" photo-crosslinkers, which contain an alkyl diazirine group and a chemically tractable tag, could alleviate such challenges, but few are currently available. Herein, we have developed new alkyl diazirine-containing photo-crosslinkers with different bioorthogonal tags. They were subsequently used to create a suite of AfBPs based on GW841819X (a small molecule inhibitor of BRD4). Through in vitro and in situ studies under conditions that emulated native drug-target interactions, we have obtained better insights into how a tag might affect the probe's performance. Finally, SILAC-based chemoproteomic studies have led to the discovery of a novel off-target, APEX1. Further studies showed GW841819X binds to APEX1 and caused up-regulation of endogenous DNMT1 expression under normoxia conditions.
Collapse
Affiliation(s)
- Sijun Pan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Se-Young Jang
- Molecular Recognition Research Center, Bio-Med Program of KIST-School UST, Korea Institute of Science & Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Korea
| | - Danyang Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Si Si Liew
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Zhengqiu Li
- College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Jun-Seok Lee
- Molecular Recognition Research Center, Bio-Med Program of KIST-School UST, Korea Institute of Science & Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Korea
| | - Shao Q Yao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| |
Collapse
|