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Old 03-26-2021, 09:13 AM   #1
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SR9009 induces a REV-ERB dependent anti-small-cell lung cancer effect

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Theranostics 2020; 10(10):4466-4480. doi:10.7150/thno.42478

Research Paper
SR9009 induces a REV-ERB dependent anti-small-cell lung cancer effect through inhibition of autophagy

Weitao Shen1#, Wei Zhang1#, Weilin Ye1#, Haihong Wang2, Qingxi Zhang3, Jie Shen1, Qingsha Hong4, Xiang Li5, Ge Wen6, Ting Wei1 Corresponding address, Jian Zhang1 Corresponding address

1. Department of Oncology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510282, Guangdong, People's Republic of China.
2. Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China.
3. The Second School of Clinical Medicine, Southern Medical University, No.1023, South Shatai Road, Baiyun District, Guangzhou, 510515, Guangdong, People's Republic of China.
4. Department of Obstetrics & Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, People's Republic of China.
5. Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue, Guangzhou, 510282, Guangdong, People's Republic of China.
6. Department of Research, Bioillus technology Co.Ltd, Guangzhou 510631, Guangdong, People's Republic of China.
#These authors contributed equally to this work.
This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). See http://ivyspring.com/terms for full terms and conditions.
Citation:
Shen W, Zhang W, Ye W, Wang H, Zhang Q, Shen J, Hong Q, Li X, Wen G, Wei T, Zhang J. SR9009 induces a REV-ERB dependent anti-small-cell lung cancer effect through inhibition of autophagy. Theranostics 2020; 10(10):4466-4480. doi:10.7150/thno.42478. Available from https://www.thno.org/v10p4466.htm

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Abstract

Rationale: The circadian clock coordinates cell proliferation and metabolism and impacts the progression of some diseases, particularly cancer. Pharmacological modulation of the circadian machinery may be an effective therapeutic approach for treating cancer. SR9009 is a specific synthetic agonist of the REV-ERBs, essential circadian clock components. However, the potential efficacy and antitumor mechanism of this drug in small-cell lung cancer (SCLC) remains poorly understood.

Methods: Here, we used chemosensitive cells (H69 and H446) and the corresponding chemoresistant cells (H69AR and H446DDP) to assess the efficacy of the REV-ERB agonist SR9009 for the treatment of SCLC in vitro and further validated the antitumor effect in subcutaneous tumor models of SCLC. Then, we determined whether REV-ERBα was correlated with the anti-SCLC effect of SR9009. Chromatin immunoprecipitation (ChIP) sequencing assays were conducted to identify potential DNA sequences directly regulated by REV-ERBα. Autophagy regulation by REV-ERBα and its possible mechanism in SR9009-based SCLC therapy were analyzed.

Results: Here, we showed that the REV-ERB agonist SR9009 is specifically lethal to both chemosensitive and chemoresistant SCLC cells. REV-ERBα was involved in the antitumor effect of SR9009 in SCLC. The core autophagy gene Atg5 was identified as a direct downstream target of REV-ERBα and was suppressed by the REV-ERB agonist SR9009 in SCLC. Furthermore, the interaction of REV-ERBα with this autophagy gene impaired autophagy activity, leading to SR9009 cytotoxicity in SCLC cells.

Principal conclusions: Our study provided a novel viewpoint indicating that the REV-ERB agonist SR9009 could be a novel and promising therapeutic strategy in first- or second-line SCLC treatment. The anti-SCLC effect of SR9009 is mediated by REV-ERB dependent suppression of autophagy via direct repression of the autophagy gene Atg5.

Keywords: small cell lung cancer, circadian clock component, SR9009, REV-ERB, autophagy
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Old 04-02-2021, 12:26 PM   #2
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I got curious about this and did some googling on REV-ERB and this protein does a lot of good shit for us bodybuilders. Not just circadian rhythm but glucose regulation and cell differentiation and a lot more. SR9009 being an agonist of this protien looks rather beneficial on paper. Anyone tried this stuff? What’s the suggested dose? And does it matter when you take it?
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Old 04-02-2021, 12:36 PM   #3
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I got curious about this and did some googling on REV-ERB and this protein does a lot of good shit for us bodybuilders. Not just circadian rhythm but glucose regulation and cell differentiation and a lot more. SR9009 being an agonist of this protien looks rather beneficial on paper. Anyone tried this stuff? What’s the suggested dose? And does it matter when you take it?
I plan on starting soon. From what I have seen the suggested dose is 20-30 mgs Ed in divided doses because of its 4 hour half life. I will start with 20 mgs.
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Old 04-02-2021, 04:35 PM   #4
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I plan on starting soon. From what I have seen the suggested dose is 20-30 mgs Ed in divided doses because of its 4 hour half life. I will start with 20 mgs.
Cool! Let us know what you think of it. I have a hell of a time on the weekends waking up early. I get up at 4:30am on weekdays and only get 6hours sleep if I’m lucky. So that’s probably why I’m so tired on Saturday. But I wonder if this would help somehow. I usually feel tired all day too. I do have sleep apnea which I use cpap for. But still feel tired most days and I’m prescribed modifinal but try to take it only when I really need it. Wonder if this may help. What are you hoping to get out of it?
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Old 04-02-2021, 04:53 PM   #5
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I want to boost my exercise capacity increase my metabolism to burn more fat at rest and feel more relaxed. I get up at 5 am nearly everyday. I currently added 15mgs ed of yk-11 to my program and like it, my muscles look and feel fuller. I'm experimenting with drugs that I hope will keep me feeling and looking younger.
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Old 04-02-2021, 05:55 PM   #6
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I want to boost my exercise capacity increase my metabolism to burn more fat at rest and feel more relaxed. I get up at 5 am nearly everyday. I currently added 15mgs ed of yk-11 to my program and like it, my muscles look and feel fuller. I'm experimenting with drugs that I hope will keep me feeling and looking younger.
Feeling and looking younger is always a good thing! I’ll be 47 this year. Not getting any younger. That’s for sure. I feel like AAS made me look older honestly. Older with bigger muscles. Trade off I guess. Lol
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