ISRIB (trans-isoMer)

ISRIB (trans-isoMer) C화학적 특성, 용도, 생산

개요

ISRIB (trans-isomer), the trans-isomer of ISRIB, is a potent and selective PERK inhibitor with IC50 of 5 nM and does not have global effects on translation, transcription, or mRNA stability in non-stressed cells.

용도

trans-ISRIB is an integrated stress response (ISR) inhibitor; reverses the effects of eIF2α phosphorylation (IC50 = 5 nM) and restores cell translation capacity. Acts downstream of PERK, targeting interactions between eIF2α kinases and elF2B. Blocks ATF4 production without altering the IRE1 or ATF6 responses in vitro. Displays memory enhancement in hippocampus-dependent spatial and fear-associated learning in rodents. trans-ISRIB promotes survival of pluripotent stem cells in culture when used in combination with Chroman-1, emricasan, and polyamines, a combination known as CEPT. When used as part of the CEPT cocktail, trans-ISRIB improves survival of differentiated cells following cryopreservation. Brain penetrant.

Biological Functions

ISRIB (trans-isomer) is a potent inhibitor of the integrated stress response (ISR).
Integrated stress response (ISR) is activated by diverse cellular conditions and rapidly reduces overall protein synthesis while enhancing translation of specific transcripts that support adaptive stress responses. The ISR is mediated by diverse stress-sensing kinases that phosphorylating serine 51 in eukaryotic translation initiation factor alpha (eIF2α).
ISRIB (trans-isomer) is a potent ISR inhibitor. ISRIB reversed the effects of eIF2α phosphorylation with IC50 value of 5 nM. ISRIB inhibited production of endogenous ATF4 (a cAMP element binding transcription factor). In mouse embryonic fibroblasts (MEFs), ISRIB reversed the increase in the 80S monosomes at the expense of polyribosomes induced by endoplasmic reticulum (ER) stress. In ER-stressed cells, ISRIB reduced cell survival. In stressed cells, ISRIB restored mRNA translation and inhibited stress granule (SG) formation induced by eIF2α phosphorylation. ISRIB inhibited the interaction between eIF2B and eIF2 that located at the core of the ISR. Also, ISRIB was an activator of eIF2B and stabilized activated eIF2B dimers.
In mice, ISRIB significantly increased hippocampus-dependent spatial and fear-associated learning.

생물학적 활성

ISRIB, a drug that inhibits the integrated stress response (ISR), imparts resistance to the cells against the downstream effects of eukaryotic initiation factor 2 (eIF2)α phosphorylation such as activating transcription factor 4 (ATF4) and eukaryotic translation initiation factor 4E (eIF4E)-binding protein 1 (4E-BP1) induction. This potent and selective inhibitor of ISR can penetrate the blood-brain barrier and prevent cells from adapting to the endoplasmic reticulum (ER) stress. By inhibiting the PERK signaling pathway, ISRIB can effectively reverse the effects of eIF2a phosphorylation and restore the cells' translation capacity, resulting in enhanced cognitive memory in rodents.

참고 문헌

[1]. Sidrauski C, Acosta-Alvear D, Khoutorsky A, et al. Pharmacological brake-release of mRNA translation enhances cognitive memory. Elife, 2013, 2: e00498.
[2]. Sidrauski C, McGeachy AM, Ingolia NT, et al. The small molecule ISRIB reverses the effects of eIF2α phosphorylation on translation and stress granule assembly. Elife, 2015, 4.
[3]. Sekine Y, Zyryanova A, Crespillo-Casado A, et al. Stress responses. Mutations in a translation initiation factor identify the target of a memory-enhancing compound. Science, 2015, 348(6238): 1027-1030.
[4]. Sidrauski C, Tsai JC, Kampmann M, et al. Pharmacological dimerization and activation of the exchange factor eIF2B antagonizes the integrated stress response. Elife, 2015, 4: e07314.

ISRIB (trans-isoMer) 준비 용품 및 원자재

원자재

준비 용품

ISRIB (trans-isoMer) 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Wuhan Nutra Biotechnology Co.,Ltd	+8617786394783	nutrabiotech@outlook.com	China	300	58
career henan chemical co	+86-0371-86658258 15093356674;	factory@coreychem.com	China	29826	58
Shanghai UCHEM Inc.	+862156762820 +86-13564624040	sales@myuchem.com	China	6711	58
Hangzhou FandaChem Co.,Ltd.	008657128800458; +8615858145714	fandachem@gmail.com	China	9352	55
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	32480	60
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
BOC Sciences	+1-631-485-4226	inquiry@bocsci.com	United States	19553	58
HANGZHOU CLAP TECHNOLOGY CO.,LTD	86-571-88216897,88216896 13588875226	sales@hzclap.com	CHINA	6313	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	29474	58
Zhejiang J&C Biological Technology Co.,Limited	+1-2135480471 +1-2135480471	sales@sarms4muscle.com	China	10523	58

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