Cas No.: | 53109-32-3 |
Synonyms: | Cyclo(histidyl-proline); Histidylproline diketopiperazine |
SMILES: | O=C(N[C@H]1CC2=CN=CN2)[C@@](CCC3)([H])N3C1=O |
Formula: | C11H14N4O2 |
M.Wt: | 234.25 |
Purity: | >98% |
Sotrage: | 2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO |
Description: | Cyclo(His-Pro) is a cyclic dipeptide derived from the hydrolytic removal of the amino-terminal pyroglutamic acid residue of the hypothalamic thyrotropin-releasing hormone. Cyclo(His-Pro) is ubiquitous in the central nervous system and is a key substrate of organic cation transporters, which are strongly linked to neuroprotection. The cyclic dipeptide can also cross the brain-blood-barrier and, once in the brain, can affect diverse inflammatory and stress responses by modifying the Nrf2-NF-κB signaling axis. Cyclo(His-Pro) inhibits NF-κB nuclear accumulation induced by paraquat in rat pheochromocytoma PC12 cells via the Nrf2/heme oxygenase-1 pathway.Mice that receives cyclo(His-Pro) pre-treatment shows a significant decrease in the oedematogenic response, confirming that the cyclic dipeptide can exert anti-inflammatory effect. Cyclo(His-Pro) exerts in vivo anti-inflammatory effects in the central nervous system by down-regulating hepatic and cerebral TNFα expression thereby counteracting LPS-induced gliosis. Moreover, by up-regulating Bip, cyclo(His-Pro) increases the ER stress sensitivity andtriggers the unfolded protein response to alleviate the ER stress. |