sst 4

Pasireotide (SOM230) acetate是长效的环己肽生长激素抑制素类似物，具有抗分泌、抗增殖和促凋亡活性。Pasireotide (SOM230) acetate可抑制 GH、IGF-I 和 ACTH 的分泌，可用于研究肢端肥大症和库欣病。Pasireotide (SOM230) acetate还可以提高生长抑素受体的激动剂活性，对sst1、2、3、4、5的pKi 分别为 8.2、9.0、9.1、小于7.0 和 9.9。

L-803087 是一种具有高效性和选择性的生长抑素 sst4 受体激动剂，对 sst4 的 Ki 值为 0.7 nM，比其他生长抑素受体的选择性高 280 倍以上。L-803087 在体外诱导 AMPA 介导的海马突触反应，在体内增加了海藻酸盐促使的小鼠癫痫发作。

The ED50 of J-2156 in rats for the relief of mechanical allodynia and mechanical hyperalgesia in the ipsilateral hindpaws was 3.7 and 8.0 mg/kg, respectively. J-2156 is a high potent, selective somatostatin receptor type 4 (SST4 receptor) agonist with IC5

PRL 3195 是一种somatostatin receptor 拮抗剂，对人生长抑素受体 sst5、sst2、sst3、sst1和 sst4的Ki 分别为 6、17、66、1000 和 1000 nM。

Pasireotide pamoate is a stable cyclohexapeptide somatostatin mimic. Pasireotide pamoate exhibits antisecretory, antiproliferative, and proapoptotic activity.

Pasireotide is a stable cyclohexapeptide somatostatin mimic.

SSTR4agonist-1 (Compound 47) 是一种选择性激活生长抑素受体 4 (SSTR4) 的激动剂，EC50为 4.7 nM，并且在人体肝微粒体中的半衰期超过 130 分钟。

SSTR4 agonist5 (Compound 5) 是一种口服有效的生长抑素受体 4 (SSTR4) 激动剂，EC50为 0.228 nM。在人和大鼠肝微粒体中，SSTR4 agonist5 显示出良好的稳定性，并且能够在大鼠模型中抑制机械痛觉过敏。

Cortistatin-29 is a neuropeptide that is structurally similar to somatostatin-28. It is produced by cleavage of preprocortistatin to procortistatin, which is cleaved at dibasic amino acids to form cortistatin-29 and cortistatin-14 as well as other partial cleavage products. Cortistatin mRNA is expressed in the human brain and in interneurons of the rat hippocampus and cerebral cortex. Cortistatin-29 binds to somatostatin (SST) receptors with IC50 values of 2.8, 7.1, 0.2, 3, and 13.7 nM for SST1-5, respectively. Cortistatin-29 is found at similar levels as cortistatin-14 in mouse AtT20 cells but is secreted at a lower level. Cortistatin-29 corresponds to residues 85-112 of the rat peptide sequence.

L-803087 TFA is a highly potent and selective agonist of the somatostatin sst4 receptor, exhibiting a Ki value of 0.7 nM. It displays a remarkable selectivity, being over 280-fold more preferential for the sst4 receptor compared to other somatostatin receptors. Furthermore, L-803087 TFA promotes AMPA-mediated synaptic responses in hippocampal preparations and enhances kainate-induced seizures in mice.

PRL 2915 是一种有效的人类生长抑素亚型 2 受体拮抗剂 (hsst2)，其Ki 为 12 nM。

Veldoreotide (DG3173) TFA，一种生长抑素类似物，能够结合并激活SSTR 2/4/5。其在腺瘤中抑制生长激素分泌的效果相较于Octreotide更为显著。此外，Veldoreotide亦展现出作为镇痛剂的潜力。

Veldoreotide, also known as Somatoprim, is a unique somatostatin receptor subtypes 2-, 4- and 5-selective analogue which effectively reduces GH secretion in human GH-secreting pituitary adenomas, even in Octreotide non-responsive tumours.