PIG-50

TMB 8 is a non-competitive antagonist of nicotinic acetylcholine receptors (nAChRs) with IC50 values of 390 and 350 nM, respectively, for human muscle-type and α3β4 subunit-containing ganglionic nAChRs expressed in TE671 RD or SH-SY5Y cells. It inhibits nicotine-induced dopamine release from rat brain synaptosomes (IC50 = 480 nM). TMB 8 also reduces calcium availability in smooth and skeletal muscle, blocking the contractile response in isolated rabbit aortic strip when used at a concentration of 50 μM and inhibiting calcium influx and efflux in isolated guinea pig ileum when used at a concentration of 65 μM. It has been used in the study of intracellular calcium dynamics, particularly in smooth muscle. TMB 8 also inhibits protein kinase C (PKC) activity in a dose-dependent manner.

Pyrindolol is a bacterial metabolite that has been found inS. alboverticillatus.1It inhibits neutral β-galactosidase by 50% under acidic, but not neutral, conditions when used at a concentration of 2 μg ml. It is selective for β-galactosidase isolated from bovine liver over β-galactosidases isolated from human, bovine, pig, and rat tissues and sialidases isolated fromC. perfringens,Streptomyces, and the H3N2 strain of influenza virus (IC50s = >250 μg ml for all).1,2 1.Aoyagi, T., Kumagai, M., Hazato, T., et al.Pyridindolol, a new β-galactosidase inhibitor produced by actinomycetesJ. Antibiot. (Tokyo)28(7)555-557(1975) 2.Kumagai, M., Aoyagi, T., and Umezawa, H.Inhibitory activity of pyridindolol on β-galactosidaseJ. Antibiot. (Tokyo)29(7)696-703(1976)

Leukotriene B4 (LTB4) compounds are produced by both enzymatic and non-enzymatic processes. The products of enzymatic origin, via Leukotriene A4 (LTA4) hydrolase, are stereospecifically 12(R). Non-enzymatic hydrolysis products are 50:50 mixtures at C-12, but are almost exclusively trans at C-6. Thus, the non-enzymatic hydrolysis product of LTA4 is 6-trans-12-epi LTB4. 12-epi LTB4 is an isomer which would not be expected to occur in either non-enzymatic hydrolysis products, or in the enzymatic products of LTA4 hydrolase. Compared to LTB4, 12-epi LTB4 has significantly reduced activity for the LTB4 receptor on human neutrophils (IC50 of 7.5 mM), and on guinea pig lung membranes with a (Ki of 4.7 mM). 12-epi LTB4 is an weak agonist at both the recombinant human BLT1 and BLT2 receptors, requiring approximately 10 mM for full activation of the receptor.

Forphenicine is a bacterial metabolite that has been found in S. fulvoviridis and an inhibitor of alkaline phosphatase (IC50 = 0.036 µg ml for the chicken intestine enzyme). It inhibits the growth of HL-60 leukemia cells when used at a concentration of 10 µM. Forphenicine (50 and 500 µg animal) increases survival in a guinea pig model of experimental autoimmune encephalomyelitis (EAE).

AZD1236 is a potent and reversible inhibitor of human MMP-9 and MMP-12 (IC50 = 4.5 and 6.1nM, respectively), with >10-fold selectivity to MMP-2 and MMP-13 and >350-fold selectivity to other members of the enzyme family. AZD1236 activity is approximately 20 to 50-fold lower at the rat, mouse, and guinea pig orthologues. In acute models of lung injury, AZD1236 inhibited the haemorrhage and inflammation induced by instillation of human MMP-12 into rat lungs by ~80% at 0.81mg kg, and also abolished macrophage infiltration into BAL fluid induced by tobacco smoke inhalation in the mouse.

JMV 449 acetate 是一种有效的神经降压素受体 (neurotensin receptor) 激动剂。JMV 449 acetate 显示抑制125I-neurotensin 与新生小鼠脑结合的 IC50为 0.15 nM，对收缩豚鼠回肠的 EC50为 1.9 nM。JMV 449 acetate 对小鼠具有高效、持久的降温和缓解疼痛作用。

[Lys4] Sarafotoxin S6c 是一种 sarafotoxin 类似物，是一种有效的内皮素受体 (endothelin receptor) 的部分激动剂。[Lys4] Sarafotoxin S6c 可诱导猪冠状动脉收缩，其 EC50为 1.5 nM。

SUN-1334H free base 是一种口服有效的组胺 H1 受体抑制剂，IC50为 20.3 nM，Ki为 9.7 nM。它能够抑制由组胺引起的豚鼠离体回肠收缩，其IC50为 0.198 μM，并可抑制组胺导致的豚鼠支气管收缩、比格犬皮肤风疹及卵清蛋白引起的豚鼠鼻炎。

Potent bradykinin receptor agonist. Highly selective for mammalian arterial smooth muscle bradykinin receptors, displaying ~ 50-fold greater potency than bradykinin. Elicits dose-dependent contractile effects in smooth muscle of guinea pig ileum (EC50 = 4