GSK 932121 is a potent antimalarial agent. GSK 932121 inhibits selectively the electron-transport chain in P. falciparum at the cytochrome bc1 level (complexIII).
Collismycin A is a bacterial metabolite originally isolated from Streptomyces that has diverse biological activities, including antibacterial, antiproliferative, and neuroprotective properties. It is active against a variety of bacteria (MICs = 6.25 and 100 μg ml) and fungi (MICs = 12.5-100 μg ml). It inhibits proliferation of A549 lung, HCT116 colon, and HeLa cervical cancer cells (IC50s = 0.3, 0.6, and 0.3 μM, respectively) and NIH373 fibroblasts (IC50 = 56.6 μM) but not MDA-MD-231 breast cancer cells (IC50 = >100 μM). Collismycin A forms a complex with Fe(II) and Fe(III) at a 2:1 ratio, and the addition of iron ions inhibits the antiproliferative effect of collismycin A on HeLa cells, an effect that does not occur with the addition of zinc, manganese, copper, or magnesium ions. Collismycin A (1 μM) prevents apoptosis in the brain region of zebrafish larvae by 44% in a model of neuronal cell death induced by all-trans retinoic acid .
Antimycin A4 is an active component of the antimycin A antibiotic complex that is more polar than antimycin A1 , antimycin A2 , and antimycin A3 . Antimycin A4 inhibits ATP-citrate lyase with a Ki value of 64.8 μM. The antimycin A complex is a mixture of antimycins A1, A2, A3, and A4 that demonstrates antifungal, insecticidal, nematocidal, and piscicidal properties. It blocks mitochondrial respiration and can deplete cellular levels of ATP via inhibition of complexIII of the mitochondrial electron transport chain (ETC). Antimycin A prevents the transfer of electrons between the b-cytochromes and ubiquinone at the Q(inner) site of complexIII. This results in the stabilization of the ubisemiquinone radical at the Q(outer) site of complexIII, leading to increased production of superoxide. Antimycin A is widely used in research to shunt electron flow through the ETC to study the chemical details of oxygen respiration. Additionally, antimycin A has been shown to inhibit Bcl-2 and Bcl-xL proteins, inducing apoptosis.
Chlorido[N,N'-disalicylidene-1,2-phenylenediamine]iron(III) is an inducer of ferroptosis.1 It induces ferroptosis, but not apoptosis or necroptosis, in NB1 cancer cells when used at a concentration of 3 μM.1 Chlorido[N,N'-disalicylidene-1,2-phenylenediamine]iron(III) inhibits proliferation of BJAB, NALM-6, Jurkat, MelHO, and MCF-7 cancer cells (IC50s = 0.07, 2.5, 1.5, 3, and 5 μM, respectively), as well as NALM-6 cells resistant to daunorubicin and vincristine when used at concentrations ranging from 0.04 to 0.125 μM.2 |1. Sagasser, J., Ma, B., Baecker, D., et al. A new approach in cancer treatment: Discovery of chlorido[N,N'-disalicylidene-1,2-phenylenediamine]iron(III) complexes as ferroptosis inducers. J. Med. Chem. 62(17), 8053-8061 (2019).|2. Lee, S.-Y., Hille, A., Kitanovic, I., et al. [FeIII(salophene)Cl], a potent iron salophene complex overcomes multiple drug resistance in lymphoma and leukemia cells. Leuk. Res. 35(3), 387-393 (2011).
Metyltetraprole is a potent fungicide that demonstrates promising efficacy against sensitive wild-type and G143A mutant strains of Zymoseptoria tritici, as indicated by its low EC50 values of 0.002 ppm. Additionally, this compound exhibits effectiveness against QoI-resistant strains. Metyltetraprole functions by inhibiting the respiratory chain through complexIII [1] [2].
Heparin (Nadroparin) calcium (MW 3600-5000) 是一种可与抗凝血酶 III (ATIII) 形成复合物的抗凝剂。此肝素-抗凝血酶 III 复合物能与凝血酶及其他活化的凝血因子 IX、X、XI 和 XII 结合,不可逆地使其失活,有效阻止纤维蛋白原转化为纤维蛋白。
Heparin calcium (MW 15000-19000) 是一款高效的抗凝剂,能通过与抗凝血酶 III (ATIII) 形成可逆的复合物——肝素-抗凝血酶 III 复合物。该复合物进一步与凝血酶以及其他活化的凝血因子如IX、X、XI 和 XII 结合,以不可逆的方式使它们失活,从而有效防止纤维蛋白原转变为纤维蛋白。