Lys05 是一种有效的水溶性溶酶体自噬抑制剂，具有抗肿瘤活性。在MTT试验中，对1205Lu、c8161、LN229 和HT-29细胞系的IC50值分别为3.6、3.8、6 和7.9 μM。

Lys05, or Lys01 trihydrochloride, is a potent, water soluble lysosomal autophagy inhibitor. Lys05 is a previously undescribed dimeric chloroquine which more potently accumulates in the lysosome and blocks autophagy compared with HCQ. Lys05 produced more potent antitumor activity as a single agent both in vitro and in vivo in multiple human cancer cell lines and xenograft models compared with HCQ. Lys05 is therefore a new lysosomal autophagy inhibitor that has potential to be developed further into a drug for cancer and other medical applications.

Lys01, is a 10-fold more potent autophagy inhibitor than HCQ. Compared with HCQ, Lys05, a water-soluble salt of Lys01, more potently accumulates within and deacidifies the lysosome. Lys01 and lys01 trihydrochloride produce equivalent dose-dependent increases in the LC3II/LC3I ratio, accumulation of the autophagy cargo protein p62, and identical IC50 values in the MTT assay[1].

With this high-dose, short-term treatment, no mice die, but after 2 d of dosing, mice treated with lys01 trihydrochloride 76 mg/kg i.p. are observed to have arched backs and lethargy. Morphologically, EM show that cells with intact nuclear and cytoplasmic membranes contain large AVs in lys01 trihydrochloride-treated tumors. Tumor growth is significantly impaired in lys01 trihydrochloride-treated tumors compared with controls. Lys01 trihydrochloride treatment results in a 53% reduction in the average daily tumor growth rate compared with vehicle-treated controls. A significant three- and six-fold accumulation of AV is observed at the end of 14 d of treatment in HCQ- and lys01 trihydrochloride-treated tumors, respectively, compared with control-treated tumors[1].

1205Lu, c8161, LN229 and HT-29 cells are treated with lys01 trihydrochloride (0, 0.01, 0.1, 1, and 10 μM) or Lys01 (0, 0.01, 0.1, 1, and 10 μM) in five replicates for 72 h. The Acid Phsophatase Assay kit is used for the MTT assay[1].

1391426-24-6

C23H26Cl5N5

549.75

Lys01 trihydrochloride

Ethanol:<1 mgml
H2O:3 mg/mL(5.5 mM)
DMSO:6.4 mg/mL
Powder: -20°C for 3 years
In solvent: -80°C for 2 years