CI-994

Biological Activity

CI-994 (N-acetyldinaline) is a novel oral agent which inhibits HDAC1, with a wide spectrum of antitumor activity in preclinical models, in vitro and in vivo. CI-994 inhibits growth of LNCaP cell with IC50 of 7.4 μM. CI-994 inhibits growth of rat leukemia BCLO cells with IC50 of 2.5 μM. The effect of CI-994, as demonstrated by recovery experiments, was cytostatic and seemed to be superimposable in both cell lines. Cytofluorimetric analysis to assess cell cycle perturbation and apoptosis was performed after 24 h of treatment, indicating a cell block with concomitant increase at G0/G1 phase, a reduction at S phase level at 20, 40, 80, and 160 microM, and apoptosis at the higher concentration (160 microM). CI-994 is currently in a phase III clinical trial in patients with lung cancer.

Customer Product Validations & Biological Datas

	Source	AIDS Res Hum Retroviruses (2016). Figure 3. CI-994
	Method	Immunoblots
	Cell Lines	CD4+ T cells
	Concentrations	0.57 μM
	Incubation Time	24 h
	Results	Both vorinostat and panobinostat, but not tacedinaline, increased CDK9 T-loop phosphorylation in CCL19-treated cells compared to control cells. Vorinostat and panobinostat, but not tacedinaline, also increased histone H3 acetylation in CCl19-treated cells.

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

Species	Mouse	Rat	Rabbit	Guinea pig	Hamster	Dog
Weight (kg)	0.02	0.15	1.8	0.4	0.08	10
Body Surface Area (m2)	0.007	0.025	0.15	0.05	0.02	0.5
Km factor	3	6	12	8	5	20

Animal A (mg/kg) = Animal B (mg/kg) multiplied by	Animal B Km
	Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the K_m factor for a mouse and then divide by the K_m factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Chemical Information