Mepazine

Mepazine (Pecazine) is a potent and selective MALT1 inhibitor. Mepazine inhibits GSTMALT1 full length and GSTMALT1 325-760 with IC50s of 0.83 and 0.42 μM, respectively. Mepazine affects viability of ABC-DLBCL cells by enhancing apoptosis[1].

Signaling Pathways >> Apoptosis >> Apoptosis

Research Areas >> Cancer

Signaling Pathways >> NF-κB >> MALT1

Mepazine (5-20 μM; 4 days) causes a decrease of cell viability in the activated B cell subtype of diffuse large B cell lymphoma (ABCDLBCL) cells, without significantly affecting GCB-DLBCL cells[1]. Cell Viability Assay[1] Cell Line: ABC-DLBCL cell lines (HBL1, OCI-Ly3, U2932, TMD8, OCI-Ly10) and GCB-DLBCL cell lines (BJAB, Su-DHL-6, Su-DHL-4) Concentration: 5, 10, and 20 μM Incubation Time: 4 days Result: Caused a decrease of cell viability in the ABC-DLBCL cells HBL1, OCI-Ly3, U2932, and TMD8, without significantly affecting GCB-DLBCL cells.

Mepazine (16 mg/kg; intraperitoneal administration) interferes with growth and induces apoptosis of ABC-DLBCL cell line OCI-Ly10 in NOD/scid IL-2Rgnull (NSG) mice with a murine DLBCL xenogeneic tumor model. Daily administration of Mepazine strongly impairs the expansion of the ABC-DLBCL cell line OCI-Ly10[1]. Animal Model: 6- to 8-week-old female NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ (NSG) mice with a murine DLBCL xenogeneic tumor model[1] Dosage: 400 μg per animal (25 g), corresponding to approximately 16 mg/kg. Administration: Intraperitoneal administration; started 1 or 12 days after transplantation and given continuously every 24 hr; daily application Result: Daily administration strongly impaired the expansion of the ABC-DLBCL cell line OCI-Ly10.

[1]. Nagel D, et al. Pharmacologic inhibition of MALT1 protease by phenothiazines as a therapeutic approach for the treatment of aggressive ABC-DLBCL. Cancer Cell. 2012 Dec 11;22(6):825-37.

MOLECULAR FORMULA :

C19-H22-N2-S

MOLECULAR WEIGHT :

310.49

WISWESSER LINE NOTATION :

T C666 BN ISJ B1- CT6NTJ A1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

200 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

FATOAO Farmakologiya i Toksikologiya (Moscow). For English translation, see PHTXA6 and RPTOAN. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.2- 1939- Volume(issue)/page/year: 24,136,1961

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

140 mg/kg

TOXIC EFFECTS :

Behavioral - somnolence (general depressed activity)

REFERENCE :

ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 8,489,1958

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

750 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

CANJAE Canadian Anaesthetists' Society Journal. (Toronto, Ont., Canada) V.1-33, 1954-86. Volume(issue)/page/year: 3,224,1956

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intravenous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

70 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 4,232,1954

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intravenous

SPECIES OBSERVED :

Rodent - rabbit

DOSE/DURATION :

20 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

CANJAE Canadian Anaesthetists' Society Journal. (Toronto, Ont., Canada) V.1-33, 1954-86. Volume(issue)/page/year: 3,224,1956 *** REVIEWS *** TOXICOLOGY REVIEW JMSCA9 Journal of Mental Science. (London, UK) V.4-108, 1857-1962. For publisher information, see BJPYAJ. Volume(issue)/page/year: 106,755,1960