Mepazine

Modify Date: 2025-08-24 21:39:23

Mepazine structure	Common Name	Mepazine
	CAS Number	60-89-9	Molecular Weight	310.45600
	Density	1.159 g/cm3	Boiling Point	444.4ºC at 760 mmHg
	Molecular Formula	C₁₉H₂₂N₂S	Melting Point	N/A
	MSDS	N/A	Flash Point	222.6ºC

Use of 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].

Name	10-[(1-methylpiperidin-3-yl)methyl]phenothiazine
Synonym	More Synonyms

Description	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].
Related Catalog	Signaling Pathways >> Apoptosis >> Apoptosis Research Areas >> Cancer Signaling Pathways >> NF-κB >> MALT1
In Vitro	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.
In Vivo	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.
References	[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.

Density	1.159 g/cm3
Boiling Point	444.4ºC at 760 mmHg
Molecular Formula	C₁₉H₂₂N₂S
Molecular Weight	310.45600
Flash Point	222.6ºC
Exact Mass	310.15000
PSA	31.78000
LogP	4.63400
Index of Refraction	1.627
InChIKey	CBHCDHNUZWWAPP-UHFFFAOYSA-N
SMILES	CN1CCCC(CN2c3ccccc3Sc3ccccc32)C1

CHEMICAL IDENTIFICATION

RTECS NUMBER :: SP2625000

CHEMICAL NAME :: Phenothiazine, 10-((1-methyl-3-piperidyl)methyl)-

CAS REGISTRY NUMBER :: 60-89-9

LAST UPDATED :: 199707

DATA ITEMS CITED :: 6

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

Hazard Codes	Xi
HS Code	2934300000

HS Code	2934300000
Summary	2934300000. other compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Lacumin

10-[(1-methyl-3-piperidinyl)methyl]-10H-phenothiazine

Pecazine

MEPAZINE

10-(1-methyl-piperidin-3-ylmethyl)-10H-phenothiazine

mepasin

Pacatal

Nothiazine

Meprazine

Mepazin

Pecatal

Pakatal

10-(1-methyl-[3]piperidylmethyl)-phenothiazine

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