MG-132

SKU: orb1306306

Description

MG-132

Research Area

Cell Biology, Protein Biochemistry, Stem Cell & Developmental Biology

Key Properties

• CAS Number: 133407-82-6
• MW: 475.6
• Purity: >98%
• Formula: C₂₆H₄₁N₃O₅
• SMILES: CC(C)C[C@H](NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(=O)OCc1ccccc1)C=O
• Target: Proteasome
• Solubility: Soluble in DMSO (up to 45 mg/ml), in DMF (up to 45 mg/ml), or in Ethanol (up to 45 mg/ml).

Bioactivity

• Target IC50:
  HCT116 cells:0.82 μM|20S proteasome:100 nM (cell free)|Calpain:1.2 μM (cell free)|COS-7 cells:< 10 μM
• In Vivo:
  METHODS: To detect anti-tumor activity in vivo, MG-132 (1 mg/kg) was injected intravenously into C.B-17/lcr-scid/scidJcl mice harboring the human cervical cancer tumors HeLa, CaSki, or C33A twice a week for 4 weeks. RESULTS: MG-132 significantly inhibited the growth of human cervical cancer tumors, indicating antitumor activity in vivo. METHODS: To investigate the effects of long-term treatment with MG-132 on cardiac hypertrophy and its associated molecular mechanisms, MG-132 (0.1 mg/kg) was injected intraperitoneally into rats with an abdominal aortic band (AAB) once daily for 8 weeks. RESULTS: MG-132 treatment significantly attenuated left ventricular myocyte area, left ventricular weight/body weight, and lung weight/body weight ratios, decreased left ventricular diastolic diameter and wall thickness, and increased the shortening fraction in AAB rats. MG-132 treatment significantly reversed the elevated levels of ERK1/2 and JNK1 phosphorylation in AAB rats.
• In Vitro:
  METHODS: Human cervical cancer cells HeLa were treated with MG-132 (0.5-30 μM) for 24 h, and cell growth inhibition was detected by MTT. RESULTS: MG-132 dose-dependently inhibited HeLa cell growth with an IC50 of approximately 5 μM. METHODS: Human mesothelioma cells NCI-H2452 were treated with MG-132 (0.25-2 μM) for 36 h, and the expression levels of target proteins were detected by Western Blot. RESULTS: MG-132 treatment induces cleavage of caspases 3 and 7, Bid, and PARP in NCI-H2452 cells. MG-132 induces a caspase-dependent apoptosis. METHODS: Human melanoma cells MeWo were treated with MG-132 (0.01-1 μM) for 24 h, and the cell cycle profiles were analyzed by Flow Cytometry. RESULTS: MG-132 induces cell cycle arrest at G2 phase in MeWo cells.
• Cell Research:
  The effect of MG132 on HeLa cell growth was determined by trypan blue exclusion cell counting or measuring MTT dye absorbance of living cells as previously described. In brief, cells (5x10^5 cells per well) were seeded in 24-well plates for cell counting, and cells (5x10^4 cells per well) were seeded in 96-well microtiter plates for the MTT assay. After exposure to indicated amounts of MG132 for 24 h, cells in 24-well plates or 96-well plates were collected with trypsin digestion for trypan blue exclusion cell counting or were used for the MTT assay. Twenty microliters of MTT solution (2 mg/ml in PBS) was added to each well of 96-well plates. The plates were again incubated for 4 h at 37 C. MTT solution in the medium was aspirated off and 200 μl of DMSO was added to each well to solubilize the formazan crystals formed in viable cells. Optical density was measured at 570 nm using a microplate reader. Each plate contained multiple wells at a given experimental condition and multiple control wells. This procedure was replicated for 2-4 plates per condition .
• Animal Research:
  Male Sprague–Dawley rats (8 weeks old, 180 – 230 g) were used to establish a pressure-overload model as described previously. All animals were separated into four groups (10 rats per group): (i) vehicle-treated sham group; (ii) MG132-treated sham group; (iii) vehicle-treated abdominal aortic banding (AAB) group; and (iv) MG132-treated AAB group. Under intraperitoneal pentobarbital (50 mg/kg) anesthesia, AAB was created using a 5-0 suture tied twice around the abdominal aorta in which. a 21-gauge needle was inserted. The needle was then retracted yielding a 70 – 80% constriction with an outer aortic diameter of 0.8 mm. In the sham surgery rats, the same surgery was performed as described above except the aorta was constricted. At Day 3 after the surgery, MG132-treated rats were intraperitoneally injected with 0.1 mg/kg/day of MG132 for 8 weeks. All control animals were injected with a corresponding volume of vehicle only (0.1% DMSO) . Sixteen-week-old male CD1 mice were used for all our experiments. Thirty minutes before the immobilization procedure, 0.1 mg/kg of buprenorphine was administrated IP. The mice were then anesthetized using isoflurane. The right hindlimb was immobilized as previously described. Briefly, the hindlimb was immobilized 7 days by stapling the foot exploiting normal dorso-tibial flexion using an Autosuture Royal 35W skin stapler. One tine was inserted close to the toe at the plantar portion of the foot while the other was inserted in the distal portion of the gastrocnemius. The other hindlimb was used as a control. During the immobilization period, the mice were injected subcutaneously with MG132 (7.5 mg/kg/dose) or vehicle (DMSO) twice daily. DMSO containing or not MG132 was diluted in sterile pure corn oil (1:100, injected volume 150 μL). After 7 days, the tibialis anterior (TA) muscles of immobilized and non-i

Storage & Handling

• Storage: -20°C
• Expiration Date: 12 months from date of receipt.
• Disclaimer: For research use only

Alternative Names

Z-Leu-Leu-Leu-CHO

Compound Identifiers

PubChem CID

462382