TMZ(Temozolomide)

Catalog No.S1237 Batch:S123712

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Technical Data

Formula

C6H6N6O2
Molecular Weight 194.15 CAS No. 85622-93-1
Solubility (25°C)* In vitro DMSO 39 mg/mL (200.87 mM)
Water 7 mg/mL (36.05 mM)
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Homogeneous suspension
CMC-NA
≥5mg/ml Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution
5%DMSO 30%PEG300 65%ddH2O

Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.

 2.000mg/ml (10.30mM) Taking the 1 mL working solution as an example, add 50 μL of 40 mg/ml clarified DMSO stock solution to 300 μL of PEG 300, mix evenly to clarify it; then continue to add 650 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Temozolomide (TMZ) is a monofunctional SN-1 alkylating agent that can modify nitrogen atoms in the DNA ring and the extracyclic oxygen group, chemically converted to MTIC and degrades to methyldiazonium cation, which transfers methyl groups to DNA at physiologic pH. It is a DNA damage inducer in L-1210 and L-1210/BCNU cells. This compound induces apoptosis and exhibits antitumor activity.
Targets
DNA replication [1]
(L-1210, L-1210/BCNU cells)
In vitro

Temozolomide (TMZ) causes formation of DNA alkali-labile sites which are present in similar amounts and repaired at a similar rate in L-1210 and L-1210/BCNU cell lines. In L-1210 but not in L-1210/BCNU this compound induces an arrest of cells in SL-G2-M phases.[1] Its sensitivity of both chemo-sensitive and resistant cells (D54-R and U87-R) is enhanced significantly under hyperoxia. Both it and hyperoxia are associated with increased phosphorylation of ERK p44/42 MAPK (Erk1/2), but to a lesser extent in D54-R cells, suggesting that Erk1/2 activity may be involved in regulation of hyperoxia and TMZ-mediated cell death. Hyperoxia enhances its toxicity in GBM cells by induction of apoptosis, possibly via MAPK-related pathways. [2] It induces in monocytes the DNA damage response pathways ATM-Chk2 and ATR-Chk1 resulting in p53 activation. [3] Chronic exposure to this compound results in acquired TMZ-resistance and elevates miR-21 expression. [4] Treatment with it triggers endoplasmic reticula (ER) stress with increased expression of GADD153 and GRP78 proteins, and deceases pro-caspase 12 protein. It induces autophagy through mitochondrial damage- and ER stress-dependent mechanisms to protect glioma cells. [5]
In vivo

After a daily i.p. dose of 40 mg/kg for 5 consecutive days (days 1-5 after tumor transplant), TMZ (Temozolomide) increases life-span by 86% in L-1210 and 22% in L-1210/BCNU. In L-1210/BCNU no effect is seen after 100 μM or 200 μM treatment; only 400 μM of this compound produced an accumulation of cells in premitotic phase but much less than in L-1210. In L-1210/BCNU the maximum accumulation of cells in SL-G2-M is, after 48 hours-72 hours, approximately 30% as compared to 23% in untreated cells. Cells accumulates in SL-G2-M occurred too when L- 1210 leukemia-bearing mice are treated i.v. with it (40 mg/kg). No such effect is seen on L-1210/BCNU cells from mice given the same drug dose. [1]
Features Methazolastone is a second-generation alkylating agent.

Protocol (from reference)

Cell Assay:

[1]
  • Cell lines

    L-1210 and L-1210/BCNU cells

  • Concentrations

    0 μM -100 μM

  • Incubation Time

    l hours

  • Method

    L-1210 and L-1210/BCNU cells are seeded at 0.2 × 104 cells/mL and incubated for 24 hours. The cultures are treated with TMZ (Temozolomide) for l hours at 37oC, then washed twice in PBS by centrifugation and resuspended in fresh medium. Controls and treated samples are diluted in fresh medium 1:4 at 48 hours and 1:2 at 96 hours. Using these dilutions cell concentrations throughout the experiments are between 3 × 105 and 8 × 105/mL. Control growth is logarithmic in this range.
Animal Study:

[1]
  • Animal Models

    DBA/2 mice with L-1210 and L-1210/BCNU cells

  • Dosages

    40 mg/kg

  • Administration

    Administered via i.v.

References

  • https://pubmed.ncbi.nlm.nih.gov/3621181/
  • https://pubmed.ncbi.nlm.nih.gov/22763762/
  • https://pubmed.ncbi.nlm.nih.gov/22768182/
  • https://pubmed.ncbi.nlm.nih.gov/22753745/
  • https://pubmed.ncbi.nlm.nih.gov/22745676/
  • https://pubmed.ncbi.nlm.nih.gov/22627392/

Customer Product Validation

C57BL/6 mice were implanted in the striatum with citrine-GL26-Cherry-HMGB1, which were stably transfected to express the YFP citrine and HMGB1 fused to red fluorescent protein cherry. Fourteen days later, they were treated with saline, Ad-TK+Ad-Flt3L, or Ad-TK+Ad-Flt3L+TMZ (temozolomide). Five days after treatment, the cellular location of cherry-HMGB1 in these cells was assessed by confocal microscopy. Arrows, tumor cells (green) with cytoplasmic HMGB1 (red).

Data from [ Clin Cancer Res , 2014 , 20(6), 1555-65 ]

D, Scramble (SCR), H82, H865, and H1836 cells were treated with AZD1775 (100 nmol/L) and temozolomide (1 μmol/L) for 24 hours; WEE1 KD cells were treated with just temozolomide (1 μmol/L) for 24 hours. The cells were lysed at 24 hours and subjected to Western blot analysis for phosphorylated WEE1 (pWEE1_S642), pCDC2_Y15 (WEE1 downstream effector), γH2AX (DNA damage marker), PH3 (mitotic marker), cleaved caspase-3 (apoptotic marker), and actin (loading control). E, SCR and WEE1 KD H82, H865, and H1836 cells were treated as described in D and subjected to Western blot analysis for DNA repair markers pATM_S1981, MRE11, RAD51, and E2F1. Actin was used as a loading control.

Data from [ , , Clin Cancer Res, 2017, 23(20):6239-6253 ]

Talazoparib and temozolomide exhibit marked combinatorial efficacy in PDXs. A, Western blot against MGMT by near-infrared imaging in PDX models.

Data from [ , , Clin Cancer Res, 2017, 23(2):523-535 ]

Data from [ , , J Control Release, 2018, 269:245-257 ]

Selleck's TMZ(Temozolomide) Has Been Cited by 263 Publications

Cisplatin and temozolomide combinatorial treatment triggers hypermutability and immune surveillance in experimental cancer models [ Cancer Cell, 2025, S1535-6108(25)00223-5] PubMed: 40513578
Proteogenomic characterization of non-functional pancreatic neuroendocrine tumors unravels clinically relevant subgroups [ Cancer Cell, 2025, 43(4):776-796.e14] PubMed: 40185092
Multidimensional third-generation sequencing of modified DNA bases allows interrogation of complex biological systems [ Nat Commun, 2025, 16(1):5676] PubMed: 40593667
HR eye & MMR eye: one-day assessment of DNA repair-defective tumors eligible for targeted therapy [ Nat Commun, 2025, 16(1):4239] PubMed: 40355434
A cancer persistent DNA repair circuit driven by MDM2, MDM4 (MDMX), and mutant p53 for recruitment of MDC1 and 53BP1 on chromatin [ Nucleic Acids Res, 2025, 53(13)gkaf627] PubMed: 40626562
Calnexin promotes glioblastoma progression by inducing protective mitophagy through the MEK/ERK/BNIP3 pathway [ Theranostics, 2025, 15(6):2624-2648] PubMed: 39990231
Overexpression of miR-124 enhances the therapeutic benefit of TMZ treatment in the orthotopic GBM mice model by inhibition of DNA damage repair [ Cell Death Dis, 2025, 16(1):47] PubMed: 39865088
Transketolase attenuates the chemotherapy sensitivity of glioma cells by modulating R-loop formation [ Cell Rep, 2025, 44(1):115142] PubMed: 39792560
CDK12 regulates cellular metabolism to promote glioblastoma growth [ JCI Insight, 2025, 10(21)e190780] PubMed: 40996961
EZH2 inhibition sensitizes MYC-high medulloblastoma cancers to PARP inhibition by regulating NUPR1-mediated DNA repair [ Oncogene, 2025, 44(6):391-405] PubMed: 39562655

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