O6-Benzylguanine

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O6-Benzylguanine  纯度: 99.63%

O6-Benzylguanine 是鸟嘌呤类似物，是 DNA 修复酶 O6 烷基鸟嘌呤DNA烷基转移酶 (MGMT/AGT) 抑制剂。O6-Benzylguanine 作为 AGT 底物，将其苄基转移到 AGT 半胱氨酸残基上，从而不可逆地灭活 AGT 并阻止 DNA 修复。O6-Benzylguanine 诱导肿瘤细胞凋亡，具有抗肿瘤活性。

O6-Benzylguanine

O6-Benzylguanine Chemical Structure

CAS No. : 19916-73-5

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10 mM * 1 mL in DMSO ￥270 In-stock
10 mg ￥240 In-stock
25 mg ￥460 In-stock
50 mg ￥720 In-stock
100 mg ￥1170 In-stock
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生物活性

O6-Benzylguanine, a guanine analog, is the DNA repair enzyme O6-alkylguanine-DNA alkyltransferase (MGMT/AGT) inhibitor. O6-Benzylguanine acts as an AGT substrate, which transfers its benzyl group to the AGT cysteine residue, thereby irreversibly inactivating AGT and preventing DNA repair. O6-Benzylguanine induces tumor cell apoptosis. Antineoplastic activity[1][2].

体外研究
(In Vitro)

The L3.6pl cells are relatively sensitive to O6-Benzylguanine (24-72 hours) in a dose- and time-dependent manner. The IC50 is 50 μg (at 48 hours)[2].
O6-Benzylguanine (50 μg; 48 hours) modulates p53 downstream target protein expression, induces apoptosis, and decreases cell proliferation[2].
O6-Benzylguanine (50 μg; 48 hours) significantly decreases the MGMT transcriptional activity in L3.6pl[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Western Blot Analysis[2]

Cell Line: L3.6pl and PANC1 cells
Concentration: 50 μg
Incubation Time: 48 hours
Result: Expressions of O6 methyl guanine DNA methyl transferase (MGMT), cyclin B1, cyclin B2, cyclin A, p53, and ki-67 were decreased, whereas p21 was increased. The levels of cyto C and caspase 9 were increased, whereas the levels of PARP1 protein were decreased.

RT-PCR[2]

Cell Line: L3.6pl cells
Concentration: 50 μg
Incubation Time: 48 hours
Result: Decreased the MGMT transcriptional activity in L3.6pl.

体内研究
(In Vivo)

O6-Benzylguanine (100 μg; i.p.; daily for 35 days) inhibits pancreatic cancer cell growth and increases pancreatic cell sensitivity to Gemcitabine (100 mg/kg)[2].
O6-Benzylguanine inhibits pancreatic cancer cell proliferation and induces tumor cell apoptosis in vivo[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male athymic nude mice (NCI-nu) (bearing human pancreatic cancer L3.6pl cells)[2]
Dosage: 100 μg
Administration: i.p; daily for 35 days
Result: Significantly decreased median tumor volume and weight.

Clinical Trial

分子量

241.25

Formula

C12H11N5O
CAS 号

19916-73-5
运输条件

Room temperature in continental US; may vary elsewhere.
储存方式

4°C, protect from light

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
溶解性数据
In Vitro: 

DMSO : 110 mg/mL (455.96 mM; Need ultrasonic)

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 4.1451 mL 20.7254 mL 41.4508 mL
5 mM 0.8290 mL 4.1451 mL 8.2902 mL
10 mM 0.4145 mL 2.0725 mL 4.1451 mL

*

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (protect from light)。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

In Vivo:

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

  • 1.

    请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.75 mg/mL (11.40 mM); Clear solution

    此方案可获得 ≥ 2.75 mg/mL (11.40 mM，饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例，取 100 μL 27.5 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

    将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

  • 2.

    请依序添加每种溶剂： 10% DMSO    90% corn oil

    Solubility: ≥ 2.75 mg/mL (11.40 mM); Clear solution

    此方案可获得 ≥ 2.75 mg/mL (11.40 mM，饱和度未知) 的澄清溶液，此方案不适用于实验周期在半个月以上的实验。

    以 1 mL 工作液为例，取 100 μL 27.5 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

*以上所有助溶剂都可在 上海金畔生物科技有限公司 网站选购。
参考文献

  • [1]. Rabik CA, Njoku MC, Dolan ME. Inactivation of O6-alkylguanine DNA alkyltransferase as a means to enhance chemotherapy. Cancer Treat Rev. 2006;32(4):261‐276.

    [2]. Konduri, Santhi D et al. Blockade of MGMT expression by O6 benzyl guanine leads to inhibition of pancreatic cancer growth and induction of apoptosis. Clinical cancer research : an official journal of the American Association for Cancer Research vol. 15,19 (2009): 6087-95.

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