HPOB 是一种高效、选择性的HDAC6抑制剂，IC50为 56 nM。HPOB 显示对其他 HDAC 的效力降低了 30 倍以上。HPOB 提高 DNA 损伤抗癌药物在转化细胞中的有效性。HPOB 不阻断 HDAC6 的泛素结合活性。
| 生物活性 | HPOB is a highly potent and selective inhibitor ofHDAC6with anIC50of 56 nM. HPOB displays >30 fold less potent against other HDACs. HPOB enhances the effectiveness of DNA-damaging anticancer agents in transformed cells but not normal cells. HPOB does not block the ubiquitin-binding activity ofHDAC6[1]. |
| IC50& Target[1] | HDAC6 0.056 μM (IC50) | HDAC3/NCOR2 1.7 μM (IC50) | HDAC8 2.8 μM (IC50) | HDAC1 2.9 μM (IC50) | HDAC10 3.0 μM (IC50) | HDAC2 4.4 μM (IC50) |
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体外研究
(In Vitro) | HPOB (8, 16, or 32 μM; 72 hours) inhibits growth, however, not viability, of normal or transformed cells[1].
In normal (HFS) and transformed (LNCAP, U87, and A549) cells, HPOB causes accumulation of acetylated α-tubulin and acetylated peroxiredoxin, substrates of HDAC6, but not of acetylated histones. HPOB enhances etoposide-, doxorubicin-, and SAHA-induced transformed cell ((LNCAP, U87, and A549 cells) death but not normal cell death[1].
In LNCaP cells cultured with HPOB and etoposide, there was an increase in cleaved PARP, a marker of apoptosis. Combination of HPOB with etoposide increased the accumulation of DNA damage compared with etoposide alone as evidenced by accumulation of γH2AX in LNCaP cells[1].
HPOB attenuates corticosterone-induced injury in rat adrenal pheochromocytoma PC12 cells by inhibiting mitochondrial GR translocation and the intrinsic apoptosis pathway[2].
Cell Proliferation Assay[1] | Cell Line: | Normal human foreskin fibroblast (HFS), LNCaP, A549, U87 cells | | Concentration: | 8, 16, or 32 μM | | Incubation Time: | 72 hours | | Result: | Inhibited cell growth of normal and transformed cells in a concentration-dependent manner but do not induce cell death of normal or transformed cells. |
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体内研究
(In Vivo) | HPOB (300 mg/kg; i.p.; daily for 18 days) and SAHA (50 mg/kg) causes suppression of the growth of established CWR22 tumors[1].
| Animal Model: | Nude mice (CWR22 human prostate cancer xenograf)[1] | | Dosage: | 300 mg/kg | | Administration: | I.p.; daily for 18 days | | Result: | Combination with SAHA showed significant shrinkage of CWR22 tumors. |
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| 运输条件 | Room temperature in continental US; may vary elsewhere. |
| 储存方式 | | Powder | -20°C | 3 years | | 4°C | 2 years | | In solvent | -80°C | 6 months | | -20°C | 1 month |
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| 溶解性数据 | In Vitro: DMSO : 50 mg/mL(159.06 mM;Need ultrasonic) 配制储备液 | 1 mM | 3.1813 mL | 15.9063 mL | 31.8127 mL | | 5 mM | 0.6363 mL | 3.1813 mL | 6.3625 mL | | 10 mM | 0.3181 mL | 1.5906 mL | 3.1813 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℃, 6 months; -20℃, 1 month。-80℃ 储存时，请在 6 个月内使用，-20℃ 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: ≥ 2.5 mg/mL (7.95 mM); Clear solution
此方案可获得 ≥ 2.5 mg/mL (7.95 mM，饱和度未知) 的澄清溶液。 以 1 mL 工作液为例，取 100 μL 25.0 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。 2. 请依序添加每种溶剂： 10% DMSO 90% (20%SBE-β-CDin saline) Solubility: ≥ 2.5 mg/mL (7.95 mM); Clear solution
此方案可获得 ≥ 2.5 mg/mL (7.95 mM，饱和度未知) 的澄清溶液。 以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。 3. 请依序添加每种溶剂： 10% DMSO 90%corn oil Solubility: ≥ 2.5 mg/mL (7.95 mM); Clear solution
此方案可获得 ≥ 2.5 mg/mL (7.95 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 25.0 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本网站选购。
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