Z-FY-CHO (Z-Phe-Tyr-CHO) is a potent and specificcathepsin L(CTSL)inhibitor^[1][2].

Cathepsin L (CTSL)^[1]

Z-FY-CHO (10 μM, for 1 h) pretreatment alleviated cell death induced by 6-OHDA. Z-FY-CHO inhibits the increase in CTSL protein expression in 6-OHDA-treated SH-SY5Y cells. Treatment with Z-FY-CHO caused more LC3-II and less P62 expression in SH-SY5Y cells treated with 6-OHDA, indicating enhancing autophagy activity, and Z-FY-CHO blocks activation of caspase-3 and PARP^[1].
Treatment with the specific cathepsin L inhibitor Z-FY-CHO (10 μM) or transfection with cathepsin L shRNA significantly increased the radiosensitivity of U251 cells. Both suppression and knockdown of cathepsin L in U251 cells increased irradiation-induced DNA damage and G2/M phase cell cycle arrest. Both suppression and knockdown of cathepsin L in U251 cells also increased irradiation-induced apoptosis, as shown by the increased levels of Bax and decreased levels of Bcl-2^[2].

Intraperitoneal administration of Z-FY-CHO (2.5-10 mg/kg) for 4 weeks suppresses bone weight loss dose dependently in the ovariectomized mouse, experimental model of osteoporosis. Z-FY-CHO acts as a bone resorption suppressor through the inhibition of collagen degradation^[3].

446.50

Solid

C₂₆H₂₆N₂O₅

167498-29-5

Room temperature in continental US; may vary elsewhere.

-20°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

DMSO : 100 mg/mL(223.96 mM;Need ultrasonic)

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 (sealed storage, away from moisture)。-80℃ 储存时，请在 6 个月内使用，-20℃ 储存时，请在 1 个月内使用。

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: ≥ 1.25 mg/mL (2.80 mM); Clear solution

  此方案可获得 ≥ 1.25 mg/mL (2.80 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 12.5 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% (20%SBE-β-CDin saline)

  Solubility: 1.25 mg/mL (2.80 mM); Suspended solution; Need ultrasonic

  此方案可获得 1.25 mg/mL (2.80 mM) 的均匀悬浊液，悬浊液可用于口服和腹腔注射。

  以 1 mL 工作液为例，取 100 μL 12.5 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。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明
• 3.

  请依序添加每种溶剂： 10% DMSO    90%corn oil

  Solubility: ≥ 1.25 mg/mL (2.80 mM); Clear solution

  此方案可获得 ≥ 1.25 mg/mL (2.80 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 12.5 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。