1. Metabolic Enzyme/Protease Apoptosis Protein Tyrosine Kinase/RTK NF-κB Immunology/Inflammation
  2. Endogenous Metabolite Ferroptosis ROS Kinase Keap1-Nrf2 Reactive Oxygen Species
  3. L-Cystine

L-Cystine  (Synonyms: L-胱氨酸)

目录号: HY-N0394 纯度: 99.84%
COA 产品使用指南 技术支持

L-Cystine 是具有口服活性的 L-Cysteine (HY-Y0337) 的细胞外形式,存在于植物和动物的蛋白质中。L-Cystine 升高 Nrf2 蛋白表达含量并激活Nrf2 转录因子。L-Cystine 减少了 ROS 的产生,并保护细胞免受氧化剂或 Doxorubicin (HY-15142A) 诱导的凋亡 (apoptosis)。L-Cystine 与 L-theanine (HY-15121) 联合使用通过提高谷胱甘肽 (GSH) 水平和 T 辅助细胞2 (Th2) 介导的反应,增强了抗原特异性 IgG 的产生。L-Cystine 有望用于囊性尿症和肾结石的研究。

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L-Cystine Chemical Structure

L-Cystine Chemical Structure

CAS No. : 56-89-3

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Other Forms of L-Cystine:

  • 生物活性

  • 纯度 & 产品资料

  • 参考文献

生物活性

L-Cystine is an orally active extracellular form of L-Cysteine (HY-Y0337), occurring in proteins of plants and animals. L-Cystine elevates Nrf2 protein expression and activates Nrf2 transcription factor. L-cystine reduces ROS generation and protects against oxidant- or Doxorubicin (HY-15142A)-induced apoptosis. L-Cystine combined with L-theanine (HY-15121) enhances the production of antigen-specific IgG by increasing glutathione (GSH) levels and T helper 2 (Th2) mediated responses in mice. L-Cystine is promising for research of cystinuria and kidney stones[1][2][3][4][5][6]

IC50 & Target

Human Endogenous Metabolite

 

细胞效力
(Cellular Effect)
Cell Line Type Value Description References
KB 3-1 IC50
3.12 mM
Compound: cystine
Cytotoxicity against human KB-3-1 cells incubated for 72 hrs by MTT assay
Cytotoxicity against human KB-3-1 cells incubated for 72 hrs by MTT assay
[PMID: 21657271]
KB-V1 IC50
2.14 mM
Compound: cystine
Cytotoxicity against drug-resistant human KBV1 cells expressing P-gp incubated for 72 hrs by MTT assay
Cytotoxicity against drug-resistant human KBV1 cells expressing P-gp incubated for 72 hrs by MTT assay
[PMID: 21657271]
体外研究
(In Vitro)

L-Cystine (83 µM 或 200 µM, 24 或 72 小时) 可有效逆转 Sulfasalazine (HY-14655) 和 Erastin (HY-15763) 在 Huh6 细胞中的生长抑制作用[1]
L-Cystine ( 0.8 mM, 4 小时) 在 HeLa 细胞中以 Keap1 依赖的方式诱导 Nrf2 蛋白表达含量升高[6]

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Cell Viability Assay[1]

Cell Line: Huh6 and Huh7 cells
Concentration: 83 µM or 200 µM
Incubation Time: 72 h or 24 h
Result: The degree of growth inhibition by Sulfasalazine (HY-14655) or Erastin (HY-15763) was greater in medium containing a physiological level of 83 μM L-cystine than in medium containing 200 μM L-cystine in Huh6 and Huh7 cells.

Western Blot Analysis[6]

Cell Line: HeLa cells
Concentration: 0.2 mM
Incubation Time: 4 h
Result: Was sufficient for producing Nrf2 protein elevation at 0.2 mM in HeLa cells.

Western Blot Analysis[6]

Cell Line: HeLa cells
Concentration: 0.8 mM
Incubation Time: 4 h
Result: Induced Nrf2 in a Keap1-dependent manner in HeLa cells.
体内研究
(In Vivo)

L-Cystine (280 mg/kg, 口服, 11 天) 与 L-theanine (HY-15121) 一起给药,部分通过提高小鼠谷胱甘肽 (GSH) 水平和 T helper 2 (Th2) 介导的应答来增强抗原特异性 IgG 的产生[2]
L-Cystine (200 mg/kg, 口服, 11 天) 与 L-theanine (HY-15121) (80 mg/kg, 口服, 11 天) 在 DNP-KLH 抗原刺激后 6 小时显著降低小鼠血清 IL-10/IFN-γ 比值,但在 DNP-KLH 抗原刺激后 24 小时升高血清 IL-10/IFN-γ 比值[2]

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Nine-week-old female BALB/c mice[2]
Dosage: 140, 280 and 560 mg/kg
Administration: p.o. administration for 11 days
Result: Significantly increased IgG and IgM antibody production administrated with L-theanine (HY-15121) after DNP-dextran and DNP-KLH antigenic stimulation in mice.
分子量

240.30

Formula

C6H12N2O4S2

CAS 号
性状

固体

颜色

White to off-white

中文名称

L-胱氨酸

结构分类
初始来源
运输条件

Room temperature in continental US; may vary elsewhere.

储存方式

Please store the product under the recommended conditions in the Certificate of Analysis.

溶解性数据
细胞实验: 

H2O 中的溶解度 : 33.33 mg/mL (138.70 mM; ultrasonic and adjust pH to 11 with 1 M NaOH)

0.1 M NaOH 中的溶解度 : 3.33 mg/mL (13.86 mM; ultrasonic and warming and adjust pH to 11 with NaOH and heat to 70°C)

0.1 M HCL 中的溶解度 : 2.5 mg/mL (10.40 mM; 超声助溶; 酸性条件溶解 (HCL 调节,pH≈2))

DMSO 中的溶解度 : < 1 mg/mL (insoluble or slightly soluble)

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 4.1615 mL 20.8073 mL 41.6146 mL
5 mM 0.8323 mL 4.1615 mL 8.3229 mL
查看完整储备液配制表

* 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。-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。

* 备注:如您选择水作为储备液,请稀释至工作液后,再用 0.22 μm 的滤膜过滤除菌后使用。

  • 摩尔计算器

  • 稀释计算器

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

质量
=
浓度
×
体积
×
分子量 *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start)

C1

×
体积 (start)

V1

=
浓度 (final)

C2

×
体积 (final)

V2

动物溶解方案计算器
请输入动物实验的基本信息:

给药剂量

mg/kg

动物的平均体重

g

每只动物的给药体积

μL

动物数量

由于实验过程有损耗,建议您多配一只动物的量
计算结果
工作液所需浓度 : mg/mL
该产品水溶性佳,请具体参考实测 水 / PBS / Saline 中的溶解度数据。
您所需的储备液浓度超过该产品的实测溶解度,如有需要,请与 MCE 中国技术支持联系。
纯度 & 产品资料

纯度: 99.84%

参考文献

完整储备液配制表

* 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。-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。

可选溶剂 浓度 溶剂体积 质量 1 mg 5 mg 10 mg 25 mg
0.1 M HCL / 0.1 M NaOH / H2O 1 mM 4.1615 mL 20.8073 mL 41.6146 mL 104.0366 mL
5 mM 0.8323 mL 4.1615 mL 8.3229 mL 20.8073 mL
10 mM 0.4161 mL 2.0807 mL 4.1615 mL 10.4037 mL
H2O 15 mM 0.2774 mL 1.3872 mL 2.7743 mL 6.9358 mL
20 mM 0.2081 mL 1.0404 mL 2.0807 mL 5.2018 mL
25 mM 0.1665 mL 0.8323 mL 1.6646 mL 4.1615 mL
30 mM 0.1387 mL 0.6936 mL 1.3872 mL 3.4679 mL
40 mM 0.1040 mL 0.5202 mL 1.0404 mL 2.6009 mL
50 mM 0.0832 mL 0.4161 mL 0.8323 mL 2.0807 mL
60 mM 0.0694 mL 0.3468 mL 0.6936 mL 1.7339 mL
80 mM 0.0520 mL 0.2601 mL 0.5202 mL 1.3005 mL
100 mM 0.0416 mL 0.2081 mL 0.4161 mL 1.0404 mL

* 备注:如您选择水作为储备液,请稀释至工作液后,再用 0.22 μm 的滤膜过滤除菌后使用。

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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产品名称:
L-Cystine
目录号:
HY-N0394
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