Laminaran(Synonyms: 昆布多糖)

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Laminaran (Synonyms: 昆布多糖)

Laminaran 是一种 β-1-3-葡聚糖，源于 Eisenia Bicyclis，Dectin-1 的典型配体，具有免疫调节，辐射防护作用以及抗癌活性。 Laminaran 由具有 β (1→6) 分支的 β (1→3)-葡聚糖组成，可以被葡糖酶诸如 (EC 3.2.1.6) 之类的酶催化，该酶会破坏 β (1→3) 键。 Laminaran 是一种有前途的免疫刺激分子，用于癌症免疫的研究。

Laminaran(Synonyms: 昆布多糖)

Laminaran Chemical Structure

CAS No. : 9008-22-4

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生物活性

Laminaran is an β-1-3-glucan and a typical ligand for Dectin-1 from Eisenia Bicyclis, has potent immunomodulating, radioprotective, and anticancer activities[1]. Laminaran is made up of β (1→3)-glucan with β (1→6)-branches and can be catalyzed by enzymes such as laminarinase (EC 3.2.1.6) that breaks the β (1→3) bonds[2]. Laminaran is a promising immune stimulatory molecule for use in cancer immunotherapy[3].

体外研究
(In Vitro)

Laminaran (100-800 µg/mL; 24 hours) is not cytotoxic against normal epidermal cells JB6 Cl41 and human melanoma cells SK-MEL-28, the percentage of inhibition of living cells number is less than 15 % at concentrations range up to 800 µg/mL after 24 h of treatment[1].
Laminaran (200 µg/mL; 24-72 hours)does not cause any growth inhibition of SK-MEL-28 cells after 24 and 48 h of treatment, but decreases cells proliferation by 36 % after 72 h of treatment[1].
Laminaran (25-50 µg/mL; 24 hours) at low concentration does not influence the phosphorylation of c-Raf (Ser259), ERK1/2 (Tyr202/Tyr204), and MEK1/2 (Ser 221) kinases as well as total expression level of investigated proteins. But decreases p-MEK, p-ERK1/2 at 50 µg/mL[1].

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.

Cell Viability Assay[1]

Cell Line: JB6 Cl41 and SK-MEL-28 cells
Concentration: 100, 200, 400, and 800 µg/mL
Incubation Time: 24 hours
Result: Showed no cytotoxic against normal epidermal cells JB6 Cl41 and human melanoma cells SK-MEL-28.

Cell Proliferation Assay[1]

Cell Line: SK-MEL-28 cells
Concentration: 200 µg/mL
Incubation Time: 24 hours
Result: Decreased cell proliferation at 72 hours.

Western Blot Analysis[1]

Cell Line: SK-MEL-28 cells
Concentration: 25 µg/mL; 50 µg/mL
Incubation Time: 24 hours
Result: Inhibited phosphorylation of c-Raf, MEK1/2, and ERK1/2 kinases.

体内研究
(In Vivo)

Laminaran (intravenous injection; 12.5, 25, and 50 mg/kg; 21 days) and OVA (50 μg) combination significanly decreases the tumor masses when it compares with the PBS-, OVA-, and laminarin-treated mice[3].

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: C57BL/6 mice injected s.c. with B16-OVA cells[3]
Dosage: 12.5, 25, and 50 mg/kg; 21 days
Administration: Intravenous injection
Result: Prevented B16-OVA tumor growth by inducing Ag-specific immune responses.

CAS 号

9008-22-4
中文名称

昆布多糖；褐藻淀粉
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
溶解性数据
In Vitro: 

DMSO : 100 mg/mL (Need ultrasonic)

H2O : 100 mg/mL (Need ultrasonic)

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    90% (20% SBE-β-CD in saline)

    Solubility: ≥ 2.5 mg/mL (Infinity mM); Clear solution

    此方案可获得 ≥ 2.5 mg/mL (Infinity 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 μL 20% 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
  • 2.

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

    Solubility: ≥ 2.5 mg/mL (Infinity mM); Clear solution

    此方案可获得 ≥ 2.5 mg/mL (Infinity 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 上海金畔生物科技有限公司 网站选购。
参考文献

  • [1]. Malyarenko OS, et al. Laminaran from brown alga Dictyota dichotoma and its sulfated derivative as radioprotectors and radiosensitizers in melanoma therapy.Carbohydr Polym. 2019 Feb 15;206:539-547.

    [2]. Laminaran 

    [3]. Song K, et al. Laminarin promotes anti-cancer immunity by the maturation of dendritic cells.Oncotarget. 2017 Jun 13;8(24):38554-38567.

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