Fucoxanthin   中文名称: 岩藻黄质

PPARγ; PPARα; UCP1; SOD; iNOS; Caspase 3/8/9;ERK2

本研究探讨了海洋类胡萝卜素Fucoxanthin/岩藻毒素对结核分枝杆菌（Mtb）临床分离株的抗结核特性。选择参与Mtb细胞壁生物合成的两种重要酶，UDP吡喃半乳糖变位酶（UGM）和芳胺-N-乙酰基转移酶（TBNAT）作为药物靶点，以揭示岩藻毒素抗结核作用的机制。所得结果表明，与标准药物异烟肼（INH）相比，岩藻毒素对所有测试的结核分枝杆菌菌株均显示出明显的抑菌作用，最低抑菌浓度（MIC）范围为2.8至4.1µM，基于细胞毒性评估，选择性指数良好（范围为6.1至8.9）。岩藻毒素和标准尿苷-5'-二磷酸对UGM的强效抑制作用分别为98.2%和99.2%。岩藻毒素能有效灭活TBNAT（半数最大抑制浓度（IC50）=4.8µM；99.1%的抑制率）与INH相比（IC50=5.9µM；97.4%的抑制）。此外，还实现了分子对接方法，以认可和合理化生物学发现，并设想结构-活性关系。由于过去十年的临床证据证实了细菌感染与自身免疫性疾病之间的相关性，在这项研究中，我们根据之前的临床观察和动物研究讨论了结核分枝杆菌感染与自身抗体疾病之间的联系。总之，我们提出，岩藻毒素通过抑菌作用作用于多个靶点以及抑制UGM和TBNAT，对治疗结核病具有巨大的治疗价值。这些结果可能导致避免或降低遗传易感宿主对与结核分枝杆菌感染相关的自身免疫性疾病的易感性。[1]

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Fucoxanthin/岩藻毒素IC50分别为1445和1641µM（Hela和SiHa细胞）。芯片结果显示，与未处理的SiHa细胞相比，岩藻毒素处理的SiHa细胞中有2255个DEGs，包括943个上调基因和1312个下调基因。疾病和功能分析表明，这些DEG主要与癌症和组织损伤和异常有关，在线综合通路分析表明，DEG主要富集p53信号传导。HIST1H3D在岩藻毒素的作用下显著下调。抑制HIST1H3D mRNA显著降低了细胞增殖和集落形成，显著增加了凋亡的HeLa和SiHa细胞的百分比，细胞被阻滞在G0/G1细胞周期期。 结论：HIST1H3D可能是宫颈癌发生过程中的癌基因，也是治疗宫颈癌症的一个潜在的岩藻红靶点。[2]

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Fucoxanthin是一种从褐藻中提取的天然类胡萝卜素，它抑制了人类神经母细胞瘤细胞系GOTO细胞的生长。在药物治疗后第3天，10微克/毫升的岩藻黄素将GOTO细胞的生长率降低到对照组的38%。流式细胞术分析显示，岩藻毒素导致细胞周期阻滞在G0-G1期。在10微克/毫升的浓度下处理4小时后，岩藻毒素就证明N-myc基因的表达降低，这可能对类胡萝卜素的抗增殖作用机制很重要[3]。

本研究旨在探讨岩藻黄素/Fucoxanthin对内毒素诱导的大鼠葡萄膜炎（EIU）的疗效。研究了岩藻毒素对内毒素诱导的白细胞和蛋白质浸润、大鼠房水中一氧化氮（NO）、前列腺素（PG）-E2和肿瘤坏死因子（TNF）-α浓度的影响，以及对小鼠巨噬细胞系（RAW 264.7细胞）中环氧化酶（COX）-2和诱导型一氧化氮合酶（iNOS）蛋白表达的影响。通过足垫注射脂多糖（LPS）在雄性Lewis大鼠中诱导EIU。注射LPS后，立即静脉注射0.1、1或10mg（-1）的岩藻毒素。24小时后从双眼收集房水，并测量渗入房水的细胞数量和房水蛋白质浓度。通过酶联免疫吸附试验测定PGE2、NO和TNF-α的水平。RAW 264.7细胞用不同浓度的岩藻毒素预处理24小时，随后用LPS孵育24小时。通过Western印迹法分析COX-2和iNOS蛋白的表达。测定PGE2、NO和TNF-α的产生水平。Fucoxanthin以剂量依赖的方式抑制EIU的发展。用岩藻毒素治疗导致房水中PGE2、NO和TNF-α浓度降低。与LPS组相比，岩藻毒素处理的RAW264.7细胞中COX和iNOS蛋白的表达显著降低。它还显著降低了细胞培养基中PGE2、NO和TNF-α的产生浓度。目前的结果表明，岩藻毒素通过阻断iNOS和COX-2蛋白的表达来抑制EIU的炎症，其对眼睛的抗炎作用与类似剂量的泼尼松龙的作用相当。[8]

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肾脏镉水平变化[9]
为了评估镉暴露对肾功能的影响，我们首先检测了未服用CdCl2的对照组肾脏中的基本镉水平。对照组的结果仅为5.28±0.45 ng/mL（修订后的表2）。CdCl2治疗，但没有岩藻黄素作为阴性对照组（NCG），显著增加了肾脏镉水平（P<0.05）。与NCG和10（F1）mg/kg bw/天岩藻毒素治疗组相比，以参复康片作为阳性对照的治疗大大降低了肾镉水平（P<0.05）。相比之下，25（F2）和50（F3）mg/kg bw/天的岩藻毒素处理阻断了镉诱导的镉水平升高（与NCG相比，P<0.05），而F2和F3组的肾镉水平明显低于PCG（P<0.05）。这些结果表明，以25或50 mg/kg bw/天的剂量补充岩藻毒素可促进肾脏镉代谢，对镉积累的改善效果优于参复康片。

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肾损伤标志物水平的变化[9]
为了探索这些生理变化的分子机制，我们研究了肾损伤相关的生物标志物（修订后的表3）。结果显示，CdCl2处理组（NCG）的血浆BUN、KIM-1和NGAL水平显著高于未处理CdCl2的对照组（P<0.05）。与NCG相比，参复康片（PCG）、25（F2）和50（F3）mg/kg bw/天的岩藻黄素显著降低了BUN水平（P<0.05）。F2组、F3组和PCG组的BUN水平与对照组相比没有显著差异（P>0.05）。与NCG相比，参复康片和岩藻毒素治疗显著降低了KIM-1水平（P<0.05）。F2组的KIM-1水平与对照组没有显著差异（P>0.05），表明补充25mg/kg bw/天的岩藻毒素可以将KIM-1水平降至正常值。与NCG组相比，参复康片和岩藻毒素治疗显著降低了NGAL水平（P<0.05）。PCG组NGAL水平与对照组无显著差异（P>0.05），表明补充参复康片可以将NGAL水平降至正常值。

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岩藻黄素对CdCl2处理过的胶束中抗氧化剂的影响[9]
为了评估岩藻黄素在抗氧化应激中的作用，我们检测了脂质过氧化途径中的一些关键酶水平。与对照组相比，NCG小鼠肾脏POD、SOD、CAT和APX的活性显著降低（P<0.05）。和NCG小鼠相比，岩藻黄素和参复康片治疗显著改善了氧化还原状态。与对照组相比，用中等（F2）和高（F3）浓度的岩藻毒素给药的小鼠POD、SOD、CAT和APX活性显著提高。PCG和NCG的肾CAT和APX活性没有显著差异（P>0.05）。在F2和F3组中，肾脏CAT活性显著高于NCG（P<0.05），与对照组相比没有显著差异（P>0.05）。F2和F3组的肾APX活性显著高于NCG（P<0.05），但在F3组，与对照组相比没有显著差异（P>0.05），表明25和50 mg/kg bw/天的岩藻毒素治疗在增加CAT和APX活性方面比参复康片效果更好（图6）。

UGM活性[4]
UGM活动已按照之前的规定完成岩藻黄素和标准UGM抑制剂尿苷-5'-二磷酸在DMSO中制备（所有进行的反应均使用2%（v/v）的DMSO）。简而言之，在缓冲液（100 mM 3-（N-吗啉代）丙磺酸（MOPS））中制备的UGM（25µg/mL）；pH=8.0）与Na2S2O3（20 mM）在冰上预孵育1分钟。此外，将溶液混合物与测试抑制剂（20 mmol）孵育，然后在25°C下加入底物UDP-Galf（60µM）。随后，通过加入冰冷的HCl在不同时间停止反应，并直接在液氮中快速冷冻。UGM在2%（v/v）DMSO存在下的活性被视为对照。采用高效液相色谱（HPLC）系统监测UGM活性，根据详细程序跟踪所有仪器设置和操作要求。通过比较底物和产物峰的积分来测量转化程度。

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TBNAT活性[4]
对基于微孔板光度计的测定方法进行了轻微的改进，以确定TBNAT催化的反应。通过用5,5′-二硫代双（2-硝基苯甲酸）（DTNB）检测乙酰辅酶A（AcCoA）的水解速率来检测TBNAT活性，并在405nm处记录吸光度。总之，制备了测试分子（岩藻黄素和标准INH）并将其溶解在DMSO中，所有反应都在DMSO（2%；v/v）的存在下进行。TBNAT（170 ng；在20 mM Tris-HCl（pH=8）中制备，与二硫苏糖醇（1 mM）和5%甘油混合）在25°C下与测试化合物（5µL，终浓度范围为10至20µM）一起孵育15分钟。此外，将15µL底物肼屈嗪（30µM）和12µL乙酰辅酶a（30µM）与获得的混合溶液混合。随后，在25°C下10分钟后，使用25µL DTNB（在pH=7.3的盐酸胍（6.4 M）和Tris-HCl（100 mM）中处理）停止反应，并将酶活性作为终点读数分析。TBNAT催化的反应（无抑制）被指定为对照。抑制百分比被确定为酶活性（表示为与测试分子形成辅酶A的速率）与没有抑制的对照活性的比率。通过非线性拟合抑制剂的抑制百分比和对数浓度与反应得到的抑制曲线用于评估IC50值。

最低抑菌浓度（MIC）评估[4]
如CLSI指南中所述，通过微量稀释法评估了岩藻黄质和INH的最小抑制浓度。阴性对照被指定为二甲亚砜（DMSO）和肉汤。在这里，使用1%的DMSO溶解和稀释测试化合物，并进一步与肉汤混合（25µL DMSO溶液在5mL肉汤中）。使用1%的DMSO对Mtb的生长没有影响。孔中受试物质的最终浓度范围为2.8至6.2µM。孵育24小时后，记录结果并表示为微摩尔尺度的最小抑菌浓度（MIC），该浓度阻碍了蓝色到粉红色的颜色变化。

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细胞毒性分析[4]
细胞系和培养要求[4]
正常人胎儿肺成纤维细胞在37°C下，在添加了10%胎牛血清、2 mM L-谷氨酰胺溶液和1%非必需氨基酸溶液的最低必需鹰培养基MEM中，在5%CO2的加湿状态下培养。随后，在37°C下用胰蛋白酶/EDTA处理后收集细胞进行传代培养。

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细胞毒性评估[4]
使用CellTiter-96测定法评估了岩藻黄素和INH的潜在细胞毒性。该测定基于活细胞中四唑染料MTS还原为甲氮，然后按照迄今为止报道的程序进行比色测定。用测试化合物处理的MRC-5细胞作为研究组，而未处理的MRC-3细胞作为对照组。在490nm处检测测试样品的吸光度，并使用孵育浓度与相对于未处理对照的吸光度百分比绘制每种化合物的抑制曲线。通过抑制曲线的非线性回归分析确定半最大抑制浓度（IC50）。PRISM软件辅助统计分析。

Animals groups and EIU [8]
Eight-week-old male Lewis rats were used. The rats weighed about 250 g. EIU was induced by injection into one footpad of 200 μg of LPS from Salmonella typhimurium that had been diluted in 0.2 ml of saline. The rats were injected intravenously with 0.1, 1 or 10 mg kg−1 Fucoxanthin or 10 mg kg−1 prednisolone in a 0.1% dimethyl sulfoxide solution (Sigma, St. Louis, MO) mixed with 0.1 ml phosphate-buffered saline (PBS). Fucoxanthin was isolated from brown algae using a previously published method (Britton, 1995). Fucoxanthin was administered three times; simultaneously and 30 min before and after the LPS injection. For the LPS group, 0.1% dimethyl sulfoxide of PBS was administered intravenously using the same schedule for the fucoxanthin-administered group. In the control group, neither LPS nor fucoxanthin was injected into the rats.

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Experimental Design [9]
Total animals (N = 120) were randomly divided into two groups of equal average body weight. The mice of the control group (N = 20) were given pure water only, whereas the animals of the cadmium exposure group (N = 100) were given CdCl2 orally at a dose of 30 milligram (mg)/kilogram (kg) body weight (bw)/day for 30 days. In this study, Fucoxanthin was administered at 10, 25 and 50 mg/kg bw/day. To evaluate ameliorative effects of fucoxanthin on the kidney, the cadmium exposure group was divided into the following five subgroups: without fucoxanthin treatment as a negative control group (NCG, N = 20); positive control group (PCG, N = 20) was mice received Shenfukang tablets orally at a dose of 50 mg/kg bw/day for 14 days; low (F1), medium (F2), and high (F3) fucoxanthin concentration treated mice (N = 20 mice at each group) were received fucoxanthin orally at a dose of 10, 25, and 50 mg/kg bw/day for 14 days, respectively.

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Animal Sacrifice and Sample Collection [9]
After the 14-day Fucoxanthin treatment, mice were sacrificed. Kidney tissues and peripheral blood samples were collected directly. In each group, kidney samples of 14 mice were subsequently kept at −80°C in ultra cold storage freezer for analyses of cadmium concentration, antioxidant activity and relative gene expression; 3 mice were kept at 4°C in 10% neutral-buffered formalin for microscopic observation; and 3 mice were kept at 4°C in 2.5% neutral-buffered glutaraldehyde for electron microscope observation. As for the blood samples, they were added to the test tubes with anticoagulant, centrifuged for 5 minutes at a speed of 1372 g, and the upper plasma was collected for analysis of kidney damage.

[1]. Anti-obesity activity of the marine carotenoid fucoxanthin. Mar Drugs. 2015 Apr 13;13(4):2196-214.

[2]. Fucoxanthin, a Marine-Derived Carotenoid from Brown Seaweeds and Microalgae: A Promising Bioactive Compound for Cancer Therapy. Int J Mol Sci. 2020;21(23):9273.

[3]. In Vivo and in Vitro Toxicity Studies of Fucoxanthin, a Marine Carotenoid. null. 2011;0 (0):319-328.

[4]. A Microbiological, Toxicological, and Biochemical Study of the Effects of Fucoxanthin, a Marine Carotenoid, on Mycobacterium tuberculosis and the Enzymes Implicated in Its Cell Wall: A Link Between Mycobacterial Infection and Autoimmune Diseases. Mar Drugs. 2019 Nov 14;17(11):641.

[5]. Fucoxanthin may inhibit cervical cancer cell proliferation via downregulation of HIST1H3D. J Int Med Res. 2020 Oct;48(10):300060520964011.

[6]. Inhibitory effects of fucoxanthin, a natural carotenoid, on N-myc expression and cell cycle progression in human malignant tumor cells. Cancer Lett. 1990 Nov 19;55(1):75-81.

[7]. Anti-adult T-cell leukemia effects of brown algae fucoxanthin and its deacetylated product, fucoxanthinol. Int J Cancer. 2008 Dec 1;123(11):2702-12.

[8]. Effects of fucoxanthin on lipopolysaccharide-induced inflammation in vitro and in vivo. Exp Eye Res. 2005 Oct;81(4):422-8.

[9]. Role of Fucoxanthin towards Cadmium-induced renal impairment with the antioxidant and anti-lipid peroxide activities. Bioengineered. 2021 Dec;12(1):7235-7247.

Fucoxanthin is an epoxidized carotenoid found in brown algae, possessing anticancer, antidiabetic, antioxidant, and neuroprotective effects. It is an algal metabolite, a CFTR enhancer, a food antioxidant, a neuroprotective agent, a hypoglycemic agent, an apoptosis inhibitor, a hepatoprotective agent, a marine metabolite, and a plant metabolite. It is an epoxidized carotenoid, an acetate, a secondary alcohol, a tertiary alcohol, and also a propadiene compound. Fucoxanthin is currently being investigated in the clinical trial NCT03613740 (Effects of fucoxanthin on metabolic syndrome components, insulin sensitivity, and insulin secretion). Fucoxanthin is a marine carotenoid primarily found in brown algae, giving the algae their brown or olive-green color. Fucoxanthin has attracted considerable attention due to its anti-inflammatory, analgesic, and anticancer effects. In vivo studies have shown that oral administration of fucoxanthin can inhibit carcinogenesis in animal models of duodenal cancer, skin cancer, colon cancer, and liver cancer. Fucoxanthin exerts its antitumor and anticancer effects by regulating the expression of various cellular molecules and cell signal transduction pathways, inducing G1 phase cell cycle arrest and apoptosis, but its exact anticancer mechanism is not fully elucidated. Fucoxanthin can regulate lipid metabolism, and its mechanism of action is likely mediated by AMK-activated protein kinases. A clinical trial on fucoxanthin for the treatment of non-alcoholic fatty liver disease is underway. Fucoxanthin has been reported to be present in Jania, Corbicula sandai, and other organisms with relevant data. Objective: To investigate the roles of fucoxanthin (reported to have significant anticancer effects) and histone cluster 1 H3 family member D (HIST1H3D; associated with tumorigenesis) in cervical cancer. Methods: The half-maximal inhibitory concentration (IC50) of fucoxanthin against HeLa and SiHa cervical cancer cells was determined. Differentially expressed genes (DEGs) in SiHa cells treated with IC50 concentrations of fucoxanthin were screened using high-throughput technology, and signal enrichment analysis was performed. After identifying HIST1H3D as a candidate gene, a HIST1H3D knockdown model was constructed by transfecting a short hairpin HIST1H3D payload. This study investigated the effects of fucoxanthin on cell proliferation, cell cycle distribution, colony formation, and apoptosis. The results showed that the IC50 values of fucoxanthin for HeLa cells and SiHa cells were 1445 µM and 1641 µM, respectively. Microarray analysis revealed 2255 differentially expressed genes (DEGs) in SiHa cells treated with and untreated with fucoxanthin, of which 943 genes were upregulated and 1312 genes were downregulated. Disease and functional analyses indicated that these differentially expressed genes were mainly associated with cancer, systemic damage, and abnormalities. Online integrated pathway analysis showed that these differentially expressed genes were mainly enriched in the p53 signaling pathway. Fucoxanthin treatment significantly downregulated the expression of HIST1H3D. Inhibition of HIST1H3D mRNA significantly reduced cell proliferation and colony formation, significantly increased the apoptosis rate of HeLa and SiHa cells, and caused cell cycle arrest at the G0/G1 phase. [5] Fucoxanthin is a natural carotenoid extracted from brown algae that can inhibit the growth of human neuroblastoma cell line GOTO cells. After treatment with fucoxanthin at a concentration of 10 μg/ml for 3 days, the growth rate of GOTO cells decreased to 38% of the control group. Flow cytometry analysis showed that fucoxanthin caused cell cycle arrest at the G0/G1 phase. At a concentration of 10 μg/ml, treatment with fucoxanthin for 4 hours reduced the expression of N-myc gene, which may be an important part of the anti-proliferative mechanism of this carotenoid. [6] Adult T-cell leukemia (ATL) is a fatal malignant tumor of T lymphocytes caused by human T-cell leukemia virus type 1 (HTLV-1) infection, which is currently incurable. Carotenoids are a class of natural pigments with a variety of biological functions. Among carotenoids, fucoxanthin is known to possess antitumor activity, but its exact mechanism of action remains unclear. We evaluated the anti-ATL activity of fucoxanthin and its metabolite fucoxanthinol. Both carotenoids inhibited the viability of HTLV-1-infected T cell lines and ATL cells, with fucoxanthinol exhibiting approximately twice the inhibitory potency of fucoxanthin. In contrast, other carotenoids, such as β-carotene and astaxanthin, showed weaker inhibitory effects on HTLV-1-infected T cell lines. Notably, uninfected cell lines and normal peripheral blood mononuclear cells were resistant to both fucoxanthin and fucoxanthinol. Both carotenoids led to cell cycle arrest in the G1 phase by reducing the expression of cyclins D1, D2, CDK4, and CDK6, and inducing GADD45α expression; they also induced apoptosis by reducing the expression of Bcl-2, XIAP, cIAP2, and survivin. The induced apoptosis was associated with the activation of caspase-3, -8, and -9. Fucoxanthin and fucoxanthin alcohol also inhibit the phosphorylation of IκBα and the expression of JunD, thereby leading to the inactivation of nuclear factor-κB and activator protein-1. Tumors were induced in mice with severe combined immunodeficiency after T cells infected with HTLV-1, and fucoxanthin alcohol treatment inhibited tumor growth and was widely distributed in tissues, reaching therapeutically effective serum concentrations. Our preclinical data suggest that fucoxanthin and fucoxanthin alcohol may be potential effective drugs for the treatment of adult T-cell leukemia/lymphoma (ATL) patients. [7] Cadmium-induced kidney injury is considered one of the most dangerous consequences for humans. This study aimed to investigate the protective effect of fucoxanthin supplementation on a mouse model of cadmium-induced kidney injury. It was observed that the cross-sectional area of glomeruli in mice treated with cadmium chloride (CdCl2) was significantly reduced. Cadmium exposure also disrupts the structural integrity of mitochondria and leads to elevated levels of blood urea nitrogen (BUN), kidney injury molecule 1 (KIM1), and neutrophil gelatinase-associated lipocalin (NGAL). The levels of peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) were significantly reduced in cadmium-exposed mice. The expression of caspase3, caspase8, and caspase9 genes associated with apoptosis was significantly increased in kidney tissue. Mice treated with cadmium chloride (CdCl2) were orally administered 50 mg/kg of shenfukang, 10 mg/kg, 25 mg/kg, and 50 mg/kg of fucoxanthin for 14 consecutive days. The results showed that high-dose fucoxanthin administration significantly reduced the levels of BUN, KIM1, and NGAL, and increased the levels of POD, SOD, CAT, and ascorbate APX. Fucoxanthin administration also promoted the recovery of renal function, microstructure, and ultrastructure of renal cells. In summary, the ameliorative effect of fucoxanthin supplementation on cadmium-induced kidney injury is achieved by inhibiting oxidative stress and apoptosis and promoting the recovery of mitochondrial structural integrity. [9]

C42H58O6

658.92

676.433

C, 76.56; H, 8.87; O, 14.57

3351-86-8

5281239

Pink to red solid powder

1.1±0.1 g/cm3

786.5±60.0 °C at 760 mmHg

166-168ºC

228.5±26.4 °C

0.0±6.2 mmHg at 25°C

1.563

7.7

96.36

2

6

12

48

1530

5

O=C(/C(C)=C/C=C/C(C)=C/C=C/C=C(C)/C=C/C=C(C)/C([H])=[C@@]=C([C@@]1(O)C)C(C)(C[C@H](OC(C)=O)C1)C)C[C@]2(C3(C)C)[C@@](C)(C[C@@H](O)C3)O2

InChI=1S/C42H58O6/c1-29(18-14-19-31(3)22-23-37-38(6,7)26-35(47-33(5)43)27-40(37,10)46)16-12-13-17-30(2)20-15-21-32(4)36(45)28-42-39(8,9)24-34(44)25-41(42,11)48-42/h12-22,34-35,44,46H,24-28H2,1-11H3/b13-12+,18-14+,20-15+,29-16+,30-17+,31-19+,32-21+/t23?,34-,35-,40+,41+,42-/m0/s1

InChI=1S/C42H58O6/c1-29(18-14-19-31(3)22-23-37-38(6,7)26-35(47-33(5)43)27-40(37,10)46)16-12-13-17-30(2)20-15-21-32(4)36(45)28-42-39(8,9)24-34(44)25-41(42,11)48-42/h12-22,34-35,44,46H,24-28H2,1-11H3/b13-12+,18-14+,20-15+,29-16+,30-17+,31-19+,32-21+/t23?,34-,35-,40+,41+,42-/m0/s1

C/C(=C\C=C\C=C(/C)\C=C\C=C(/C)\C(=O)C[C@]12[C@](O1)(C[C@H](CC2(C)C)O)C)/C=C/C=C(\C)/C=C=C3[C@](C[C@H](CC3(C)C)OC(=O)C)(C)O

α-Carotene; 3351-86-8; all-trans-Fucoxanthin; CCRIS 4055; Sebatrol; 06O0TC0VSM; BRN 0073179; CHEBI:5186; Fucoxanthin

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : ~12.5 mg/mL (~18.97 mM)

配方 1 中的溶解度: 1.25 mg/mL (1.90 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (这些助溶剂从左到右依次添加，逐一添加), 悬浮液；超声助溶。
例如，若需制备1 mL的工作液，可将100 μL 12.5mg/mL澄清的DMSO储备液加入到900μL 20％SBE-β-CD生理盐水中，混匀。
*20% SBE-β-CD 生理盐水溶液的制备（4°C，1 周）：将 2 g SBE-β-CD 溶解于 10 mL 生理盐水中，得到澄清溶液。

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请根据您的实验动物和给药方式选择适当的溶解配方/方案：
1、请先配制澄清的储备液(如：用DMSO配置50 或 100 mg/mL母液(储备液));
2、取适量母液，按从左到右的顺序依次添加助溶剂，澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明，并不一定代表此产品 的实际溶解配方):
10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline);
假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀/澄清；向上述体系中加入50 μL Tween-80，混合均匀/澄清；然后继续加入450 μL ddH2O (或 saline)定容至 1 mL；
3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例;
4、 如产品在配制过程中出现沉淀/析出，可通过加热(≤50℃)或超声的方式助溶;
5、为保证最佳实验结果，工作液请现配现用！
6、如不确定怎么将母液配置成体内动物实验的工作液，请查看说明书或联系我们;
7、 以上所有助溶剂都可在 Invivochem.cn网站购买。