polysciences公司23966中英文說明

美國polysciences公司成立于1961年，主要生產(chǎn)和經(jīng)營LIFE SCIENCES生命科學(xué)（膠體金,不含甲醛的甲醇等），病理學(xué)和顯鏡學(xué) 微球和粒子和磁珠各種單體和聚體等產(chǎn)品。polysciences公司是世界上zui大zui全的多聚化合物供應(yīng)商,同時是世界*的免疫學(xué),組織化學(xué)試劑耗材供應(yīng)商.

 轉(zhuǎn)染試劑線性PEI溶液的配制（1mg/ml）

聚乙烯亞胺（Polyethylenimine，PEI）是聚乙烯亞胺是一種具有較高的陽離子電荷密度的有機(jī)大分子，每相隔二個碳個原子，即每“第三個原子都是質(zhì)子化的氨基氮原子，使得聚合物網(wǎng)絡(luò)在任何pH下都能充當(dāng)有效的“質(zhì)子海綿”(proton sponge)體。PEI，可用作轉(zhuǎn)染試劑，它可以縮聚DNA分子形成顆粒并轉(zhuǎn)染真核細(xì)胞。有實(shí)驗(yàn)證明，分子量為25000的線性PEI即Polysciences 23966轉(zhuǎn)染效率zui高。

下面將主要介紹polysciences 線性PEI(#23966)的產(chǎn)品特性及其溶液的配制過程。

1. 產(chǎn)品特性:

產(chǎn)品名稱：線性聚乙烯亞胺(PEI)

2. 溶液配制

此指導(dǎo)說明書是經(jīng)polysciences公司研究，測試及其客戶反饋的后編寫的。下面推薦一種簡單適用而的方法，講述如何配制濃度為1mg/mL的轉(zhuǎn)染試劑的配制。

材料：

1g #23966、1L 純水（Milli-Q®純水，注射用水（WFI），或類似的生物級水）、12 M鹽酸、10 M氫氧化鈉、一次性0.1-0.2µm PES真空無菌過濾器、無菌高聚乙烯或聚丙烯試劑瓶。

器材：

1 L 玻璃燒杯、1 L玻璃量筒、核準(zhǔn)pH計、2支1 mL塑料移液管、托盤、聚四氟乙烯（PTFE）攪拌棒、真空泵

配制過程：

1g #23966——900mL水溶解——攪拌、加熱（60-80°C）——加HCl調(diào)pH到2.0左右——蓋上燒杯，攪拌3h（直至粉末*溶解）——冷卻至室溫——加NaOH調(diào)pH到6.9-7.1——移液到量筒，加水補(bǔ)足至1L——真空過濾消毒——分裝，-20°C保存。

備注：加熱或加酸都有助于PEI溶解。當(dāng)然酸可能不用加那么多，詳細(xì)用量可試加一點(diǎn)攪拌看看，足夠溶解就行，不一定需要加到pH那么低。

試劑儲存：

冷凍部分溶液可在-20°C保存長達(dá)一年；部分解凍的溶液可在4°C保存2周，不可反復(fù)凍融。

粉末儲存：

未開封的粉末有效期兩年?？稍谑覝叵卤４嬷敝潦褂谩?/span>

polysciences公司23966中英文說明

英文說明：

Polyethylenimine, Linear, MW 25000, Transfection Grade (PEI 25K)

DESCRIPTION

PEI 25K is a powerful, trusted, and cost-effective transient transfection reagent. In HEK293 and CHO expression systems, PEI offers consistently high gene expression on a wide scale (96 well plates up to 100 L bioreactors). Each year, more researchers and companies turn to polysciences PEI to gain a critical edge in their work. Relative to most other options, using PEI to prepare transfection reagents in-house can offer as much as a 40% reduction in total transfection costs.

• CAS#: 

• 9002-98-6, 26913-06-4

• Formula: 

• (CH2CH2NH)n

   

• Molecular Weight: 

• 25,000

• Melting Point: 

• 73-75º 

• Soluble In: 

• hot water, cold water at low pH, methanol, and ethanol.
  Insoluble In: benzene, ethyl ether and acetone

• Appearance: 

• White to yellow solid

• Reference(s):

• Siegman S, Truong NF, Segura T. (2015). Encapsulation of PEGylated low-molecular-weight PEI polyplexes in hyaluronic acid hydrogels reduces aggregation. Acta Biomater. in Press, doi:10.1016/j.actbio.2015.09.020

  Baranyi, L. et al. Rapid Generation of Stable Cell Lines Expressing High Levels of Erythropoietin, Factor VIII, and an Antihuman CD20 Antibody Using Lentiviral Vectors. Human Gene Therapy Methods 24, 214–227 (2013). doi:10.1089/hgtb.2013.002

  Wulhfard, S., Baldi, L., Hacker, D. L. & Wurm, F. Valproic acid enhances recombinant mRNA and protein levels in transiently transfected Chinese hamster ovary cells. Journal of Biotechnology 148, 128–132 (2010). doi:10.1016/j.jbiotec.2010.05.003

  Thomas M, Lu JJ, Ge Q, Zhang C, Chen J, Klibanov AM. (2005). Full deacylation of polyethylenimine dramatically boosts its gene delivery efficiency and specificity to mouse lung. Proc Natl Acad Sci U S A.102(16):5679-84.

  DuRocher, Y., Perret, S. & Kamen, A. High-level and high-throughput recombinant protein production by transient transfection of sUSPension-growing human 293-EBNA1 cells. Nucleic acids research 30, E9 (2002). doi:10.1093/nar/30.2.e9

• TSCA 

•  

• Hazards: 

• Unknown

• Handling: 

• Gloves & fume hood

• Storage: 

• Store at room temperature

MSDS / TECHNICAL DATA SHEETS / PRODUCT LITERATURE

• MSDSMaterial Safety Datasheet 23966 (PDF)

• DATATransfection Reagent Preparation and Storage Recommendations

• DATAExample COA

• LITBSE/TSE Statement

RELATED PRODUCTS

1. Transporter 5™ Transfection Reagent

2. PEI MAX - Transfection Grade Linear Polyethylenimine Hydrochloride (MW 40,000)

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