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纯度 | >97%SDS-PAGE. |
种属 | Human |
靶点 | IL21 |
Uniprot No | Q9HBE4 |
内毒素 | < 0.01EU/μg |
表达宿主 | E.coli |
表达区间 | 23-155aa |
氨基酸序列 | QGQDRHMIRM RQLIDIVDQL KNYVNDLVPE FLPAPEDVET NCEWSAFSCF QKAQLKSANT GNNERIINVS IKKLKRKPPS TNAGRRQKHR LTCPSCDSYE KKPPKEFLER FKSLLQKMIH QHLSSRTHGS EDS |
预测分子量 | 15.4 kDa |
蛋白标签 | His tag N-Terminus |
缓冲液 | PBS, pH7.4, containing 0.01% SKL, 1mM DTT, 5% Trehalose and Proclin300. |
稳定性 & 储存条件 | Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months. |
复溶 | Always centrifuge tubes before opening.Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles. |
以下是关于IL-21重组蛋白的示例参考文献(内容为模拟概括,实际文献需通过学术数据库检索确认):
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1. **标题**:*IL-21 enhances antitumor immune responses through direct activation of CD8+ T cells*
**作者**:Casey, K.A. et al.
**摘要**:研究证明重组IL-21蛋白通过直接激活CD8+ T细胞,显著增强抗肿瘤免疫反应,并在黑色素瘤小鼠模型中抑制肿瘤生长。
2. **标题**:*Recombinant IL-21 synergizes with anti-PD-1 therapy to improve NK cell-mediated tumor control*
**作者**:Davis, M.R. et al.
**摘要**:发现重组IL-21可增强NK细胞功能,并与PD-1抑制剂协同作用,提升实体瘤治疗的疗效,提出联合疗法的潜在临床价值。
3. **标题**:*IL-21 as a vaccine adjuvant: Induction of durable T cell responses in primates*
**作者**:Thompson, J.A. et al.
**摘要**:评估重组IL-21作为疫苗佐剂的效果,证明其能显著延长非人灵长类动物中抗原特异性T细胞应答,为感染性疾病疫苗开发提供依据。
4. **标题**:*Structure-function analysis of recombinant IL-21 and its receptor binding mechanism*
**作者**:Wang, L. et al.
**摘要**:通过晶体学解析重组IL-21蛋白结构,揭示其与IL-21受体结合的分子机制,为优化工程化IL-21变体奠定基础。
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**说明**:以上为模拟简化版文献摘要,实际研究中建议通过PubMed、Google Scholar等平台检索关键词“recombinant IL-21”或“IL-21 protein therapy”获取具体文献。
Interleukin-21 (IL-21) is a pleiotropic cytokine belonging to the common gamma-chain (γc) receptor family, which includes cytokines like IL-2. IL-4. and IL-7. It was first identified in the early 2000s and is primarily produced by activated CD4+ T cells, particularly follicular helper T cells (Tfh), and natural killer T (NKT) cells. IL-21 plays a critical role in modulating both innate and adaptive immune responses by binding to its heterodimeric receptor complex composed of the IL-21 receptor (IL-21R) and the γc subunit. This interaction triggers downstream signaling pathways, such as JAK-STAT, MAPK, and PI3K, influencing cellular proliferation, differentiation, and survival.
Recombinant IL-21 protein is engineered using genetic recombination techniques, typically expressed in mammalian cell systems (e.g., CHO or HEK293 cells) or prokaryotic systems like *E. coli*, followed by purification to ensure bioactivity. Its therapeutic potential stems from its ability to enhance cytotoxic T cell and NK cell functions, promote B cell differentiation into plasma cells, and regulate autoimmune responses. These properties have spurred research in cancer immunotherapy, particularly in combination with checkpoint inhibitors or adoptive cell therapies, as well as in treating viral infections and autoimmune disorders.
Preclinical studies highlight IL-21's dual role: it can suppress tumor growth by boosting antitumor immunity but may also exacerbate inflammation in autoimmune settings. Clinical trials have explored its efficacy in malignancies like melanoma and renal cell carcinoma, though challenges such as cytokine release syndrome and dose-dependent toxicity remain. Ongoing research focuses on optimizing delivery methods, including engineered fusion proteins or gene therapy, to harness its immunomodulatory effects while minimizing adverse outcomes. As a versatile tool, recombinant IL-21 continues to offer insights into immune regulation and therapeutic development.
在生物科技领域,蛋白研发与生产是前沿探索的关键支撑。艾普蒂作为行业内的创新者,凭借自身卓越的研发实力,每年能成功研发 1000 多种全新蛋白,在重组蛋白领域不断突破。 在重组蛋白生产过程中,艾普蒂积累了丰富且成熟的经验。从结构复杂的跨膜蛋白,到具有特定催化功能的酶、参与信号传导的激酶,再到用于免疫研究的病毒抗原,艾普蒂都能实现高效且稳定的生产。 这一成就离不开艾普蒂强大的技术平台。我们构建了多元化的重组蛋白表达系统,昆虫细胞、哺乳动物细胞以及原核蛋白表达系统协同运作。不同的表达系统各有优势,能够满足不同客户对重组蛋白的活性、产量、成本等多样化的需求,从而提供高品质、低成本的活性重组蛋白。 艾普蒂提供的不只是产品,更是从源头到终端的一站式解决方案。从最初的基因合成,精准地构建出符合要求的基因序列,到载体构建,为蛋白表达创造适宜的环境,再到蛋白质表达和纯化,每一个环节都严格把控。我们充分尊重客户的个性化需求,在表达 / 纯化标签的选择、表达宿主的确定等方面,为客户量身定制专属方案。 同时,艾普蒂还配备了多种纯化体系,能够应对不同特性蛋白的纯化需求。这种灵活性和专业性,极大地提高了蛋白表达和纯化的成功率,让客户的研究项目得以顺利推进,在生物科技的探索道路上助力每一位科研工作者迈向成功。
艾普蒂生物自主研发并建立综合性重组蛋白生产和抗体开发技术平台,包括: 哺乳动物细胞表达平台:利用哺乳动物细胞精准修饰蛋白,产出与天然蛋白相似的重组蛋白,用于药物研发、细胞治疗等。 杂交瘤开发平台:通过细胞融合筛选出稳定分泌单克隆抗体的杂交瘤细胞株,优化后的技术让抗体亲和力与特异性更高,应用于疾病诊断、免疫治疗等领域。 单 B 细胞筛选平台:FACS 用荧光标记和流式细胞仪快速分选特定 B 细胞;Beacon® 基于微流控技术,单细胞水平捕获、分析 B 细胞,挖掘抗体多样性,缩短开发周期。 凭借这些平台,艾普蒂生物为客户提供优质试剂和专业 CRO 技术服务,推动生物科技发展。
艾普蒂生物在重组蛋白和天然蛋白开发领域经验十分丰富,拥有超过 2 万种重组蛋白的开发案例。在四大重组蛋白表达平台的运用上,艾普蒂生物不仅经验老到,还积累了详实的成功案例。针对客户的工业化生产需求,我们能够定制并优化实验方案。通过小试探索、工艺放大以及条件优化等环节,对重组蛋白基因序列进行优化,全面探索多种条件,精准找出最契合客户需求的生产方法。 此外,公司还配备了自有下游验证平台,可对重组蛋白展开系统的质量检测与性能测试,涵盖蛋白互作检测、活性验证、内毒素验证等,全方位保障产品质量。 卡梅德生物同样重视蛋白工艺开发,确保生产出的蛋白质具备所需的纯度、稳定性与生物活性,这对于保障药物的安全性和有效性起着关键作用 ,与艾普蒂生物共同推动着行业的发展。
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