首页 » MUTU-I BioVector®人类地方性 Epstein-Barr 病毒(EBV)阳性伯基特淋巴瘤细胞株 / MUTU-I Cell Line

MUTU-I BioVector®人类地方性 Epstein-Barr 病毒(EBV)阳性伯基特淋巴瘤细胞株 / MUTU-I Cell Line

  • 价  格:¥99860
  • 货  号:BioVector® MUTU-I
  • 产  地:北京
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BioVector® MUTU-I 源于人类地方性 Epstein-Barr 病毒(EBV)阳性伯基特淋巴瘤细胞株 / MUTU-I Cell Line

一、 背景与来源说明 / Background & Origin

MUTU-I(常写作 MUTU 1Mutu-1)是一种来源于人类地方性 Epstein-Barr 病毒(EBV)阳性伯基特淋巴瘤(Burkitt Lymphoma, BL)的 B 淋巴细胞株

MUTU-I 与姊妹株 MUTU-III 同源,分离自同一名携带 $t(8;14)$ 染色体易位的男性患者活检组织。MUTU-I 属于严格的 EBV 潜伏期 I 型(Latency Type I)表型克隆。在该状态下,病毒基因组高度甲基化,仅表达 EBNA1 蛋白及 EBERs、ebv-miR-BART 等非编码 RNA,严格沉默 EBNA2、EBNA3s 及 LMP1/LMP2 等免疫原性蛋白。MUTU-I 是研究 EBV 潜伏期 I 型维持、染色质构象调控、病毒表观遗传学机制以及与 MUTU-III(潜伏期 III 型)对比研究潜伏期类型转换的金标准细胞模型

二、 细胞生物学特征 / Biological Characteristics

  • 物种与来源 / Taxonomy & Source:人(Homo sapiens),B 淋巴细胞,伯基特淋巴瘤(Burkitt Lymphoma)

  • 生物安全等级 / Biosafety LevelBSL-2(EBV/HHV-4 阳性,需在二级生物安全柜中操作)

  • 生长特性 / Growth Properties:悬浮生长(Suspension),常呈单细胞分散或小型细胞团

  • 表型与基因特征 / Phenotypic & Genetic Markers

    • 表面标记:CD19(+)、CD20(+)、CD10(+)、CD77(+)(生发中心 B 细胞表型,缺乏 CD23/CD30/CD39 等活化标记)

    • 遗传变异:携带经典 $t(8;14)$ 易位及 MYC 基因易位重排

    • 病毒特征EBV 阳性(潜伏期 I 型:仅表达 EBNA1,沉默 EBNA2 及 LMP1)

  • 主要应用 / Key Applications:EBV 潜伏期 I 型与 III 型转换机制研究、EBNA1 驱动的质粒复制与定植调控、EBV 表观遗传学甲基化研究、淋巴瘤免疫逃逸模型

三、 培养条件与传代指南 / Culture & Handling Protocols

1. 推荐培养基 / Complete Growth Medium

  • 基础培养基:RPMI-1640

  • 添加成分:10% 至 15% 灭活胎牛血清(FBS) + 1% 双抗(Penicillin-Streptomycin,可选)

  • 培养环境:37 摄氏度,5% $CO_2$,高湿度培养箱

2. 复苏与传代操作 / Thawing & Subculture

  1. 复苏:将冻存管快速置于 37 摄氏度水浴中摇晃融化(约 1-2 分钟)。吸出细胞悬液加至含 8-10 mL 预热完整培养基的离心管中,125 x g 离心 5 分钟。弃上清,用预热培养基重悬,接种密度建议在 $0.4 - 0.6 \times 10^6\text{ cells/mL}$

  2. 传代与维持

    • 维持细胞密度在 $0.3 - 0.6 \times 10^6\text{ cells/mL}$

    • 每 2 至 3 天按 1:2 或 1:3 比例补充新培养基或分瓶传代。

    • 特殊注意:长期过度传代或高密度培养可能导致 MUTU-I 细胞自发漂移向潜伏期 III 型(高表达 LMP1/EBNA2),建议使用低代次细胞冻存保种,并定期通过 Western Blot 验证 LMP1/EBNA2 的阴性表达。

3. 冻存保存 / Cryopreservation

  • 冻存液配方:70% RPMI-1640 + 20% FBS + 10% DMSO

  • 冻存密度$3 - 5 \times 10^6\text{ cells/vial}$,采用程序降温冻存并长期保存于液氮(-196 摄氏度)。

四、 技术指标简表 / Technical Data Summary

参数 / Parameter描述 / Specification
细胞名称 / Cell NameMUTU-I (Mutu I / Mutu-1)
生物安全等级 / BSLBSL-2
组织来源 / Source人类伯基特淋巴瘤(Burkitt Lymphoma)B 细胞
病毒状态 / Viral StatusEBV 阳性(潜伏期 I 型 / Latency Type I)
生长形态 / Morphology淋巴细胞样,悬浮生长的单细胞或微小细胞团
关键标志物 / Key MarkersEBNA1(+)、EBNA2(-)、LMP1(-)、CD10(+)
主要应用 / Primary UsesEBV 潜伏期 I 型基因调控、EBNA1 功能研究、病毒表观遗传学

BioVector® MUTU-I Cell Line

1. Background and Origin

MUTU-I (also designated as MUTU 1 or Mutu-1) is a human B-cell line derived from an endemic Epstein-Barr virus (EBV)-positive Burkitt lymphoma (BL).

Isogenic to MUTU-III, MUTU-I was isolated from a biopsy of a male BL patient carrying the canonical $t(8;14)$ chromosomal translocation. MUTU-I strictly maintains the EBV Latency Type I phenotype. In this state, the viral genome is extensively methylated, selectively expressing only EBNA1 along with non-coding RNAs (EBERs and ebv-miR-BARTs), while silencing immunogenic viral proteins such as EBNA2, EBNA3s, and LMP1/LMP2. MUTU-I is the gold-standard cellular model for investigating EBV Type I latency maintenance, chromatin architecture, viral epigenetics, and latency phase transitions.

2. Biological Characteristics

  • Taxonomy & Source: Homo sapiens, B lymphocyte, Burkitt lymphoma

  • Biosafety Level: BSL-2 (EBV positive; handle in a Biosafety Level 2 cabinet)

  • Growth Properties: Suspension; grows as single cells or small loose aggregates

  • Phenotypic & Marker Features:

    • Surface Antigens: CD19(+), CD20(+), CD10(+), CD77(+) (germinal center B-cell phenotype; lacks activation markers like CD23/CD30)

    • Genetics: Translocation $t(8;14)$; MYC gene rearrangement

    • Viral Status: EBV(+) (Latency Type I: EBNA1+, EBNA2-, LMP1-)

  • Primary Applications: Mechanism of EBV Latency I/III switching, EBNA1-mediated plasmid replication, viral DNA epigenetic methylation, and lymphoma immune evasion mechanisms

3. Culture and Handling Protocols

Recommended Growth Medium

  • Base Medium: RPMI-1640

  • Supplements: 10% to 15% heat-inactivated Fetal Bovine Serum (FBS)

  • Culture Conditions: 37 degrees Celsius, 5% $CO_2$, humidified incubator

Thawing and Subculture Protocol

  1. Thawing: Rapidly thaw in a 37 degrees Celsius water bath. Transfer into 8–10 mL pre-warmed complete medium and centrifuge at 125 x g for 5 minutes. Resuspend in fresh medium and seed at $0.4 - 0.6 \times 10^6\text{ cells/mL}$.

  2. Subculturing:

    • Maintain working cell density between $0.3 - 0.6 \times 10^6\text{ cells/mL}$.

    • Split cells 1:2 or 1:3 every 2–3 days.

    • Crucial Note: Extended passaging or overgrowth can induce spontaneous drift from Latency Type I toward Type III (upregulating LMP1 and EBNA2). Maintain low-passage stocks and regularly confirm LMP1/EBNA2 negativity via Western Blot.

Cryopreservation

  • Freezing Medium: 70% RPMI-1640 + 20% FBS + 10% DMSO

  • Storage: Freeze at $3 - 5 \times 10^6\text{ cells/vial}$ using slow-freezing containers and store in liquid nitrogen (-196 degrees Celsius).

4. Technical Data Summary

ParameterSpecification
Cell NameMUTU-I (Mutu I / Mutu-1)
Biosafety LevelBSL-2
Tissue OriginHuman B-cell Burkitt Lymphoma
EBV LatencyEBV Positive (Type I Latency)
MorphologyLymphocyte-like, suspension single cells/small clumps
Key MarkersEBNA1(+), EBNA2(-), LMP1(-), CD10(+)
Primary UsesEBV Latency Type I regulation, EBNA1 function, viral epigenetics

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