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HT22
Tissue
大腦、海馬體
Synonyms
HT-22

Documents

HT22

Cell line · Product number 305158

The HT22 cell line, an immortalized subclone derived from HT4 cells of the mouse hippocampus, is pivotal in neuropharmacological research. Originating thr...

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01General information

Description

HT22 細胞系是源自小鼠海馬迴 HT4 細胞的不朽化亞克隆,在神經藥理學研究中扮演關鍵角色。該細胞系源自利用溫度敏感型 SV40 T 抗原對小鼠神經組織進行不朽化處理, HT22 細胞提供了一個獨特的體外模型,用於探究谷氨酸誘導細胞毒性的作用機制,而此機制在阿茲海默症、亨廷頓氏症及帕金森氏症等神經退化性疾病中扮演著重要角色。

HT22 細胞呈現神經元表型,且對谷氨酸極為敏感;谷氨酸是一種重要的興奮性神經傳導物質,參與認知、學習和記憶等關鍵大腦功能。 然而,過量的谷氨酸攝取可能導致谷氨酸毒性及神經細胞過度興奮,並透過涉及氧化壓力與細胞凋亡的機制,造成細胞損傷或死亡。

HT22 小鼠海馬迴細胞被應用於神經毒性研究(例如探討異氟烷暴露的影響)、探索染色質景觀與表觀遺傳特徵,以及研究血清素能輸入對海馬迴神經發生之影響。 後者包括對血清素再攝取抑制劑及其在抗憂鬱藥篩選中的作用進行研究,以及血清素轉運體(SERT)糖基化對神經元功能的影響。

HT22 細胞系對谷氨酸的反應特徵已充分闡明,且在研究血清素能系統方面具有實用價值,因此持續成為推動神經藥理學發展及研發各類神經系統疾病治療方法的寶貴工具。

Tissue
大腦、海馬體
Synonyms
  • HT-22

02Classification

Organism
Mouse
Growth properties
Adherent
GMO status
GMO-S1
GMO status details
GMO-S1: This murine hippocampal neuronal cell line (HT22) contains a retroviral construct encoding temperature-sensitive SV40 T-Antigen, supporting conditional immortalization. The insert is stably present in neuronal precursor cells. This classification applies only within Germany and may differ elsewhere.
Biosafety level
1

03Characteristics

Morphology
上皮性

04Identifiers

Citation
HT22(Cytion 型號 305158)
NCBI TaxID
10090
Cellosaurus
CVCL_0321

05Handling and culture

Culture medium
DMEM,含 4.5 g/L 葡萄糖、4 mM L-谷氨醯胺、3.7 g/L NaHCO₃ 及 1.0 mM 丙酮酸鈉(Cytion 產品編號 820300a)
Incubation atmosphere

37°C,5% CO₂,加濕環境。

Supplements
在培養基中加入 10% 的胎牛血清(FBS)
Dissociation reagent
Accutase
Subculturing
從貼壁細胞中移除舊培養基,並用不含鈣和鎂的PBS洗滌細胞。T25培養瓶使用3-5毫升PBS,T75培養瓶則使用5-10毫升。 接著,用 Accutase 完全覆蓋細胞,T25 培養瓶使用 1–2 毫升,T75 培養瓶則使用 2.5 毫升。將細胞於室溫下孵育 8–10 分鐘,使其脫附。 孵育後,將細胞與 10 毫升培養基輕柔混合以使其重新懸浮,然後以 300xg 離心 3 分鐘。棄去上清液,將細胞重新懸浮於新鮮培養基中,並轉移至已預先加入新鮮培養基的新培養瓶中。
Thawing and culturing
  1. Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit.

  2. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required.

  3. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains.

  4. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening.

  5. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently.

  6. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium.

  7. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks; for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth.

  8. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes.

06Quality control and cryopreservation

Sterility

透過基於 PCR 的檢測及基於發光原理的支原體檢測方法,排除支原體污染的可能性。

為確保無細菌、真菌或酵母菌污染,每日均會對細胞培養物進行目視檢查。

Freeze medium
作為冷凍保存培養基,我們使用 50% 基礎培養基 + 40% 胎牛血清 (FBS) + 10% 二甲基亞砜 (DMSO),或 CM-1(Cytion 型號 800100),該培養基含有經優化的滲透保護劑和代謝穩定劑,可提高細胞存活率並減輕冷凍引起的應激。
Storage conditions

若需長期保存,請將試管置於溫度約為 −150 至 −196 °C 的氣相液氮中。僅在轉移至液氮之前,可將試管暫時存放於 −80 °C 環境中,作為短期過渡步驟。

Shipping conditions

冷凍保存的細胞系會以乾冰冷藏,並裝於經驗證的隔熱包裝中,包裝內含有足夠的冷媒,以確保在運輸過程中溫度維持在約 −78 °C。收到貨物後,請立即檢查容器,並盡快將試管轉移至適當的儲存場所。