細(xì)胞描述
The tissue of the central nervous system is made up of two classes of cells that may be broadly categorized as neurons and glia. Neurons are anatomic, functional, and trophic units of the brain [1]. Despite great variability in size and shape, all neurons share common morphological features, the key elements of a highly complex communication network. Neurons are dynamically polarized cells that serve as the major signaling unit of the nervous system. The brain contains about 1 x 1011 neurons, each being able to contact at least 10,000 other neurons [2].
細(xì)胞凍存步驟
待細(xì)胞生長(zhǎng)狀態(tài)良好時(shí)，可進(jìn)行細(xì)胞凍存。下面T25瓶為例； 1．細(xì)胞凍存時(shí)，棄去培養(yǎng)基后，PBS清洗瓶底1-2次后加入1ml胰酶，細(xì)胞變圓脫落后，加入2ml完全培養(yǎng)基終止消化，可使用血球計(jì)數(shù)板計(jì)數(shù)。 2．1000RPM離心5分鐘去掉上清。用血清重懸浮，加DMSO至最終濃度為10%。加入DMSO后迅速混勻，按每1ml的數(shù)量分配到凍存管中，注意凍存管做好標(biāo)識(shí)。本公司按每個(gè)凍存管細(xì)胞數(shù)目大于1X106個(gè)細(xì)胞凍存。3．將凍存管置于程序降溫盒中，放入-80度冰箱，至少2個(gè)小時(shí)以后轉(zhuǎn)入液氮灌儲(chǔ)存。記錄凍存管位置以便下次拿取。
