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Cell culture
Cell culture: ES stem cell culture
Cell culture: Insect cell culture
Cell culture: Primary culture: Endothelial cell culture
Cell culture: Primary culture: Primary neuronal cell culture

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RNA extraction principles

Category: RNA: RNA extraction and purification

High quality RNA isolation is a critical step for any downstream application such as northern blot, nuclease protection assay, RT-PCR, in vitro transcription, cDNA library construction, to name a few. Various factors may affect the quality of RNA extracted from tissue and cell samples.1. Cell and tissue sample handling: It is important to inactivate endogenous RNases immediately after tissue or cell harvesting. Cell and tissue samples can be extracted immediately after harvesting in strong chaotropic lysis buffer. Or samples can be stored immediately in liquid nitrogen. Once freezed in liquid nitrogen, never let the sample thaw before RNA isolation. Samples can also be placed immediately into RNAlater solution available from Ambion.2. Homogenize samples thoroughly to prevent RNA degradation and increase yields.3. RNA storage conditions: RNA can be stored soluble in RNase-free water or as NH4OAc/ethanol precipitation and stored at -80c.

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CHO cell line culture

The Chinese Hamster Ovary (CHO) cell line is often used to express human recombinant glycoproteins. The CHO cell line can grow in both attached and suspension conditions. In suspension condition CHO cells grow in aggregates and thus make it easy for large-scale production of heterogenous recombinant proteins. <a href="http://www.atcc.org/common/catalog/numSearch/numResults.cfm?atccNum=CCL-61">CHO cell culture conditions from ATCC</a> <a href="http://stanxterm.aecom.yu.edu/wiki/index.php?page=Basic_CHO_cell_culture">Basic CHO cell culture</a>Improvement of CHO cell culture medium formulation: simultaneous substitution of glucose and glutamine. Altamirano C, Paredes C, Cairo JJ, Godia F. Biotechnol Prog. 2000 Jan-Feb;16(1):69-75.