Abstract
The ability to introduce DNA elements into host cells and analyze the effects has revolutionized modern biology. Here we describe a protocol to generate Moloney murine leukemia virus (MMLV)-based, replication-incompetent pseudotyped retrovirus capable of infecting axolotls and incorporating genetic information into their genome. When pseudotyped with vesicular stomatitis virus (VSV)-G glycoprotein, the retroviruses can infect a broad range of proliferative axolotl cell types. However, if the retrovirus is pseudotyped with an avian sarcoma leukosis virus (ASLV)-A envelope protein, only axolotl cells experimentally manipulated to express the cognate tumor virus A (TVA) receptor can be targeted by infections. These strategies enable robust transgene expression over many cell divisions, cell lineage tracing, and cell subtype targeting for gene expression.
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