217954
The second type are larger ( > 0.7 μm ) , contain both actin and microtubule s and can carry components of the cytoplasm between cells , such as vesicles and organelle s. These structures may be involved in cell-to-cell communication , transfer of nucleic acids between cells in a tissue , and the spread of pathogens or toxins such as HIV and prion s. Membrane nanotubes were first described in a 1999 Cell article examining the development of Drosophila melanogaster wing imaginal disc s. More recently , a Science article published in 2004 described structures that connected various types of immune cell together , as well as connections between cells in tissue culture .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None