Ive seen alot of talk about FN coming out with the the FN ARM?  I did a google search and couldnt find anything on it.  What is the FN ARM?

btt

This FN ARMS?

Hum Gene Ther. 1999 Nov 20;10(17):2859-68. Related Articles, Links
   
Increased gene transfer into human cord blood cells by centrifugation-enhanced transduction in fibronectin fragment-coated tubes.

   Sanyal A, Schuening FG.

   Bone Marrow Transplant Division, University of Wisconsin, Madison 53792, USA.

   We investigated whether transduction of human cord blood progenitor cells can be increased by spinoculation in fibronectin fragment CH-296 (FN)-coated tubes. Bicistronic vectors PA317/LgEIN, containing the enhanced green fluorescent protein (EGFP) and neomycin phosphotransferase (neo) genes, and PG13/LgDIN, containing the dihydrofolate reductase and neo genes, were used to transduce CD34-enriched human cord blood cells. Transduction by spinoculation in FN-coated tubes (spin/FN+) was compared with spinoculation in noncoated tubes (spin/FN-) and transduction in plates coated with FN (plate/FN+). Antibody to TGF-beta was added to spin/FN+ to evaluate its impact on transduction. Using producer cell line PA317/LgEIN for transduction of CD34+ cord blood cells, FACS analysis for expression of EGFP revealed mean transduction of 30.6+/-4.3, 9.1+/-1.6, and 21.1+/-6.5% of CD34+ cells in the spin/FN+, spin/FN-, and plate/FN+ arms, respectively. Transduction of CD+CD38low cells was also higher in the spin/FN+ arm as compared with transduction in the spin/FN- arm. These results were corroborated by colony-forming assays. Antibody to TGF-beta did not further increase transduction. Using a different producer cell line, PG13/pLgDIN, a higher number of G418-resistant CFU-GM was observed in the spin/FN+ as compared with the plate/FN+ and spin/FN-arms. NOD/SCID mice were transplanted with transduced, CD34-enriched human cord blood cells, and persistence of transduced human cells was analyzed in the mice marrows after 6-8 weeks: 32.8, 6.0, and 23.9% human G418-resistant CFU-GM colonies were observed in the spin/FN+, spin/FN-, and plate/FN+ arms, respectively. These results suggest that spinoculation in FN-coated tubes increases transduction of early human cord blood progenitor cells as compared with spinoculation in noncoated tubes.

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