American researchers claim that a previouslyidentified gene can help build new systems from mouse embryonic stem cells. Washington University researchers believe their findings can help creating new tissue for the treatment of a wide range of diseases and injuries specially for the repair of damaged hearts.

Claim/verb/:  demand; sue; plea; assert ادعا كردن‌

 
Previously/adverb/:   before, at an earlier time پيشين‌، قبلي
 
Identified/adjective/: recognized, verified as being a specific person or thing شناسايي
 
Stem/noun/: central stalk of a plant; petiole ساقه‌، تنه‌، ريشه
 
Cell/noun/:  loculus, smallest unit of life ياخته‌، سلول
 
Tissue/noun/:   aggregate of cells of a particular kind; absorbent tissue paper for use as a handkerchief بافته‌، بافت