** ASX-listed shares of Mesoblast MSB.AX jump as much as 8.8% to A$1.800; marks biggest intraday pct gain since June 4

** MSB hits highest since June 19

** Stock biggest gainer on S&P/ASX 200 index .AXJO; set for sixth straight session of gains

** Cell-therapy tech firm and U.S. FDA align on key items for Biologics License Application for its therapy product, Revascor

** Revascor is being developed to treat advanced, end-stage chronic heart failure

** Co intends to apply for accelerated FDA approval by 2025-end

** MSB last up 7.3%, trimming YTD losses to 45%

(Reporting by Shruti Agarwal in Bengaluru)

((Shruti.Agarwal@thomsonreuters.com))