▁Because ▁of ▁this ▁high ▁expression , ▁PS MA ▁is ▁being ▁developed ▁as ▁potential ▁bi om ark er ▁for ▁ther apy ▁and ▁imag ing ▁of ▁some ▁can cers . ▁ ▁In ▁human ▁pro state ▁cancer , ▁the ▁higher ▁express ing ▁tum ors ▁are ▁associated ▁with ▁quick er ▁time ▁to ▁pro gression ▁and ▁a ▁greater ▁percentage ▁of ▁patients ▁suffering ▁re lapse . ▁In ▁vit ro ▁studies ▁using ▁pro state ▁and ▁breast ▁cancer ▁cell ▁lines ▁with ▁decre ased ▁PS MA ▁levels ▁showed ▁a ▁significant ▁decrease ▁in ▁the ▁pro l ifer ation , ▁migration , ▁invasion , ▁ad hes ion ▁and ▁surv ival ▁of ▁the ▁cells . ▁ ▁Im aging ▁ ▁PS MA ▁expression ▁can ▁be ▁im aged ▁with ▁a ▁gal li um - 6 8 ▁PS MA ▁scan ▁for ▁posit ron ▁emission ▁tom ography . ▁\ ▁ ▁In ▁terms ▁of ▁imag ing , ▁no ▁non - t um or ▁site ▁such ▁as ▁normal ▁kid ney , ▁small ▁int est ine , ▁or ▁C NS ▁has ▁been ▁im aged ▁using ▁second - gener ation ▁ant ib ody ▁imag ing ▁agents . ▁S ites ▁including ▁b one ▁are ▁detected ▁with ▁better ▁sens itivity ▁than ▁with ▁te ch net ium ▁sc ans . ▁T um ors ▁that ▁express ▁PS MA ▁in ▁their ▁ne ov as cul ature ▁are ▁being ▁im aged . ▁Low - m ole cular - weight ▁lig ands ▁exhib it ▁different ▁binding ▁with ▁imag ing ▁seen ▁in ▁the ▁kid ney ▁of ▁the ▁mouse , ▁however ▁m ice ▁have ▁much ▁higher ▁levels ▁of ▁PS MA ▁in ▁kid