3 - 84 Risk of Simulated Microgravity on Testicular Injury Induced by High-LET Carbon-ion
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I M P & HI RFL An n u a l Re p o r t
2 0 l 3
f l ow c yt o me t r y .Exp r e s s i o n o f M SH2 ge ne s i n t he i r r a d i a t e d c e l l s wa s de t e c t e d by we s t e r n bl o t a n d RT— PCR a s s a y .The v i a b i l i t y o f He PG2 c e l l s d e c r e a s e d gr a du a l l y wi t h i n c r e a s i n g t he do s a ge of c a r b o n i o n b e a m ( P< 0 . 05 v s c o nt r o 1 ) .Ca r b on i on i r r a d i a t i o n e f f i c i e n t l y i nd uc e d c e l l a p o pt o s i s a nd s i g ni f i c a nt l y up — r e gu l a — t e d t he e xp r e s s i o n o f M SH2 ge ne a t 4 . 0 Gy 6 h a f t e r i r r a d i a t i on .Hi gh — LET he a v y i o n b e a m c oul d i n du c e c e l l a p op t o s i s e f f e c t i v e l y a t c e r t a i n d o s a ge .The a p op t o s i s r a t e wa s c o r r e l a t e d wi t h t h e e x pr e s s i on o f M SH 2 .
Re f e r e nc e s
[ 1 ]R . B e n d a r d a f ,H. L a ml u m, R . R i s t a m/ i k i , e t a 1 . , Tu no r u t B i o 1 . , 4 , 2 8 ( 2 0 0 7 ) 2 1 2 . [ 2 3 J . B a r we l l , L . P a n g o n ,S . Ho d g s o n ,e t a 1 . , J . Me d . Ge n e t . 8 . ,4 4 ( 2 0 0 7 ) 5 1 6 . [ 3 ]F . B e r t o l i n i , C . B e n g a l a , L . L o s i , e t a 1 . , J . I n t . R a d i a t . O n c o 1 . B i o 1 . P h y s . , 5 , 6 8 ( 2 0 0 7 ) 1 4 5 5
Li u Ya n g,M a o Ai ho n g,Xi e Yi a n d Zha n g Hon g
Mi c r o gr a v i t y a nd s p a c e r a d i a t i on a r e p r i nc i p a l c o n c e r n s f or ma nn e d s p a c e f l i gh t,a nd s e r ve a s p o t e n t i a l — l y l i mi t i ng f a c t or s f o r i n t e r p l a ne t a r y mi s s i o ns L .Thi s s t ud y i n v e s t i g a t e d t he i mp a c t o f s i m ul a t e d mi c r o—
mi n e d a l t e r a t i on s i n s p e r ma t o ge n i c f un c t i on a nd e x pr e s s i on l e v e l s o f a p op t o t i c f a c t o r s i n mi c e f o l l owi ng e x — po s u r e t o a c ut e i r r a d i a t i on a f t e r 7 d o f s i mu l a t e d mi c r o gr a v i t y.Th e r e s ul t s de mo ns t r a t e d t h a t s i gn i f i c a nt r e d uc t i o ns i n s p e r ma t o z o a,p r i ma r y s p e r ma t oc y t e s a n d s pe r ma t o g on i a,a nd i nc r e a s e d gl o bu l a r c e l l s i n s e m- i ni f e r o us t u bu l e a nd p r o - a p op t o t i c p r o t e i n s we r e o bs e r v e d i n t he gr o up e xp o s e d t o o v e r 0 . 4 Gy i r r a d i a t i o n. Co l l e c t i v e l y,t he d a t a s ug ge s t t h a t l e s i o ns i nf l i c t e d by s i mul a t e d mi c r o gr a v i t y we r e n ot ma r ke d l y mo di f i e d
g r a v i t y o n a c u t e i n j u r y i n d u c e d b y l o w d o s e s o f c a r b o n i oBaidu Nhomakorabean s i n ma l e r e p r o d u c t i v e o r g a n s o f mi c e .a n d d e t e r —
3 —8 4 Ri s k o f Si mu l a t e d Mi c r o g r a v i t y o n Te s t i c u l a r I n j ur y I n du c e d b y Hi g h — - LET Ca r b o n - - i o n Be a ms i n M i c e
I M P & HI RFL An n u a l Re p o r t
2 0 l 3
f l ow c yt o me t r y .Exp r e s s i o n o f M SH2 ge ne s i n t he i r r a d i a t e d c e l l s wa s de t e c t e d by we s t e r n bl o t a n d RT— PCR a s s a y .The v i a b i l i t y o f He PG2 c e l l s d e c r e a s e d gr a du a l l y wi t h i n c r e a s i n g t he do s a ge of c a r b o n i o n b e a m ( P< 0 . 05 v s c o nt r o 1 ) .Ca r b on i on i r r a d i a t i o n e f f i c i e n t l y i nd uc e d c e l l a p o pt o s i s a nd s i g ni f i c a nt l y up — r e gu l a — t e d t he e xp r e s s i o n o f M SH2 ge ne a t 4 . 0 Gy 6 h a f t e r i r r a d i a t i on .Hi gh — LET he a v y i o n b e a m c oul d i n du c e c e l l a p op t o s i s e f f e c t i v e l y a t c e r t a i n d o s a ge .The a p op t o s i s r a t e wa s c o r r e l a t e d wi t h t h e e x pr e s s i on o f M SH 2 .
Re f e r e nc e s
[ 1 ]R . B e n d a r d a f ,H. L a ml u m, R . R i s t a m/ i k i , e t a 1 . , Tu no r u t B i o 1 . , 4 , 2 8 ( 2 0 0 7 ) 2 1 2 . [ 2 3 J . B a r we l l , L . P a n g o n ,S . Ho d g s o n ,e t a 1 . , J . Me d . Ge n e t . 8 . ,4 4 ( 2 0 0 7 ) 5 1 6 . [ 3 ]F . B e r t o l i n i , C . B e n g a l a , L . L o s i , e t a 1 . , J . I n t . R a d i a t . O n c o 1 . B i o 1 . P h y s . , 5 , 6 8 ( 2 0 0 7 ) 1 4 5 5
Li u Ya n g,M a o Ai ho n g,Xi e Yi a n d Zha n g Hon g
Mi c r o gr a v i t y a nd s p a c e r a d i a t i on a r e p r i nc i p a l c o n c e r n s f or ma nn e d s p a c e f l i gh t,a nd s e r ve a s p o t e n t i a l — l y l i mi t i ng f a c t or s f o r i n t e r p l a ne t a r y mi s s i o ns L .Thi s s t ud y i n v e s t i g a t e d t he i mp a c t o f s i m ul a t e d mi c r o—
mi n e d a l t e r a t i on s i n s p e r ma t o ge n i c f un c t i on a nd e x pr e s s i on l e v e l s o f a p op t o t i c f a c t o r s i n mi c e f o l l owi ng e x — po s u r e t o a c ut e i r r a d i a t i on a f t e r 7 d o f s i mu l a t e d mi c r o gr a v i t y.Th e r e s ul t s de mo ns t r a t e d t h a t s i gn i f i c a nt r e d uc t i o ns i n s p e r ma t o z o a,p r i ma r y s p e r ma t oc y t e s a n d s pe r ma t o g on i a,a nd i nc r e a s e d gl o bu l a r c e l l s i n s e m- i ni f e r o us t u bu l e a nd p r o - a p op t o t i c p r o t e i n s we r e o bs e r v e d i n t he gr o up e xp o s e d t o o v e r 0 . 4 Gy i r r a d i a t i o n. Co l l e c t i v e l y,t he d a t a s ug ge s t t h a t l e s i o ns i nf l i c t e d by s i mul a t e d mi c r o gr a v i t y we r e n ot ma r ke d l y mo di f i e d
g r a v i t y o n a c u t e i n j u r y i n d u c e d b y l o w d o s e s o f c a r b o n i oBaidu Nhomakorabean s i n ma l e r e p r o d u c t i v e o r g a n s o f mi c e .a n d d e t e r —
3 —8 4 Ri s k o f Si mu l a t e d Mi c r o g r a v i t y o n Te s t i c u l a r I n j ur y I n du c e d b y Hi g h — - LET Ca r b o n - - i o n Be a ms i n M i c e