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To: Ba'c T.m. Tie^'n ve^` Leukemia va` Ca dao?
>
>Tran Minh Tien
>
>PS: A` ba'c Die^~m Quy`nh co' the^? gia?ng cho to^i ve^` Leukemia, ve^`
>nguye^n nha^n ga^y be^.nh cu?a no' ddu+o+.c kho^ng ? To^i nghe no'i
>1 trong nhu+~ng nguye^n nha^n cu?a no' la` nhie^~m pho'ng xa., hoa(.c
>do di truye^`n cu?a bo^' me. bi. nhie^~m pho'ng xa., co' pha?i kho^ng ?
>Bu` la.i to^i se~ ti`m hie^?u cho ba'c ve^` "do^'t ddda(.c ca'n mai".
OK ?
Cha`o ba'c Tie^'n:
To^i xin nga('n go.n tho^i nhe'!
Leukemia la` da.ng cancer ma'u tra('ng. Ma'u tra('ng la` nhu*~ng loa.i
te^' ba`o kha'c te^' ba`o ma'u ddo?(ma`u ddo?) co' trong ma'u cu?a
ddo^ng va^.t(ca? ng` nu*~a nhe').
Trong te^' ba`o co' ha.ch te^' ba`o, trong ha.ch te^' ba`o co' gene (di
truye^`n) trong gene di truye^`n co' oncogene(gene cancer). Nhu* va^.y,
ta^'t ca? mo.i te^' ba`o dde^`u co' gene cancer ca? (so*. kho^ng?).
Bi`nh thu*o*`ng thi` nhu*~ng oncogene na`y kho^ng hoa.t ddo^ng (nhu*
nu'i lu*~a ngu? va^.y). Hoa(.c trong ngu*o*`i bi`nh thu*o*`ng he^.
tho^'ng mie^~n nhie^~m(immun system) se~ la`m nhie^.m vu. thanh toa'n
ca'c te^' ba`o "pha?n ddo^.ng"(cancer cell) ne^'u co' . Khi immunsystem
vi` ly' do gi` ddo' bi. ye^'u hoa(.c ma^'t (SIDA, .....) thi` vi` xa'c
xua^'t trong ha`ng ty? te^' ba`o trong co* the^? ne^'u co' te^' ba`o
cancer no' se~ tie^'n trie^?n tha`nh cancer .
Nhu*~ng te^' ba`o de^~ tha`nh cancer la` nhu*~ng te^' ba`o sinh sa?n
nhanh va` nhie^`u the^' he^. trong cuo^.c so^'ng cu?a 1 ddo*`i sinh
va^.t! Te^' ba`o ma'u tra('ng la` mo^.t loa.i te^' ba`o sinh sa?n nhanh
do ddo' loa.i te^' ba`o na`y de^~ bi. bie^'n ddo^?i va`tha`nh te^' ba`o
cancer .(Xa'c sua^'t ve^` nha^`m la^~n khi sao che'p gene dde^? 1 te^'
ba`o sinh sa?n tha`nh hai te^' ba`o mo*'i)
Nguye^n nha^n: ba^'t cu*' ye^'u to^' na`o la`m thay ddo^?i su*. u*'c
che^' (repression) gene cancer (oncogene) dde^`u ddu*a dde^'n ke^'t qua?
la` te^' ba`o na`y tro*? tha`nh te^' ba`o cancer . Nhu*~ng ye^'u to^':
hoa' cha^'t la`m thay ddo^?i he^. tho^'ng repression.
Thu*o*`ng nhu*~ng hoa' cha^'t ho. dde^`u co' vie^'t tre^n
nha~n(label) cu?a ho^.p ho'a cha^'t(carcinogen
material.....)
Va^.t ly':(pho'ng xa., ga^`n dda^y co' ngu*o8`i cho ra(`ng
tu*` tru*o*`ng (magnetic field)nu*~a, nhu*ng chu*a ro~)
Sinh va^.t: virus (ca'c loa.i Retrovirus.....cu`ng ho.
vo*'i virus SIDA)etc....
Ca'c ye^'u to^' na`y dde^`u quan he^. tru*.c tie^'p dde^'n kha? na(ng
u*'c che^'(repress) oncogene hoa.t ddo^.ng. Mo^.t khi te^' ba`o kho^ng
kie^?m soa't ddu*o*.c su*. hoa.t do^.ng cu?a oncogene thi` te^' ba`o
na`y bi. cancer hoa' va` sinh sa?n kho^ng ngu*`ng. DDa(.c ddie^?m cu?a
te^' ba`o Cancer la` tie^'t ra mo^.t so^' hoa' cha^'t co' the^? la`m
nhu*~ng te^' ba`o bi`nh thu*o*`ng kha'c tro*? tha`nh te^' ba`o cancer
(metatasis). Nhu*~ng te^' ba`o cancer na`y ne^'u thoa't kho?i su*. tie^u
die^.t cu?a immun-systen thi` be^.nh se~ pha't trie^?n nhanh cho'ng .
Khi ddu*'a tre? thu*`a hu*o*?ng di truye^`n oncogene de^~ bi. hoa.t
hoa' (activate) na`y tu*` bo^' va` me. hoa(.c bo^' hoa(.c me. vi`
nhu*~ng nguye^n nha^n ne^u tre^n ddu*'a tre? ra^'t de^? bi. cancer va`
mo^.t trong nhu*~ng da.ng de^~ bi. nha^'t la` Leukemia.
Tuy nhie^n mo^.t ng` co' gene bi`nh thu*o*`ng nhu*ng bi. a?nh hu*o*?ng
"na(.ng" cu?a mo^.t hoa(.c hai hoa(.c ca? ba nguye^n nha^m: hoa' cha^'t,
va^.t ly', sinh va^.t la`m cho repression system cu?a oncogene ma^'t
control thi` ng` ddo' cu~ng co' the^? pha't be^.nh cancer .
Do nhu*~ng ly' do tre^n khi co' mo^.t be^.nh ta pha?i truy ta^`m
nguye^n nha^n thi` mo*'i ro~ nguye^n nha^n ga^y be^.nh du*o*.c.
Tre^n dda^y la` va`i y' kie^'n, hie^?u bie^'t tho^ so* ki'nh mong ca'c
vi. chuye^n mo^n trong nga`nh chi"? gi'ao the^m .
Ki'nh
DQ
PS: Ba^y gio*` ba'c Tie^'n gia?ng Vie^.t va(n cho to^i ddi . Ca'm o*n
tru*o*'c .
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