Ka tuyige ku kigezo kya FISH (Fluorescence in Situ Hybridization) ekizuula ebyama by'obuzaale bwo!

Wali owuliddeko ku ‘FISH test’ eno (Ekigezo kya Fluorescence in Situ Hybridization Test)? Oboolyawo omusawo wo akusabye oba omuntu gw’omanyi okukola okukebera kuno. Wadde nga kiyinza okuwulikika ng’ekizibu katono, kigezo kikulu nnyo ekiyinza okuzuula ebintu bingi munda mu mibiri gyaffe. Kale leero, ka twogere ku kigezo kino ekya FISH kye ki, kye kikola, n’engeri gye kikolebwamu mu ngeri ennyangu gy’osobola okutegeera.

Ekigezo kino ekya FISH (Fluorescence in Situ Hybridization) kye ki?

Mu ngeri ennyangu, FISH kigezo kya buzaale. Abakugu mu by’endwadde, nga bano basawo abakugu mu kuzuula endwadde , bakozesa enkola eno okuzuula endwadde eziva ku nkyukakyuka mu bintu ebitonotono ebiyitibwa chromosomes mu mibiri gyaffe. Oluusi, okukebera kuno era kuyinza okuyamba okuzuula enkyukakyuka mu buzaale eziyinza okujjanjabibwa endwadde nga kookolo.

Lowooza ku kino: obuzaale bwaffe bulinga ekitabo ekiyigiriza emibiri gyaffe. Ekitabo kino eky’okulagira kitubuulira engeri buli kintu mu mibiri gyaffe gye kikola. Ensengekera zino zisangibwa mu nsengekera eziyitibwa chromosomes, eziringa emiguwa. Kale, kiki ekibaawo singa ebimu ku bigambo ebiri mu kitabo kino eky’ebiragiro, DNA yaffe (deoxyribonucleic acid) , bisazibwamu, oba singa wabaawo ebigambo bingi nnyo, oba singa ebigambo ebimu bikyusibwa? Obutoffaali bwaffe bufuna ebiragiro ebikyamu. Mu ngeri eno, amawulire gasobola okubula (okusazaamu), okukoppololwa okusinga bwe kyetaagisa (okugaziya), oba okusengulwa (okukyusa). Enkyukakyuka zino zisobola okukyusa engeri emibiri gyaffe gye gikola ne tuleeta endwadde nga kookolo.

Kale, ekigezo kino ekya FISH kye kikola kiri nti, kiringa okukozesa ekkalaamu eza langi "okusiiga langi" ku bitundu ebitongole ebya chromosomes oba genes. Olwo, abasawo abo abakugu basobola bulungi okuzuula ebitundu bye beetaaga okuzuula endwadde nga babitunuulira mu microscope. Langi eno bw’ogitunuulira ng’okozesa microscope, eringa amataala aga langi.

Kiki ekiyinza okuzuulibwa mu kukebera kwa FISH?

Awo oyinza okuba nga weebuuza, kiki ddala ekiyinza okusangibwa n’okugezesebwa kuno okwa FISH? Ebikulu bye bino:

• Zuula enkyukakyuka ennene mu buzaale mu kookolo. Nga bakozesa amawulire gano, abasawo basobola okuzuula obulungi ekika kya kookolo ne balondawo obujjanjabi obusinga obulungi.
• Kebera oba waliwo obuzibu bwonna mu nsengekera y’obutonde (chromosomal abnormalities) nga omwana tannazaalibwa (nga tannazaalibwa) oba ng’amaze okuzaalibwa. Kino kiyamba okuzuula embeera z’obuzaale ezimu nga bukyali.
• Okuzaala mu kisenge (IVF) kizingiramu okugezesa embuto okulaba oba temuli buzibu mu nsengekera y’obutonde (chromosomal abnormalities) nga tennasimbibwa mu nnabaana wa maama (preimplantation genetic testing).

Okugezesebwa kuno okwa FISH kukola kutya?

Okay, kati ka tulabe akaama akatono ku ngeri ekigezo kino ekya FISH gye kikola.

Nze nnagambye emabegako nti DNA yaffe eringa ekitabo ekinene eky’ebiragiro. Kale okugezesebwa kuno okwa FISH kulinga okulaga ebitundu ebisinga obukulu mu kitabo ekyo eky’ebiragiro ne langi ey’enjawulo eya fluorescent. Bannasayansi bakola "langi eno eya langi," oba "probe," nga bassaako ebiwandiiko ebitangaaza ku DNA yennyini.

DNA yaffe ekolebwa emiguwa ebiri egikwatagana, ng’amannyo ga zipu. Bannasayansi kye bakola, basooka kwawula emiguwa gino ebbiri nga bakozesa ekyuma ekikebera kye bakoze, ne DNA eri mu sampuli gye baagala okugezesa. Bakola okunoonyereza kuno okukwatagana n’omutendera gwa DNA gwe banoonya, kwe kugamba, sentensi entuufu gye banoonya mu kitabo ky’ebiragiro.

Olwo, batabula ebikebera bino ebitegekeddwa ne sampuli ya DNA eggiddwa mu bitundu by’omubiri oba amazzi (kino kiyitibwa ekigendererwa). Olwo, singa probe eyo egenda n’esanga ekitundu kya DNA ekirimu ekigambo ky’enoonya, ejja kunywerera ku kyo (hybridize). Olw’ebiwandiiko ebyo ebimasamasa, ekitundu ekyo ekya DNA kijja kwakaayakana mu langi ennungi. Omusawo w’endwadde bw’akitunuulira n’ekintu ekirabika obulungi eky’enjawulo, ebifo bino ebimasamasa bijja kulabika bulungi. Olwo asobola okutegeera oba amawulire agakwatagana galiwo n’obungi bwago bwe buliwo. Tekyewuunyisa?

Enkyukakyuka mu buzaale eziyinza okuzuulibwa nga zikeberebwa FISH

Abakugu mu by’endwadde basobola okukozesa okukebera kuno okwa FISH okukebera obutoffaali okulaba oba temuli nkyukakyuka mu buzaale ezimanyiddwa okuleeta endwadde nga kookolo. Oluusi kiyinza okuyamba okukakasa oba okunnyonnyola ebiva mu kukebera karyotyping, nga kino kwe kukebera chromosomes . Bino bye bimu ku nkyukakyuka entongole okukebera FISH z’esobola okusanga:

• Amplification: Kino we wabaawo kkopi z’obuzaale nnyingi okusinga bwe kisuubirwa. Kiba ng’okukola photocopy gy’oyagala okukola photocopy. Bannasayansi basobola okukozesa FISH okulaba kkopi mmeka ez’obuzaale obusinga ku bwe kisuubirwa.
• Translocations/rearrangements: Kino kye kiseera ekitundu ky’obuzaale oba chromosome bwe kitwalibwa mu kifo eky’enjawulo okusinga bwe kirina okuba. Bannasayansi basobola okukozesa ebyuma ebikebera langi bibiri okuzuula kino. Mu ggiini eya bulijjo, langi ebbiri eza probes zino zirina okulabika nga ziri kumpi. Naye singa ekifo kiba kikyuse, langi zombi zijja kulabika nga zaawukana wala.
• Okusazaamu: Okufaananako n’okukyusakyusa (translocations), bannassaayansi bakozesa ebikebera ebisukka mu kimu okuzuula ebifo amawulire we gabula mu DNA. Probes ezimu zijja kwesiba ku DNA eri mu sampuli, naye endala tezijja kunywerera we zirina. Wano we bamanya nti amawulire agamu gabuze (gasaziddwamu) mu kifo ekyo.

Endwadde ezisobola okuzuulibwa nga bakeberebwa FISH

Abasawo basobola okukozesa okukebera kwa FISH okuzuula enkyukakyuka mu buzaale eziyinza okuyamba okuzuula embeera nga:

• Obulwadde bwa lymphoma
• Acute myeloid leukemia, chronic myeloid leukemia, n’ebika bya leukemia ebirala
• Obulwadde bwa myeloma obuyitibwa multiple myeloma
• Kookolo w’ekibumba
• Glioma (ekika kya kookolo w’obwongo) .
• Mesothelioma (kookolo w’amawuggwe) .
• HER2 amplification (kino kisinga kulabibwa mu kookolo w’amabeere, naye era kiyinza okulabibwa mu kookolo w’olubuto n’amawuggwe)
• MET amplification (kino kisinga kulabibwa mu kookolo w’amawuggwe, mu lubuto, n’omumwa gwa nnabaana) .
• Okugaziya MYCN (mu kika kya kookolo ayitibwa Neuroblastoma) .
• Mu kookolo w’amawuggwe ow’obutoffaali obutali butono , okuddamu okutegeka/okuyungibwa kw’obuzaale ALK, RET, ne ROS1 kubaawo. Obuzaale buno ALK, RET oba ROS1 busobola okwegatta n’obuzaale obulala ne buleeta kookolo.

Nneetegekera ntya okugezesebwa kwa FISH?

Engeri gy’oteekateeka okukeberebwa FISH esinziira ku kika kya sampuli omusawo gy’akuggyako.

• Ku kukebera nga tonnazaala: Omusawo wo ajja kukola okukebera okw’enjawulo okuyitibwa amniocentesis .
• Ku kukebera obuzaale nga tebannaba kuteekebwamu (PGD oba PGS): Akatundu akatono ak’obutoffaali okuva mu nkwaso eziwerako katwalibwa okukeberebwa. Kino kitera okukolebwa nga wayise ennaku ntono ng’ovuddemu eggi.
• Singa omusawo wo ateebereza nti ggwe oba omwana wo olina obulwadde obuva ku butabeera bulungi mu nsengekera y’obutonde oba enkyukakyuka mu buzaale: Kino kiyinza okukeberebwa n’okukebera omusaayi okwangu .
• Okuzuula kookolo oba enkyukakyuka mu buzaale mu butoffaali bwa kookolo (okukebera molekyu): Ojja kwetaaga okukeberebwa (tumor or bone marrow biopsy) , nga kino kye sampuli y’ebitundu oba obusigo bw’amagumba.
• Okuzuula oba okulondoola kookolo w’ekibumba: Oluusi okukeberebwa kwa FISH kukolebwa ku sampuli y’omusulo .

Ku bigezo bino, okukebera omubiri gwokka kwe kutera okwetaagisa okutegekebwa mu ngeri ey’enjawulo. Okuva bwe kiri nti ebitundu ebisinga bikolebwa nga bakozesa eddagala erisumulula, olina okugoberera ebiragiro by’omusawo ku ngeri y’okuteekateekamu.

Abakugu mu by’endwadde bakola batya okukebera kuno okwa FISH?

Ku kukebera FISH, omusawo w’endwadde oba omukugu mu laboratory agoberera emitendera gino:

1. Okukola probe(s): Mu kino, balondawo ebitundu bya DNA ebikwatagana n’omutendera gwa DNA gwe banoonya. Oluvannyuma, basala obutonotono mu DNA eyo ne bongerako ebiwandiiko ebitangaaza.

2. Denaturation of the probe and target: Kino kitegeeza okwawukana kw’enkolagana ez’emirundi ebiri wakati wa probe ne DNA sample ekeberebwa.

3. Okugatta: Probes bwe zitabulwa ne sampuli ya DNA eggiddwa mu bitundu by’omubiri oba amazzi, probes zeekwata ku nsengekera za DNA ze zinoonya.

4. 4. .Okukebera ebivuddemu: Bakozesa microscope ey’enjawulo eya fluorescent microscope okulaba ebiwandiiko we bitangalijja mu sampuli.

Olwo omusawo w'endwadde ajja kuloopa ebivuddemu bino eri omusawo wo .

Biki ebiva mu kukebera FISH?

Ekika ky’ebivudde mu kukeberebwa kwa FISH kisinziira ku kika ky’okukebera kw’olina. Okukebera FISH nga kirungi kitegeeza nti waliwo obuzibu mu chromosomal oba genetic abnormality mu butoffaali mu sample. Kirungi okwogera n’omusawo wo ku ngeri ebinaavaamu gye binaafaanana ne kye bitegeeza.

Kiki ekibaawo singa okukeberebwa kwa FISH kuzuulibwa nga kirungi?

Singa okukeberebwa kwo okwa FISH kulaga nti kirungi, omusawo wo ajja kukunnyonnyola kye kitegeeza ne by’oyinza okukola. Singa okukebera kuno kwakolebwa okuzuula enkyukakyuka mu buzaale mu kookolo, wayinza okubaawo obujjanjabi obugendereddwamu obugenderera enkyukakyuka eyo entongole. Kale kikulu okwogera n’omusawo wo nga tosattira.

Kitwala bbanga ki okufuna ebyava mu kukeberebwa kwa FISH?

Kiyinza okutwala wonna okuva ku wiiki emu okutuuka ku nnya okufuna ebyava mu kukeberebwa kwa FISH. Omusawo ajja kukubuulira ddi lw’olina okusuubira ebivaamu n’engeri y’okukizuulamu .

Ddi lwe nnina okutuukirira omusawo wange?

Bw’oba ​​olina ekibuuzo kyonna ku kukeberebwa oba ebyavaamu, tolwawo kwogera na musawo wo. Bajja kukunnyonnyola buli kimu.

N’ekisembayo, obubaka obusinga obukulu

Okulinda ebyava mu kukeberebwa obuzaale kiyinza okukutiisa, okweraliikirira, era oluusi n’okukuzitoowererako katono. Oyinza okuba ng’olinze kuddibwamu. Ekigezo kino ekya FISH tekinologiya akuyamba okuzuula eby'okuddamu ebyo, nga "highlighter" ezuula n'okussaako langi amawulire ge weetaaga .

Eby’okuddamu by’ofuna biyinza obutaba nga bye wali osuubira, naye bijja kukuyamba okutegeera embeera gy’olimu n’ebyo by’oyinza okukola. Okuva awo, ggwe n’omusawo wo musobola okukolera awamu okukola enteekateeka esinga obulungi ey’okugenda mu maaso.

Jjukira nti kikulu nnyo okusaba omusawo akunnyonnyola ku kintu kyonna ky’olowooza ku kukebera kuno, lwaki kukolebwa, n’ebyavaamu bye bitegeeza.

` Okukebera FISH, okukebera obuzaale, chromosomes, DNA, kookolo, enkyukakyuka mu buzaale, okukebera nga tonnazaala