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Suplementacja kobalaminy u psów i kotów - Vetkompleksowo – serwis dla lekarzy weterynarii
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Wyszukaj w serwisie


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Suplementacja kobalaminy u psów i kotów


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Kobalamina (witamina B12) jest rozpuszczalną w wodzie, egzogenną witaminą. Po wchłonięciu w przewodzie pokarmowym jest transportowana do wszystkich komórek organizmu. Pełni w organizmie szereg bardzo istotnych funkcji: jest niezbędna do prawidłowego przebiegu procesu erytropoezy w szpiku kostnym, bierze udział w syntezie DNA i RNA w erytroblastach, uczestniczy w przemianach metabolicznych tłuszczów i węglowodanów oraz ma wpływ na prawidłowe funkcjonowanie układu nerwowego (11, 13).

Psy oraz koty nie mają możliwości syntetyzowania kobalaminy w organizmie, dlatego musi być ona dostarczana wraz z pokarmem. Znajomość metabolizmu oraz wchłaniania kobalaminy jest istotna dla lekarza weterynarii, gdyż pomaga w ustaleniu przyczyn jej niedoborów, a przez to znacząco wpływa na ustalenie prawidłowego postępowania terapeutycznego.

Witamina B12 w pokarmach pochodzenia zwierzęcego jest związana z białkiem. Transport kobalaminy oraz proces jej wchłaniania w przewodzie pokarmowym są złożone i wymagają udziału kilku białek nośnikowych oraz czynnika IF (10).

W początkowym etapie procesu przemiany kobalaminy dochodzi do jej uwolnienia w żołądku pod wpływem działania pepsyny i kwasu solnego. Pepsyna w organizmach zwierzęcych jest produkowana w formie nieaktywnej, do jej aktywacji dochodzi w wyniku działania soku żołądkowego, dlatego tak istotne znaczenie w procesie uwalniania witaminy B12 ma odpowiednie pH żołądka. Następnie kobalamina w żołądku łączy się z glikoproteiną o nazwie haptokoryna (białko R). Połączenie to chroni ją przed niekorzystnym działaniem bakterii w proksymalnym odcinku przewodu pokarmowego. Po dotarciu do dwunastnicy kompleks kobalamina – haptokoryna ulega rozkładowi pod wpływem działania proteaz [...]

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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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Poznaj nasze serwisy