Vitamin B7 (biotin)
Kod:12011|CPT:84591|LOINC:1980-2
| Kabi | Vitamin B7 |
|---|
Tahlil ma'lumotlari
Tadqiqot usuli
- Suyuq xromatografiya va tandem mass-spektrometriya (LC-MS/MS)
Kutilayotgan natija topshirish vaqti
1–2 kun
Maxsus tayyorlik
- Avoid smoking for at least 30 minutes before the blood draw.
Qanday foydalanish
Vitamin B7 (biotin, vitamin H) testi biotin holatini baholash va yetishmovchilikni aniqlash uchun qo‘llanadi. U quyidagi xavf omillariga ega shaxslarga mos: yetarli bo‘lmagan ratsion, malabsorbsiya sindromlari, homiladorlik, antikonvulsant terapiya, shuningdek antibiotiklarning uzoq muddatli yoki takroriy qo‘llanishi. Ushbu o‘lchov biotin metabolizmining irsiy buzilishlarini, jumladan biotinidaza yetishmovchiligi va ko‘p karboksilaza yetishmovchiligini aniqlash bo‘yicha diagnostik izlanishga ham yordam beradi.
Cheklovlar
Biotin (vitamin B7; vitamin H; koenzim R) B‑kompleksning suvda eruvchan a’zosidir. Suvda eruvchan vitaminlar sezilarli miqdorda zahiralanmaydi va ortiqcha qismi siydik bilan chiqariladi; shu bois ularning doimiy ravishda ratsion orqali ta’minlanishi zarur. Cheklangan endogen ishlab chiqarilish yo‘g‘on ichak mikrobiotasi tomonidan amalga oshadi. Karboksilaza fermentlari uchun kofaktor sifatida biotin uglevod va lipid metabolizmini boshqaruvchi yo‘llarni qo‘llab-quvvatlaydi, glikogen sinteziga va oqsil utilizatsiyasiga hissa qo‘shadi hamda teri va nevrologik funksiyalar uchun muhim ahamiyatga ega. Oziq manbalari: butun don mahsulotlari, xamirturush, tuxum sarig‘i, sut mahsulotlari, go‘sht va ichki a’zolar (jigar, buyrak), dukkaklilar, yong‘oqlar, sabzavot va mevalar. Issiqlik bilan qayta ishlash B‑vitaminlari miqdorini kamaytıradi, spirtli ichimliklar, nikotin va kofein esa ularning parchalanishini kuchaytirishi mumkin. Klinik jihatdan ahamiyatli gipervitaminoz kam uchraydi.
| O'lchov birligi | ng/mL | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Referens oraliq |
| |||||||||
| Ko'rsatmalar | Concern for biotin deficiency due to poor dietary intake, Altered gut microbiota (gastrointestinal dysbiosis), Current anticonvulsant therapy, Extended or repeated courses of antibiotics, Pregnancy, Malabsorption disorders, such as celiac disease, cystic fibrosis, inflammatory bowel disease, or pancreatic insufficiency, Active tobacco use, Paresthesias—numbness, tingling, or burning sensations, Inflammatory skin disease (eczema, dermatitis, psoriasis) or acneiform eruptions, Anemia, Hypercholesterolemia, Hyperglycemia, Developmental delay or hypotonia in children, Hair thinning or loss, alopecia, or premature canities (early graying), Suspected inherited defects of biotin metabolism (biotinidase deficiency, multiple carboxylase deficiency) |
Namunangiz talablari
| Namunangiz | Zardob |
|---|---|
| Container | Oltin/yo'lbars qopqoqli probirka (SST, gel ajratgich) |
| Hajm | 1 mL (min 0.5 mL) |
| Saqlash tayyorlik | Xona harorati, Sovutilgan, Muzlatilgan |
References
Henry's Clinical Diagnosis and Management by Laboratory Methods, 23rd ed. McPherson RA, Pincus MR. St. Louis, MO: Elsevier; 2016:424–425.
Clinical Laboratory Diagnostics: National Guidelines. Vol 1. Eds. V.V. Dolgov, V.V. Menshikov. Moscow: GEOTAR‑Media; 2012:248–249.