Mwaranzi yeUltraviolet (UV), ingave inobva kuzuva rechisikigo kana kubva kuzvinhu zvakagadzirwa zvakaita semichina yezuva (sunbeds), ine mhedzisiro yakaoma pakudzivirira muviri kwevanhu. Kunyange zvazvo kusvibiswa neUV kuri pakati nepakati kuchitsigira kugadzirwa kwevhitamini D—iyo inobatsira pakushanda kwemuviri—kusvibiswa zvakanyanya, kunyanya kubva kumidziyo yekuchenesa muviri, kunogona kudzvinyirira dziviriro mumuviri uye kuwedzera njodzi kuhutano.
Chiedza cheUV chinoita sei pakudzivirira muviri?
1. Mwaranzi yeUV uye Kuchinja kweMadziviriro Emuviri
A. Migumisiro yekudzivirira muviri
Kudzvinyirirwa kweMadziviriro Emuviri Munharaunda:
Mwaranzi yeUVB (280–315 nm) uye UVA (315–400 nm) inopinda muganda, ichikuvadza DNA mu keratinocytes nemasero ekudzivirira muviri.
Izvi zvinokonzeresa kuburitswa kwema cytokines anodzvinyirira immune (semuenzaniso, IL-10, TNF-α), zvichideredza kugona kweganda kurwisa hutachiona nekenza.
Masero eLangerhans (masero makuru ekudzivirira muviri ari paganda) anoderera, zvichiita kuti antigen isashande zvakanaka.
Kudzvinyirirwa kweMadziviriro Emuviri:
Kugara uchisangana neUV (kunyanya UVA mumibhedha yeganda) kunogona kudzvinyirira mashandiro eT-cell, zvichideredza dziviriro yemuviri kubva kuhutachiona nemajekiseni.
Zvidzidzo zvinobatanidza kushandiswa zvakanyanya kwemibhedha yekuchenesa ganda (tanning bed) nekuwedzera kwekutapukirwa nehutachiona (semuenzaniso, herpes simplex, HPV) uye hutachiona hweganda hwebhakitiriya.
B. Vhitamini D uye Mabhenefiti eMuviri Wemuviri
Vhitamini D inokonzerwa neUVB inowedzera simba rekudzivirira muviri nekukurudzira kugadzirwa kwepeptide inorwisa utachiona (semuenzaniso, cathelicidin).
Zvisinei, michina yekutsvukisa ganda inoburitsa UVA yakawanda, iyo isingaburitse vhitamini D zvinobudirira, zvichideredza mukana uyu.
Kukanganiswa kwemwaranzi ye ultraviolet pakudzivirira muviri kunogona kugadziriswa sei nesainzi?
1. Deredza frequency uye nguva yekudzora.
Nguva dzekuisa ganda paganda hadzifanirwe kudarika maminetsi gumi uye hadzifanirwe kudarika kaviri pasvondo kudzivirira kusvibiswa kwenguva refu.
2. Simbisa kutarisirwa kwemurwere asati avhiyiwa uye mushure mekuvhiyiwa.
Kunyorovesa nekushandisa mishonga inorwisa mabhakitiriya (vhitamini C naE) pamwe nemishonga inovandudza ganda zvinogona kuderedza kukuvara kunokonzerwa nemwaranzi ye ultraviolet.
3. Teererai shanduko dziri kuitika mumuviri.
Tsvaga rubatsiro rwechiremba nekukurumidza kana ukasangana nezvirwere zvinodzokorora, kuvaviwa kweganda kusingawanzoitiki, kana erythema, uye kana ukarega kushandisa zvigadzirwa zvekutsvukisa ganda.