I-crystalline powder emhlophe;Ayincibiliki emanzini naku-petroleum ether, encibilika ku-ethyl acetate ne-methanol;mp yi-115-116 ℃;Ukujikeleza okuqondile [α]20D+15.8°(0.5-2.0 mg/ml, i-methanol).
Isetshenziselwa ukuhlanganiswa kwe-polypeptide, njenge-monomer yokuvikela i-amino acid.
I-O-benzyl-l-threonine yamiswa kusixazululo se-dioxane futhi yafakwa i-acylated nge-tert-butylcarbonyl azide ukuze kutholwe umkhiqizo ongahluziwe, okhishwe nge-ethyl acetate ku-pH engu-9-10 yase iphinde yahlanganiswa.
Ingxenye esebenzayo ye-thymic oietin Ⅱ ye-thymus secretions.I-Thymoietin II iyinhlanganisela ye-polypeptide eyodwa ehlukanisiwe ne-thymus hormone.Yakhiwe ngama-amino acid angama-49, futhi ucezu lweketango le-peptide elakhiwe ama-amino acid ayi-5 linemisebenzi efanayo yezemvelo njenge-thymoietin II.Ngakho-ke, lesi siqeshana se-pentapeptide sibizwa ngokuthi i-thymus pentapeptide.I-white friza-yomiswa isisindo esixekethile noma impushana.
Enye yezindima ze-thymus pentapeptide ukunxenxa ukuhlukaniswa kwamaseli e-T.Ingakwazi ukukhetha ngokukhetha ukuguqulwa kwamaseli e-Thy-1- prothorax abe amaseli e-Thy-1+ T.Ukuhlukaniswa kwamaseli e-T kulamula ngokwanda kwamazinga e-cAMP e-intracellular.Omunye umsebenzi oyisisekelo we-thymus pentapeptides uwukubopha kuma-receptors athile egazi legazi le-T cell avuthiwe, ukwandisa izinga le-cAMP ye-intracellular, futhi ngaleyo ndlela kubangele uchungechunge lokusabela kwe-intracellular, okubuye kube isisekelo somsebenzi wayo wokuzivikela komzimba.Esimweni esijwayelekile somzimba, i-thymus pentapeptide ibonise umphumela wokuvuselela amasosha omzimba, ongakhuphula kakhulu izinga lokwakheka kwe-E rosette kanye nezinga lokuguqulwa kwama-splenic lymphocytes, kuthuthukise izigaba ezihlukene zokuphendula komzimba okuyisisekelo noma kwesibili, futhi kwandise inani lohlobo lwe-IgM kanye ne-IgG noma Uhlobo lwe-IgA lwama-antibody akha amaseli.I-Thymus pentapeptide ingabuye ithuthukise ukusebenza kwe-phagocytosis yama-macrophage, ikhulise umsebenzi we-enzyme kanye ne-phagocytosis yama-polymorphonuclear neutrophils, ikhulise okuqukethwe kwe-antibody ejikelezayo, futhi ithuthukise ukusebenza komzimba kwamangqamuzana abomvu egazi.I-Thymus pentapeptide ingenza kusebenze amaseli e-CD4 nama-CD8 positive, ukuze amaseli athile e-Tc akwazi ukugcina impilo ende, kodwa futhi akwazi ukwenza amaseli e-T asebenze futhi enze umsebenzi wamaseli e-Ts.Imiphumela elwa namagciwane kanye neyokwelapha ye-thymus pentapeptide ihlobene nokuthuthukiswa kwayo komsebenzi weseli le-TC.Inani elifanele le-thymus pentapeptide lingakhuphula kakhulu ukukhiqizwa kwe-interferon ekuvikelekeni kwe-anti-infection.Ukunxenxa nokukhuthaza ukuhlukaniswa nokuvuthwa kwama-T cell;I-CD4/CD8 ijwayele ukuba yinto evamile ngokulawula ingxenye ye-T lymphocyte subsets;Thuthukisa umsebenzi we-phagocytosis wama-macrophages;Thuthukisa ukusebenza kokuzivikela kwamangqamuzana egazi abomvu;Ukwandisa umsebenzi wamangqamuzana abulalayo emvelo;Khulisa izinga lokukhiqizwa kwe-interleukin-2 kanye nenkulumo ye-receptor;Thuthukisa ukukhiqizwa kwe-γ interferon kumaseli egazi e-mononuclear;Thuthukisa umsebenzi we-SOD ku-serum.
Ingasetshenziswa ezigulini zesimila esiyingozi ezinokukhubazeka komsebenzi wokuzivikela komzimba ngemva kwe-radiotherapy kanye ne-chemotherapy.Ukwelashwa kwe-hepatitis B;Ukuhlinzwa okukhulu kanye nezifo ezinzima;izifo ezizimele ezifana ne-rheumatoid arthritis, lupus erythematosus;Isifo sikashukela sohlobo II, i-menopause syndrome;Umuntu onomzimba obuthakathaka.