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torsdag 8 december 2016
HIV-1 vuonna 2005
Rutosissa on toistaiseksi voitunpitää hiv leviäminen kontrollissa vuoden 2005 SoS-raportin mukaan. Sen sijaan näyttää hiv leviävän kovin vahvasti mm. Baltian maissa ja Venäjällä. uusia tapauksia tulee Ruotsiin maahnamuutatjien mukana korkean riskin alueilta. koska muutkin sp-taudit lisääntyvät miesten kesken, on riskiä myös hiv infektion lisääntymsiestä niissä ryhmissä. ne joilla on hiv diagnoosi vuonna 2005, saivat tartuntansa 1- 10 vuotta aiemmin.
Hittills har spridningen av hiv i Sverige kunnat hållas under god kontroll, trots att hiv ökat dramatiskt bl.a. i Baltikum och Ryssland. Nya fall av hiv kommer framför allt från invandrade personer från högriskområden. Eftersom andra könssjukdomar ökar i gruppen män som har sex med män, finns en risk för att även hiv kommer att öka i denna grupp. Personer som i dag få en hiv-diagnos har smittats för ett till tio år sedan.
lördag 31 december 2011
(6) HIV-1 ja mannoosia sitova lektiini, komplementtil
Source
Division of Biology, Howard Hughes Medical Institute, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
Abstract
Cyanovirin-N (CV-N) is a small, cyanobacterial lectin that neutralizes many enveloped viruses, including human immunodeficiency virus type I (HIV-1). This antiviral activity is attributed to two homologous carbohydrate binding sites that specifically bind high mannose glycosylation present on envelope glycoproteins such as HIV-1 gp120. We created obligate CV-N oligomers to determine whether increasing the number of binding sites has an effect on viral neutralization. A tandem repeat of two CV-N molecules (CVN(2)) increased HIV-1 neutralization activity by up to 18-fold compared to wild-type CV-N. In addition, the CVN(2) variants showed extensive cross-clade reactivity and were often more potent than broadly neutralizing anti-HIV antibodies. The improvement in activity and broad cross-strain HIV neutralization exhibited by these molecules holds promise for the future therapeutic utility of these and other engineered CV-N variants.
- PMID:
- 21799112
- [PubMed - indexed for MEDLINE]
- PMCID: PMC3161612
- [Available on 2012/2/23]
(5) HIV ja komplementtikaskadi
Neurobiol Dis. 2005 Oct;20(1):12-26. Increase of C1q biosynthesis in brain microglia and macrophages during lentivirus infection in the rhesus macaque is sensitive to antiretroviral treatment with 6-chloro-2',3'-dideoxyguanosine.
Source
Department of Molecular Neuroscience, Institute of Anatomy and Cell Biology, Philipps University, Robert-Koch-Str. 8, 35033 Marburg, Germany.
Abstract
Complement activation in the brain contributes to the pathology of neuroinflammatory and neurodegenerative diseases such as neuro-AIDS. Using semiquantitative in situ hybridization and immunohistochemistry, we observed an early and sustained increase in the expression of C1q, the initial recognition subcomponent of the classical complement cascade, in the CNS during simian immunodeficiency virus (SIV) infection of rhesus macaques.
Cells of the microglial/macrophage lineage were the sources for C1q protein and transcripts.
- Mikroglia/ makrofagi linjan soluissa on komplementin C1q proteiinia ja transkriptejä.
C1q expression was observed in proliferating and infiltrating cells in SIV-encephalitic brains.
All SIV-positive cells were also C1q-positive.
- SIV-positiivisissa soluissa oli Cq1 positiivisuus.
Treatment with the CNS-permeant antiretroviral agent 6-chloro-2',3'-dideoxyguanosine decreased C1q synthesis along with SIV burden and focal inflammatory reactions in the brains of AIDS-symptomatic monkeys.
- C1q komplementtitekijän synteesin vähenemä antiretroviraalisesta lääkityksestä vähensi SIV viruskuormitusta ja paikallistulehdusta aivoissa.
Thus, activation of the classical complement arm of innate immunity is an early event in neuro-AIDS and a possible target for intervention.
- Tutkijat ovat sitä mieltä että neuro-AIDS:in varhaistapahtumissa oleva klassisen komplementtilinjan aktivoaatio on mahdollinen interventiokohde.
- PMID:
- 16137563
- [PubMed - indexed for MEDLINE]