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  • 1.
    Kader, Shoxan
    Högskolan i Skövde, Institutionen för biovetenskap.
    Modulation of nlrp3 inflammasome by sp110: Regulation and inhibition of NLRP3 inflammasome in Sp110 deficient THP-1 cells2016Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
  • 2.
    Rai, Vijeta
    Högskolan i Skövde, Institutionen för biovetenskap.
    Screening of large collection of compounds for anti-human parainfluenza virus type-2 activity and evaluation of hit compounds2017Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Human parainfluenza virus type-2 (HPIV-2) is a highly contagious respiratory pathogen that can cause severe respiratory disease known as laryngotracheobronchitis or croup-like disease in children. No specific vaccine or an antiviral drug is currently approved for treatment of HPIV-2 infections. In this project, a library of 14400 diverse compounds had been screened for anti-HPIV-2 activities in cultures of African green monkey kidney cells. All compounds that inhibited the virus induced syncytium-forming activity in these cells were considered as hit compounds. Three hit compounds showed moderate anti-HPIV-2 activity characterized by the IC50 values of 20 µM and selectivity indices of approximately 5. This suggests that the antiviral activity of these compounds was due to targeting activities of cellular rather than viral components. Another hit compound, referred to as compound 5, showed anti-HPIV-2 activity that was manifested as a reduction of area of the virus-induced plaques in cells at not cytotoxic concentrations. Interestingly, this compound did not inhibit initial infection nor the virus production in infected cells as revealed by the time-of-addition assay. Moreover, it showed no direct the virus-inactivating (virucidal activity) against HPIV-2 particles. However, relatively short pre-treatment (4 hours) of the cells with compound 5 prior to the virus infection was sufficient for its plaque size-reducing activity suggesting that anti-HPIV-2 activity of compound 5 was due to targeting activities of cellular rather than viral components. Further studies are needed to elucidate the anti-HPIV-2 mechanism of activity of hit compounds identified in the present study.

  • 3.
    Yngve, Sara
    Högskolan i Skövde, Institutionen för biovetenskap.
    Optimization of PCR Sensitivity for Detection of Bacterial Species in Blood of Patients with Suspected Sepsis2015Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Sepsis is commonly caused by bacteria, fungi or both present in the blood stream during inflammation. In response, inflammatory cascades are released in multiple organ systems which if prolonged causes sepsis and can eventually lead to organ failure and death. The major diagnostic technique of sepsis is blood culturing. However, the technique is time consuming and lacks sensitivity; especially in patients under antimicrobial therapy. Molecular techniques particularly PCR could possibly become implemented in sepsis diagnostics in the future. The aim of the thesis was to compare the effect on PCR sensitivity by different PCR kits, with optimized PCR conditions to find an ideal Real-time PCR applicable for direct detection of rRNA or rDNA in whole blood, using the 16S rDNA gene. The study also surveyed the overall background flora of bacterial species circulating in the blood. During the optimization Haemophillus influenzae and Streptococcus pneumoniae were added to whole blood, rRNA or rDNA was isolated and extracted and subsequently processed by Real-time PCR. Four commercially available PCR kits were compared. Attempts using rRNA did not significantly increase the PCR sensitivity. LightCycler FastStart DNA Master SYBR Green I kit (Roche Diagnostics) used for rDNA, generated low cp-values, the cleanest sequences and the finest separation between amplification curves. Twenty whole blood and pre-cultured patient samples were processed by the optimized PCR. The effect on PCR sensitivity by pre-culturing patient blood samples was studied and no statistical difference was noted. Increased PCR sensitivity is essential for implementation of PCR techniques in sepsis diagnostics.

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