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Automatization of FVIII chromogenic assay to STA R Max 3
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Protein Science.
2022 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [sv]

Octanate är ett FVIII-koncentrat erhållet från human blodplasma vilken produceras hos läkemedelsföretaget Octapharma. Den manuella kromogen substrat-analysen som idag används för bestämning av FVIII-aktivitet i Octanateprover har i detta projekt automatiserats till hemostasanalysatorn STA R Max 3. Analysprincipen för den automatiska metoden är baserad på samma analysprincip som den manuella metoden, det vill säga att FVIII kan analyseras utifrån sin kofaktoraktivitet för aktivering av Faktor X tillsammans med Faktor IX. Arbetshypotesen i projektet var: baserat på den nuvarande manuella metoden för bestämning av FVIII-aktivitet och kunskap om STA R instrumentet, kan en effektiv och robust metod utvecklas på STA R instrumentet, vilket skulle förbättra analysens kvalité samt skapa en mindre ansträngande arbetsmiljö. Tre olika experiment har genomförts: linjäritet, noggrannhet samt FXa-generation. Experimenten utfördes med reagenskitet BIOPHEN™ FVIII:C från hyphen biomed och human koaguleringsfaktor VIII koncentrat BRP batch 6 användes som standard. Baserat på de genomförda experimenten visade den automatiska metoden för bestämning av FVIII-akivitet god linjäritet, noggrannhet och precision inom intervallet 0,005 till 0,017 IE/ml, men detta måste demonstreras yttligare vid flera testtillfällen för att metoden ska kunna användas på Octapharma. Analys med den automatiska metoden skulle innebära en mindre ansträngd miljö för analytikerna samt spara tid genom mindre manuell hantering och snabbare resultatgenerering.

Abstract [en]

Factor VIII (FVIII) is a crucial blood clotting protein and deficiency or absence of FVIII results in the congenital bleeding disorder haemophilia A. Octanate is a plasma derived FVIII concentrate produced at the pharmaceutical company Octapharma. The manual chromogenic substrate method of analysis for determining FVIII activity in Octanate samples has in this project been automated to the hemostasis analyzer STA R Max 3. The analysis principle for the automated method was based on the same principle as the manual method, that is FVIII can be analyzed by its activity as a cofactor for the activation of Factor X by Factor IXa. The working hypothesis for the project has been: based on the current manual method for determination of FVIII activity and knowledge about the STA R instrument, an efficient and robust method can be developed for the STA R instrument, improving the quality of the analysis, and creating a less strenuous work environment. Evaluation of three different experiments were performed: linearity, accuracy, and FXa generation. The experiments were performed with a reagent kit BIOPHEN™ FVIII:C from hyphen biomed and human coagulation Factor VIII Concentrate BRP batch 6 as a standard. The developed automated method for determination of FVIII activity showed suitable linearity, accuracy, and precision in the range 0.005 to 0.017 IU/mL based on the experiments in this project but this must be further demonstrated at several different test occasions to be used as a method of analysis at Octapharma. Analysis with the automatic method would involve less strenuous work for the analyst and time saving with less manually work and generating faster results.

Place, publisher, year, edition, pages
2022.
Series
TRITA-CBH-GRU ; 2022:198
Keywords [en]
STA R max 3, automatization, Factor VIII, FVIII, method development
National Category
Pharmaceutical and Medical Biotechnology
Identifiers
URN: urn:nbn:se:kth:diva-314591OAI: oai:DiVA.org:kth-314591DiVA, id: diva2:1673960
External cooperation
Octapharma
Subject / course
Biotechnology
Educational program
Master of Science - Medical Biotechnology
Supervisors
Examiners
Available from: 2022-06-21 Created: 2022-06-21 Last updated: 2025-02-17

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