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Vasopressinmarkören Copeptin: Beskrivning av analysförfarande och användningsområde
Malmö University, Faculty of Health and Society (HS), Department of Biomedical Science (BMV).
2022 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
The Vasopressin marker Copeptin : Description of the assay procedure and area of use. (English)
Abstract [sv]

Vasopressin är ett viktigt hormon som har många fysiologiska funktioner, däribland upprätthållandet av vätskebalansen i kroppen. Mätning av detta hormon är dock komplicerat och därför används ”skuggfragmentet” copeptin, som härstammar från samma prekursor. Genom användandet av metoden B·R·A·H·M·S KRYPTOR compact PLUS mäts copeptin. Studiens syfte är att beräkna variations-koefficienten och därmed undersöka de uppmätta värdenas reproducerbarhet. Vidare blir syftet att använda EpiHealth-kohortstudien för att validera den redan kända kopplingen mellan copeptin och förhöjt blodsocker genom en multivariant linjär regression. Vi kan i arbetet konstatera att copeptin metoden har en god reproducerbarhet, där majoriteten av de multipelt uppmätta copeptin-värdena har en inter-assay CV <8%. Vid undersökning av EpiHealth-kohorten fann vi att en ökning av copeptin var kross-sektionellt associerad med ett flertal metabola riskmarkörer, däribland fastande plasma-glukos, efter multivariant justering. Att copeptin var signifikant relaterat till denna potenta metabola riskmarkör kan tyda på att det finns ett orsakssamband mellan förhöjt vasopressin och förhöjt blodsocker, något som även tidigare studier har pekat på. Detta i sin tur visar att vasopressin kan spela en roll i utvecklandet av typ 2-diabetes. Om ett orsaks-samband föreligger undersöks nu i en stor randomiserad klinisk studie där vasopressin-nivåerna hos hälften av deltagarna sänks med hjälp av ökat vatten-intag (H2O-metab-studien). Det finns förhoppningar om att användandet av copeptin skall kunna användas i klinisk verksamhet för att riskbedöma individer avseende kardiometabola sjukdomar (däribland typ 2-diabetes).

Abstract [en]

Vasopressin is an important hormone that has many physiological functions, including the maintenance of fluid balance in the body. Measurement of this hormone is however complicated and therefore the "shadow fragment" copeptin is used, which is derived from the same precursor. Using the BRAHMS copeptin proAVP KRYPTOR method, copeptin was measured in this study. The purpose of the study is to calculate the coefficient of variation, and thus examine the reproducibility of the measured values ​. Furthermore, the aim will be to use the EpiHealth cohort study was used to validate the link between copeptin and elevated blood sugar through a multivariate linear regression. The majority of the multiple measurements of copeptin values had an inter-assay CV <8%, which indicates that the method has a good reproducibility. Examination of the EpiHealth cohort revealed that elevated copeptin was cross-sectionally associated with a number of metabolic risk markers, including fasting plasma glucose, after multivariate adjustment, a finding that is in line with previous findings from epidemiological studies. The fact that copeptin was significantly related to this potent metabolic risk marker may indicate a causal role of the vasopressin system in elevated blood glucose and may play a role in the development of type 2 diabetes metillus. Previous experimental and genetical studies have indicated a causal association between elevated vasopressin and diabetes development. Currently, a randomized clinical trial is ongoing (the H2O-metab-study) in order to investigate a possible causal association between elevated vasopressin and glucose. In the study, increased water intake is used to lower plasma vasopressin (measured as copeptin), and the glucose-lowering potential of this water treatment is tested. There are hopes that copeptin can in the future be used in clinical practice for risk assessment with respect to cardiometabolic diseases (including type 2 diabetes).

Place, publisher, year, edition, pages
2022. , p. 20
Keywords [en]
B·R·A·H·M·S KRYPTOR compact PLUS, Copeptin, glucagon, H2O-Metab-Study, metabolic risk factors, type 2 diabetes, vasopressin.
Keywords [sv]
B·R·A·H·M·S KRYPTOR compact PLUS, Copeptin, glukagon, H2O-Metab-Sudie, metabola riskmarkörer, Typ 2-diabetes, vasopressin.
National Category
Biomedical Laboratory Science/Technology
Identifiers
URN: urn:nbn:se:mau:diva-54462OAI: oai:DiVA.org:mau-54462DiVA, id: diva2:1689060
External cooperation
Laboratoriet för Kardiovaskulär forskning - Hypertoni, IKVM
Educational program
HS Biomedicinsk laboratorievetenskap
Supervisors
Examiners
Available from: 2022-08-22 Created: 2022-08-22 Last updated: 2022-08-22Bibliographically approved

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