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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02526628
Other study ID # 2015_KS_TESTOSTERONE
Secondary ID
Status Completed
Phase
First received
Last updated
Start date September 2015
Est. completion date August 21, 2019

Study information

Verified date January 2018
Source University of Aarhus
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The haemostatic balance and neurocognitive capability of men with Klinefelter syndrome is compared to healthy controls by using specific biochemical assays for coagulation and fibrinolysis and a selection of neuropsychological tests and brain fMRI. Furthermore, the effect of gonadal status and any effects of long- or short-term testosterone treatment on the above mentioned parameters are investigated.


Description:

Klinefelter syndrome (KS) affects approximately 1 in every 600 males, but remains severely underdiagnosed. Men with KS are more prone to a wide range of diseases including thrombotic disorders. Also, neurocognitive function is impaired in KS. The background for the increased thrombosis proneness is not understood, and also it is not understood how testosterone treatment affects the thrombosis risk in KS. The effects of testosterone treatment on neurocognition in KS is also not completely understood. However, it is speculated that testosterone treatment at an early point could help improve the overall neurocognitive performance.

In this study 30 males with KS receiving testosterone treatment, 30 males with KS not receiving testosterone treatment and 60 matched healthy male controls are included. After initial examination including blood testing and neurocognitive testing, the subjects are followed for 18 months and examined a second time. After initial examination the group of previously untreated KS males will be put on standard testosterone treatment according to current guidelines.

Groups will be compared by measuring and array of markers for coagulation and fibrinolysis, including thrombin generation and fibrin structure analysis, to assess the haemostatic balance. Also, a wide array of neurocognitive tests and brain fMRI is applied to compare the neurocognitive function between the groups.


Recruitment information / eligibility

Status Completed
Enrollment 90
Est. completion date August 21, 2019
Est. primary completion date August 21, 2019
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Male
Age group 18 Years to 70 Years
Eligibility Inclusion Criteria:

- Klinefelter syndrome with 47 XXY karyotype

- Healthy male

Exclusion Criteria:

- Known thrombophilia

- Previous thrombotic event

- Chronic or acute illness affecting the haemostatic balance (e.g. diabetes, cancer).

- Previous or current disease affecting the brain

- Weight above 120 kg

- Current abuse of stimulants affecting the brain

- Unability to complete MR-scan (e.g. claustrophobia, internal metal objects)

Study Design


Related Conditions & MeSH terms


Locations

Country Name City State
Denmark Department for Endocrinology and Internal Medicine Aarhus

Sponsors (5)

Lead Sponsor Collaborator
University of Aarhus Aarhus University Hospital, Hospital of South West Denmark, Sygehus Lillebaelt, University of Southern Denmark

Country where clinical trial is conducted

Denmark, 

Outcome

Type Measure Description Time frame Safety issue
Primary Differences in thrombin generation Thrombin generation using the CAT assay is assessed as ETP (nM thrombin), peak height (nM thrombin) and lag time (minutes). All variables are assessed at inclusion and after a 18 month follow-up. Groups are compared statistically at each time point and any changes during follow-up is also analysed. Time 0 and after 18 months followup
Primary Differences in fibrin clot properties Fibrin clot properties is assessed by fibrin structure analysis in plasma samples. All variables are assessed at inclusion and after a 18 month follow-up. Groups are compared statistically at each time point and any changes during follow-up is also analysed. Time 0 and after 18 months followup
Primary Difference in neurocognition neurocognition is assessed using a wide array of psychological tests (e.g. Wais-III, Stroop test, Wisconsin Card Sorting Test and others) All variables are assessed at inclusion and after a 18 month follow-up. Groups are compared statistically at each time point and any changes during follow-up is also analysed. Time 0 and after 18 months followup
Secondary Differences in blood coagulation and fibrinolysis parameters between groups Coagulation and fibrinolysis can not be adequately assessed by analysis of a single parameter. To evaluate the overall status of these systems an array of analyses are needed, and further more need to be interpreted by experts within the field. Thus, severeal markers of coagulation and fibrinolysis including INR, APTT, single coagulation factors, PAI-1 and others are to be assessed at inclusion and after a 18 month follow-up. Groups are compared statistically at each time point and any changes during follow-up is also analysed. Besides applying statistics, the compiled results will also be interpreted by experts within the field to provide an overall characterization of the haemostatic balance in the individual groups and by comparison to each other. Time 0 and after 18 months followup
Secondary Differences in fMRI between groups fMRI will be performed to evaluate the response in the brain to various stimuli and tests, with the overall purpose of examining speech, memory and other cognition related features. Once at followup
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