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The purpose of this study is to find blood plasma based biomarkers of disease progression in neurofibromatosis type 1 (NF1). NF1 is associated with the development of benign cutaneous tumors as well as a variety of malignancies. Analysis of plasma DNA and chemical composition may provide tools for diagnosis and follow-up of NF1. The hypothesis of the study is that NF1-associated tumor burden and malignant transformation of tumors can be detected in plasma. To test this hypothesis, Finnish patients with NF1 are recruited and blood sample is taken. Blood plasma is separated and analyzed chemically. DNA is then also extracted and quantified.
Neurofibromatosis type 1 (NF1) is a dominant hereditary multiorgan disease that causes both benign cutaneous neurofibromas and malignant tumors. Timely detection of malignant transformation in NF1 tumors is of great clinical importance. Also methods to easily monitor individual's overall tumor burden would be useful. Blood plasma is collected from NF1 patients and age- and gender-matched controls. The samples are stored at -80 C until analysis. Free circulating plasma DNA is extracted and quantified using commercial reagents. Also a previously described chemical detection method to observe overall changes in plasma composition is utilized. The analysis results are compared between NF1 patients and healthy controls, and also correlated with NF1 tumor burden and diagnosis of malignancy during five-year follow-up.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Neurofibromatosis 1 | 10 mL venous blood sample taken from patients with type 1 neurofibromatosis |
| |
| Control | 10 mL venous blood sample taken from age- and gender-matched healthy controls |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Blood sample | Other | 10 mL venous blood sample for analysis of plasma |
|
| Measure | Description | Time Frame |
|---|---|---|
| Ability of free circulating plasma DNA concentration and unspecific chemical detection method to predict overall tumor burden | Tumor burden assessed by clinician on a four-level scale: 1 = 0-5 neurofibromas, 2 = 6-99 neurofibromas, 3 = 100-500 neurofibromas, 4 = over 500 neurofibromas | Up to 5 years |
| Ability of free circulating plasma DNA concentration and unspecific chemical detection method to predict clinical diagnosis of malignancy | Information on clinical diagnoses is obtained from patient records | Up to 5 years |
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Inclusion Criteria:
Exclusion Criteria:
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Patients visiting Turku Neurofibromatosis Centre (Finland) for care of their disease. Controls are healthy volunteers from Turku area.
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| Name | Affiliation | Role |
|---|---|---|
| Juha Peltonen, Professor | University of Turku | Principal Investigator |
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Molecular biology results and relevant clinical information will be shared along publication. Some clinical information is subject to privacy issues and cannot be shared.
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| ID | Term |
|---|---|
| D009456 | Neurofibromatosis 1 |
| ID | Term |
|---|---|
| D017253 | Neurofibromatoses |
| D009455 | Neurofibroma |
| D018317 | Nerve Sheath Neoplasms |
| D009380 | Neoplasms, Nerve Tissue |
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| ID | Term |
|---|---|
| D001800 | Blood Specimen Collection |
| ID | Term |
|---|---|
| D013048 | Specimen Handling |
| D019411 | Clinical Laboratory Techniques |
| D019937 | Diagnostic Techniques and Procedures |
| D003933 | Diagnosis |
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Free circulating DNA extracted from blood plasma
| D009370 |
| Neoplasms by Histologic Type |
| D009369 | Neoplasms |
| D009386 | Neoplastic Syndromes, Hereditary |
| D020752 | Neurocutaneous Syndromes |
| D009422 | Nervous System Diseases |
| D020271 | Heredodegenerative Disorders, Nervous System |
| D019636 | Neurodegenerative Diseases |
| D010523 | Peripheral Nervous System Diseases |
| D009468 | Neuromuscular Diseases |
| D030342 | Genetic Diseases, Inborn |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |
| D011677 | Punctures |
| D013514 | Surgical Procedures, Operative |
| D008919 | Investigative Techniques |