- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT01158794
Genes Influencing Iron Overload State
Iron overload, which can be defined operationally as too much iron in the body, develops as a consequence of too many blood transfusions given, or due to genetic defects hereditary hemochromatosis). Iron accumulates in several organs in the body, such as the heart, liver, endocrine glands (pancreas, thyroid, etc.), and spleen. Excessive iron can damage organs and may even cause death. Iron overload needs to be appropriately monitored and treated to avoid unnecessary morbidity and mortality.
The present study, GENIOS, proposes to test prospectively the hypothesis that genetic modifiers influence the iron overload status of patients receiving transfusions. To test this hypothesis, the study will perform genetic studies to investigate possible genetic influences for iron accumulation in the body and will study iron accumulation not only in the liver, but also in the heart, pancreas, kidneys, and spleen. In addition: the study will investigate if these same genes have any role during treatment of iron overload, in other words, if certain genetic mutations will influence how iron exits the body. This study will also investigate how substances that are known to control the trafficking of iron in and out of the body and its damaging effects to the tissues (hepcidin and non transferrin-bound iron) are linked to the accumulation of iron in the heart and liver. Iron in the body will be measured by R2*MRI and no liver biopsies will be required. Genetic studies will be done by specialized tests using peripheral blood DNA.
Iron accumulates differently in different people and in different organs of the body. Some people accumulate iron faster than others, even when receiving the same number of blood transfusions
Studienübersicht
Status
Bedingungen
Detaillierte Beschreibung
This study will focus on the following primary objective:
- To investigate the association of GSTM1 gene deletion and liver iron concentration in patients with sickle cell disease and transfusional iron-overload.
The Secondary Objectives of the study are:
- To explore the role of other iron metabolism-associated candidate genes on liver iron concentration of sickle cell patients with transfusional iron-overload.
- To explore the role of GSTM1 genotypes and other iron metabolism-associated candidate genes on maintenance and decline of liver iron concentration of patients with sickle cell disease and transfusional iron-overload.
- To explore the role of GSTM1 genotypes and other iron metabolism-associated candidate genes on increase, maintenance, and decline of iron concentration in the heart, pancreas, kidneys, and spleen of patients with sickle cell disease and transfusional iron overload.
- To explore the role of GSTM1 gene deletion and other iron metabolism-associated candidate genes on increase, maintenance, and decline of iron concentration in the liver, heart, pancreas, kidneys, and spleen of non-sickle cell patients with transfusional iron-overload.
- To explore the relationship between Non-Transferrin Bound Iron (NTBI), hepcidin, organ function, and iron increase, maintenance, and decline in the liver, heart, pancreas, kidneys, and spleen of patients with transfusional iron overload.
Studientyp
Einschreibung (Tatsächlich)
Kontakte und Standorte
Studienorte
-
-
Tennessee
-
Memphis, Tennessee, Vereinigte Staaten, 38105
- St. Jude Children's Research Hospital
-
-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Kind
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- History of ≥ 12 lifetime erythrocyte transfusions who have not yet initiated treatment to unload iron (iron chelation or therapeutic phlebotomy), or
- History of ≥ 12 lifetime erythrocyte transfusions who have initiated treatment to unload iron, but had liver iron content measurement (by R2*MRI) within 3 months prior to initiation of iron unloading treatment
Exclusion Criteria
- Known contraindication to performance of MRI (e.g.: presence of MRI-incompatible ferromagnetic material in the body)
- Prior participation on the St. Jude MRIRON protocol
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
---|
Study participants
Participants with sickle cell disease and transfusional iron-overload, and non-sickle cell disease (thalassemia major, cancer patients, etc.) and iron overload.
Participants with iron overload, defined as too much iron in the body as a consequence of too many blood transfusions.
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
---|---|---|
This study will measure genetic modifiers influencing the iron overload status of patients receiving transfusions.
Zeitfenster: Once, at participant enrollment
|
This study will measure the association between GSTM1 gene deletion and other candidate genes and the accumulation and clearance of body iron.
|
Once, at participant enrollment
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
---|---|---|
To explore the role of other iron metabolism-associated candidate genes on liver iron concentration of sickle cell patients with transfusional iron-overload.
Zeitfenster: Once, at participant enrollment
|
Once, at participant enrollment
|
|
To explore the role of GSTM1 genotypes and other iron metabolism-associated candidate genes on maintenance and decline of liver iron concentration of patients with sickle cell disease and transfusional iron-overload.
Zeitfenster: Once at baseline compared to 3 years after participant enrollment
|
Once at baseline compared to 3 years after participant enrollment
|
|
Explore the role of GSTM1 genotypes and other iron metabolism-associated candidate genes on increase, maintenance, and decline of iron concentration patients with sickle cell disease and transfusional iron overload.
Zeitfenster: Once at baseline compared to 3 years after participant enrollment
|
Decline of iron concentration is in the heart, pancreas, kidneys, and spleen.
|
Once at baseline compared to 3 years after participant enrollment
|
Explore the role of GSTM1 gene deletion and other iron metabolism-associated candidate genes on increase, maintenance, and decline of iron concentration of non-sickle cell patients* with transfusional iron-overload.
Zeitfenster: Once at baseline compared to 3 years after participant enrollment
|
Decline of iron concentration in the liver, heart, pancreas, kidneys, and spleen of non-sickle cell patients with transfusional iron-overload.
|
Once at baseline compared to 3 years after participant enrollment
|
Explore the relationship between Non-Transferrin Bound Iron (NTBI), hepcidin, organ function, and iron increase, maintenance, and decline in the liver, heart, pancreas, kidneys, and spleen of patients with transfusional iron overload.
Zeitfenster: Once at baseline compared to 3 years after participant enrollment
|
Once at baseline compared to 3 years after participant enrollment
|
Mitarbeiter und Ermittler
Publikationen und hilfreiche Links
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- GENIOS
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .
Klinische Studien zur Sichelzellenanämie
-
Bing HanAbgeschlossenPure Red Cell Aplasia, erworbenChina
-
Johnson & Johnson Pharmaceutical Research & Development...Abgeschlossen
-
Peking Union Medical College HospitalUnbekannt
-
Johnson & Johnson Pharmaceutical Research & Development...AbgeschlossenReine Erythrozyten-AplasieVereinigtes Königreich, Schweden, Südafrika, Brasilien, Kanada, Deutschland, Norwegen, Thailand
-
National Cancer Institute (NCI)AbgeschlossenAIDS-bedingtes peripheres/systemisches Lymphom | AIDS-assoziiertes diffuses großzelliges Lymphom | AIDS-bedingtes diffuses gemischtzelliges Lymphom | AIDS-bedingtes kleines Noncleaved-Cell-LymphomVereinigte Staaten
-
Beijing Friendship HospitalBeijing Boren HospitalNoch keine RekrutierungLangerhans-Zell-HistiozytoseChina
-
Fundació Institut de Recerca de l'Hospital de la...Rekrutierung
-
GlaxoSmithKlineAbgeschlossenLangerhans-Zell-HistiozytoseVereinigte Staaten
-
Baylor College of MedicineThe Methodist Hospital Research InstituteAbgeschlossenHistiozytose, Langerhans-CellVereinigte Staaten