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Adenosylmethionine Metabolism in Human Inflammation

6. August 2015 aktualisiert von: En-Pei Isabel Chiang, National Chung Hsing University

Translational Study on the Regulation of Adenosylmethionine Synthesis During Chronic Inflammation

The investigators propose to conduct a translational study on the regulation of S-adenosylmethionine synthesis and cellular methylation reactions during chronic inflammation. Development of in vitro cell models may reveal the regulatory mechanisms by which specific inflammatory mediators cause metabolic changes and alter DNA methylation status. Metabolic and pharmacological studies in the in vivo models will enable us to better understand the regulation of inter-organ homeostasis of S-adenosyl methionine and help identify tissue specific biomarkers for methylation and epigenetic modifications in different stage of chronic inflammation. The clinical study in human subjects will help distinguish the impacts of autoimmune rheumatic disease, degenerated joint disease, or specific medication use on significant clinical and biochemical markers in folate and vitamin B6 metabolic pathways.The Investigators hope the present study can identify specific clinical markers for potential epigenetic changes in patients suffering from chronic inflammation, which will contribute to better clinical management of these diseases in humans.

Studienübersicht

Status

Unbekannt

Bedingungen

Detaillierte Beschreibung

The significance of epigenetic alterations in autoimmune rheumatic diseases and degenerated joint diseases has drawn great attention among clinicians and researchers. Aberrant methylation status has been demonstrated in human chronic inflammation yet more efforts have focused on global and sequence-specific hypomethylation and overexpression of specific genes. Few studies investigated the regulation of S-adenosylmethionine homeostasis and regulation during inflammation. At present the relevance and regulation of the complex epigenetic profiles and their modifications among different tissues and organs during inflammation remain largely unknown.

Studientyp

Beobachtungs

Einschreibung (Voraussichtlich)

250

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 80 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Wahrscheinlichkeitsstichprobe

Studienpopulation

patients with arthritis or healthy adults

Beschreibung

Inclusion Criteria:

  • > 18 years

Exclusion Criteria:

  • pregnancy,
  • anemia (hemoglobin 10 mg/dL or lower),
  • thrombocytopenia (platelet count below 50,000 cells/μL),
  • abnormal serum hepatic transaminase (aspartate aminotransferase or alanine aminotransferase above 50 IU/L),
  • diabetes or cancer

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Kohorten und Interventionen

Gruppe / Kohorte
Arthritis
subjects with arthritis
Health control subjects
Health control

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
s-adenosylmethionine
Zeitfenster: Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
homocysteine
Zeitfenster: Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
folate
Zeitfenster: Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
vitamin B6
Zeitfenster: Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Some participants were followed for 4wks if medication was changed by the doctor

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
blood amino acid profile (serine, glycine, methionine,cysteine, cystathionine, dimethylglycine)
Zeitfenster: Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
gene expression of target enzymes in PBMCs
Zeitfenster: Blood were collected at admission.Blood were dawn again 1mo later if his medication was changed by the doctor
blood samples were collected and stored for later analyses
Blood were collected at admission.Blood were dawn again 1mo later if his medication was changed by the doctor
enzyme activities of S-adenosylmethionine synthase in RBC
Zeitfenster: Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
vitamin B6 metabolic enzyme in RBC
Zeitfenster: Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
blood samples were collected and stored for later analyses of above metabolites
Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
polymorphisms in one carbon metabolism enzymes in PBMCs
Zeitfenster: Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor
blood samples were collected and stored for later analyses
Blood were collected at admission. Blood were dawn again 1mo later if his medication was changed by the doctor

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

National Chung Hsing University

Mitarbeiter

National Science Council, Taiwan
Ministry of Science and Technology, Taiwan

Ermittler

  • Hauptermittler: En-Pei I Chiang, PhD, Department of Food Science and Biotechnology, National Chung Hsing University

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn

1. Januar 2011

Primärer Abschluss (Tatsächlich)

1. Juli 2014

Studienabschluss (Voraussichtlich)

1. August 2015

Studienanmeldedaten

Zuerst eingereicht

28. Juli 2015

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

6. August 2015

Zuerst gepostet (Schätzen)

11. August 2015

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Schätzen)

11. August 2015

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

6. August 2015

Zuletzt verifiziert

1. August 2015

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • SF11093

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