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Adenosylmethionine Metabolism in Human Inflammation

6. august 2015 opdateret af: 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.

Studieoversigt

Status

Ukendt

Betingelser

Detaljeret beskrivelse

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.

Undersøgelsestype

Observationel

Tilmelding (Forventet)

250

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 80 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

patients with arthritis or healthy adults

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Kohorter og interventioner

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

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
s-adenosylmethionine
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
blood amino acid profile (serine, glycine, methionine,cysteine, cystathionine, dimethylglycine)
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

National Chung Hsing University

Samarbejdspartnere

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

Efterforskere

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

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. januar 2011

Primær færdiggørelse (Faktiske)

1. juli 2014

Studieafslutning (Forventet)

1. august 2015

Datoer for studieregistrering

Først indsendt

28. juli 2015

Først indsendt, der opfyldte QC-kriterier

6. august 2015

Først opslået (Skøn)

11. august 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

11. august 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

6. august 2015

Sidst verificeret

1. august 2015

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • SF11093

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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