Effects of Nutritional Supplementation (Product 4808) on Acute Skeletal Muscle Protein Synthesis in Cancer Patients
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Muscle protein is generally diminished in cancer patients, with an effect on outcome. Research has shown that recurrence in treated patients is directly related to the extent of muscle loss. The effects of nutritional supplements; however, is still controversial. Anorexia due to metabolic changes in cancer patients can lead to reduced food intake and supplementation orally has often failed to show weight gain in these patients. These observations have led to the conclusion that even though food intake should be increased in order to gain lean body mass, this is difficult to achieve unless specific metabolic abnormalities are targeted.
This study is a comparison of two supplements on muscle protein synthesis. Approximately 40 patients with radiographic evidence of cancer, ages 40 and older will be enrolled.
Participation will require a screening procedure, including a history of medical problems and a physical exam, which may include blood testing for HIV or hepatitis as well as possibly for various basic diagnostic parameters. There may also be a urine-based drug screen or pregnancy test (if female). Participants should be in general good health and not have a variety of exclusion criteria.
There will be three days of diet stabilization, during which all meals will come from the Reynolds Institute of Aging. If subjects cannot comply with the diet, dietary recording will be substituted. Following these three days, there will be one day of main study activities. There will be catheters placed in both arms and blood samples will be taken from one of these. Stable amino acid isotopes will be infused into the bloodstream through the other. There will be three muscle biopsies taken from the thigh muscle throughout the day. Two doses of a nutritional supplements will be consumed 20 minutes apart during the main study day.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Arkansas
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Little Rock, Arkansas, Forenede Stater, 72205
- University of Arkansas for Medical Sciences
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- radiographic evidence of Cancer
- Ages 40 and older
- Ability to sign Informed Consent
Exclusion Criteria:
- Patient received anti-cancer therapy or surgery less than 4 weeks prior to the experiment
- Body weight loss of more than 10% in past three months
- Body Mass Index less than 20kg/m2 or greater than 30 kg/m2
- Any documented autoimmune disease
- Peripheral vascular disease
- Hgb less than 9.0g/dL
- PT with INR greater than 1.5
- PTT greater than 40 seconds
- Platelet count less than 100,000
- Uncontrolled hypertension
- Currently using insulin to control high blood sugar
- Untreated metabolic diseases including liver or renal disease
- Currently in muscle strengthening program
- Use of supplements enriched with branched-chain amino acids
- History of hypo- or hyper-coagulation disorders, including patients taking Coumadin or history of deep venous thrombosis or pulmonary embolism at any point in their lifetime
- Currently taking aspirin and cannot stop for 7 days
- Presence of acute illness or metabolically unstable chronic illness
- Unstable heart disease requiring therapy or recent myocardial infarction (less than 1 year)
- Current alcohol or drug abuse
- Pregnancy or lactation (pre-menopausal women)
- Allergy/intolerance to any of the ingredients of the study products
- Any other condition deemed by the Principal Investigator and the study physician as exclusion or that interferes with proper study conduct or safety of the patient
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Dobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
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Aktiv komparator: 1
these subjects will get a standard protein supplement "milkshake" during thei study.
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Subjects will eat prepared meals for 3 days prior to their study; or they will document their dietary intake over this period.
400 ml of commercially-available nutritional supplement.
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Eksperimentel: 2
these subjects will receive an enhanced protein supplement "milkshake" during their study.
Product 4808.
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Subjects will eat prepared meals for 3 days prior to their study; or they will document their dietary intake over this period.
400 ml Forticare, to which has been added extra protein and the amino acid leucine.
Andre navne:
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Tidsramme |
|---|---|
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Muscle fractional synthetic rate of growth.
Tidsramme: one day.
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one day.
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Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: Robert Wolfe, PhD, University of Arkansas
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
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