NCT01137656

Brief Summary

The purpose of this study is to explore the impact of aged blood on endothelial function by measuring forearm blood flow during intra-arterial acetylcholine infusion in normal healthy human volunteers after infusion of autologous blood stored for 5-10 days or 35-42 days. Our hypothesis is that 1) the vasodilatory response to the infusion of acetylcholine will be reduced in the 35-42 day group compared with the 5-10 day group, because of scavenging of the NO released from the endothelium by the hemolytic process in the aged blood, 2) that the infusion of aged stored blood will produce vasoconstriction, measured by reduced forearm blood flow during infusion of the 35-42 day compared with the 5-10 day old blood, and that 3) there will be increases in venous levels of cell free plasma hemoglobin, red cell microparticles, red cell membrane damage, arginase levels and activity, decreased arginine levels, markers of oxidative stress (carbamylated proteins and nitrated tyrosine residues), and increases in plasma in vitro NO consumption during the infusion of 35-42 day old compared to 5-10 day old blood.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
53

participants targeted

Target at P50-P75 for phase_1 healthy

Timeline
Completed

Started Apr 2010

Longer than P75 for phase_1 healthy

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

April 1, 2010

Completed
2 months until next milestone

First Submitted

Initial submission to the registry

June 3, 2010

Completed
1 day until next milestone

First Posted

Study publicly available on registry

June 4, 2010

Completed
3.2 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

August 1, 2013

Completed
1 month until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2013

Completed
Last Updated

April 14, 2015

Status Verified

April 1, 2015

Enrollment Period

3.3 years

First QC Date

June 3, 2010

Last Update Submit

April 10, 2015

Conditions

Keywords

Blood storageBlood transfusionAged bloodBlood ForearmStorage lesion in blood

Outcome Measures

Primary Outcomes (1)

  • Blood flow response to Acetylcholine.

    The primary endpoint will be a comparison of the blood flow responses to the acetylcholine after infusion of 5-10 day old blood compared with the responses after infusion of 35-42 day old blood, each controlled for the opposite arm.

    5-10 days vs 35-42 days

Secondary Outcomes (2)

  • Change in blood flow response to fresh blood (5-10 days) in comparison to aged blood.

    5-10 days vs 35-42 days

  • Comparison in the levels of various biomarkers of aged blood will be examined in venous blood collected from the antecubital vein during the infusion of 5-10 days versus35-42 days old autologous blood.

    5-10 days versus 35-42 days

Study Arms (1)

Acetylcholine and Blood

OTHER

This is single arm study. Acetylcholine and blood is infused in brachial artery of non-dominant arm. Blood flow

Drug: Acetylcholine and Blood

Interventions

The Acetylcholine solution will be infused intra-arterially at the dosage of 7.5 ug/min for 3 minutes, then 15ug/min for 3 minutes, then 30 ug/min for 3 minutes, after the infusion of normal saline. It will then be infused at 7.5ug/min for 3 minutes, followed by 15ug/min for 3 minutes, followed by 30 ug/min for 3 minutes after the infusion of autologous blood. This will be performed at 5-10 days and 35-42 days of blood storage time.

Also known as: Miochol-e, Miochol
Acetylcholine and Blood

Eligibility Criteria

Age18 Years - 50 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Male or female and 18 to 50 years of age.
  • Able to read and comprehend the English language

You may not qualify if:

  • Less than 18 or greater than 50 years of age.
  • Female \< 110 lbs or 50 kg
  • Male \< 110 lbs or 50 kg
  • Hemoglobin \<12.5g/dl
  • Past medical history or symptoms of blood dyscrasia, diabetes mellitus, hyperlipidemia, obstructive sleep apnea, hypertension, significant cardiac disease and / or known peripheral arterial disease.
  • History of cigarette smoking within the last month
  • Serum creatinine \>1.0 mg/dL
  • Cognitively impaired subjects, or institutionalized persons and subjects unable or unwilling to complete written informed consent (no proxy consent will be obtained)
  • Subjects with a history of blood donation within the last 60 days.
  • Subjects who have performed other medical studies involving drug delivery in the last 30 days.
  • Subjects with an oxygen saturation value \< 92%.
  • Any STATIN drug (Fluvastatin, Lovastatin, Pravastatin, Simvastatin, Rosuvastatin) currently or in the 4 weeks prior to the screening day
  • Any medication for the treatment of diabetes including oral hypoglycemics or insulin
  • lab tests indicating blood dyscrasia, diabetes, hypertension or hypercholesterolemia.Females of childbearing potential who are pregnant or unwilling to undergo pregnancy testing; females with positive pregnancy testing on screening day will be excluded

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Pittsburgh Medical Center

Pittsburgh, Pennsylvania, 15213, United States

Location

Related Publications (5)

  • Greenwalt TJ, Bryan DJ, Dumaswala UJ. Erythrocyte membrane vesiculation and changes in membrane composition during storage in citrate-phosphate-dextrose-adenine-1. Vox Sang. 1984;47(4):261-70. doi: 10.1111/j.1423-0410.1984.tb01596.x.

    PMID: 6485302BACKGROUND
  • Rumsby MG, Trotter J, Allan D, Michell RH. Recovery of membrane micro-vesicles from human erythrocytes stored for transfusion: a mechanism for the erythrocyte discocyte-to-spherocyte shape transformation. Biochem Soc Trans. 1977;5(1):126-8. doi: 10.1042/bst0050126. No abstract available.

    PMID: 892138BACKGROUND
  • Dern RJ, Brewer GJ, Wiorkowski JJ. Studies on the preservation of human blood. II. The relationship of erythrocyte adenosine triphosphate levels and other in vitro measures to red cell storageability. J Lab Clin Med. 1967 Jun;69(6):968-78. No abstract available.

    PMID: 6025497BACKGROUND
  • Berezina TL, Zaets SB, Morgan C, Spillert CR, Kamiyama M, Spolarics Z, Deitch EA, Machiedo GW. Influence of storage on red blood cell rheological properties. J Surg Res. 2002 Jan;102(1):6-12. doi: 10.1006/jsre.2001.6306.

    PMID: 11792145BACKGROUND
  • Risbano MG, Kanias T, Triulzi D, Donadee C, Barge S, Badlam J, Jain S, Belanger AM, Kim-Shapiro DB, Gladwin MT. Effects of Aged Stored Autologous Red Blood Cells on Human Endothelial Function. Am J Respir Crit Care Med. 2015 Nov 15;192(10):1223-33. doi: 10.1164/rccm.201501-0145OC.

MeSH Terms

Interventions

AcetylcholineBlood Specimen Collection

Intervention Hierarchy (Ancestors)

Biogenic AminesAminesOrganic ChemicalsSpecimen HandlingClinical Laboratory TechniquesDiagnostic Techniques and ProceduresDiagnosisPuncturesSurgical Procedures, OperativeInvestigative Techniques

Study Officials

  • Mark T Gladwin, M.D

    University of Pittsburgh and University of Pittsburgh medical center

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
phase 1
Allocation
NA
Masking
NONE
Purpose
BASIC SCIENCE
Intervention Model
SINGLE GROUP
Sponsor Type
OTHER
Responsible Party
SPONSOR INVESTIGATOR
PI Title
Division Chief, Pulmonary, Allergy and Critical Care Medicine University of Pittsburgh Medical Center / Director, Vascular Medicine Institute of the University of Pittsburgh

Study Record Dates

First Submitted

June 3, 2010

First Posted

June 4, 2010

Study Start

April 1, 2010

Primary Completion

August 1, 2013

Study Completion

September 1, 2013

Last Updated

April 14, 2015

Record last verified: 2015-04

Locations