Coronary Artery DiseaseNCT02771808
Haptoglobin Polymorphism as a Determinant of Adverse Outcome After Cardiac Surgery in Diabetic Patients
An observational study of Coronary Artery Disease, run by University of Virginia at 1 site in United States.
Trial summary
Specific aim 1a will test the hypothesis that diabetic patients with 2-2 haptoglobin genotype have higher indices of postoperative myocardial injury (creatine kinase MB isoenzyme , Troponin I ) and renal injury (as indicated by elevated creatinine, cytostatin C and glomerular filtration rate). Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Coronary Artery Disease
- What is being tested?
- biomarker samples
- How many people
- 83 participants
- Where
- 1 siteUnited States
- Study dates
- Sep 2010to May 2015
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adult diabetic patients scheduled for an elective cardiac surgery on pump at UVA
Who may be able to join
- 18 years of age and older
- Scheduled for an elective cardiac surgery on pump
- Diabetic -type I or type II
- Informed consent
Who cannot join
- Patients with chronic hemolytic disorders;
- Patients with hemoglobinopathies
- Enrollment in another interventional clinical trial
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Virginia Health System
Charlottesville, Virginia, 22908
About this study
Specific aim 1a will test the hypothesis that diabetic patients with 2-2 haptoglobin genotype have higher indices of postoperative myocardial injury (creatine kinase MB isoenzyme , Troponin I ) and renal injury (as indicated by elevated creatinine, cytostatin C and glomerular filtration rate). Of note, significantly elevated levels (>5 times the upper normal limit) of creatine kinase MB isoenzyme and troponins postoperatively have been associated with postoperative myocardial ischemia/infarction and are a predictor of short-term and long-term mortality after cardiac surgery.
Specific aim 1b will evaluate preoperative and postoperative indices of oxidative stress (such as isoprostane f2 alpha and malondialdehyde) and will evaluate whether patients with type 2-2 haptoglobin express increased oxidative stress. The investigators will also try to correlate whether patients with increased oxidative stress are those with elevated indices of myocardial and/or renal injury Specific aim 1c will try to evaluate whether patients with type 2-2 haptoglobin also have increased levels of inflammatory indices (C-reactive protein,[interleukin] IL-1, IL-2, IL-6, TNF[tumor necrosis factor]) and try to correlate the findings with postoperative myocardial and or renal injury.
The incidence of atrial fibrillation after coronary artery bypass graft ranges from 19% to 27%. The investigators will also look at any correlation of the type 2-2 haptoglobin and the incidence of post-operative atrial fibrillation.
Read the detailed description
Diabetes mellitus is a major risk factor for postoperative morbidity and mortality after cardiac surgery, mainly because of accelerated atherosclerosis and target-organ injury that predispose these patients to increased incidence of postoperative morbidity (such as but not limited to, postoperative adverse cardiac events, renal injury or stroke) and mortality.
Over the past several years haptoglobin has been identified as a risk factor that predicts the development of cardiovascular complications in diabetics. There are 3 major haplotypes of haptoglobin: 1-1; 1-2 and 2-2. Several studies have demonstrated that diabetic individuals with the 2-2 genotype have up to 5 fold increased risk to develop cardiovascular complications as compared to diabetic patients with a non-2-2 haptoglobin genotype. There is no data in the literature that evaluated whether the haptoglobin 2-2 genotype is a risk factor for increased postoperative morbidity and/or mortality after cardiac surgery in patients with DM.
Therefore, the aims of the study are to evaluate whether diabetic patients with the 2-2 genotype are at increased risk for postoperative morbidity and/or mortality after cardiac surgery.
Preliminary studies in diabetic patients demonstrated that those with haptoglobin 2-2 genotype are at increased risk for cardiovascular complications of diabetes. Moreover, these patients were found to have increased in-hospital mortality after acute MI compared to diabetic individuals that do not have the 2-2 genotype, and they also suffer from increased incidence of post catheterization stent thrombosis compared to diabetics that do not have the 2-2 genotype
- Conditions
- Coronary Artery Disease
- Being tested
- biomarker samples
- Keywords
- CABG
- Medical subject headings
- Coronary Artery Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
biomarker samplesOther
Also called haptoglobin
biomarker samples for haptoglobin genotype (RT-PCR) and phenotype (hemoglobin electrophoresis) general markers for oxidative stress (isoprostane f2 alpha, malondialdehyde) markers of inflammation (CRP, IL-1, 2, 6, 10 and TNF) markers of cardiac injury (CPK, troponins and BNP) markers of kidney injury (cystatin C, creatinine, GFR)
| Study group | Role | What they receive |
|---|---|---|
| diabetic patients | obtain biomarker samples from diabetic patients and examine for 1-1 \& 1-2 \& 2-2 haptoglobin genotype Receives: Other: biomarker samples |
What is being measured
The primary outcome is the main question the study is designed to answer.
number of participants with myocardial injury
number of participants with general markers for myocardial injury
Measured: 24 hours post CPB
Secondary outcomes (2)
number of participants with renal injury
number of participants with markers of kidney injury (cystatin C, creatinine, GFR)
Measured: 24 hrs post CPB
number of participants with incidence of new onset atrial fibrillation
incidence of new onset atrial fibrillation will be recorded
Measured: day 15
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 May 2016 (estimated)
- Study startSep 2010
- Primary completionMay 2015
- Study completionMay 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (23)Papers the sponsor has linked to this study.
- Other trials for Coronary Artery DiseaseStudies of the same condition, open and under way.
- More trials run by University of VirginiaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 83 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Virginia
- Sponsor type
- University, hospital or other
- Collaborators
- International Anesthesia Research Society (IARS)
- Responsible party
- Principal investigator, Jacob Raphael, University of Virginia
- Investigators
- Jacob Raphael, MD, Principal investigator, UVA Anesthesiology
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02771808
- Sponsor's protocol ID
- 14691
- Status last verified
- May 2016
- First submitted
- 17 Sep 2010
- Last updated
- 13 May 2016
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- No
Publications
Moreno PR, Fuster V. New aspects in the pathogenesis of diabetic atherothrombosis. J Am Coll Cardiol. 2004 Dec 21;44(12):2293-300. doi: 10.1016/j.jacc.2004.07.060.
PubMed 15607389Donahoe SM, Stewart GC, McCabe CH, Mohanavelu S, Murphy SA, Cannon CP, Antman EM. Diabetes and mortality following acute coronary syndromes. JAMA. 2007 Aug 15;298(7):765-75. doi: 10.1001/jama.298.7.765.
PubMed 17699010Bucerius J, Gummert JF, Walther T, Doll N, Falk V, Onnasch JF, Barten MJ, Mohr FW. Impact of diabetes mellitus on cardiac surgery outcome. Thorac Cardiovasc Surg. 2003 Feb;51(1):11-6. doi: 10.1055/s-2003-37280.
PubMed 12587082Carson JL, Scholz PM, Chen AY, Peterson ED, Gold J, Schneider SH. Diabetes mellitus increases short-term mortality and morbidity in patients undergoing coronary artery bypass graft surgery. J Am Coll Cardiol. 2002 Aug 7;40(3):418-23. doi: 10.1016/s0735-1097(02)01969-1.
PubMed 12142105Thourani VH, Weintraub WS, Stein B, Gebhart SS, Craver JM, Jones EL, Guyton RA. Influence of diabetes mellitus on early and late outcome after coronary artery bypass grafting. Ann Thorac Surg. 1999 Apr;67(4):1045-52. doi: 10.1016/s0003-4975(99)00143-5.
PubMed 10320249Levy AP, Hochberg I, Jablonski K, Resnick HE, Lee ET, Best L, Howard BV; Strong Heart Study. Haptoglobin phenotype is an independent risk factor for cardiovascular disease in individuals with diabetes: The Strong Heart Study. J Am Coll Cardiol. 2002 Dec 4;40(11):1984-90. doi: 10.1016/s0735-1097(02)02534-2.
PubMed 12475459Roguin A, Koch W, Kastrati A, Aronson D, Schomig A, Levy AP. Haptoglobin genotype is predictive of major adverse cardiac events in the 1-year period after percutaneous transluminal coronary angioplasty in individuals with diabetes. Diabetes Care. 2003 Sep;26(9):2628-31. doi: 10.2337/diacare.26.9.2628.
PubMed 12941730Suleiman M, Aronson D, Asleh R, Kapeliovich MR, Roguin A, Meisel SR, Shochat M, Sulieman A, Reisner SA, Markiewicz W, Hammerman H, Lotan R, Levy NS, Levy AP. Haptoglobin polymorphism predicts 30-day mortality and heart failure in patients with diabetes and acute myocardial infarction. Diabetes. 2005 Sep;54(9):2802-6. doi: 10.2337/diabetes.54.9.2802.
PubMed 16123372Asleh R, Guetta J, Kalet-Litman S, Miller-Lotan R, Levy AP. Haptoglobin genotype- and diabetes-dependent differences in iron-mediated oxidative stress in vitro and in vivo. Circ Res. 2005 Mar 4;96(4):435-41. doi: 10.1161/01.RES.0000156653.05853.b9. Epub 2005 Jan 20.
PubMed 15662028Guetta J, Strauss M, Levy NS, Fahoum L, Levy AP. Haptoglobin genotype modulates the balance of Th1/Th2 cytokines produced by macrophages exposed to free hemoglobin. Atherosclerosis. 2007 Mar;191(1):48-53. doi: 10.1016/j.atherosclerosis.2006.04.032. Epub 2006 Jul 3.
PubMed 16820150Greenson N, Macoviak J, Krishnaswamy P, Morrisey R, James C, Clopton P, Fitzgerald R, Maisel AS. Usefulness of cardiac troponin I in patients undergoing open heart surgery. Am Heart J. 2001 Mar;141(3):447-55. doi: 10.1067/mhj.2001.113071.
PubMed 11231444Muehlschlegel JD, Perry TE, Liu KY, Nascimben L, Fox AA, Collard CD, Avery EG, Aranki SF, D'Ambra MN, Shernan SK, Body SC; CABG Genomics Investigators. Troponin is superior to electrocardiogram and creatinine kinase MB for predicting clinically significant myocardial injury after coronary artery bypass grafting. Eur Heart J. 2009 Jul;30(13):1574-83. doi: 10.1093/eurheartj/ehp134. Epub 2009 Apr 30.
PubMed 19406870Paparella D, Cappabianca G, Visicchio G, Galeone A, Marzovillo A, Gallo N, Memmola C, Schinosa Lde L. Cardiac troponin I release after coronary artery bypass grafting operation: effects on operative and midterm survival. Ann Thorac Surg. 2005 Nov;80(5):1758-64. doi: 10.1016/j.athoracsur.2005.04.040.
PubMed 16242452Ramsay J, Shernan S, Fitch J, Finnegan P, Todaro T, Filloon T, Nussmeier NA. Increased creatine kinase MB level predicts postoperative mortality after cardiac surgery independent of new Q waves. J Thorac Cardiovasc Surg. 2005 Feb;129(2):300-6. doi: 10.1016/j.jtcvs.2004.06.005.
PubMed 15678039Adabag AS, Rector T, Mithani S, Harmala J, Ward HB, Kelly RF, Nguyen JT, McFalls EO, Bloomfield HE. Prognostic significance of elevated cardiac troponin I after heart surgery. Ann Thorac Surg. 2007 May;83(5):1744-50. doi: 10.1016/j.athoracsur.2006.12.049.
PubMed 17462392
Study at a glance
From the registry record, last updated by the sponsor on 13 May 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Haptoglobin Polymorphism as a Determinant of Adverse Outcome After Cardiac Surgery in Diabetic Patients
- ClinicalTrials.gov ID
- NCT02771808
- Acronym / sponsor ID
- 14691
- Conditions
- Coronary Artery Disease
- Keywords
- CABG
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 83 participants (actual)
- Lead sponsor
- University of VirginiaUniversity, hospital or other
- Collaborators
- International Anesthesia Research Society (IARS)
- Study start
- Sep 2010
- Primary completion
- May 2015 (actual)
- Study completion
- May 2015 (actual)
- First posted
- 13 May 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Specific aim 1a will test the hypothesis that diabetic patients with 2-2 haptoglobin genotype have higher indices of postoperative myocardial injury (creatine kinase MB isoenzyme , Troponin I ) and renal injury (as indicated by elevated creatinine, cytostatin C and glomerular filtration rate). Of note, significantly elevated levels (>5 times the upper normal limit) of creatine kinase MB isoenzyme and troponins postoperatively have been associated with postoperative myocardial ischemia/infarction and are a predictor of short-term and long-term mortality after cardiac surgery.
Specific aim 1b will evaluate preoperative and postoperative indices of oxidative stress (such as isoprostane f2 alpha and malondialdehyde) and will evaluate whether patients with type 2-2 haptoglobin express increased oxidative stress. The investigators will also try to correlate whether patients with increased oxidative stress are those with elevated indices of myocardial and/or renal injury Specific aim 1c will try to evaluate whether patients with type 2-2 haptoglobin also have increased levels of inflammatory indices (C-reactive protein,[interleukin] IL-1, IL-2, IL-6, TNF[tumor necrosis factor]) and try to correlate the findings with postoperative myocardial and or renal injury.
The incidence of atrial fibrillation after coronary artery bypass graft ranges from 19% to 27%. The investigators will also look at any correlation of the type 2-2 haptoglobin and the incidence of post-operative atrial fibrillation.
Detailed description
Diabetes mellitus is a major risk factor for postoperative morbidity and mortality after cardiac surgery, mainly because of accelerated atherosclerosis and target-organ injury that predispose these patients to increased incidence of postoperative morbidity (such as but not limited to, postoperative adverse cardiac events, renal injury or stroke) and mortality.
Over the past several years haptoglobin has been identified as a risk factor that predicts the development of cardiovascular complications in diabetics. There are 3 major haplotypes of haptoglobin: 1-1; 1-2 and 2-2. Several studies have demonstrated that diabetic individuals with the 2-2 genotype have up to 5 fold increased risk to develop cardiovascular complications as compared to diabetic patients with a non-2-2 haptoglobin genotype. There is no data in the literature that evaluated whether the haptoglobin 2-2 genotype is a risk factor for increased postoperative morbidity and/or mortality after cardiac surgery in patients with DM.
Therefore, the aims of the study are to evaluate whether diabetic patients with the 2-2 genotype are at increased risk for postoperative morbidity and/or mortality after cardiac surgery.
Preliminary studies in diabetic patients demonstrated that those with haptoglobin 2-2 genotype are at increased risk for cardiovascular complications of diabetes. Moreover, these patients were found to have increased in-hospital mortality after acute MI compared to diabetic individuals that do not have the 2-2 genotype, and they also suffer from increased incidence of post catheterization stent thrombosis compared to diabetics that do not have the 2-2 genotype
Study design
- Observational model
- Case only
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| diabetic patients | – | Other: biomarker samplesobtain biomarker samples from diabetic patients and examine for 1-1 \& 1-2 \& 2-2 haptoglobin genotype |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adult diabetic patients scheduled for an elective cardiac surgery on pump at UVA
Key inclusion criteria (4 listed)
- 18 years of age and older
- Scheduled for an elective cardiac surgery on pump
- Diabetic -type I or type II
- Informed consent
Key exclusion criteria (3 listed)
- Patients with chronic hemolytic disorders;
- Patients with hemoglobinopathies
- Enrollment in another interventional clinical trial
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| biomarker samplesAlso: haptoglobinbiomarker samples for haptoglobin genotype (RT-PCR) and phenotype (hemoglobin electrophoresis) general markers for oxidative stress (isoprostane f2 alpha, malondialdehyde) markers of inflammation (CRP, IL-1, 2, 6, 10 and TNF) markers of cardiac injury (CPK, troponins and BNP) markers of kidney injury (cystatin C, creatinine, GFR) | Other | diabetic patients |
Primary outcome
number of participants with myocardial injury
Time frame: 24 hours post CPB
number of participants with general markers for myocardial injury
2 secondary outcomes
number of participants with renal injury
Time frame: 24 hrs post CPB
number of participants with incidence of new onset atrial fibrillation
Time frame: day 15
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 May 2016.
- Background: PubMed 15607389Moreno PR, Fuster V. New aspects in the pathogenesis of diabetic atherothrombosis. J Am Coll Cardiol. 2004 Dec 21;44(12):2293-300. doi: 10.1016/j.jacc.2004.07.060.
- Background: PubMed 17699010Donahoe SM, Stewart GC, McCabe CH, Mohanavelu S, Murphy SA, Cannon CP, Antman EM. Diabetes and mortality following acute coronary syndromes. JAMA. 2007 Aug 15;298(7):765-75. doi: 10.1001/jama.298.7.765.
- Background: PubMed 12587082Bucerius J, Gummert JF, Walther T, Doll N, Falk V, Onnasch JF, Barten MJ, Mohr FW. Impact of diabetes mellitus on cardiac surgery outcome. Thorac Cardiovasc Surg. 2003 Feb;51(1):11-6. doi: 10.1055/s-2003-37280.
- Background: PubMed 12142105Carson JL, Scholz PM, Chen AY, Peterson ED, Gold J, Schneider SH. Diabetes mellitus increases short-term mortality and morbidity in patients undergoing coronary artery bypass graft surgery. J Am Coll Cardiol. 2002 Aug 7;40(3):418-23. doi: 10.1016/s0735-1097(02)01969-1.
- Background: PubMed 10320249Thourani VH, Weintraub WS, Stein B, Gebhart SS, Craver JM, Jones EL, Guyton RA. Influence of diabetes mellitus on early and late outcome after coronary artery bypass grafting. Ann Thorac Surg. 1999 Apr;67(4):1045-52. doi: 10.1016/s0003-4975(99)00143-5.
- Background: PubMed 12475459Levy AP, Hochberg I, Jablonski K, Resnick HE, Lee ET, Best L, Howard BV; Strong Heart Study. Haptoglobin phenotype is an independent risk factor for cardiovascular disease in individuals with diabetes: The Strong Heart Study. J Am Coll Cardiol. 2002 Dec 4;40(11):1984-90. doi: 10.1016/s0735-1097(02)02534-2.
- Background: PubMed 12941730Roguin A, Koch W, Kastrati A, Aronson D, Schomig A, Levy AP. Haptoglobin genotype is predictive of major adverse cardiac events in the 1-year period after percutaneous transluminal coronary angioplasty in individuals with diabetes. Diabetes Care. 2003 Sep;26(9):2628-31. doi: 10.2337/diacare.26.9.2628.
- Background: PubMed 16123372Suleiman M, Aronson D, Asleh R, Kapeliovich MR, Roguin A, Meisel SR, Shochat M, Sulieman A, Reisner SA, Markiewicz W, Hammerman H, Lotan R, Levy NS, Levy AP. Haptoglobin polymorphism predicts 30-day mortality and heart failure in patients with diabetes and acute myocardial infarction. Diabetes. 2005 Sep;54(9):2802-6. doi: 10.2337/diabetes.54.9.2802.
- Background: PubMed 15662028Asleh R, Guetta J, Kalet-Litman S, Miller-Lotan R, Levy AP. Haptoglobin genotype- and diabetes-dependent differences in iron-mediated oxidative stress in vitro and in vivo. Circ Res. 2005 Mar 4;96(4):435-41. doi: 10.1161/01.RES.0000156653.05853.b9. Epub 2005 Jan 20.
- Background: PubMed 16820150Guetta J, Strauss M, Levy NS, Fahoum L, Levy AP. Haptoglobin genotype modulates the balance of Th1/Th2 cytokines produced by macrophages exposed to free hemoglobin. Atherosclerosis. 2007 Mar;191(1):48-53. doi: 10.1016/j.atherosclerosis.2006.04.032. Epub 2006 Jul 3.
- Background: PubMed 11231444Greenson N, Macoviak J, Krishnaswamy P, Morrisey R, James C, Clopton P, Fitzgerald R, Maisel AS. Usefulness of cardiac troponin I in patients undergoing open heart surgery. Am Heart J. 2001 Mar;141(3):447-55. doi: 10.1067/mhj.2001.113071.
- Background: PubMed 19406870Muehlschlegel JD, Perry TE, Liu KY, Nascimben L, Fox AA, Collard CD, Avery EG, Aranki SF, D'Ambra MN, Shernan SK, Body SC; CABG Genomics Investigators. Troponin is superior to electrocardiogram and creatinine kinase MB for predicting clinically significant myocardial injury after coronary artery bypass grafting. Eur Heart J. 2009 Jul;30(13):1574-83. doi: 10.1093/eurheartj/ehp134. Epub 2009 Apr 30.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Jacob Raphael, MD principal investigator
UVA Anesthesiology
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Coronary Artery Disease, run by University of Virginia at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 13 May 2016. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
number of participants with myocardial injury (time frame: 24 hours post CPB). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02771808, which also lists 23 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 May 2016; AzTrials last refreshed its copy on 7 Nov 2026.