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Coronary Artery Bypass Graft SurgeryPhase 1NCT03123107

Vitamin C in Cardiac Surgery Patients

A Phase 1 study testing Ascorbic Acid in people with Coronary Artery Bypass Graft Surgery, run by Geisinger Clinic at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Postoperative atrial fibrillation (POAF) is a common complication following cardiac surgery that increases the incidence of stroke, kidney injury and death. Vitamin C has been shown to decrease the incidence of POAF follow cardiac surgery, but the optimal dose has not been identified. Read more about this study

Who is it for?
Ages 21 to 79 years
Conditions the study is for
Coronary Artery Bypass Graft Surgery
What is being tested?
Ascorbic Acid
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
6 participants
Where
1 siteUnited States
Study dates
6 Jul 2017to 31 May 2019
Phase
Phase 1
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 21 to 79 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients 21 to 79 years of age admitted to Geisinger Wyoming Valley (GWV) and scheduled to undergo urgent CABG
  • Planned utilization of cardiopulmonary bypass during the surgical procedure

Who cannot join

  • Body mass index greater than 30 kg/m2
  • Estimated creatinine clearance less than 30 ml/min
  • History of persistent or permanent atrial fibrillation
  • Condition associated with oxidative stress or inflammation (e.g. chronic rheumatic, inflammatory or neoplastic disease, recent infection, etc.)
  • Currently taking corticosteroids, non-steroidal anti-inflammatory drugs or deferoxamine
  • History of oxalate kidney stones
Show all 10Show fewer
  • Currently pregnant
  • History of allergic reaction to ascorbic acid products
  • Currently taking any herbals or supplements (not including a multivitamin or calcium)
  • Enrolled in another research study

Trial locations and contacts

1 site in 1 country.

United States1 site

  • Geisinger Wyoming Valley Medical Center

    Wilkes-Barre, Pennsylvania, 18711

Other trials in United States

About this study

Official title: Advancing the Cardiovascular Science of Vitamin C in Cardiac Surgery Patients

Postoperative atrial fibrillation (POAF) is a common complication following cardiac surgery that increases the incidence of stroke, kidney injury and death. Vitamin C has been shown to decrease the incidence of POAF follow cardiac surgery, but the optimal dose has not been identified. With this project, the investigators plan to gather pharmacokinetic and dose-response data for vitamin C in the cardiac surgery population. The investigators plan to conduct a small interventional pilot study investigating the pharmacokinetics and pharmacodynamics of Vitamin C in patients undergoing coronary artery bypass graft (CABG) surgery. Patients enrolled will receive an intravenous dose of Vitamin C the day before surgery and the day after. Patients will have blood samples obtained with each dose for analysis of vitamin C concentrations and several biomarkers of oxidative stress. Analysis of samples will be performed within the Department of Pharmaceutical Sciences at Wilkes University.

Read the detailed description

The pathophysiology of post-operative atrial fibrillation (POAF) in cardiac surgery patients has not been fully elucidated, but inflammation and oxidative stress are associated with its occurrence. Increased activity of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and production of glutathione and nitrotyrosine have been found to occur in animal models of atrial fibrillation and patients who develop POAF. Similarly, malondialdehyde (MDA), a biomarker of lipid peroxidation, has also been shown to increase during cardiac surgery, and be significantly more elevated in patients who develop POAF. Cardiac surgery patients supplemented with ascorbic acid have reduced expression of NADPH oxidase and levels of MDA, glutathione and nitrotyrosine, and reduced POAF rates. Ascorbic acid supplementation has demonstrated a significant reduction in POAF in small clinical trials enrolling patients undergoing cardiac surgery. Collectively, these findings show that ascorbic acid prevents POAF in a novel way compared to recommended therapies such as beta-blockers and amiodarone, without the risk of significant side effects. However, the doses of ascorbic acid utilized in clinical trials have been found to inadequately suppress the production of inflammatory markers associated with POAF. Therefore, the maximum effect of ascorbic acid for POAF prevention may not have been realized in clinical trials published to date. These suboptimal responses may be attributable to known variances in medication pharmacokinetics in the cardiac surgery population that lead to reduced medication bioavailability, metabolism and elimination. The variation in ascorbic acid pharmacokinetics in this population is unknown. Thus, the contribution of the proposed research is expected to be determination of the pharmacokinetic profile of ascorbic acid and its concentration-response relationship with oxidative biomarkers associated with POAF in the cardiac surgery population.

Being tested
Ascorbic Acid
Keywords
Vitamin C, Postoperative atrial fibrillation, coronary artery bypass graft, ascorbic acid

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Ascorbic AcidDrug

    Also called Vitamin C

    Ascorbic acid doses will be mixed in 100 mL normal saline and infused over 60 minutes. The postoperative dose will be given on postoperative day #1.

Study groups in NCT03123107
Study groupRoleWhat they receive
Ascorbic AcidExperimental4 patients will receive 15 mg/kg of ascorbic acid IV the day before and after CABG surgery; 4 patients will receive 30 mg/kg of ascorbic acid IV the day before and after CABG surgery. The maximum dose of ascorbic acid will be 2 g.
Receives: Drug: Ascorbic Acid

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Ascorbate maximum serum concentration (Cmax)

    Maximum serum concentration of ascorbate obtained after drug administration.

    Measured: 1 year

  2. Half-life of serum ascorbate (T1/2)

    The amount of time is takes for the serum concentration of ascorbate to decrease by half.

    Measured: 1 year

  3. Elimination rate constant of ascorbate (Ke)

    The rate at which ascorbate is eliminated from the body

    Measured: 1 year

  4. Area under the concentration-time curve for serum ascorbate (AUC)

    Describes the overall concentration in the body given an administered dose of ascorbic acid.

    Measured: 1 year

  5. Change in biomarker concentrations

    This will consist of the concentrations of NADP+, NADPH, MDA, GGS and nitrotyrosine in blood and atrial tissue samples.

    Measured: Change within 24 hours; preoperative compared to postoperative

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted21 Apr 2017
  2. Study start6 Jul 2017
  3. Primary completion31 May 2019
  4. Study completion31 May 2019

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
6 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03123107
Sponsor's protocol ID
2016-0463
Status last verified
Jun 2021
First submitted
5 Apr 2017
Last updated
16 Jun 2021
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Antoniades C, Demosthenous M, Reilly S, Margaritis M, Zhang MH, Antonopoulos A, Marinou K, Nahar K, Jayaram R, Tousoulis D, Bakogiannis C, Sayeed R, Triantafyllou C, Koumallos N, Psarros C, Miliou A, Stefanadis C, Channon KM, Casadei B. Myocardial redox state predicts in-hospital clinical outcome after cardiac surgery effects of short-term pre-operative statin treatment. J Am Coll Cardiol. 2012 Jan 3;59(1):60-70. doi: 10.1016/j.jacc.2011.08.062.

    PubMed 22192670

  • Bruins P, te Velthuis H, Yazdanbakhsh AP, Jansen PG, van Hardevelt FW, de Beaumont EM, Wildevuur CR, Eijsman L, Trouwborst A, Hack CE. Activation of the complement system during and after cardiopulmonary bypass surgery: postsurgery activation involves C-reactive protein and is associated with postoperative arrhythmia. Circulation. 1997 Nov 18;96(10):3542-8. doi: 10.1161/01.cir.96.10.3542.

    PubMed 9396453

  • Carnes CA, Chung MK, Nakayama T, Nakayama H, Baliga RS, Piao S, Kanderian A, Pavia S, Hamlin RL, McCarthy PM, Bauer JA, Van Wagoner DR. Ascorbate attenuates atrial pacing-induced peroxynitrite formation and electrical remodeling and decreases the incidence of postoperative atrial fibrillation. Circ Res. 2001 Sep 14;89(6):E32-8. doi: 10.1161/hh1801.097644.

    PubMed 11557745

  • Castillo R, Rodrigo R, Perez F, Cereceda M, Asenjo R, Zamorano J, Navarrete R, Villalabeitia E, Sanz J, Baeza C, Aguayo R. Antioxidant therapy reduces oxidative and inflammatory tissue damage in patients subjected to cardiac surgery with extracorporeal circulation. Basic Clin Pharmacol Toxicol. 2011 Apr;108(4):256-62. doi: 10.1111/j.1742-7843.2010.00651.x. Epub 2010 Dec 8.

    PubMed 21138533

  • Colby JA, Chen WT, Baker WL, Coleman CI, Reinhart K, Kluger J, White CM. Effect of ascorbic acid on inflammatory markers after cardiothoracic surgery. Am J Health Syst Pharm. 2011 Sep 1;68(17):1632-9. doi: 10.2146/ajhp100703.

    PubMed 21856809

  • Dehghani MR, Majidi N, Rahmani A, Asgari B, Rezaei Y. Effect of oral vitamin C on atrial fibrillation development after isolated coronary artery bypass grafting surgery: A prospective randomized clinical trial. Cardiol J. 2014;21(5):492-9. doi: 10.5603/CJ.a2013.0154. Epub 2013 Dec 2.

    PubMed 24293167

  • Dingchao H, Zhiduan Q, Liye H, Xiaodong F. The protective effects of high-dose ascorbic acid on myocardium against reperfusion injury during and after cardiopulmonary bypass. Thorac Cardiovasc Surg. 1994 Oct;42(5):276-8. doi: 10.1055/s-2007-1016504.

    PubMed 7863489

  • Dudley SC Jr, Hoch NE, McCann LA, Honeycutt C, Diamandopoulos L, Fukai T, Harrison DG, Dikalov SI, Langberg J. Atrial fibrillation increases production of superoxide by the left atrium and left atrial appendage: role of the NADPH and xanthine oxidases. Circulation. 2005 Aug 30;112(9):1266-73. doi: 10.1161/CIRCULATIONAHA.105.538108.

    PubMed 16129811

  • Eslami M, Badkoubeh RS, Mousavi M, Radmehr H, Salehi M, Tavakoli N, Avadi MR. Oral ascorbic acid in combination with beta-blockers is more effective than beta-blockers alone in the prevention of atrial fibrillation after coronary artery bypass grafting. Tex Heart Inst J. 2007;34(3):268-74.

    PubMed 17948074

  • January CT, Wann LS, Alpert JS, Calkins H, Cigarroa JE, Cleveland JC Jr, Conti JB, Ellinor PT, Ezekowitz MD, Field ME, Murray KT, Sacco RL, Stevenson WG, Tchou PJ, Tracy CM, Yancy CW; American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. J Am Coll Cardiol. 2014 Dec 2;64(21):e1-76. doi: 10.1016/j.jacc.2014.03.022. Epub 2014 Mar 28. No abstract available.

    PubMed 24685669

  • Kim YM, Guzik TJ, Zhang YH, Zhang MH, Kattach H, Ratnatunga C, Pillai R, Channon KM, Casadei B. A myocardial Nox2 containing NAD(P)H oxidase contributes to oxidative stress in human atrial fibrillation. Circ Res. 2005 Sep 30;97(7):629-36. doi: 10.1161/01.RES.0000183735.09871.61. Epub 2005 Aug 25.

    PubMed 16123335

  • Kim YM, Kattach H, Ratnatunga C, Pillai R, Channon KM, Casadei B. Association of atrial nicotinamide adenine dinucleotide phosphate oxidase activity with the development of atrial fibrillation after cardiac surgery. J Am Coll Cardiol. 2008 Jan 1;51(1):68-74. doi: 10.1016/j.jacc.2007.07.085.

    PubMed 18174039

  • Mihm MJ, Yu F, Carnes CA, Reiser PJ, McCarthy PM, Van Wagoner DR, Bauer JA. Impaired myofibrillar energetics and oxidative injury during human atrial fibrillation. Circulation. 2001 Jul 10;104(2):174-80. doi: 10.1161/01.cir.104.2.174.

    PubMed 11447082

  • Papoulidis P, Ananiadou O, Chalvatzoulis E, Ampatzidou F, Koutsogiannidis C, Karaiskos T, Madesis A, Drossos G. The role of ascorbic acid in the prevention of atrial fibrillation after elective on-pump myocardial revascularization surgery: a single-center experience--a pilot study. Interact Cardiovasc Thorac Surg. 2011 Feb;12(2):121-4. doi: 10.1510/icvts.2010.240473. Epub 2010 Nov 23.

    PubMed 21098510

  • Pea F, Pavan F, Furlanut M. Clinical relevance of pharmacokinetics and pharmacodynamics in cardiac critical care patients. Clin Pharmacokinet. 2008;47(7):449-62. doi: 10.2165/00003088-200847070-00002.

    PubMed 18563954

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Ascorbic Acid in people with Coronary Artery Bypass Graft Surgery, run by Geisinger Clinic 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 2 inclusion and 10 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 16 Jun 2021. 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.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

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?

Ascorbate maximum serum concentration (Cmax) (time frame: 1 year). The study lists 5 primary outcomes in all. 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 NCT03123107, which also lists 17 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 16 Jun 2021.

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