Exercise Versus DDAVP in Patients With Mild Hemophilia A

Exercise Versus DDAVP in Patients With Mild Hemophilia A - is One Non-inferior to the Other and do They Work Additively in Improving Hemostasis?

Individuals with mild hemophilia A (MHA) bleed infrequently but can in the setting of trauma which often is when participating in sports/exercise. Although both exercise and DDAVP (desmopressin) can raise Factor 8/Von Willebrand Factor (FVIII/VWF levels), it is not clear whether the pathophysiological mechanism is the same. Consequently it is not known if DDAVP and exercise would have additive effects in raising FVIII:C and VWF levels or if one would one negate the effect of the other. The aim of this 2 center (Sickkids and Nationwide Children's), prospective, cross-over design study is to compare the impact of exercise vs. DDAVP on hemostasis in patients with MHA and also to investigate the impact of sequentially administering these interventions on their hemostatic indices.

Study Overview

• Status: Completed
• Conditions: Hemophilia A
• Intervention / Treatment: Drug: DDAVP Inhalant Product; Behavioral: Exercise Intervention

Detailed Description

Persons with mild hemophilia A (MHA) (defined as having a FVIII level of >5% to ≈50%) bleed infrequently but can in the setting of trauma which can often is in the context of participating in sports/exercise. FVIII levels temporarily rise with stress, exercise and with DDAVP (1-desamino-8-Darginine vasopressin, desmopressin). In the case of DDAVP, the Hospital for Sick Children (SickKids) Hemophilia Team and others have shown that FVIII and VWF levels rise by 2-4 fold with DDAVP. Consequently many persons with MHA in an attempt to reduce their risk of bleeding take intranasal (IN) DDAVP prior to sports activities/exercise. IN DDAVP is reasonably expensive ($300/bottle of Octistim® in Canada and $700/bottle of Stimate® in USA), requires fluid restriction, and may be associated with nausea, vomiting, seizures and tachyphylaxis.

Recently, our group completed a pilot/feasibility study to evaluate the impact of a prescribed, moderate intensity aerobic exercise regimen on hemostatic indices in 30 children with hemophilia A [HA] or B [HB] (all severities) and documented a significant improvement in multiple coagulation parameters (platelet count, FVIII:C and von Willebrand factor [VWF]) with exercise. This improvement was particularly pronounced in 13 post-adolescent males with mild-moderate HA. In this sub-cohort, the investigators noted a mean 2.3 fold increase in FVIII:C immediately after exercise, which remained significantly elevated at 1.9 fold,1 hour after completion of exercise

These changes in hemostatic variables associated with aerobic exercise may be protective against bleeding, and may negate the need to administer IN DDAVP immediately prior to sports participation.

Although both exercise and DDAVP can raise FVIII/VWF levels, it is not clear whether the pathophysiological mechanism in which they do this is the same. Consequently it is not known if DDAVP and exercise would augment each other's effects in raising FVIII:C and VWF levels or if one would one negate the effect of the other. Herein, the investigators propose a prospective, interventional study of exercise vs IN DDAVP in 40-50 post adolescent (13-21 yr) males with MHA to compare their impact on hemostasis and also to investigate the impact of sequentially administering these interventions on hemostatic indices.

• Study Type: Interventional
• Enrollment (Actual): 32
• Phase: Phase 4

Contacts and Locations

Study Locations

• United States
  • Indiana
    • Indianapolis, Indiana, United States, 46260
      • Indiana Hemophilia and Thrombosis Center
  • Ohio
    • Akron, Ohio, United States, 44308
      • Akron Children's Hospital
    • Columbus, Ohio, United States, 43205
      • Nationwide Children's Hospital
    • Dayton, Ohio, United States, 45404
      • Dayton Children's Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 13 years to 21 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• 1) Patients of ≥13 years of age and ≤21 years of age with MHA (FVIII:C level of ≥6% to ≤50%).

Exclusion Criteria:

1. A currently circulating or a history of inhibitor (0.5 BU on two or more occasions). Inhibitor development is rare in MHA.
2. History of FVIII infusion (both standard-acting and extended half-life products) or DDAVP use in preceding 1 week. Patients will be instructed to hold factor use or DDAVP for 1-week prior to participation in study, except for management of acute bleeds, in which case they will be instructed to inform the PI via telephone or e-mail.
3. Patients with severe arthropathy (as determined by the principal investigator) interfering with ability to exercise. Severe arthropathy is rare in MHA.
4. Patients on beta-blockers, anti-platelet agents or regular non-steroidal anti-inflammatory medications (e.g. Celebrex).
5. Patients who are active smokers (cigarettes, marijuana).
6. Patients with a history of a recent bleed (in preceding 2 weeks) in any location or a joint/muscle bleed in the lower limbs in the preceding 4 weeks.
7. Co-existence of a congenital bleeding disorder other than MHA (e.g. VWD).
8. Patients with an active infectious or inflammatory condition. This includes previously identified HIV, active hepatitis B or C as reflected in elevated AST, ALT, RNA positivity for hepatitis B or C. HIV, hepatitis B and C are very rare in the age group (13-21 years) we hope to accrue in the proposed study.
9. Patients who for medical reasons should not receive DDAVP [those with renal or CNS disease (e.g. brain tumor)] or have previously experienced adverse events with DDAVP (e.g. hypotensive event, seizure).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: ARM A: DDAVP followed by exercise; Intervention #1: DDAVP Inhalant Product intervention The participant will take either 1 or 2 nasal sprays of IN DDAVP. For patients weighing <50 kg: 150 ug (i.e. 1 spray into one nostril) and patients weighing ≥50 kg: 300 ug (i.e. 2 sprays - one into each nostril).; Intervention #2: Exercise intervention	Drug: DDAVP Inhalant Product; For the DDAVP intervention the participant will take either 1 or 2 nasal sprays of IN DDAVP. After receiving IN DDAVP, the participant will rest for 30 minutes.; Other Names: IN DDAVP; Behavioral: Exercise Intervention; For the exercise intervention the participant will exercise on a stationary cycle-ergometer using the previously-validated, progressively-incremental Godfrey protocol. Per the Godfrey protocol, the participant starts cycling on the calibrated cycle-ergometer with an initial exercise load that is dependent on their height. The workload is increased every minute in standard increments also based on the participant's height. All participants will exercise till they complete 3-minutes of cycling at 85% of their maximum predicted heart rate or till exhaustion (whichever comes first). Upon completion of planned exercise, work load will be decreased to zero watts and participants will be instructed to continue cycling at this cool-down rate for additional 3-minutes, before getting of the ergometer.
Active Comparator: ARM B: DDAVP alone; Intervention #1: DDAVP Inhalant Product intervention The participant will take either 1 or 2 nasal sprays of IN DDAVP. For patients weighing <50 kg: 150 ug (i.e. 1 spray into one nostril) and patients weighing ≥50 kg: 300 ug (i.e. 2 sprays - one into each nostril).; Intervention #2: no further intervention (rest)	Drug: DDAVP Inhalant Product; For the DDAVP intervention the participant will take either 1 or 2 nasal sprays of IN DDAVP. After receiving IN DDAVP, the participant will rest for 30 minutes.; Other Names: IN DDAVP
Experimental: ARM C: Exercise intervention; Intervention #1: Exercise intervention; Intervention #2: no further intervention (rest)	Behavioral: Exercise Intervention; For the exercise intervention the participant will exercise on a stationary cycle-ergometer using the previously-validated, progressively-incremental Godfrey protocol. Per the Godfrey protocol, the participant starts cycling on the calibrated cycle-ergometer with an initial exercise load that is dependent on their height. The workload is increased every minute in standard increments also based on the participant's height. All participants will exercise till they complete 3-minutes of cycling at 85% of their maximum predicted heart rate or till exhaustion (whichever comes first). Upon completion of planned exercise, work load will be decreased to zero watts and participants will be instructed to continue cycling at this cool-down rate for additional 3-minutes, before getting of the ergometer.
Experimental: ARM D: Exercise followed by DDAVP; Intervention #1: Exercise intervention; Intervention #2: DDAVP Inhalant Product intervention The participant will take either 1 or 2 nasal sprays of IN DDAVP. For patients weighing <50 kg: 150 ug (i.e. 1 spray into one nostril) and patients weighing ≥50 kg: 300 ug (i.e. 2 sprays - one into each nostril).	Drug: DDAVP Inhalant Product; For the DDAVP intervention the participant will take either 1 or 2 nasal sprays of IN DDAVP. After receiving IN DDAVP, the participant will rest for 30 minutes.; Other Names: IN DDAVP; Behavioral: Exercise Intervention; For the exercise intervention the participant will exercise on a stationary cycle-ergometer using the previously-validated, progressively-incremental Godfrey protocol. Per the Godfrey protocol, the participant starts cycling on the calibrated cycle-ergometer with an initial exercise load that is dependent on their height. The workload is increased every minute in standard increments also based on the participant's height. All participants will exercise till they complete 3-minutes of cycling at 85% of their maximum predicted heart rate or till exhaustion (whichever comes first). Upon completion of planned exercise, work load will be decreased to zero watts and participants will be instructed to continue cycling at this cool-down rate for additional 3-minutes, before getting of the ergometer.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
•Factor 8 level after exercise [ Time Frame: Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention #2	To compare the increase in FVIII:C (measured as absolute and fold increase) associated with a standardized moderate intensity aerobic exercise regimen (3-minutes of exercise at 85% of the predicted maximum heart rate) to intranasal DDAVP in post-adolescent males with MHA	Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention #2

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
•Factor 8 level after sequential administration of exercise followed by IN DDAVP (or vice versa) [ Time Frame: Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention	To determine the absolute and fold increase in FVIII:C associated with the sequential administration of exercise followed by intranasal DDAVP (or vice versa)	Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention
•Associations between baseline physical activity scores and Factor 8 levels after exercise [ Time Frame: Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention	To explore the impact of baseline physical activity (measured using the International Physical Activity Questionnaire [IPAQ]-short form) on exercise induced increase in FVIII:C	Baseline, 30 min post intervention #1, 30 min post intervention #2 and 90 minute post intervention

Collaborators and Investigators

• Sponsor: Nationwide Children's Hospital
• Collaborators: The Hospital for Sick Children
• Investigators: Principal Investigator: Riten Kumar, MD, MSc, Nationwide Children's Hospital

Study record dates

Study Major Dates

• Study Start (Actual): July 31, 2018
• Primary Completion (Actual): August 30, 2019
• Study Completion (Actual): December 5, 2019

Study Registration Dates

• First Submitted: December 5, 2017
• First Submitted That Met QC Criteria: December 17, 2017
• First Posted (Actual): December 20, 2017

Study Record Updates

• Last Update Posted (Actual): February 25, 2020
• Last Update Submitted That Met QC Criteria: February 24, 2020
• Last Verified: February 1, 2020

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Hematologic Diseases; Blood Coagulation Disorders, Inherited; Coagulation Protein Disorders; Hemorrhagic Disorders; Genetic Diseases, Inborn; Blood Coagulation Disorders; Hemophilia A; Physiological Effects of Drugs; Natriuretic Agents; Hemostatics; Coagulants; Antidiuretic Agents; Deamino Arginine Vasopressin
• Other Study ID Numbers: IRB17-00290

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: Yes

IPD Plan Description

To ensure the safety of patients and to confirm the validity of our hypothesis, we plan to:

• Meet after the first 10 patients have completed the study.
• Analyze data from first 10 patients. This includes safety data as well as results of the blood tests including the standard hemostasis testing (FVIII;C, VWF:Ag, VWF:RCo, VWF:CBA, VWF:pp), platelet function (PFA), Thromboelastography (TEG) and Thrombin generation.
• Determine whether there are measurable outcomes justifying further enrollment and DSMB will be able to make recommendations regarding terminating the study or amending the protocol if they deem that there are safety issues.

If any of the first 10 subjects develops any unexpected medical complication we will suspend recruitment pending re-evaluation of the study by the DSMB.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No