Sildenafil for the Treatment of Lymphatic Malformations

Lymphatic Diseases Clinical Trial

Official title:

Phase 2 Study of Sildenafil for the Treatment of Lymphatic Malformations

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02335242
• Other study ID #: 23400
• Secondary ID: R01FD004372
• Status: Completed
• Phase: Phase 2
• Start date: May 23, 2015
• Est. completion date: March 30, 2021

Study information

• Verified date: October 2022
• Source: Stanford University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

A Phase 2 study to evaluate safety and efficacy of sildenafil taken orally to improve or resolve lymphatic malformations in children. Subjects may receive either placebo or treatment in an oral dosage with an open label extension for subjects who received placebo. The study treatment assignment will be randomized in a double blind fashion. MRI examination will evaluate change in lesion volume due to treatment. Other safety and efficacy measures will be taken through the 32-week study duration.

Funding Source - FDA OOPD

Description:

Lymphatic malformations (LMs) are localized areas of abnormal development of the lymphatic system that commonly occur in the head and neck of children. LMs are considered a rare or orphan disease which causes complications including pain, ulceration, secondary infection, infiltration of other organs, and death. Current therapies involve surgical excision or methods of chemical or physical destruction of portions of lesions. No therapies are uniformly effective and all have the risk of significant adverse events. We recently witnessed almost complete resolution of a LM lesion in a child who was treated with sildenafil oral therapy for pulmonary arterial hypertension. We have subsequently evaluated additional subjects who improved with sildenafil. The goal of this clinical research trial is to document the benefit or absence of benefit of sildenafil therapy for LMs and identify which type of patient will benefit from sildenafil. This study is a double-blind placebo-controlled trial which involves precise documentation of volume changes associated with therapy or placebo by using MRI segmentation techniques. We will also observe and document the clinical response to sildenafil or placebo using clinical evaluation scores and surveys. The results of the study should identify characteristics of LM lesions which may suggest a beneficial response to sildenafil therapy. Sildenafil has very low risk of side effects in the dosage used in this trial. Documentation of an effective response of LMs to sildenafil will accelerate the interest in, and the ability to understand, the mechanisms of LM formation and treatment.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 22
• Est. completion date: March 30, 2021
• Est. primary completion date: March 30, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 6 Months to 10 Years

Eligibility

Inclusion Criteria:

Subjects must:

• Be legally authorized representative of subjects willing and able to give consent. Assent obtained for subjects 7 - 10 years old.

• Be between the ages of 6 months - 10 years of age at the time of entry into the study.

• Be at the minimum weight of 8 kg at the time of enrollment.

• Be required to have the clinical diagnosis of lymphatic malformation that appears to be over 3 cm in greatest diameter in order to be evaluated for entry. A review of a previous MRI examination may help confirm the entry criteria on subjects selected to come to Stanford for the MRI screening.

• Have the lymphatic malformation cause enough disability for the subject that requires them to consider systemic therapy.

• For female subjects: must not be pregnant or breast-feeding.

• Have a parent or legally authorized representative willing and able to ensure subject is present for all required study visits.

• Have a required MRI examination to confirm that the lymphatic malformation is present and is greater than 3 cm in diameter in order for the subjects to receive medication, which happens during the initial screening evaluation portion of the trial.

• Have no contraindications for the use of sildenafil.

• Have a normal eye examination.

• Have normal liver and kidney function.

• Have no contraindication to MRI examinations such as metal implants, etc.

• Not be a smoker.

Exclusion Criteria:

A Subject with any of the following criteria is not eligible for inclusion in this study:

• Medically unstable health status that may interfere with his/her ability to complete the study.

• Has one or more of the following medical conditions:

Hepatic impairment, severe renal impairment, lymphedema conditions such as Milroy disease, Meige lymphedema, Hennekam syndrome, Njolstad syndrome, Aagenaes syndrome, and Fabry disease, hypotension or at risk for hypotension, seizures or history of seizures, any significant cardiovascular risk factors and any condition which requires participants to use nitric oxide donors or nitrates in any form, underlying anatomic or vascular risk factor for developing non-arteritic anterior ischemic optic neuropathy (NAION) including low ocular cup to disc ratio, diabetes, hypertension, coronary artery disease, or hyperlipidemia Participants with Down syndrome, Turner syndrome and Noonan syndrome will be considered on a case-by-case basis.

• Has received at least one of the following medications contraindicated in association with sildenafil within 15 days of inclusion:

• Organic nitrates in any form, either regularly or intermittently -- Consistent with its known effects on the nitric oxide/cGMP pathway, sildenafil was shown to potentiate the hypotensive effects of nitrates.

• Ritonavir and other Potent CYP3A Inhibitors --- Concomitant use of REVATIO with ritonavir and other potent CYP3A inhibitors is not recommended.

• Alpha-blockers --- co-administering alpha-blockers with REVATIO because of additive blood pressure-lowering effects

• Amlodipine

• Cimetidine

• Requires concomitant use of potent cytochrome P450 3A4 inhibitors (such as ketoconazole, itraconazole, erythromycin, saquinavir), or concomitant use of ritonavir. Also excluded are concomitant use of organic nitrates, alpha-blockers, amlodipine, or cimetidine.

• Cannot confirm that the lesion is a lymphatic malformation or the lymphatic malformation is less than 3 cm in its greatest diameter during the MRI screening.

• Has had extensive prior surgery or sclerotherapy to treat LM such that scarring may interfere with evaluation and treatment effect of sildenafil.

• Have had recurrent infection and significant scarring of the lesion secondary to infection to such an extent that the that scarring may interfere with evaluation and treatment effect of sildenafil

• Known to have an allergy to sildenafil.

• Has ulcerated or currently infected LMs.

• Has diagnosis of the soft tissue tumor as LM not clinically certain.

• Participating in another clinical study which may interfere.

• Has a history of priapism or is diagnosed with sickle cell anemia or any other disorder which may predispose to priapism.

Related Conditions & MeSH terms

• Congenital Abnormalities
• Lymphangioma
• Lymphatic Abnormalities
• Lymphatic Diseases
• Lymphatic Malformations

Intervention

Drug:
• Sildenafil 20 mg tablets

Other:
• Placebo tablets (resembling Revatio)

Locations

Country	Name	City	State
United States	University of Colorado, Denver	Aurora	Colorado
United States	Ann & Robert H. Lurie Children's Hospital of Chicago	Chicago	Illinois
United States	Stanford University	Stanford	California

Sponsors (2)

Lead Sponsor	Collaborator
Stanford University	Ann & Robert H Lurie Children's Hospital of Chicago

Country where clinical trial is conducted

United States, 

References & Publications (20)

Abrams D, Schulze-Neick I, Magee AG. Sildenafil as a selective pulmonary vasodilator in childhood primary pulmonary hypertension. Heart. 2000 Aug;84(2):E4. — View Citation

Barst RJ, Ivy DD, Gaitan G, Szatmari A, Rudzinski A, Garcia AE, Sastry BK, Pulido T, Layton GR, Serdarevic-Pehar M, Wessel DL. A randomized, double-blind, placebo-controlled, dose-ranging study of oral sildenafil citrate in treatment-naive children with pulmonary arterial hypertension. Circulation. 2012 Jan 17;125(2):324-34. doi: 10.1161/CIRCULATIONAHA.110.016667. Epub 2011 Nov 29. — View Citation

Berk DR, Berk EJ, Bruckner AL. A novel method for calculating the volume of hemangiomas. Pediatr Dermatol. 2011 Jul-Aug;28(4):478-82. doi: 10.1111/j.1525-1470.2011.01498.x. — View Citation

Blei F. Congenital lymphatic malformations. Ann N Y Acad Sci. 2008;1131:185-94. doi: 10.1196/annals.1413.016. Review. — View Citation

Churchill P, Otal D, Pemberton J, Ali A, Flageole H, Walton JM. Sclerotherapy for lymphatic malformations in children: a scoping review. J Pediatr Surg. 2011 May;46(5):912-22. doi: 10.1016/j.jpedsurg.2011.02.027. Review. — View Citation

de Graaf M, Breur JMPJ, Raphaël MF, Vos M, Breugem CC, Pasmans SGMA. Adverse effects of propranolol when used in the treatment of hemangiomas: a case series of 28 infants. J Am Acad Dermatol. 2011 Aug;65(2):320-327. doi: 10.1016/j.jaad.2010.06.048. Epub 2011 May 20. — View Citation

Fisher R, Partington A, Dykes E. Cystic hygroma: comparison between prenatal and postnatal diagnosis. J Pediatr Surg. 1996 Apr;31(4):473-6. — View Citation

Frieden IJ, Drolet BA. Propranolol for infantile hemangiomas: promise, peril, pathogenesis. Pediatr Dermatol. 2009 Sep-Oct;26(5):642-4. doi: 10.1111/j.1525-1470.2009.00977.x. — View Citation

Fuchsmann C, Quintal MC, Giguere C, Ayari-Khalfallah S, Guibaud L, Powell J, McCone C, Froehlich P. Propranolol as first-line treatment of head and neck hemangiomas. Arch Otolaryngol Head Neck Surg. 2011 May;137(5):471-8. doi: 10.1001/archoto.2011.55. — View Citation

Gallagher PG, Mahoney MJ, Gosche JR. Cystic hygroma in the fetus and newborn. Semin Perinatol. 1999 Aug;23(4):341-56. Review. — View Citation

Greene AK, Perlyn CA, Alomari AI. Management of lymphatic malformations. Clin Plast Surg. 2011 Jan;38(1):75-82. doi: 10.1016/j.cps.2010.08.006. Review. — View Citation

Howarth ES, Draper ES, Budd JL, Konje JC, Clarke M, Kurinczuk JJ. Population-based study of the outcome following the prenatal diagnosis of cystic hygroma. Prenat Diagn. 2005 Apr;25(4):286-91. — View Citation

Karatza AA, Bush A, Magee AG. Safety and efficacy of Sildenafil therapy in children with pulmonary hypertension. Int J Cardiol. 2005 Apr 20;100(2):267-73. — View Citation

Léauté-Labrèze C, Dumas de la Roque E, Hubiche T, Boralevi F, Thambo JB, Taïeb A. Propranolol for severe hemangiomas of infancy. N Engl J Med. 2008 Jun 12;358(24):2649-51. doi: 10.1056/NEJMc0708819. — View Citation

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Redondo P, Aguado L, Martínez-Cuesta A. Diagnosis and management of extensive vascular malformations of the lower limb: part I. Clinical diagnosis. J Am Acad Dermatol. 2011 Nov;65(5):893-906; quiz 907-8. doi: 10.1016/j.jaad.2010.12.047. Review. — View Citation

Sans V, de la Roque ED, Berge J, Grenier N, Boralevi F, Mazereeuw-Hautier J, Lipsker D, Dupuis E, Ezzedine K, Vergnes P, Taïeb A, Léauté-Labrèze C. Propranolol for severe infantile hemangiomas: follow-up report. Pediatrics. 2009 Sep;124(3):e423-31. doi: 10.1542/peds.2008-3458. Epub 2009 Aug 10. — View Citation

Shekerdemian LS, Ravn HB, Penny DJ. Intravenous sildenafil lowers pulmonary vascular resistance in a model of neonatal pulmonary hypertension. Am J Respir Crit Care Med. 2002 Apr 15;165(8):1098-102. — View Citation

Wang P, Wu P, Egan RW, Billah MM. Identification and characterization of a new human type 9 cGMP-specific phosphodiesterase splice variant (PDE9A5). Differential tissue distribution and subcellular localization of PDE9A variants. Gene. 2003 Sep 18;314:15-27. — View Citation

Whimster IW. The pathology of lymphangioma circumscriptum. Br J Dermatol. 1976 May;94(5):473-86. — View Citation

* Note: There are 20 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in Lesion Volume of the Test Medication as Evaluated by MRI Examination.	Participants will be followed for the duration of the study, an expected average of 20 weeks.	Baseline, week 20
Secondary	Change in Subject's Assessment of Change in Lymphatic Malformation Overall Score	Subject's evaluation of the overall change in lymphatic malformation. Participants will be followed from baseline to 20 weeks.; Patients rated change as no improvement, minimal improvement (1-25% change), fair improvement (25-50% change), good improvement (50-75% change), and excellent improvement (75-100% change).	Baseline, week 20