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EXPLORE: A Natural History Study of Acute Hepatic Porphyria (AHP)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Alnylam Pharmaceuticals Identifier:
First received: September 11, 2014
Last updated: December 11, 2015
Last verified: December 2015
The purpose of this study is to characterize the natural history and clinical management of Acute Hepatic Porphyria (AHP) patients with recurring attacks.

Acute Hepatic Porphyria

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: A Natural History Study of Acute Hepatic Porphyria (AHP) Patients With Recurrent Attacks

Resource links provided by NLM:

Further study details as provided by Alnylam Pharmaceuticals:

Primary Outcome Measures:
  • Medical history of AHP patients [ Time Frame: Baseline to 6-Month Follow-Up Visit ]
  • Medication usage of AHP patients [ Time Frame: Baseline to 6-Month Follow-Up Visit ]

Secondary Outcome Measures:
  • Plasma biomarkers [ Time Frame: 0, 6 months and During Attacks ]
  • Porphyria signs and symptoms [ Time Frame: 0, 2, 4, 6 months ]
  • Quality of Life [ Time Frame: 0, 6 months ]
  • Urine biomarkers [ Time Frame: 0, 6 months and During Attacks ]
  • Healthcare Utilization [ Time Frame: 0, 6 months ]

Biospecimen Retention:   Samples Without DNA
Urine and plasma samples for known proteins associated with porphyria attacks.

Enrollment: 112
Study Start Date: August 2014
Estimated Study Completion Date: November 2016
Primary Completion Date: November 2015 (Final data collection date for primary outcome measure)
Acute Hepatic Porphyria


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Acute Hepatic Porphyria

Inclusion Criteria:

  • Males and females aged > 18 years
  • Diagnosis of AHP [acute intermittent porphyria (AIP), variegate porphyria (VP), and hereditary coproporphyria (HCP)]
  • Porphyria attacks in the past 12 months or receiving treatment to prevent attacks
  • Willing to provide written informed consent, medical records, and to comply with study requirements

Exclusion Criteria:

• Current participation in a clinical trial of an investigational product

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT02240784

  Show 19 Study Locations
Sponsors and Collaborators
Alnylam Pharmaceuticals
Study Director: Amy Simon, MD Alnylam Pharmaceuticals
  More Information

Responsible Party: Alnylam Pharmaceuticals Identifier: NCT02240784     History of Changes
Other Study ID Numbers: ALN-AS1-NT-001
Study First Received: September 11, 2014
Last Updated: December 11, 2015

Keywords provided by Alnylam Pharmaceuticals:

Additional relevant MeSH terms:
Porphyria, Erythropoietic
Porphyrias, Hepatic
Coproporphyria, Hereditary
Metabolic Diseases
Skin Diseases, Genetic
Genetic Diseases, Inborn
Skin Diseases
Liver Diseases
Digestive System Diseases processed this record on April 28, 2017