Longitudinal Study of Genetic Causes of Intrahepatic Cholestasis (LOGIC)

Arbor Research Collaborative for Health

Status: Suspended

Conditions: Alagille Syndrome; Alpha 1-Antitrypsin Deficiency; Liver Diseases

Study type: Observational

Funder types: Other; NIH

Identifiers

NCT00571272

U01DK062456 (U.S. NIH Grant/Contract)

U01DK062500 (U.S. NIH Grant/Contract)

LOGIC Study - ChiLDReN Network

U01DK103135 (U.S. NIH Grant/Contract)

U01DK103149 (U.S. NIH Grant/Contract)

U01DK062453 (U.S. NIH Grant/Contract)

U01DK084538 (U.S. NIH Grant/Contract)

U01DK062470 (U.S. NIH Grant/Contract)

U01DK084575 (U.S. NIH Grant/Contract)

U01DK103140 (U.S. NIH Grant/Contract)

U01DK062445 (U.S. NIH Grant/Contract)

U01DK062452 (U.S. NIH Grant/Contract)

U01DK062466 (U.S. NIH Grant/Contract)

U01DK062436 (U.S. NIH Grant/Contract)

U01DK062497 (U.S. NIH Grant/Contract)

U24DK062456 (U.S. NIH Grant/Contract)

U01DK062503 (U.S. NIH Grant/Contract)

U01DK084536 (U.S. NIH Grant/Contract)

U01DK062481 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

Cholestasis is a condition in which bile is not properly transported from the liver to the small intestine. Cholestasis can be caused by an array of childhood diseases, including the genetic diseases Alagille syndrome (ALGS), alpha-1 antitrypsin (a-1AT) deficiency, bile acid synthesis and metabolism defects, and progressive familial intrahepatic cholestasis (PFIC) or benign recurrent intrahepatic cholestasis(BRIC). This study will investigate the natural history and progression of the four previously mentioned cholestatic liver diseases to provide a better understanding of the causes and effects of the diseases.

Full description

Cholestasis is a rare condition that involves a reduction or obstruction of bile flow from the liver to the small intestine. When bile flow is hindered, a waste product pigment called bilirubin can escape into the bloodstream and build up to harmful levels. This may lead to the easily recognizable cholestatic symptoms of jaundice, itching, and impaired growth and eventually to more serious health problems. Four rare genetic liver disorders- ALGS, a-1AT, bile acid synthesis and metabolism defects, and PFIC-account for about 20% to 30% of all infant cases of cholestasis. These four disorders compose a group of related diseases that can cause significant growth problems during childhood, serious liver problems, the need for liver transplantation, and potentially death. More research on these rare liver diseases is necessary to develop a scientific basis for improvement in diagnostic techniques and treatments. Current diagnostic procedures are complex, and the development of simpler diagnostic tests would facilitate early diagnosis and treatment. This study will investigate the natural history and progression of the four previously mentioned cholestatic liver diseases to provide a better understanding of the causes and effects of the diseases.

Participants who have been previously enrolled into this study will be followed for 20 years, until transplanted, or death. Study visits will involve review of clinical information, family history, and any clinically indicated treatments and their outcomes; a physical exam; laboratory tests; and radiologic and imaging evaluations.

Enrollment: 1,675 estimated patients

Sex: All

Ages: Under 25 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Children and young adults diagnosed with one of the four cholestatic diseases from birth through 25 years old.
2. Siblings of participants with alpha-1-antitrypsin deficiency, who are affected with alpha-1-antitrypsin deficiency, but have no evidence of liver disease.
3. Both sexes, all races and ethnic groups.
4. Participant meets the enrollment criteria for one of the four cholestatic liver diseases.
5. Patient and/or parent/legal guardian have the ability to provide written informed consent for enrollment.

Exclusion criteria

1. Inability to comply with the longitudinal follow-up described in the protocol.

Trial design

1,675 participants in 4 patient groups

1

Description:

Infants less than 6 months old with a cholestatic liver disease who were initially enrolled into the Childhood Liver Disease Research and Education Network (ChiLDREN) Prospective Biliary Atresia Epidemiology study (PROBE study; P003)

2

Description:

Participants with a cholestatic liver disease who are between birth and 25 years old who were NOT initially enrolled into the Childhood Liver Disease Research and Education Network (ChiLDREN) Prospective Biliary Atresia Epidemiology study (PROBE study; P003)

3

Description:

Post-liver transplant participants with a cholestatic liver disease who are between 1 day and 25 years old. Affected parents of patients enrolled in the study are eligible for enrollment if they are 25 years old or less

5

Description:

Affected siblings (without evidence of liver disease) of Alpha-1 Antitrypsin Deficiency participants who are enrolled in LOGIC.