Efficacy and Safety of Human Lipoprotein Lipase (LPL)[S447X] Expressed by an Adeno-Associated Viral Vector in LPL-deficient Subjects

Familial Lipoprotein Lipase Deficiency Clinical Trial

Official title:

An Open-label Study to Assess the Efficacy and Safety of Alipogene Tiparvovec (AMT-011), Human LPL [S447X], Expressed by an Adeno-Associated Viral Vector After Intramuscular Administration in LPL-deficient Adult Subjects

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00891306
• Other study ID #: CT-AMT-011-02
• Status: Completed
• Phase: Phase 2/Phase 3
• First received: April 30, 2009
• Last updated: September 28, 2011
• Start date: February 2009
• Est. completion date: April 2011

Study information

• Verified date: September 2011
• Source: Amsterdam Molecular Therapeutics
• Contact: n/a
• Is FDA regulated: No
• Health authority: Canada: Health Canada
• Study type: Interventional

Clinical Trial Summary

This trial is designed to expand the currently available data on the safety and efficacy of alipogene tiparvovec treatment in lipoprotein lipase deficiency (LPLD) and to further the understanding of possible mechanisms of action of the therapy.

Description:

LPLD is a rare autosomal recessive disorder, characterized by the presence of marked chylomicronemia and hence hypertriglyceridemia. Clinically the most severe manifestation of chylomicronemia, is acute pancreatitis, which can be lethal. There is no effective therapy available to modulate the course of the illness and prevent complications for these patients. The current clinical management consists of severe reduction of dietary fat that is hard if not almost impossible to comply with. LPLD subjects continue to experience pancreatitis attacks, and are admitted to intensive care units on several occasions.

Alipogene tiparvovec corrects or restores lipoprotein lipase (LPL) function long term, and hence reverses some symptoms, halts the disease progression and prevents further complications. Alipogene tiparvovec gene therapy ensures that a catabolically beneficial variant of the human LPL gene, LPL[S447X] is expressed and active in the relevant tissues in humans. Delivery of the gene is realized via intramuscular injection of an adeno-associated viral vector, pseudotyped with AAV1 capsids.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 5
• Est. completion date: April 2011
• Est. primary completion date: August 2010
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Being diagnosed with LPLD defined as:

• Confirmed homozygosity or compound heterozygosity for the mutations in the LPL gene, resulting in LPL deficiency

• Having a post heparin plasma LPL activity of = 20% of normal or a well defined mutation for which it is documented that the LPL mass and activity are within the limits described above

• Having a history of pancreatitis

• Having fluctuating TG concentrations with median fasting plasma TG concentrations > 10.00 mmol/L

• Being in good general physical health with, in the opinion of the investigator:

• No other clinically significant and relevant abnormalities in the medical history which could interfere with the participation to the study

• No clinically significant abnormalities at the physical examination which could interfere with the participation to the study

• No clinically significant abnormalities at the routine laboratory evaluation performed prior to the trial

• Women of non-child bearing potential or with a negative pregnancy test.

• Non breast feeding women

• Women using appropriate contraceptive (if relevant) and their partner using barrier contraception 2 weeks before starting immunosuppressive therapy

• Men practicing barrier birth control and their partner using appropriate contraception.

• Willing to fully comply with all study procedures and requirements of the trial such as restrictions to a low-fat diet.

Exclusion Criteria:

• Having a chronic inflammatory muscle disease.

• Any current or relevant previous history of serious, severe or unstable physical or psychiatric illness, any medical disorder that may make the subject unlikely to fully complete the study, or any condition that presents undue risk from the study medication or procedures based on the investigator's opinion(eg. malignant neoplasia)

• Active infectious disease of any nature, including clinically active viral infections

• Having one of the following outcomes from the blood screening tests after appropriate correction due to the presence of chylomicronemia:

• Platelet count < 100 x 109 /L

• Hemoglobin < 6.2 mmol/L

• Liver function disturbances (bilirubin =1.5 x normal, ALT > 2 x ULN (upper limit of normal)

• CPK > 2 x ULN

• Cockcroft-Gault estimated creatinine clearance < 50cc/min

• PT and PTT outside normal range or not determinable unless judged as acceptable for the subjects by the investigator

• Having a positive test for HIV, Hepatitis B, Hepatitis C or being positive for tuberculosis

• Obesity defined as body mass index (BMI) > 30 kg/m2

• Having a recent history of alcohol or drug abuse e.g. barbiturates, cannabinoids and amphetamines, and the subject is positive in a urine screen for drugs of abuse

• Using anti-coagulants

• Participation in another clinical trial or receipt of any other investigational drug within 30 days of screening or planning to participate in another clinical trial during the course of the study, except observational studies

• Subjects which cannot be treated with immunosuppressive medication or steroids

• Known to be allergic to any constituent of the therapy (including the immune suppressors) or a having a condition that prohibits the use of therapy

• Received previous treatment with AMT-010, Alipogene tiparvovec or other gene therapy investigational product

• Requiring a post heparin plasma LPL activity test for diagnostic confirmation and having a history of heparin induced thrombocytopenia or other heparin related complications

Study Design

Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Familial Lipoprotein Lipase Deficiency
• Hyperlipoproteinemia Type I

Intervention

Genetic:
• Alipogene Tiparvovec (AMT-011), Human LPL [S447X]
intra muscular, 1 x E12 gc per kg body weight, injected in a single series of intramuscular injections

Drug:
• mycophenolate mofetil
oral, 2 g/day, day -3 till week 12
• cyclosporine
oral, 3 mg/kg/day, day -3 till week 12
• methylprednisolone
single intravenous bolus of methylprednisolone (1 mg/kg bodyweight)

Locations

Country	Name	City	State
Canada	ECOGENE-21 Clinical Trial Center / Centre de santé et de services sociaux de Chicoutimi	Chicoutimi	Quebec
Canada	Centre des Maladies Lipidiques de Québec	Quebec

Sponsors (2)

Lead Sponsor	Collaborator
Amsterdam Molecular Therapeutics	The Clinical Trial Company

Country where clinical trial is conducted

Canada, 

References & Publications (5)

Rip J, Nierman MC, Sierts JA, Petersen W, Van den Oever K, Van Raalte D, Ross CJ, Hayden MR, Bakker AC, Dijkhuizen P, Hermens WT, Twisk J, Stroes E, Kastelein JJ, Kuivenhoven JA, Meulenberg JM. Gene therapy for lipoprotein lipase deficiency: working toward clinical application. Hum Gene Ther. 2005 Nov;16(11):1276-86. — View Citation

Ross CJ, Liu G, Kuivenhoven JA, Twisk J, Rip J, van Dop W, Excoffon KJ, Lewis SM, Kastelein JJ, Hayden MR. Complete rescue of lipoprotein lipase-deficient mice by somatic gene transfer of the naturally occurring LPLS447X beneficial mutation. Arterioscler Thromb Vasc Biol. 2005 Oct;25(10):2143-50. Epub 2005 Jul 7. — View Citation

Ross CJ, Twisk J, Bakker AC, Miao F, Verbart D, Rip J, Godbey T, Dijkhuizen P, Hermens WT, Kastelein JJ, Kuivenhoven JA, Meulenberg JM, Hayden MR. Correction of feline lipoprotein lipase deficiency with adeno-associated virus serotype 1-mediated gene transfer of the lipoprotein lipase S447X beneficial mutation. Hum Gene Ther. 2006 May;17(5):487-99. — View Citation

Ross CJ, Twisk J, Meulenberg JM, Liu G, van den Oever K, Moraal E, Hermens WT, Rip J, Kastelein JJ, Kuivenhoven JA, Hayden MR. Long-term correction of murine lipoprotein lipase deficiency with AAV1-mediated gene transfer of the naturally occurring LPL(S447X) beneficial mutation. Hum Gene Ther. 2004 Sep;15(9):906-19. — View Citation

Stroes ES, Nierman MC, Meulenberg JJ, Franssen R, Twisk J, Henny CP, Maas MM, Zwinderman AH, Ross C, Aronica E, High KA, Levi MM, Hayden MR, Kastelein JJ, Kuivenhoven JA. Intramuscular administration of AAV1-lipoprotein lipase S447X lowers triglycerides in lipoprotein lipase-deficient patients. Arterioscler Thromb Vasc Biol. 2008 Dec;28(12):2303-4. doi: 10.1161/ATVBAHA.108.175620. Epub 2008 Sep 18. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Reduction of triglyceride (TG) concentrations		12 weeks	No
Secondary	Reduction of chylomicrons and/or chylomicron-TG ratio		12 weeks	No
Secondary	To determine the biological activity and expression of the lipoprotein lipase [LPLS447X] transgene product		14 weeks	No
Secondary	To assess the safety profile		14 weeks	Yes
Secondary	To assess shedding of viral vector		14 weeks	Yes