sebelipase alfa

General

Pronunciation:
se-be-lye-pase al-fa

Trade Name(s)

• Kanuma

Ther. Class.
none assigned

Pharm. Class.
enzymes

Indications

Treatment of lysosomal acid lipase (LAL) deficiency.

Action

Being a recombinant form of LAL, it binds to cell surface receptors via glycans expressed on the protein and is subsequently internalized into lysosomes. It then catalyzes the lysosomal hydrolysis of cholesteryl esters and triglycerides to free cholesterol, glycerol, and free fatty acids.

Therapeutic Effect(s):

Improved survival in infants; improved lipids in adults and children.

Pharmacokinetics

Absorption: IV administration results in complete bioavailability.

Distribution: Well distributed.

Metabolism and Excretion: Unknown.

Half-life: 5.4–6.6 min.

TIME/ACTION PROFILE (blood levels)

Contraindication/Precautions

Contraindicated in:

• Hypersensitivity to eggs.

Use Cautiously in:

• Geri: Older adults (safety and effectiveness not established);
• OB: Lactation: Pregnancy and lactation (safety not established);
• Pedi: Children <1 mo (safety and effectiveness not established).

Adverse Reactions/Side Effects

CV: tachycardia

CNS: headache, anxiety

EENT: nasopharyngitis, rhinitis, sneezing

GI: diarrhea, oropharyngeal pain, vomiting, constipation, nausea

Hemat: anemia

Metabolic: ↑ LDL cholesterol, ↑ triglycerides

MS: hypotonia

Resp: cough, hypoxemia

Misc: HYPERSENSITIVITY REACTIONS (INCLUDING ANAPHYLAXIS, URTICARIA), fever

* CAPITALS indicate life-threatening.
Underline indicate most frequent.

Interactions

Drug-Drug

None known.

Route/Dosage

Rapidly Progressive LAL Deficiency Presenting within First 6 Months of Age

IV Infants 1 mg/kg once weekly; may ↑ to 3 mg/kg once weekly if suboptimal response achieved.

IV (Adults and Children) 1 mg/kg every other wk.

Availability

Solution for injection: 2 mg/mL

Assessment

• Monitor for signs and symptoms of hypersensitivity reactions (chest discomfort, conjunctival injection, dyspnea, generalized and itchy rash, hyperemia, swelling of eyelids, rhinorrhea, severe respiratory distress, tachycardia, tachypnea, urticaria) during and after infusion. Anaphylaxis has occurred as early as sixth infusion and as late as 1 year after treatment initiation. May pretreat with antipyretics, corticosteroids, and antihistamines. If reaction occurs, decrease infusion rate. If anaphylaxis occurs, discontinue infusion and initiate symptomatic treatment.

Lab Test Considerations:

May cause ↑ circulating LDL-cholesterol (LDL-C) and triglycerides.

Potential Diagnoses

• Deficient knowledge, related to medication regimen (Patient/Family/Teaching)

Implementation

• Intermittent Infusion: Remove solution vials from refrigerator and allow to reach room temperature. Diluent: Dilute with 0.9% NaCl. For 1 mg/kg dose, dilute each mL for 1–10.9 kg in 10 mL, 11–24 kg in 25 mL, 25–49.9 kg in 50 mL, 50–99.9 kg in 100 ml, and 100–120.9 kg in 250 ml. For 3 mg/kg dose, dilute each mL for 1–10.9 kg in 25 mL, 11–24 kg in 50 mL, 25–49.9 kg in 100 mL, 50–99.9 kg in 250 ml, and 100–120.9 kg in 500 ml. Concentration: 0.1 mg/mL to 1.5 mg/mL. Mix gently by inversion; do not shake. Solution is clear to slightly opalescent, colorless to slightly colored and may contain thin, translucent particles or fibers. Do not use solutions that are cloudy or contain other particulate matter. Administer immediately after dilution; diluted solution may be stored up to 24 hrs in refrigerator. Discard unused portions of vials. Infuse via in-line low-protein binding 0.2 micron filter through a low-protein binding infusion set.
• Rate:Infuse over at least 2 hr. Patients receiving 3 mg/kg dose may require longer infusion. A 1 hr infusion may be used in patients who tolerate 1 mg/kg dose.

Patient/Family Teaching

Instruct parent or patient to notify health care professional immediately if signs and symptoms of hypersensitivity reaction (chest tightness; shortness of breath; wheezing; dizziness or faintness; or swelling of face, eyelids, or lips) or if cough or shortness of breath occurs.

Evaluation/Desired Outcomes

• Improved survival in infants.
• Improved lipids in adults and children.