In LOPD, damage is caused by glycogen accumulation1
Late-onset Pompe disease (LOPD) is an autosomal recessive condition caused by pathogenic variants in the acid alpha glucosidase (GAA) gene, resulting in GAA enzyme deficiency. GAA enzyme deficiency leads to impaired lysosomal glycogen breakdown.
Glycogen accumulation occurs as a result of GAA enzyme deficiency2
ROLE OF M6P PATHWAY IN ROUTING GAA ENZYME TO THE LYSOSOME:
In the trans-golgi, GAA enzyme with M6P tag binds to M6P receptor (M6PR).
ROLE OF M6P PATHWAY IN ROUTING GAA ENZYME TO THE LYSOSOME:
Within the late endosome/lysosome, low pH environment causes dissociation of M6PR and GAA enzyme.
ROLE OF M6P PATHWAY IN ROUTING GAA ENZYME TO THE LYSOSOME:
GAA enzyme is taken up in lysosome via vesicular transport, where the enzyme breaks down glycogen.
In Pompe, GAA deficiency results in lysosomal glycogen accumulation, causing muscle damage throughout the body.
Over time, glycogen accumulation can cause irreversible decline in1,3,4:
Breathing ability due to respiratory muscle weakness
Walking ability due to muscle weakness
The goal of treating LOPD is the improvement or stabilization of breathing and walking.1
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WARNING: SEVERE HYPERSENSITIVITY REACTIONS, INFUSION-ASSOCIATED REACTIONS, and RISK OF ACUTE CARDIORESPIRATORY FAILURE IN SUSCEPTIBLE PATIENTS Hypersensitivity Reactions including Anaphylaxis Patients treated with NEXVIAZYME have experienced life-threatening hypersensitivity reactions, including anaphylaxis. Appropriate medical support measures, including cardiopulmonary resuscitation equipment, should be readily available during NEXVIAZYME administration. If a severe hypersensitivity reaction (e.g., anaphylaxis) occurs, NEXVIAZYME should be discontinued immediately and appropriate medical treatment should be initiated. In patients with severe hypersensitivity reaction, a desensitization procedure to NEXVIAZYME may be considered. Infusion-Associated Reactions (IARs) Patients treated with NEXVIAZYME have experienced severe IARs. If severe IARs occur, consider immediate discontinuation of NEXVIAZYME, initiation of appropriate medical treatment, and the benefits and risks of readministering NEXVIAZYME following severe IARs. Patients with an acute underlying illness at the time of NEXVIAZYME infusion may be at greater risk for IARs. Patients with advanced Pompe disease may have compromised cardiac and respiratory function, which may predispose them to a higher risk of severe complications from IARs. Risk of Acute Cardiorespiratory Failure in Susceptible Patients Patients susceptible to fluid volume overload, or those with acute underlying respiratory illness or compromised cardiac or respiratory function for whom fluid restriction is indicated may be at risk of serious exacerbation of their cardiac or respiratory status during NEXVIAZYME infusion. More frequent monitoring of vitals should be performed during NEXVIAZYME infusion. |
WARNINGS AND PRECAUTIONS
Hypersensitivity Reactions Including Anaphylaxis: See Boxed WARNING. Prior to NEXVIAZYME administration, consider pretreating with antihistamines, antipyretics, and/or corticosteroids. The risks and benefits of readministering NEXVIAZYME following severe hypersensitivity reaction (including anaphylaxis) should be considered. If a mild or moderate hypersensitivity reaction occurs, the infusion rate may be slowed or temporarily stopped.
Infusion-Associated Reactions: See Boxed WARNING. IARs may still occur in patients after receiving pretreatment. If mild or moderate IARs occur regardless of pretreatment, decreasing the infusion rate or temporarily stopping the infusion may ameliorate the symptoms.
Risk of Acute Cardiorespiratory Failure in Susceptible Patients: See Boxed WARNING.
ADVERSE REACTIONS
The most common adverse reactions (>5%) were headache, fatigue, diarrhea, nausea, arthralgia, dizziness, myalgia, pruritus, vomiting, dyspnea, erythema, paresthesia and urticaria.
INDICATION
NEXVIAZYME (avalglucosidase alfa-ngpt) is indicated for the treatment of patients 1 year of age and older with late-onset Pompe disease [lysosomal acid alpha-glucosidase (GAA) deficiency].
Please see full Prescribing Information for complete details, including Boxed WARNING.
References: 1. Llerena Junior JC, Nascimento OJ, Oliveira AS, et al. Arq Neuropsiquiatr. 2016;74(2):166-176. 2. Desnick R, Schuchman E. Nat Rev Genet. 2002;3(12):954-966. 3. American Association of Neuromuscular & Electrodiagnostic Medicine. Muscle Nerve. 2009;40(1):149-160. 4. Kishnani PS, Steiner RD, Bali D, et al. Genet Med. 2006;8(5):267-288.
|
WARNING: SEVERE HYPERSENSITIVITY REACTIONS, INFUSION-ASSOCIATED REACTIONS, and RISK OF ACUTE CARDIORESPIRATORY FAILURE IN SUSCEPTIBLE PATIENTS Hypersensitivity Reactions including Anaphylaxis Patients treated with NEXVIAZYME have experienced life-threatening hypersensitivity reactions, including anaphylaxis. Appropriate medical support measures, including cardiopulmonary resuscitation equipment, should be readily available during NEXVIAZYME administration. If a severe hypersensitivity reaction (e.g., anaphylaxis) occurs, NEXVIAZYME should be discontinued immediately and appropriate medical treatment should be initiated. In patients with severe hypersensitivity reaction, a desensitization procedure to NEXVIAZYME may be considered. Infusion-Associated Reactions (IARs) Patients treated with NEXVIAZYME have experienced severe IARs. If severe IARs occur, consider immediate discontinuation of NEXVIAZYME, initiation of appropriate medical treatment, and the benefits and risks of readministering NEXVIAZYME following severe IARs. Patients with an acute underlying illness at the time of NEXVIAZYME infusion may be at greater risk for IARs. Patients with advanced Pompe disease may have compromised cardiac and respiratory function, which may predispose them to a higher risk of severe complications from IARs. Risk of Acute Cardiorespiratory Failure in Susceptible Patients Patients susceptible to fluid volume overload, or those with acute underlying respiratory illness or compromised cardiac or respiratory function for whom fluid restriction is indicated may be at risk of serious exacerbation of their cardiac or respiratory status during NEXVIAZYME infusion. More frequent monitoring of vitals should be performed during NEXVIAZYME infusion. |
WARNINGS AND PRECAUTIONS
Hypersensitivity Reactions Including Anaphylaxis: See Boxed WARNING. Prior to NEXVIAZYME administration, consider pretreating with antihistamines, antipyretics, and/or corticosteroids. The risks and benefits of readministering NEXVIAZYME following severe hypersensitivity reaction (including anaphylaxis) should be considered. If a mild or moderate hypersensitivity reaction occurs, the infusion rate may be slowed or temporarily stopped.
Infusion-Associated Reactions: See Boxed WARNING. IARs may still occur in patients after receiving pretreatment. If mild or moderate IARs occur regardless of pretreatment, decreasing the infusion rate or temporarily stopping the infusion may ameliorate the symptoms.
Risk of Acute Cardiorespiratory Failure in Susceptible Patients: See Boxed WARNING.
ADVERSE REACTIONS
The most common adverse reactions (>5%) were headache, fatigue, diarrhea, nausea, arthralgia, dizziness, myalgia, pruritus, vomiting, dyspnea, erythema, paresthesia and urticaria.
INDICATION
NEXVIAZYME (avalglucosidase alfa-ngpt) is indicated for the treatment of patients 1 year of age and older with late-onset Pompe disease [lysosomal acid alpha-glucosidase (GAA) deficiency].
Please see full Prescribing Information for complete details, including Boxed WARNING.
References: 1. Llerena Junior JC, Nascimento OJ, Oliveira AS, et al. Arq Neuropsiquiatr. 2016;74(2):166-176. 2. Desnick R, Schuchman E. Nat Rev Genet. 2002;3(12):954-966. 3. American Association of Neuromuscular & Electrodiagnostic Medicine. Muscle Nerve. 2009;40(1):149-160. 4. Kishnani PS, Steiner RD, Bali D, et al. Genet Med. 2006;8(5):267-288.