What is MPS VII?
What is MPS VII?
Mucopolysaccharidosis VII (MPS VII or Sly syndrome) is a lysosomal disorder characterized by the deficiency of a certain enzyme called ß-glucuronidase (also called GUS). This deficiency results in accumulation of glycosaminoglycans, or GAGs, in cells throughout the body, leading to multisystem tissue and organ damage.
What is MPS VII?
Mucopolysaccharidosis VII (MPS VII or Sly syndrome) is a lysosomal disorder characterized by the deficiency of a certain enzyme called ß-glucuronidase (also called GUS). This deficiency results in accumulation of glycosaminoglycans, or GAGs, in cells throughout the body, leading to multisystem tissue and organ damage.
MPS VII is one of the 7 main types of MPS. All MPS disorders are caused by enzyme shortages that lead to GAG accumulation in cells throughout the body.
What is MPS VII?
MPS VII is one of the 7 main types of MPS. All MPS disorders are caused by enzyme shortages that lead to GAG accumulation in cells throughout the body.
GAGs, or glycosaminoglycans, are long chains of sugar molecules
that build up in the cells of organs and tissues in patients with MPS VII
Healthy Cell

Glycosaminoglycans (GAGs) are contained within a certain part of the cell called lysosomes.
Diseased Cell

GAGs accumulate in cells throughout the body, affecting many systems, including
• bones
• tissues
• organs
MPS VII can lead to debilitating and progressive multi-organ dysfunction.
MPS VII can lead to debilitating and progressive multi-organ dysfunction
MPS VII can lead to debilitating and progressive multi-organ dysfunction
- A severe allergic reaction called anaphylaxis has occurred with MEPSEVII treatment, as early as the first dose.
- Your healthcare provider will monitor you closely for symptoms of an allergic reaction while you are receiving MEPSEVII and for 60 minutes after your infusion.
- Your healthcare provider will immediately discontinue the MEPSEVII infusion if you experience anaphylaxis.
- Your healthcare provider should talk to you about the signs and symptoms of anaphylaxis and about getting immediate medical treatment if you have symptoms.
- The most common side effects of MEPSEVII are:
- Leakage of MEPSEVII into the surrounding tissue during infusion
- Diarrhea
- Rash
- Severe allergic reaction (anaphylaxis)
- Infusion site swelling
- Swelling around the infusion site
- Severe itching of the skin
- One patient experienced a seizure during a fever while taking MEPSEVII.
- are pregnant, think you may be pregnant, or plan to become pregnant. There is not enough experience to know if MEPSEVII may harm your unborn baby.
- are breastfeeding or plan to breastfeed. There is not enough experience to know if MEPSEVII passes into your breast milk. Talk with your healthcare provider about the best way to feed your baby while you receive MEPSEVII.
These are not all the possible side effects of MEPSEVII. Call your healthcare provider for medical advice about side effects.