Treatment Options and Standard Care

Because SRP54 deficiency is a multi-system disorder, treatment requires a team approach. There is no single medication that fixes the whole syndrome; instead, doctors focus on managing your child’s specific symptoms and preventing life-threatening infections ^[1][2].

Boosting the Immune System with G-CSF

The first line of defense for the blood aspect of SRP54 deficiency is a medication called G-CSF (Granulocyte Colony-Stimulating Factor) ^[3].

• How it Works: G-CSF is an injection given under the skin that encourages the bone marrow to produce and release more neutrophils ^[4].
• Variable Response: Most children with SRP54 deficiency respond poorly to standard doses ^[5]. However, response is highly individual. Some children (such as those with the p.T117del variant) have shown a very strong response, while others may require very high doses or not respond at all ^[6][7].
• Dosing and Safety: The dose is carefully titrated by your specialist based on your child’s clinical response and infection history ^[4][8]. Never adjust the dose yourself. Common side effects to watch for include bone or muscle pain, headaches, injection-site reactions, and splenic enlargement (which can cause pain in the upper left side of the belly).

Preventing Infections

If your child’s white blood cell count remains very low or if they have a history of frequent infections, your specialist may consider prophylactic antibiotics ^[3]. These are daily, low-dose antibiotics intended to stop bacteria before an infection starts ^[9].

• Note: Prophylactic antibiotics are not automatically given to every child. The decision balances infection history, drug toxicity, and antibiotic resistance ^[3]. They never replace your immediate fever plan—if your child gets a fever, they still need emergency evaluation.

Managing the Pancreas

For children who have exocrine pancreatic insufficiency (EPI), the focus is on nutrition and growth. Not every child with SRP54 deficiency has EPI, so testing is necessary before starting treatment.

• Pancreatic Enzyme Replacement Therapy (PERT): If diagnosed with EPI, your child will need capsules containing digestive enzymes ^[10]. The dosage is calculated based on “lipase units” and your child’s weight. They must be taken with every meal and snack to help absorb fats ^[11][12]. Do not start these without a prescription.
• Nutritional Support: Doctors will monitor your child’s weight, growth trajectory, and levels of fat-soluble vitamins (A, D, E, and K) ^[10][13].

Considering Stem Cell Transplant (HSCT)

A Hematopoietic Stem Cell Transplant (HSCT) is a potentially curative treatment for the hematologic (blood) aspect of the syndrome ^[14]. It replaces the bone marrow with healthy stem cells from a donor.

• When it is Considered: HSCT is usually discussed if the neutropenia does not respond to G-CSF, if there are recurrent life-threatening infections, or if acquired changes in the bone marrow suggest an increased risk of leukemia ^[14][6][4].
• The Reality of HSCT: While HSCT can restore healthy white blood cell counts and may reduce the leukemia risk tied to the abnormal marrow, it carries substantial risks. These include graft-versus-host disease, severe infections, organ toxicity, infertility, and treatment-related mortality. Furthermore, it does not reverse the developmental delays or pancreatic issues, as those are caused by the mutation in other tissues ^[15][16]. The decision is highly individualized and must be made with an expert transplant center.