Congenital neutropenic disorders and primary immunodeficiencies (PIDs) are a group of rare genetic conditions characterized by an impaired immune system, which makes individuals highly susceptible to infections. One specific type of PID is WHIM syndrome, an acronym for Warts, Hypogammaglobulinemia, Infections, and Myelokathexis. This condition involves a range of symptoms including severe warts, reduced levels of immune antibodies, recurrent bacterial infections, and myelokathexis— a unique phenomenon where neutrophils (a type of white blood cell essential for fighting infections) fail to exit the bone marrow properly. These disorders result from genetic mutations that affect the cells and proteins of the immune system, leading to chronic, often severe, infectious diseases.
Genetic testing plays a key role in the diagnosis and management of primary immunodeficiencies (PIDs) and congenital neutropenic disorders, such as WHIM syndrome. By pinpointing specific genetic mutations, it provides definitive diagnoses, distinguishing these disorders from other conditions with similar symptoms and informing targeted therapeutic strategies. This precision is crucial for implementing effective treatments.
Additionally, genetic testing facilitates earlier and more accurate interventions, potentially improving prognosis and quality of life. It also enables family screening, offering crucial information for family planning and identifying at-risk relatives who may benefit from early treatment and surveillance.
What is the Program?
PATH4WARD is a no-charge genetic testing program sponsored by X4 Pharmaceuticals in partnership with Invitae, intended to help diagnose patients suspected of having a congenital neutropenic disorder or a primary immunodeficiency (PID), including WHIM syndrome. The program includes genetic counseling for patients and/or clinicians, as well as family variant testing when applicable.
The no-charge PATH4WARD genetic testing program is available to US patients who have all three (3) of the following criteria:
1. Suspicion of a congenital neutropenic disorder or a primary immunodeficiency.
2. Any prior history or a current absolute neutrophil count (ANC) ≤ 1,000 cells/µL on multiple occasions that is not related to drugs or chemotherapy or secondary to viral infection.
3. One or more of the following:
Collect your patient’s specimen using an Invitae collection kit and return it. Use the label provided to ship most samples at no additional charge from the US and Canada.
X4 is delivering progress for patients by developing and commercializing innovative therapies for those with rare diseases of the immune system and significant unmet needs. Leveraging our expertise in CXCR4 and immune system biology, we have successfully developed mavorixafor, which has received U.S. approval as XOLREMDI™ (mavorixafor) capsules in its first indication. We are also evaluating the use of mavorixafor in additional potential indications. X4 corporate headquarters are in Boston, Massachusetts and our research center of excellence is in Vienna, Austria. For more information, please visit our website at www.x4pharma.com.