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The role of hospital pharmacists in gene therapy preparation

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European Statement

Production and Compounding

Author(s)

Lucija Tominović Gjivić, Gabrijela Kos, Anita Šimić

Why was it done?

In order to ensure correct use of voretigene neparvovec and minimise the risks associated with its administration, the product can be distributed only through treatment centres where qualified staff (vitreoretinal surgeons and pharmacists) have participated in the mandatory risk management plan (RMP) education program required by EMA.
Since voretigene neparvovec has to be transported and stored frozen at ≤-65 ºC, has short shelf life after dilution (4 hours), contains genetically modified organisms and must be handled according to local biosafety guidelines, there was a need for establishing standard operating procedures (SOPs) for each step of the treatment process.

What was done?

The University Eye Clinic, University Hospital Sveti Duh in Zagreb, Croatia, was designated as the world’s 6th gene therapy centre in 2020.
Hospital pharmacists, as part of a multidisciplinary team, play an important role in preparation and administration of the gene therapy product voretigene neparvovec which is indicated for the treatment of patients with vision loss due to inherited retinal dystrophy caused by biallelic RPE65 (retinal pigment epithelium-specific 65 kilodalton protein) mutations.

How was it done?

The multidisciplinary team consists of a paediatric ophthalmologist, an inherited retinal disease specialist, retinal surgeons, pharmacists and nurses.
SOPs were created for: ordering process, storage of the product, coordination between members of the multidisciplinary team, preparation of the product, administration and disposal of waste.
Preparation of voretigene neparvovec is performed under aseptic conditions in a Class II vertical laminar flow biological safety cabinet (BSC) according to Pharmacy Manual which was ensured by the manufacturer.

What has been achieved?

Since 2020. there had been 47 dose applications of voretigene neparvovec (26 patients, Croatian and nonCroatian citizens).
The prevalence of inherited retinal dystrophy associated with biallelic RPE65 mutation is 1:200 000 and it is expected that there are 19 individuals (population of 3,8, million) with biallelic RPE65 mutation in Croatia, and 13 of them were detected since 2020.
There were no registered side effects which could be associated with errors during the preparation or administration of voretigene neparvovec.

What next?

With the increasing number of gene and cell-based therapies, the need for continuous education of hospital pharmacists and exchange their experiences is greater than ever.

Hospital pharmacists contribute to a safe and efficient use of chimeric antigen receptor T cell drugs.

European Statement

Selection, Procurement and Distribution

Author(s)

José Luis Revuelta Herrero, Vicente Escudero, Roberto Collado, Belén Marzal, Ana Herranz, María Sanjurjo

Why was it done?

CAR-T cell-based therapies are advanced therapy medicinal products (ATMP) that are considered as drugs by the European regulatory authorities. ATMPs are usually associated with strong logistic and traceability requirements, serious adverse events and a high budget impact. Hospital pharmacists can help ensure a safe and efficient use of these drugs.

What was done?

A chimeric antigen receptor (CAR) T cell Therapy Committee was created in 2019 and it included members from the hematology, oncology, pediatric onco-hematology, hospital pharmacy, neurology, critical care medicine and immunology departments. An operating procedure defined the specific functions of the pharmacy department in the management of these drugs in the CAR-T cell program.

How was it done?

As some responsibilities might be shared with other professionals, it was key to define everyone’s contributions. In our case, an operating procedure with the responsibilities of the pharmacy department was developed based on the national and regional action plans for ATMPs in the national health system and the risk management plans for each drug. This operating procedure was reviewed and approved by the Committee.

What has been achieved?

The operating procedure was fully implemented and included the participation of hospital pharmacists in the following steps:
• Procurement: the inclusion of a patient in the program is agreed upon the Committee. The pharmacists provide a purchase order when all the requirements are met.
• Leukapheresis and shipment to the manufacturer: the apheresis is included in the computerized physician order entry (CPOE) and it is verified to confirm wash-out periods. Before the shipment, the pharmacists record the apheresis unique identifier and patient data.
• Product receipt: the pharmacists verify at receipt that the patient identity chain and the integrity of the product have been preserved.
• Bridge and lymphodepleting chemotherapy, CAR-T administration: specific protocols have been included in the CPOE. Prescriptions are verified by the pharmacists with special attention to the drug-free periods. After transporting the drug to the clinical unit and preparation, a pharmacy label for dispensing and administration is generated. This label includes a barcode for patient identity verification at bedside.
• Outcomes monitoring and pharmacovigilance: kits are provided to the clinical units for the management of CAR-T associated toxicities. Pharmacists are responsible for the adverse reactions reporting in coordination with clinicians.

What next?

We developed verification lists for each of the previous steps that have already been published (DOI: 10.3389/fonc.2021.636068). More ATMPs are expected to come and their management will require the participation of hospital pharmacists from different areas of expertise (procurement, clinical pharmacy, compounding etc).

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