Critical points in the management of intratumoral treatments in oncology clinical trials

Author(s)

Lorena Garcia Basas, Pablo Latorre Garcia, Eugenia Serramontmany Morante, Patricia Garcia Ortega, Pilar Rovira Torres, Laura Maños Pujol, Isabel Cidoncha Muñoz, Maria Queralt Gorgas Torner

Why was it done?

Increasing number of CT with IT, in different pathologies, with different tumor locations, contributes an increase in the complexity of drug compounding and procedures. Their preparation, administration and handling requirements differ from current therapies.

What was done?

Identification of critical points concerning intratumoral treatments (IT) preparation in patients with cancer included in clinical trials (CT).

How was it done?

Ongoing CT with IT in our unit were reviewed to identify critical points regarding prescription and preparation process. 14 trials with IT, 8 (57%) of which have ongoing patients were identified. Two of these trials are “first in human”. The critical points were:

• Nature of the IT: virus (4, 29%), nanoparticles (3, 21%), ribonucleic acid (2, 14%), cyclic dinucleotides (2, 14%), monosaccharides (1, 7%), phospholipids (1, 7%) and proteins (1,7%).Particularly, virus have special safety measures and transport conditions
• Dosing units: mcg (4, 29%), plaque-forming unit/mL (PFU/mL)(3, 21%), mL (3, 21%), mg (2 14%), ng (1, 7%), 50% Tissue Culture Infectious Dose (TCID50)(1, 7%).
•  Prior dilution before filling the syringe: 8 (57%) of our preparations require at least one prior dilution.
•  Drug volume to prepare according to the tumor size: 8 (57%) IT preparations depend on the tumor size.
•  Depending on the depth of the target tumor lesion (visceral or superficial), different size of needle is required. This is important because different priming volumes of the needles are necessary.

What has been achieved?

The whole information necessary for a complete prescription, validation and correct preparation goes further than information usually needed for current therapies such as chemotherapy. The results of the study of the critical points allow us to elaborate the standardized operational procedures (SOP) for each CT and IT.  These SOPs include the necessary information for a correct preparation for each IT, reducing risk of mistakes and achieving uniformity in the process.

What next?

These types of therapies represent a challenge, and pharmacists have an important role in developing new procedures. Communication between radiology, oncology and pharmacy departments in a multidisciplinary teamwork is essential. This information may be useful to other centers due to the lack of experience and SOPs to work with this type of therapy.