Thermostable Subunit Vaccines for Pulmonary Delivery: How Close Are We?
Curr Pharm Des
; 22(17): 2561-76, 2016.
Article
in En
| MEDLINE
| ID: mdl-26831645
ABSTRACT
In the past century, vaccines have contributed to a significant improvement in global public health by preventing a number of infectious diseases. Despite this, the vaccine field is still facing challenges related to incomplete vaccine coverage and persistent difficult vaccine targets, such as influenza, tuberculosis, and Ebola, for which no good universal vaccines exist. At least two pharmaceutical improvements are expected to help filling this gap i) The development of thermostable vaccine dosage forms, and ii) the full exploitation of the adjuvant technology for subunit vaccines to potentiate strong immune responses. This review highlights the status and recent advances in formulation and pulmonary delivery of thermostable human subunit vaccines. Such vaccines are very appealing from compliance, distribution and immunological point of view Being non-invasive, inhalable vaccines are self-administrable, can be distributed independently of functioning freezers and refrigerators, and can be designed to induce mucosal and/or cell-mediated immunity, which is attractive for a number of diseases requiring stimulation of local mucosal immunity for protection. However, the design and delivery of thermostable dry powder-based vaccines represents a technological challenge It calls for careful formulation and dosage form design, combined with cheap and efficient delivery devices, which must be engineered via a thorough understanding of the physiological barrier and the requirements for induction of mucosal immunity. Here, I review state of the art and perspectives in formulation design and processing methods for powder-based subunit vaccines intended for pulmonary administration, and present dry powder inhaler technologies suitable for translating these vaccines into clinical trials.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Temperature
/
Drug Delivery Systems
/
Vaccines, Subunit
/
Dry Powder Inhalers
/
Lung
Limits:
Humans
Language:
En
Journal:
Curr Pharm Des
Journal subject:
FARMACIA
Year:
2016
Document type:
Article
Affiliation country:
Denmark