Related Experiment Video
Updated: Jun 16, 2026
13:36
Utilizing the Antigen Capsid-Incorporation Strategy for the Development of Adenovirus Serotype 5-Vectored Vaccine Approaches
Published on: May 6, 2015
10.5K
Polyphosphazene: A New Adjuvant Platform for Cocaine Vaccine Development.
Mingliang Lin1, Alexander Marin2, Beverly Ellis1
1Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States.
Molecular Pharmaceutics
|August 19, 2022
Summary
A novel synthetic polymer, polyphosphazene macromolecule (PCEP), enhances cocaine vaccines by increasing antibody response. This PCEP-cocaine vaccine effectively reduces cocaine
Area of Science:
- Immunopharmacology
- Vaccine Development
- Neuroscience
Background:
- Cocaine use disorder lacks approved therapeutics, necessitating new treatment strategies.
- Immunopharmacotherapeutics, using active vaccination to generate antibodies, show promise but face limitations in antibody induction levels.
- Existing cocaine vaccines require improved adjuvant systems for enhanced efficacy.
Purpose of the Study:
- To evaluate a novel adjuvant system comprising a polyphosphazene macromolecule, poly[di(carboxylatoethylphenoxy)-phosphazene] (PCEP), for improved cocaine conjugate vaccine delivery and performance.
- To assess the efficacy of a PCEP-based cocaine vaccine, particularly when combined with CpG oligodeoxynucleotide (ODN) and administered intranasally.
Main Methods:
- Exploration of PCEP's assembling efficiency with a cocaine hapten and CpG ODN.
- Assessment of antibody titers, affinity, and immune balance in response to the PCEP-cocaine conjugate vaccine.
- Measurement of cocaine sequestering in blood and brain, and reduction in locomotor activity.
- Evaluation of intranasal vaccine administration, including mucosal IgA production.
Main Results:
- PCEP demonstrated superior assembling efficiency with the cocaine hapten and CpG ODN.
- The PCEP-CpG combination induced a significantly higher antibody titer response and balanced immunity.
- The vaccine successfully sequestered cocaine in the blood, reducing its presence in the brain.
- Intranasal administration of the PCEP-cocaine vaccine showed efficacy in antibody titer, affinity, mucosal IgA, and reduced locomotor activity.
Conclusions:
- The PCEP adjuvant system represents a significant advancement in developing effective cocaine vaccines.
- This synthetic adjuvant enhances antibody production and reduces cocaine's central nervous system effects.
- PCEP-integrated cocaine vaccines, including via intranasal delivery, offer a promising new avenue for treating cocaine use disorder.
Related Concept Videos
00:59COP Coated Vesicles
Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of different...
01:27Pharmaceutical Alternatives: Polymorphic Form-Related and Particle Size-Related Therapeutic Nonequivalence
Changes in polymorphic forms can significantly influence the bioavailability of poorly soluble drugs. Although the FDA defines pharmaceutical equivalence based on having the same active ingredient, dosage form, and route of administration, it does not automatically disqualify products with different polymorphic forms. This means two products with different polymorphs can still be deemed pharmaceutically equivalent. However, polymorphic differences can affect properties like wettability,...
01:30Modified-Release Drug Delivery Systems: Stimuli-Activated
Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...
01:24Site-Targeted Drug Delivery Systems: Polymeric Carriers
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
01:23Vaccine Production
Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...