Related Experiment Video
Updated: May 28, 2026
16:19
Synthesis, Cellular Delivery and In vivo Application of Dendrimer-based pH Sensors
Published on: September 10, 2013
Thermosensitive dendrimer formulation for drug delivery at physiologically relevant temperatures
Annie Castonguay1, Eleanor Wilson, Noura Al-Hajaj
1Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 2K6, Canada.
Chemical Communications (Cambridge, England)
|October 14, 2011
Summary
This study introduces a novel dendrimer platform for drug delivery. The formulation releases therapeutic agents, like lipoic acid, at body temperature, protecting cells from inflammation and oxidative stress.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Drug Delivery Systems
Background:
- Therapeutic agent delivery often faces challenges with stability and targeted release.
- Developing stimuli-responsive systems for controlled drug release is crucial for effective treatment.
- Oxidative stress and inflammation are key factors in various disease pathologies.
Purpose of the Study:
- To report a simple and versatile dendrimer-based platform for therapeutic agent delivery.
- To investigate the temperature-triggered release of lipoic acid from thermosensitive dendrimers.
- To evaluate the protective effects of the formulation against oxidative stress and endotoxic agents.
Main Methods:
- Synthesis of thermosensitive dendrimers with peripheral lipoic acid conjugation.
- In vitro release studies of lipoic acid at physiological temperatures (37-42 °C).
- Cell-based assays to assess protection against oxidative stress and pro-inflammatory endotoxic agents.
Main Results:
- A versatile dendrimer platform capable of releasing therapeutic agents within the physiological temperature range was developed.
- Sustained release of lipoic acid was observed from the thermosensitive dendrimer formulations at 37-42 °C.
- The lipoic acid-loaded dendrimers demonstrated efficacy in rescuing cells from oxidative stress and a pro-inflammatory endotoxic agent.
Conclusions:
- The developed dendrimer platform offers a promising approach for localized and controlled drug delivery.
- Thermosensitive dendrimers can be engineered for sustained release of therapeutic agents at body temperature.
- This platform shows potential for mitigating cellular damage caused by oxidative stress and inflammation.
More Related Videos
07:47Custom-designed Laser-based Heating Apparatus for Triggered Release of Cisplatin from Thermosensitive Liposomes with Magnetic Resonance Image Guidance
Published on: December 13, 2015
09:11Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release
Published on: February 13, 2016
Related Concept Videos
01:18Transdermal Drug Delivery Systems
Transdermal drug delivery systems (TDDS) enable the controlled release of drugs across the skin into systemic circulation. They are particularly advantageous for drugs with short half-lives or narrow therapeutic indices, as they maintain consistent plasma concentrations and reduce the risk of subtherapeutic or toxic levels.TDDS are categorized into monolithic, reservoir, and mixed systems. Monolithic systems embed the drug in a polymer matrix, where diffusion governs release. Reservoir systems...
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...
01:23Modified-Release Drug Delivery Systems: Classification
Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
01:43Thermosensation
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
01:24Modified-Release Drug Delivery Systems: Site-Targeted
Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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...