Related Experiment Video
Updated: Apr 21, 2026
10:49
Doxycycline Loaded Collagen-Chitosan Composite Scaffold for the Accelerated Healing of Diabetic Wounds
Published on: August 21, 2021
5.1K
Targeting the Pathological Microenvironment in Diabetic Foot Ulcers: Advances in Drug Delivery Systems for Improved
Wanqing Dai1, Zhengguang Li2, Rucheng Zheng3
1School of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.
Summary
New therapies target the complex wound environment of diabetic foot ulcers (DFUs). Advanced strategies focus on mechanism-guided interventions to improve healing and reduce recurrence of these challenging diabetes complications.
Area of Science:
- Biomedical Engineering
- Regenerative Medicine
- Diabetes Complications Research
Background:
- Diabetic foot ulcers (DFUs) are severe diabetes complications with poor healing and high amputation rates.
- Pathogenesis involves a hostile wound microenvironment: inflammation, oxidative stress, and immune issues.
- Systemic factors like metabolic disturbance and gut-skin axis dysfunction worsen non-healing.
Purpose of the Study:
- To review recent advances in therapies targeting the DFU microenvironment.
- To highlight mechanism-guided interventions for improved DFU treatment.
- To explore strategies addressing the biological heterogeneity of DFUs.
Main Methods:
- Review of recent literature on advanced DFU therapies.
- Focus on nanocarriers, scaffold platforms, and stimuli-responsive nanomedicine.
- Inclusion of functional biomaterials, cell-free systems, and gut-directed strategies.
Main Results:
- Advanced formulations enable targeted delivery and on-demand therapeutic activation.
- These strategies actively remodel the pathological microenvironment.
- Approaches aim to reduce local and systemic inflammatory and metabolic burdens.
Conclusions:
- Mechanism-guided interventions show promise for DFU treatment.
- Targeting the wound microenvironment offers precise therapeutic potential.
- Tailoring strategies to wound heterogeneity is key for future DFU management.
Related Concept Videos
01:31Diabetic Foot Ulcer
3
Definition A diabetic foot ulcer (DFU) is a chronic, non-healing wound that develops in individuals with diabetes. It typically occurs on pressure-bearing areas such as the heel, metatarsal heads, or hallux, and carries a high risk of infection and amputation.Pathophysiology • The development of DFUs can be explained by four interconnected mechanisms: neuropathy, ischemia, infection, and impaired wound healing. • Neuropathy is the most common factor. Sensory...
3
01:30Modified-Release Drug Delivery Systems: Stimuli-Activated
153
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...
153
01:18Transdermal Drug Delivery Systems
203
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...
203
01:23Modified-Release Drug Delivery Systems: Classification
291
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...
291
01:26Oral Drug Delivery Systems: Continuous-Release Systems
273
Continuous-release drug delivery systems offer a strategic approach to maintaining therapeutic drug levels over extended periods following oral administration. By modulating the release rate of active pharmaceutical ingredients, these systems minimize fluctuations in plasma concentrations, which enhances clinical efficacy and reduces the need for frequent dosing. Such characteristics make them particularly advantageous in managing chronic diseases where patient adherence and stable drug...
273
01:21Intrauterine Drug Delivery Systems
155
Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
155