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Related Concept Videos

Vaccinations01:51

Vaccinations

Overview
Routes of Drug Administration: Parenteral01:25

Routes of Drug Administration: Parenteral

The administration of drugs via parenteral routes allows for direct drug introduction into the systemic circulation, resulting in high bioavailability because the medication bypasses the harsh conditions of the gastrointestinal tract and hepatic metabolism.
The intravenous route (IV) of drug administration can be further categorized into two types. The bolus injection administers the entire dose rapidly, while an intravenous infusion slowly delivers smaller doses steadily.
The IV route is often...
Active versus Passive Immunity01:31

Active versus Passive Immunity

Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...
Drug Delivery: Parenteral Route01:29

Drug Delivery: Parenteral Route

The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
Drug Delivery: Miscellaneous Routes01:22

Drug Delivery: Miscellaneous Routes

Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
Oral inhalation and nasal sprays swiftly transfer drugs across the respiratory epithelium's mucosal layer. Inhaled glucocorticoids and bronchodilators directly target lung conditions such as asthma, while fluticasone nasal spray mitigates allergic rhinitis.
Transdermal patches transport drugs through the...
Transdermal Drug Delivery Systems01:18

Transdermal 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...

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Related Experiment Video

Updated: Jul 24, 2026

Skin Tattooing As A Novel Approach For DNA Vaccine Delivery
06:37

Skin Tattooing As A Novel Approach For DNA Vaccine Delivery

Published on: October 18, 2012

Transcutaneous immunization: a human vaccine delivery strategy using a patch.

G M Glenn1, D N Taylor, X Li

  • 1Department of Membrane Biochemistry, Walter Reed Army Institute of Research, 503 Robert Grant Rd., Rm. 2W-124, Silver Spring, Maryland 20910-7500, USA.

Nature Medicine
|December 2, 2000
PubMed
Summary

Transcutaneous immunization (TCI) offers a needle-free vaccine delivery method targeting the skin. This study shows TCI using a heat-labile enterotoxin (LT) patch is safe and effective in humans, inducing strong antibody responses.

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Area of Science:

  • Immunology
  • Vaccinology
  • Dermatology

Background:

  • Transcutaneous immunization (TCI) is a needle-free topical vaccine delivery method.
  • The skin's immune-rich environment is targeted for enhanced vaccine responses.
  • Previous animal studies demonstrated TCI's ability to induce robust systemic and mucosal antibodies.

Purpose of the Study:

  • To evaluate the safety and immunogenicity of TCI in humans.
  • To assess the induction of antibody responses against heat-labile enterotoxin (LT) using a TCI patch.
  • To explore the potential of TCI for improved vaccine delivery and efficacy in humans.

Main Methods:

  • Human subjects received a topical patch containing heat-labile enterotoxin (LT).
  • Safety of the TCI patch application was monitored.
  • LT-specific antibody responses were measured to assess immunogenicity.

Main Results:

  • Transcutaneous immunization with the LT-containing patch was demonstrated to be safe for human application.
  • Robust LT-antibody responses were successfully induced in human participants.
  • The study confirmed the feasibility of TCI for human immunization.

Conclusions:

  • Transcutaneous immunization is a safe and feasible method for human vaccination.
  • TCI can elicit significant antibody responses, suggesting potential for enhanced vaccine efficacy.
  • This needle-free approach offers a promising alternative for vaccine delivery.