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Prodrugs

Prodrugs

Prodrugs are a class of pharmaceutical compounds that undergo a biotransformation process within the body to be converted into a pharmacologically active drug. Prodrugs are designed to improve the therapeutic properties of the parent drug, such as enhancing bioavailability, increasing stability, or reducing toxicity. The concept of prodrugs revolves around modifying the chemical structure of the original drug to make it more effective or convenient for administration.
Prodrugs help overcome...

Drug Metabolism: Phase II Reactions

Drug Metabolism: Phase II Reactions

Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists

Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists

Histamine H2 receptors, which are intricately located on the basolateral membrane of parietal cells, play a crucial role in modulating gastric acid secretion. When released from enterochromaffin-like cells, histamine engages H2 receptors, initiating the cyclic AMP (cAMP) pathway. In this pathway, adenylyl cyclase converts ATP into cAMP, elevating intracellular cAMP levels. The activation of protein kinase A follows, stimulating the proton pump. This stimulation prompts the secretion of hydrogen...

Phase II Reactions: Sulfation and Conjugation with α-Amino Acids

Phase II Reactions: Sulfation and Conjugation with α-Amino Acids

Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme...

Amines to Sulfonamides: The Hinsberg Test

Amines to Sulfonamides: The Hinsberg Test

The Hinsberg test is a method to identify primary, secondary and tertiary amines, named after its pioneer, Oscar Hinsberg. Here, amines are treated with benzenesulfonyl chloride, also known as the Hinsberg reagent, in the presence of an excess of aqueous base, followed by acidification. Based on the nature of the amines, different changes are observed.
Generally, a primary amine reacts with the Hinsberg reagent to produce an N-substituted benzenesulfonamide. The electron-withdrawing sulfonyl...

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Related Experiment Video

Updated: Dec 14, 2025

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria

Published on: June 27, 2022

On H₂S Prodrugs.

Gabriel Gojon¹

¹Sulfagenix, Inc., Tucson, Arizona, USA.

Antioxidants & Redox Signaling

|July 22, 2020

Summary

This summary is machine-generated.

Hydrogen sulfide (H₂S) prodrugs are nearing pharmaceutical development for treating various conditions with few side effects. This approach promises to shift from single-target drugs to multitargeted H₂S therapies for complex diseases.

Keywords:

H2S hydrogen sulfide prodrug sulfane sulfur

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Area of Science:

Biomedical Science
Pharmacology
Regenerative Medicine

Background:

Hydrogen sulfide (H₂S) is emerging as a key molecule in therapeutic applications and regenerative medicine.
H₂S prodrugs are advancing in pharmaceutical development, indicating potential for treating a wide array of health conditions.
The traditional "one drug-one target" model may be replaced by multitargeted H₂S prodrugs for complex diseases, potentially reducing polypharmacy.

Discussion:

The Forum explores diverse H₂S donor molecules, release mechanisms, and therapeutic indications.
Related sulfur species like persulfides, SO₂, carbon oxysulfide (COS), and carbon disulfide are also examined.
Insights from 32 international experts are presented, covering pharmacophores and metabolic pathways.

Key Insights:

H₂S-based therapeutics offer a promising new avenue for medical treatment.
Multitargeted H₂S prodrugs could address complex diseases more effectively than single-target drugs.
The development of H₂S prodrugs aims for minimal side effects and disease-modifying outcomes.

Outlook:

H₂S-based therapeutics and regenerative medicine are poised for significant advancement.
A proposed classification of H₂S/COS prodrugs aims to systematize this rapidly growing field.
The future may see expanded roles for H₂S prodrugs in managing complex and chronic diseases.