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Glossary Enzyme Inhibition

reduction or cessation of enzyme activity by specific molecules

Enzyme inhibition refers to the process by which the activity of an enzyme is reduced or stopped. This can occur through various mechanisms, such as competitive inhibition, where an inhibitor molecule competes with the substrate for the active site, or non-competitive inhibition, where the inhibitor binds to a different part of the enzyme, altering its shape and function. Understanding enzyme inhibition is crucial in fields like pharmacology and biochemistry, as it can influence drug design and metabolic regulation.

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Research

5 / 1000+ results

Treatment of Male Rats with Finasteride, an Inhibitor of 5alpha-Reductase Enzyme, Induces Long-Lasting Effects on Depressive-Like Behavior, Hippocampal Neurogenesis, Neuroinflammation, and Gut Microbiota Composition

research Treatment of male rats with finasteride, an inhibitor of 5alpha-reductase enzyme, induces long-lasting effects on depressive-like behavior, hippocampal neurogenesis, neuroinflammation and gut microbiota composition

37 citations , September 2018 in “Psychoneuroendocrinology”

This study found that finasteride treatment in male rats led to enduring effects on depressive-like behavior, hippocampal neurogenesis and neuroinflammation, and gut microbiota composition after withdrawal.

research Effect of the 5α-reductase enzyme inhibitor dutasteride in the brain of intact and parkinsonian mice

16 citations , October 2017 in “Journal of steroid biochemistry and molecular biology/The Journal of steroid biochemistry and molecular biology”

This study found that dutasteride may offer neuroprotection in early-stage Parkinson's disease by preventing loss of striatal dopamine and altering steroid levels in MPTP-lesioned mice.

research Inhibition of Human Steroid 5β-Reductase (AKR1D1) by Finasteride and Structure of the Enzyme-Inhibitor Complex

47 citations , June 2009 in “Journal of Biological Chemistry”

This study found that finasteride competitively inhibits the enzyme AKR1D1 with low micromolar affinity but does not act as a mechanism-based inactivator.

Mechanism-Based Inhibition of Human Steroid 5α-Reductase by Finasteride: Enzyme-Catalyzed Formation of NADP-Dihydrofinasteride, a Potent Bisubstrate Analog Inhibitor

research Mechanism-Based Inhibition of Human Steroid 5α-Reductase by Finasteride: Enzyme-Catalyzed Formation of NADP−Dihydrofinasteride, a Potent Bisubstrate Analog Inhibitor

136 citations , March 1996 in “Journal of the American Chemical Society”

This study explains finasteride's high potency and specificity as a mechanism-based inhibitor for treating benign prostatic hyperplasia by detailing its interaction with human type 2 steroid 5α-reductase.

research GC–MS Profiling, Antioxidant, Enzyme Inhibition, Molecular Docking, and ADME Investigation of the n ‐Hexane Extract and the Essential Oil of Platycladus orientalis (L.) Franco Fruits

January 2026 in “Chemistry & Biodiversity”

This study found that the chemical composition and biological activity of Platycladus orientalis fruit extracts varied with the extraction method, revealing potent antioxidant and enzyme inhibitory properties, particularly in the n-hexane extract, which suggests potential applications for managing dysregulated enzyme conditions.

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Community Join

5 / 726 results

community Did anybody use beta sisterol for hair loss? I saw in many articles in the internet that said that beta sisterol blocks dht by inhibiting 5a reductase type 2 enzyme and some reviews of people who said that it worked better than saw palmetto in terms of stoping hair loss and helping prostate.

in Research/Science 9 upvotes 3 years ago

Beta-sitosterol may inhibit 5-alpha reductase type 2 enzyme, potentially reducing DHT levels and promoting hair growth, similar to finasteride but possibly with fewer side effects. Its effectiveness and side effects compared to other treatments like saw palmetto and finasteride remain uncertain due to limited research.

community Painkillers May Block Minoxidil

12 upvotes 1 year ago

Painkillers like Aspirin may reduce Minoxidil's effectiveness by inhibiting the enzyme PGHS-1, which is crucial for hair growth. Using NSAIDs that inhibit COX-2 or combining Minoxidil with PGF2/E2 analogues or retinoids may enhance its efficacy.

community Has anyone here tried taking GLA supplements?

1 upvotes 1 year ago

GLA may help with hair loss due to its anti-inflammatory properties and 5ar enzyme inhibition. It's considered potentially more important than biotin, especially for those already using finasteride and dutasteride.

community How does some people revive their scalps with minoxidil only?

in Minoxidil 26 upvotes 2 years ago

Some people respond better to minoxidil due to higher enzyme levels converting it to its active form. Minoxidil helps with hair regrowth but doesn't prevent hair loss; finasteride and other DHT inhibitors are needed for that.

community Be careful when switching from Finasteride to Dutasteride because for more efficacy.

in Finasteride/Dutasteride 13 upvotes 1 year ago

Switching from finasteride to dutasteride may be more effective for hair regrowth due to dutasteride's stronger enzyme inhibition, but combining both drugs could enhance results. Some users report better outcomes with dutasteride, while others recommend a gradual transition to prevent potential hair loss.

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Learn

7 / 801 results

learn procapil

Want to stop hormonal hair loss without touching your hormone levels? Procapil could block the enzyme doing the damage. Procapil's supplier describes it as inhibiting 5-alpha reductase at the scalp without changing hormone levels, but the published support is cell and animal work plus one small human study of a caffeine-plus-Procapil formula. It is a cosmetic ingredient, not an approved hair-loss treatment, and no trial has compared it with finasteride or minoxidil.

learn Ecklonia Cava

How does Ecklonia Cava help slow down hair loss in people with androgenetic alopecia? Ecklonia cava may slow hair loss by inhibiting the enzyme that converts testosterone to DHT.

learn Baricitinib

JAK inhibitor that reduces inflammation and immune attacks on hair follicles, leading to potential hair regrowth, especially in alopecia areata cases

learn Tofacitinib

a JAK inhibitor for alopecia areata and other autoimmune conditions

learn Valproic acid

an anticonvulsant repurposed for hair loss via histone inhibition

learn Finasteride

Frontline, gold standard treatment for combatting androgenic alopecia

learn Dutasteride

Heavy duty finasteride that comes with higher risks

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