Do you know anything about usnic acid

What Is Usnic Acid?

Usnic Acid is one of the most important and widely distributed lichenic acids, also known as lichenic acid, which is mainly found in many species of Pinoconia, Dendrohairia, Dendrofloris, Platycladus, Insula, Litmus, Meliaceae, Camphorus, and Rumex. The content of lichens in Pinoconaceae, Meliaceae and Litmus generally occupies 0.1-4% of the dry body weight of lichens in litmus. The content is 8% in Alectori aochroleuca.

It is reported that in the 1960s, the former Soviet Union made usnic acid into various formulations, widely used in the treatment of wounds, burns, chapping and other diseases. Due to its strong antibacterial, anti-radiation, anti-corrosion and other effects, usnic acid has been used in medicine, perfume, cosmetics and other industries, and as a pure substance added to toothpaste, mouthwash, deodorant, sunscreen and weight loss products.

In nature, usnic acid exists in two enantiomers and is chemically stable, soluble in chloroform, insoluble in hot ethanol and water. In different organic solvents, usnic acid presents different crystal forms, such as yellow rhombic prism crystal in acetone solution, and needle crystal in chloroform ethanol mixture or benzene solution. It is generally considered to occur only in lichen as a secondary metabolite produced by lichen symbiotic bacteria, but it has also been reported to be isolated from plant pathogenic fungi and non-lichen ascomyces. Because usnic acid is widely distributed in lichen, and easy to isolate and purify. Since its development, a series of bioactivity studies have been carried out around usnic acid, and it has been found that the compound has significant activities in antioxidant, anti-cell proliferation, cytotoxic, antibacterial, antiviral, anti-inflammatory and other aspects.

What Are The Functions Of Usnic Acid?

1.Antioxidant: Usnicacid is a powerful antioxidant, which has the effect of scavenging free radicals and reducing oxidative stress. The accumulation of free radicals in the body is closely related to the occurrence and development of many diseases, such as cardiovascular disease, cancer and neurodegenerative diseases. The antioxidant properties of usnicacid have led to its use in pharmaceuticals to develop antioxidants and treatments to prevent disease.

2.Anti-inflammatory effect: Usnicacid shows a significant anti-inflammatory effect, which can inhibit the inflammatory response and the release of inflammation-related cytokines. This has led to a wide range of pharmaceutical applications in the development of anti-inflammatory drugs and the treatment of inflammatory diseases such as arthritis, inflammatory bowel disease and allergic reactions.

3.Antibacterial and antiviral activity: Usnicacid has certain antibacterial and antiviral activity, which can inhibit the growth and replication of a variety of pathogenic microorganisms. This has led to its use in pharmaceuticals to develop antibacterial and antiviral drugs for the treatment of infectious diseases and to prevent the spread of diseases.

What Is The Application Of Usnic Acid?

‌Usnic acid is widely used in many fields, including medicine, cosmetics, environmental monitoring and so on. ‌

‌Pharmaceutical field ‌

Usnic acid has antibacterial, anti-inflammatory, hemostatic, enhance immunity and other pharmacological effects, for a variety of skin diseases such as burns, infections, psoriasis and so on. 

Clinically, usnic acid can be used to treat tuberculosis, intestinal tuberculosis and other symptoms, such as cough, loss of appetite, fever or intestinal tuberculous diarrhea, and even make the TB bacteria negative ‌.

Usnic acid also acts as a analgesic and antipyretic, and its efficacy is comparable to aminopyrine, butazone and hydrocortisone semitunate ‌.

Usnic acid and its sodium salts are used to treat chronic bronchitis, trauma, suppurative infections and many other diseases ‌.

Usnic acid has a strong inhibitory effect on a variety of gram-positive bacteria and mycobacterium tuberculosis, and also has a certain effect on gram-negative bacteria, so it can be used in antibacterial treatment ‌.

Usnic acid also has antiviral activity and has potential inhibitory effect on the proliferation of murine polyomavirus ‌.

‌Cosmetics ‌

Usnic acid is often used as an additive in toothpaste and cosmetics for hemostasis, antibacterial, anti-inflammatory, wound healing ‌.

Usnic acid is a very promising natural sunscreen that can be used in cosmetics such as sunscreen ‌.

‌Environmental monitoring ‌

The study found that the application of usnic acid in environmental monitoring, such as by meASUring the content of usnic acid in lichens, can understand the impact of environmental changes on lichens ‌.

In addition, usnic acid has insecticidal and anti-tumor effects, and is expected to be developed into a new generation of anti-cancer drugs ‌. These various pharmacological actions make usnic acid have wide application prospects in the fields of medicine, cosmetics and environmental monitoring ‌.