A new pyrimidine alkaloid from the roots of Tadehagi triquetrum (L.) H.Ohashi

Therapeutic potential of flavonoids in ovalbumin induced asthma in mice model

OBJECTIVES

Desmodium triquetrum DC (Fabaceae) is a plant commonly used in Indian traditional medicine to treat allergies. Asthma is a severe condition, with an estimated 300 million deaths annually, which could increase to 400 million by 2025. Flavonoids, a class of compounds found in many plants, have been found to have beneficial effects in treating asthma. In this study, researchers focused on three flavonoids, Baicalein, Naringin, and Neohesperidin, derived from Desmodium triquetrum DC, to investigate their potential as a treatment for asthma.

METHODS

The study used an aerosolized ovalbumin-induced asthma model to evaluate the effects of the flavonoids on various substances in bronchoalveolar lavage fluid, including total differential leukocyte, nitrite, nitrate, TNF, IL-4, and IL-13. The researchers also measured the levels of myeloperoxidase and malondialdehyde in the lungs.

RESULTS

The results showed that ovalbumin-induced airway hyper-responsiveness led to a significant increase in pro-inflammatory cytokine levels. However, the flavonoids significantly decreased the severity of airway inflammation. Histopathology results also supported the effectiveness of the flavonoids. These findings suggest that these flavonoids could be a supplementary and alternative treatment for asthma by inhibiting the pro-inflammatory pathway.

CONCLUSIONS

The findings suggest that the isolated compounds have the potential to act cumulatively to decrease the levels of the tested cytokines, normalize eosinophil and activated lymphocyte counts, and significantly reduce MPO and MDA. This indicates a possible respiratory mechanism of action for the drugs.

The biological active compounds and biological activities of Desmodium species from Indian region: a review

Background

India is a diverse source of medicinal and aromatic plants. Desmodium species are one among them having importance in curing many human diseases. This herbaceous plant's species diversity minimizes problems with its pharmaceutical or herbal formulation. As a result, a detailed analysis of the phytochemistry of the Desmodium genus will allow for the proper use of this plant.

Main body

This review explores the distribution of Desmodium species and their various biological activities. Worldwide, 17 Desmodium species are found, while 13 species of Desmodium are found in India. Plants are mainly used in ayurvedic preparation for curing various diseases. Phytochemical examination of Desmodium species indicated the presence of isoflavones, glycosyl-flavonoids, coumarone-chromones, pterocarpons, triterpenoids, saponins, tetrahydroiso-quinolones, phenylethylamines, indole-3-alkylamines, lipids, and alkaloids. These genera also display various pharmacological activities, including anti-inflammatory, anticancer, analgesic, depressive, antipyretic, antidepressant, anti-diabetic, and antioxidant properties. Also it is valuable for febrifuges, remedies for dysentery and liver disease, wound healing, ulcer, antidote against snake bites, catarrh, abscesses and eye diseases, abdominal tumor, asthma, fever, nasal polyps, menstrual disorder, fever, colds and helps in kidney problems.

Conclusion

This review describes the distribution of various Desmodium species recorded by a different author, focusing on species recorded in Gujarat, India. Again, the review helps in the documentation of bioactive compounds from the Desmodium genus that may help rectify multiple severe diseases. Furthermore, the numerous biological potencies of the specific bioactive substance may characterize the interest in various pharmaceuticals and cosmeceuticals sectors.

Antioxidant product analysis of Hulu Tea (Tadehagi triquetrum)

Phytophenols from Hulu Tea can produce not only homodimers but also a heterodimer through the antioxidant activity.

Naturally Inspired Pyrimidines Analogues for Alzheimer's Disease

Alzheimer's disease (AD) is a multifarious and developing neurodegenerative disorder. The treatment of AD is still a challenge and availability of drug therapy on the basis of symptoms is not up to the mark. In the context of existence, which is getting worse for the human brain, it is necessary to take care of all critical measures. The disease is caused due to multidirectional pathology of the body, which demands the multi-target-directed ligand (MTDL) approach. This gives hope for new drugs for AD, summarized here in with the pyrimidine based natural product inspired molecule as a lead. The review is sufficient in providing a list of chemical ingredients of the plant to cure AD and screen them against various potential targets of AD. The synthesis of a highly functionalized scaffold in one step in a single pot without isolating the intermediate is a challenging task. In few examples, we have highlighted the importance of this kind of reaction, generally known as multi-component reaction. Multi-component is a widely accepted technique by the drug discovery people due to its high atom economy. It reduces multi-step process to a one-step process, therefore the compounds library can be made in minimum time and cost. This review has highlighted the importance of multicomponent reactions by giving the example of active scaffolds of pyrimidine/fused pyrimidines. This would bring importance to the fast as well as smart synthesis of bio-relevant molecules.

Direct C-H photoarylation of diazines using aryldiazonium salts and visible-light

In this study, direct C–H photoarylation of pyrazine with aryldiazonium salts under visible-light irradiation (blue-LEDs) is described, and additional examples including photoarylations of pyrimidine and pyridazine are also covered. The corresponding aryl-diazines were prepared in yields up to 84% only by mixing and irradiating the reaction with no need for an additional photocatalyst. We demonstrate the efficacy of this protocol by the scope with electron-donor, -neutral, and -withdrawing groups attached at the ortho, meta, and para positions of the aryldiazonium salts; the results are better than those reported for ruthenium-complex mediated photoarylations. Additionally, we demonstrate the robustness of this methodology with a 5 mmol scaled-up experiment. Mechanistic studies were carried out giving support to the proposal of a photocatalyzed approach by an electron donor–acceptor (EDA) complex, also highlighting the crucial role that solvents play in the formation of the EDA complex.

An electron donor–acceptor (EDA) approach for the direct C–H photoarylation of diazines using aryldiazonium salts and visible-light is described.