This review summarized the current breakthroughs in the chemistry of acridines as anti-cancer agents, including new structural and biologically active acridine attributes. Acridine derivatives are a class of compounds that are being extensively researched as potential anti-cancer drugs. Acridines are well-known for their high cytotoxic activity; however, their clinical application is restricted or even excluded as a result of side effects. The photocytotoxicity of propyl acridine acts against leukaemia cell lines, with C1748 being a promising anti-tumour drug against UDP-UGT’s. CK0403 is reported in breast cancer treatment and is more potent than CK0402 against estrogen receptor-negative HER2. Acridine platinum (Pt) complexes have shown specificity on the evaluated DNA sequences; 9-anilinoacridine core, which intercalates DNA, and a methyl triazene DNA-methylating moiety were also studied. Acridine thiourea gold and acridinone derivatives act against cell lines such as MDA-MB-231, SK-BR-3, and MCF-7. Benzimidazole acridine compounds demonstrated cytotoxic activity against Dual Topo and PARP-1. Quinacrine, thiazacridine, and azacridine are reported as anti-cancer agents, which have been reported in the previous decade and were addressed in this review article.
The new coronavirus [severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)] that caused a viral disease with a high risk of mortality (coronavirus disease 2019) was found toward the end of 2019. This was a significant acute respiratory syndrome. In a brief period, this virus spread throughout the entire planet, causing tremendous loss of life and economic damage. The process of developing new treatments takes time, and there are presently no recognized specific treatments to treat this infection. The most promising participants, who subsequently developed into prospective leads, were dropped from the clinical research in their latter phases. Medication that has previously acquired permission may only be repurposed for use for various medical reasons following a thorough investigation for safety and effectiveness. Because there are now no effective treatments available, natural products are being used haphazardly as antiviral medications and immunity boosters. The fundamental statement that most natural compounds have powerful antiviral action does not apply to SARS-CoV-2. Middle East respiratory syndrome coronavirus and severe acute respiratory syndrome coronavirus infections are inhibited by natural treatments. According to an in silico study, the virus’ nonstructural proteins, including PLpro, Mpro, and RdRp, as well as structural proteins like the spike (S) protein, have been shown to have a strong affinity for several natural products and to be inhibited by them. The virus also suggests that it is a valid candidate for therapeutic research since it utilizes the intracellular angiotensin-converting enzyme 2 receptor of the host cell. In this study, interesting targets for SARS-CoV-2 medication development are explored, as well as the antiviral properties of some well-known natural compounds.
Acridine derivatives have been thoroughly investigated and discovered to have multitarget qualities, inhibiting topoisomerase enzymes that regulate topological changes in DNA and interfering with DNA's vital biological function. This article discusses current progress in the realm of novel 9-substituted acridine heterocyclic compounds, including the structure and structure–activity connection of the most promising molecules. The IC50 values of the new compounds against several human cancer cell lines will also be presented in the publication. The review also looks into the inhibition of topoisomerase by polycyclic aromatic compounds. Background: Acridine rings can be found in molecules used in many different areas, including industry and medicine. Nowadays, acridines with anti-bacterial activity are of research interest due to decreasing bacterial resistance. Some acridine derivatives showed antimalarial or antiviral activity. Acridine derivatives were also investigated for anti-tumor activity due to the interaction with topoisomerase II and DNA base pairs. Considering these possible uses of acridine derivatives, this work was made to overview of all significant structure performances for the specific action of these compounds. Objective: To review the activity of acridines as anti-proliferative agents. Design: This review is designed as acridines acting as topoisomerase I and II inhibitors/ poison, Acridines on the G-quadraplux interaction, Acridines with metal complexes, Acridines with quinacrine scaffold, Acridines with sulphur moiety. Conclusion: Although introduced in the 19th century, acridine derivatives are still of scientific interest. In this review, acridine derivatives with various biological activities (antiparasitic, antiviral, anti-bacterial, and antiproliferative) and their structure-activity relationship analyses are presented. Although several mechanisms of their action are known, the only important are discussed here. It can be concluded that the dominant mechanisms are DNA intercalation and interaction with enzymes.
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