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T A AR, Rajendra TN, Suhas KP, Ippagunta SK, Chaudhary S. 1,2,4,5-Tetraoxane derivatives/hybrids as potent antimalarial endoperoxides: Chronological advancements, structure-activity relationship (SAR) studies and future perspectives. Med Res Rev 2024; 44:2266-2290. [PMID: 38618882 DOI: 10.1002/med.22040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 02/24/2024] [Accepted: 03/30/2024] [Indexed: 04/16/2024]
Abstract
Malaria is a life-threatening disease that affects tropical and subtropical regions worldwide. Various drugs were used to treat malaria, including artemisinin and derivatives, antibiotics (tetracycline, doxycycline), quinolines (chloroquine, amodiaquine), and folate antagonists (sulfadoxine and pyrimethamine). Since the malarial parasites developed drug resistance, there is a need to develop new chemical entities with high efficacy and low toxicity. In this context, 1,2,4,5-tetraoxanes emerged as an essential scaffold and have shown promising antimalarial activity. To improve activity and overcome resistance to various antimalarial drugs; 1,2,4,5-tetraoxanes were fused with various aryl/heteroaryl/alicyclic/spiro moieties (steroid-based 1,2,4,5-tetraoxanes, triazine-based 1,2,4,5-tetraoxanes, aminoquinoline-based 1,2,4,5-tetraoxanes, dispiro-based 1,2,4,5-tetraoxanes, piperidine-based 1,2,4,5-tetraoxanes and diaryl-based 1,2,4,5-tetraoxanes). The present review aims to focus on covering the relevant literature published during the past 30 years (1992-2022). We summarize the most significant in vitro, in vivo results and structure-activity relationship studies of 1,2,4,5-tetraoxane-based hybrids as antimalarial agents. The structural evolution of different hybrids can provide the framework for the future development of 1,2,4,5-tetraoxane-based hybrids to treat malaria.
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Affiliation(s)
- Abdul Rahaman T A
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Thakar Neha Rajendra
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Kshirsagar Prasad Suhas
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Sirish K Ippagunta
- Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sandeep Chaudhary
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
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2
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Mohanty I, Allaband C, Mannochio-Russo H, El Abiead Y, Hagey LR, Knight R, Dorrestein PC. The changing metabolic landscape of bile acids - keys to metabolism and immune regulation. Nat Rev Gastroenterol Hepatol 2024; 21:493-516. [PMID: 38575682 DOI: 10.1038/s41575-024-00914-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/14/2024] [Indexed: 04/06/2024]
Abstract
Bile acids regulate nutrient absorption and mitochondrial function, they establish and maintain gut microbial community composition and mediate inflammation, and they serve as signalling molecules that regulate appetite and energy homeostasis. The observation that there are hundreds of bile acids, especially many amidated bile acids, necessitates a revision of many of the classical descriptions of bile acids and bile acid enzyme functions. For example, bile salt hydrolases also have transferase activity. There are now hundreds of known modifications to bile acids and thousands of bile acid-associated genes, especially when including the microbiome, distributed throughout the human body (for example, there are >2,400 bile salt hydrolases alone). The fact that so much of our genetic and small-molecule repertoire, in both amount and diversity, is dedicated to bile acid function highlights the centrality of bile acids as key regulators of metabolism and immune homeostasis, which is, in large part, communicated via the gut microbiome.
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Affiliation(s)
- Ipsita Mohanty
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Celeste Allaband
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Helena Mannochio-Russo
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Yasin El Abiead
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Lee R Hagey
- Department of Medicine, University of California San Diego, San Diego, CA, USA
| | - Rob Knight
- Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, CA, USA
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA
- Department of Computer Science and Engineering, University of California San Diego, La Jolla, CA, USA
- Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Pieter C Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA.
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA.
- Department of Pharmacology, University of California San Diego, La Jolla, CA, USA.
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA.
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3
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Vítků J, Hampl R. Steroid Conjugates and Their Physiological Role. Physiol Res 2023; 72:S317-S322. [PMID: 38116768 DOI: 10.33549/physiolres.935080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Abstract
While there are hundreds of synthetic steroids conjugates with acids, sugars, proteins and other molecules, only two types of conjugates occur in living organisms, namely sulfates and glucuronides. Steroid glucuronidation in the human liver is the main mechanism controlling the levels and biological activity of unconjugated hormones, and glucuronides are their main excretion products. This process is generally irreversible. On the other hand, sulfates possess their own biological activity that differs from that of the unconjugated steroid, emphasizing the importance of steroid sulfatases and sulfotransferases. Due to their negative charge, steroid sulfates cannot cross the blood-cell barrier and have to use transporters. Their efflux is mediated by specific transporters of the ATP binding cassette protein group, which thus are further factors controlling their physiological effects. Steroid sulfates, especially dehydroepiandrosterone sulfate (DHEAS) are neuroactive steroids, with well-known effects as allosteric modulators of some neurotransmitter receptors, functioning as ion channels, such as gamma-aminobutyric acid, type A (GABAA) receptors or N-methyl-D-aspartate (NMDA) receptors. In this minireview, we highlight some recent findings of non-genomic steroid sulfate actions through specific G-protein coupled receptors (GPCR), which we believe show the way of further research. A few studies have even indicated that sulfates such as DHEAS may even indirectly regulate gene expression via ligand binding to the membrane receptor and, through G-protein and second messenger formation, activate proteins like cAMP Regulated Elements Binding protein (CREB), which then binds to regulated DNA elements of the expressed gene, in a "classical" genomic effect.
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Affiliation(s)
- J Vítků
- Department of Steroids and Proteofactors, Institute of Endocrinology, Prague, Czech Republic.
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4
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Lin C, Ma Z, Gao Y, Le M, Shi Z, Qi D, Ma JC, Cui ZK, Wang L, Jia YG. Main-Chain Cationic Bile Acid Polymers Mimicking Facially Amphiphilic Antimicrobial Peptides. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37400427 DOI: 10.1021/acsami.3c06424] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
Antibiotic-resistant bacterial infections have led to an increased demand for antibacterial agents that do not contribute to antimicrobial resistance. Antimicrobial peptides (AMPs) with the facially amphiphilic structures have demonstrated remarkable effectiveness, including the ability to suppress antibiotic resistance during bacterial treatment. Herein, inspired by the facially amphiphilic structure of AMPs, the facially amphiphilic skeletons of bile acids (BAs) are utilized as building blocks to create a main-chain cationic bile acid polymer (MCBAP) with macromolecular facial amphiphilicity via polycondensation and a subsequent quaternization. The optimal MCBAP displays an effective activity against Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) and Gram-negative Escherichia coli, fast killing efficacy, superior bactericidal stability in vitro, and potent anti-infectious performance in vivo using the MRSA-infected wound model. MCBAP shows the low possibility to develop drug-resistant bacteria after repeated exposure, which may ascribe to the macromolecular facial amphiphilicity promoting bacterial membrane disruption and the generation of reactive oxygen species. The easy synthesis and low cost of MCBAP, the superior antimicrobial performance, and the therapeutic potential in treating MRSA infection altogether demonstrate that BAs are a promising group of building blocks to mimic the facially amphiphilic structure of AMPs in treating MRSA infection and alleviating antibiotic resistance.
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Affiliation(s)
- Caihong Lin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Zunwei Ma
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yunpeng Gao
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Mengqi Le
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Zhifeng Shi
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Dawei Qi
- MediCity Research Laboratory, University of Turku, Turku 20520, Finland
| | - Jian-Chao Ma
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Zhong-Kai Cui
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Lin Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key Laboratory of Biomedical Engineering of Guangdong Province; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education; Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key Laboratory of Biomedical Engineering of Guangdong Province; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education; Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
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Gattu R, Ramesh SS, Nadigar S, D CG, Ramesh S. Conjugation as a Tool in Therapeutics: Role of Amino Acids/Peptides-Bioactive (Including Heterocycles) Hybrid Molecules in Treating Infectious Diseases. Antibiotics (Basel) 2023; 12:antibiotics12030532. [PMID: 36978399 PMCID: PMC10044335 DOI: 10.3390/antibiotics12030532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 02/28/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023] Open
Abstract
Peptide-based drugs are gaining significant momentum in the modern drug discovery, which is witnessed by the approval of new drugs by the FDA in recent years. On the other hand, small molecules-based drugs are an integral part of drug development since the past several decades. Peptide-containing drugs are placed between small molecules and the biologics. Both the peptides as well as the small molecules (mainly heterocycles) pose several drawbacks as therapeutics despite their success in curing many diseases. This gap may be bridged by utilising the so called 'conjugation chemistry', in which both the partners are linked to one another through a stable chemical bond, and the resulting conjugates are found to possess attracting benefits, thus eliminating the stigma associated with the individual partners. Over the past decades, the field of molecular hybridisation has emerged to afford us new and efficient molecular architectures that have shown high promise in medicinal chemistry. Taking advantage of this and also considering our experience in this field, we present herein a review concerning the molecules obtained by the conjugation of peptides (amino acids) to small molecules (heterocycles as well as bioactive compounds). More than 125 examples of the conjugates citing nearly 100 references published during the period 2000 to 2022 having therapeutic applications in curing infectious diseases have been covered.
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Affiliation(s)
- Rohith Gattu
- Postgraduate Department of Chemistry, JSS College of Arts, Commerce and Science, Ooty Road, Mysuru 570025, Karnataka, India
| | - Sanjay S Ramesh
- Postgraduate Department of Chemistry, JSS College of Arts, Commerce and Science, Ooty Road, Mysuru 570025, Karnataka, India
| | - Siddaram Nadigar
- Postgraduate Department of Chemistry, JSS College of Arts, Commerce and Science, Ooty Road, Mysuru 570025, Karnataka, India
| | - Channe Gowda D
- Department of Studies in Chemistry, Manasagangotri, University of Mysore, Mysuru 570005, Karnataka, India
| | - Suhas Ramesh
- Postgraduate Department of Chemistry, JSS College of Arts, Commerce and Science, Ooty Road, Mysuru 570025, Karnataka, India
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6
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Arifian H, Maharani R, Megantara S, Gazzali AM, Muchtaridi M. Amino-Acid-Conjugated Natural Compounds: Aims, Designs and Results. Molecules 2022; 27:molecules27217631. [PMID: 36364457 PMCID: PMC9654077 DOI: 10.3390/molecules27217631] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/29/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
Protein is one of the essential macronutrients required by all living things. The breakdown of protein produces monomers known as amino acids. The concept of conjugating natural compounds with amino acids for therapeutic applications emerged from the fact that amino acids are important building blocks of life and are abundantly available; thus, a greater shift can result in structural modification, since amino acids contain a variety of sidechains. This review discusses the data available on amino acid–natural compound conjugates that were reported with respect to their backgrounds, the synthetic approach and their bioactivity. Several amino acid–natural compound conjugates have shown enhanced pharmacokinetic characteristics, including absorption and distribution properties, reduced toxicity and increased physiological effects. This approach could offer a potentially effective system of drug discovery that can enable the development of pharmacologically active and pharmacokinetically acceptable molecules.
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Affiliation(s)
- Hanggara Arifian
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia
- Department of Pharmacochemistry, Faculty of Pharmacy, Universitas Mulawarman, Samarinda 75119, Indonesia
| | - Rani Maharani
- Research Collaboration Centre for Theranostic Radiopharmaceuticals, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Sandra Megantara
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia
- Research Collaboration Centre for Theranostic Radiopharmaceuticals, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia
| | - Amirah Mohd Gazzali
- School of Pharmaceutical Sciences, Universiti Saisn Malaysia, Penang 11800, Malaysia
| | - Muchtaridi Muchtaridi
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia
- Research Collaboration Centre for Theranostic Radiopharmaceuticals, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia
- Correspondence:
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7
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Bansal R, Suryan A. A Comprehensive Review on Steroidal Bioconjugates as Promising Leads in Drug Discovery. ACS BIO & MED CHEM AU 2022; 2:340-369. [PMID: 37102169 PMCID: PMC10125316 DOI: 10.1021/acsbiomedchemau.1c00071] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ever increasing unmet medical requirements of the human race and the continuous fight for survival against variety of diseases give birth to novel molecules through research. As diseases evolve, different strategies are employed to counter the new challenges and to discover safer, more effective, and target-specific therapeutic agents. Among several novel approaches, bioconjugation, in which two chemical moieties are joined together to achieve noticeable results, has emerged as a simple and convenient technique for a medicinal chemist to obtain potent molecules. The steroid system has been extensively used as a privileged scaffold gifted with significantly diversified medicinal properties in the drug discovery and development process. Steroidal molecules are preferred for their rigidness and good ability to penetrate biological membranes. Slight alteration in the basic ring structure results in the formation of steroidal derivatives with a wide range of therapeutic activities. Steroids are not only active as such, conjugating them with various biologically active moieties results in increased lipophilicity, stability, and target specificity with decreased adverse effects. Thus, the steroid nucleus prominently behaves as a biological carrier for small molecules. The steroid bioconjugates offer several advantages such as synergistic activity with fewer side effects due to reduced dose and selective therapy. The steroidal bioconjugates have been widely explored for their usefulness against various disorders and have shown significant utility as anticancer, anti-inflammatory, anticoagulant, antimicrobial, insecticidal/pesticidal, antioxidant, and antiviral agents along with several other miscellaneous activities. This work provides a comprehensive review on the therapeutic progression of steroidal bioconjugates as medicinally active molecules. The review covers potential biological applications of steroidal bioconjugates and would benefit the wider scientific community in their drug discovery endeavors.
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Affiliation(s)
- Ranju Bansal
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Amruta Suryan
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
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8
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Pacheco DF, Alonso D, Ceballos LG, Castro AZ, Brown Roldán S, García Díaz M, Villa Testa A, Wagner SF, Piloto-Ferrer J, García YC, Olea AF, Espinoza L. Synthesis of Four Steroidal Carbamates with Antitumor Activity against Mouse Colon Carcinoma CT26WT Cells: In Vitro and In Silico Evidence. Int J Mol Sci 2022; 23:ijms23158775. [PMID: 35955909 PMCID: PMC9369283 DOI: 10.3390/ijms23158775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 11/16/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most lethal cancers worldwide. If detected on time, surgery can expand life expectations of patients up to five more years. However, if metastasis has grown deliberately, the use of chemotherapy can play a crucial role in CRC control. Moreover, the lack of selectivity of current anticancer drugs, plus mutations that occur in cancerous cells, demands the development of new chemotherapeutic agents. Several steroids have shown their potentiality as anticancer agents, while some other compounds, such as Taxol and its derivatives bearing a carbamate functionality, have reached the market. In this article, the synthesis, characterization, and antiproliferative activity of four steroidal carbamates on mouse colon carcinoma CT26WT cells are described. Carbamate synthesis occurred via direct reaction between diosgenin, its B-ring modified derivative, and testosterone with phenyl isocyanate under a Brønsted acid catalysis. All obtained compounds were characterized by 1H and 13C Nuclear Magnetic Resonance (NMR), High Resolution Mass Spectroscopy (HRMS); their melting points are also reported. Results obtained from antiproliferative activity assays indicated that carbamates compounds have inhibitory effects on the growth of this colon cancer cell line. A molecular docking study carried out on Human Prostaglandin E Receptor (EP4) showed a high affinity between carbamates and protein, thus providing a valuable theoretical explanation of the in vitro results.
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Affiliation(s)
- Daylin Fernández Pacheco
- Center for Natural Product Research, Faculty of Chemistry, University of Havana, Zapata and G, Havana 10400, Cuba
| | - Dayana Alonso
- Laboratory of Synthetic and Biomolecular Chemistry, Faculty of Chemistry, University of Havana, Havana 10400, Cuba
| | - Leonardo González Ceballos
- Laboratory of Synthetic and Biomolecular Chemistry, Faculty of Chemistry, University of Havana, Havana 10400, Cuba
| | - Armando Zaldo Castro
- Center for Natural Product Research, Faculty of Chemistry, University of Havana, Zapata and G, Havana 10400, Cuba
| | | | - Mairelys García Díaz
- Center for Natural Product Research, Faculty of Chemistry, University of Havana, Zapata and G, Havana 10400, Cuba
| | | | | | | | - Yamilet Coll García
- Center for Natural Product Research, Faculty of Chemistry, University of Havana, Zapata and G, Havana 10400, Cuba
- Correspondence: (Y.C.G.); (L.E.); Tel.: +53-52952050 (Y.C.G.); +56-32-2654225 (L.E.)
| | - Andrés F. Olea
- Grupo QBAB, Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaseaux 2801, San Miguel, Santiago 7500912, Chile
| | - Luis Espinoza
- Departamento de Química, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2340000, Chile
- Correspondence: (Y.C.G.); (L.E.); Tel.: +53-52952050 (Y.C.G.); +56-32-2654225 (L.E.)
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9
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Huo H, Li G, Shi B, Li J. Recent advances on synthesis and biological activities of C-17 aza-heterocycle derived steroids. Bioorg Med Chem 2022; 69:116882. [PMID: 35749841 DOI: 10.1016/j.bmc.2022.116882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/15/2022] [Accepted: 06/08/2022] [Indexed: 11/02/2022]
Abstract
Steroids modification for improving their biological activities is one of the most efficient and fruitful methods to develop novel medicines. Steroids with aza-heterocycles attaching to the C-17 owing various biological activities have received great attentions and some of the compounds are developed successfully as drugs. In this review, the research of the syntheses and biological activities of steroids bearing various aza-heterocycles published in the last 8 years is assembled, and some important structure-activity relationships (SARs) of active compounds are presented. According to the analysis of the literatures and our experiences in this field, the potential of aza-heterocyclic steroids as medicinal drugs is proposed.
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Affiliation(s)
- Haibo Huo
- Department of Life Sciences, Changzhi University, Changzhi 046011, Shanxi, China
| | - Guixia Li
- Department of Basic Medicine, Changzhi Medical College, Changzhi, China
| | - Baojun Shi
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jian Li
- Department of Life Sciences, Changzhi University, Changzhi 046011, Shanxi, China; Department of Chemistry, Changzhi University, Changzhi 046011, Shanxi, China.
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10
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Eras A, Castillo D, Suárez M, Vispo NS, Albericio F, Rodriguez H. Chemical Conjugation in Drug Delivery Systems. Front Chem 2022; 10:889083. [PMID: 35720996 PMCID: PMC9204480 DOI: 10.3389/fchem.2022.889083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/11/2022] [Indexed: 11/18/2022] Open
Abstract
Cancer is one of the diseases with the highest mortality rate. Treatments to mitigate cancer are usually so intense and invasive that they weaken the patient to cure as dangerous as the own disease. From some time ago until today, to reduce resistance generated by the constant administration of the drug and improve its pharmacokinetics, scientists have been developing drug delivery system (DDS) technology. DDS platforms aim to maximize the drugs’ effectiveness by directing them to reach the affected area by the disease and, therefore, reduce the potential side effects. Erythrocytes, antibodies, and nanoparticles have been used as carriers. Eleven antibody–drug conjugates (ADCs) involving covalent linkage has been commercialized as a promising cancer treatment in the last years. This review describes the general features and applications of DDS focused on the covalent conjugation system that binds the antibody carrier to the cytotoxic drug.
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Affiliation(s)
- Alexis Eras
- School of Chemical Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador
| | - Danna Castillo
- School of Chemical Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador
| | - Margarita Suárez
- Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de la Habana, La Habana, Cuba
| | - Nelson Santiago Vispo
- School of Biological Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador
- *Correspondence: Nelson Santiago Vispo, ; Fernando Albericio, ; Hortensia Rodriguez,
| | - Fernando Albericio
- Department of Surfactants and Nanobiotechnology, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain
- CIBER-BBN, Networking Centre of Bioengineering, Biomaterials, and Nanomedicine and Department of Organic Chemistry, University of Barcelona, Barcelona, Spain
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
- *Correspondence: Nelson Santiago Vispo, ; Fernando Albericio, ; Hortensia Rodriguez,
| | - Hortensia Rodriguez
- School of Chemical Sciences and Engineering, Yachay Tech University, Urcuquí, Ecuador
- *Correspondence: Nelson Santiago Vispo, ; Fernando Albericio, ; Hortensia Rodriguez,
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11
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Vorontsova SK, Zavarzin IV, Shirinian VZ, Bozhenko EI, Andreeva OE, Sorokin DV, Scherbakov AM, Minyaev ME. Synthesis and crystal structures of D-annulated pentacyclic steroids: looking within and beyond AR signalling in prostate cancer. CrystEngComm 2022. [DOI: 10.1039/d1ce01417j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbocyclic steroids D-annulated at 16α and 17α positions with a 5-membered ring E are easily accessible via the interrupted Nazarov cyclization. Three steroid series have been structurally studied: chlorine-containing D-annulated...
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12
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Huo H, Jiang W, Sun F, Li J, Shi B. Synthesis and biological evaluation of novel steroidal pyrazole amides as highly potent anticancer agents. Steroids 2021; 176:108931. [PMID: 34655595 DOI: 10.1016/j.steroids.2021.108931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/18/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022]
Abstract
A series of thirty-six steroidal pyrazole amides, divided into two categories based on their main skeletons were designed and synthesized via a five-step synthetic route. The final product is obtained through Pinnick oxidation of pyrazole aldehydes to yield the corresponding acids, which then underwent amidation to afford the target products efficiently under mild reaction conditions. Structures of the desired compounds were confirmed by 1H NMR, 13C NMR, high resolution mass spectrometry; X-ray structural characterization of compound 16n was also obtained. The synthesized compounds were screened for their antiproliferative activity against four cancer cell lines (Pc-3 A549, Hela, HepG2) using the SRB method. Amides 10n, 16n, and 16p-16t exhibited moderate to high cytotoxic activities with IC50 values ranging from 2.05 to 8.73 μM. Of note, the hydrochloride derivative 16p displayed the highest activity towards PC-3 cells with IC50 values of 2.05 μM. Analysis of structure-activity relationships indicated that the presence of the diamine moiety and the aqueous solubility of the derivatives were vital factors for antiproliferative potency. Furthermore, molecule 16p induced PC-3 cells apoptosis and arrested cell cycle at G1 phase in a dose-dependent manner.
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Affiliation(s)
- Haibo Huo
- State Key Laboratory of Crop Stress Biology in Arid Area, College of Life Science, Northwest Agriculture and Forestry University, Yangling 712100, China
| | - Weiqi Jiang
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Feifei Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jian Li
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Baojun Shi
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
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13
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Lin C, Wang Y, Le M, Chen KF, Jia YG. Recent Progress in Bile Acid-Based Antimicrobials. Bioconjug Chem 2021; 32:395-410. [PMID: 33683873 DOI: 10.1021/acs.bioconjchem.0c00642] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
With the emergence of drug-resistant bacteria and the formation of biofilms by bacteria and fungi, microbial infections gradually threaten global health. Natural antimicrobial peptides (AMPs) have low susceptibility for developing resistance due to the membrane targeted mechanism, but instability and high manufacturing cost limit their applications in clinic. Bile acids, a group of steroids in the human body, with high stability, biocompatibility, and inherent facial amphiphilic structure similar to the characteristics of AMPs, have been applied to the biological field, such as drug delivery systems, self-healing hydrogels, antimicrobials, and so on. In this review, we mainly focus on the different classes of bile acid-based antimicrobials in recent years. Various designs and methods for the preparation of unimolecular antimicrobials with bile acid skeletons are first introduced, including coupling of primary amine, quaternary ammonium, and amino acid units with bile acid skeletons. Some representative oligomeric antimicrobials, including dimers of bile acids, are summarized. Finally, macromolecular antimicrobials bearing some positive charges at the main chain or side chain and interaction mechanisms of these bile acid-based antimicrobials are discussed.
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Affiliation(s)
- Caihong Lin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China
| | - Yushi Wang
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China
| | - Mengqi Le
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China
| | - Kai-Feng Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China.,Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, China.,Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
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14
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Wu Y, Williams J, Calder EDD, Walport LJ. Strategies to expand peptide functionality through hybridisation with a small molecule component. RSC Chem Biol 2021; 2:151-165. [PMID: 34458778 PMCID: PMC8341444 DOI: 10.1039/d0cb00167h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/09/2020] [Indexed: 02/04/2023] Open
Abstract
Combining different compound classes gives molecular hybrids that can offer access to novel chemical space and unique properties. Peptides provide ideal starting points for such molecular hybrids, which can be easily modified with a variety of molecular entities. The addition of small molecules can improve the potency, stability and cell permeability of therapeutically relevant peptides. Furthermore, they are often applied to create peptide-based tools in chemical biology. In this review, we discuss general methods that allow the discovery of this compound class and highlight key examples of peptide-small molecule hybrids categorised by the application and function of the small molecule entity.
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Affiliation(s)
- Yuteng Wu
- Protein-Protein Interaction Laboratory, The Francis Crick Institute London UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London London UK
| | - Jack Williams
- Protein-Protein Interaction Laboratory, The Francis Crick Institute London UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London London UK
| | - Ewen D D Calder
- Protein-Protein Interaction Laboratory, The Francis Crick Institute London UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London London UK
| | - Louise J Walport
- Protein-Protein Interaction Laboratory, The Francis Crick Institute London UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London London UK
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15
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Huang D, Wang S, Song D, Cao X, Huang W, Ke S. Discovery of γ-Lactam Alkaloid Derivatives as Potential Fungicidal Agents Targeting Steroid Biosynthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14438-14451. [PMID: 33225708 DOI: 10.1021/acs.jafc.0c05823] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Biological control of plant pathogens is considered as one of the green and effective technologies using beneficial microorganisms or microbial secondary metabolites against plant diseases, and so microbial natural products have played important roles in the research and development of new and green agrochemicals. To explore the potential applications for natural γ-lactam alkaloids and their derivatives, 26 γ-lactams that have flexible substituent patterns were synthesized and characterized, and their in vitro antifungal activities against eight kinds of plant pathogens belonging to oomycetes, basidiomycetes, and deuteromycetes were fully evaluated. In addition, the high potential compounds were further tested using an in vivo assay against Phytophthora blight of pepper to verify a practical application for controlling oomycete diseases. The potential modes of action for compound D1 against Phytophthora capsici were also investigated using microscopic technology (optical microscopy, scanning electron microscopy, and transmission electron microscopy) and label-free quantitative proteomics analysis. The results demonstrated that compound D1 may be a potential novel fungicidal agent against oomycete diseases (EC50 = 4.9748 μg·mL-1 for P. capsici and EC50 = 5.1602 μg·mL-1 for Pythium aphanidermatum) that can act on steroid biosynthesis, which can provide a certain theoretical basis for the development of natural lactam derivatives as potential antifungal agents.
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Affiliation(s)
- Daye Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
| | - Shuangshuang Wang
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Di Song
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiufang Cao
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenbo Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
| | - Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
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16
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Wan Y, Long J, Gao H, Tang Z. 2-Aminothiazole: A privileged scaffold for the discovery of anti-cancer agents. Eur J Med Chem 2020; 210:112953. [PMID: 33148490 DOI: 10.1016/j.ejmech.2020.112953] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/14/2020] [Accepted: 10/18/2020] [Indexed: 12/11/2022]
Abstract
Cancer has been the second heath killer being next only to cardiovascular diseases in human society. Although many efforts have been taken for cancer therapy and many achievements have been yielded in the diagnosis and treatment of cancer, the current first-line anti-cancer agents are insufficient owing to the emergence of multi-drug resistance and side effects. Therefore, it is urgent to develop new anti-cancer agents with high activity and low toxicity. 2-Aminothiazole is a class of important scaffold which widely distributes in many natural and synthetic compounds with many pharmacological effects including the potential anti-cancer activity. In this review, we summarized the recent progress of 2-aminothiazole as a privileged scaffold for the discovery of anti-cancer agents based on biological targets, such as tubulin protein, histone acetylase/histone deacetylase (HAT/HDAC), phosphatidylinositol 3-kinases (PI3Ks), Src/Abl kinase, BRAF kinase, epidermal growth factor receptor (EGFR) kinase and sphingosine kinase (SphK), and also investigated the structure-activity relationships (SARs) of most compounds. It is believed that this review could be helpful for medicinal chemists in the discovery of more anti-cancer agents bearing 2-aminothiazole scaffold with excellent activity and high therapeutic index.
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Affiliation(s)
- Yichao Wan
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China; Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China.
| | - Jiabing Long
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China; Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China
| | - Han Gao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China; Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China
| | - Zilong Tang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China; Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, PR China
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17
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Nature-derived anticancer steroids outside cardica glycosides. Fitoterapia 2020; 147:104757. [PMID: 33069834 DOI: 10.1016/j.fitote.2020.104757] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 12/23/2022]
Abstract
Steriods which are ubiquitous in natural resources are important components of cell membranes and involved in several physiological functions. Steriods not only exerted the anticancer activity through inhibition of various enzymes and receptors in cancer cells, inclusive of aromatase, sulfatase, 5α-reductase, hydroxysteroid dehydrogenase and CYP 17, but also exhibited potential activity against various cancer forms including multidrug-resistant cancer with low cytotoxicity, and high bioavailability. Accordingly, steroids are useful scaffolds for the discovery of novel anticancer agents. This review aims to outline the advances of nature-derived steroids outside cardica glycosides with anticancer potential, covering the articles published between Jan. 2015 and Aug. 2020.
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18
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Misra SK, Moitra P, Kondaiah P, Bhattacharya S. Breaking the Barrier of Polynucleotide Size, Type, and Topology in Smad2 Antisense Therapy Using a Cationic Cholesterol Dimer with Flexible Spacer. ACS APPLIED BIO MATERIALS 2020; 3:7712-7721. [DOI: 10.1021/acsabm.0c00924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Santosh K. Misra
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - Parikshit Moitra
- Technical Research Centre, Indian Association for the Cultivation of Science, Kolkata 700032, India
- Department of Pediatrics, Center for Blood Oxygen Transport and Hemostasis, School of Medicine, Health Sciences Facility III, University of Maryland Baltimore, 670 W Baltimore St, Baltimore, Maryland 21201, United States
| | - Paturu Kondaiah
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560 012, India
| | - Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
- Technical Research Centre, Indian Association for the Cultivation of Science, Kolkata 700032, India
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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19
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Lehner AF, Dirikolu L, Johnson M, Buchweitz JP, Langlois DK. Liquid chromatography/tandem mass spectrometric analysis of penicillamine for its pharmacokinetic evaluation in dogs. Toxicol Mech Methods 2020; 30:687-702. [PMID: 32854553 DOI: 10.1080/15376516.2020.1814467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Copper storage disease occurs in multiple dog breeds and is one of the most common causes of chronic hepatitis in this species. The disease is caused by hereditary defects in copper metabolism in conjunction with high dietary copper levels. The progressive copper accumulation leads to hepatitis, cirrhosis, and eventually death if left untreated. Copper chelators are critical in modulating the effects of this disease. It is therefore of significant practicality to understand the pharmacokinetic (PK) parameters of chelating agents, particularly since they are oftentimes quite expensive. A liquid chromatography-tandem mass spectrometric (LC/MS/MS) method was developed to measure plasma levels of one of the most common chelators, d-penicillamine. The compound was discovered to exist in two forms, monomeric and dimeric, and various chemical derivatizations were tried to force the compound into one form or the other. Eventually, the simplest approach was individual determination of penicillamine and its dimer, with summation of the two quantities. This enabled determination of canine PK parameters for penicillamine based on comparison of oral and intravenous administration of the drug, including time to maximum drug level (Tmax), concentration at maximum (Cmax), clearance (Cls) and volume of distribution (Vdss). The drug was found to exist predominantly in the dimeric form in plasma, which is incapable of chelating copper owing to lack of free sulfhydryl groups and must therefore provide a storage form of the drug in equilibrium with its monomeric form in vivo. Mechanisms are discussed for the electrospray-induced fragmentation of penicillamine as well as of its dimer.
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Affiliation(s)
- Andreas F Lehner
- Veterinary Diagnostic Laboratory, Michigan State University, East Lansing, MI, USA
| | - Levent Dirikolu
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisianna State University, Baton Rouge, LA, USA
| | - Margaret Johnson
- Veterinary Diagnostic Laboratory, Michigan State University, East Lansing, MI, USA
| | - John P Buchweitz
- Veterinary Diagnostic Laboratory, Michigan State University, East Lansing, MI, USA.,Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI, USA
| | - Daniel K Langlois
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
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20
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Singla P, Kaur M, Kumari A, Kumari L, Pawar SV, Singh R, Salunke DB. Facially Amphiphilic Cholic Acid-Lysine Conjugates as Promising Antimicrobials. ACS OMEGA 2020; 5:3952-3963. [PMID: 32149222 PMCID: PMC7057326 DOI: 10.1021/acsomega.9b03425] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
The emergence of multidrug-resistant microbes is a significant health concern posing a constant need for new antimicrobials. Membrane-targeting antibiotics are promising candidates with reduced ability of microbes to develop resistance. In the present investigation, the principal reason behind choosing cholic acid as the crucial scaffold lies in the fact that it has a facially amphiphilic nature, which provides ample opportunity to refine the amphiphilicity by linking the amino acid lysine. A total of 16 novel amphipathic cholic acid derivatives were synthesized by sequentially linking lysine to C3-β-amino cholic acid methyl ester to maintain the hydrophobic/hydrophilic balance, which could be the essential requirement for the antimicrobial activity. Among the synthesized conjugates, a series with fluorenyl-9-methoxycarbonyl moiety attached to cholic acid via lysine linker showed promising antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans. A pronounced effect of increase in lysine residues was noted on the observed activity. The lead compounds were found to be active against drug-resistant bacterial and fungal clinical isolates and also improved the efficacy of antifungal agents amphotericin B and voriconazole. Membrane-permeability studies demonstrated the ability of these compounds to induce membrane damage in the tested microbes. The active conjugates did not show any hemolytic activity and were also found to be nontoxic to the normal cells as well as the examined cancer cell lines. The observed antimicrobial activity was attributed to the facial amphiphilic conformations, hydrophobic/hydrophilic balance, and the overall charge on the molecules.
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Affiliation(s)
- Poonam Singla
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Mahaldeep Kaur
- Department
of Microbial Biotechnology, Panjab University, Chandigarh 160014, India
| | - Anjna Kumari
- Department
of Microbial Biotechnology, Panjab University, Chandigarh 160014, India
| | - Laxmi Kumari
- University
Institute of Pharmaceutical Sciences (UIPS), Panjab University, Chandigarh 160014, India
| | - Sandip V. Pawar
- University
Institute of Pharmaceutical Sciences (UIPS), Panjab University, Chandigarh 160014, India
| | - Rachna Singh
- Department
of Microbial Biotechnology, Panjab University, Chandigarh 160014, India
| | - Deepak B. Salunke
- Department
of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
- National
Interdisciplinary Centre of Vaccine, Immunotherapeutics and Antimicrobials, Panjab University, Chandigarh 160014, India
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