1
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Mandal S, Barman M, Debnath B, Punniyamurthy T. Dual C(sp 3)-H and C(sp 2)-H Activation of 8-Methylquinoline N-Oxides: A Route to Access C7-H Bond. Org Lett 2024; 26:7560-7564. [PMID: 39230580 DOI: 10.1021/acs.orglett.4c02584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
A Pd(II)-catalyzed regioselective dual C(sp3)-H/C7(sp2)-H activation and annulation of 8-methylquinoline N-oxides with maleimide has been accomplished. The use of N-oxide as a weak directing group under Pd(II)-complex catalysis activates the initial C(sp3)-H and triggers a relayed, second C7(sp2)-H activation. The dual C-H bond activation, [3 + 2]-annulation, facile introduction and removal of the directing group, substrate scope, and functional group diversity are the important practical features.
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Affiliation(s)
- Santu Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Madhab Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, India
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2
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Thongpat K, Milehman N, Rojanaverawong W, Holasut P, Soodvilai S, Vaddhanaphuti CS, Tadpetch K. Total Synthesis and Anti-inflammatory Activity of Asperjinone and Asperimide C. JOURNAL OF NATURAL PRODUCTS 2024; 87:2045-2054. [PMID: 39110498 PMCID: PMC11348413 DOI: 10.1021/acs.jnatprod.4c00557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/28/2024] [Accepted: 07/30/2024] [Indexed: 08/24/2024]
Abstract
Total syntheses of two γ-butenolide natural products, asperjinone (1) and asperimide C (2) in both racemic and chiral forms have been accomplished utilizing Basavaiah's one-pot Friedel-Crafts/maleic anhydride formation protocol as a key strategy. Our syntheses verified the revised structure of 1 proposed by Williams et al. and the structure and absolute configuration of 2 reported by the Li group. This work also discloses the unprecedented anti-inflammatory activity of 1. Synthetic 1 exhibited significant anti-inflammatory activity in renal proximal tubular epithelial cells (RPTEC) by suppression of gene expression of pro-inflammatory cytokines TNF-α, IL-1β and IL-6 under LPS-induced renal inflammation condition and was superior to (S)-1, rac-2, 2, and a positive drug control, indomethacin. Moreover, compound 1 inhibited downstream signaling of inflammation by significantly reducing iNOS and COX-2 gene expression and total NO production. The anti-inflammatory activity of asperjinone (1) renders it a potential and promising candidate for developing novel anti-inflammatory agents against inflammation worsening acute kidney injury.
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Affiliation(s)
- Kittisak Thongpat
- Division
of Physical Science and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Natthawat Milehman
- Division
of Physical Science and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Worarat Rojanaverawong
- Office
of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
- Innovative
Research Unit of Epithelial Transport and Regulation, Department of
Physiology, Faculty of Medicine, Chiang
Mai University, Chiang
Mai 50200 Thailand
| | - Pannita Holasut
- Innovative
Research Unit of Epithelial Transport and Regulation, Department of
Physiology, Faculty of Medicine, Chiang
Mai University, Chiang
Mai 50200 Thailand
| | - Sunhapas Soodvilai
- Research
Center of Transport Protein for Medical Innovation, Department of
Physiology, Faculty of Science, Mahidol
University, Bangkok 10400, Thailand
| | - Chutima S. Vaddhanaphuti
- Innovative
Research Unit of Epithelial Transport and Regulation, Department of
Physiology, Faculty of Medicine, Chiang
Mai University, Chiang
Mai 50200 Thailand
| | - Kwanruthai Tadpetch
- Division
of Physical Science and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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3
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Wu R, Xu H, Zhou H, Yu P, Wen Z, Chen W. Electrochemically promoted thio-Michael addition of N-substituted maleimides to thiols in an aqueous medium. Org Biomol Chem 2024; 22:5401-5405. [PMID: 38874577 DOI: 10.1039/d4ob00734d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
A stable and practical electrochemical method was developed to promote the thio-Michael addition of N-substituted maleimides to various thiols in an aqueous medium. This protocol was found to be excellent in terms of facile scale-up, oxidant- and catalyst-free conditions, broad substrate scopes, good functional group tolerance, and easily available substrates. Notably, a plausible reaction mechanism was derived from the results of a series of control experiments and CV studies, which indicated that a radical pathway might speed up the thio-Michael addition under constant current.
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Affiliation(s)
- Run Wu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
| | - Haojian Xu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
| | - Haiping Zhou
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
| | - Pingbing Yu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
| | - Zhaoyue Wen
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
| | - Wei Chen
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University Chengdu, Sichuan, 610031, China.
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4
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Zhao YL, Jin Y, Han ZY, Song WH, Zhu HL, Zhang J, Wang Q, Wang M, Jiang XW, Gao HY. A new cassane diterpenoid from the seed of Caesalpinia sappan. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024:1-7. [PMID: 38945155 DOI: 10.1080/10286020.2024.2360640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/22/2024] [Indexed: 07/02/2024]
Abstract
In this study, a previously undescribed cassane diterpenoid, named caesalpinin JF (1), along with two known cassane diterpenoids caesanine C (2) and tomocinol B (3), was isolated from 95% EtOH extract of the seeds of Caesalpinia sappan Linn. Additionally, three known compounds including pulcherrin R (4), syringaresinol-4'-O-β-D-glucopyranoside (5) and kaempferol (6) were also identified. The structures of the isolated compounds were elucidated by comprehensive 1D and 2D NMR spectroscopic analyses. Additionally, electronic circular dichroism (ECD) calculation was used to identify the absolute structure of compound 1. Among the isolated compounds, compound 1 displayed a potent anti-neuroinflammation with an IC50 value of 9.87 ± 1.71 μM.
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Affiliation(s)
- Yue-Lin Zhao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yue Jin
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Zi-Ying Han
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Wen-Han Song
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hui-Lin Zhu
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jian Zhang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Qian Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Miao Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiao-Wen Jiang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hui-Yuan Gao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, China
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
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5
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Kim HJ, Kim LK, Kim A, Htwe KM, Heo TH, Shin KJ, Kim HJ, Yoon KD. IL-6 Inhibitory Compounds from the Aerial Parts of Piper attenuatum and Their Anticancer Activities on Ovarian Cancer Cell Lines. Molecules 2024; 29:2981. [PMID: 38998933 PMCID: PMC11242996 DOI: 10.3390/molecules29132981] [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: 05/27/2024] [Revised: 06/20/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
Piper attenuatum Buch-Ham, a perennial woody vine belonging to the Piperaceae family, is traditionally used in Southeast Asia for treating various ailments such as malaria, headache, and hepatitis. This study described the isolation and identification of three new compounds, piperamides I-III (1-3), which belong to the maleimide-type alkaloid skeletons, along with fifteen known compounds (4-18) from the methanol extract of the aerial parts of P. attnuatum. Their chemical structures were elucidated using spectroscopic methods (UV, IR, ESI-Q-TOF-MS, and 1D/2D NMR). All the isolates were evaluated for their ability to inhibit IL-6 activity in the human embryonic kidney-Blue™ IL-6 cell line and their cytotoxic activity against ovarian cancer cell lines (SKOV3/SKOV3-TR) and chemotherapy-resistant variants (cisplatin-resistant A2780/paclitaxel-resistant SKOV3). The compounds 3, 4, 11, 12, 17, and 18 exhibited IL-6 inhibition comparable to that of the positive control bazedoxifene. Notably, compound 12 displayed the most potent anticancer effect against all the tested cancer cell lines. These findings highlight the importance of researching the diverse activities of both known and newly discovered natural products to fully unlock their potential therapeutic benefits.
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Affiliation(s)
- Hye Jin Kim
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (H.J.K.); (A.K.); (K.J.S.)
| | - Lee Kyung Kim
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, BK21FOUR Team for Advanced Program for Smart Pharma Leaders, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (L.K.K.); (T.-H.H.)
| | - Anna Kim
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (H.J.K.); (A.K.); (K.J.S.)
| | - Khin Myo Htwe
- Popa Mountain National Park, Forest Department, Kyaukpadaung Township, Mandalay Division, Kyaukpadaung 05241, Myanmar;
| | - Tae-Hwe Heo
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, BK21FOUR Team for Advanced Program for Smart Pharma Leaders, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (L.K.K.); (T.-H.H.)
| | - Kye Jung Shin
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (H.J.K.); (A.K.); (K.J.S.)
| | - Hee Jung Kim
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, BK21FOUR Team for Advanced Program for Smart Pharma Leaders, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (L.K.K.); (T.-H.H.)
| | - Kee Dong Yoon
- College of Pharmacy, Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Republic of Korea; (H.J.K.); (A.K.); (K.J.S.)
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6
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Xiao Y, Wan C, Wu X, Xu Y, Chen Y, Rao L, Wang B, Shen L, Han W, Zhao H, Shi J, Zhang J, Song Z, Yu F. Novel small-molecule compound YH7 inhibits the biofilm formation of Staphylococcus aureus in a sarX-dependent manner. mSphere 2024; 9:e0056423. [PMID: 38170984 PMCID: PMC10826350 DOI: 10.1128/msphere.00564-23] [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: 10/20/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024] Open
Abstract
The emergence of antibiotic-resistant and biofilm-producing Staphylococcus aureus isolates presents major challenges for treating staphylococcal infections. Biofilm inhibition is an important anti-virulence strategy. In this study, a novel maleimide-diselenide hybrid compound (YH7) was synthesized and demonstrated remarkable antimicrobial activity against methicillin-resistant S. aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) in both planktonic cultures and biofilms. The minimum inhibitory concentration (MIC) of YH7 for S. aureus isolates was 16 µg/mL. Quantification of biofilms demonstrated that the sub-MIC (4 µg/mL) of YH7 significantly inhibits biofilm formation in both MSSA and MRSA. Confocal laser scanning microscopy analysis further confirmed the biofilm inhibitory potential of YH7. YH7 also significantly suppressed bacterial adherence to A549 cells. Moreover, YH7 treatment significantly inhibited S. aureus colonization in nasal tissue of mice. Preliminary mechanistic studies revealed that YH7 exerted potent biofilm-suppressing effects by inhibiting polysaccharide intercellular adhesin (PIA) synthesis, rather than suppressing bacterial autolysis. Real-time quantitative PCR data indicated that YH7 downregulated biofilm formation-related genes (clfA, fnbA, icaA, and icaD) and the global regulatory gene sarX, which promotes PIA synthesis. The sarX-dependent antibiofilm potential of YH7 was validated by constructing S. aureus NCTC8325 sarX knockout and complementation strains. Importantly, YH7 demonstrated a low potential to induce drug resistance in S. aureus and exhibited non-toxic to rabbit erythrocytes, A549, and BEAS-2B cells at antibacterial concentrations. In vivo toxicity assays conducted on Galleria mellonella further confirmed that YH7 is biocompatible. Overall, YH7 demonstrated potent antibiofilm activity supports its potential as an antimicrobial agent against S. aureus biofilm-related infections. IMPORTANCE Biofilm-associated infections, characterized by antibiotic resistance and persistence, present a formidable challenge in healthcare. Traditional antibacterial agents prove inadequate against biofilms. In this study, the novel compound YH7 demonstrates potent antibiofilm properties by impeding the adhesion and the polysaccharide intercellular adhesin production of Staphylococcus aureus. Notably, its exceptional efficacy against both methicillin-resistant and methicillin-susceptible strains highlights its broad applicability. This study highlights the potential of YH7 as a novel therapeutic agent to address the pressing issue of biofilm-driven infections.
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Affiliation(s)
- Yanghua Xiao
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- School of Public Health, Nanchang University, Nanchang, China
| | - Cailing Wan
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- School of Public Health, Nanchang University, Nanchang, China
| | - Xiaocui Wu
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yanlei Xu
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yao Chen
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Lulin Rao
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Bingjie Wang
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Li Shen
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Weihua Han
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Huilin Zhao
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Junhong Shi
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jiao Zhang
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zengqiang Song
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Fangyou Yu
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
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7
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Sanchez Armengol E, Grassiri B, Piras AM, Zambito Y, Fabiano A, Laffleur F. Ocular antibacterial chitosan-maleic acid hydrogels: In vitro and in vivo studies for a promising approach with enhanced mucoadhesion. Int J Biol Macromol 2024; 254:127939. [PMID: 37951441 DOI: 10.1016/j.ijbiomac.2023.127939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/09/2023] [Accepted: 10/29/2023] [Indexed: 11/14/2023]
Abstract
The aim was to design and evaluate a chitosan-based conjugate providing high mucoadhesiveness and antibacterial activity for ocular infections treatment. Chitosan was conjugated with maleic acid via amide bond formation and infrared spectroscopy. Furthermore, 2,4,6-Trinitrobenzene sulfonic acid (TNBS) allowed characterization and quantification of conjugated groups, respectively. Biocompatibility was tested via hemolysis assay and Hen's Egg-Chorioallantoic membrane test. Characterization of the pH and osmolarity of hydrogels was followed by mucoadhesion assessment utilizing rheology. In addition, antibacterial studies were carried out towards Escherichia coli by broth microdilution test and agar-disk diffusion assay. In vivo studies were carried out following the already established Draize test and determining pharmacokinetic profile of dexamethasone in aqueous humour. The conjugate exhibited a degree of modification of 50.05 % and no toxicity or irritability. Moreover, mucoadhesive properties were enhanced in 2.68-fold and 1.81-fold for elastic and viscous modulus, respectively. Furthermore, rheological synergism revealed the presence of a gel-like structure. Additionally, broth microdilution and agar disk diffusion studies exhibited enhancement in antibacterial activity. Finally, in vivo studies manifested that hydrogels were highly tolerated, evidencing promising characteristics of the developed conjugate. The conjugate presented promising antimicrobial, long lasting mucoadhesive features and highly improved pharmacokinetics, leading to a revolutionizing approach in the treatment of ocular bacterial infections.
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Affiliation(s)
- Eva Sanchez Armengol
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Brunella Grassiri
- Department of Pharmacy, University of Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Anna Maria Piras
- Department of Pharmacy, University of Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Ylenia Zambito
- Department of Pharmacy, University of Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Angela Fabiano
- Department of Pharmacy, University of Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Flavia Laffleur
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria.
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8
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Alizadeh A, Rostampoor A. Base-promoted synthesis of dihydrochromeno[4,3- d]pyrrolo[3,4- b]pyridines from 4-chloro-3-substituted coumarins and α-aminomaleimides. Org Biomol Chem 2023; 21:6160-6168. [PMID: 37462528 DOI: 10.1039/d3ob00632h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
This paper describes the base-mediated cascade reactions of 4-chloro-3-substituted coumarins with α-aminomaleimides, allowing the efficient synthesis of dihydrochromeno[4,3-d]pyrrolo[3,4-b]pyridines with interesting chemoselectivity. These transformations include the domino-style formation of C-C/C-N bonds through a base-mediated nucleophilic substitution, Michael addition, N-cyclization, and elimination. The presented synthetic strategy has several advantages: it is simple, uses readily available starting materials and an environmentally friendly solvent, has a highly chemoselective route, and allows the purification of products via washing with EtOH (96%), a technique called GAP (Group-Assisted-Purification) chemistry.
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Affiliation(s)
- Abdolali Alizadeh
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
| | - Azar Rostampoor
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
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9
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Vandyshev DY, Shikhaliev KS. Recyclization of Maleimides by Binucleophiles as a General Approach for Building Hydrogenated Heterocyclic Systems. Molecules 2022; 27:5268. [PMID: 36014507 PMCID: PMC9416709 DOI: 10.3390/molecules27165268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
The building of heterocyclic systems containing hydrogenated fragments is an important step towards the creation of biologically-active compounds with a wide spectrum of pharmacological activity. Among the numerous methods for creating such systems, a special place is occupied by processes using N-substituted maleimides as the initial substrate. This molecule easily reacts in Diels-Alder/retro-Diels-Alder reactions, Michael additions with various nucleophiles, and co-polymerization processes, as have been described in numerous detailed reviews. However, information on the use of maleimides in cascade heterocyclization reactions is currently limited. This study is devoted to a review and analysis of existing literature data on the processes of recyclization of N-substituted maleimides with various C,N-/N,N-/S,N-di- and polynucleophilic agents, such as amidines, guanidines, diamines, aliphatic ketazines, aminouracils, amino- and mercaptoazoles, aminothiourea, and thiocarbomoyl pyrazolines, among others. The significant structural diversity of the recyclization products described in this study illustrates the powerful potential of maleimides as a building block in the organic synthesis of biologically-active compounds with hydrogenated heterocyclic fragments.
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Affiliation(s)
- Dmitriy Yu. Vandyshev
- Department of Organic Chemistry, Faculty of Chemistry, Voronezh State University, Universitetskaya Sq. 1, 394018 Voronezh, Russia
| | - Khidmet S. Shikhaliev
- Department of Organic Chemistry, Faculty of Chemistry, Voronezh State University, Universitetskaya Sq. 1, 394018 Voronezh, Russia
- TekhnoKhim, 50 Let Sovetskoi Vlasti Str. 8, 394050 Voronezh, Russia
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10
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Facile fabrication of durable antibacterial and anti-felting wool fabrics with enhanced comfort via novel N-phenylmaleimide finishing. Bioprocess Biosyst Eng 2022; 45:921-929. [DOI: 10.1007/s00449-022-02710-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/12/2022] [Indexed: 11/02/2022]
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11
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Vargas DF, Kaufman TS, Larghi EL. Total Synthesis of Aqabamycin G, a Nitrophenyl Indolylmaleimide Marine Alkaloid from Vibrio sp. WMBA. J Org Chem 2022; 87:13494-13500. [PMID: 35324169 DOI: 10.1021/acs.joc.2c00063] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of the marine alkaloid aqabamycin G is disclosed. The synthetic sequence involved the stepwise addition to maleimide of an indole motif and a substituted diazo-benzenoid unit derived from acetaminophen. An alternative strategy using a protected phenol is also reported.
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Affiliation(s)
- Didier F Vargas
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
| | - Enrique L Larghi
- Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, S2002LRK Rosario, Argentina
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12
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Zhang M, Feng T, Wu H, Ma W, Wang Z, Wang C, Wang Y, Wang S, Lin HL. An injectable thermosensitive hydrogel with self-assembled peptide coupled with antimicrobial peptide for enhanced wound healing. J Mater Chem B 2022; 10:6143-6157. [DOI: 10.1039/d2tb00644h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Wound dressing based on thermosensitive hydrogel shows advantages over performed traditional dressings such as rapid reversible sol-gel-sol transition property and the capacity of filling the irregular wound area. Herein, RA-Amps...
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