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Ramirez E, Ganegamage SK, Min S, Patel H, Ogunware A, Plascencia-Villa G, Alnakhala H, Shimanaka K, Tripathi A, Wang KW, Zhu X, Rochet JC, Kuo MH, Counts SE, Perry G, Dettmer U, Lasagna-Reeves CA, Fortin JS. Evaluation of N- and O-Linked Indole Triazines for a Dual Effect on α-Synuclein and Tau Aggregation. ACS Chem Neurosci 2023; 14:3913-3927. [PMID: 37818657 PMCID: PMC10624178 DOI: 10.1021/acschemneuro.3c00464] [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: 07/31/2023] [Accepted: 09/12/2023] [Indexed: 10/12/2023] Open
Abstract
Alzheimer's disease (AD) is the most prevalent neurodegenerative disorder underlying dementia in the geriatric population. AD manifests by two pathological hallmarks: extracellular amyloid-β (Aβ) peptide-containing senile plaques and intraneuronal neurofibrillary tangles comprised of aggregated hyperphosphorylated tau protein (p-tau). However, more than half of AD cases also display the presence of aggregated α-synuclein (α-syn)-containing Lewy bodies. Conversely, Lewy bodies disorders have been reported to have concomitant Aβ plaques and neurofibrillary tangles. Our drug discovery program focuses on the synthesis of multitarget-directed ligands to abrogate aberrant α-syn, tau (2N4R), and p-tau (1N4R) aggregation and to slow the progression of AD and related dementias. To this end, we synthesized 11 compounds with a triazine-linker and evaluated their effectiveness in reducing α-syn, tau isoform 2N4R, and p-tau isoform 1N4R aggregation. We utilized biophysical methods such as thioflavin T (ThT) fluorescence assays, transmission electron microscopy (TEM), photoinduced cross-linking of unmodified proteins (PICUP), and M17D intracellular inclusion cell-based assays to evaluate the antiaggregation properties and cellular protection of our best compounds. We also performed disaggregation assays with isolated Aβ-plaques from human AD brains. Our results demonstrated that compound 10 was effective in reducing both oligomerization and fibril formation of α-syn and tau isoform 2N4R in a dose-dependent manner via ThT and PICUP assays. Compound 10 was also effective at reducing the formation of recombinant α-syn, tau 2N4R, and p-tau 1N4R fibrils by TEM. Compound 10 reduced the development of α-syn inclusions in M17D neuroblastoma cells and stopped the seeding of tau P301S using biosensor cells. Disaggregation experiments showed smaller Aβ-plaques and less paired helical filaments with compound 10. Compound 10 may provide molecular scaffolds for further optimization and preclinical studies for neurodegenerative proteinopathies.
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Affiliation(s)
- Eduardo Ramirez
- Department
of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907, United States
| | - Susantha K. Ganegamage
- Department
of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sehong Min
- Department
of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Henika Patel
- Department
of Anatomy Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Adedayo Ogunware
- Department
of Neuroscience, Developmental and Regenerative Biology, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Germán Plascencia-Villa
- Department
of Neuroscience, Developmental and Regenerative Biology, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Heba Alnakhala
- Ann
Romney
Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Kazuma Shimanaka
- Ann
Romney
Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Arati Tripathi
- Ann
Romney
Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Kuang-Wei Wang
- Department
of Biochemistry and Molecular Biology, College of Natural Science, Michigan State University, East Lansing, Michigan 48824, United States
| | - Xiongwei Zhu
- Department
of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Jean-Christophe Rochet
- Department
of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Min-Hao Kuo
- Department
of Biochemistry and Molecular Biology, College of Natural Science, Michigan State University, East Lansing, Michigan 48824, United States
| | - Scott E. Counts
- Department
of Translational Neuroscience, College of Human Medicine, Michigan State University, Grand Rapids, Michigan 49503, United States
| | - George Perry
- Department
of Neuroscience, Developmental and Regenerative Biology, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Ulf Dettmer
- Ann
Romney
Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical
School, Boston, Massachusetts 02115, United States
| | - Cristian A. Lasagna-Reeves
- Department
of Anatomy Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202, United States
| | - Jessica S. Fortin
- Department
of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907, United States
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Ali MI, Naseer MM. Recent biological applications of heterocyclic hybrids containing s-triazine scaffold. RSC Adv 2023; 13:30462-30490. [PMID: 37854486 PMCID: PMC10580144 DOI: 10.1039/d3ra05953g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 10/04/2023] [Indexed: 10/20/2023] Open
Abstract
s-Triazine possesses an auspicious status in the field of drug discovery and development owing to its presence in many naturally occurring compounds as well as commercially available drugs like enasidenib, gedatolisib, bimiralisib, atrazine, indaziflam, and triaziflam. Easy, cost-effective, and efficient access to its derivatives in addition to their splendid biological activities such as anticancer, anti-inflammatory, antiviral, anticonvulsant, anti-tubercular, antidiabetic, antimicrobial, makes it an attractive heterocyclic nucleus in the field of medicinal chemistry. Other than the direct access of its derivatives from simple commercially available starting materials like amidine, the s-triazine derivatives have also been obtained starting from an inexpensive commercially available 2,4,6-trichloro-1,3,5-triazine (TCT) commonly known as cyanuric chloride. Owing to the high reactivity and the possibility of sequential substitution of TCT, a variety of biologically active heterocyclic scaffolds have been installed on this nucleus in order to have more potent compounds. These s-triazine-based heterocyclic hybrids have been reported to show enhanced biological activities in recent years. Therefore, it is important to summarize and highlight recent examples of these hybrids which is imperative to attract the attention of the drug development community.
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Affiliation(s)
- Muhammad Imran Ali
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan +92-5190642241 +92-5190642129
| | - Muhammad Moazzam Naseer
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan +92-5190642241 +92-5190642129
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Drozdowska D, Maliszewski D, Wróbel A, Ratkiewicz A, Sienkiewicz M. New Benzamides as Multi-Targeted Compounds: A Study on Synthesis, AChE and BACE1 Inhibitory Activity and Molecular Docking. Int J Mol Sci 2023; 24:14901. [PMID: 37834347 PMCID: PMC10573752 DOI: 10.3390/ijms241914901] [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: 09/07/2023] [Revised: 09/29/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
The synthesis of eleven new and previously undescribed benzamides was designed. These compounds were specifically projected as potential inhibitors of the enzymes acetylcholinesterase (AChE) and β-secretase (BACE1). N,N'-(1,4-phenylene)bis(3-methoxybenzamide) was most active against AChE, with an inhibitory concentration of AChE IC50 = 0.056 µM, while the IC50 for donepezil was 0.046 µM. This compound was also the most active against the BACE1 enzyme. The IC50 value was 9.01 µM compared to that for quercetin, with IC50 = 4.89 µM. Quantitative results identified this derivative to be the most promising. Molecular modeling was performed to elucidate the potential mechanism of action of this compound. Dynamic simulations showed that new ligands only had a limited stabilizing effect on AChE, but all clearly reduced the flexibility of the enzyme. It can, therefore, be concluded that a possible mechanism of inhibition increases the stiffness and decreases the flexibility of the enzyme, which obviously impedes its proper function. An analysis of the H-bonding patterns suggests a different mechanism (from other ligands) when interacting the most active derivative with the enzyme.
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Affiliation(s)
- Danuta Drozdowska
- Department of Organic Chemistry, Medical University of Białystok, Mickiewicza Street 2A, 15-222 Białystok, Poland; (D.M.); (A.W.)
| | - Dawid Maliszewski
- Department of Organic Chemistry, Medical University of Białystok, Mickiewicza Street 2A, 15-222 Białystok, Poland; (D.M.); (A.W.)
| | - Agnieszka Wróbel
- Department of Organic Chemistry, Medical University of Białystok, Mickiewicza Street 2A, 15-222 Białystok, Poland; (D.M.); (A.W.)
| | - Artur Ratkiewicz
- Department of Physical Chemistry, Faculty of Chemistry, University of Białystok, Ciołkowskiego 1K Street, 15-245 Białystok, Poland; (A.R.); (M.S.)
| | - Michał Sienkiewicz
- Department of Physical Chemistry, Faculty of Chemistry, University of Białystok, Ciołkowskiego 1K Street, 15-245 Białystok, Poland; (A.R.); (M.S.)
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Maliszewski D, Demirel R, Wróbel A, Baradyn M, Ratkiewicz A, Drozdowska D. s-Triazine Derivatives Functionalized with Alkylating 2-Chloroethylamine Fragments as Promising Antimicrobial Agents: Inhibition of Bacterial DNA Gyrases, Molecular Docking Studies, and Antibacterial and Antifungal Activity. Pharmaceuticals (Basel) 2023; 16:1248. [PMID: 37765056 PMCID: PMC10650753 DOI: 10.3390/ph16091248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023] Open
Abstract
The spectrum of biological properties of s-triazine derivatives is broad and includes anti-microbial, anti-cancer, and anti-neurodegenerative activities, among others. The s-triazine molecule, due to the possibility of substituting three substituents, offers many opportunities to obtain hybrid compounds with a wide variety of activities. A group of 1,3,5 triazine derivatives containing a dipeptide, 2-ethylpiperazine, and a methoxy group as substituents was screened for their antimicrobial activity. An in vitro study was conducted on pathogenic bacteria (E. coli, S. aureus, B. subtilis, and M. luteus), yeasts (C. albicans), and filamentous fungi (A. fumigatus, A. flavus, F. solani, and P. citrinum) via microdilution in broth, and the results were compared with antibacterial (Streptomycin) and antifungal (Ketoconazole and Nystatin) antibiotics. Several s-triazine analogues have minimal inhibitory concentrations lower than the standard. To confirm the inhibitory potential of the most active compounds against gyrases E. coli and S. aureus, a bacterial gyrases inhibition assay, and molecular docking studies were performed. The most active s-triazine derivatives contained the -NH-Trp(Boc)-AlaOMe, -NH-Asp(OtBu)-AlaOMe, and -NH-PheOMe moieties in their structures.
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Affiliation(s)
- Dawid Maliszewski
- Department of Organic Chemistry, Medical University of Bialystok, 15-089 Bialystok, Poland; (D.M.); (A.W.)
| | - Rasime Demirel
- Department of Biology, Eskisehir Technical University, Eskişehir 26555, Turkey;
| | - Agnieszka Wróbel
- Department of Organic Chemistry, Medical University of Bialystok, 15-089 Bialystok, Poland; (D.M.); (A.W.)
| | - Maciej Baradyn
- Faculty of Chemistry, University of Bialystok, 15-245 Bialystok, Poland; (M.B.); (A.R.)
| | - Artur Ratkiewicz
- Faculty of Chemistry, University of Bialystok, 15-245 Bialystok, Poland; (M.B.); (A.R.)
| | - Danuta Drozdowska
- Department of Organic Chemistry, Medical University of Bialystok, 15-089 Bialystok, Poland; (D.M.); (A.W.)
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Kim MY, Kim S, Lee J, Kim JI, Oh E, Kim SW, Lee E, Cho KS, Kim CS, Lee MH. Lignan-Rich Sesame ( Sesamum indicum L.) Cultivar Exhibits In Vitro Anti-Cholinesterase Activity, Anti-Neurotoxicity in Amyloid-β Induced SH-SY5Y Cells, and Produces an In Vivo Nootropic Effect in Scopolamine-Induced Memory Impaired Mice. Antioxidants (Basel) 2023; 12:antiox12051110. [PMID: 37237976 DOI: 10.3390/antiox12051110] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/28/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
Alzheimer's disease, a major cause of dementia, is characterized by impaired cholinergic function, increased oxidative stress, and amyloid cascade induction. Sesame lignans have attracted considerable attention owing to their beneficial effects on brain health. This study investigated the neuroprotective potential of lignan-rich sesame cultivars. Among the 10 sesame varieties studied, Milyang 74 (M74) extracts exhibited the highest total lignan content (17.71 mg/g) and in vitro acetylcholinesterase (AChE) inhibitory activity (66.17%, 0.4 mg/mL). M74 extracts were the most effective in improving cell viability and inhibiting reactive oxygen species (ROS) and malondialdehyde (MDA) generation in amyloid-β25-35 fragment-treated SH-SY5Y cells. Thus, M74 was used to evaluate the nootropic effects of sesame extracts and oil on scopolamine (2 mg/kg)-induced memory impairment in mice compared to the control cultivar (Goenback). Pretreatment with the M74 extract (250 and 500 mg/kg) and oil (1 and 2 mL/kg) effectively improved memory disorder in mice (demonstrated by the passive avoidance test), inhibited AChE, and enhanced acetylcholine (Ach) levels. Moreover, immunohistochemistry and Western blot results showed that the M74 extract and oil reversed the scopolamine-induced increase in APP, BACE-1, and presenilin expression levels in the amyloid cascade and decreased BDNF and NGF expression levels in neuronal regeneration.
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Affiliation(s)
- Min-Young Kim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Sungup Kim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Jeongeun Lee
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Jung-In Kim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Eunyoung Oh
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Sang-Woo Kim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Eunsoo Lee
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Kwang-Soo Cho
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Choon-Song Kim
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
| | - Myoung-Hee Lee
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Milyang 50424, Republic of Korea
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Theerasri A, Janpaijit S, Tencomnao T, Prasansuklab A. Beyond the classical amyloid hypothesis in Alzheimer's disease: Molecular insights into current concepts of pathogenesis, therapeutic targets, and study models. WIREs Mech Dis 2023; 15:e1591. [PMID: 36494193 DOI: 10.1002/wsbm.1591] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease (AD) is one of the progressive neurodegenerative disorders and the most common cause of dementia in the elderly worldwide causing difficulties in the daily life of the patient. AD is characterized by the aberrant accumulation of β-amyloid plaques and tau protein-containing neurofibrillary tangles (NFTs) in the brain giving rise to neuroinflammation, oxidative stress, synaptic failure, and eventual neuronal cell death. The total cost of care in AD treatment and related health care activities is enormous and pharmaceutical drugs approved by Food and Drug Administration have not manifested sufficient efficacy in protection and therapy. In recent years, there are growing studies that contribute a fundamental understanding to AD pathogenesis, AD-associated risk factors, and pharmacological intervention. However, greater molecular process-oriented research in company with suitable experimental models is still of the essence to enhance the prospects for AD therapy and cell lines as a disease model are still the major part of this milestone. In this review, we provide an insight into molecular mechanisms, particularly the recent concept in gut-brain axis, vascular dysfunction and autophagy, and current models used in the study of AD. Here, we emphasized the importance of therapeutic strategy targeting multiple mechanisms together with utilizing appropriate models for the discovery of novel effective AD therapy. This article is categorized under: Neurological Diseases > Molecular and Cellular Physiology.
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Affiliation(s)
- Atsadang Theerasri
- Graduate Program in Clinical Biochemistry and Molecular Medicine, Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand.,Natural Products for Neuroprotection and Anti-ageing Research Unit, Chulalongkorn University, Bangkok, Thailand
| | - Sakawrat Janpaijit
- Graduate Program in Clinical Biochemistry and Molecular Medicine, Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand.,Natural Products for Neuroprotection and Anti-ageing Research Unit, Chulalongkorn University, Bangkok, Thailand
| | - Tewin Tencomnao
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Chulalongkorn University, Bangkok, Thailand.,Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Anchalee Prasansuklab
- Natural Products for Neuroprotection and Anti-ageing Research Unit, Chulalongkorn University, Bangkok, Thailand.,College of Public Health Sciences, Chulalongkorn University, Bangkok, Thailand
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Liang Y, Liang M, Li C, Wang D, Gong X, Zheng K. Synthesis of nitrogen mustard-based fluorophores for cell imaging and cytotoxicity studies. J Adv Pharm Technol Res 2023; 14:6-11. [PMID: 36950465 PMCID: PMC10026329 DOI: 10.4103/japtr.japtr_574_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 09/27/2022] [Accepted: 10/19/2022] [Indexed: 03/24/2023] Open
Abstract
Nitrogen mustards are important alkylating anticancer drugs used for neoplasms treatment. However, little research about the integration of luminophore into nitrogen mustard-based compounds for both imaging and therapeutic application was reported. In this study, we report a series of novel nitrogen mustard-containing 1-furyl-2-en-1-one and 1-thienyl-2-en-1-one derivatives as intramolecular charge transfer-based luminophore for research in both imaging subcellular localization and antiproliferation toward lung cancer cells. The target products were prepared by Knoevenagel condensation and characterized by nuclear magnetic resonance and high-resolution mass spectrometer. The absorption and fluorescence studies were carried out by ultraviolet-visible and fluorescence spectrophotometers, respectively. Cell morphology was observed under an inverted microscope. Cytotoxicity test was detected by MTT assay. Cellular localization was observed by a confocal laser scanning microscope. Colony formation ability was carried out by colony formation assay. Cell migration ability was detected by transwell migration assay. Differences between the two groups were analyzed by two-tailed Student's t-test. The difference with P < 0.05 (*) was considered statistically significant. The compounds were synthesized in high yield. The λmax and Stokes shift of these compounds reach up to 567 and 150 nm, respectively. These compounds exhibited good antiproliferative activity against lung cancer cells, with compound 3h exhibiting the best IC50 of 13.1 ± 2.7 μM. Furthermore, the selected compound 3h is located preferentially in lysosomes and a small amount in nuclei, effectively inhibiting cell colony formation and migration abilities toward A549 cells. These findings suggested that nitrogen mustard-based fluorophores might be a potential effective chemotherapeutic agent in lung cancer therapy.
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Affiliation(s)
- Yuanwei Liang
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
| | - Maojun Liang
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
| | - Cuiyu Li
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
| | - Daini Wang
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
| | - Xiaoxuan Gong
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
| | - Kaiji Zheng
- Department of Chemistry, Guangdong Ocean University, Zhanjiang, China
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Nanomedicines Bearing an Alkylating Cytostatic Drug from the Group of 1,3,5-Triazine Derivatives: Development and Characterization. Pharmaceutics 2022; 14:pharmaceutics14112506. [PMID: 36432699 PMCID: PMC9694467 DOI: 10.3390/pharmaceutics14112506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 11/22/2022] Open
Abstract
Cancer is still one of the major diseases worldwide. The discovery of new drugs and the improvement of existing ones is one of the areas of priority in the fight against cancer. Dioxadet ([5-[[4,6-bis(aziridin-1-yl)-1,3,5-triazin-2-yl]amino]-2,2-dimethyl-1,3-dioxan-5-yl]methanol) represents one of the promising 1,3,5-triazine derivatives and has cytostatic activity towards ovarian cancer. In this study, we first report the development of dioxadet-bearing nanomedicines based on block-copolymers of poly(ethylene glycol) monomethyl ether (mPEG) and poly(D,L-lactic acid) (PLA)/poly(ε-caprolactone) (PCL) and then conduct an investigation into their characteristics and properties. The preparation of narrow-sized nanoparticles with a hydrodynamic diameter of 100−120 nm was optimized using a nanoprecipitation approach. Thoughtful optimization of the preparation of nanomedicines was carried out through adjustments to the polymer’s molecular weight, the pH of the aqueous medium used for nanoprecipitation, the initial drug amount in respect to the polymer, and polymer concentration in the organic phase. Under optimized conditions, spherical-shaped nanomedicines with a hydrodynamic diameter of up to 230 nm (PDI < 0.2) containing up to 592 ± 22 μg of dioxadet per mg of polymer nanoparticles were prepared. Study of the drug’s release in a model medium revealed the release up to 64% and 46% of the drug after 8 days for mPEG-b-PLA and mPEG-b-PCL, respectively. Deep analysis of the release mechanisms was carried out with the use of a number of mathematical models. The developed nanoparticles were non-toxic towards both normal (CHO-K1) and cancer (A2780 and SK-OV-3) ovarian cells. A cell cycle study revealed lesser toxicity of nanomedicines towards normal cells and increased toxicity towards cancer cells. The IC50 values determined for dioxadet nanoformulations were in the range of 0.47−4.98 μg/mL for cancer cells, which is close to the free drug’s efficacy (2.60−4.14 μg/mL). The highest cytotoxic effect was found for dioxadet loaded to mPEG-b-PCL nanoparticles.
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Kaur G, Goyal B. Deciphering the Molecular Mechanism of Inhibition of β‐Secretase (BACE1) Activity by a 2‐Amino‐imidazol‐4‐one Derivative. ChemistrySelect 2022. [DOI: 10.1002/slct.202202561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gurmeet Kaur
- School of Chemistry & Biochemistry Thapar Institute of Engineering & Technology Patiala 147004 Punjab India
| | - Bhupesh Goyal
- School of Chemistry & Biochemistry Thapar Institute of Engineering & Technology Patiala 147004 Punjab India
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Obaid RJ, Mughal EU, Naeem N, Al-Rooqi MM, Sadiq A, Jassas RS, Moussa Z, Ahmed SA. Pharmacological significance of nitrogen-containing five and six-membered heterocyclic scaffolds as potent cholinesterase inhibitors for drug discovery. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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