1
|
Shen H, Ji A, Li Q, Li X, Ma Y. Tensile mechanical properties and finite element simulation of the wings of the butterfly Tirumala limniace. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2023; 209:239-251. [PMID: 35840718 DOI: 10.1007/s00359-022-01556-z] [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: 10/13/2021] [Revised: 05/19/2022] [Accepted: 05/21/2022] [Indexed: 11/28/2022]
Abstract
This study examined the morphological characteristics and mechanical properties of the wings of Tirumala limniace. The wings of this butterfly, including the forewings and hindwings, are composed mainly of a flexible wing membrane and supporting wing veins. Scanning electron microscopy was employed to observe specific positions of the wing membrane and veins and reveal the morphological characteristics. Tensile experiments were conducted to evaluate the mechanical properties of the wings and proved that the multifiber layer structures have a significantly fixed orientation of fiber alignment. A butterfly wing model reconstructed in reverse based on the finite element method was used to analyze the static characteristics of the wing structure in detail. Evaluation of stress and strain after applying uniform loading, perpendicular loading, and torsion revealed that minor wing deformation occurred and was concentrated near the main wing vein, which verifies the steadiness of the butterfly wing structure. Additionally, the flapping of butterfly wings was simulated using computational fluid dynamics to study the flow field near the butterfly wings and the distribution of pressure gradient on the wings. The results confirmed the effect of wing veins on maintaining the flight performance.
Collapse
Affiliation(s)
- Huan Shen
- Institute of Bio-Inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China
| | - Aihong Ji
- Institute of Bio-Inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China.
| | - Qian Li
- Institute of Bio-Inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China
| | - Xin Li
- School of Mechanical and Electrical Engineering, Suqian University, Suqian, 223800, China
| | - Yaopeng Ma
- Institute of Bio-Inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China
| |
Collapse
|
2
|
Wang XT, Deng X, Zhang TD, Zhang J, Chen LL, Wang YF, Cao X, Zhang YZ, Zheng X, Yin DC. A Versatile Hydrophilic and Antifouling Coating Based on Dopamine Modified Four-Arm Polyethylene Glycol by One-Step Synthesis Method. ACS Macro Lett 2022; 11:805-812. [PMID: 35666550 DOI: 10.1021/acsmacrolett.2c00277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A versatile hydrophilic and antifouling coating was designed and prepared based on catechol-modified four-arm polyethylene glycol. The dopamine (DA) molecules were grafted onto the end of the four-arm polyethylene glycol carboxyl (4A-PEG-COOH) through the amidation reaction, which was proven by 1H NMR and FTIR analysis, assisting the strong adhesion of PEG on the surface of various types of materials, including metallic, inorganic, and polymeric materials. The reduction of the water contact angle and the bacteria-repellent and protein-repellent effects indicated that the coating had good hydrophilicity and antifouling performance. Raman spectroscopy analysis demonstrated the affinity between the polymeric surface and water, which further confirmed the hydrophilicity of the coating. Finally, in vitro cytotoxicity assay demonstrated good biocompatibility of the coating layer.
Collapse
Affiliation(s)
- Xue-Ting Wang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xudong Deng
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China
| | - Tuo-Di Zhang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.,Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - Jie Zhang
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China
| | - Liang-Liang Chen
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yi-Fan Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
| | - Xin Cao
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
| | - Yao-Zhong Zhang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
| | - Xing Zheng
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
| | - Da-Chuan Yin
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China
| |
Collapse
|
3
|
Mao LY, Xu JY, Shi L, Zheng WH, Liu JS. Food restriction decreases thermoregulation in the silky starling Sturnus sericeus (Aves: Passeriformes). THE EUROPEAN ZOOLOGICAL JOURNAL 2019. [DOI: 10.1080/24750263.2019.1665114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- L.-Y. Mao
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| | - J.-Y. Xu
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| | - L. Shi
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| | - W.-H. Zheng
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| | - J.-S. Liu
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| |
Collapse
|
4
|
Antillón A, de Vries AH, Espinosa-Caballero M, Falcón-González JM, Flores Romero D, González–Damián J, Jiménez-Montejo FE, León-Buitimea A, López-Ortiz M, Magaña R, Marrink SJ, Morales-Nava R, Periole X, Reyes-Esparza J, Rodríguez Lozada J, Santiago-Angelino TM, Vargas González MC, Regla I, Carrillo-Tripp M, Fernández-Zertuche M, Rodríguez-Fragoso L, Ortega-Blake I. An Amphotericin B Derivative Equally Potent to Amphotericin B and with Increased Safety. PLoS One 2016; 11:e0162171. [PMID: 27683101 PMCID: PMC5040443 DOI: 10.1371/journal.pone.0162171] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 08/16/2016] [Indexed: 11/18/2022] Open
Abstract
Amphotericin B is the most potent antimycotic known to date. However due to its large collateral toxicity, its use, although long standing, had been limited. Many attempts have been made to produce derivatives with reduced collateral damage. The molecular mechanism of polyene has also been closely studied for this purpose and understanding it would contribute to the development of safe derivatives. Our study examined polyene action, including chemical synthesis, electrophysiology, pharmacology, toxicology and molecular dynamics. The results were used to support a novel Amphotericin B derivative with increased selectivity: L-histidine methyl ester of Amphotericin B. We found that this derivative has the same form of action as Amphotericin B, i.e. pore formation in the cell membrane. Its reduced dimerization in solution, when compared to Amphotericin B, is at least partially responsible for its increased selectivity. Here we also present the results of preclinical tests, which show that the derivative is just as potent as Amphotericin B and has increased safety.
Collapse
Affiliation(s)
- Armando Antillón
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apartado Postal 48-3, 62251, Cuernavaca, Morelos, México
| | - Alexander H. de Vries
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Marcel Espinosa-Caballero
- Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida. Km 6, Carretera Antigua a Progreso, Cordemex, 97310, Mérida, Yucatán, México
| | - José Marcos Falcón-González
- Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Irapuato, km 9.6 Libramiento Norte, Carretera Irapuato-León, Irapuato, Guanajuato 36821, México
| | - David Flores Romero
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Javier González–Damián
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apartado Postal 48-3, 62251, Cuernavaca, Morelos, México
| | - Fabiola Eloísa Jiménez-Montejo
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Angel León-Buitimea
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Manuel López-Ortiz
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Batalla del 5 de Mayo y Fuerte de Loreto México DF, 09230, México City, México
| | - Ricardo Magaña
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Batalla del 5 de Mayo y Fuerte de Loreto México DF, 09230, México City, México
| | - Siewert J. Marrink
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Rosmarbel Morales-Nava
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apartado Postal 48-3, 62251, Cuernavaca, Morelos, México
| | - Xavier Periole
- Groningen Biomolecular Sciences and Biotechnology Institute & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Jorge Reyes-Esparza
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Josué Rodríguez Lozada
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Tania Minerva Santiago-Angelino
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - María Cristina Vargas González
- Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida. Km 6, Carretera Antigua a Progreso, Cordemex, 97310, Mérida, Yucatán, México
| | - Ignacio Regla
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Batalla del 5 de Mayo y Fuerte de Loreto México DF, 09230, México City, México
| | - Mauricio Carrillo-Tripp
- Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Irapuato, km 9.6 Libramiento Norte, Carretera Irapuato-León, Irapuato, Guanajuato 36821, México
| | - Mario Fernández-Zertuche
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Lourdes Rodríguez-Fragoso
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa Cuernavaca, Morelos, México
| | - Iván Ortega-Blake
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Apartado Postal 48-3, 62251, Cuernavaca, Morelos, México
- * E-mail:
| |
Collapse
|
5
|
Mushtaq S, Dogra D, Dogra N. Clinical Response with intralesional Amphotericin B in the treatment of old world cutaneous leishmaniasis: a preliminary report. Dermatol Ther 2016; 29:398-405. [PMID: 27477764 DOI: 10.1111/dth.12377] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cutaneous leishmaniasis (CL) is a vector-borne tropical disease caused by a heterogeneous group of protozoan parasites that belong to the genus Leishmania. With an annual incidence of 1.5 million new cases, CL is a global health concern mainly in developing countries. The treatment options for CL are numerous but none is optimal. Pentavalent antimonials despite their side effects remain the preferred choice since decades. Alternate new treatment options are being explored to expand the therapeutic armamentarium of CL. In this study, we intend to describe our therapeutic experience with intralesional amphotericin B in the treatment of CL in a series of Indian patients, hitherto not commonly used in old world CL (OWCL). We also endeavour to review the literature on the use of amphotericin B in OWCL. Five consecutive patients diagnosed with cutaneous leishmansis at the out-patient department of Dermatology, Government Medical College, Jammu were treated with weekly injections of intralesional amphotericin B (2.5 mg/mL). Treatment response was assessed at each visit and the cases were followed up for 6 months. All the five patients responded well to the treatment and remained recurrence-free during follow-up. Intralesional amphotericin B was found to be safe and effective treatment for OWCL. Large randomized control trials need to be conducted to establish its efficacy.
Collapse
Affiliation(s)
- Sabha Mushtaq
- Department of Dermatology, Venereology & Leprology, SMGS Hospital, Government Medical College, Jammu, Jammu & Kashmir, India
| | - Devraj Dogra
- Department of Dermatology, Venereology & Leprology, SMGS Hospital, Government Medical College, Jammu, Jammu & Kashmir, India
| | - Naina Dogra
- Department of Dermatology, Venereology & Leprology, SMGS Hospital, Government Medical College, Jammu, Jammu & Kashmir, India
| |
Collapse
|
6
|
Mobasheri M, Attar H, Rezayat Sorkhabadi SM, Khamesipour A, Jaafari MR. Solubilization Behavior of Polyene Antibiotics in Nanomicellar System: Insights from Molecular Dynamics Simulation of the Amphotericin B and Nystatin Interactions with Polysorbate 80. Molecules 2015; 21:E6. [PMID: 26712721 PMCID: PMC6273564 DOI: 10.3390/molecules21010006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 01/23/2023] Open
Abstract
Amphotericin B (AmB) and Nystatin (Nys) are the drugs of choice for treatment of systemic and superficial mycotic infections, respectively, with their full clinical potential unrealized due to the lack of high therapeutic index formulations for their solubilized delivery. In the present study, using a coarse-grained (CG) molecular dynamics (MD) simulation approach, we investigated the interaction of AmB and Nys with Polysorbate 80 (P80) to gain insight into the behavior of these polyene antibiotics (PAs) in nanomicellar solution and derive potential implications for their formulation development. While the encapsulation process was predominantly governed by hydrophobic forces, the dynamics, hydration, localization, orientation, and solvation of PAs in the micelle were largely controlled by hydrophilic interactions. Simulation results rationalized the experimentally observed capability of P80 in solubilizing PAs by indicating (i) the dominant kinetics of drugs encapsulation over self-association; (ii) significantly lower hydration of the drugs at encapsulated state compared with aggregated state; (iii) monomeric solubilization of the drugs; (iv) contribution of drug-micelle interactions to the solubilization; (v) suppressed diffusivity of the encapsulated drugs; (vi) high loading capacity of the micelle; and (vii) the structural robustness of the micelle against drug loading. Supported from the experimental data, our simulations determined the preferred location of PAs to be the core-shell interface at the relatively shallow depth of 75% of micelle radius. Deeper penetration of PAs was impeded by the synergistic effects of (i) limited diffusion of water; and (ii) perpendicular orientation of these drug molecules with respect to the micelle radius. PAs were solvated almost exclusively in the aqueous poly-oxyethylene (POE) medium due to the distance-related lack of interaction with the core, explaining the documented insensitivity of Nys solubilization to drug-core compatibility in detergent micelles. Based on the obtained results, the dearth of water at interior sites of micelle and the large lateral occupation space of PAs lead to shallow insertion, broad radial distribution, and lack of core interactions of the amphiphilic drugs. Hence, controlled promotion of micelle permeability and optimization of chain crowding in palisade layer may help to achieve more efficient solubilization of the PAs.
Collapse
Affiliation(s)
- Meysam Mobasheri
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
| | - Hossein Attar
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
- Tofigh Daru Research and Engineering Company (TODACO), Tehran 1397116359, Iran.
| | - Seyed Mehdi Rezayat Sorkhabadi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran 1417755469, Iran.
- Department of Toxicology and Pharmacology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran 193956466, Iran.
| | - Ali Khamesipour
- Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran 1416613675, Iran.
| | - Mahmoud Reza Jaafari
- Biotechnology Research Center, Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, P. O. Box: 91775-1365, Mashhad 917751365, Iran.
| |
Collapse
|
7
|
Belakhov VV, Garabadzhiu AV. Kabachnik-fields phosphorylation of tetaraene macrolide antibiotic pimaricin. RUSS J GEN CHEM+ 2015. [DOI: 10.1134/s1070363215020103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Lei X, Kong L, Zhang C, Liu Q, Yao F, Zhang W, Deng Z, You D. In vivo investigation of the substrate recognition capability and activity affecting amino acid residues of glycosyltransferase FscMI in the biosynthesis of candicidin. MOLECULAR BIOSYSTEMS 2013; 9:422-30. [PMID: 23324745 DOI: 10.1039/c2mb25464f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alteration of sugar moieties of natural products often leads to novel antibiotics with different chemical and physical properties. fscMI is a putative glycosyltransferase (GT) in a gene cluster for the production of candicidin, a polyene macrolide antibiotic, produced by Streptomyces sp. FR-008. In this report, we established an in vivo biochemical detection system by inactivating fscMI and the DH11 domain of polyketide synthase (PKS) through double homologous recombination to unveil the interaction between polyene GTs and their substrates. We found that homologous GT genes including amphDI, nysDI and pimK can catalyze the conversion of candicidin aglycone into candicidin/FR-008-III in fscMI mutant, suggesting that homologous polyene GTs show some tolerance toward aglycones and that it is possible to create new polyene analogues with altered aglycones through genetic engineering. Inactivation of the DH11 domain of PKS led to novel polyene derivatives with mycosamine added to the altered polyketide backbones, further confirming the loose substrate specificity of polyene GTs. Furthermore, mutation of Ser346, Ser361, His362 or Cys387 of FscMI by site-directed mutagenesis significantly reduced its catalytic activity. Further analysis suggested that Ser361 and Cys387 are likely the critical donor interacting residues that could affect the activity of GT FscMI. To our knowledge, this is the first report of the critical residues in a polyene GT.
Collapse
Affiliation(s)
- Xuan Lei
- State Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Arczewska M, Gagoś M. Molecular organization of antibiotic amphotericin B in dipalmitoylphosphatidylcholine monolayers induced by K+ and Na+ ions: The Langmuir technique study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:2706-13. [DOI: 10.1016/j.bbamem.2011.07.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 07/18/2011] [Accepted: 07/19/2011] [Indexed: 10/17/2022]
|
10
|
Neumann A, Baginski M, Czub J. How Do Sterols Determine the Antifungal Activity of Amphotericin B? Free Energy of Binding between the Drug and Its Membrane Targets. J Am Chem Soc 2010; 132:18266-72. [DOI: 10.1021/ja1074344] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Neumann
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland
| | - Maciej Baginski
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland
| | - Jacek Czub
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland
| |
Collapse
|
11
|
Spectroscopic studies of molecular organization of antibiotic amphotericin B in monolayers and dipalmitoylphosphatidylcholine lipid multibilayers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:2124-30. [PMID: 20699086 DOI: 10.1016/j.bbamem.2010.07.037] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 07/29/2010] [Accepted: 07/30/2010] [Indexed: 11/21/2022]
Abstract
Amphotericin B (AmB) is considered the gold-standard in the treatment of serious systemic mycoses despite its numerous adverse effects. Both the mechanism of antifungal action and the toxicity of this drug are dependent on its molecular organization. The effect of AmB on the organization of lipid membranes formed with dipalmitoylphosphatidylcholine (DPPC) was studied with application of the Langmuir-Blodgett technique and ATR-FTIR spectroscopy. The aim of this research was to analyze the physical interactions leading to the formation of aggregated forms of AmB molecules in one-component monolayers and lipid multibilayers. Analysis of FTIR spectra of two-component multibilayers suggests the possibility the mutual reorientation of the amino-sugar moiety (mycosamine) and macrolide ring. This effect may be significant in the explanation of the aggregation processes of AmB in biological systems.
Collapse
|
12
|
Miranzo D, Seco EM, Cuesta T, Malpartida F. Isolation and characterization of pcsB, the gene for a polyene carboxamide synthase that tailors pimaricin into AB-400. Appl Microbiol Biotechnol 2009; 85:1809-19. [PMID: 19707754 DOI: 10.1007/s00253-009-2195-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 08/06/2009] [Accepted: 08/07/2009] [Indexed: 11/25/2022]
Abstract
From cell-free extracts of Streptomyces RGU5.3, a tailoring activity of pimaricin, leading to the biosynthesis of its natural carboxamide derivative AB-400, was recently identified. The two polyene macrolides, pimaricin and AB-400, were produced in almost equal quantities and can be detected in the fermentation broth of the producer strain. This report concerns the isolation and partial characterization of the gene, polyene carboxamide synthase (pcsB), responsible for the bioconversion. The gene encoded an asparagine synthase-like protein, belonging to the type II glutamine amidotransferase family, and was named pcsB. The fermentation broth of a recombinant strain carrying the engineered pcsB gene under the control of the inducible tipA promoter within an integrative vector produces the carboxamide AB-400 as the main polyene macrolide.
Collapse
Affiliation(s)
- Domingo Miranzo
- Centro Nacional de Biotecnología del CSIC, Campus de la UAM, Darwin 3, Cantoblanco, 28049 Madrid, Spain
| | | | | | | |
Collapse
|
13
|
Identification of functionally clustered nystatin-like biosynthetic genes in a rare actinomycetes, Pseudonocardia autotrophica. J Ind Microbiol Biotechnol 2009; 36:1425-34. [PMID: 19697072 DOI: 10.1007/s10295-009-0629-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Accepted: 07/27/2009] [Indexed: 02/07/2023]
Abstract
The polyene antibiotics, including nystatin, pimaricin, amphotericin, and candicidin, comprise a family of very valuable antifungal polyketide compounds, and they are typically produced by soil actinomycetes. Previously, using a polyene cytochrome P450 hydroxylase-specific genome screening strategy, Pseudonocardia autotrophica KCTC9441 was determined to contain genes potentially encoding polyene biosynthesis. Here, sequence information of an approximately 125.7-kb contiguous DNA region in five overlapping cosmids isolated from the P. autotrophica KCTC9441 genomic library revealed a total of 23 open reading frames, which are presumably involved in the biosynthesis of a nystatin-like compound tentatively named NPP. The deduced roles for six multi-modular polyketide synthase (PKS) catalytic domains were found to be highly homologous to those of previously identified nystatin biosynthetic genes. Low NPP productivity suggests that the functionally clustered NPP biosynthetic pathway genes are tightly regulated in P. autotrophica. Disruption of a NPP PKS gene completely abolished both NPP biosynthesis and antifungal activity against Candida albicans, suggesting that polyene-specific genome screening may constitute an efficient method for isolation of potentially valuable previously identified polyene genes and compounds from various rare actinomycetes widespread in nature.
Collapse
|
14
|
Kasai Y, Matsumori N, Umegawa Y, Matsuoka S, Ueno H, Ikeuchi H, Oishi T, Murata M. Self-Assembled Amphotericin B Is Probably Surrounded by Ergosterol: Bimolecular Interactions as Evidenced by Solid-State NMR and CD Spectra. Chemistry 2008; 14:1178-85. [DOI: 10.1002/chem.200701256] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
15
|
Czub J, Borowski E, Baginski M. Interactions of amphotericin B derivatives with lipid membranes—A molecular dynamics study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:2616-26. [PMID: 17662232 DOI: 10.1016/j.bbamem.2007.06.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 06/15/2007] [Accepted: 06/15/2007] [Indexed: 11/21/2022]
Abstract
Amphotericin B (AmB) is a well-known polyene macrolide antibiotic used to treat systemic fungal infections. AmB targets more efficiently fungal than animal membranes. However, there are only minor differences in the mode of action of AmB against both types of membranes, which is a source of AmB toxicity. In this work, we analyzed interactions of two low toxic derivatives of AmB (SAmE and PAmE), synthesized in our laboratory, with lipid membranes. Molecular dynamics simulations of the lipid bilayers containing ergosterol (fungal cells) or cholesterol (animal cells) and the studied antibiotic molecules were performed to compare the structural and dynamic properties of AmB derivatives and the parent drug inside the membrane. A number of differences was found for AmB and its derivatives' behavior in cholesterol- and ergosterol-containing membranes. We found that PAmE and SAmE can penetrate deeper into the hydrophobic region of the membrane compared to AmB. Modification of the amino and carboxyl group of AmB also resulted in the conformational transition within the antibiotic's polar head. Wobbling dynamics differentiation, depending on the sterol present, was discovered for the AmB derivatives. These differences may be interpreted as molecular factors responsible for the improved selectivity observed macroscopically for the studied AmB derivatives.
Collapse
Affiliation(s)
- Jacek Czub
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-952 Gdansk, Poland
| | | | | |
Collapse
|
16
|
Isolation of putative polyene-producing actinomycetes strains via PCR-based genome screening for polyene-specific hydroxylase genes. Process Biochem 2007. [DOI: 10.1016/j.procbio.2006.06.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
17
|
Baginski M, Cybulska B, Gruszecki WI. Chapter 9 Interaction of Polyene Macrolide Antibiotics with Lipid Model Membranes. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s1554-4516(05)03009-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
|
18
|
Lee MY, Myeong JS, Park HJ, Han K, Kim ES. Isolation and partial characterization of a cryptic polyene gene cluster in Pseudonocardia autotrophica. J Ind Microbiol Biotechnol 2005; 33:84-7. [PMID: 16096834 DOI: 10.1007/s10295-005-0018-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2005] [Accepted: 07/07/2005] [Indexed: 11/24/2022]
Abstract
The polyene antibiotics, a category that includes nystatin, pimaricin, amphotericin, and candicidin, comprise a family of very promising antifungal polyketide compounds and are typically produced by soil actinomycetes. The biosynthetic gene clusters for these polyenes have been previously investigated, revealing the presence of highly similar cytochrome P450 hydroxylase (CYP) genes. Using polyene CYP-specific PCR screening with several actinomycete genomic DNAs, Pseudonocardia autotrophica was determined to contain a unique polyene-specific CYP gene. Genomic DNA library screening using the polyene-specific CYP gene probe identified a positive cosmid clone, which contained a DNA fragment of approximately 34.5 kb. The complete sequencing of this DNA fragment revealed a total of seven complete and two incomplete open reading frames, which were found to be highly similar, but still unique, when compared to previously known polyene biosynthetic genes. These results suggest that the polyene-specific screening approach may constitute an efficient method for the isolation of potentially valuable cryptic polyene biosynthetic gene clusters from various rare actinomycetes.
Collapse
Affiliation(s)
- Mi-Yeon Lee
- Department of Biotechnology, Inha University, 402-751, Incheon, Korea
| | | | | | | | | |
Collapse
|
19
|
Sternal K, Czub J, Baginski M. Molecular aspects of the interaction between amphotericin B and a phospholipid bilayer: molecular dynamics studies. J Mol Model 2004; 10:223-32. [PMID: 15118877 DOI: 10.1007/s00894-004-0190-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Accepted: 03/09/2004] [Indexed: 11/24/2022]
Abstract
Amphotericin B (AmB) is a polyene macrolide antibiotic used to treat systemic fungal infections. The molecular mechanism of AmB action is still only partly characterized. AmB interacts with cell-membrane components and forms membrane channels that eventually lead to cell death. The interaction between AmB and the membrane surface can be regarded as the first (presumably crucial) step on the way to channel formation. In this study molecular dynamics simulations were performed for an AmB-lipid bilayer model in order to characterize the molecular aspects of AmB-membrane interactions. The system studied contained a box of 200 dimyristoylphosphatidylcholine (DMPC) molecules, a single AmB molecule placed on the surface of the lipid bilayer and 8,065 water molecules. Two molecular dynamics simulations (NVT ensemble), each lasting 1 ns, were performed for the model studied. Two different programs, CHARMM and NAMD2, were used in order to test simulation conditions. The analysis of MD trajectories brought interesting information concerning interactions between polar groups of AmB and both DMPC and water molecules. Our studies show that AmB preferentially took a vertical position, perpendicular to the membrane surface, with no propensity to enter the membrane. Our finding may suggest that a single AmB molecule entering the membrane is very unlikely.
Collapse
Affiliation(s)
- Kamil Sternal
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-952 Gdansk, Poland
| | | | | |
Collapse
|
20
|
Baginski M, Resat H, Borowski E. Comparative molecular dynamics simulations of amphotericin B-cholesterol/ergosterol membrane channels. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1567:63-78. [PMID: 12488039 DOI: 10.1016/s0005-2736(02)00581-3] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Amphotericin B (AmB) is a very effective anti-fungal polyene macrolide antibiotic whose usage is limited by its toxicity. Lack of a complete understanding of AmB's molecular mechanism has impeded attempts to design less toxic AmB derivatives. The antibiotic is known to interact with sterols present in the cell membrane to form ion channels that disrupt membrane function. The slightly higher affinity of AmB toward ergosterol (dominant sterol in fungal cells) than cholesterol (mammalian sterol) is regarded as the most essential factor on which antifungal chemotherapy is based. To study these differences at the molecular level, two realistic model membrane channels containing molecules of AmB, sterol (cholesterol or ergosterol), phospholipid, and water were studied by molecular dynamics (MD) simulations. Comparative analysis of the simulation data revealed that the sterol type has noticeable effect on the properties of AmB membrane channels. In addition to having a larger size, the AmB channel in the ergosterol-containing membrane has a more pronounced pattern of intermolecular hydrogen bonds. The interaction between the antibiotic and ergosterol is more specific than between the antibiotic and cholesterol. These observed differences suggest that the channel in the ergosterol-containing membrane is more stable and, due to its larger size, would have a higher ion conductance. These observations are in agreement with experiments.
Collapse
Affiliation(s)
- Maciej Baginski
- Department of Pharmaceutical Technology and Biochemistry, Chemical Faculty, Technical University of Gdansk, Narutowicza St. 11, 80-952 Gdansk, Poland.
| | | | | |
Collapse
|
21
|
Brautaset T, Bruheim P, Sletta H, Hagen L, Ellingsen TE, Strøm AR, Valla S, Zotchev SB. Hexaene derivatives of nystatin produced as a result of an induced rearrangement within the nysC polyketide synthase gene in S. noursei ATCC 11455. CHEMISTRY & BIOLOGY 2002; 9:367-73. [PMID: 11927262 DOI: 10.1016/s1074-5521(02)00108-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Genetic manipulation of the polyketide synthase (PKS) gene nysC involved in the biosynthesis of the tetraene antifungal antibiotic nystatin yielded a recombinant strain producing hexaene nystatin derivatives. Analysis of one such compound, S48HX, by LC-MS/MS suggested that it comprises a 36-membered macrolactone ring completely decorated by the post-PKS modification enzymes. Further characterization by bioassay has shown that S48HX exhibits antifungal activity. Genetic analysis of the hexaene-producing mutant revealed an in-frame deletion within the nysC gene via recombination between two homologous ketoreductase domain-encoding sequences. Apparently, this event resulted in the elimination of one complete module from NysC PKS, subsequently leading to the production of the nystatin derivative with a contracted macrolactone ring. These results represent the first example of manipulation of a PKS gene for the biosynthesis of a polyene antibiotic.
Collapse
Affiliation(s)
- Trygve Brautaset
- Department of Biotechnology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Szlinder-Richert J, Mazerski J, Cybulska B, Grzybowska J, Borowski E. MFAME, N-methyl-N-D-fructosyl amphotericin B methyl ester, a new amphotericin B derivative of low toxicity: relationship between self-association and effects on red blood cells. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1528:15-24. [PMID: 11514093 DOI: 10.1016/s0304-4165(01)00166-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In aqueous solutions N-methyl-N-D-fructosyl amphotericin B methyl ester (MFAME), a novel amphotericin B derivative with low animal toxicity, similar to its parent antibiotic, exists in three forms: monomeric, soluble and insoluble aggregates in equilibrium [1]. The aim of our work was to examine the influence of medium composition on the MFAME self-association and the relationship between MFAME self-association and its toxicity towards red blood cells. The toxicity of MFAME in aggregated state towards red blood cells was tested by measuring the induction of potassium leakage and extent of haemolysis. The proportions of antibiotic species present in various aqueous media were determined by analysis of the UV-Vis spectra as a function of the antibiotic concentration. Numeric decomposition of the spectra allowed identification of four spectral species present in MFAME solutions: monomeric and three aggregated forms. Our results indicate that these aggregates, named type I, type II and type III, are different in terms of spectral properties, as well as effectiveness towards red blood cells. Soluble aggregate types I and III are the active forms of MFAME towards erythrocytes. The medium composition seems to be the main factor determining which type of antibiotic aggregate prevails in solution.
Collapse
Affiliation(s)
- J Szlinder-Richert
- Department of Pharmaceutical Technology and Biochemistry, Technical University of Gdansk, Narutowicza St 11/12, 80-925 Gdansk, Poland.
| | | | | | | | | |
Collapse
|