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Wang Y, Shen J, Meng F, Lu Z, Lv F, Zhou L, Zhao H. Effects of monolauroyl-galactosylglycerol on membrane fatty acids and properties of Bacillus cereus. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12567-4. [PMID: 37204449 DOI: 10.1007/s00253-023-12567-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/28/2023] [Accepted: 04/25/2023] [Indexed: 05/20/2023]
Abstract
The purpose of this study was to provide new ideas for the antibacterial mechanism of monolauroyl-galactosylglycerol (MLGG) from the perspective of cell membranes. The changes in cell membrane properties of Bacillus cereus (B. cereus) CMCC 66,301 exposed to different concentrations (1 × MIC (minimum inhibitory concentration), 2 × MIC, 1 × MBC (minimum bacterial concentration)) of MLGG were evaluated. It was found that the lag phase of B. cereus cells was prolonged at low concentration MLGG (1 × MIC and 2 × MIC), while about 2 log CFU/mL reduction in B. cereus populations were observed when exposed to high concentration MLGG (1 × MBC). MLGG treated B. cereus displayed obvious membrane depolarization, while membrane permeability had no change using PI (propidium iodide) staining. Significant increase in the membrane fluidity in response to MLGG exposure occurred, which was consistent with the modification of membrane fatty acids compositions, where the relative content of straight-chain fatty acids (SCFAs) and unsaturated fatty acids (UFAs) increased, while branched-chain fatty acids (BCFAs) decreased significantly. The decreased transition Tm value and cell surface hydrophobicity was also observed. Additionally, effect of MLGG on bacterial membrane compositions were explored at the submolecular level by infrared spectroscopy. Resistance tests of B. cereus to MLGG had demonstrated the advantages of MLGG as a bacteriostatic agent. Collectively, these studies indicate that modifying the fatty acid composition and properties of cellular membranes through MLGG exposure is crucial for inhibiting bacteria growth, providing new insights into the antimicrobial mechanisms of MLGG. KEY POINTS: • Monolauroyl-galactosylglycerol inserted into B. cereus lipid bilayer membrane • Monolauroyl-galactosylglycerol treatment caused B. cereus membrane depolarization • Monolauroyl-galactosylglycerol resulted in B. cereus membrane fatty acids alteration.
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Affiliation(s)
- Ying Wang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Juan Shen
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Fanqiang Meng
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Fengxia Lv
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Libang Zhou
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Haizhen Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China.
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Li J, Kalyanram P, Rozati S, Monje-Galvan V, Gupta A. Interaction of Cyanine-D112 with Binary Lipid Mixtures: Molecular Dynamics Simulation and Differential Scanning Calorimetry Study. ACS OMEGA 2022; 7:9765-9774. [PMID: 35350357 PMCID: PMC8945139 DOI: 10.1021/acsomega.1c07378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
This comprehensive molecular dynamics (MD) simulation and experimental study investigates the lipid bilayer interactions of dye D112 for potential photodynamic therapy (PDT) applications. PDT involves formation of a reactive oxidant species in the presence of a light sensitive molecule and light, interrupting cellular functions. D112 was developed as a photographic emulsifier, and we hypothesized that its combined cationic and lipophilic nature can render a superior photosensitizing property-crucial in various light therapies. The focus of this study is to elucidate the binding and insertion mechanisms of D112 with mixed lipid bilayers of anionic dipalmitoyl-phosphatidylserine (DPPS) and zwitterionic dipalmitoyl-phosphatidylcholine (DPPC) lipids to resemble cancer cell membranes. Our studies confirm initial electrostatic binding between the positively charged moieties of D112 and negatively charged lipid headgroups. Additionally, MD simulations combined with differential scanning calorimetry (DSC) studies confirm that D112-lipid interactions are governed by enthalpy-driven nonclassical hydrophobic effects in the membrane interior. It was further noted that despite the electrostatic preference of D112 toward the anionic lipids, D112 molecules colocalized on DPPC-rich domains after insertion. Atomistic level MD studies point toward two possible insertion mechanisms for D112: harpoon and flip. Further insights from the simulation showcase the interactions of low and high aggregates of D112 with the bilayer as the concentration of D112 increases in solution. The size of aggregates modulates the orientation and degree of insertion, providing important information for future studies on membrane permeation mechanisms.
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Affiliation(s)
- Jinhui Li
- Department
of Chemical and Biological Engineering, University at Buffalo, Buffalo, New York 14260, United States
| | - Poornima Kalyanram
- Department
of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Seyedalireza Rozati
- Department
of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Viviana Monje-Galvan
- Department
of Chemical and Biological Engineering, University at Buffalo, Buffalo, New York 14260, United States
| | - Anju Gupta
- Department
of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
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Kalyanram P, Puri A, Gupta A. Thermotropic effects of PEGylated lipids on the stability of HPPH-encapsulated lipid nanoparticles (LNP). JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 2021; 147:6337-6348. [PMID: 34220293 PMCID: PMC8235917 DOI: 10.1007/s10973-021-10929-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/30/2021] [Indexed: 06/13/2023]
Abstract
In this work, we demonstrate the enhanced thermal and steric stability of lipid-based formulations in the presence of encapsulated HPPH that have demonstrated potential cancer applications in previously presented in vivo studies. Differential scanning calorimeter (DSC) was used to study the phase transitions, and domain formations, and to qualify the thermodynamic properties associated with change in lipid bilayer behavior due to the presence of PEGylated at varying concentrations and sizes, and the encapsulated HPPH molecules. Thermal instability was quantified by dramatic changes in calculated enthalpy, and the shape of the melting peak or calculated half width of melting peak. This systematic study focused on understanding the effects of varying molecular mass and concentrations of PEG polymers in the photopolymerizable lipid DC8, 9PC lipid bilayer matrix for four weeks at room temperature of 25 °C. The major findings include increased thermal stability of the lipid bilayer due to the presence of PEG-2 K and the HPPH that resulted from the van der Waals forces between various molecular species, and the change in bilayer curvature confirmed via mathematical correlations. It is demonstrated that the encapsulation of therapeutics in lipid formulations can alter their overall thermal behavior, and therefore, it is imperative to consider calorimetric effects while designing lipid-based vaccines. The presented research methodologies and findings presented can predict the stability of lipid-based vaccines that are under development such as COVID-19 during their storage, transport, and distribution.
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Affiliation(s)
- Poornima Kalyanram
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606 USA
| | - Anu Puri
- RNA Biology Laboratory, National Cancer Institute At Frederick, Frederick, MD 21702 USA
| | - Anju Gupta
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606 USA
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Rahim MA, Jan N, Khan S, Shah H, Madni A, Khan A, Jabar A, Khan S, Elhissi A, Hussain Z, Aziz HC, Sohail M, Khan M, Thu HE. Recent Advancements in Stimuli Responsive Drug Delivery Platforms for Active and Passive Cancer Targeting. Cancers (Basel) 2021; 13:670. [PMID: 33562376 PMCID: PMC7914759 DOI: 10.3390/cancers13040670] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/13/2022] Open
Abstract
The tumor-specific targeting of chemotherapeutic agents for specific necrosis of cancer cells without affecting the normal cells poses a great challenge for researchers and scientists. Though extensive research has been carried out to investigate chemotherapy-based targeted drug delivery, the identification of the most promising strategy capable of bypassing non-specific cytotoxicity is still a major concern. Recent advancements in the arena of onco-targeted therapies have enabled safe and effective tumor-specific localization through stimuli-responsive drug delivery systems. Owing to their promising characteristic features, stimuli-responsive drug delivery platforms have revolutionized the chemotherapy-based treatments with added benefits of enhanced bioavailability and selective cytotoxicity of cancer cells compared to the conventional modalities. The insensitivity of stimuli-responsive drug delivery platforms when exposed to normal cells prevents the release of cytotoxic drugs into the normal cells and therefore alleviates the off-target events associated with chemotherapy. Contrastingly, they showed amplified sensitivity and triggered release of chemotherapeutic payload when internalized into the tumor microenvironment causing maximum cytotoxic responses and the induction of cancer cell necrosis. This review focuses on the physical stimuli-responsive drug delivery systems and chemical stimuli-responsive drug delivery systems for triggered cancer chemotherapy through active and/or passive targeting. Moreover, the review also provided a brief insight into the molecular dynamic simulations associated with stimuli-based tumor targeting.
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Affiliation(s)
- Muhammad Abdur Rahim
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Nasrullah Jan
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Safiullah Khan
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Hassan Shah
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Asadullah Madni
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Arshad Khan
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Punjab, Pakistan; (M.A.R.); (N.J.); (S.K.); (H.S.); (A.K.)
| | - Abdul Jabar
- College of Pharmacy, University of Sargodha, Sargodha 40100, Punjab, Pakistan;
| | - Shahzeb Khan
- Department of Pharmacy, University of Malakand, Chakdara, Dir Lower 18800, Khyber Pakhtunkhwa, Pakistan;
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001, Westville 3631, Durban 4000, South Africa
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
| | - Abdelbary Elhissi
- College of Pharmacy, QU Health and Office of VP for Research and Graduate Studies, Qatar University, P.O. Box 2713, Doha, Qatar;
| | - Zahid Hussain
- Department of Pharmaceutics & Pharmaceutical Technology, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates;
- Research Institute for Medical and Health Sciences (SIMHR), University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Heather C Aziz
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA;
| | - Muhammad Sohail
- Department of Pharmacy, COMSATS University Abbottabad Campus, Abbottabad 45550, Khyber Pakhtunkhwa, Pakistan;
| | - Mirazam Khan
- Department of Pharmacy, University of Malakand, Chakdara, Dir Lower 18800, Khyber Pakhtunkhwa, Pakistan;
| | - Hnin Ei Thu
- Research and Innovation Department, Lincolon University College, Petaling Jaya 47301, Selangor, Malaysia;
- Innoscience Research Institute, Skypark, Subang Jaya 47650, Selangor, Malaysia
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