1
|
Vardar US, Bitter JH, Nikiforidis CV. The mechanism of encapsulating curcumin into oleosomes (Lipid Droplets). Colloids Surf B Biointerfaces 2024; 236:113819. [PMID: 38428208 DOI: 10.1016/j.colsurfb.2024.113819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/15/2024] [Accepted: 02/20/2024] [Indexed: 03/03/2024]
Abstract
Organisms have evolved intracellular micron-sized lipid droplets to carry and protect lipids and hydrophobic minor compounds in the hydrophilic environment of cells. These droplets can be utilized as carriers of hydrophobic therapeutics by taking advantage of their biological functions. Here, we focus on the potential of plant-derived lipid droplets, known as oleosomes, as carriers for hydrophobic therapeutics, such as curcumin. By spectroscopy and confocal microscopy, we demonstrate that the oleosome membrane is permeable to hydrophobic curcumin molecules. Fluorescence recovery after photobleaching shows rapid curcumin diffusion towards oleosomes, with a diffusion time in the range of seconds. Following this, quenching probes and dilatational rheology reveal that part of the loaded curcumin molecules can accumulate at the oleosome interface, and the rest settle in the inner core. Our findings shed light on the loading mechanism of the plant-derived lipid droplets and underscore the significance of molecular localization for understanding the mechanism. This work not only enhances the understanding of the loading process but also shows potential for oleosomes use as lipid carriers.
Collapse
Affiliation(s)
- Umay Sevgi Vardar
- Biobased Chemistry and Technology, Wageningen University and Research, Bornse Weilanden 9, Wageningen 6708 WG, the Netherlands
| | - Johannes H Bitter
- Biobased Chemistry and Technology, Wageningen University and Research, Bornse Weilanden 9, Wageningen 6708 WG, the Netherlands
| | - Constantinos V Nikiforidis
- Biobased Chemistry and Technology, Wageningen University and Research, Bornse Weilanden 9, Wageningen 6708 WG, the Netherlands.
| |
Collapse
|
2
|
Wu Y, Zhu X, Wang X, Lin Z, Reinfelder JR, Li F, Liu T. A New Electron Shuttling Pathway Mediated by Lipophilic Phenoxazine via the Interaction with Periplasmic and Inner Membrane Proteins of Shewanella oneidensis MR-1. Environ Sci Technol 2023; 57:2636-2646. [PMID: 36652548 DOI: 10.1021/acs.est.2c07862] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Although it has been established that electron mediators substantially promote extracellular electron transfer (EET), electron shuttling pathways are not fully understood. Here, a new electron shuttling pathway was found in the EET process by Shewanella oneidensis MR-1 with resazurin, a lipophilic electron mediator. With resazurin, the genes encoding outer-membrane cytochromes (mtrCBA and omcA) were downregulated. Although cytochrome deletion substantially reduced biocurrent generation to 1-12% of that of wild-type (WT) cells, the presence of resazurin restored biocurrent generation to 168 μA·cm-2 (ΔmtrA/omcA/mtrC), nearly equivalent to that of WT cells (194 μA·cm-2), indicating that resazurin-mediated electron transfer was not dependent on the Mtr pathway. Biocurrent generation by resazurin was much lower in ΔcymA and ΔmtrA/omcA/mtrC/fccA/cctA mutants (4 and 6 μA·cm-2) than in WT cells, indicating a key role of FccA, CctA, and CymA in this process. The effectiveness of resazurin in EET of Mtr cytochrome mutants is also supported by cyclic voltammetry, resazurin reduction kinetics, and in situ c-type cytochrome spectroscopy results. The findings demonstrated that low molecular weight, lipophilic electron acceptors, such as phenoxazine and phenazine, may facilitate electron transfer directly from periplasmic and inner membrane proteins, thus providing new insight into the roles of exogenous electron mediators in electron shuttling in natural and engineered biogeochemical systems.
Collapse
Affiliation(s)
- Yundang Wu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Xiao Zhu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xinxin Wang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Zhixin Lin
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - John R Reinfelder
- Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey 08901, United States
| | - Fangbai Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Tongxu Liu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| |
Collapse
|
3
|
Weijs L, Covaci A, Carroll A, Kemper C, Melvin S. Exploring lipid affinities of persistent organic pollutants and MeO-PBDEs in blubber of marine mammals. Chemosphere 2022; 308:136448. [PMID: 36115469 DOI: 10.1016/j.chemosphere.2022.136448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 09/08/2022] [Accepted: 09/11/2022] [Indexed: 06/15/2023]
Abstract
Although lipophilic compounds have been the focus of numerous studies in marine mammals, their association with lipids is widely accepted, but rarely scrutinized. This pilot study aimed to investigate potential relationships between individual lipids from different lipid classes identified through a non-targeted Nuclear Magnetic Resonance (NMR) based lipidomics approach and legacy POPs in the blubber of long-finned pilot whales, sperm whales, common bottlenose dolphins, and Indo-Pacific bottlenose dolphins. Concentrations of selected POPs such as HCB and HCHs in sperm whales from Tasmania were found to differ from those in long-finned pilot whales and common bottlenose dolphins from the same location. Profiles of NMR spectra measured in blubber of sperm whales were also distinctly different compared to the pilot whales and common bottlenose dolphins. Two groups of Indo-Pacific bottlenose dolphins from South Australia that were 20 years apart showed highly comparable profiles of NMR signals despite having higher concentrations of several POP classes in the more recent group. More specific correlations were investigated between selected POPs (n = 12) and all detected NMR signals (n = 63) in all species. Outcomes were species-specific, but difficult to interpret due to the lack of available literature for marine mammals and the small sample sizes per species. Because of the key role of lipids in the bioaccumulation of POPs and in the incidence of diseases, more attention should be given to the identification and characterization of lipid species in future toxicological studies. However, future studies should focus on one marine mammal species to increase sample sizes and limit the number of confounding factors, such as diet, that can influence POP and lipid levels and profiles.
Collapse
Affiliation(s)
- Liesbeth Weijs
- School of Environment and Science, Griffith University, Southport, Queensland, 4215, Australia; Australian Rivers Institute (ARI), Griffith University, Gold Coast Campus, Queensland, 4222, Australia; Coastal and Marine Research Centre, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, Wilrijk, 2610, Belgium
| | - Anthony Carroll
- School of Environment and Science, Griffith University, Southport, Queensland, 4215, Australia; Centre for Planetary Health and Food Security, Griffith University, Southport, Queensland, 4215, Australia
| | - Catherine Kemper
- South Australian Museum, North Terrace, Adelaide, South Australia, 5000, Australia
| | - Steve Melvin
- School of Environment and Science, Griffith University, Southport, Queensland, 4215, Australia; Australian Rivers Institute (ARI), Griffith University, Gold Coast Campus, Queensland, 4222, Australia
| |
Collapse
|
4
|
Likumahua S, de Boer MK, Krock B, Tatipatta WM, Abdul MS, Buma AGJ. Co-occurrence of pectenotoxins and Dinophysis miles in an Indonesian semi-enclosed bay. Mar Pollut Bull 2022; 185:114340. [PMID: 36410193 DOI: 10.1016/j.marpolbul.2022.114340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/29/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
The study aims to unravel the variability of Dinophysis spp. and their alleged toxins in conjunction with environmental drivers in Ambon Bay. Phytoplankton samples, lipophilic toxins and physiochemical water properties were analysed during a 1.5-year period. Three Dinophysis species (D. miles, D. caudata, and D. acuminata) were found in plankton samples, of which D. miles was the most abundant and persistently occurring species. Pectenotoxin-2 (PTX2) and its secoacid (PTX2sa) were detected throughout, and PTX2sa levels strongly correlated with D. miles cell abundance. The toxin showed a positive correlation with temperature, which may suggest that D. miles cells contain rather constant PTX2sa during warmer months. Dissolved nitrate concentrations were found to play a major role in regulating cell abundances and toxin levels. This study adds adequate information regarding marine biotoxins and potentially toxic species for future Harmful Algal Bloom management in Ambon and Indonesia at large.
Collapse
Affiliation(s)
- Sem Likumahua
- Center for Isotope Research-CIO Oceans, Energy and Sustainability Research Institute Groningen, Faculty of Science and Engineering, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands; Centre for Deep Sea Research, The National Research and Innovation Agency (BRIN), Jl. Y. Syaranamual Guru-guru, Poka, 97233 Ambon, Indonesia; Collaborative Research Center for Aquatic Ecosystem of Eastern Indonesia, Pattimura University, Jl. Ir. M. Putuhena, Poka, 97233 Ambon, Indonesia.
| | - M Karin de Boer
- Center for Isotope Research-CIO Oceans, Energy and Sustainability Research Institute Groningen, Faculty of Science and Engineering, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands; Beta Science Shop, Faculty of Science and Engineering, University of Groningen, Nijenborgh 6, 9747AG Groningen, the Netherlands
| | - Bernd Krock
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Willem M Tatipatta
- Centre for Deep Sea Research, The National Research and Innovation Agency (BRIN), Jl. Y. Syaranamual Guru-guru, Poka, 97233 Ambon, Indonesia
| | - Malik S Abdul
- Centre for Deep Sea Research, The National Research and Innovation Agency (BRIN), Jl. Y. Syaranamual Guru-guru, Poka, 97233 Ambon, Indonesia
| | - Anita G J Buma
- Center for Isotope Research-CIO Oceans, Energy and Sustainability Research Institute Groningen, Faculty of Science and Engineering, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands
| |
Collapse
|
5
|
DA Q, Zhang J, Zhang P, Shi Z, Ma H, Jing L. Design, synthesis and anti-hypoxia activity of HPN derivatives containing lipophilic long chains. Zhejiang Da Xue Xue Bao Yi Xue Ban 2022; 51:415-421. [PMID: 37202092 DOI: 10.3724/zdxbyxb-2022-0174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
OBJECTIVE To design and synthesize long-chain substituted 2-[(4'-hydroxyethoxy) phenyl]-4,4,5,5-tetramethyl-2-imidazoline-1-oxyl 3-oxide (HPN) derivatives with enhanced anti-hypoxic activity. METHODS HPN derivatives 1, 3, 5 containing lipophilic long chains were synthesized via the alkylation of HPN with 6-bromohexan-1-ol, ethyl 6-bromohexanoate or 6-bromohexane, respectively using acetonitrile as the solvent and K 2CO 3 as the acid-binding agent at 60 ℃. Derivative 2 was synthesized via hydrolysis reactions of derivative 1 in the NaOH/CH 3OH/H 2O system. Using dichloromethane as the solvent and N, N'-diisopropylcarbodiimide as the dehydrating agent, HPN underwent esterification with hexanoic acid to obtain derivative 4. The structures of derivatives 1-5 were characterized by infrared spectroscopy, electron paramagnetic resonance and high resolution mass spectrometry. The purities of derivatives were detected by high performance liquid chromatography, and the lipid solubilities of derivatives were evaluated by calculating the oil-water partition coefficients (log P). Anti-hypoxia activities of HPN and its long-chain lipophilic derivatives 1-5 were evaluated using normobaric hypoxia test and acute decompression hypoxia test. RESULTS The structures of the derivatives were confirmed by infrared spectroscopy, electron paramagnetic resonance and high resolution mass spectroscopy. The yields of target derivatives were all above 92%, and the purities were all above 96%. The log P values of derivatives 1-5 were 2.78, 2.00, 2.04, 2.88 and 3.10, which were higher than that of HPN (0.97). Derivatives 1-5 significantly prolonged the survival time of mice at the dose of 0.3 mmol/kg in normobaric hypoxic test and reduced the mortality rate of acute decompression hypoxic mice to 60%, 70%, 60%, 70% and 40%, respectively. CONCLUSIONS The synthesis of derivatives 1-5 is convenient, and the yield is high. The synthesized derivatives especially derivative 5 show anti-hypoxic activity similar to or better than HPN at lower doses.
Collapse
Affiliation(s)
- Qingyue DA
- 1. School of Pharmacy, Lanzhou University, Lanzhou 730000, China
- 2. Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Jie Zhang
- 3. Department of pharmacy, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Key Laboratory of the Plateau Medicine, Lanzhou 730050, China
| | - Pengpeng Zhang
- 3. Department of pharmacy, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Key Laboratory of the Plateau Medicine, Lanzhou 730050, China
| | - Zhiqun Shi
- 3. Department of pharmacy, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Key Laboratory of the Plateau Medicine, Lanzhou 730050, China
| | - Huiping Ma
- 3. Department of pharmacy, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Key Laboratory of the Plateau Medicine, Lanzhou 730050, China
| | - Linlin Jing
- 2. Center for Brain Science, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| |
Collapse
|
6
|
Phan K, Kaur K, Wright K, Tran S, Stewart B, Brown M, Vlahovic TC. The Penetrance of Topical Nail Therapy: Limitations and Current Enhancements. Clin Podiatr Med Surg 2021; 38:535-40. [PMID: 34538431 DOI: 10.1016/j.cpm.2021.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The chemical composition and thickness of nails are obstacles for treatments of various nail diseases, such as onychomycosis. Topical medications are currently the preferred method of treatment because of reduced adverse systemic effects. However, penetration of the product from the nail plate into the nail bed continues to be an issue because of factors such as distance required to reach the target area, chemical barriers, and drug inactivation upon keratin binding. Beyond developing novel drugs, some studies have investigated mechanical and chemical methods to optimize drug delivery. The issue of nail diseases is still a challenge and requires multifactorial treatments.
Collapse
|
7
|
Vinod N, Hwang D, Azam SH, Van Swearingen AED, Wayne E, Fussell SC, Sokolsky-Papkov M, Pecot CV, Kabanov AV. Preparation and Characterization of Poly(2-oxazoline) Micelles for the Solubilization and Delivery of Water Insoluble Drugs. Bio Protoc 2021; 11:e3959. [PMID: 33855119 PMCID: PMC8032494 DOI: 10.21769/bioprotoc.3959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 01/14/2021] [Accepted: 01/25/2021] [Indexed: 11/02/2022] Open
Abstract
Many new drug development candidates are highly lipophilic compounds with low water solubility. This constitutes a formidable challenge for the use of such compounds for cancer therapy, where high doses and intravenous injections are needed ( Di et al., 2012 ). Here, we present a poly(2-oxazoline) polymer (POx)-based nanoformulation strategy to solubilize and deliver hydrophobic drugs. POx micelles are prepared by a simple thin-film hydration method. In this method, the drug and polymer are dissolved in a common solvent and allowed to mix, following which the solvent is evaporated using mild heating conditions to form a thin film. The micelles form spontaneously upon hydration with saline. POx nanoformulation of hydrophobic drugs is unique in that it has a high drug loading capacity, which is superior to micelles of conventional surfactants. Moreover, multiple active pharmaceutical ingredients (APIs) can be included within the same POx micelle, thereby enabling the codelivery of binary as well as ternary drug combinations ( Han et al., 2012 ; He et al., 2016 ).
Collapse
Affiliation(s)
- Natasha Vinod
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC, USA
- Joint UNC/NC State Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, USA
| | - Duhyeong Hwang
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC, USA
| | - Salma H. Azam
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Elizabeth Wayne
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC, USA
| | - Sloane Christian Fussell
- Department of Biology, Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Marina Sokolsky-Papkov
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC, USA
| | - Chad V. Pecot
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Hematology & Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alexander V. Kabanov
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC, USA
- Laboratory of Chemical Design of Bionanomaterials, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
| |
Collapse
|
8
|
Irvin S, Clarke MA, Trabert B, Wentzensen N. Systematic review and meta-analysis of studies assessing the relationship between statin use and risk of ovarian cancer. Cancer Causes Control 2020; 31:869-879. [PMID: 32685996 DOI: 10.1007/s10552-020-01327-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/07/2020] [Indexed: 12/24/2022]
Abstract
PURPOSE The link between lipid-stabilizing medications and epithelial ovarian carcinogenesis is incompletely understood. Statins may reduce ovarian cancer risk, but results are inconclusive. METHODS We conducted a systematic review and meta-analysis of studies reporting associations between statin use and ovarian cancer risk in PubMed. Summary risk ratios (RRs) and confidence intervals (CIs) were calculated. Subgroup analyses by cancer histotype, statin class (lipo- or hydrophilic) and duration of statin use were conducted. Use of individual statins in populations was assessed to determine population-specific differences in statin types. RESULTS Nine studies with 435,237 total women were included (1 randomized controlled trial (RCT); 4 prospective; 4 case-control). Statin use was associated with a reduced risk of ovarian cancer (RR 0.87, 95% CI 0.74-1.03) and risk was significantly reduced in populations with low pravastatin use (RR 0.83, 95% CI 0.70-0.99). Risk estimates varied by statin class (3 studies; lipophilic: RR 0.88, 95% CI 0.69-1.12; hydrophilic: RR 1.06, 95% CI 0.72-1.57) and cancer histotype (3 studies; serous: RR 0.95, 95% CI 0.69-1.30; clear cell: RR 1.17, 95% CI 0.74-1.86). Long-term use was associated with a reduced risk of ovarian cancer (RR 0.77, 95% CI 0.54-1.10) that further reduced when pravastatin use was low (RR 0.68, 95% CI 0.46-1.01). Between-study heterogeneity was high overall and in subgroups (I2 > 60%). CONCLUSION Statins may be associated with a reduced risk of ovarian cancer, but the effect likely differs by individual statin, duration of use and cancer histotype. Additional well-powered studies are needed to elucidate important subgroup effects.
Collapse
Affiliation(s)
- Sarah Irvin
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rockville, MD, 20850, USA.
| | - Megan A Clarke
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rockville, MD, 20850, USA
| | - Britton Trabert
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rockville, MD, 20850, USA
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rockville, MD, 20850, USA
| |
Collapse
|
9
|
Moreira AJ, Campos LO, Maldi CP, Dias JA, Paris EC, Giraldi TR, Freschi GPG. Photocatalytic degradation of Prozac® mediated by TiO 2 nanoparticles obtained via three synthesis methods: sonochemical, microwave hydrothermal, and polymeric precursor. Environ Sci Pollut Res Int 2020; 27:27032-27047. [PMID: 32388756 DOI: 10.1007/s11356-020-08798-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/06/2020] [Indexed: 05/20/2023]
Abstract
Three different synthesis methods were applied to obtain TiO2 nanoparticles: microwave-assisted hydrothermal (TiO2-MW), sonochemical (TiO2-US), and polymeric precursor (TiO2-PP). The nanoparticles thus obtained presented 93% (TiO2-MW) and 92% (TiO2-US) anatase phase, and TiO2-PP 93% rutile phase. The TiO2-US sample performed best during the Prozac® photodegradation assays because of its lipophilic surface, attributable to the C-H groups therein. Additionally, adsorption rate and photodegradation were optimized by adjusting Prozac® solution to pH ~ 8. Following Prozac® photodegradation, quantitative monitoring of its by-products (PPMA, MAEB, and TFMP) was done using HPLC. This quantitative approach led us to conclude that semiconductor photoactivity cannot be discussed solely in terms of the main compound. Lastly, it was seen that these by-products compete with each other in the degradation mechanisms and are influenced by different materials. Graphical abstract.
Collapse
Affiliation(s)
- Ailton J Moreira
- Universidade Federal de Alfenas, campus Poços de Caldas, Rod. José Aurélio Vilela, BR 267, Km 533, 11999 -Cidade Universitária,, Poços de Caldas, MG, Brazil.
- Universidade Federal de São Carlos, Rod. Washington Luiz, km 110, cidade Universitária, São Carlos, SP, Brazil.
| | - Lilian O Campos
- Universidade Federal de Alfenas, campus Poços de Caldas, Rod. José Aurélio Vilela, BR 267, Km 533, 11999 -Cidade Universitária,, Poços de Caldas, MG, Brazil
| | - Caroline P Maldi
- Universidade Federal de Alfenas, campus Poços de Caldas, Rod. José Aurélio Vilela, BR 267, Km 533, 11999 -Cidade Universitária,, Poços de Caldas, MG, Brazil
| | - Jeferson A Dias
- Universidade Federal de São Carlos, Rod. Washington Luiz, km 110, cidade Universitária, São Carlos, SP, Brazil
| | - Elaine C Paris
- Embrapa Instrumentação Agropecuária, Rua XV de Novembro, São Carlos, SP, CEP: 13560-970, Brazil
| | - Tania R Giraldi
- Universidade Federal de Alfenas, campus Poços de Caldas, Rod. José Aurélio Vilela, BR 267, Km 533, 11999 -Cidade Universitária,, Poços de Caldas, MG, Brazil
| | - Gian P G Freschi
- Universidade Federal de Alfenas, campus Poços de Caldas, Rod. José Aurélio Vilela, BR 267, Km 533, 11999 -Cidade Universitária,, Poços de Caldas, MG, Brazil
| |
Collapse
|
10
|
Chinna Gownder T, Venkatachalam S. Inhibition of membrane bound lipophilic plant (Borassus flabelifer L.) peroxidase by phenolic compounds. Int J Biol Macromol 2019; 122:844-7. [PMID: 30342122 DOI: 10.1016/j.ijbiomac.2018.09.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/18/2018] [Accepted: 09/23/2018] [Indexed: 11/24/2022]
Abstract
Borassus flabelifer peroxidase was ionically interacting with stone parts of its fruit. The apparently homogeneous membrane bound peroxidase was reversibly inhibited by various aromatic alcohols. Dixon plot clearly showed mixed type of inhibition. Ki values of peroxidase-inhibitor complexes were determined. The homogenous peroxidase had non-covalently interacting triglycerides or triglyceride esterified phytosterols. This Peroxidase was interacting with acid hydrolysable low density lipoprotein but not with high density lipoprotein. This may be one of the reasons for its stability and catalysis in organic solvents. Further studies may prove it as lipophilic enzyme. These waste stone parts may be utilized in extracting phytosterols and fatty acids which has medicinal value.
Collapse
|
11
|
Sokalska A, Hawkins AB, Yamaguchi T, Duleba AJ. Lipophilic statins inhibit growth and reduce invasiveness of human endometrial stromal cells. J Assist Reprod Genet 2019; 36:535-41. [PMID: 30554393 DOI: 10.1007/s10815-018-1352-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 10/19/2018] [Indexed: 12/26/2022] Open
Abstract
PURPOSE To compare effects of lipid-soluble statins (simvastatin, lovastatin, atorvastatin) and water-soluble statin (pravastatin) on growth and invasiveness of human endometrial stromal (HES) cells. METHODS Endometrial biopsies were collected during the proliferative phase from five volunteers. HES cells were isolated and cultured in the absence or in the presence of simvastatin, lovastatin, atorvastatin, and pravastatin. Effects of statins on DNA synthesis, cell viability, activity of caspases 3/7 and invasiveness were evaluated. RESULTS The proliferation of HES cells was significantly decreased by simvastatin (by 47-89%), lovastatin (by 46-78%), and atorvastatin (by 21-48%) in a concentration-dependent manner. Activity of executioner caspases 3/7 was significantly increased by simvastatin (by 10-25%), lovastatin (by 19%) and atorvastatin (by 7-10%) in a concentration-dependent manner. The greatest effects were observed in response to simvastatin. Accounting for the effects of statins on cell number, the invasiveness of HES cells was significantly decreased in cells treated with simvastatin (by 49%), lovastatin (by 54%), and atorvastatin (by 53%). Pravastatin had little or no effects on any of the tested endpoints. CONCLUSIONS Present findings demonstrate that only lipid-soluble among tested statins were effective in inhibition of growth and invasiveness of HES cells. These findings may have clinical relevance in treatment of endometriosis.
Collapse
|
12
|
Knudsen GA, Hughes MF, Birnbaum LS. Dermal disposition of Tetrabromobisphenol A Bis(2,3-dibromopropyl) ether (TBBPA-BDBPE) using rat and human skin. Toxicol Lett 2018; 301:108-113. [PMID: 30481582 DOI: 10.1016/j.toxlet.2018.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/14/2018] [Accepted: 11/22/2018] [Indexed: 12/20/2022]
Abstract
Tetrabromobisphenol A Bis(2,3-dibromopropyl) ether (TBBPA-BDBPE) is a high production volume brominated flame retardant (BFR) used in consumer products, resulting in ubiquitous human exposure. Although the major route of exposure for this chemical is believed to be via ingestion, dermal contact is likely via contaminated dust. Independent trials of a single dose of 100 nmol/cm2 (∼1 μCi [14C]/cm2) of [14C]-radiolabeled TBBPA-BDBPE was applied to whole rat skin (in vivo) or split-thickness human and rat skin (ex vivo) to estimate in vivo human percutaneous uptake. [14C]-radioactivity was quantified to determine dermal absorption (dose retained in dosed skin) and penetrance (dose recovered in receptor fluid [ex vivo] or tissues/excreta [in vivo]) over 24 h. In vivo absorption and penetration for rat skin was 26% and 1%, with a maximum flux of 44 ± 9 pmol/cm2/h. In ex vivo rat skin, absorption and penetration and absorption values were 23% and 0.3% (flux = 26 ± 8 pmol/cm2/h). In ex vivo human skin, 53% was absorbed and penetration was 0.2% with a maximal flux of 16 ± 12 pmol/cm2/h. Computed maximal flux for in vivo human skin was 21 ± 9 pmol/cm2/h with expected total absorption of ∼80% and a penetration of <1%. HPLC-radiometric analyses of samples showed that TBBPA-BDBPE was not metabolized in ex vivo or in vivo studies. These studies indicate that TBBPA-BDBPE is likely to be dermally bioavailable even after washing and dermal contact with this chemical should be considered an important route of exposure.
Collapse
Affiliation(s)
- Gabriel A Knudsen
- NCI Laboratory of Toxicology and Toxicokinetics, 111 T W Alexander Dr., Research Triangle Park, NC, 27709 USA.
| | - Michael F Hughes
- Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Linda S Birnbaum
- NCI Laboratory of Toxicology and Toxicokinetics, 111 T W Alexander Dr., Research Triangle Park, NC, 27709 USA
| |
Collapse
|
13
|
Abstract
A green, fast, and efficient method for synthesizing lipophilic epigallocatechin gallate (EGCG) derivatives was set up for the first time. EGCG was lipophilized by esterification in order to promote its application in lipid products and to possibly enhance its bioactivity. A high conversion of EGCG was achieved. Three monoesters of the EGCG derivatives were confirmed by high performance liquid chromatography-mass spectrometry, and the predominant one was identified as 4'-O-palmitoyl EGCG by nuclear magnetic resonance. The EGCG derivatives exhibited good radical scavenging capacities. In lard the solubility of EGCG derivatives was enhanced 470 times compared to EGCG, and they exhibited excellent antioxidative activity in the oil. These results indicate that the palmitoylated EGCG derivatives may be used as potent antioxidants in lipophilic medium, such as edible oils and fatty foods. In addition, this method can be applied to commercial application, producing antioxidants to substitute for synthetic ones like tert-butylhydroquinone.
Collapse
Affiliation(s)
- Bingbing Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Weidong Yan
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
| |
Collapse
|
14
|
Esua OJ, Chin NL, Yusof YA, Sukor R. Effects of simultaneous UV-C radiation and ultrasonic energy postharvest treatment on bioactive compounds and antioxidant activity of tomatoes during storage. Food Chem 2018; 270:113-122. [PMID: 30174024 DOI: 10.1016/j.foodchem.2018.07.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 10/28/2022]
Abstract
The effects of a novel technology utilizing a simultaneous combination of Ultraviolet-C radiation and ultrasound energy postharvest treatment on tomato bioactive compounds during 28 days' storage period was investigated by varying Ultraviolet-C radiation intensities of 639.37 or 897.16 µW/cm2 at a constant ultrasound intensity of 13.87 W/L from a 40 kHz-1 kW transducer. A minimal treatment time of 240 s at Ultraviolet-C dosage of 2.15 kJ/m2 was observed to provoke a considerable increase in bioactive compounds content, proportionated to treatment time. Although treatment led to temperature increase in the system reaching 39.33 °C due to heat generation by ultrasonic cavitation, the extractability and biosynthesis of phytochemicals were enhanced resulting in 90%, 30%, 60%, 20%, and 36% increases in lycopene, total phenols, vitamin C, hydrophilic and lipophilic antioxidant activities respectively. Results present the potential use of the combined non-thermal technologies as post-harvest treatment to improve bioactive compounds and antioxidant activity during storage.
Collapse
Affiliation(s)
- Okon Johnson Esua
- Department of Process and Food Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; Department of Agricultural and Food Engineering, University of Uyo, Uyo, Akwa Ibom 520101, Nigeria.
| | - Nyuk Ling Chin
- Department of Process and Food Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
| | - Yus Aniza Yusof
- Department of Process and Food Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
| | - Rashidah Sukor
- Department of Food Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
| |
Collapse
|
15
|
Liu B, Yi Z, Guan X, Zeng YX, Ma F. The relationship between statins and breast cancer prognosis varies by statin type and exposure time: a meta-analysis. Breast Cancer Res Treat 2017; 164:1-11. [PMID: 28432513 DOI: 10.1007/s10549-017-4246-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 04/12/2017] [Indexed: 12/13/2022]
Abstract
PURPOSE Breast cancer is the most common cancer in females and the leading cause of death worldwide. The effects of statins on breast cancer prognosis have long been controversial; thus, it is important to investigate the relationship between statin type, exposure time, and breast cancer prognosis. This study sought to explore the effect of statins, as well as the different effects of statin solubility and variable follow-up times, on breast cancer prognosis. METHODS We searched the MEDLINE (via PubMed), EMBASE (via OvidSP), Cochrane Library, and ISI Web of Knowledge databases using combinations of the terms "breast neoplasms[MeSH]," "statins" or "lipid-lowering drug," "prognosis" or "survival," or "mortality" or "outcome" with no limit on the publication date. We searched the databases between inception and October 15, 2016. Reference lists of the included studies and relevant reviews were also manually screened. The initial search identified 71 publications, and 7 of these studies, which included a total of 197,048 women, met the selection criteria. Two authors independently screened each study for inclusion and extracted the data. The data were analyzed using Stata/SE 11.0. RESULTS Overall statin use was associated with lower cancer-specific mortality and all-cause mortality, although the benefit appeared to be constrained by statin type and follow-up time. Lipophilic statins were associated with decreased breast cancer-specific and all-cause mortality; however, hydrophilic statins were weakly protective against only all-cause mortality and not breast cancer-specific mortality. Of note, one group with more than 4 years of follow-up did not show a significant correlation between statin use and cancer-specific mortality or all-cause mortality, whereas groups with less than 4 years of follow-up still showed the protective effect of statins against cancer-specific mortality and all-cause mortality. CONCLUSIONS Although statins can reduce breast cancer patient mortality, the benefit appears to be constrained by statin type and follow-up time. Lipophilic statins showed a strong protective function in breast cancer patients, whereas hydrophilic statins only slightly improved all-cause mortality. Finally, the protective effect of statins could only be observed in groups with less than 4 years of follow-up. These findings are meaningful in clinical practice, although some conclusions contradict conventional wisdom and will thus require further exploration.
Collapse
Affiliation(s)
- Binliang Liu
- Department of Medical Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Zongbi Yi
- Department of Medical Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Xiuwen Guan
- Department of Medical Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Yi-Xin Zeng
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Beijing, 100730, China.
- Beijing Hospital, Beijing, 100730, China.
| | - Fei Ma
- Department of Medical Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| |
Collapse
|
16
|
Jones JG, White KAJ, Delgado-Charro MB. A mechanistic approach to modelling the formation of a drug reservoir in the skin. Math Biosci 2016; 281:36-45. [PMID: 27592115 DOI: 10.1016/j.mbs.2016.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 06/12/2016] [Accepted: 08/24/2016] [Indexed: 11/26/2022]
Abstract
It has been shown that prolonged systemic presence of a drug can cause a build-up of that drug in the skin. This drug 'reservoir', if properly understood, could provide useful information about recent drug-taking history of the patient. We create a pair of coupled mathematical models which combine to explore the potential for a drug reservoir to establish based on the kinetic properties of the drug. The first compartmental model is used to characterise time-dependent drug concentrations in plasma and tissue following a customisable drug regimen. Outputs from this model provide boundary conditions for the second, spatio-temporal model of drug build-up in the skin. We focus on drugs that are highly bound as this will restrict their potential to move freely into the skin but which are lipophilic so that, in the unbound form, they would demonstrate an affinity to the outer layers of the skin. Buprenorphine, a drug used to treat opiate addiction, is one example of a drug satisfying these properties. In the discussion we highlight how our study might be used to inform future experimental design and data collection to provide relevant parameter estimates for reservoir formation and its potential to contribute to enhanced drug monitoring techniques.
Collapse
Affiliation(s)
- J G Jones
- Department of Mathematical Sciences, University of Bath, Bath BA2 7AY, UK; Department of Pharmacy and Pharmacology, University of Bath, Bath BA2 7AY, UK.
| | - K A J White
- Department of Mathematical Sciences, University of Bath, Bath BA2 7AY, UK.
| | - M B Delgado-Charro
- Department of Pharmacy and Pharmacology, University of Bath, Bath BA2 7AY, UK.
| |
Collapse
|
17
|
Wang L, Asimakopoulos AG, Kannan K. Accumulation of 19 environmental phenolic and xenobiotic heterocyclic aromatic compounds in human adipose tissue. Environ Int 2015; 78:45-50. [PMID: 25749637 DOI: 10.1016/j.envint.2015.02.015] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/16/2015] [Accepted: 02/27/2015] [Indexed: 05/21/2023]
Abstract
The extensive use of environmental phenols (e.g., bisphenol A) and heterocyclic aromatic compounds (e.g., benzothiazole) in consumer products as well as widespread exposure of humans to these compounds have been well documented. Biomonitoring studies have used urinary measurements to assess exposures, based on the assumption that these chemicals are metabolized and eliminated in urine. Despite the fact that some of these chemicals are moderately lipophilic, the extent of their accumulation in adipose fat tissues has not been convincingly demonstrated. In this study, human adipose fat samples (N=20) collected from New York City, USA, were analyzed for the presence of environmental phenols, including bisphenol A (BPA), benzophenone-3 (BP-3), triclosan (TCS), and parabens, as well as heterocyclic aromatic compounds, including benzotriazole (BTR), benzothiazole (BTH), and their derivatives. BPA and TCS were frequently detected in adipose tissues at concentrations (geometric mean [GM]: 3.95ng/g wet wt for BPA and 7.21ng/g wet wt for TCS) similar to or below the values reported for human urine. High concentrations of BP-3 were found in human adipose tissues (GM: 43.4; maximum: 4940ng/g wet wt) and a positive correlation between BP-3 concentrations and donor's age was observed. The metabolite of parabens, p-hydroxybenzoic acid (p-HB), also was found at elevated levels (GM: 4160; max.: 17,400ng/g wet wt) and a positive correlation between donor's age and sum concentration of parabens and p-HB were found. The GM concentrations of BTR and BTH in human adipose tissues were below 1ng/g, although the methylated forms of BTR (i.e., TTR and XTR) and the hydrated form of BTH (i.e., 2-OH-BTH) were frequently detected in adipose samples, indicating widespread exposure to these compounds. Our results suggest that adipose tissue is an important repository for BP-3 and parabens, including p-HB, in the human body.
Collapse
Affiliation(s)
- Lei Wang
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, United States; Tianjin Key Laboratory of Environmental Remediation and Pollution Control / Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Alexandros G Asimakopoulos
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, United States
| | - Kurunthachalam Kannan
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, United States.
| |
Collapse
|
18
|
Mata-Espinosa D, Molina-Salinas GM, Barrios-Payán J, Navarrete-Vázquez G, Marquina B, Ramos-Espinosa O, Bini EI, Baeza I, Hernández-Pando R. Therapeutic efficacy of liposomes containing 4-(5-pentadecyl-1,3,4-oxadiazol-2-yl)pyridine in a murine model of progressive pulmonary tuberculosis. Pulm Pharmacol Ther 2015; 32:7-14. [PMID: 25843004 DOI: 10.1016/j.pupt.2015.03.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 01/09/2023]
Abstract
BACKGROUND AND OBJECTIVES Tuberculosis (TB) is one of the deadliest infectious diseases and comprises a global public health concern because co-infection with Human immunodeficiency virus (HIV) and, in particular, the continuous isolation of new Multidrug-resistant strains (MDR), rendering the discovery of novel anti-TB agents a strategic priority. One of the most effective first-line mycobactericidal drugs is Isoniazid (INH). Previously, we reported in vitro anti-mycobacterial activity against sensitive and MDR Mycobacterium tuberculosis strains of a new oxadiazole obtained from the hybridization of INH and palmitic acid. The present study evaluated the therapeutic potential of liposomes including Phosphatidylcholine (PC) and L-α Phosphatidic acid (PA) or PC and Cholesterol (Chol) containing 4-(5-pentadecyl-1,3,4-oxadiazol-2-yl)pyridine in BALB/c male mice infected by intratracheal (i.t.) route with drug-sensitive or MDR M. tuberculosis. METHODS The lipophilic 4-(5-pentadecyl-1,3,4-oxadiazol-2-yl)pyridine was obtained to mix INH and palmitoyl chloride. The in vivo anti-TB effect of this oxadiazole derivative contained in two different liposomes was tested in BALB/c mice infected with a sensitive strain of M. tuberculosis, initiating treatment 2 months post-infection, by i.t. route, of 50 μg of oxadiazole derivative for 1 month. In a second stage, mice were infected with an MDR (resistant to first-line drugs) and treated with 150 μg of an oxadiazole derivative carried by PC + Chol liposomes for 2 months. The effect of the oxadiazole derivative in vivo was determined by the quantification of lung bacilli loads and histopathology. RESULTS In comparison with control animals, drug-sensitive, strain-infected mice treated for 1 month with 50 μg of this oxadiazole derivative contained in the liposomes of PC + Chol showed a significant, 80% decrease of live bacilli in lungs, which correlated with the morphometric observation, and the group of MDR clinical isolate-infected mice treated with 150 μg of the oxadiazole derivative contained in the same type of liposome showed significantly lower lung bacillary loads than control mice, producing 90% of bacilli burden reduction after 2 months of treatment. CONCLUSION These results confirm and extend the reported highly efficient anti-mycobacterial activity of this lipophilic oxidazole derivative when it is carried by liposomes in mice suffering from late progressive pulmonary TB induced by drug-sensitive, and most prominently by, MDR strains.
Collapse
Affiliation(s)
- Dulce Mata-Espinosa
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| | - Gloria María Molina-Salinas
- Unidad de Investigación Médica Yucatán, Unidad Médica de Alta Especialidad (UMAE), Centro Médico Nacional Lic. Ignacio García Téllez, Instituto Mexicano del Seguro Social (IMSS), Calle 41 No. 439, x 32 y 34, Col. Industrial, 97150 Mérida, Yucatán, Mexico.
| | - Jorge Barrios-Payán
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| | - Gabriel Navarrete-Vázquez
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos (UAEM), Av. Universidad No. 1001, Col. Chamilpa, 62209 Cuernavaca, Morelos, Mexico.
| | - Brenda Marquina
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| | - Octavio Ramos-Espinosa
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| | - Estela Isabel Bini
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| | - Isabel Baeza
- Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (INP), Prolongación de Carpio y Plan de Ayala S/N, Col. Santo Tomás, Delegación Miguel Hidalgo, 11349 México, D.F., Mexico.
| | - Rogelio Hernández-Pando
- Sección de Patología Experimental, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Col. Vasco de Quiroga No. 15, Delegación Tlalpan, 14080 México, D.F., Mexico.
| |
Collapse
|
19
|
Karimkhani C, Amir M, Dellavalle RP, Ipaktchi K. Current concepts for oil decontamination of crush injuries: a review. Patient Saf Surg 2014; 8:22. [PMID: 24855490 PMCID: PMC4030045 DOI: 10.1186/1754-9493-8-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 05/08/2014] [Indexed: 11/28/2022] Open
Abstract
This anecdotal, non-systematic review serves to explore the principles and methods of effective oil decontamination from cutaneous wounds, particularly crush injuries. The current expansion of the petroleum industry is necessary to meet increasing world demands for oil. Most stages of oil refining and applications involve significant injury risks, particularly for crush injuries that become contaminated with petroleum compounds. A literature review regarding a standard of care for effective cutaneous oil decontamination is lacking. Based on case reports, animal models, and in vitro studies identified in our expert opinion review, standard water and soap cleansing may not be an appropriate approach. Instead, the principle of ‘like dissolves like’ guides the use of lipophilic, petroleum-derived solvents to attract and subsequently dissolve the petroleum contaminant from the skin injury. Limitations include paucity of and dated literature sources regarding the topic as well as no models specifically addressing crush injuries. Our literature review found that oil decontamination of cutaneous injuries may be best accomplished with oil-based cleansers. Certainly, this topic has significant importance for the potentially carcinogenic petroleum compounds that pervade virtually every aspect of modern human life.
Collapse
Affiliation(s)
- Chante Karimkhani
- Columbia University College of Physicians and Surgeons, 630 W. 168th Street, New York, NY 10032, USA
| | - Mahsa Amir
- Department of Dermatology, University of Colorado School of Medicine, Anschutz Campus, Aurora, CO 80045, USA
| | - Robert P Dellavalle
- Department of Dermatology, University of Colorado School of Medicine, Anschutz Campus, Aurora, CO 80045, USA ; Dermatology Service, Department of Veterans Affairs Medical Center, 1055 Clermont Street, Box 165, Denver, CO, USA ; Department of Epidemiology, Colorado School of Public Health, Aurora, CO 80045, USA
| | - Kyros Ipaktchi
- Department of Orthopaedic Surgery, Denver Health Medical Center, 777 Bannock Street, Denver, CO 80204, USA
| |
Collapse
|
20
|
Huttunen KM, Leppänen J, Laine K, Vepsäläinen J, Rautio J. Convenient microwave-assisted synthesis of lipophilic sulfenamide prodrugs of metformin. Eur J Pharm Sci 2013; 49:624-8. [PMID: 23732628 DOI: 10.1016/j.ejps.2013.05.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Revised: 05/21/2013] [Accepted: 05/26/2013] [Indexed: 10/26/2022]
Abstract
A convenient microwave-assisted synthesis of lipophilic sulfenamide prodrugs of antidiabetic agent, metformin, is reported in this study. These acyclic prodrugs were synthesized directly from selected disulfides with basic metformin and silver nitrate by a one-pot reaction under microwave irradiation. The prepared prodrugs had significantly increased lipophilicity, which resulted in excellent permeability of the octylthio prodrug of metformin across a Caco-2 cell monolayer. According to our preliminary in vivo studies, the octylthio prodrug was also absorbed mostly intact after oral administration in rats. In conclusion, this study shows that these types of more lipophilic sulfenamide prodrugs can be promising candidates to improve permeability and passive absorption of highly water-soluble metformin.
Collapse
Affiliation(s)
- Kristiina M Huttunen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, PO Box 1627, FI-70211 Kuopio, Finland.
| | | | | | | | | |
Collapse
|
21
|
Zhong Y, Ma CM, Shahidi F. Antioxidant and antiviral activities of lipophilic epigallocatechin gallate (EGCG) derivatives. J Funct Foods 2011; 4:87-93. [PMID: 32288792 PMCID: PMC7105014 DOI: 10.1016/j.jff.2011.08.003] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 05/11/2011] [Accepted: 08/10/2011] [Indexed: 01/24/2023] Open
Abstract
The water soluble green tea polyphenol epigallocatechin gallate (EGCG) was lipophilised by esterification with different fatty acids for expanded applications. Four lipophilic ester derivatives of EGCG, namely EGCG-O-tetrastearate, EGCG-O-tetraeicosapentaenoate, EGCG-O-tetradocosahexaenoate, and EGCG-O-octabutyrate, were prepared and evaluated for their antioxidant and antiviral activities in vitro. Incorporation of fatty acids, especially the long chain polyunsaturated fatty acids (PUFA), into EGCG resulted in increased peroxyl radical scavenging activity, as measured by ORAC (oxygen radical absorbance capacity) assay, and metal chelation capacity. However, the esters exhibited decreased reducing power. Antiviral activities of EGCG derivatives were remarkably higher than the parent EGCG molecule, which showed relatively weak effects. The EGCG–PUFA esters were 1700-fold more effective in inhibiting hepatitis C virus (HCV) protease than the positive control embelin. The derivatives also acted as α-glucosidase inhibitors, suggesting their potential in anti-HIV (human immunodeficiency virus) treatment. The results suggest that ester derivatives of EGCG with improved bioactivities may serve as excellent functional food ingredients and natural health products. Moreover, the omega-3 PUFA in the derivatives may also render additional or synergistic health benefits.
Collapse
Affiliation(s)
- Ying Zhong
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Chao-Mei Ma
- College of Life Sciences, Inner Mongolia University, Huhhot, China
| | - Fereidoon Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL, Canada
| |
Collapse
|