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Grizzo A, Dos Santos DM, da Costa VPV, Lopes RG, Inada NM, Correa DS, Campana-Filho SP. Multifunctional bilayer membranes composed of poly(lactic acid), beta-chitin whiskers and silver nanoparticles for wound dressing applications. Int J Biol Macromol 2023; 251:126314. [PMID: 37586628 DOI: 10.1016/j.ijbiomac.2023.126314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/18/2023]
Abstract
Nanomaterial-based wound dressings have been extensively studied for the treatment of both minor and life-threatening tissue injuries. These wound dressings must possess several crucial characteristics, such as tissue compatibility, non-toxicity, appropriate biodegradability to facilitate wound healing, effective antibacterial activity to prevent infection, and adequate physical and mechanical strength to withstand repetitive dynamic forces that could potentially disrupt the healing process. Nevertheless, the development of nanostructured wound dressings that incorporate various functional micro- and nanomaterials in distinct architectures, each serving specific purposes, presents significant challenges. In this study, we successfully developed a novel multifunctional wound dressing based on poly(lactic acid) (PLA) fibrous membranes produced by solution-blow spinning (SBS) and electrospinning. The PLA-based membranes underwent surface modifications aimed at tailoring their properties for utilization as effective wound dressing platforms. Initially, beta-chitin whiskers were deposited onto the membrane surface through filtration, imparting hydrophilic character. Afterward, silver nanoparticles (AgNPs) were incorporated onto the beta-chitin layer using a spray deposition method, resulting in platforms with antimicrobial properties against both Staphylococcus aureus and Escherichia coli. Cytotoxicity studies demonstrated the biocompatibility of the membranes with the neonatal human dermal fibroblast (HDFn) cell line. Moreover, bilayer membranes exhibited a high surface area and porosity (> 80%), remarkable stability in aqueous media, and favorable mechanical properties, making them promising candidates for application as multifunctional wound dressings.
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Affiliation(s)
- Amanda Grizzo
- Sao Carlos Institute of Chemistry/University of Sao Paulo, 13566-590 Sao Carlos, Sao Paulo, Brazil; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970, Sao Carlos, Sao Paulo, Brazil
| | - Danilo M Dos Santos
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970, Sao Carlos, Sao Paulo, Brazil
| | - Víttor P V da Costa
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970, Sao Carlos, Sao Paulo, Brazil; PPGBiotec, Center for Exact Sciences and Technology, Federal University of Sao Carlos (UFSCar), 13565-905 Sao Carlos, Sao Paulo, Brazil
| | - Raphael G Lopes
- Sao Carlos Institute of Physics/University of Sao Paulo, PO Box 369, 13560-970 Sao Carlos, Sao Paulo, Brazil
| | - Natalia M Inada
- Sao Carlos Institute of Physics/University of Sao Paulo, PO Box 369, 13560-970 Sao Carlos, Sao Paulo, Brazil
| | - Daniel S Correa
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970, Sao Carlos, Sao Paulo, Brazil; PPGBiotec, Center for Exact Sciences and Technology, Federal University of Sao Carlos (UFSCar), 13565-905 Sao Carlos, Sao Paulo, Brazil.
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Sroor FM, Mahrous KF, El-Kader HAMA, Othman AM, Ibrahim NS. Impact of trifluoromethyl and sulfonyl groups on the biological activity of novel aryl-urea derivatives: synthesis, in-vitro, in-silico and SAR studies. Sci Rep 2023; 13:17560. [PMID: 37845243 PMCID: PMC10579241 DOI: 10.1038/s41598-023-44753-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 10/11/2023] [Indexed: 10/18/2023] Open
Abstract
We designed and prepared a novel series of urea derivatives with/without sulfonyl group in their structures to investigate the impact of the sulfonyl group on the biological activity of the evaluated compounds. Antibacterial investigations indicated that derivatives 7, 8, 9, and 11 had the most antibacterial property of all the compounds examined, their minimum inhibitory concentrations (MICs) determined against B. mycoides, E. coli, and C. albicans, with compound 8 being the most active at a MIC value of 4.88 µg/mL. Anti-cancer activity has been tested against eight human cancer cell lines; A549, HCT116, PC3, A431, HePG2, HOS, PACA2 and BJ1. Compounds 7, 8 and 9 emerged IC50 values better than Doxorubicin as a reference drug. Compounds 7 and 8 showed IC50 = 44.4 and 22.4 μM respectively against PACA2 compared to Doxorubicin (IC50 = 52.1 μM). Compound 9 showed IC50 = 17.8, 12.4, and 17.6 μM against HCT116, HePG2, and HOS, respectively. qRT-PCR revealed the down-regulation of PALB2 in compounds 7 and 15 treated PACA2 cells. Also, the down-regulation of BRCA1 and BRCA2 was shown in compound 7 treated PC3 cells. As regard A549 cells, compound 8 decreased the expression level of EGFR and KRAS genes. While compounds 7 and 9 down-regulated TP53 and FASN in HCT116 cells. Molecular docking was done against Escherichia coli enoyl reductase and human Son of sevenless homolog 1 (SOS1) and the results showed the promising inhibition of the studied proteins.
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Affiliation(s)
- Farid M Sroor
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, 12622, Egypt.
| | - Karima F Mahrous
- Cell Biology Department, National Research Centre, Dokki, 12622, Egypt
| | | | - Abdelmageed M Othman
- Microbial Chemistry Department, Biotechnology Research Institute, National Research Centre, Dokki, 12622, Egypt
| | - Nada S Ibrahim
- Department of Chemistry (Biochemistry Branch), Faculty of Science, Cairo University, Giza, Egypt
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Mastroianni A, Greco S, Urso F, Mauro MV, Vangeli V. Does Tigecycline Have a Place in Therapy for Rickettsial Infection of the Central Nervous System? Infect Chemother 2022; 54:165-172. [PMID: 35384427 PMCID: PMC8987170 DOI: 10.3947/ic.2021.0070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 01/21/2022] [Indexed: 01/04/2023] Open
Abstract
This brief report documents the safety and efficacy of high-dose tigecycline as a salvage-therapy in in a case series of five patients with serious central nervous system (CNS) rocky mountain spotted fever (RMSF). These severily ill patients were unable to take any oral drug therapy, parenteral doxycycline was unavailable and absorption of oral doxycycline was a concern in these critically ill patients. As far as we know, we report the successfull use of tigecycline for the treatment of rickettsial meningitis for the first time in Italy. We suggest more studies on tigecycline in severe CNS infections from Rickettsia species and multi-drug resistant bacteria, especially the use of tigecycline at higher than standard doses in these life-threathening infectious diseases.
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Affiliation(s)
- Antonio Mastroianni
- Infectious & Tropical Diseases Unit, Annunziata Hub Hospital, Cosenza, Italy
| | - Sonia Greco
- Infectious & Tropical Diseases Unit, Annunziata Hub Hospital, Cosenza, Italy
| | - Filippo Urso
- Hospital Pharmacy, Annunziata Hub Hospital, Cosenza, Italy
| | | | - Valeria Vangeli
- Infectious & Tropical Diseases Unit, Annunziata Hub Hospital, Cosenza, Italy
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Wang L, Ahmad S, Wang X, Li H, Luo Y. Comparison of Antioxidant and Antibacterial Activities of Camellia Oil From Hainan With Camellia Oil From Guangxi, Olive Oil, and Peanut Oil. Front Nutr 2021; 8:667744. [PMID: 34012974 PMCID: PMC8126635 DOI: 10.3389/fnut.2021.667744] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 04/09/2021] [Indexed: 11/13/2022] Open
Abstract
Background/Aim: Camellia oil from Hainan (SY) is a unique vegetable oil in Hainan, China, due to the geographical environment and oil extraction only through simple physical treatments. To compare SY with camellia oil from Guangxi (SC), olive oil (GL), and peanut oil (HS), this study analyzed the antioxidant and antibacterial activity of four vegetable oils. Methods: Using Gallic acid, BHT as the control, Saccharomyces cerevisiae as the model organism, the antioxidant activities of vegetable oils were measured in vitro and in vivo, and the antibacterial activity was measured with the minimum inhibitory concentration (MIC) method. Results: The major contents of SY, SC, and HS were oleic Acid; the major content of GL was squalene. The highest total flavonoids content of SY was 39.50 ± 0.41 mg RE/g DW; and the highest total phenolic content of SC was 47.05 ± 0.72 mg GAE/g DW. SY exhibited the strongest scavenging activity of hydroxyl radical (HO·) and superoxide anions (O2-·), the IC50 value were 2.06 mg/mL, 0.62 mg/mL, respectively; and SC showed the strongest DPPH· and ABTS· scavenging activity and the reducing abilities. SY showed excellent effect on survival rate, protection rate, flavonoids uptake of S. cerevisiae cells, decreased MDA content and ROS level, inhibited CAT, POD, and GR enzyme activity. The absorption of SC total phenols was the highest by cells. The activity showed GL had a broad-spectrum antibacterial activity. Conclusion: Thus, SY shows potential antioxidant activity and provides an important reference value for people to choose edible vegetable oils.
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Affiliation(s)
- Lanying Wang
- College of Plant Protection, Hainan University, Haikou, China
| | - Shakil Ahmad
- College of Plant Protection, Hainan University, Haikou, China
| | - Xi Wang
- College of Plant Protection, Hainan University, Haikou, China
| | - Hua Li
- College of Plant Protection, Hainan University, Haikou, China
| | - Yanping Luo
- College of Plant Protection, Hainan University, Haikou, China
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Kato H, Satoh M, Kawahara M, Kitaura S, Yoshikawa T, Fukushi S, Dimitrova K, Wood H, Saijo M, Takayama-Ito M. Seroprevalence of Jamestown Canyon virus in the Japanese general population. BMC Infect Dis 2020; 20:790. [PMID: 33096994 PMCID: PMC7585186 DOI: 10.1186/s12879-020-05517-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 10/16/2020] [Indexed: 11/10/2022] Open
Abstract
Background Jamestown Canyon virus (JCV) is a mosquito-borne orthobunyavirus that causes acute febrile illness, meningitis, and meningoencephalitis, mainly among adults. JCV is widely distributed in North America and the number of JCV cases in the U.S. has increased in recent years. Therefore, the central nervous system disease caused by JCV can be considered a potentially re-emerging viral disease. However, the seroprevalence of JCV is unknown in Japan. The purpose of this study is to evaluate the seroprevalence of JCV in the Japanese population. Methods We used an IgG enzyme-linked immunosorbent assay (IgG-ELISA) with JCV-infected cell-lysates and/or a neutralizing (NT) antibody assay. The cut-off value of IgG-ELISA was determined using IgG-ELISA to analyze serum specimens from 37 healthy Japanese donors. IgG-ELISA was validated by assessing its sensitivity and specificity, using 38 human serum samples previously tested for the presence or absence of antibodies against JCV and snowshoe hare virus (SSHV), in an in-house NT antibody assay conducted by the Public Health Agency of Canada. The seroepidemiological study was performed using IgG-ELISA and NT antibody assay to analyze 246 human serum samples from the serum bank of the National Institute of Infectious Diseases (NIID) in Japan. Results The cut-off value of IgG-ELISA was determined at 0.20, based on the mean (− 0.075) and standard deviation (0.092) values using Japanese donors’ sera. The sensitivity and the specificity of IgG-ELISA determined using 25 JCV-positive and 4 JCV-negative serum samples were 96 and 100%, respectively. Analysis of the 246 Japanese serum samples revealed that no specimen showed a higher value than the cut-off value of IgG-ELISA, and no sample tested positive by the NT antibody assay. Conclusions Our results showed that JCV is not circulating significantly in Japan. To the best of our knowledge, this is the first report to demonstrate the seroprevalence of JCV in the general population in Japan.
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Affiliation(s)
- Hirofumi Kato
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Masaaki Satoh
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Madoka Kawahara
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Satoshi Kitaura
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Tomoki Yoshikawa
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Shuetsu Fukushi
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Kristina Dimitrova
- Zoonotic Diseases and Special Pathogens Division, Public Health Agency of Canada, 1015 Arlington Street Winnipeg, Winnipeg, Manitoba, R3E 3R2, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens Division, Public Health Agency of Canada, 1015 Arlington Street Winnipeg, Winnipeg, Manitoba, R3E 3R2, Canada
| | - Masayuki Saijo
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Mutsuyo Takayama-Ito
- Department of Virology 1, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
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