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Gatica-Ortega ME, Pastor-Nieto MA, Giménez-Arnau AM, Mercader-García P, Sanz-Sánchez T, Carrascosa-Carrillo JM, Córdoba-Guijarro S, Sánchez-Pérez J, Silvestre JF, Frutos FJOD, Tous-Romero F, Fernández-Redondo V, Serra-Baldrich E, Ruíz-González I, González Pérez R, Miquel-Miquel J, Guillén PSP, Hervella-García M, Heras-Mendaza F, Gómez-de-la-Fuente E, Zaragoza-Ninet V, Gilo AS, Rodríguez-Serna M, Melé-Ninot G, Descalzo MÁ, de-Vega M, García-Doval I, Borrego L. 2-Hydroxyethyl methacrylate (2-HEMA) sensitization, a global epidemic at its peak in Spain? Contact Dermatitis 2024; 90:507-513. [PMID: 38351475 DOI: 10.1111/cod.14520] [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: 10/22/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND A global epidemic of allergic contact dermatitis to (meth)acrylates has been described in relation to the widespread use of manicure products. OBJECTIVES To evaluate the frequency of sensitization to 2-hydroxyethyl methacrylate (2-HEMA) among consecutively patch tested patients with eczema in Spain; the percentage of current relevance; the MOAHLFA index; and, the potential sources of exposure to (meth)acrylates. METHODS From January 2019 to December 2022, 2-HEMA 2% pet. was prospectively patch tested in 24 REIDAC (Spanish Allergic Contact Dermatitis Registry) centres. RESULTS Six thousand one hundred thirty-four patients were consecutively patch tested with 2-HEMA 2% pet. 265/6134 (4.3%) were positive. Positive reactions of current relevance were identified to involve 184/265 (69%). The efficiency (number of patch tests needed to detect relevant positive patch test reactions) was 34 (6134/184). The variable 'occupational' was found to be significantly associated with a higher risk for relevant positive reactions to 2-HEMA (OR: 10.9; 95% CI: 8.1-14.9). CONCLUSION (Meth)acrylate sensitization is a prevalent health issue in Spain. 2-HEMA 2% pet. has been identified to be a highly effective (meth)acrylate allergy marker in the GEIDAC baseline series. The responsible authorities should implement policies guaranteeing accurate labelling of industrial, medical, and consumer materials while ensuring the enforcement of said labelling through appropriate legal means.
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Affiliation(s)
- Maria Elena Gatica-Ortega
- Dermatology Department, Complejo Hospitalario Universitario de Toledo, Toledo, Spain
- Escuela Internacional de Doctorado, Universidad de Castilla-La-Mancha, Toledo, Spain
| | - Maria Antonia Pastor-Nieto
- Escuela Internacional de Doctorado, Universidad de Castilla-La-Mancha, Toledo, Spain
- Dermatology Department, Hospital Universitario de Guadalajara, Guadalajara, Spain
- Dermatology Department, Hospital Universitario Fundacion Jiménez Díaz, Madrid, Spain
- Faculty of Medicine and Health Sciences, Medicine and Medical Specialties Department, Universidad de Alcalá, Alcalá de Henares, Spain
| | - Ana María Giménez-Arnau
- Dermatology Department, Hospital del Mar Research Institute, Universitat Pompeu Fabra, Barcelona, Spain
| | - Pedro Mercader-García
- Dermatology Department, Hospital General Universitario José Mª Morales Meseguer, Murcia, Spain
| | | | | | | | | | | | | | - Fátima Tous-Romero
- Dermatology Department, Hospital Universitario 12 de Octubre, Madrid, Spain
| | | | | | | | | | | | | | | | - Felipe Heras-Mendaza
- Dermatology Department, Hospital Universitario Fundacion Jiménez Díaz, Madrid, Spain
| | | | | | | | | | - Gemma Melé-Ninot
- Dermatology Department, Hospital Universitari Sagrat Cor - Grupo Quirónsalud, Barcelona, Spain
| | - Miguel Ángel Descalzo
- Unidad de Investigación of the Fundación Piel Sana AEDV of the Spanish Academy of Dermatology, Madrid, Spain
| | - Marina de-Vega
- Unidad de Investigación of the Fundación Piel Sana AEDV of the Spanish Academy of Dermatology, Madrid, Spain
| | - Ignacio García-Doval
- Unidad de Investigación of the Fundación Piel Sana AEDV of the Spanish Academy of Dermatology, Madrid, Spain
| | - Leopoldo Borrego
- Dermatology Department, Hospital Universitario Insular de Gran Canaria, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
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Fenech G, Fenech A, Bensefa-Colas L, Crepy MN. Three-dimensional printing: A new source of exposure to (meth) acrylates in a dental technician. Contact Dermatitis 2024; 90:534-536. [PMID: 38303406 DOI: 10.1111/cod.14512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 02/03/2024]
Affiliation(s)
- Goël Fenech
- Department of Occupational and Environmental Diseases, University Hospital of Centre of Paris, Hotel-Dieu Hospital, AP-HP, Paris, France
| | | | - Lynda Bensefa-Colas
- Department of Occupational and Environmental Diseases, University Hospital of Centre of Paris, Hotel-Dieu Hospital, AP-HP, Paris, France
- Henri Mondor Hospital, Créteil, France
- HERA Team, Université Paris Cité, CRESS-INSERM UMR-1153, Paris, France
| | - Marie-Noëlle Crepy
- Department of Occupational and Environmental Diseases, University Hospital of Centre of Paris, Hotel-Dieu Hospital, AP-HP, Paris, France
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Kakinuma H, Koyama S, Kondo T, Harata T, Furukawa H, Egusa H. In vitro evaluation of shape-memory hydrogels for removable dental prostheses and optimization of phase-transition temperature for intraoral use. J Prosthet Dent 2024; 131:708.e1-708.e8. [PMID: 38383280 DOI: 10.1016/j.prosdent.2024.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 02/23/2024]
Abstract
STATEMENT OF PROBLEM Removable dental prostheses require periodic relining with the loss of intaglio surface fit because of mucosal shape changes over time. Therefore, a new material with high adaptability to tissue changes over time would be beneficial. PURPOSE This study focused on a shape-memory gel (SMG) that softens when heated, retains its shape when cooled, and returns to its original shape when reheated. The purpose was to optimize SMG for intraoral use by controlling the ratio of 2 acrylate monomers and to evaluate the changes in the shape memory and physical properties of SMG with temperature and to evaluate biocompatibility. MATERIAL AND METHODS SMG specimens were synthesized using the following mixing ratios of 2 monomers, docosyl acrylate (DA) and stearyl acrylate (SA): 0:100, 25:75, 50:50, 75:25, and 100:0. SMG specimens were photopolymerized using a fluorescent light-polymerizing unit. To evaluate shape memory as a function of temperature, permanent deformation was measured based on the standardized compression set test for thermoplastic rubber. For evaluation of the physical properties and cytotoxicity, a 3-dimensionally printed denture base material was used as the control material. All assessments were compared between the groups by using 1-way analysis of variance followed by the Tukey-Kramer multiple comparison test (α=.05). RESULTS SMGs with a higher amount of DA maintained their compressed shape at room and intraoral temperatures. However, the SMG matrices softened and recovered their original shapes above 60 °C. SMGs showed Shore A hardness equivalent to that of the denture-base polymer material at intraoral temperatures because of the high phase-transition temperature. The low water solubility of SMGs supported the biocompatibility test results. CONCLUSIONS SMG, in which the phase-transition temperature was controlled by mixing acrylate monomers with different melting points, exhibited shape memory in the intraoral environment. The results indicate the feasibility of applying SMG for the fabrication of removable dental prostheses because of its high adaptability to tissue changes over time and biocompatibility.
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Affiliation(s)
- Hiroaki Kakinuma
- Graduate student, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Miyagi, Japan
| | - Shigeto Koyama
- Associate Professor, Maxillofacial Prosthetics Clinic, Tohoku University Hospital, Miyagi, Japan.
| | - Takeru Kondo
- Assistant Professor, Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Miyagi, Japan
| | - Takayuki Harata
- Dental Technician, Dental Laboratory, Tohoku University Hospital, Miyagi, Japan
| | - Hidemitsu Furukawa
- Professor, Department of Mechanical Systems Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Hiroshi Egusa
- Professor, Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Miyagi, Japan
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Wu Y, Zhang XF, Bai Y, Yu M, Yao J. Cellulose-reinforced highly stretchable and adhesive eutectogels as efficient sensors. Int J Biol Macromol 2024; 265:131115. [PMID: 38522691 DOI: 10.1016/j.ijbiomac.2024.131115] [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: 12/24/2023] [Revised: 03/18/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
A cellulose-reinforced eutectogel was constructed by deep eutectic solvent (DES) and cotton linter cellulose. Cellulose was dispersed in the ternary DES consisting of acrylic acid, choline chloride and AlCl3·6H2O. The photoinitiator was then introduced into the system to in situ polymerize acrylic acid monomer to form transparent and ionic conductive eutectogels while keeping all the DES. The crosslinks formed by Al3+ induced ionic bonds and reversible links formed by hydrogen bonds give the eutectogels high stretchability (3200 ± 200 % tensile strain), self-adhesive (52.1 kPa to glass), self-healing and good mechanical strength (670 kPa). The eutectogels were assembled into sensors and epidermal patch electrodes that demonstrated high quality human motion sensing and physiological signal detection (electrocardiogram and electromyography). This work provides a facile way to design flexible electronics for sensing.
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Affiliation(s)
- Yufang Wu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xiong-Fei Zhang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Yunhua Bai
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Mengjiao Yu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Jianfeng Yao
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
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Yamasaki K, Dantam J, Sasanuma K, Hisamura R, Mizuno Y, Hui A, Jones L. Impact of in vitro lens deposition and removal on bacterial adhesion to orthokeratology contact lenses. Cont Lens Anterior Eye 2024; 47:102104. [PMID: 38161140 DOI: 10.1016/j.clae.2023.102104] [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: 09/14/2023] [Revised: 11/22/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024]
Abstract
PURPOSE The purpose of this study was to explore the impact of several contact lens (CL) care solutions on the removal of proteins and lipids, and how deposit removal impacts bacterial adhesion and solution disinfection. METHODS Lysozyme and lipid deposition on three ortho-k (rigid) and two soft CL materials were evaluated using an ELISA kit and gas chromatography respectively. Bacterial adhesion to a fluorosilicone acrylate material using Pseudomonas aeruginosa with various compositions of artificial tear solutions (ATS), including with denatured proteins, was also investigated. The impact of deposition of the different formulations of ATS on biofilm formation was explored using cover slips. Finally, the lysozyme and lipid cleaning efficacy and disinfection efficacy against P. aeruginosa and Staphylococcus aureus of four different contact lens care solutions were studied using qualitative analysis. RESULTS While maximum lysozyme deposition was observed with the fluorosilicone acrylate material (327.25 ± 54.25 µg/lens), the highest amount of lipid deposition was recorded with a fluoro-siloxanyl styrene material (134.71 ± 19.87 µg/lens). Adhesion of P. aeruginosa to fluorosilicone acrylate lenses and biofilm formation on cover slips were significantly greater with the addition of denatured proteins and lipids. Of the four contact lens care solutions investigated, the solution based on povidone-iodine removed both denatured lysozyme and lipid deposits and could effectively disinfect against P. aeruginosa and S. aureus when contaminated with denatured proteins and lipids. In contrast, the peroxide-based solution was able to inhibit P. aeruginosa growth only, while the two multipurpose solutions were unable to disinfect lenses contaminated with denatured proteins and lipids. CONCLUSION Bacterial adhesion and biofilm formation is influenced by components within artificial tear solutions depositing on lenses, including denatured proteins and lipids, which also affects disinfection. The ability of different solutions to remove these deposits should be considered when selecting systems to clean and disinfect ortho-k lenses.
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Affiliation(s)
| | - Jaya Dantam
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Ontario, Canada
| | | | | | - Yohei Mizuno
- Kobe Research Center, OPHTECS Corporation, Kobe, Japan
| | - Alex Hui
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Ontario, Canada; School of Optometry and Vision Science, Faculty of Medicine and Health, UNSW Sydney, Australia.
| | - Lyndon Jones
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Ontario, Canada; Centre for Eye and Vision Research (CEVR), Hong Kong Special Administrative Region, Hong Kong
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Ulriksdotter J, Sukakul T, Bruze M, Mowitz M, Ofenloch R, Svedman C. Contact Allergy to Allergens in the Swedish Baseline Series Overrepresented in Diabetes Patients with Skin Reactions to Medical Devices - A Retrospective Study from Southern Sweden. Acta Derm Venereol 2024; 104:adv19676. [PMID: 38551376 PMCID: PMC11000652 DOI: 10.2340/actadv.v104.19676] [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: 09/27/2023] [Accepted: 01/23/2024] [Indexed: 04/02/2024] Open
Abstract
Allergic contact dermatitis is reported among individuals using continuous glucose monitoring systems and insulin pumps. The aim of this study was to describe contact allergy patterns for allergens in the Swedish baseline series and medical device-related allergens among users. Contact allergy to baseline series allergens and isobornyl acrylate was compared between diabetes patients and dermatitis patients patch-tested at the Department of Occupational and Environmental Dermatology during 2017 to 2020. Fifty- four diabetes patients and 2,567 dermatitis patients were included. The prevalence of contact allergy to fragrance mix II and sesquiterpene lactone mix was significantly higher in diabetes patients compared with dermatitis patients. Of the diabetes patients 13.0% and of the dermatitis patients 0.5% tested positive to sesquiterpene lactone mix (p < 0.001). Of the diabetes patients 7.4% and of the dermatitis patients 2.3% tested positive to fragrance mix II (p = 0.041). Of the diabetes patients 70.4% tested positive to medical device-related allergens. Of the diabetes patients 63.0% and of the dermatitis patients 0.2% were allergic to isobornyl acrylate (p < 0.001). In conclusion, not only medical device-related contact allergies, but also contact allergy to baseline series allergens (fragrance mix II and sesquiterpene lactone mix), is overrepresented in diabetes patients who use medical devices.
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Affiliation(s)
- Josefin Ulriksdotter
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, Malmö, Sweden; Department of Dermatology, Helsingborg Hospital, Helsingborg, Sweden .
| | - Thanisorn Sukakul
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Magnus Bruze
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Martin Mowitz
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Robert Ofenloch
- Occupational Dermatology, Department of Dermatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Cecilia Svedman
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, Malmö, Sweden
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Morimoto T, Izumi H, Tomonaga T, Nishida C, Kawai N, Higashi Y, Wang KY, Ono R, Sumiya K, Sakurai K, Moriyama A, Takeshita JI, Yamasaki K, Yatera K, Morimoto Y. The Effects of Endoplasmic Reticulum Stress via Intratracheal Instillation of Water-Soluble Acrylic Acid Polymer on the Lungs of Rats. Int J Mol Sci 2024; 25:3573. [PMID: 38612383 PMCID: PMC11011863 DOI: 10.3390/ijms25073573] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/13/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
Polyacrylic acid (PAA), an organic chemical, has been used as an intermediate in the manufacture of pharmaceuticals and cosmetics. It has been suggested recently that PAA has a high pulmonary inflammatory and fibrotic potential. Although endoplasmic reticulum stress is induced by various external and intracellular stimuli, there have been no reports examining the relationship between PAA-induced lung injury and endoplasmic reticulum stress. F344 rats were intratracheally instilled with dispersed PAA (molecular weight: 269,000) at low (0.5 mg/mL) and high (2.5 mg/mL) doses, and they were sacrificed at 3 days, 1 week, 1 month, 3 months and 6 months after exposure. PAA caused extensive inflammation and fibrotic changes in the lungs' histopathology over a month following instillation. Compared to the control group, the mRNA levels of endoplasmic reticulum stress markers Bip and Chop in BALF were significantly increased in the exposure group. In fluorescent immunostaining, both Bip and Chop exhibited co-localization with macrophages. Intratracheal instillation of PAA induced neutrophil inflammation and fibrosis in the rat lung, suggesting that PAA with molecular weight 269,000 may lead to pulmonary disorder. Furthermore, the presence of endoplasmic reticulum stress in macrophages was suggested to be involved in PAA-induced lung injury.
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Affiliation(s)
- Toshiki Morimoto
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (T.M.); (K.Y.); (K.Y.)
| | - Hiroto Izumi
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (H.I.); (T.T.); (N.K.)
| | - Taisuke Tomonaga
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (H.I.); (T.T.); (N.K.)
| | - Chinatsu Nishida
- Department of Environmental Health Engineering, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan;
| | - Naoki Kawai
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (H.I.); (T.T.); (N.K.)
| | - Yasuyuki Higashi
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (T.M.); (K.Y.); (K.Y.)
| | - Ke-Yong Wang
- Shared-Use Research Center, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan;
| | - Ryohei Ono
- Department of Chemistry and Biochemistry, The University of Kitakyushu, 1-1, Hibikino, Wakamatsu-ku, Kitakyushu 808-0135, Japan; (R.O.); (K.S.); (K.S.)
| | - Kazuki Sumiya
- Department of Chemistry and Biochemistry, The University of Kitakyushu, 1-1, Hibikino, Wakamatsu-ku, Kitakyushu 808-0135, Japan; (R.O.); (K.S.); (K.S.)
| | - Kazuo Sakurai
- Department of Chemistry and Biochemistry, The University of Kitakyushu, 1-1, Hibikino, Wakamatsu-ku, Kitakyushu 808-0135, Japan; (R.O.); (K.S.); (K.S.)
| | - Akihiro Moriyama
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan; (A.M.); (J.-i.T.)
| | - Jun-ichi Takeshita
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan; (A.M.); (J.-i.T.)
| | - Kei Yamasaki
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (T.M.); (K.Y.); (K.Y.)
| | - Kazuhiro Yatera
- Department of Respiratory Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (T.M.); (K.Y.); (K.Y.)
| | - Yasuo Morimoto
- Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata-nishi-ku, Kitakyushu 807-8555, Japan; (H.I.); (T.T.); (N.K.)
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Song X, Chen T, Chen Z, Du L, Qiu X, Zhang Y, Li Y, Zhu Y, Tan Z, Mo Y, Feng X. Micro(nano)plastics in human urine: A surprising contrast between Chongqing's urban and rural regions. Sci Total Environ 2024; 917:170455. [PMID: 38286288 DOI: 10.1016/j.scitotenv.2024.170455] [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: 10/09/2023] [Revised: 12/12/2023] [Accepted: 01/24/2024] [Indexed: 01/31/2024]
Abstract
Microplastics (100 nm-5 mm) and nanoplastics (<100 nm) collectively referred to as micro(nano)plastics (MNPs), which are emerging pollutants all over the world. Environmental differences affect its distribution. The content of MNPs differs between urban and rural environments, according to previous studies. To understand the actual situation of human exposure to MNPs in various environments, this study collected 12 urine samples from volunteers in urban and rural regions of Chongqing and used pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and laser direct infrared spectroscopy (LDIR) to detect and analyze MNPs in urine. With an average abundance of 1.50 (2.31) mg/kg, MNPs were found in 9 samples by Py-GC/MS. Polyethylene (PE), polyvinyl chloride (PVC) and polyamide 66 (PA66), three different types of MNPs were found, with PE content being the highest among them. By using LDIR, MNPs were found in 7 samples, with an average abundance of 15.17 (23.13) particles/kg. Five different types of MNPs were found, with acrylates (ACR) being the main type, followed by polymethylmethacrylate (PMMA), polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET). The findings demonstrated that urban region had much greater levels and more types of MNPs in human urine than rural. Additionally, regular contact with plastic toys and the use of personal care products are linked to the presence of MNPs. The influence of environmental factors on the actual exposure of the human body to MNPs was preliminary explored in this study, and two different methods were used for the first time to simultaneously detect and analyze MNPs in human urine. This allowed for the feasibility of comprehensively and effectively quantitatively analyzing the actual exposure of the human body to MNPs, and also provided the theoretical foundation for further research on the harm of MNPs to human health in different environments.
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Affiliation(s)
- Xuan Song
- Center of Reproductive Medicine, Chengdu BOE Hospital, Chengdu 610219, China
| | - Tian Chen
- Health Management Center, Chongqing University Three Gorges Hospital, Chongqing 404010, China
| | - Zongwen Chen
- Department of Comprehensive Pediatric Internal Medicine, Chongqing University Three Gorges Hospital, Chongqing 404010, China
| | - Lixia Du
- Department of Gastroenterology, Chengdu BOE Hospital, Chengdu 610219, China
| | - Xihong Qiu
- Department of Obstetrics and Gynecology, Chengdu BOE Hospital, Chengdu 610219, China
| | - Yuxin Zhang
- Department of Obstetrics and Gynecology, Chengdu BOE Hospital, Chengdu 610219, China
| | - Yan Li
- Health Management Center, Chongqing University Three Gorges Hospital, Chongqing 404010, China
| | - Yu Zhu
- Department of Radiology, Yunnan Cancer Hospital (the Third Affiliated Hospital of Kunming Medical University), Kunming 650118, China
| | - Zhongyou Tan
- Department of Comprehensive Pediatric Internal Medicine, Chongqing University Three Gorges Hospital, Chongqing 404010, China
| | - Yunbo Mo
- Department of Pediatric Respiratory Medicine, Chongqing University Three Gorges Hospital, Chongqing 404010, China
| | - Xiaoqian Feng
- Department of Comprehensive Pediatric Internal Medicine, Chongqing University Three Gorges Hospital, Chongqing 404010, China.
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Mahjoubnia A, Cai D, Wu Y, King SD, Torkian P, Chen AC, Talaie R, Chen SY, Lin J. Digital light 4D printing of bioresorbable shape memory elastomers for personalized biomedical implantation. Acta Biomater 2024; 177:165-177. [PMID: 38354873 PMCID: PMC10948293 DOI: 10.1016/j.actbio.2024.02.009] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/16/2024] [Accepted: 02/06/2024] [Indexed: 02/16/2024]
Abstract
Four-dimensional (4D) printing unlocks new potentials for personalized biomedical implantation, but still with hurdles of lacking suitable materials. Herein, we demonstrate a bioresorbable shape memory elastomer (SME) with high elasticity at both below and above its phase transition temperature (Ttrans). This SME can be digital light 3D printed by co-polymerizing glycerol dodecanoate acrylate prepolymer (pre-PGDA) with acrylic acid monomer to form crosslinked Poly(glycerol dodecanoate acrylate) (PGDA)-Polyacrylic acid (PAA), or PGDA-PAA network. The printed complex, free-standing 3D structures with high-resolution features exhibit shape programming properties at a physiological temperature. By tuning the pre-PGDA weight ratios between 55 wt% and 70 wt%, Ttrans varies between 39.2 and 47.2 ℃ while Young's moduli (E) range 40-170 MPa below Ttrans with fractural strain (εf) of 170 %-200 %. Above Ttrans, E drops to 1-1.82 MPa which is close to those of soft tissue. Strikingly, εf of 130-180 % is still maintained. In vitro biocompatibility test on the material shows > 90 % cell proliferation and great cell attachment. In vivo vascular grafting trials underline the geometrical and mechanical adaptability of these 4D printed constructs in regenerating the aorta tissue. Biodegradation of the implants shows the possibility of their full replacement by natural tissue over time. To highlight its potential for personalized medicine, a patient-specific left atrial appendage (LAA) occluder was printed and implanted endovascularly into an in vitro heart model. STATEMENT OF SIGNIFICANCE: 4D printed shape-memory elastomer (SME) implants particularly designed and manufactured for a patient are greatly sought-after in minimally invasive surgery (MIS). Traditional shape-memory polymers used in these implants often suffer from issues like unsuitable transition temperatures, poor biocompatibility, limited 3D design complexity, and low toughness, making them unsuitable for MIS. Our new SME, with an adjustable transition temperature and enhanced toughness, is both biocompatible and naturally degradable, particularly in cardiovascular contexts. This allows implants, like biomedical scaffolds, to be programmed at room temperature and then adapt to the body's physiological conditions post-implantation. Our studies, including in vivo vascular grafts and in vitro device implantation, highlight the SME's effectiveness in aortic tissue regeneration and its promising applications in MIS.
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Affiliation(s)
- Alireza Mahjoubnia
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, 65211, USA
| | - Dunpeng Cai
- Department of Surgery, School of Medicine, University of Missouri, Columbia, 65211, USA
| | - Yuchao Wu
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, 65211, USA
| | - Skylar D King
- Department of Surgery, School of Medicine, University of Missouri, Columbia, 65211, USA
| | - Pooya Torkian
- Vascular and Interventional Radiology, Department of Radiology, University of Minnesota, Minneapolis, 55455, USA
| | - Andy C Chen
- Department of Surgery, School of Medicine, University of Missouri, Columbia, 65211, USA; North Oconee High School, Bogart, GA 30622, USA
| | - Reza Talaie
- Vascular and Interventional Radiology, Department of Radiology, University of Minnesota, Minneapolis, 55455, USA
| | - Shi-You Chen
- Department of Surgery, School of Medicine, University of Missouri, Columbia, 65211, USA.
| | - Jian Lin
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, 65211, USA.
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10
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Rader C, Fritz PW, Ashirov T, Coskun A, Weder C. One-Component Nanocomposites Made from Diblock Copolymer Grafted Cellulose Nanocrystals. Biomacromolecules 2024; 25:1637-1648. [PMID: 38381566 PMCID: PMC10934803 DOI: 10.1021/acs.biomac.3c01196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
Cellulose nanocrystals (CNCs) are bio-based, rod-like, high-aspect-ratio nanoparticles with high stiffness and strength and are widely used as a reinforcing nanofiller in polymer nanocomposites. However, due to hydrogen-bond formation between the large number of hydroxyl groups on their surface, CNCs are prone to aggregate, especially in nonpolar polymer matrices. One possibility to overcome this problem is to graft polymers from the CNCs' surfaces and to process the resulting "hairy nanoparticles" (HNPs) into one-component nanocomposites (OCNs) in which the polymer matrix and CNC filler are covalently connected. Here, we report OCNs based on HNPs that were synthesized by grafting gradient diblock copolymers onto CNCs via surface-initiated atom transfer radical polymerization. The inner block (toward the CNCs) is composed of poly(methyl acrylate) (PMA), and the outer block comprises a gradient copolymer rich in poly(methyl methacrylate) (PMMA). The OCNs based on such HNPs microphase separate into a rubbery poly(methyl acrylate) phase that dissipates mechanical energy and imparts toughness, a glassy PMMA phase that provides strength and stiffness, and well-dispersed CNCs that further reinforce the materials. This design afforded OCNs that display a considerably higher stiffness and strength than reference diblock copolymers without the CNCs. At the same time, the extensibility remains high and the toughness is increased up to 5-fold relative to the reference materials.
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Affiliation(s)
- Chris Rader
- Adolphe
Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Patrick W. Fritz
- Department
of Chemistry, University of Fribourg, Chemin de Musee 9, 1700 Fribourg, Switzerland
| | - Timur Ashirov
- Department
of Chemistry, University of Fribourg, Chemin de Musee 9, 1700 Fribourg, Switzerland
| | - Ali Coskun
- Department
of Chemistry, University of Fribourg, Chemin de Musee 9, 1700 Fribourg, Switzerland
| | - Christoph Weder
- Adolphe
Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
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11
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de Paula FM, Frota OP, Ruiz JS, Braulio IC, do Nascimento Gonçalves FC, Ferreira-Júnior MA, Sonobe HM, Ferreira DN, Pompeo CM, de Sousa AFL. Safety and efficacy of silicone tape for indwelling urinary catheter fixation in intensive care patients-A randomized clinical trial. Nurs Crit Care 2024; 29:347-356. [PMID: 37264262 DOI: 10.1111/nicc.12937] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/19/2023] [Accepted: 05/18/2023] [Indexed: 06/03/2023]
Abstract
BACKGROUND Critically ill patients are more vulnerable to medical adhesive-related skin injuries (MARSI), whose prevention is a constant challenge and one of the main quality indicators of nursing care. MARSI associated with indwelling urinary catheter (IUC) fixation is a relevant adverse event, mainly because of the constant involuntary traction and high skin vulnerability of the fixation site. Silicone adhesive tape has appreciable qualities for fragile skin among the range of adhesives, leading to the inference that it reduces the risk of MARSI. AIM To compare silicone adhesive tape for IUC fixation with acrylate tape regarding its safety and efficacy. STUDY DESIGN This was a randomized controlled trial blinded to the patients and evaluator. Data were collected from an intensive care unit (ICU) of a tertiary university hospital in Brazil. Patients with IUC and no MARSI at the fixation site were considered eligible. The omega (Ω) fixation technique was used for IUC fixation. A total of 132 participants were enrolled and divided into two research groups: 66 patients in the intervention group (silicone tape) and 66 in the control group (acrylate tape). Outcomes were the incidence of MARSI, patient outcome in the ICU and hospital and partial, total and overall spontaneous detachment of the tapes. RESULTS The overall incidence of MARSI was 28%, with 21% in the silicone group and 35% in the acrylate group, with no statistically significant difference (p = .121), including the severity of the lesions (p = .902). However, partial (p = .003) and overall (p < .001) detachment of the tapes were more frequent in the silicone group. CONCLUSIONS Silicone tape is no safer than acrylate tape for IUC fixation and is less adhesively effective. RELEVANCE TO CLINICAL PRACTICE There is no evidence to support the extensive use of silicone tape in this context.
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Affiliation(s)
| | - Oleci Pereira Frota
- School of Nursing, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Juliana Silva Ruiz
- School of Nursing, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | | | | | | | - Helena Megumi Sonobe
- Ribeirao Preto College of Nursing, University of Sao Paulo, Ribeirão Preto, Brazil
| | | | - Carolina Mariano Pompeo
- School of Nursing, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
- Maria Aparecida Pedrossian University Hospital, Campo Grande, Brazil
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12
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Kuscu HY, Kurkcuoglu I, Kucukesmen HC. The Impact of Gastric Juice on the Surface Roughness of Surface Sealant-Treated Provisional Restorations. Niger J Clin Pract 2024; 27:304-309. [PMID: 38528349 DOI: 10.4103/njcp.njcp_317_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 12/01/2023] [Indexed: 03/27/2024]
Abstract
BACKGROUND AND AIM Gastroesophageal reflux disease causes gastric acid to enter the oral cavity, leading to mucosal changes and deterioration of dental hard tissues and materials. The purpose of this in vitro study was to evaluate the impact of gastric juice on the surface roughness of two types of acrylics used in provisional restorations. MATERIALS AND METHODS Acrytemp ® and Temdent acrylic resin discs (10 × 2 mm) totaling 80 were manufactured and divided into eight groups (n = 10). Groups were prepared as follows: Group 1 (Temdent + Universal Polish) (control), Group 2 (Temdent + Universal Polish + Biscover LV), Group 3 (Temdent + Universal Polish + Resin Glaze), Group 4 (Temdent + Universal Polish + Fortify Plus), Group 5 (Acrytemp + Universal Polish) (control), Group 6 (Acrytemp + Universal Polish + Biscover LV), Group 7 (Acrytemp + Universal Polish + Resin Glaze), and Group 8 (Acrytemp + Universal Polish + Fortify Plus). The resin discs were immersed in distilled water for 24 h and in gastric juice (pH = 2) for additional 24 h. The initial and final roughness values of samples were measured and analyzed with non-parametric statistics including Mann-Whitney U-test for pairwise comparison, Kruskall Wallis test for comparing more than two groups, and Wilcoxon signed rank test for within-group comparison (P < 0.05). RESULTS Surface roughness did not differ significantly between control groups. It notably increased for all samples with surface sealants, both initially and after gastric juice immersion (P < 0.05). CONCLUSION Surface sealants noticeably increased the roughness of two types of acrylic resins. After immersing in gastric juice, Group 4 (Temdent + Universal Polish + Fortify Plus) showed the highest roughness, while the untreated control groups remained the smoothest.
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Affiliation(s)
- Hy Yay Kuscu
- Department of Prosthodontics, Faculty of Dentistry, Mehmet Akif Ersoy University, Burdur, Turkey
| | - I Kurkcuoglu
- Department of Prosthodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey
| | - H C Kucukesmen
- Department of Prosthodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey
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13
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Bardajee GR, Ghadimkhani R, Jafarpour F. A biocompatible double network hydrogel based on poly (acrylic acid) grafted onto sodium alginate for doxorubicin hydrochloride anticancer drug release. Int J Biol Macromol 2024; 260:128871. [PMID: 38123038 DOI: 10.1016/j.ijbiomac.2023.128871] [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: 10/09/2023] [Revised: 12/03/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
This study involved the synthesis of a new biocompatible slow-release hydrogel named poly (acrylic acid) grafted onto sodium alginate (poly (AA-g-SA)) double network hydrogel (DNH). The hydrogel was created by polymerization of acrylic acid grafted onto sodium alginate polysaccharide using crosslinkers N,N'-methylenebisacrylamide and calcium chloride via free radical polymerization. The water absorbency of the poly (AA-g-SA) double network hydrogel was improved by optimizing the quantities of ammonium persulfate initiator, pH-sensitive monomer of acrylic acid, and crosslinkers. Various analytical techniques including attenuated total reflection Fourier-transformed infrared (ATR-FTIR), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), and Brunauer-Emmett-Teller specific surface area analysis (BET) were used to characterize the synthesized hydrogels. The swelling and on-off switching behaviors of the hydrogels were investigated in deionized (DI) water at different temperatures and pH values. The optimum poly (AA-g-SA) DNH was tested for in vitro release of a hydrophilic chemotherapeutic drug, doxorubicin hydrochloride (DOX). The eco-friendly hydrogel favorably optimized the DOX slow release owing to its swelling rate, high absorption and regeneration capabilities. The findings of this study may have significant implications for medical and scientific research.
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Affiliation(s)
| | - Roghieh Ghadimkhani
- Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, Iran
| | - Farnaz Jafarpour
- School of Chemistry, College of Science, University of Tehran, 14155-6455, Tehran, Iran
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14
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Li L, Liu X, Yang C, Li T, Wang W, Guo H, Lei Z. Synthesis of soybean soluble polysaccharide-based eco-friendly emulsions for soil erosion prevention and control. Int J Biol Macromol 2024; 262:130042. [PMID: 38342266 DOI: 10.1016/j.ijbiomac.2024.130042] [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: 10/18/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/13/2024]
Abstract
This paper introduces the synthesis of an environmentally friendly emulsion that can be used as a soil anti-water erosion material. SSPS-g-P(BA-co-MMA-co-AA) emulsions were prepared using free radical copolymerization with soybean soluble polysaccharide (SSPS), acrylic acid (AA), butyl acrylate (BA), and methyl methacrylate (MMA). The structure, thermal stability, and morphology were characterized using FT-IR,TG,SEM, and particle diameter analysis. The resistance to water erosion, compressive strength and water retention of emulsion-treated loess/laterite was studied and germination tests were conducted. The results demonstrated that the duration of washout resistance of loess with 0.50 wt% emulsion exceeded 99 h, and the water erosion rate was 56.0 % after 72 h, while the water erosion rate of pure loess is 100.0 % after 4 min;the duration of washout resistance of laterite with 0.50 wt% emulsion exceeded 2 h, which was 8 times longer than pure laterite;The compressive strengths of 0.5 wt% emulsion-treated loess/laterite were 3.5 Mpa and 5.8 MPa, respectively, which were 7 and 9 times higher than that of pure soil. The plant seeds germinated normally half a month after planting. These findings suggest that emulsions can be used to control soil erosion without affecting the germination of plant seeds.
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Affiliation(s)
- Li Li
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Xiaomei Liu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Cailing Yang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Tingli Li
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Weiqiang Wang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Haonian Guo
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ziqiang Lei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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15
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Elshahawy MF, Ahmed NA, Gad YH, Ali AEH. Efficient photocatalytic remediation of lerui acid brilliant blue dye using radiation- prepared carboxymethyl cellulose/acrylic acid hydrogel supported by ZnO@Ag. Int J Biol Macromol 2024; 262:129946. [PMID: 38340936 DOI: 10.1016/j.ijbiomac.2024.129946] [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: 11/17/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Organic dye pollution from textiles and other industries presents a substantial risk to people and aquatic life. The use of photocatalysis to decolorize water using the strength of UV light is one of the most important remediation techniques. In the present study, a novel nanocomposites hydrogel including carboxymethyl cellulose (CMC), acrylic acid (AAc), Zinc oxide (ZnO), and silver (Ag) nanoparticles was produced using an eco-friendly γ-irradiation technique for photocatalytic decolorization applications. ZnO and Ag nanoparticles were distributed in the CMC/AAc hydrogel matrix without significant aggregation. SEM, XRD, EDX, TEM, and FTIR analyses were used to assess the physicochemical characteristics of the nanocomposite samples. Carboxymethyl cellulose/acrylic acid/Zinc oxide doped silver (CMC/PAAc/ZnO@Ag) nanocomposite hydrogels were developed and utilized in the photocatalytic decolorization of the lerui acid brilliant blue dye (LABB) when exposed to ultraviolet (UV) radiation. UV- Vis spectrophotometry was utilized to analyze the optical properties of the produced nanostructure. Regarding the decolorization of the LABB, the impacts of operational variables were investigated. The optimum conditions for decolorization (93 %) were an initial concentration of 50 mg/L, pH = 4, catalyst dosage of 50 g/L, and exposure time of 90 min. The results illustrated that the LABB acidic dye from wastewater was remarkably decolored.
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Affiliation(s)
- Mai F Elshahawy
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Nehad A Ahmed
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Yasser H Gad
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - Amr El-Hag Ali
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
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16
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Buyse C, Mignion L, Joudiou N, Melloul S, Driesschaert B, Gallez B. Sensitive simultaneous measurements of oxygenation and extracellular pH by EPR using a stable monophosphonated trityl radical and lithium phthalocyanine. Free Radic Biol Med 2024; 213:11-18. [PMID: 38218552 PMCID: PMC10923140 DOI: 10.1016/j.freeradbiomed.2024.01.012] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/15/2024]
Abstract
The monitoring of acidosis and hypoxia is crucial because both factors promote cancer progression and impact the efficacy of anti-cancer treatments. A phosphonated tetrathiatriarylmethyl (pTAM) has been previously described to monitor both parameters simultaneously, but the sensitivity to tackle subtle changes in oxygenation was limited. Here, we describe an innovative approach combining the pTAM radical and lithium phthalocyanine (LiPc) crystals to provide sensitive simultaneous measurements of extracellular pH (pHe) and pO2. Both parameters can be measured simultaneously as both EPR spectra do not overlap, with a gain in sensitivity to pO2 variations by a factor of 10. This procedure was applied to characterize the impact of carbogen breathing in a breast cancer 4T1 model as a proof-of-concept. No significant change in pHe and pO2 was observed using pTAM alone, while LiPc detected a significant increase in tumor oxygenation. Interestingly, we observed that pTAM systematically overestimated the pO2 compared to LiPc. In addition, we analyzed the impact of an inhibitor (UK-5099) of the mitochondrial pyruvate carrier (MPC) on the tumor microenvironment. In vitro, the exposure of 4T1 cells to UK-5099 for 24 h induced a decrease in pHe and oxygen consumption rate (OCR). In vivo, a significant decrease in tumor pHe was observed in UK-5099-treated mice, while there was no change for mice treated with the vehicle. Despite the change observed in OCR, no significant change in tumor oxygenation was observed after the UK-5099 treatment. This approach is promising for assessing in vivo the effect of treatments targeting tumor metabolism.
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Affiliation(s)
- Chloe Buyse
- Biomedical Magnetic Resonance Research Group (REMA), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - Lionel Mignion
- Nuclear and Electron Spin Technologies Platform (NEST), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - Nicolas Joudiou
- Nuclear and Electron Spin Technologies Platform (NEST), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - Samia Melloul
- Biomedical Magnetic Resonance Research Group (REMA), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, School of Pharmacy & In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV, USA
| | - Bernard Gallez
- Biomedical Magnetic Resonance Research Group (REMA), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium.
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17
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Yu H, Xia Y, Liu X, Chen H, Jin Z, Wang Z. Preparation of reed fibers reinforced graft-modified starch-based adhesives based on quantum mechanical simulation and molecular dynamics simulation. Int J Biol Macromol 2024; 262:129802. [PMID: 38296149 DOI: 10.1016/j.ijbiomac.2024.129802] [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: 11/22/2023] [Revised: 01/19/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024]
Abstract
Starch is a biomass polymer material with a high yield and comprehensive source. It is used as a raw material for preparing adhesives because of its highly active hydroxyl group. However, poor adhesion and water resistance hinder the application of starch-based adhesives (SBAs). Based on this, the starch was modified through graft copolymerization with itaconic acid as a cross-linking agent, methyl methacrylate and methyl acrylate as copolymers. Additionally, reed fibers were synergistically modified with polydopamine deposition to prepare an environmentally friendly SBA used in plywood production. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H NMR), X-ray diffraction (XRD), and thermogravimetric analysis (TG) demonstrate that copolymerization of methyl methacrylate and methyl acrylate with starch improves the shear strength, water resistance, and thermal stability of the SBA. Compared to unmodified starch, the modified SBA exhibits a 129 % increase in dry strength and achieves a wet strength of 1.36 MPa. Fukui function, Frontier orbit theory, and molecular dynamics simulation have shown that itaconic acid promotes the copolymerization of starch and acrylate monomers. The modified starch has fewer hydrogen bonds, less order, and a denser macromolecular network structure, which provides a reference for studying the molecular interaction mechanisms of SBAs.
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Affiliation(s)
- Hongjian Yu
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China; College of Light Industry and Textile, Qiqihar University, Qiqihar, Heilongjiang 161000, China
| | - Ying Xia
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Xueting Liu
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Haozhe Chen
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zhixiang Jin
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zhichao Wang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
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Mignon A, Gheysens T, Walraet S, Tack P, Rigole P, Coenye T, Vincze L, Van Vlierberghe S, Dubruel P. Effect of Poly(Vinyl Pyrrolidone) on Iodine Release from Acrylate-Endcapped Urethane-Based Poly(Ethylene Glycol) Hydrogels as Antibacterial Wound Dressing. Macromol Biosci 2024; 24:e2300202. [PMID: 37913549 DOI: 10.1002/mabi.202300202] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/11/2023] [Indexed: 11/03/2023]
Abstract
Infections are still a major cause of morbidity in burn wounds. Although silver has been used strongly in past centuries as an anti-bacterial, it can lead to allergic reactions, bacterial resistance, and delayed wound healing. Iodine-based antibacterials are becoming an interesting alternative. In this work, the effect of complexation with poly(vinyl pyrrolidone) (PVP) and poly(ethylene oxide) (PEO)-based polymers is explored by using different acrylate-endcapped urethane-based poly(ethylene glycol) (AUP) polymers, varying the molar mass (MM) of the poly(ethylene glycol) (PEG) backbone, with possible addition of PVP. The higher MM AUP outperforms the swelling potential of commercial wound dressings such as Kaltostat, Aquacel Ag, and Hydrosorb and all MM show superior mechanical properties. The addition of iodine to the polymers is compared to Iso-Betadine Tulle (IBT). Interestingly, the addition of PVP does not lead to increased iodine complexation compared to the blank AUP polymers, while all have a prolonged iodine release compared to the IBT, which leads to a burst release. The observed prolonged release also leads to larger inhibition zones during antibacterial tests. Complexing iodine in AUP polymers with or without PVP leads to antimicrobial wound dressings which may hold potential for future application to treat infected wounds.
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Affiliation(s)
- Arn Mignon
- Polymer Chemistry and Biomaterials Group, Center of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-bis, 9000 Gent, Ghent, Belgium
- Smart Polymeric Biomaterials, Biomaterials and Tissue Engineering, Campus Group T, KU, Leuven, Andreas Vesaliusstraat 13, 3000, Leuven, Belgium
| | - Tom Gheysens
- Polymer Chemistry and Biomaterials Group, Center of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-bis, 9000 Gent, Ghent, Belgium
| | - Sander Walraet
- Polymer Chemistry and Biomaterials Group, Center of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-bis, 9000 Gent, Ghent, Belgium
| | - Pieter Tack
- Department of Chemistry, Ghent University, Krijgslaan 281, S12, 9000, Gent, Belgium
| | - Petra Rigole
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ottergemsesteenweg 460, Gent, 9000, Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Ottergemsesteenweg 460, Gent, 9000, Belgium
| | - Laszlo Vincze
- Department of Chemistry, Ghent University, Krijgslaan 281, S12, 9000, Gent, Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry and Biomaterials Group, Center of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-bis, 9000 Gent, Ghent, Belgium
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials Group, Center of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-bis, 9000 Gent, Ghent, Belgium
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19
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Hamadeh A, Nash JF, Bialk H, Styczynski P, Troutman J, Edginton A. Mechanistic Skin Modeling of Plasma Concentrations of Sunscreen Active Ingredients Following Facial Application. J Pharm Sci 2024; 113:806-825. [PMID: 37769994 DOI: 10.1016/j.xphs.2023.09.017] [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: 04/21/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/03/2023]
Abstract
Sunscreen products constitute two distinct categories. Recreational sunscreens protect against high-intensity, episodic sun exposure, often applied over the entire body. In contrast, facial sunscreen products are designed for sub-erythemal, low-intensity daily sun exposure. Such different exposures necessitate distinctive product safety assessments. Building on earlier methods for predicting dermal disposition, a mechanistic model was developed to simulate plasma concentrations of seven organic sunscreen active ingredients: avobenzone, ensulizole, homosalate, octinoxate, octisalate, octocrylene, and oxybenzone, following facial application. In vitro permeation testing (IVPT) was performed with two different vehicles using a subset of the UV filters. These IVPT results, in addition to previously published IVPT data and published in vivo Maximal Usage Trial (MUsT) data for the UV filters, were used to train the mechanistic dermal model via a Bayesian Markov chain Monte Carlo (MCMC) method. An external validation of the trained model with real-world in vivo datasets demonstrated that the model's predicted UV filter plasma concentrations align well with experimental measurements and capture the observed inter-individual variability. Predictions of steady-state UV filter plasma concentrations under facial application scenarios at 5% concentration and at the maximal allowable concentrations were then generated by the trained model. Oxybenzone had the greatest predicted plasma concentration following facial application. Homosalate and octisalate predictions had high uncertainty associated with the absence of data. Several application scenarios pertaining to avobenzone, ensulizole, octocrylene and octinoxate were identified in which median plasma concentration levels were at 0.5 ng/ml or below when applied in the recreational or facial product. Model limitations include uncertainty in vehicle/water partitioning, formulation metamorphosis, and UV filter systemic clearance, all of which can be refined with additional data. For UV filters, limiting exposure to facial application reduces human safety concerns based on FDA established thresholds.
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Affiliation(s)
- Abdullah Hamadeh
- School of Pharmacy, University of Waterloo, Kitchener, ON N2G 1C5, Canada; Systems In Silico Ltd., Waterloo, ON, Canada
| | - J F Nash
- The Procter & Gamble Company, Mason, OH 45040, USA
| | - Heidi Bialk
- The Estée Lauder Companies Inc., Melville, NY 11747, USA
| | | | | | - Andrea Edginton
- School of Pharmacy, University of Waterloo, Kitchener, ON N2G 1C5, Canada; Design2Code Inc., Waterloo, ON, Canada.
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20
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Salami M, Alizadeh R, Talebpour Z. Determination of breast cancer biomarkers with poly acrylic acid/ MIL-88(Fe)-NH 2 hydrogel as a coating for stir bar sorptive extraction. J Chromatogr A 2024; 1717:464708. [PMID: 38330846 DOI: 10.1016/j.chroma.2024.464708] [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: 11/12/2023] [Revised: 01/16/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
The Poly acrylic acid/MIL-88(Fe)-NH2 composite material, carefully prepared, is employed as a sorbent for the stir bar. The best formula of the composite was selected by investigation of two parameters including the cross-linker of PAA and MIL-88(Fe)-NH2 content. The prepared stir bar was used for extraction of 2-pentanone, 2-heptanone, ethyl propionate, para-xylene, 1,2,4-trimethylbenzene, o-cresol, m-cresol in urine samples as breast cancer biomarkers with gas chromatography-flame ionization detector. The prepared Poly acrylic acid / MIL-88(Fe)-NH2 as sorbent for the stir bar demonstrate good repeatability of one bar (relative standard deviation (RSD%) < 4.61 %) and satisfactory reproducibility between two bars (RSD% < 6.85 %). The central composite design method was applied for the optimization of extraction parameters. Under the optimum conditions, linear dynamic ranges for compounds were in the acceptable range with correlation coefficients higher than 0.99. Detection limits of them were less than 1.71 µg L-1.
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Affiliation(s)
- Maryam Salami
- Department of Analytical Chemistry, Faculty of Chemistry, Alzahra University, Vanak, Tehran, Iran
| | - Reza Alizadeh
- Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran.
| | - Zahra Talebpour
- Department of Analytical Chemistry, Faculty of Chemistry, Alzahra University, Vanak, Tehran, Iran; Analytical and Bioanalytical Research Centre, Alzahra University, Tehran 19938-93973, Iran.
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21
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Georgiev P, Belka M, Kroll D, Bączek T, Opiełka M, Rutkowska A, Ulenberg S. 3D-printed extraction devices fabricated from silica particles suspended in acrylate resin. J Chromatogr A 2024; 1717:464671. [PMID: 38278133 DOI: 10.1016/j.chroma.2024.464671] [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: 01/19/2024] [Accepted: 01/21/2024] [Indexed: 01/28/2024]
Abstract
In recent years, there has been an increasing worldwide interest in the use of alternative sample preparation methods. Digital light processing (DLP) is a 3D printing technique based on using UV light to form photo-curable resin layer upon layer, which results in a printed shape. This study explores the application of this technique for the development of novel drug extraction devices in analytical chemistry. A composite material consisting of a photocurable resin and C18-modified silica particles was employed as a sorbent device, demonstrating its effectiveness in pharmaceutical analysis. Apart from estimating optimal printing parameters, microscopic examination of the material surface, and sorbent powder to resin ratio, the extraction procedure was also optimised. Optimisation included the type and amount of sample matrix additives, desorption solvent, sorption and desorption times, and proper number of sorbent devices needed in extraction protocol. To demonstrate this method's applicability for sample analysis, the solid-phase extraction followed by gas chromatography coupled with mass spectrometry (SPE-GC-MS) method was validated for its ability to quantify benzodiazepine-type drugs. This evaluation confirmed good linearity in the concentration range of 50-1000 ng/mL, with R2 values being 0.9932 and 0.9952 for medazepam and diazepam, respectively. Validation parameters proved that the presented method is precise (with values ranging in-between 2.98 %-7.40 %), and accurate (88.81 % to 110.80 %). A negative control was also performed to investigate possible sorption properties of the resin itself, proving that the addition of C18-modified silica particles significantly increases the extraction efficiency and repeatability. The cost-effectiveness of this approach makes it particularly advantageous for single-use scenarios, eliminating the need for time-consuming sorbent-cleaning procedures, common in traditional solid-phase extraction techniques. Future optimisation opportunities include refining sorbent size, shape, and geometry to achieve lower limits of quantification. As a result of these findings, 3D-printed extraction devices can serve as a viable alternative to commercially available SPE or solid-phase microextraction (SPME) protocols for studying new sample preparation approaches.
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Affiliation(s)
- Paweł Georgiev
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland
| | - Mariusz Belka
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland
| | - Dagmara Kroll
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland
| | - Tomasz Bączek
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland
| | - Mikołaj Opiełka
- Brain Diseases Centre, Medical University of Gdańsk, 80-211 Gdańsk, Poland
| | - Aleksandra Rutkowska
- Department of Anatomy, Division of Anatomy and Neurobiology, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland; Brain Diseases Centre, Medical University of Gdańsk, 80-211 Gdańsk, Poland
| | - Szymon Ulenberg
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland.
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22
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Kalogeropoulou M, Díaz-Payno PJ, Mirzaali MJ, van Osch GJVM, Fratila-Apachitei LE, Zadpoor AA. 4D printed shape-shifting biomaterials for tissue engineering and regenerative medicine applications. Biofabrication 2024; 16:022002. [PMID: 38224616 DOI: 10.1088/1758-5090/ad1e6f] [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: 08/30/2023] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
The existing 3D printing methods exhibit certain fabrication-dependent limitations for printing curved constructs that are relevant for many tissues. Four-dimensional (4D) printing is an emerging technology that is expected to revolutionize the field of tissue engineering and regenerative medicine (TERM). 4D printing is based on 3D printing, featuring the introduction of time as the fourth dimension, in which there is a transition from a 3D printed scaffold to a new, distinct, and stable state, upon the application of one or more stimuli. Here, we present an overview of the current developments of the 4D printing technology for TERM, with a focus on approaches to achieve temporal changes of the shape of the printed constructs that would enable biofabrication of highly complex structures. To this aim, the printing methods, types of stimuli, shape-shifting mechanisms, and cell-incorporation strategies are critically reviewed. Furthermore, the challenges of this very recent biofabrication technology as well as the future research directions are discussed. Our findings show that the most common printing methods so far are stereolithography (SLA) and extrusion bioprinting, followed by fused deposition modelling, while the shape-shifting mechanisms used for TERM applications are shape-memory and differential swelling for 4D printing and 4D bioprinting, respectively. For shape-memory mechanism, there is a high prevalence of synthetic materials, such as polylactic acid (PLA), poly(glycerol dodecanoate) acrylate (PGDA), or polyurethanes. On the other hand, different acrylate combinations of alginate, hyaluronan, or gelatin have been used for differential swelling-based 4D transformations. TERM applications include bone, vascular, and cardiac tissues as the main target of the 4D (bio)printing technology. The field has great potential for further development by considering the combination of multiple stimuli, the use of a wider range of 4D techniques, and the implementation of computational-assisted strategies.
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Affiliation(s)
- Maria Kalogeropoulou
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
| | - Pedro J Díaz-Payno
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
- Department of Orthopedics and Sports Medicine, Erasmus MC University Medical Center, 3015 CN Rotterdam, The Netherlands
| | - Mohammad J Mirzaali
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
| | - Gerjo J V M van Osch
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
- Department of Orthopedics and Sports Medicine, Erasmus MC University Medical Center, 3015 CN Rotterdam, The Netherlands
- Department of Otorhinolaryngology, Head and Neck Surgery, Erasmus MC University Medical Center, 3015 CN Rotterdam, The Netherlands
| | - Lidy E Fratila-Apachitei
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
| | - Amir A Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Delft, CD 2628, The Netherlands
- Department of Orthopedics, Leiden University Medical Center, Leiden, The Netherlands
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23
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Kido T, Sugaya C, Hano H, Yanagisawa H, Suka M. Intratracheal administration of cross-linked water-soluble acrylic acid polymer is associated with inducible bronchi-related lymphoid tissue formation and allergic inflammation. Immunology 2024; 171:250-261. [PMID: 37960993 DOI: 10.1111/imm.13715] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023] Open
Abstract
In a Japanese chemical factory, lung diseases such as pneumoconiosis have been reported among workers handling cross-linked water-soluble acrylic acid polymers (CWAAP). Our previous study reported that a single intratracheal administration of CWAAP induces acute inflammation and fibrosis. In this study, we investigated the effects of multiple intratracheal administrations of CWAAP on inflammatory responses and pulmonary fibrosis along with inducible bronchus-associated lymphoid tissues (iBALT) formation, which is involved in allergic inflammation. Male F344 rats (190-200 g) received single or multiple intratracheal administrations of phosphate-buffered saline (PBS) or CWAAP. To assess inflammatory responses and pulmonary fibrosis, immunohistochemical and histological staining was performed. CD68, CD163, CD169, TGF-β, and collagen I positive cells/areas in the lungs of the CWAAP-group rats were significantly increased than those in the PBS group. Furthermore, the number of iBALT structures, CD4 + T cells, along with CD19, PAX5, IL-4, GATA-3, T-bet, and IgE-positive cells in the terminal bronchioles and blood vessels of the lungs were significantly increased in the CWAAP group. Moreover, pulmonary fibrosis, iBALT formation, and levels of specific IgG were significantly increased in rats who received multiple intratracheal administrations of CWAAP compared to those with single intratracheal administration. Multiple intratracheal administrations of CWAAP potentiated the classical fibrotic pathway (M2 macrophage-TGF-β-collagen I) more potently than single intratracheal administration. Furthermore, it was possible that iBALT was formed around terminal bronchioles and blood vessels and the number of immune cells was increased, resulting in enhanced allergic inflammation and pulmonary fibrosis.
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Affiliation(s)
- Takamasa Kido
- Department of Public Health and Environmental Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Chiemi Sugaya
- Department of Public Health and Environmental Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Hiroshi Hano
- The Jikei University School of Medicine, Tokyo, Japan
| | | | - Machi Suka
- Department of Public Health and Environmental Medicine, The Jikei University School of Medicine, Tokyo, Japan
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24
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Zhang Z, Lu Y, Zhang H, Dong S, Wu Y, Wang S, Huang A, Jiang Q, Yin S. Enriched environment ameliorates fear memory impairments induced by sleep deprivation via inhibiting PIEZO1/calpain/autophagy signaling pathway in the basal forebrain. CNS Neurosci Ther 2024; 30:e14365. [PMID: 37485782 PMCID: PMC10848088 DOI: 10.1111/cns.14365] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 07/25/2023] Open
Abstract
AIMS To verify the hypothesis that an enriched environment (EE) alleviates sleep deprivation-induced fear memory impairment by modulating the basal forebrain (BF) PIEZO1/calpain/autophagy pathway. METHODS Eight-week-old male mice were housed in a closed, isolated environment (CE) or an EE, before 6-h total sleep deprivation. Changes in fear memory after sleep deprivation were observed using an inhibitory avoidance test. Alterations in BF PIEZO1/calpain/autophagy signaling were detected. The PIEZO1 agonist Yoda1 or inhibitor GsMTx4, the calpain inhibitor PD151746, and the autophagy inducer rapamycin or inhibitor 3-MA were injected into the bilateral BF to investigate the pathways involved in the memory-maintaining role of EE in sleep-deprived mice. RESULTS Mice housed in EE performed better than CE mice in short- and long-term fear memory tests after sleep deprivation. Sleep deprivation resulted in increased PIEZO1 expression, full-length tropomyosin receptor kinase B (TrkB-FL) degradation, and autophagy, as reflected by increased LC3 II/I ratio, enhanced p62 degradation, increased TFEB expression and nuclear translocation, and decreased TFEB phosphorylation. These molecular changes were partially reversed by EE treatment. Microinjection of Yoda1 or rapamycin into the bilateral basal forebrain induced excessive autophagy and eliminated the cognition-protective effects of EE. Bilateral basal forebrain microinjection of GsMTx4, PD151746, or 3-MA mimicked the cognitive protective and autophagy inhibitory effects of EE in sleep-deprived mice. CONCLUSIONS EE combats sleep deprivation-induced fear memory impairments by inhibiting the BF PIEZO1/calpain/autophagy pathway.
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Affiliation(s)
- Zi‐qing Zhang
- The Postgraduate Training Base of Jinzhou Medical University (The PLA Rocket Force Characteristic Medical Center)BeijingChina
- Department of NeurologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Yan Lu
- Department of NeurologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Hao Zhang
- Department of AnesthesiologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Su‐he Dong
- Department of Nuclear Radiation Injury and MonitoringThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Ya‐tong Wu
- The Postgraduate Training Base of Jinzhou Medical University (The PLA Rocket Force Characteristic Medical Center)BeijingChina
- Department of NeurologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Si‐nian Wang
- Department of Nuclear Radiation Injury and MonitoringThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Ai‐hua Huang
- Department of NeurologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Qi‐sheng Jiang
- Department of Nuclear Radiation Injury and MonitoringThe PLA Rocket Force Characteristic Medical CenterBeijingChina
| | - Shi‐min Yin
- The Postgraduate Training Base of Jinzhou Medical University (The PLA Rocket Force Characteristic Medical Center)BeijingChina
- Department of NeurologyThe PLA Rocket Force Characteristic Medical CenterBeijingChina
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25
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Anjana, Rawat S, Goswami S. Synergistic approach for enhanced production of polyhydroxybutyrate by Bacillus pseudomycoides SAS-B1: Effective utilization of glycerol and acrylic acid through fed-batch fermentation and its environmental impact assessment. Int J Biol Macromol 2024; 258:128764. [PMID: 38103666 DOI: 10.1016/j.ijbiomac.2023.128764] [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: 08/01/2023] [Revised: 12/07/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
The continual rise in the consumption of petroleum-based synthetic polymers raised a significant environmental concern. Bacillus pseudomycoides SAS-B1 is a gram-positive rod-shaped halophilic bacterium capable of accumulating Polyhydroxybutyrate (PHB)-an intracellular biodegradable polymer. In the present study, the optimal conditions for cell cultivation in the seed media were developed. The optimal factors included a preservation age of 14 to 21 days (with 105 to 106 cells/mL), inoculum size of 0.1 % (w/v), 1 % (w/v) glucose, and growth temperature of 30 °C. The cells were then cultivated in a two-stage fermentation process utilizing glycerol and Corn Steep Liquor (CSL) as carbon and nitrogen sources, respectively. PHB yield was effectively increased from 2.01 to 9.21 g/L through intermittent feeding of glycerol and CSL, along with acrylic acid. FTIR, TGA, DSC, and XRD characterization studies were employed to enumerate the recovered PHB and determine its physicochemical properties. Additionally, the study assessed the cradle-to-gate Life Cycle Assessment (LCA) of PHB production, considering net CO2 generation and covering all major environmental impact categories. The production of 1000 kg of PHB resulted in lower stratospheric ozone depletion and comparatively reduced carbon dioxide emissions (2022.7 kg CO2 eq.) and terrestrial ecotoxicity (9.54 kg 1,4-DCB eq.) than typical petrochemical polymers.
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Affiliation(s)
- Anjana
- Division of Chemical Engineering, Centre of Innovative and Applied Bioprocessing, Knowledge City, Sector-81, Mohali, Punjab 140306, India; Department of Biotechnology, Regional Center for Biotechnology (RCB), Faridabad, Haryana 121001, India
| | - Shristhi Rawat
- Division of Chemical Engineering, Centre of Innovative and Applied Bioprocessing, Knowledge City, Sector-81, Mohali, Punjab 140306, India
| | - Saswata Goswami
- Division of Chemical Engineering, Centre of Innovative and Applied Bioprocessing, Knowledge City, Sector-81, Mohali, Punjab 140306, India; Department of Biotechnology, Regional Center for Biotechnology (RCB), Faridabad, Haryana 121001, India.
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26
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Bower D, Herbert E, Breedlove KM, Lacy APM, Casa D, Bowman TG. Mechanical characterization of athletic helmet shells. Sports Biomech 2024; 23:241-252. [PMID: 33660587 DOI: 10.1080/14763141.2020.1837926] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/12/2020] [Indexed: 10/22/2022]
Abstract
Our purpose was to compare the mechanical properties of the protective outer shells of various athletic helmets in their final, fully manufactured form. Sections were taken from 3 different helmet shells (Bauer RE-AKT hockey helmet, Cascade R lacrosse helmet, and Riddell Speedflex football helmet) at 4 different locations (front, side, top, and rear) for a total of 12 test specimens. The 4 specimens from each helmet shell were potted together in epoxy resin moulds and mechanically polished. The hardness, elastic modulus and phase angle were measured using dynamic nanoindentation performed at 100 Hz with an oscillation amplitude of 1 nm (rms). Repeated ANOVA analysis was used to compare each of the dependent variables for each of the 3 helmets across the 4 different locations. The interaction between helmet type and location was significant for hardness (F6,63 = 2.84, P = 0.032, Pη2 = 0.21), elastic modulus (F6,63 = 6.412, P < 0.001, Pη2 = 0.38), and phase angle (F6,63 = 7.65, P < 0.001, Pη2 = 0.42). Polycarbonate has a higher ability to dissipate mechanical energy making it the recommended superior choice for helmet shells. In addition, the results lead us to speculate that manufacturing causes changes in the molecular weight or the distribution of fillers across locations for polyethylene but not for polycarbonate since mechanical properties are fairly uniform over the surface of football helmets, at least within a given helmet.
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Affiliation(s)
- Dane Bower
- Department of Athletic Training, University of Lynchburg, Lynchburg, VA, USA
| | - Erik Herbert
- Materials Science and Engineering, Michigan Technological University, Houghton, MI, USA
| | - Katherine M Breedlove
- Center for Clinical Spectroscopy, Brigham and Women's Hospital, Boston, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - Alicia Pike M Lacy
- Department of Interdisciplinary Health Sciences, A.T. Still University, Mesa, AZ, USA
- Korey Stringer Institute, University of Connecticut, Storrs, CT, USA
| | - Douglas Casa
- Korey Stringer Institute, University of Connecticut, Storrs, CT, USA
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
| | - Thomas G Bowman
- Department of Athletic Training, University of Lynchburg, Lynchburg, VA, USA
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27
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Wang B, Wang X, Liu W, Song Z, Wang H, Li G, Yu D, Liu X, Ge S. Using chitosan nanofibers to synergistically construct a highly stretchable multi-functional liquid mental-based hydrogel for assembling strain sensor with high sensitivity and broad working range. Int J Biol Macromol 2024; 259:129225. [PMID: 38184053 DOI: 10.1016/j.ijbiomac.2024.129225] [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: 11/21/2023] [Revised: 12/26/2023] [Accepted: 01/02/2024] [Indexed: 01/08/2024]
Abstract
Liquid metal (LM) microdroplets have garnered significant interest as conductive materials for initiating free radical polymerization in the development of conductive hydrogels suited for strain sensors. However, crafting multi-functional conductive hydrogels that boast both high stretchability and superior sensing capabilities remains as a challenge. In this study, we have successfully synthesized LM-based conductive hydrogels characterized by remarkable stretchability and sensing performance employing acrylic acid (AA) to evenly distribute chitosan nanofibers (CSFs) and to subsequently catalyze the free radical polymerization of AA. The resultant polymer network was crosslinked within situ polyacrylic acid (PAA), facilitated by Ga3+ in conjunction with guar gum (GG)-stabilized Ga droplets. The strategic interplay between the rigid, and protonated CSFs and the pliable PAA matrix, coupled with the ionic crosslinking of Ga3+, endows the resulting GG-Ga-CSF-PAA hydrogel with high stretchability (3700 %), ultrafast self-healing, robust moldability, and strong adhesiveness. When deployed as a strain sensing material, this hydrogel exhibits a high gauge factor (38.8), a minimal detection threshold, enduring durability, and a broad operational range. This versatility enables the hydrogel-based strain sensor to monitor a wide spectrum of human motions. Remarkably, the hydrogel maintains its stretchability and sensing efficacy under extreme temperatures after a simple glycerol solution treatment.
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Affiliation(s)
- Bingyan Wang
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Xueyan Wang
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Wenxia Liu
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China.
| | - Zhaoping Song
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Huili Wang
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Guodong Li
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Dehai Yu
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Xiaona Liu
- State Key Laboratory of Biobased Materials and Green Papermaking, Qilu University of Technology, Shandong academy of science, Jinan 250353, China
| | - Shaohua Ge
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China.
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Zhu K, Li Y, Huan D, Liu H, Li Z, Jin Y, Zhu C. Effect of Novel Compound Redox Initiators on Polymerization Mechanism and Mechanical Properties of Acrylic Resin. Macromol Rapid Commun 2024; 45:e2300579. [PMID: 37984501 DOI: 10.1002/marc.202300579] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/14/2023] [Indexed: 11/22/2023]
Abstract
Aiming at the problems of long reaction time and the risk of explosion polymerization of acrylate resin, a small amount of ferrocene (Fc) is added to the existing dibenzoyl peroxide (BPO)/N,N-dimethylaniline (DMA) initiators, and the compound redox initiators (BPO/DMA/ (Fc)) are proposed for acrylate resin polymerization at room temperature. The effect of the content of Fc in the resin on the reaction efficiency and the molding quality of products is researched, and the initiation mechanism of the compound redox initiators is analyzed. It is found that with the addition of Fc, the reaction time of the resin can be shortened by 68% at maximum, the heat release temperature of the resin can be reduced by 40% at maximum, the molecular weight of the reaction products can be increased by 74% at maximum, the tensile and bending properties of the resin castings are increased by 23% and 35% at maximum, respectively, and the bending strength and bending modulus are increased by 57% and 27% at maximum, respectively. The compound redox initiators proposed in this paper can improve the molding efficiency and quality of the product, lay a foundation for the application of acrylic resin in the field of pultrusion molding, perfusion molding, and other in situ molding of thermoplastic composites.
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Affiliation(s)
- Kang Zhu
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Yong Li
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
- Jiangsu Key Laboratory of Hi-Tech Research of Wind Turbine Design, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Dajun Huan
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Hao Liu
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Ziyi Li
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Yue Jin
- Department of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
| | - Chunling Zhu
- Jiangsu Key Laboratory of Hi-Tech Research of Wind Turbine Design, Nanjing University of Aeronautics and Astronautics, Nanjing, 210001, P. R. China
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江 文, 钟 健, 欧阳 智, 沈 钧, 邱 艳, 曾 烨. [Spatial Constraints of Rectangular Hydrogel Microgrooves Regulate the Morphology and Arrangement of Human Umbilical Vein Endothelial Cells]. Sichuan Da Xue Xue Bao Yi Xue Ban 2024; 55:87-94. [PMID: 38322512 PMCID: PMC10839481 DOI: 10.12182/20240160402] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Indexed: 02/08/2024]
Abstract
Objective To construct microscale rectangular hydrogel grooves and to investigate the morphology and alignment of human umbilical vein endothelial cells (HUVECs) under spatial constraints. Vascular endothelial cell morphology and alignment are important factors in vascular development and the maintenance of homeostasis. Methods A 4-arm polyethylene glycol-acrylate (PEG-acrylate) hydrogel was used to fabricate rectangular microgrooves of the widths of 60 μm, 100 μm, and 140 μm. The sizes and the fibronectin (FN) adhesion of these hydrogel microgrooves were measured. HUVECs were seeded onto the FN-coated microgrooves, while the flat surface without micropatterns was used as the control. After 48 hours of incubation, the morphology and orientation of the cells were examined. The cytoskeleton was labelled with phalloidine and the orientation of the cytoskeleton in the hydrogel microgrooves was observed by laser confocal microscopy. Results The hydrogel microgrooves constructed exhibited uniform and well-defined morphology, a complete structure, and clear edges, with the width deviation being less than 3.5%. The depth differences between the hydrogel microgrooves of different widths were small and the FN adhesion is uniform, providing a micro-patterned growth interface for cells. In the control group, the cells were arranged haphazardly in random orientations and the cell orientation angle was (46.9±1.8)°. In contrast, the cell orientation angle in the hydrogel microgrooves was significantly reduced (P<0.001). However, the cell orientation angles increased with the increase in hydrogel microgroove width. For the 60 μm, 100 μm, and 140 μm hydrogel microgrooves, the cell orientation angles were (16.4±2.8)°, (24.5±3.2)°, and (30.3±3.5)°, respectively. Compared to that of the control group (35.7%), the number of cells with orientation angles <30° increased significantly in the hydrogel microgrooves of different widths (P<0.001). However, as the width of the hydrogel microgrooves increased, the number of cells with orientation angles <30° gradually decreased (79.9%, 62.3%, 54.7%, respectively), while the number of cells with orientation angles between 60°-90° increased (P<0.001). The cell bodies in the microgrooves were smaller and more rounded in shape. The cells were aligned along the direction of the microgrooves and corresponding changes occurred in the arrangement of the cell cytoskeleton. In the control group, cytoskeletal filaments were aligned in random directions, presenting an orientation angle of (45.5±3.7)°. Cytoskeletal filaments were distributed evenly within various orientation angles. However, in the 60 μm, 100 μm, and 140 μm hydrogel microgrooves, the orientation angles of the cytoskeletal filaments were significantly decreased, measuring (14.4±3.1)°, (24.7±3.5)°, and (31.9±3.3)°, respectively. The number of cytoskeletal filaments with orientation angles <30° significantly increased in hydrogel microgrooves of different widths (P<0.001). However, as the width of the hydrogel microgrooves increased, the number of cytoskeletal filaments with orientation angles <30° gradually decreased, while the number of cytoskeletal filaments with orientation angles between 60°-90° gradually increased (P<0.001). Conclusion Hydrogel microgrooves can regulate the morphology and orientation of HUVECs and mimic to a certain extent the in vivo microenvironment of vascular endothelial cells, providing an experimental model that bears better resemblance to human physiology for the study of the unique physiological functions of vascular endothelial cells. Nonetheless, the molecular mechanism of spatial constraints on the morphology and the assembly of vascular endothelial cell needs to be further investigated.
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Affiliation(s)
- 文丽 江
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - 健 钟
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - 智 欧阳
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - 钧怡 沈
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - 艳 邱
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - 烨 曾
- 四川大学华西基础医学与法医学院 生物医学工程研究室 (成都 610041)Institute of Biomedical Engineering, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China
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Zhao Y, Xu J, Zheng Y, Li Q, Huang Y, Zong M, Guo W. Dual Enzymolysis Assisted by Acrylate or Phosphate Grafting: Influences on the Structural and Functional Properties of Jujube Residue Dietary Fiber. Molecules 2024; 29:478. [PMID: 38257389 PMCID: PMC10819664 DOI: 10.3390/molecules29020478] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/06/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024] Open
Abstract
Jujube residue is an abundant and low-cost dietary fiber resource, but its relatively lower hydration and functional properties limit its utilization as an ingredient of functional food. Thus, cellulase and hemicellulase hydrolysis, enzymatic hydrolysis assisted by phosphate grafting (EPG), and enzymatic hydrolysis assisted by acrylate grafting (EAG) were used to improve the functional properties of jujube residue dietary fiber (JRDF) in this study. The results evidenced that these modifications all increased the porosity of the microstructure of JRDF and increased the soluble fiber content, surface area, and hydration properties, but reduced its brightness (p < 0.05). Moreover, JRDF modified by enzymolysis combined with acrylate grafting offered the highest extractable polyphenol content, oil, sodium cholate, and nitrite ion sorption abilities. Meanwhile, JRDF modified via enzymolysis assisted by phosphate grafting showed the highest soluble fiber content (23.53 g∙100 g-1), water-retention ability (12.84 g∙g-1), viscosity (9.37 cP), water-swelling volume (10.80 mL∙g-1), and sorption ability of copper (II) and lead (II) ions. Alternatively, JRDF modified with cellulase hydrolysis alone exhibited the highest glucose adsorption capacity (21.9 g∙100 g-1) at pH 7.0. These results indicate that EPG is an effective way to improve the hypolipidemic effects of JRDF, while EAG is a good choice to enhance its hydration and hypoglycemic properties.
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Affiliation(s)
| | - Jianguo Xu
- Food Science College, Shanxi Normal University, Taiyuan 030619, China; (Y.Z.); (Q.L.); (Y.H.); (M.Z.); (W.G.)
| | - Yajun Zheng
- Food Science College, Shanxi Normal University, Taiyuan 030619, China; (Y.Z.); (Q.L.); (Y.H.); (M.Z.); (W.G.)
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Staehle HJ, Sekundo C. 75 Years Ago: Discovery of Resin Adhesion to Acid-etched Enamel - A Comparison of the 1949 and 1955 Methods. J Adhes Dent 2024; 26:87-92. [PMID: 38465403 DOI: 10.3290/j.jad.b5057135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
PURPOSE This paper describes previously unknown details about the discovery of resin adhesion to acid-etched human enamel. MATERIALS AND METHODS A literature review was performed through manual assessments. Primary sources revealing the discovery of resin curing on etched enamel were analyzed considering the research objectives and methodological procedure during that era, including the type of teeth used, preparatory measures, acid-etching process, type of resin and its application, and follow-up observations. Additionally, the political and economic contexts were examined. RESULTS In 1949, acid etching was found to promote adhesion with acrylic resin, a finding described again in 1955. The 1949 studies utilized nitric acid for enamel etching and the acrylate resin Paladon from the Kulzer company (Germany). Conversely, the 1955 investigations employed phosphoric acid and an unnamed acrylate, likely a self-curing resin supported by Kulzer in the late 1930s. Disparities in the 1949 and 1955 findings can be ascribed to varying objectives and test conditions amidst a turbulent political backdrop, significantly impacting the Kulzer company. CONCLUSION The discovery of resin adhesion to acid-etched enamel, approaching its 75th anniversary in 2024, is a landmark in 20th-century adhesive dentistry. Paladon represents a pioneering compound, exemplifying the influence of political, ideological, and economic factors on scientific advancements during that period.
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Cramer K, Reinhardt SCM, Auer A, Shin JY, Jungmann R. Comparing divisome organization between vegetative and sporulating Bacillus subtilis at the nanoscale using DNA-PAINT. Sci Adv 2024; 10:eadk5847. [PMID: 38198550 PMCID: PMC10780868 DOI: 10.1126/sciadv.adk5847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024]
Abstract
Spore-forming bacteria have two distinct division modes: sporulation and vegetative division. The placement of the foundational division machinery component (Z-ring) within the division plane is contingent on the division mode. However, investigating if and how division is performed differently between sporulating and vegetative cells remains challenging, particularly at the nanoscale. Here, we use DNA-PAINT super-resolution microscopy to compare the 3D assembly and distribution patterns of key division proteins SepF, ZapA, DivIVA, and FtsZ. We determine that ZapA and SepF placement within the division plane mimics that of the Z-ring in vegetative and sporulating cells. We find that DivIVA assemblies differ between vegetative and sporulating cells. Furthermore, we reveal that SepF assembles into ~50-nm arcs independent of division mode. We propose a nanoscale model in which symmetric or asymmetric placement of the Z-ring and early divisome proteins is a defining characteristic of vegetative or sporulating cells, respectively, and regulation of septal thickness differs between division modes.
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Affiliation(s)
- Kimberly Cramer
- Faculty of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Susanne C. M. Reinhardt
- Faculty of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Alexander Auer
- Faculty of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Jae Yen Shin
- Faculty of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
| | - Ralf Jungmann
- Faculty of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
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Dengxiao Z, Hongbin J, Wenjing Z, Qingsong Y, Zhihang M, Haizhong W, Wei R, Shiliang L, Daichang W. Combined biochar and water-retaining agent application increased soil water retention capacity and maize seedling drought resistance in Fluvisols. Sci Total Environ 2024; 907:167885. [PMID: 37863232 DOI: 10.1016/j.scitotenv.2023.167885] [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: 07/19/2023] [Revised: 10/07/2023] [Accepted: 10/14/2023] [Indexed: 10/22/2023]
Abstract
Global climate change has accelerated the occurrence of agricultural drought events, which threaten food security. Therefore, improvements in the soil water retention capacity (WRC) and crop drought resistance are crucial for promoting the sustainability of the agricultural environment. In this study, we explored the effects of applying biochar and water-retaining agent (WRA) on soil WRC and crop drought resistance in a Fluvisols, along with their potential mechanisms. We applied two types of biochar (based on wheat and maize straw) and two WRAs (polyacrylamide and starch-grafted sodium acrylate) to Fluvisols with different textures, and then evaluated soil water retention and crop drought physiological resistance. The combined biochar and WRA treatment increased the WRC in both the sandy loam and clay loam Fluvisols. Biochar and WRA increased the relative content of soil hydrophilic functional groups. Compared with the control (CK), the combined application of biochar and WRA increased the field capacity, reduced soil water volatilization under drought conditions, and slowed water infiltration into the Fluvisols. The soil WRC was higher with the wheat straw biochar (WBC) treatment than with the maize straw biochar (MBC) treatment. It was also higher with polyacrylamide treatment than with the starch-grafted sodium acrylate treatment. The combined application of biochar and WRA improved crop drought physiological resistance by significantly increasing the maize seedling potassium (K) and soluble sugar contents, increasing antioxidant enzyme activity, and reducing the malondialdehyde (MDA) content. The results indicate that the application of biochar and WRA alleviated drought stress by increasing the soil WRC and improving crop drought resistance in Fluvisols.
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Affiliation(s)
- Zhang Dengxiao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Jie Hongbin
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhang Wenjing
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Yuan Qingsong
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Ma Zhihang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Wu Haizhong
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Rao Wei
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Liu Shiliang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Wang Daichang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China.
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Ponomar M, Ruleva V, Sarapulova V, Pismenskaya N, Nikonenko V, Maryasevskaya A, Anokhin D, Ivanov D, Sharma J, Kulshrestha V, Améduri B. Structural Characterization and Physicochemical Properties of Functionally Porous Proton-Exchange Membrane Based on PVDF-SPA Graft Copolymers. Int J Mol Sci 2024; 25:598. [PMID: 38203772 PMCID: PMC10779367 DOI: 10.3390/ijms25010598] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/08/2023] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
Fluorinated proton-exchange membranes (PEMs) based on graft copolymers of dehydrofluorinated polyvinylidene fluoride (D-PVDF), 3-sulfopropyl acrylate (SPA), and 1H, 1H, 2H-perfluoro-1-hexene (PFH) were prepared via free radical copolymerization and characterized for fuel cell application. The membrane morphology and physical properties were studied via small-(SAXS) and wide-angle X-ray scattering (WAXS), SEM, and DSC. It was found that the crystallinity degree is 17% for PEM-RCF (co-polymer with SPA) and 16% for PEM-RCF-2 (copolymer with SPA and PFH). The designed membranes possess crystallite grains of 5-6 nm in diameter. SEM images reveal a structure with open pores on the surface of diameters from 20 to 140 nm. Their transport and electrochemical characterization shows that the lowest membrane area resistance (0.9 Ωcm2) is comparable to perfluorosulfonic acid PEMs (such as Nafion®) and polyvinylidene fluoride (PVDF) based CJMC cation-exchange membranes (ChemJoy Polymer Materials, China). Key transport and physicochemical properties of new and commercial membranes were compared. The PEM-RCF permeability to NaCl diffusion is rather high, which is due to a relatively low concentration of fixed sulfonate groups. Voltammetry confers that the electrochemical behavior of new PEM correlates to that of commercial cation-exchange membranes, while the ionic conductivity reveals an impact of the extended pores, as in track-etched membranes.
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Affiliation(s)
- Maria Ponomar
- Department of Physical Chemistry, Kuban State University, 350040 Krasnodar, Russia
| | - Valentina Ruleva
- Department of Physical Chemistry, Kuban State University, 350040 Krasnodar, Russia
| | - Veronika Sarapulova
- Department of Physical Chemistry, Kuban State University, 350040 Krasnodar, Russia
| | - Natalia Pismenskaya
- Department of Physical Chemistry, Kuban State University, 350040 Krasnodar, Russia
| | - Victor Nikonenko
- Department of Physical Chemistry, Kuban State University, 350040 Krasnodar, Russia
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia (B.A.)
| | - Alina Maryasevskaya
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia (B.A.)
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry Russian Academy of Sciences, 142432 Chernogolovka, Russia
| | - Denis Anokhin
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia (B.A.)
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry Russian Academy of Sciences, 142432 Chernogolovka, Russia
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Dimitri Ivanov
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia (B.A.)
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry Russian Academy of Sciences, 142432 Chernogolovka, Russia
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, 68057 Mulhouse, France
| | - Jeet Sharma
- Institute Charles Gerhardt, CNRS, University of Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, 34000 Montpellier, France;
- Membrane Science and Separation Technology Division, Council of Scientific and Industrial Research, Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Vaibhav Kulshrestha
- Membrane Science and Separation Technology Division, Council of Scientific and Industrial Research, Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bruno Améduri
- Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia (B.A.)
- Institute Charles Gerhardt, CNRS, University of Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, 34000 Montpellier, France;
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Wang F, Sun Q, Li Y, Xu R, Li R, Wu D, Huang R, Yang Z, Li Y. Hydrogel Encapsulating Wormwood Essential Oil with Broad-spectrum Antibacterial and Immunomodulatory Properties for Infected Diabetic Wound Healing. Adv Sci (Weinh) 2024; 11:e2305078. [PMID: 38030556 PMCID: PMC10797468 DOI: 10.1002/advs.202305078] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/29/2023] [Indexed: 12/01/2023]
Abstract
The integration of hydrogels with bio-friendly functional components through simple and efficient strategies to construct wound dressings with broad-spectrum antibacterial and immunomodulatory properties to promote the healing of infected diabetic wounds is highly desirable but remains a major challenge. Here, wormwood essential oil (WEO) is effectively encapsulated in the hydrogel via an O/W-Pickering emulsion during the polymerization of methacrylic anhydride gelatin (GelMA), acrylamide (AM), and acrylic acid N-hydroxysuccinimide ester (AAc-NHS) to form a multifunctional hydrogel dressing (HD-WEO). Compared with conventional emulsions, Pickering emulsions not only improve the encapsulation stability of the WEO, but also enhance the tensile and swelling properties of hydrogel. The synergistic interaction of WEO's diverse bioactive components provides a broad-spectrum antibacterial activity against S. aureus, E. coli, and MRSA. In addition, the HD-WEO can induce the polarization of macrophages from M1 to M2 phenotype. With these advantages, the broad-spectrum antibacterial and immunomodulatory HD-WEO effectively promotes the collagen deposition and neovascularization, thereby accelerating the healing of MRSA-infected diabetic wounds.
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Affiliation(s)
- Feng Wang
- Guangdong Cardiovascular InstituteGuangdong Provincial People's HospitalGuangdong Academy of Medical SciencesGuangzhou510080China
- Department of Gastrointestinal SurgeryDepartment of General SurgeryGuangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China
- Key Laboratory of Biowaste Resources for Selenium‐Enriched Functional Utilization, College of Petroleum and Chemical EngineeringBeibu Gulf UniversityQinzhou535011China
| | - Qi Sun
- School of MedicineSouth China University of TechnologyGuangzhou510006China
| | - Yang Li
- Guangdong Cardiovascular InstituteGuangdong Provincial People's HospitalGuangdong Academy of Medical SciencesGuangzhou510080China
- Department of Gastrointestinal SurgeryDepartment of General SurgeryGuangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China
- School of MedicineSouth China University of TechnologyGuangzhou510006China
| | - Ruijun Xu
- School of MedicineSouth China University of TechnologyGuangzhou510006China
| | - Renjie Li
- Guangdong Cardiovascular InstituteGuangdong Provincial People's HospitalGuangdong Academy of Medical SciencesGuangzhou510080China
- Department of Gastrointestinal SurgeryDepartment of General SurgeryGuangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China
| | - Dingcai Wu
- PCFM LabSchool of ChemistrySun Yat‐sen UniversityGuangzhou510006China
- The Eighth Affiliated HospitalSun Yat‐sen UniversityShenzhen518033China
| | - Rongkang Huang
- Department of General Surgery (Colorectal Surgery)Guangdong Institute of GastroenterologyBiomedical Innovation CenterGuangdong Provincial Key Laboratory of Colorectal and Pelvic Floor DiseasesThe Sixth Affiliated HospitalSun Yat‐sen UniversityGuangzhou510655China
| | - Zifeng Yang
- Department of Gastrointestinal SurgeryDepartment of General SurgeryGuangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China
| | - Yong Li
- Department of Gastrointestinal SurgeryDepartment of General SurgeryGuangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China
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Kumar D, Pal RR, Das N, Roy P, Saraf SA, Bayram S, Kundu PP. Synthesis of flaxseed gum/melanin-based scaffold: A novel approach for nano-encapsulation of doxorubicin with enhanced anticancer activity. Int J Biol Macromol 2024; 256:127964. [PMID: 37951423 DOI: 10.1016/j.ijbiomac.2023.127964] [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: 08/02/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
Doxorubicin is a powerful chemotherapy medicine that is frequently used to treat cancer, but because of its extremely destructive side effects on other healthy cells, its applications have been severely constrained. With the aim of using lower therapeutic doses of doxorubicin while maintaining the same anti-cancerous activity as those of higher doses, the present study designs nano-encapsulation of doxorubicin by acrylamide grafted melanin as core and acrylic acid grafted flax seed gum as shell (DOX@AAM-g-ML/AA-g-FSG-NPs) for studies in-vivo and in-vitro anticancer activity. For biological studies, the cytotoxicity of DOX@AAM-g-ML/AA-g-FSG-NPs was examined on a cancerous human cell line (HCT-15) and it was observed that DOX@AAM-g-ML/AA-g-FSG-NPs exhibited very high toxicity towards HCT-15. In-vivo investigation in colon cancer-inflicted rat model also showed that DOX@AAM-g-ML/AA-g-FSG-NPs showed better anticancer activity against cancerous cells as compared to free doxorubicin. The drug release behavior of DOX@GML-GFS-NPs was studied at several pH and maximum drug release (95 %) was recorded at pH -7.2, and kinetic data of drug release was follows the Higuchi (R2 = 0.9706) kinetic model. Our study is focussed on reducing the side effects of doxorubicin by its nano-encapsulation in acrylamide grafted melanin as core and acrylic acid grafted flax seed gum that will also enhance its efficiency.
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Affiliation(s)
- Deepak Kumar
- Department of Chemistry, Constituent Government College Richha, Baheri, MJP Rohilkhand University Bareilly (UP), Baheri 243006, India
| | - Ravi Raj Pal
- Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, U.P. 226025, India
| | - Neeladri Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, India
| | - Partha Roy
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, India
| | - Shubhini A Saraf
- Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, U.P. 226025, India
| | - Sinan Bayram
- Department of Medical Services and Techniques, Vocational School of Health Services, Bayburt University, 69000, Bayburt, Turkey.
| | - Patit P Kundu
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, India.
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Hayakawa M, Baba Y, Kouno M. Allergic Contact Stomatitis Caused by (Meth) acrylates in a Gingival Protection Product Used During Teeth Whitening. Dermatitis 2024; 35:96-98. [PMID: 37615620 DOI: 10.1089/derm.2023.0180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- Michitaro Hayakawa
- From the Department of Dermatology, Tokyo Dental College, Ichikawa General Hospital, Ichikawa, Japan
| | - Yuko Baba
- From the Department of Dermatology, Tokyo Dental College, Ichikawa General Hospital, Ichikawa, Japan
| | - Michiyoshi Kouno
- From the Department of Dermatology, Tokyo Dental College, Ichikawa General Hospital, Ichikawa, Japan
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Graham K, Houston R. Evaluation of chloroplast DNA barcoding markers to individualize Papaver somniferum for forensic intelligence purposes. Int J Legal Med 2024; 138:267-275. [PMID: 35788906 DOI: 10.1007/s00414-022-02862-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 03/05/2022] [Accepted: 06/24/2022] [Indexed: 10/17/2022]
Abstract
The opium poppy, Papaver somniferum L., is a forensically important plant due to the medicinal and illegal uses for the milky latex stored in the pods. This latex contains the alkaloids morphine, codeine, and thebaine that are used for their analgesic properties and/or for synthesizing other opioids. However, these compounds are highly addictive and have caused a national opioid epidemic. Two other Papaver species, P. setigerum DC. and P. bracteatum Lindl., are also of forensic interest because they pose both forensic and legal issues. They are largely uncontrolled under the Controlled Substances Act, making these species a common defense strategy. Current morphological and chemical identification methods have been moderately successful but have drawbacks. There is also a lack of sequencing data available. Therefore, exploiting the genome using chloroplast DNA barcoding markers could help to accurately identify these species of interest when plant material is taken. This study screened and assessed the genetic variation both between species and within populations of P. somniferum in nine cpDNA barcode regions (ndhF-rpl32, petA-psbJ, rpl32-trnL, rps16-trnQ, trnE-trnT, trnH-psbA, trnL-trnF, rpl16 intron, and psbE-petL). Published reference genomes from the NCBI GenBank database were aligned and compared for an initial in silico screening. Additionally, ten P. somniferum seed samples from various vendors were sequenced and compared across samples and to published reference data at the various barcode regions of interest. This study showed that the regions trnH-psbA and petA-psbJ have promise for utility in individualization for both inter- and intra-species individualization of P. somniferum.
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Affiliation(s)
- Kari Graham
- Department of Forensic Science, Sam Houston State University, 1003 Bowers Blvd, Huntsville, TX, 77340, USA
| | - Rachel Houston
- Department of Forensic Science, Sam Houston State University, 1003 Bowers Blvd, Huntsville, TX, 77340, USA.
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Yu L, Xie M, Chen M, Yang H, Chen L, Xing P, Tian Z, Wang C. An ortho-activation strategy to develop NIR fluorescent probe for rapid imaging of biothiols in vivo. Talanta 2024; 266:125110. [PMID: 37633039 DOI: 10.1016/j.talanta.2023.125110] [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: 05/13/2023] [Revised: 08/09/2023] [Accepted: 08/22/2023] [Indexed: 08/28/2023]
Abstract
Biothiols are the main antioxidants in regulating the redox balance and resisting oxidative stress in various biological processes, but the long detection time of current fluorescent probes hinders their rapid imaging in vitro and in vivo. To reveal the influx of biothiols, we rationally develop an ortho-activation approach to accelerate the reaction between the probe and biothiols, by introducing electron-withdrawing fluorine atom into the ortho-site of the phenolic hydroxyl group in the NIR probe to generate an ortho-inductive effect. The ortho-fluorine helps to increase the chemical reactivity of the molecular structure, resulting in a significantly shorter detection time (within 5 min) as compared to previous reports (> 20 min for acrylates-based probes in aqueous solution). Based on this approach, our near-infrared probe 2F-RBX can sensitively and efficiently detect endogenous biothiols in living HepG2 cells and in vivo. These data suggest that ortho-activation is a simple and flexible approach to construct sensitive fluorescent probes for rapid imaging of biothiols, and perhaps other molecules in future, under biological circumstances.
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Affiliation(s)
- Lu Yu
- School of Pharmacy, Henan University, Kaifeng, 475004, China
| | - Mingli Xie
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China
| | - Min Chen
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China
| | - Huiru Yang
- School of Pharmacy, Henan University, Kaifeng, 475004, China
| | - Liang Chen
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China
| | - Panfei Xing
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
| | - Zhiyong Tian
- School of Pharmacy, Henan University, Kaifeng, 475004, China.
| | - Chaojie Wang
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, 475004, China.
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Adouvi G, Nawa F, Ballarotto M, Rüger LA, Knümann L, Kasch T, Arifi S, Schubert-Zsilavecz M, Willems S, Marschner JA, Pabel J, Merk D. Structural Fusion of Natural and Synthetic Ligand Features Boosts RXR Agonist Potency. J Med Chem 2023; 66:16762-16771. [PMID: 38064686 DOI: 10.1021/acs.jmedchem.3c01435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
The retinoid X receptors (RXRs) are ligand-activated transcription factors involved in, for example, differentiation and apoptosis regulation. Currently used reference RXR agonists suffer from insufficient specificity and poor physicochemical properties, and improved tools are needed to capture the unexplored therapeutic potential of RXR. Endogenous vitamin A-derived RXR ligands and the natural product RXR agonist valerenic acid comprise acrylic acid residues with varying substitution patterns to engage the critical ionic contact with the binding site arginine. To mimic and exploit this natural ligand motif, we probed its structural fusion with synthetic RXR modulator scaffolds, which had profound effects on agonist activity and remarkably boosted potency of an oxaprozin-derived RXR agonist chemotype. Bioisosteric replacement of the acrylic acid to overcome its pan-assay interference compounds (PAINS) character enabled the development of a highly optimized RXR agonist chemical probe.
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Affiliation(s)
- Gustave Adouvi
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, 60438 Frankfurt, Germany
| | - Felix Nawa
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Marco Ballarotto
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Lorena Andrea Rüger
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, 60438 Frankfurt, Germany
| | - Loris Knümann
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Till Kasch
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Silvia Arifi
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, 60438 Frankfurt, Germany
| | | | - Sabine Willems
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Julian A Marschner
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Jörg Pabel
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Daniel Merk
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, 60438 Frankfurt, Germany
- Department of Pharmacy, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
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Pozzobon V, Otaola F, Arnoudts C, Lagirarde J. Impact of 3D printing materials on mircoalga Chlorella vulgaris. Bioresource Technology 2023; 389:129807. [PMID: 37778670 DOI: 10.1016/j.biortech.2023.129807] [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: 09/07/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/03/2023]
Abstract
3D printing represents a key enabling technology in designing photobioreactors. It allows rapid prototyping of complex geometries at an affordable price. Yet, no study dealt with the biocompatibility of 3D printing material with microalgae. Thus microalga Chlorella vulgaris was cultivated in contact with different 3D printing materials (Acrylonitrile Butadiene Styren - ABS, PolyCarbonate Blend - PC-Blend, PolyLactic acid - PLA, and acrylate methacrylate resin). Cell status was analyzed using flow cytometry, fluorometry, and pigment profiling. Results revealed that acrylate methacrylate resin material inhibits growth, a constant rise in intracellular reactive oxygen species, and a decrease in photosynthetic apparatus functioning. On the contrary, ABS, PC-Blend, and PLA led to nominal perfromances. Nevertheless, PLA was the only material that did not induce an early onset of intracellular reactive oxygen species. Therefore, resin can be ruled out as photobioreactor material, ABS and PC-Blend could be used after a curation period, and PLA induces no detectable perturbations by the means used in this study.
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Affiliation(s)
- Victor Pozzobon
- Université Paris-Saclay, CentraleSupélec, Laboratoire de Génie des Procédés et Matériaux, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), 3 rue des Rouges Terres 51110 Pomacle, France.
| | - Franco Otaola
- Université Paris-Saclay, CentraleSupélec, Laboratoire de Génie des Procédés et Matériaux, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), 3 rue des Rouges Terres 51110 Pomacle, France
| | - Clarisse Arnoudts
- Université Paris-Saclay, CentraleSupélec, Laboratoire de Génie des Procédés et Matériaux, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), 3 rue des Rouges Terres 51110 Pomacle, France
| | - Jules Lagirarde
- Université Paris-Saclay, CentraleSupélec, Laboratoire de Génie des Procédés et Matériaux, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), 3 rue des Rouges Terres 51110 Pomacle, France
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de Groot AC, Rustemeyer T. 2-Hydroxyethyl methacrylate (HEMA): A clinical review of contact allergy and allergic contact dermatitis-Part 1. Introduction, epidemiology, case series and case reports. Contact Dermatitis 2023; 89:401-433. [PMID: 37752620 DOI: 10.1111/cod.14405] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 07/18/2023] [Revised: 07/31/2023] [Accepted: 08/04/2023] [Indexed: 09/28/2023]
Abstract
2-Hydroxyethyl methacrylate (HEMA) has been increasingly recognised as a contact allergen and was added to the European baseline series in 2019. In this article (2 parts), the results of an extensive literature review of the clinical aspects of contact allergy/allergic contact dermatitis to HEMA are presented. In part 1, the epidemiology of HEMA contact allergy is discussed and detailed information on published case series and case reports presented. HEMA is an important cause of contact allergy/allergic contact dermatitis in North America and Europe with recent prevalences of >3% in the USA + Canada and 1.5%-3.7% in Europe. Currently, most cases are caused by nail cosmetics, both in consumers and professional nail stylists. In our literature review, we have found 24 studies presenting case series of patients with allergic contact dermatitis attributed to HEMA and 168 case reports. However, the presence of HEMA in the products causing ACD was established in only a minority. Part 2 will discuss cross- and co-sensitisation, and other skin reactions to HEMA, will assess whether HEMA is the most frequent (meth)acrylate allergen and how sensitive HEMA as a screening agent is, investigate the presence of HEMA in commercial products and provide practical information on patch testing procedures.
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Affiliation(s)
| | - Thomas Rustemeyer
- Dermato-Allergology and Occupational Dermatology, Amsterdam University Medical Centers, Amsterdam, AZ, The Netherlands
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Peplau S, Neubert TJ, Balasubramanian K, Polleux J, Börner HG. Statistical Copolymers that Mimic Aspects of Mussel Adhesive Proteins: Access to Robust Adhesive-Domains for Non-Covalent Surface PEGylation. Macromol Rapid Commun 2023; 44:e2300300. [PMID: 37657944 DOI: 10.1002/marc.202300300] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 08/24/2023] [Indexed: 09/03/2023]
Abstract
Reconstructing functional sequence motifs of proteins, using statistical copolymers greatly reduces the information content, but simplifies synthesis significantly. Key amino acid residues involved in the adhesion of mussel foot proteins are identified. The side-chain functionalities of Dopa, lysine, and arginine are abstracted and incorporated into acrylate monomers to allow controlled radical polymerization. The resulting Dopa-acrylate (Y*-acr), arginine-acrylate (R-acr), and lysine-acrylate (K-acr) monomers are polymerized in different monomer ratios and compositions by reversible addition fragmentation transfer polymerization with a poly(ethylene glycol) (PEG) macrochain transfer agent. This results in two sets of PEG-block-copolymers with statistical mixtures and different monomer ratios of catechol/primary amine and catechol/guanidine side-chain functionalities, both important pairs for mimicking π-cation interactions. The coating behavior of these PEG-block-copolymers is evaluated using quartz crystal microbalance with dissipation energy monitoring (QCM-D), leading to non-covalent PEGylation of the substrates with clear compositional optima in the coating stability and antifouling properties. The coatings prevent non-reversible albumin or serum adsorption, as well as reduce cellular adhesion and fungal spore attachment.
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Affiliation(s)
- Stefan Peplau
- Department of Chemistry, Laboratory for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
| | - Tilmann J Neubert
- Department of Chemistry, Laboratory for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
- Department of Chemistry, Micro & Nano Analytical Sciences, School of Analytical Sciences Adlershof (SALSA) and IRIS Adlershof, Humboldt-Universität zu Berlin, Albert-Einstein-Str. 5-9, 12489, Berlin, Germany
| | - Kannan Balasubramanian
- Department of Chemistry, Micro & Nano Analytical Sciences, School of Analytical Sciences Adlershof (SALSA) and IRIS Adlershof, Humboldt-Universität zu Berlin, Albert-Einstein-Str. 5-9, 12489, Berlin, Germany
| | - Julien Polleux
- Research & Innovation Unit, Department of Ophthalmic Optics, Health University of Applied Sciences Tyrol, Innrain 98, Innsbruck, 6020, Austria
| | - Hans G Börner
- Department of Chemistry, Laboratory for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
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Aadinath W, Muthuvijayan V. Antibacterial and angiogenic potential of iron oxide nanoparticles-stabilized acrylate-based scaffolds for bone tissue engineering applications. Colloids Surf B Biointerfaces 2023; 231:113572. [PMID: 37797467 DOI: 10.1016/j.colsurfb.2023.113572] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 08/23/2023] [Revised: 09/25/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023]
Abstract
Pickering emulsion polymerization, stabilized by inorganic nanoparticles such as iron oxide nanoparticles (IONPs), can be used to fabricate scaffolds with the desired porosity and pore size. These nanoparticles create stable emulsions that can be processed under harsh polymerization conditions. IONPs, apart from serving as an emulsifier, impart beneficial bioactivities such as antibacterial and pro-angiogenic activity. Here, we coated IONPs with three different weights of oleic acid (5.0 g, 7.5 g, and 10.0 g) to synthesize oleic acid-IONPs (OA-IONPs) that possess the desired hydrophobicity (contact angle > 100°). Next, glycidyl methacrylate and trimethylolpropane triacrylate were polymerized using the Pickering emulsion polymerization technique stabilized by the OA-IONPs. The physicochemical properties of the resulting porous scaffolds were thoroughly characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometry (VSM), and a universal testing machine (UTM). The SEM images confirmed the formation of a porous scaffold. The IONPs content, measured using inductively coupled plasma mass spectrometry (ICP-MS), was in the range of 22-26 µg/mg of the scaffold. The mechanical strengths of the scaffolds were in the range of cancellous bone. The degradation profile of the scaffolds varied between 29% and 41% degradation over 30 days. In vitro cytotoxicity studies conducted using the fibroblast (L929) and osteosarcoma (MG-63) cell lines proved that these scaffolds were non-toxic. SEM images showed that the MG-63 cells adhered firmly to the scaffolds and exhibited a well-spread morphology. The antibacterial activity was confirmed by percentage inhibition studies, SEM analysis of bacterial membrane distortion, and reactive oxygen species (ROS) generation in the bacteria. Chick chorioallantoic membrane assay showed that the total vessel length and branch points were significantly increased in the presence of the scaffolds. These results confirm the pro-angiogenic potential of the fabricated scaffolds. The physicochemical, mechanical, and biological properties of the material suggest that the developed scaffolds would be suitable for bone tissue engineering applications.
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Affiliation(s)
- W Aadinath
- Bhupat and Jyoti Mehta School of Biosciences, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Vignesh Muthuvijayan
- Bhupat and Jyoti Mehta School of Biosciences, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India.
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Stoffmonographie für Octocrylen – HBM-Werte für die Metaboliten 2-Cyano-3,3-diphenylacrylsäure (CPAA) und 2-(Carboxymethyl)butyl 2-cyano-3,3-diphenylacrylat (Dinor-OC-Carbonsäure, DOCCA) im Urin der Allgemeinbevölkerung : Stellungnahme der Kommission „Human-Biomonitoring“ des Umweltbundesamtes. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2023; 66:1304-14. [PMID: 37917172 DOI: 10.1007/s00103-023-03785-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
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Kittel Y, Guerzoni LPB, Itzin C, Rommel D, Mork M, Bastard C, Häßel B, Omidinia-Anarkoli A, Centeno SP, Haraszti T, Kim K, Guck J, Kuehne AJC, De Laporte L. Varying the Stiffness and Diffusivity of Rod-Shaped Microgels Independently through Their Molecular Building Blocks. Angew Chem Int Ed Engl 2023; 62:e202309779. [PMID: 37712344 DOI: 10.1002/anie.202309779] [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: 07/11/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/16/2023]
Abstract
Microgels are water-swollen, crosslinked polymers that are widely used as colloidal building blocks in scaffold materials for tissue engineering and regenerative medicine. Microgels can be controlled in their stiffness, degree of swelling, and mesh size depending on their polymer architecture, crosslink density, and fabrication method-all of which influence their function and interaction with the environment. Currently, there is a lack of understanding of how the polymer composition influences the internal structure of soft microgels and how this morphology affects specific biomedical applications. In this report, we systematically vary the architecture and molar mass of polyethylene glycol-acrylate (PEG-Ac) precursors, as well as their concentration and combination, to gain insight in the different parameters that affect the internal structure of rod-shaped microgels. We characterize the mechanical properties and diffusivity, as well as the conversion of acrylate groups during photopolymerization, in both bulk hydrogels and microgels produced from the PEG-Ac precursors. Furthermore, we investigate cell-microgel interaction, and we observe improved cell spreading on microgels with more accessible RGD peptide and with a stiffness in a range of 20 kPa to 50 kPa lead to better cell growth.
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Affiliation(s)
- Yonca Kittel
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
- Institute of Organic and Macromolecular Chemistry, Ulm University, Albert-Einstein Allee 11, 89081, Ulm, Germany
| | - Luis P B Guerzoni
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Carolina Itzin
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Dirk Rommel
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Matthias Mork
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Céline Bastard
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
- Center for Biohybrid Medical Systems (CBMS), Advanced Materials for Biomedicine (AMB), Institute of Applied Medical Engineering (AME), Forckenbeckstraße 55, 52074, Aachen, Germany
| | - Bernhard Häßel
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Abdolrahman Omidinia-Anarkoli
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Silvia P Centeno
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Tamás Haraszti
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
| | - Kyoohyun Kim
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Staudtstraße 2, 91058, Erlangen, Germany
| | - Jochen Guck
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Staudtstraße 2, 91058, Erlangen, Germany
| | - Alexander J C Kuehne
- Institute of Organic and Macromolecular Chemistry, Ulm University, Albert-Einstein Allee 11, 89081, Ulm, Germany
| | - Laura De Laporte
- DWI-Leibniz Institute for Interactive Materials e. V., Forckenbeckstraße 50, 52074, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1-2, 52074, Aachen, Germany
- Center for Biohybrid Medical Systems (CBMS), Advanced Materials for Biomedicine (AMB), Institute of Applied Medical Engineering (AME), Forckenbeckstraße 55, 52074, Aachen, Germany
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Yang Z, Li J, Li S, Zhou J, Cao Z, Li L, Zheng D, Zhao X, Wang W, Deng Y, Fang Y. Real-time monitoring of endogenous cysteine in LPS-induced oxidative stress process with a novel lysosome-targeted fluorescent probe. Anal Chim Acta 2023; 1279:341819. [PMID: 37827641 DOI: 10.1016/j.aca.2023.341819] [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: 08/09/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 10/14/2023]
Abstract
Cysteine (Cys), one of essential small-molecule-based biothiols in the human body, contributes to the regulation of redox reactions and is closely associated with many physiological and pathological metabolic processes. Herein, a novel fluorescent probe, hydroxyphenyl-conjugated benzothiazole (HBT-Cys) capable of detecting Cys was constructed, where acrylate served as the recognition group and hydroxyphenyl-linked benzothiazole acted as the fluorophore. The fluorescence of the probe was negligible in the absence of Cys, and an intense blue fluorescence was observed upon addition of Cys. The Cys-sensing mechanism could be ascribed to the Cys-involved hydrolysis reaction with acrylate, leading to light up the emission at 430 nm with about 80-fold enhancement. In addition, HBT-Cys exhibited a fast response time, remarkable selectivity and low detection limit. HBT-Cys also worked well in real-time monitoring of Cys in three different food samples (wolfberry, hawthorn, and red dates). Importantly, our probe had an excellent lysosomes-targeted ability, which was successfully employed to real-time visualize the fluctuation of both exogenous and endogenous Cys in living cells and zebrafish under lipopolysaccharide (LPS)-induced oxidative stress. Hopefully, the work shown here provides a potent candidate for the real-time tracking of Cys fluctuations in various biological samples.
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Affiliation(s)
- Zhiqiang Yang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jia Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Sining Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jingxi Zhou
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Zhixing Cao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Longxuan Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Dongbin Zheng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xuan Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Wei Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Key Laboratory of Chemical Metrology and Applications on Nutrition and Health for State Market Regulation, Chengdu Institute of Food Inspection, Chengdu, 611130, China
| | - Yun Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Yuyu Fang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Sichuan New Green Pharmaceutical Technology Development Co. Ltd., Chengdu, 611930, China.
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Roquart M, Kharlamova A, Marcos Celada L, Norvez S, Nicolaÿ R, Corté L. PEG-Based Photo-Cross-Linked Networks with Adjustable Topologies and Mechanical Properties. Biomacromolecules 2023; 24:4454-4464. [PMID: 36780702 DOI: 10.1021/acs.biomac.2c01265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We report the synthesis of networks having adjustable topologies and mechanical properties. Our approach consists of photopolymerizing poly(ethylene glycol) diacrylates (PEG-DA) in the presence of mixtures of mono- and multifunctional thiols. We show that the introduction of monothiols as non-cross-linking transfer agents provides a simple way to tune the topology of the networks and produce soft extensible networks. In a systematic study with model short PEG-DA (Mn = 700 g·mol-1), we explored how the gel point and network properties, such as the swelling ratio, the soluble fraction, the viscoelastic moduli, and the ultimate stress and strain, can be adjusted by varying the ratio of thiol to acrylate functions and the average functionality of the thiol mixture. We applied this strategy to longer chains of PEG-DA (Mn = 2300 and 3200 g·mol-1) and varied the viscoelastic and tensile responses of these networks to optimize their adhesive performance. This simple and robust approach further enriches the toolbox of thiol-acrylate polymerization and expands the application scope of PEG-based hydrogels.
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Affiliation(s)
- Maïlie Roquart
- Centre des Matériaux, MINES Paris, CNRS, PSL University, 91003 Evry, France
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Anna Kharlamova
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Lukas Marcos Celada
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Sophie Norvez
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Renaud Nicolaÿ
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Laurent Corté
- Centre des Matériaux, MINES Paris, CNRS, PSL University, 91003 Evry, France
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
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Liu F, Shen C, You F, Zhao W, Deng C, Jiang X. Enhancing the Sound and Thermal Insulation Properties of Polypropylene Foam by Preparing High Melt Strength Polypropylene. Macromol Rapid Commun 2023; 44:e2300344. [PMID: 37552045 DOI: 10.1002/marc.202300344] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/25/2023] [Indexed: 08/09/2023]
Abstract
High-performance polypropylene (PP) foam is a vital polymer product in industrial areas. However, the poor melt strength of ordinary PP homopolymer limits its foaming molding. In this work, high melt strength polypropylene (HMSPP) is prepared by using styrene (St) and tripropylene glycol diacrylate (TPGDA) as comonomers, and then PP foams are prepared by mold foaming method. The results show that adding St in the grafting process of TPGDA will obviously improve the melt strength of the PP matrix, and its melt strength (28 184 Pa.s) is 7.4 times higher than that of pure PP. HMSPP foam has more regular and uniform cells and higher cell density, which significantly improves the sound and thermal insulation properties of PP foam. Compared with pure PP foam, the average sound transmission loss (52.9 dB) of HMSPP foam with a low foaming ratio increased by 64%, and the thermal conductivity (0.0867 W mK-1 ) decreased by 46%. Therefore, the obtained HMSPP foam can be used in sound insulation or thermal insulation area. This work provides an available route for the high-performance utilization of PP foam.
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Affiliation(s)
- Fangjun Liu
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
| | - Chenxi Shen
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
| | - Feng You
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
| | - Wufan Zhao
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
| | - Caoting Deng
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
| | - Xueliang Jiang
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, P. R. China
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Lopez DJ, Alif S, Dharmage S, Lodge CJ, Bui DS, Le Moual N, Waidyatillake NT, Su JC, Abramson M, Walters EH, Hamilton GS, Bowatte G, Erbas B, Benke G, Perret J, Lowe AJ. Exploration of associations between occupational exposures and current adult eczema. Occup Environ Med 2023; 80:564-571. [PMID: 37797979 DOI: 10.1136/oemed-2023-108950] [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: 04/14/2023] [Accepted: 09/15/2023] [Indexed: 10/07/2023]
Abstract
OBJECTIVES There is a scarcity of evidence on occupational exposures that may increase eczema in adults. We aimed to investigate potential associations between occupational exposures and eczema in middle-aged adults. METHODS A lifetime work history calendar was collected from the Tasmanian Longitudinal Health Study participants when they were at age 53. Their work history was collated with the occupational asthma-specific job exposure matrix to define ever-exposure and cumulative exposure unit-years since no eczema job exposure matrix is available. Eczema was determined using the report of flexural rash that was coming and going for at least 6 months in the last 12 months. Skin prick tests were used to further subgroup eczema and atopic eczema (AE) or non-AE (NAE). Logistic and multinomial regression models were used to investigate the associations. RESULTS Eczema prevalence was 9.1%. Current occupational exposure to animals (adjusted OR, aOR=3.06 (95% CI 1.43 to 6.58)), storage mites (aOR=2.96 (95% CI 1.38 to 6.34)) and endotoxin (aOR=1.95 (95% CI 1.04 to 3.64)) were associated with increased risk of current eczema. Furthermore, increased odds of NAE were associated with current exposure to animals (aOR=5.60 (95% CI 1.45 to 21.7)) and storage mites (aOR=5.63 (95% CI 1.45 to 21.9)). Current exposures to isocyanates (aOR=5.27 (95% CI 1.17 to 23.7)) and acrylates (aOR=8.41 (95% CI 1.60 to 44.3)) were associated with AE. There was no evidence of associations between cumulative exposures and eczema prevalence. Cumulative exposure to metalworking fluids (aOR=1.10 (95% CI 1.01 to 1.22)) was associated with NAE and acrylates (aOR=1.24 (95% CI 1.04 to 1.46)) with AE. CONCLUSIONS In this exploratory assessment, multiple occupational exposures were associated with current eczema in middle-aged adults. Raising awareness and limiting these exposures during an individual's productive working life will likely have various health benefits, including reducing eczema prevalence.
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Affiliation(s)
- Diego J Lopez
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Sheikh Alif
- School of Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
- Institute of health and wellbeing, Federation University Australia, Berwick, Victoria, Australia
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Shyamali Dharmage
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Murdoch Children's Research Institute, The University of Melbourne, Melbourne, Victoria, Australia
| | - Caroline J Lodge
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Murdoch Children's Research Institute, The University of Melbourne, Melbourne, Victoria, Australia
| | - Dinh S Bui
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Nicole Le Moual
- Équipe d'Épidémiologie Respiratoire Intégrative, Université Paris-Saclay, Villejuif, France
| | - Nilakshi T Waidyatillake
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - John C Su
- Murdoch Children's Research Institute, The University of Melbourne, Melbourne, Victoria, Australia
- Department of Dermatology, Monash University, Clayton, Victoria, Australia
| | - Michael Abramson
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - E Haydn Walters
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- School of Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Garun S Hamilton
- Monash Lung, Sleep, Allergy and Immunology, Monash Health, Clayton, Victoria, Australia
- School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Gayan Bowatte
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Bircan Erbas
- School of Psychology and Public Health, La Trobe University, Melbourne, Victoria, Australia
| | - Geza Benke
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Jennifer Perret
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Adrian J Lowe
- Allergy and Lung health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Murdoch Children's Research Institute, The University of Melbourne, Melbourne, Victoria, Australia
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