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Phoka T, Thanuthanakhun N, Visitchanakun P, Dueanphen N, Wanichwecharungruang N, Leelahavanichkul A, Palaga T, Ruxrungtham K, Wanichwecharungruang S. Detachable-dissolvable-microneedle as a potent subunit vaccine delivery device that requires no cold-chain. Vaccine X 2023; 15:100398. [PMID: 37920235 PMCID: PMC10618702 DOI: 10.1016/j.jvacx.2023.100398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/07/2023] [Accepted: 10/16/2023] [Indexed: 11/04/2023] Open
Abstract
Although vaccine administration by microneedles has been demonstrated, delivery reliability issues have prevented their implementation. Through an ex vivo porcine skin experiment, we show visual evidence indicating that detachable dissolvable microneedles (DDMN) can deposit cargo into the dermis with insignificant loss of cargo to the stratum corneum. Using ovalbumin (OVA), a model antigen vaccine, as a cargo, the ex vivo experiments yielded a delivery efficiency of 86.08 ± 4.16 %. At room temperature, OVA could be stabilized for up to 35 days in DDMN made from hyaluronic acid and trehalose. The DDMN matrix could improve the denaturation temperature of the OVA from around 70-120 °C to over 150 °C, as demonstrated by differential scanning calorimetric analysis. In vivo delivery of OVA antigen into the mice's skin via DDMN elicited 10 times higher specific antibody responses compared to conventional intramuscular injection. We envision DDMN as an effective, precise dosing, intradermal vaccine delivery system that may require no cold-chain, offers a dose-sparing effect, and can be administered easily.
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Affiliation(s)
- Theerapat Phoka
- Center of Excellence in Materials and Bio-Interfaces, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | | | - Peerapat Visitchanakun
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Thailand
| | - Narintorn Dueanphen
- The Petrochemistry and Polymer Science Program, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | | | - Asada Leelahavanichkul
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Thailand
| | - Tanapat Palaga
- Center of Excellence in Materials and Bio-Interfaces, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Department of Microbiology, Faculty of Science, Chulalongkorn University Bangkok, Thailand
| | - Kiat Ruxrungtham
- Chula Vaccine Research Center (ChulaVRC) and School of Global Health, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Supason Wanichwecharungruang
- Center of Excellence in Materials and Bio-Interfaces, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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Laurent A, Scaletta C, Abdel-Sayed P, Raffoul W, Hirt-Burri N, Applegate LA. Industrial Biotechnology Conservation Processes: Similarities with Natural Long-Term Preservation of Biological Organisms. BIOTECH 2023; 12:biotech12010015. [PMID: 36810442 PMCID: PMC9944097 DOI: 10.3390/biotech12010015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Cryopreservation and lyophilization processes are widely used for conservation purposes in the pharmaceutical, biotechnological, and food industries or in medical transplantation. Such processes deal with extremely low temperatures (e.g., -196 °C) and multiple physical states of water, a universal and essential molecule for many biological lifeforms. This study firstly considers the controlled laboratory/industrial artificial conditions used to favor specific water phase transitions during cellular material cryopreservation and lyophilization under the Swiss progenitor cell transplantation program. Both biotechnological tools are successfully used for the long-term storage of biological samples and products, with reversible quasi-arrest of metabolic activities (e.g., cryogenic storage in liquid nitrogen). Secondly, similarities are outlined between such artificial localized environment modifications and some natural ecological niches known to favor metabolic rate modifications (e.g., cryptobiosis) in biological organisms. Specifically, examples of survival to extreme physical parameters by small multi-cellular animals (e.g., tardigrades) are discussed, opening further considerations about the possibility to reversibly slow or temporarily arrest the metabolic activity rates of defined complex organisms in controlled conditions. Key examples of biological organism adaptation capabilities to extreme environmental parameters finally enabled a discussion about the emergence of early primordial biological lifeforms, from natural biotechnology and evolutionary points of view. Overall, the provided examples/similarities confirm the interest in further transposing natural processes and phenomena to controlled laboratory settings with the ultimate goal of gaining better control and modulation capacities over the metabolic activities of complex biological organisms.
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Affiliation(s)
- Alexis Laurent
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Epalinges, Switzerland
- Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland
- Applied Research Department, LAM Biotechnologies SA, CH-1066 Epalinges, Switzerland
- Manufacturing Department, TEC-PHARMA SA, CH-1038 Bercher, Switzerland
| | - Corinne Scaletta
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Epalinges, Switzerland
| | - Philippe Abdel-Sayed
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Epalinges, Switzerland
- DLL Bioengineering, STI School of Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Wassim Raffoul
- Lausanne Burn Center, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
- Plastic, Reconstructive, and Hand Surgery Service, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
| | - Nathalie Hirt-Burri
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Epalinges, Switzerland
| | - Lee Ann Applegate
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Epalinges, Switzerland
- Faculty of Biology and Medicine, University of Lausanne, CH-1015 Lausanne, Switzerland
- Lausanne Burn Center, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
- Plastic, Reconstructive, and Hand Surgery Service, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
- Center for Applied Biotechnology and Molecular Medicine, University of Zurich, CH-8057 Zurich, Switzerland
- Correspondence: ; Tel.: +41-21-314-35-10
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Laurent A, Porcello A, Fernandez PG, Jeannerat A, Peneveyre C, Abdel-Sayed P, Scaletta C, Hirt-Burri N, Michetti M, de Buys Roessingh A, Raffoul W, Allémann E, Jordan O, Applegate LA. Combination of Hyaluronan and Lyophilized Progenitor Cell Derivatives: Stabilization of Functional Hydrogel Products for Therapeutic Management of Tendinous Tissue Disorders. Pharmaceutics 2021; 13:2196. [PMID: 34959477 PMCID: PMC8706504 DOI: 10.3390/pharmaceutics13122196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 01/10/2023] Open
Abstract
Cultured progenitor cells and derivatives have been used in various homologous applications of cutaneous and musculoskeletal regenerative medicine. Active pharmaceutical ingredients (API) in the form of progenitor cell derivatives such as lysates and lyophilizates were shown to retain function in controlled cellular models of wound repair. On the other hand, hyaluronan-based hydrogels are widely used as functional vehicles in therapeutic products for tendon tissue disorders. The aim of this study was the experimental characterization of formulations containing progenitor tenocyte-derived APIs and hyaluronan, for the assessment of ingredient compatibility and stability in view of eventual therapeutic applications in tendinopathies. Lyophilized APIs were determined to contain relatively low quantities of proteins and growth factors, while being physicochemically stable and possessing significant intrinsic antioxidant properties. Physical and rheological quantifications of the combination formulas were performed after hydrogen peroxide challenge, outlining significantly improved evolutive viscoelasticity values in accelerated degradation settings. Thus, potent effects of physicochemical protection or stability enhancement of hyaluronan by the incorporated APIs were observed. Finally, combination formulas were found to be easily injectable into ex vivo tendon tissues, confirming their compatibility with further translational clinical approaches. Overall, this study provides the technical bases for the development of progenitor tenocyte derivative-based injectable therapeutic products or devices, to potentially be applied in tendinous tissue disorders.
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Affiliation(s)
- Alexis Laurent
- Applied Research Department, LAM Biotechnologies SA, CH-1066 Épalinges, Switzerland; (A.J.); (C.P.)
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
- Manufacturing Department, TEC-PHARMA SA, CH-1038 Bercher, Switzerland
| | - Alexandre Porcello
- School of Pharmaceutical Sciences, University of Geneva, CH-1206 Geneva, Switzerland; (A.P.); (P.G.F.); (E.A.); (O.J.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CH-1206 Geneva, Switzerland
| | - Paula Gonzalez Fernandez
- School of Pharmaceutical Sciences, University of Geneva, CH-1206 Geneva, Switzerland; (A.P.); (P.G.F.); (E.A.); (O.J.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CH-1206 Geneva, Switzerland
| | - Annick Jeannerat
- Applied Research Department, LAM Biotechnologies SA, CH-1066 Épalinges, Switzerland; (A.J.); (C.P.)
| | - Cédric Peneveyre
- Applied Research Department, LAM Biotechnologies SA, CH-1066 Épalinges, Switzerland; (A.J.); (C.P.)
| | - Philippe Abdel-Sayed
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
- DLL Bioengineering, Discovery Learning Program, STI School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Corinne Scaletta
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
| | - Nathalie Hirt-Burri
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
| | - Murielle Michetti
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
| | - Anthony de Buys Roessingh
- Children and Adolescent Surgery Service, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland;
- Lausanne Burn Center, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland;
| | - Wassim Raffoul
- Lausanne Burn Center, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland;
- Plastic, Reconstructive, and Hand Surgery Service, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
| | - Eric Allémann
- School of Pharmaceutical Sciences, University of Geneva, CH-1206 Geneva, Switzerland; (A.P.); (P.G.F.); (E.A.); (O.J.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CH-1206 Geneva, Switzerland
| | - Olivier Jordan
- School of Pharmaceutical Sciences, University of Geneva, CH-1206 Geneva, Switzerland; (A.P.); (P.G.F.); (E.A.); (O.J.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CH-1206 Geneva, Switzerland
| | - Lee Ann Applegate
- Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, CH-1066 Lausanne, Switzerland; (P.A.-S.); (C.S.); (N.H.-B.); (M.M.); (L.A.A.)
- Lausanne Burn Center, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland;
- Plastic, Reconstructive, and Hand Surgery Service, Lausanne University Hospital, University of Lausanne, CH-1011 Lausanne, Switzerland
- Center for Applied Biotechnology and Molecular Medicine, University of Zurich, CH-8057 Zurich, Switzerland
- Oxford OSCAR Suzhou Center, Oxford University, Suzhou 215123, China
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Lu L, Liu S, Dong Q, Xin Y. Salidroside suppresses the metastasis of hepatocellular carcinoma cells by inhibiting the activation of the Notch1 signaling pathway. Mol Med Rep 2019; 19:4964-4972. [PMID: 30942419 DOI: 10.3892/mmr.2019.10115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 03/26/2019] [Indexed: 11/06/2022] Open
Abstract
Salidroside (SDS) is a phenylpropanoid glycoside isolated from Rhodiola rosea L. It exhibits multiple pharmacological properties in clinical medicine and has been commonly used in traditional Chinese medicine. The present study investigated the inhibitory effects of SDS on tumor invasion and migration, and the expression of metastasis‑related genes in highly metastatic hepatocellular carcinoma (HCC) cells (MHCC97H) in vitro. The underlying mechanisms of SDS on the tumor metastasis were also explored. SDS was found to significantly reduce wound closure areas and inhibit cell migration. In addition, SDS markedly inhibited the invasion of these cells into Matrigel‑coated membranes. SDS markedly downregulated the expression of Notch1, Snail, COX‑2, MMP‑2, MMP‑9 genes and upregulated the expression of E‑cadherin in a dose‑dependent manner. Furthermore, SDS inhibited the expression of the Notch signaling target genes, Hey1, Hes1 and Hes5. On the whole, the findings of this study suggest that SDS inhibits HCC cell metastasis by modulating the activity of the Notch1 signaling pathway.
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Affiliation(s)
- Linlin Lu
- Department of Clinical Medicine, Qingdao University, Qingdao University Hospital, Qingdao, Shandong 266003, P.R. China
| | - Shousheng Liu
- Central Laboratories, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China
| | - Quanjiang Dong
- Central Laboratories, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China
| | - Yongning Xin
- Digestive Disease Key Laboratory of Qingdao, Qingdao, Shandong 266071, P.R. China
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Yu G, Li N, Zhao Y, Wang W, Feng XL. Salidroside induces apoptosis in human ovarian cancer SKOV3 and A2780 cells through the p53 signaling pathway. Oncol Lett 2018; 15:6513-6518. [PMID: 29616120 DOI: 10.3892/ol.2018.8090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 11/16/2017] [Indexed: 12/15/2022] Open
Abstract
Salidroside is one of the most potent compounds extracted from the plant Rhodiola rosea, and its cardiovascular protective effects have been studied extensively. However, the role of salidroside in human ovarian carcinoma remains unknown. The aim of the current study was to investigate the effects of salidroside on the proliferation and apoptosis of SKOV3 and A2780 cells using MTT assay and acridine orange/ethidium bromide staining. Salidroside activated caspase-3 and upregulated the levels of apoptosis-inducing factor, Bcl-2-associated X and Bcl-2-associated death promoter (Bad) proteins. Furthermore, salidroside downregulated the levels of Bcl-2, p-Bad and X-linked inhibitor of apoptosis proteins. Salidroside activated the caspase-dependent pathway in SKOV3 and A2780 cells, upregulating p53, p21Cip1/Waf1 and p16INK4a. These results suggest that the p53/p21Cip1/Waf1/p16INK4a pathway may serve a key function in salidroside-mediated effects on SKOV3 and A2780 cells. The current findings indicate that salidroside may be a promising novel drug candidate for ovarian cancer therapy.
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Affiliation(s)
- Ge Yu
- Department of Gynecology of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
| | - Na Li
- Department of Gynecology of Traditional Chinese Medicine, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
| | - Yan Zhao
- Department of Gynecology of Traditional Chinese Medicine, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
| | - Wei Wang
- Department of Gynecology of Traditional Chinese Medicine, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
| | - Xiao-Ling Feng
- Department of Gynecology of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China.,Department of Gynecology of Traditional Chinese Medicine, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
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Xue XH, Feng ZH, Li ZX, Pan XY. Salidroside inhibits steroid-induced avascular necrosis of the femoral head via the PI3K/Akt signaling pathway: In vitro and in vivo studies. Mol Med Rep 2017; 17:3751-3757. [PMID: 29286130 PMCID: PMC5802182 DOI: 10.3892/mmr.2017.8349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 12/14/2017] [Indexed: 12/11/2022] Open
Abstract
Dexamethasone (Dex) and other glucocorticoids are widely used to treat serious infections and immunological diseases, however they may cause steroid-induced avascular necrosis of the femoral head (SANFH). Salidroside (Sal) has demonstrated an anti-apoptotic effect on neurocytes by activating the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway. In the present study, primary osteoblasts were used in vitro and in rats in vivo to determine the anti-apoptotic effect of Sal on SANFH. The result of the present study demonstrated that pretreatment with Sal increased the cell survival rate while decreasing the cell apoptosis and lactate dehydrogenase release rate. Additionally, Sal also caused the reduction of TUNEL positive cells in TUNEL staining assay. Sal decreased the expression of cleaved caspase-3, cleaved caspase-9, apoptosis regulator BAX and cytochrome C, while it increased the expression of B cell lymphoma-2 and phosphorylated-Akt in Dex-induced osteoblasts. In vivo Sal protected against SANFH in rats by decreasing the percentage of empty lacunae. The present study demonstrated that Sal alleviated Dex-induced osteoblast apoptosis by activating the PI3K/Akt signaling pathway and downregulating caspase-3 expression in osteoblasts. Sal also protected against SANFH in a rat model of SANFH by decreasing the percentage of empty lacunae. The inhibition of the mitochondrial apoptosis pathway was also involved. Further research is required to determine the full underlying mechanisms by which Sal has an effect.
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Affiliation(s)
- Xing-He Xue
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Zhen-Hua Feng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Zhen-Xing Li
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Xiao-Yun Pan
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
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Wongekalak LO, Hongsprabhas P. Influence of carbohydrates on self-association of mung bean protein hydrolysate in the presence of amphiphilic asiatic acid. Int J Food Sci Technol 2013. [DOI: 10.1111/ijfs.12425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- La-Ongdao Wongekalak
- Department of Food Science and Technology; Faculty of Agro-Industry; Kasetsart University; 50 Ngam Wong Wan Road Chatuchak Bangkok 10900 Thailand
| | - Parichat Hongsprabhas
- Department of Food Science and Technology; Faculty of Agro-Industry; Kasetsart University; 50 Ngam Wong Wan Road Chatuchak Bangkok 10900 Thailand
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Use of β-galactosidase liposome model as a novel method to screen freeze-drying cryoprotectants. World J Microbiol Biotechnol 2013; 29:1907-12. [DOI: 10.1007/s11274-013-1355-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/15/2013] [Indexed: 02/04/2023]
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Preservation of human tear protein structure and function by a novel contact lens multipurpose solution containing protein-stabilizing agents. Eye Contact Lens 2012; 38:36-42. [PMID: 22146703 DOI: 10.1097/icl.0b013e31823fdb2a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Tear film proteins have antimicrobial and other functions that may be lost after denaturation during contact lens wear. A new multipurpose solution has recently become available (Biotrue, Bausch + Lomb Inc., Rochester, NY), which contains protein-stabilizing agents including hyaluronic acid, poloxamine, and sulfobetaine 10, the latter used previously as a laboratory tool to renature proteins. We examine whether this new multipurpose solution formulation can prevent the denaturation of human lactoferrin and lysozyme at physiologic levels in response to a powerful denaturing challenge. METHODS Human lactoferrin and lysozyme were treated with sodium dodecyl sulfate (SDS) either with or without an investigational version of the new multipurpose solution (without its two disinfectant agents) (investigational multipurpose solution [iMPS]). The structure was assessed by native-polyacrylamide gel electrophoresis (PAGE), differential scanning calorimetry (DSC), and fluorometry; additionally, antimicrobial activity against Pseudomonas aeruginosa and Staphylococcus aureus was measured. RESULTS The iMPS prevented an SDS-induced shift in the native-PAGE banding position of lactoferrin. The SDS treatment substantially altered the lactoferrin DSC and fluorescence spectra, indicating that the protein had denatured. This change did not occur in the presence of iMPS. Lactoferrin and lysozyme showed antibacterial and bacteriolytic activity, which was abolished after SDS treatment; this loss of activity did not occur for proteins treated with iMPS. CONCLUSIONS These data clearly show that the iMPS prevents the denaturation of physiologic levels of human lactoferrin and lysozyme by the strongly denaturing surfactant SDS and that stabilized proteins retain their function. We conclude that this solution has the capacity to stabilize the structure and function of tear proteins.
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Imamura K, Yokoyama T, Fukushima A, Kinuhata M, Nakanishi K. Water Sorption Glass Transition Protein-Stabilizing Behavior of an Amorphous Sucrose Matrix Combined With Various Materials. J Pharm Sci 2010; 99:4669-77. [DOI: 10.1002/jps.22162] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Khoramnia A, Abdullah N, Liew SL, Sieo CC, Ramasamy K, Ho YW. Enhancement of viability of a probiotic Lactobacillus strain for poultry during freeze-drying and storage using the response surface methodology. Anim Sci J 2010; 82:127-35. [PMID: 21269371 DOI: 10.1111/j.1740-0929.2010.00804.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A rotatable central composite design (CCD) was used to study the effect of cryoprotectants (skim milk, sucrose and lactose) on the survival rate of a probiotic Lactobacillus strain, L. reuteri C10, for poultry, during freeze-drying and storage. Using response surface methodology, a quadratic polynomial equation was obtained for response value by multiple regression analyses: Y = 8.59546-0.01038 X(1)-0.09382 X(2)-0.07771 X(3)-0.054861 X(1)(2)-0.04603 X(3)(2)-0.10938 X(1)X(2). Based on the model predicted, sucrose exerted the strongest effect on the survival rate. At various combinations of cryoprotectants, the viability loss of the cells after freeze-drying was reduced from 1.65 log colony forming units (CFU)/mL to 0.26-0.66 log CFU/mL. The estimated optimum combination for enhancing the survival rate of L. reuteri C10 was 19.5% skim milk, 1% sucrose and 9% lactose. Verification experiments confirmed the validity of the predicted model. The storage life of freeze-dried L. reuteri C10 was markedly improved when cryoprotectants were used. At optimum combination of the cryoprotectants, the survival rates of freeze-dried L. reuteri C10 stored at 4°C and 30°C for 6 months were 96.4% and 73.8%, respectively. Total viability loss of cells which were not protected by cryoprotectants occurred after 12 and 8 weeks of storage at 4°C and 30°C, respectively.
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Affiliation(s)
- Anahita Khoramnia
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia
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Abstract
The role of osmolytes, and especially trehalose, in stabilizing proteins under stress conditions is now a widely accepted fact. The physical and chemical properties of trehalose, i.e., low chemical reactivity, nonreducing nature, high glass transition temperature, high affinity for water molecules, existence of a number of polymorphs, etc., make it uniquely suitable for stabilizing partially unfolded protein molecules and inhibiting protein aggregation. This article discusses the various adverse situations that protein molecules face, both within the cell and outside, leading to their aggregation and inactivation. The use of trehalose in stabilizing protein molecules and helping them retain their functionally active forms under such conditions is examined. The various theories and mechanisms used to explain the protective action of trehalose are briefly presented. The experimental tools that can be used to decipher the mechanism of aggregation and the role of trehalose are also discussed.
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Affiliation(s)
- Nishant Kumar Jain
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab, India
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