Realisation and assessment of a low-cost LED device for contact lens disinfection by visible violet light.

This study presents a device for efficient, low-cost and eye-friendly overnight disinfection of contact lenses by visible violet light as an alternative to disinfection with biocide-containing solutions. Bacterial solutions with one Pseudomonas and one Staphylococcus strain each were irradiated for up to 8 h in commercial transparent contact lens cases by the presented light-emitting diode (LED) device. Samples were taken at different intervals and distributed on agar plates. The surviving bacteria were determined by counting of colony-forming units and compared to the specific requirements of the stand-alone test for contact lens disinfection of the hygiene standard ISO 14729. The concentration of both microorganisms was reduced by three orders of magnitude after less than 4 h of irradiation. The LED current and intensity have not yet been at maximum and could be further increased if necessary for other microorganisms. The presented device fulfils the requirement of the stand-alone test of the contact lens hygienic standard ISO 14729 for the tested Pseudomonas and Staphylococcus strains. According to literature data, the inactivation of Serratia marcescens, Candida albicans and Fusarium solani seems also possible, but may require increased LED current and intensity. PMID: 31809261 [PubMed - as supplied by publisher]
Source: Biomedizinische Technik/Biomedical Engineering - Category: Biomedical Engineering Tags: Biomed Tech (Berl) Source Type: research

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This study aimed to statistically optimize the covalent immobilization of Candida rugosa lipase (CRL) onto a ternary support comprised of OPFL derived nanocellulose (NC) and montmorillonite (MMT) in alginate (ALG) (CRL-ALG/NC/MMT). The coarser topology and the presence of characteristic spherical globules in the field emission scanning electron micrographs and atomic force micrographs, respectively, supported the existence of CRL on ALG/NC/MMT. In addition, amide peaks at 3478 and 1640 cm-1 in the fourier transform infrared spectra affirmed that CRL was covalently bonded to ALG/NC/MMT. The optimized Taguchi Design-a...
Source: Enzyme and Microbial Technology - Category: Biotechnology Source Type: research
Publication date: Available online 17 January 2020Source: Stem Cell ResearchAuthor(s): Kathrin Haake, Tim Wüstefeld, Sylvia Merkert, Doreen Lüttge, Gudrun Göhring, Bernd Auber, Ulrich Baumann, Nico LachmannAbstractChronic mucocutaneous candidiasis (CMC) is a disease that is characterized by susceptibility to chronic or recurrent infections with Candida spp. due to mutations affecting mainly the IL17 signaling of T-Cells. The most common etiologies of CMC are gain-of-function (GOF) mutations in the STAT1 gene. In this paper we report the generation of a hiPSC line from a patient suffering from CMC due to a he...
Source: Stem Cell Research - Category: Stem Cells Source Type: research
; Luiz Chambo Ricardo Miguel Costa de Freitas Berenice Bilharinho Mendonca Ana O. Hoff Madson Q. Almeida Isabel Weigand Matthias Kroiss Maria Claudia Nogueira Zerbini Maria Candida Barisson Villares Fragoso Adrenocortical carcinoma (ACC) is a rare endocrine malignancy with an unfavorable prognosis. Despite the poor prognosis in the majority of patients, no improvements in treatment strategies have been achieved. Therefore, the discovery of new prognostic biomarkers is of enormous interest. Sterol-O-acyl transferase 1 (SOAT1) is involved in cholesterol esterification and lipid droplet formation. Recently...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
ConclusionsSH0.25% demonstrated potential for Candida spp. control in denture wearers with DS. The other protocols showed intermediate activity and might be more suitable for longer immersion periods.
Source: The Journal of Prosthetic Dentistry - Category: Dentistry Source Type: research
Publication date: Available online 16 January 2020Source: Fungal BiologyAuthor(s): Alistair J.P. Brown, Daniel E. Larcombe, Arnab PradhanAbstractThe model yeasts, Saccharomyces cerevisiae and Schizosaccharomyces pombe, display Core Environmental Responses (CERs) that include the induction of a core set of stress genes in response to diverse environmental stresses. CERs underlie the phenomenon of stress cross-protection, whereby exposure to one type of stress can provide protection against subsequent exposure to a second type of stress. CERs have probably arisen through the accumulation, over evolutionary time, of protectiv...
Source: Fungal Biology - Category: Biology Source Type: research
Publication date: Available online 15 January 2020Source: Biochimica et Biophysica Acta (BBA) - BiomembranesAuthor(s): Gopal Pandit, Karishma Biswas, Suvankar Ghosh, Swapna Debnath, Anil P. Bidkar, Priyadarshi Satpati, Anirban Bhunia, Sunanda ChatterjeeAbstractThe widespread abuse of antibiotics has led to the use of antimicrobial peptides (AMPs) as a replacement for the existing conventional therapeutic agents for combating microbial infections. The broad-spectrum activity and the resilient nature of AMPs has mainly aggrandized their utilization. Here, we report the design of non-toxic, non-hemolytic and salt tolerant und...
Source: Biochimica et Biophysica Acta (BBA) Biomembranes - Category: Biochemistry Source Type: research
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Source: BMC Infectious Diseases - Category: Infectious Diseases Authors: Tags: Research article Source Type: research
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Source: BMC Genomics - Category: Genetics & Stem Cells Authors: Tags: Research article Source Type: research
Interleukin-1 (IL-1) is a key mediator of inflammation and immunity. Naturally-occurring IL-1 receptor antagonist (IL-1Ra) binds and blocks the IL-1 receptor-1 (IL-1R1), preventing signaling. Anakinra, a recombinant form of IL-1Ra, is used to treat a spectrum of inflammatory diseases. However, anakinra is rapidly cleared from the body and requires daily administration. To create a longer-lasting alternative, PASylated IL-1Ra (PAS–IL-1Ra) has been generated by in-frame fusion of a long, defined-length, N-terminal Pro/Ala/Ser (PAS) random-coil polypeptide with IL-1Ra. Here, we compared the efficacy of two PAS–IL-...
Source: Journal of Biological Chemistry - Category: Chemistry Authors: Tags: Immunology Source Type: research
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Source: European Archives of Oto-Rhino-Laryngology - Category: ENT & OMF Source Type: research
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