Chitosan (CS) presents antibacterial, mucoadhesive and hemostatic properties and is an ideal candidate for wound dressing applications. This work reports the development of sponge-like materials obtained from physical hydrogels after the interaction between CS and a β-cyclodextrin polymer (PCD) in acidic conditions to provoke immediate gelation. Characterization consisted of zeta potential (ZP) measurements, rheology analysis, Fourier transform infrared (FTIR), Raman spectroscopy, wide angle X-ray scattering (WAXS) and scanning electron microscopy (SEM). Swelling behavior, cytotoxicity, drug sorption and drug delivery properties of sponges were assessed. ZP indicated that CS and PCD presented opposite charges needed for physical crosslinking. Rheology, swelling, and cytotoxicity of sponges depended on their CS:PCD weight ratios. Increasing PCD in the mixture delayed the gel time, reduced the swelling and increased the cytotoxicity. FTIR and Raman confirmed the physical crosslinking between CS and PCD through ionic interactions, and WAXS showed the amorphous state of the sponges. Finally, the efficiency of chlorhexidine loaded sponge against S. aureus bacteria was proved for up to 30days in agar diffusion tests.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.carbpol.2017.06.026 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A comparison of acellular dermal matrices (ADM) efficacy and complication profile in women undergoing implant-based breast reconstruction: a systematic review and network meta-analysis.
BMC Cancer
December 2024
Department of Plastic Surgery, University College London, London, UK.
Introduction: Breast cancer is the leading cause of cancer amongst women in the United Kingdom, with implant-based reconstruction (IBR) using Acellular Dermal Matrices (ADM) gaining popularity for post-mastectomy procedures. This study compares outcomes of different ADMs that are commonly used in women undergoing IBR, this was short and long-term complications.
Methods: A systematic search of MEDLINE, Embase, CENTRAL, and CDSR databases was performed according to the PRISMA guidelines, focusing on women undergoing IBR with FlexHD, AlloDerm, Bovine, or Porcine ADMs.
Coenzyme Q10 Alleviates Silicosis Fibrosis Inhibiting Ferroptosis in Mice.
In Vivo
December 2024
College of Biology, Hunan University, Changsha, P.R. China;
Background/aim: Silicosis, the most severe type of occupational pneumoconiosis, leads to diffuse pulmonary fibrosis without specific therapy. Ferroptosis is triggered by reactive oxygen species (ROS) and Fe overload-induced lipid peroxidation, which is involved in the progression of pulmonary fibrosis. As an important coenzyme in the process of aerobic respiration, Coenzyme Q10 (CoQ10) can enhance mitochondrial function and energy supply and reduce malondialdehyde (MDA) to limit the risk of fibrosis.
View Article and Find Full Text PDFActivation of caged functional RNAs by an oxidative transformation.
Chembiochem
December 2024
University of Minnesota, Department of Genetics, Cell Biology, and Development, MCB 5-130, 420 Washington Avenue SE, 55455, Minneapolis, UNITED STATES OF AMERICA.
RNA exhibits remarkable capacity as a functional polymer, with broader catalytic and ligand-binding capability than previously thought. Despite this, the low side chain diversity present in nucleic acids (two purines and two pyrimidines) relative to proteins (20+ side chains of varied charge, polarity, and chemical functionality) limits the capacity of functional RNAs to act as environmentally responsive polymers, as is possible for peptide-based receptors and catalysts. Here we show that incorporation of the modified nucleobase 2-thiouridine (2sU) into functional (aptamer and ribozyme) RNAs produces functionally inactivated polymers that can be activated by oxidative treatment.
View Article and Find Full Text PDFHaemodynamic measurements during hip hemiarthroplasty surgery for hip fracture.
Bone Joint J
January 2025
Oxford Trauma and Emergency Care, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Kadoorie Centre, University of Oxford, Oxford, UK.
Aims: There is compelling evidence for the use of cemented hip hemiarthroplasty for displaced intracapsular hip fractures; however, the risks of cement are well reported and in rare cases may be associated with haemodynamic collapse. It is therefore important to improve our understanding of haemodynamic instability, intraoperative monitoring, and strategies to reduce the risk to patients.
Methods: We measured arterial blood pressure using the LiDCO Continuous Non-invasive Arterial Pressure (CNAP) finger cuff during surgery in patients enrolled in the WHiTE 5 trial randomized to cemented or modern uncemented hip hemiarthroplasty at a single recruiting site.
Turn-off fluorescent magnetic Mn-ZnS molecularly imprinted probe for the detection of chlorpyrifos in vegetable samples.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Chemistry, Punjabi University, Patiala 147002, Punjab, India. Electronic address:
A sensitive and efficient fluorescent sensor based on a magnetic manganese-doped zinc sulfide molecularly imprinted probe (FeO/Mn-ZnS/MIP) was successfully developed for the detection of chlorpyrifos (CPF). The probe combined the advantages of magnetic separation, the fluorescence properties of Mn-ZnS, and the exceptional molecule recognition capabilities of molecularly imprinted polymers. The developed sensor exhibits selective binding to CPF, resulting in a quenching of fluorescence intensity of FeO/Mn-ZnS/MIP by a photo-induced electron transfer mechanism.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!