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https://hdl.handle.net/2440/10829
2024-03-29T00:19:33ZAntimicrobial and healing promoting properties of animal and plant oils for treatment of infected wounds
https://hdl.handle.net/2440/140057
Title: Antimicrobial and healing promoting properties of animal and plant oils for treatment of infected wounds
Author: Tahlia, K.; Mashtoub, S.; Howarth, G.; Allison, C.; Kopecki, Z.
Abstract: Chronic wounds are a serious medical problem both in the hospital and community setting. The healing of chronic wounds is often compromised by colonisation of different bacterial pathogens leading to life-threatening infections. Bacterial infections are a critical contributing factor to chronic wounds and can lead to biofilm formation and inhibition of innate inflammatory responses, including the reduction of acute inflammation. Concerningly, the overuse of systemic antibiotics and the use of traditional therapeutics, including topical antimicrobials – iodine, chlorhexidine and silver – have both greatly contributed to the development of a global increase in antimicrobial resistance. This has therefore led to a renewed interest in natural and alternative antimicrobial treatment strategies in wound care for the treatment of infected wounds. This review summarises the pre-clinical and clinical evidence that exists for the use of natural remedies, namely essential and animal oils, as adjunctive therapeutic approaches for the treatment of infected wounds. It also discusses novel approaches in nanotechnology that are being used for the development of natural remedies aimed at improving the healing of infected chronic wounds.2019-01-01T00:00:00ZA new method to measure aquaporin-facilitated membrane diffusion of hydrogen peroxide and cations in plant suspension cells
https://hdl.handle.net/2440/139886
Title: A new method to measure aquaporin-facilitated membrane diffusion of hydrogen peroxide and cations in plant suspension cells
Author: Ahmed, J.; Ismail, A.; Ding, L.; Yool, A.J.; Chaumont, F.
Abstract: Plant aquaporins (AQPs) facilitate the membrane diffusion of water and small solutes, including hydrogen peroxide (H2 O2 ) and, possibly, cations, essential signalling molecules in many physiological processes. While the determination of the channel activity generally depends on heterologous expression of AQPs in Xenopus oocytes or yeast cells, we established a genetic tool to determine whether they facilitate the diffusion of H2 O2 through the plasma membrane in living plant cells. We designed genetic constructs to co-express the fluorescent H2 O2 sensor HyPer and AQPs, with expression controlled by a heat shock-inducible promoter in Nicotiana tabacum BY-2 suspension cells. After induction of ZmPIP2;5 AQP expression, a HyPer signal was recorded when the cells were incubated with H2 O2 , suggesting that ZmPIP2;5 facilitates H2 O2 transmembrane diffusion; in contrast, the ZmPIP2;5W85A mutated protein was inactive as a water or H2 O2 channel. ZmPIP2;1, ZmPIP2;4 and AtPIP2;1 also facilitated H2 O2 diffusion. Incubation with abscisic acid and the elicitor flg22 peptide induced the intracellular H2 O2 accumulation in BY-2 cells expressing ZmPIP2;5. We also monitored cation channel activity of ZmPIP2;5 using a novel fluorescent photo-switchable Li+ sensor in BY-2 cells. BY-2 suspension cells engineered for inducible expression of AQPs as well as HyPer expression and the use of Li+ sensors constitute a powerful toolkit for evaluating the transport activity and the molecular determinants of PIPs in living plant cells.
Description: First published: 09 November 20232024-01-01T00:00:00ZRepetitive paired-pulse TMS increases motor cortex excitability and visuomotor skill acquisition in young and older adults
https://hdl.handle.net/2440/139438
Title: Repetitive paired-pulse TMS increases motor cortex excitability and visuomotor skill acquisition in young and older adults
Author: Hand, B.J.; Merkin, A.; Opie, G.M.; Ziemann, U.; Semmler, J.G.
Abstract: Transcranial magnetic stimulation (TMS) over primary motor cortex (M1) recruits indirect (I) waves that can be modulated by repetitive paired-pulse TMS (rppTMS). The purpose of this study was to examine the effect of rppTMS on M1 excitability and visuomotor skill acquisition in young and older adults. A total of 37 healthy adults (22 young, 18-32 yr; 15 older, 60-79 yr) participated in a study that involved rppTMS at early (1.4 ms) and late (4.5 ms) interstimulus intervals (ISIs), followed by the performance of a visuomotor training task. M1 excitability was examined with motor-evoked potential (MEP) amplitudes and short-interval intracortical facilitation (SICF) using posterior-anterior (PA) and anterior-posterior (AP) TMS current directions. We found that rppTMS increased M1 excitability in young and old adults, with the greatest effects for PA TMS at the late ISI (4.5 ms). Motor skill acquisition was improved by rppTMS at an early (1.4 ms) but not late (4.5 ms) ISI in young and older adults. An additional study using a non-I-wave interval (3.5 ms) also showed increased M1 excitability and visuomotor skill acquisition. These findings show that rppTMS at both I-wave and non-I-wave intervals can alter M1 excitability and improve visuomotor skill acquisition in young and older adults.
Description: Published: 08 September 20232023-01-01T00:00:00ZProphylactic probiotics for cancer therapy-induced diarrhoea: A meta-analysis
https://hdl.handle.net/2440/139018
Title: Prophylactic probiotics for cancer therapy-induced diarrhoea: A meta-analysis
Author: Wardill, H.R.; Van Sebille, Y.Z.A.; Ciorba, M.A.; Bowen, J.M.
Abstract: PURPOSE OF REVIEW: Strong preclinical data support prophylactic probiotics as an effective preventive strategy for diarrhoea secondary to anticancer therapies. To determine the composite evidence that this approach translates to the clinic, we performed a meta-analysis of randomized controlled trials (RCTs) of prophylactic probiotics for the prevention of cancer therapy-induced diarrhoea. RECENT FINDINGS: A three-step search strategy was used to identify relevant studies (1 June 2000-1 June 2017) investigating probiotic intervention for diarrhoea secondary to any cancer therapy (cytotoxic, targeted and immunotherapies). RCTs across PubMed, Embase, CINAHL and CENTRAL were assessed for eligibility and assessed using RevMan 5.3 (The Cochrane Collaboration). Seven trials with a total of 1091 patients were included in this meta-analysis. Compared with placebo, prophylactic probiotics did not prevent or reduce the overall incidence of diarrhoea or severe CTCAE Grade at least 3 diarrhoea [relative risk (RR) = 0.81, 95% confidence interval (95% CI) = 0.60-1.09, Z = 1.41, P = 0.16; RR = 0.54, 95% CI = 0.25-1.16, Z = 1.58, P = 0.11], nor did it influence the use of rescue medication (RR = 0.93, 95% CI = 0.53-1.65, Z = 0.24, P = 0.81). SUMMARY: Current evidence does not support widespread implementation of probiotics for diarrhoea secondary to cytotoxic therapy and the tyrosine kinase inhibitor, dacomitinib. Research efforts should be diverted to pair specific forms of gastrointestinal toxicity and their unique microbial phenotype to develop the ideal microbial protectant.2018-01-01T00:00:00Z