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MicroRNAs, identified in the early 1990s, are believed to regulate approximately 30% of the human genome. The role of microRNA in bone cells was first reported in 2007 in a manuscript showing that microRNA-223 is essential for osteoclast differentiation in vitro, and a few studies reported a role of microRNAs in osteoblasts the same year. see more The first report of microRNA actions in osteocytes was published in 2010, in which it was demonstrated that the microRNA cluster 23a~27a~24-2 regulates osteocyte differentiation. Since then, few studies have described the role of these 18-25-nucleotide non-coding RNAs on osteocyte biology, reporting osteocytes both as producers and as targets of the actions of microRNAs. We review here the current knowledge on the effects of microRNAs on osteocyte biology.Human papillomaviruses (HPV) infection is a major causative agent and strongly associated with the development of cervical cancer. Understanding the mechanisms of HPV-induced cervical cancer is extremely useful in therapeutic strategies for primary prevention (HPV vaccines) and secondary prevention (screening and diagnosis of precancerous lesions). However, due to the lack of proper implementation of screening programs in developing countries, cervical cancer is usually diagnosed at advanced stages that result in poor treatment responses. Nearly half of the patients will experience disease recurrence within two years post treatment. Therefore, it is vital to identify new tools for early diagnosis, prognosis, and treatment prediction. MicroRNAs (miRNAs) are small non-coding RNAs, implicated in posttranscriptional regulation of gene expression. Growing evidence has shown that abnormal miRNA expression is associated with cervical cancer progression, metastasis, and influences treatment outcomes. In this review, we provide comprehensive information about miRNA and their potential utility in cervical cancer diagnosis, prognosis, and clinical management to improve patient outcomes.Drawing on two assumptions that menopause is an instrument for the efficient regulation of the duration of a biologically expensive state, and that people have children in order to obtain support from them in old age, we set out a new idea that seeks to explain both the occurrence of menopause and its timing. On the basis of the notion that the purpose of having children is to obtain support in old age, we perceive menopause as an upper limit to the fertile state, when a continued ability to give birth to children would not generate the desired support. The conjecture yields specific testable predictions, and can be assessed against the "reproductive conflict" hypothesis. Being supported by one's offspring is a distinctive feature of humans; in this context, we cannot rely on animal studies in evolutionary biology and related fields to help us to ascertain something that is specific to humans.Electron paramagnetic resonance (EPR) oximetry, using oxygen-sensing implant such as OxyChip, is capable of measuring oxygen concentration in vivo - a critical tissue information required for successful medical treatment such as cancer, wound healing and diabetes. Typically, EPR oximetry produces one value of the oxygen concentration, expressed as pO2 at the site of implant. However, it is well recognized that in vivo one deals with a distribution of oxygen concentration and therefore reporting just one number is not representative_a long-standing critique of EPR oximetry. Indeed, when it comes to the assessment of radiation efficacy one should be guided not by the mean or median but the proportion of oxygenated cancer cells which can be estimated only when the whole oxygen distribution in the tumor is known. Although there is a handful of papers attempting estimation of the oxygen distribution they suffer from the problem of negative frequencies and no theoretical justification and no biomedical interpretation. The goal of this work is to suggest a novel method using the empirical Bayesian approach realized via nonlinear mixed modeling with a priori distribution of oxygen following a two-parameter lognormal distribution with parameters estimated from the multi-implant single component EPR scan. Unlike previous work, the result of our estimation is the distribution with positive values for the frequency and the associated pO2 value. Our algorithm based on nonlinear regression is illustrated with EPR measurements on OxyChips equilibrated with gas mixtures containing four values of pO2 and computation of the proportion of volume with pO2 greater than any given threshold. This approach may become crucial for application of the EPR oximetry in clinical setting when the sucsess of the treatment depends of the proportion of tissue oxygenated.
Multimodal analgesia is considered a key element of enhanced recovery programmes (ERPs) after colorectal surgery. We investigated the effects of NSAIDs, a major component of multimodal analgesia on adherence to ERP, incidence of postoperative complications, and length of hospital stay (LOS).
This was a retrospective study of the GRACE database that included 8611 patients scheduled for colorectal surgery with an ERP between February 2016 and November 2019. Primary endpoints were adherence to the postoperative protocol, the rate and type of postoperative complications, and LOS. Data are median [IQR] and number (per cent). Multivariate models were used to assess the effects of NSAIDs on these variables taking into account potential confounding factors.
Data from 8258 patients were analysed and classified into four groups according to whether NSAIDs had been given intra- and/or postoperatively or not at all; 4578 patients were given NSAIDs intra- and/or postoperatively and 3680 patients received no NSAIDs. Use of NSAIDs was significantly (P<0.001) associated with improved adherence to the postoperative protocol (4.0 [3.0-4.0] vs. 3.0 [2.0-4.0] items), a reduced incidence of complications (21.1% vs. 29.2%), and a shortened LOS (5.0 [3.0-7.0] vs. 6.0 [4.0-9.0] days) compared to the no-NSAIDs group. Multivariate analyses adjusted for the confounding factors confirmed a significant (P<0.001) beneficial impact of NSAIDs on these three primary endpoints.
This study suggests that perioperative NSAID use results in better adherence to the postoperative protocol, fewer postoperative in-hospital complications, and shorter LOS after colorectal surgery.
This study suggests that perioperative NSAID use results in better adherence to the postoperative protocol, fewer postoperative in-hospital complications, and shorter LOS after colorectal surgery.
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