Advances in experimental medicine and biology最新文献

The objective was to quantify the effect of endovascular therapy (EVT) results of large-vessel occlusion (LVO) on brain tissue hydration, assessed by net water uptake (NWU).

Materials and methods: Ninety-three patients with EVT of acute ischemic stroke (AIS) due to acute LVO (men-44, women-49, median age 68.7) were included in this retrospective, non-randomized, single-center study. EVT was performed under general anesthesia with approved devices, including a stent retriever and aspiration catheters. Net water uptake (NWU) in ischemic zones was evaluated using non-contrasted computed tomography (CT). NWU was calculated using the well-known formula in the symmetrical zone of the brain, in admission and follow-up non-contrasted CT scans, 24 h after EVT.

Results: Fifty-seven patients had successful arterial recanalization (Thrombolysis in Cerebral Infarction scale [TICI] 2b-3), while 36 patients had persistent or recurrent acute LVO (TICI 0-2a). The NWU median at admission was 3.4% in patients with successful EVT and 5.1% in patients with unsuccessful EVT (p < 0.05). The follow-up NWU median was 7.2% after successful EVT and 12.8% in patients with persistent/recurrent acute LVO (p < 0.001).

Conclusion: Successful arterial recanalization at AIS due to LVO (TICI 2b -3) led to a significant reduction in brain edema progression in cerebral ischemic foci.

Broadband NIRS (bNIRS) is an extension of fNIRS that provides the same assessment of oxygenation biomarkers along with a valuable marker for oxygen metabolism at a cellular level, the oxidation state of cytochrome-c-oxidase (oxCCO). bNIRS implements many (100s) wavelengths in the NIR spectrum to address this and provide insight into tissue energetics. To supply these many wavelengths of light, broadband sources are required, and spectrometers are employed to distinguish power per wavelength. Current multi-channel bNIRS instruments are bulky and only semi-portable due to technological limitations. We propose a design for a bNIRS device that has been miniaturised to allow for portable use. This design leverages the innovations in photonic devices that have created a new line of SMD-type micro-spectrometers and broadband NIR high-power LEDs. This first-of-its-kind device, referred to as microCYRIL (after its two predecessors CYRIL and miniCYRIL), has been developed for oxygenation and metabolism measurements with dual channel operation. To validate functionality, concentration changes in oxygenated (HbO₂) and deoxygenated (HHb) haemoglobin and oxCCO were successfully tracked during a cuff-induced brachial arterial occlusion.

Cognitive impairment has been closely associated with systemic metabolic disorders, such as oxygen and energy metabolism disorders. We used deep learning to estimate the risk of mild cognitive impairment (MCI) in outpatients with pain (pain group) and those without pain (non-pain control group) from general blood test data reflecting systemic metabolic disorders. Univariate analysis was performed on blood test data from both groups to calculate the estimated Mini-Mental State Examination (MMSE) scores. Additionally, principal component analysis was conducted on data obtained from eight assessment batteries, comprising 12 items commonly used by Japanese pain treatment institutions. Cluster analysis was also performed using Ward's method on seven components with cumulative proportions exceeding 90%. Our results showed that patients suffering from pain had significantly lower estimated MMSE scores than controls, despite no significant age differences. Patients suffering from pain had significantly higher white blood cell, triglyceride, glucose, and potassium values and significantly lower red blood cell, hemoglobin (Hgb), and uric acid values. Notably, Hgb values were significantly lower only in men, with no significant differences in women. Cluster analysis of the assessment battery data revealed five distinct clusters (Euclidean distance: 10.14%). The average MMSE score of the cluster with an extremely low value for the first component was 27.1, whereas the scores for the other clusters fell below the MCI cutoff. The first component primarily reflects mobility, suggesting that patients suffering from pain with reduced mobility are at increased risk of mild dementia. This finding indicates that impaired mobility due to pain can promote systemic metabolic disorders, subsequently increasing the risk of MCI.

Wild animals exhibit diverse reproductive processes crucial for species survival, and recent research has unveiled the integral role of extracellular vesicles (EVs) in orchestrating various aspects of their reproductive survival. This chapter explores the multifaceted involvement of EVs in wild animals' reproduction, encompassing oocyte maturation, spermatogenesis, sperm cryopreservation, preimplantation embryo development, embryo implantation, and the transmission of EVs from male to female. EVs play a pivotal role in oocyte maturation, influencing crucial molecular environments for successful fertilization. Furthermore, the intersection of EVs and spermatogenesis sheds light on how these vesicles contribute to the intricate process of sperm development. Additionally, we explain the impact of EVs on sperm cryopreservation, offering insights into potential advancements in assisted reproductive technologies of wild animal species. Furthermore, the involvement of EVs in preimplantation embryos elucidates their role in shaping the early stages of embryonic development. Notably, the transmission of EVs from male to female is also highlighted, revealing a potential communication channel crucial for successful reproduction. The impact of EVs on improving assisted reproductive technology (ART) outcomes is also explained, showcasing their potential as a tool for enhancing fertility treatments. Additionally, the role of EVs in infertility is explored, providing valuable insights into potential diagnostic and therapeutic avenues. Overall, this chapter underscores the intricate interplay between EVs and various facets of wild animals' reproductive biology. The future implications of understanding EVs in wild animals' reproduction emphasize the need for continued research and innovation in this field.

Wildlife conservation requires varying degrees of management of endangered species as well as management of their potential predators and competitors. Conservation also depends on ameliorating human-wildlife conflict, especially where there is a threat to the safety of people and of their pets and livestock. In addition, sustainability of wildlife populations can be affected by feral domestic animals or invasive species that require removal or control. With the increasing concern for animal welfare, non-lethal methods of limiting population size and distribution, such as fertility control, are gaining favor. Breeding programs in zoos depend on highly effective and selective contraception to manage sustainable insurance populations. This review covers fertility control methods currently in use, those that have not lived up to past promises, and others that are under development and present hope for addressing remaining challenges.

Computational methods are presented for modeling the catalytic center of an enzyme and calculating the energy associated with given molecular geometry. First, an introduction to general theory is given, including a brief discussion of quantum mechanics (QM), molecular mechanics (MM), and hybrid QM/MM, a standard approach that divides the system into a region requiring a description of the electronic structure (QM) and a remainder that can be considered a perturbation (MM) to the system. Next, the nitrogenase enzyme will be used as a sample system to explain in detail how modeling is carried out. This discussion will review the broken symmetry (BS) approach within DFT, a computational approach that describes the spin states of multiple Fe centers. The review concludes with a discussion of machine learning (ML) and the training of a neural network (NN) potential based on QM calculations.

Introduction: Raising a child with Autism Spectrum Disorder (ASD) poses distinct challenges for the parents. The responsibilities that come with securing ongoing support are often described as daunting by them. Parents need support, guidance, and access to specialists to come to terms with the first diagnosis of ASD and to safely guide their child through the developmental stages into adulthood.

Aim: To investigate the experiences of parents who are raising children diagnosed with ASD in Greece.

Methods: Semi-structured interviews were conducted with eight parents of children with ASD. Interviews were analyzed according to Braun and Clarke's thematic methodology. Qualitative analysis software program ATLAS.TI version 8 was used for data organization and analysis.

Findings: Data analysis resulted in one core theme, as the participants experienced raising their child with ASD as "losing your way, being on a rollercoaster with ups and downs". The core theme comprised of five sub-themes: (a) Experiencing loneliness, isolation, and social stigma, (b) Positive development in the long run and finding solutions to problems, (c) Advocating for their child, being the link, (d) Uncertainty, stress, fear for what the future holds, and (e) Losing themselves, identity crisis.

Conclusions: The parents grappled with feelings of loneliness, isolation, and stigma. Engaging in social interactions with friends and extended family proved particularly challenging. Additionally, they made substantial life adjustments, including changing or even stopping their careers. Nevertheless, despite their many challenges, the children progressed over time. This prompted the parents to devise solutions, be proactive and keep going, for the best interest of their child.

Miscarriage is a naturally occurring event that can be caused by several factors, such as work-related stress. The aim of the current systematic review was to examine the association between work-related stress and miscarriage in pregnant women, and to corroborate previous findings on the subject. A systematic review was conducted using the PubMed and Scopus databases. Observational studies published in English were considered for inclusion. A total of 412 papers were identified through the database search. After removing duplicates, 302 papers were screened, and based on the inclusion and exclusion criteria, seven studies were included in the systematic review. Our results indicate that there is an increased risk of miscarriage among women with work stress. Future research in larger population samples is needed to confirm these findings.

The patient-physician relationship has traditionally been paternalistic, in which the physician made decisions on behalf of the patient, using his or her skills to select the necessary interventions and treatments likely to restore the patient's health. In this context, the information given to the patient is selected in such a way as to encourage him to consent to the decisions of the attending physician. This definition of asymmetric or unbalanced interaction between doctors and patients has begun to be challenged in recent years, with a shift towards a more "complementary" relationship where the patient is more informed, empowered, and autonomous. Shared decision-making has been shown to have a positive impact on health care, as it guides treatment plans that better reflect patient goals, improves patient-physician communication, has a positive effect on health outcomes, and can reduce costs.

To evaluate interventions designed to improve transition to adult-oriented care for youth with chronic physical health problems.

Methods: Electronic searches were conducted in PubMed, Google Scholar, EMBASE, and PsycINFO focusing on patient education and preparation, and their effect on the course and the follow-up of diseases, as well as on the quality of life of young people.

Results: Seventeen studies met inclusion criteria. Educational programs, either hospital-based or Internet-based, and also workshops with a cognitive-behavioral approach seem to reflect positively on transition outcomes.

Conclusions: This systematic review illustrates a map of interventions that enhance a successful transition of young chronic patients to adult health care. The findings suggest that educational programs, behavioral workshops, common medical appointments with pediatric and adult healthcare providers, training of the latter, and patient families are useful to transition experience. Transition programs should be developed with a long-term perspective preparing and empowering youth for the future.