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https://www.readbyqxmd.com/read/29334412/stallion-semen-quality-depends-on-mhc-matching-to-teaser-mare
#1
E Jeannerat, E Marti, C Berney, F Janett, H Bollwein, H Sieme, D Burger, C Wedekind
The major histocompatibility complex (MHC) has repeatedly been found to influence mate choice of vertebrates, with MHC-dissimilar mates typically being preferred over MHC-similar mates. We used horses (Equus caballus) to test whether MHC matching also affects male investment into ejaculates after short exposure to a female. Semen characteristics varied much among stallions. Controlling for this variance with a full-factorial within-subject experimental design, we found that a short exposure to an MHC-dissimilar mare enhanced male plasma testosterone and led to ejaculates with elevated sperm numbers as compared to exposure to an MHC-similar mare...
January 15, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29332500/microstructure-and-mechanical-properties-of-porous-titanium-structures-fabricated-by-electron-beam-melting-for-cranial-implants
#2
Khaja Moiduddin
The traditional methods of metallic bone implants are often dense and suffer from adverse reactions, biomechanical mismatch and lack of adequate space for new bone tissue to grow into the implant. The objective of this study is to evaluate the customized porous cranial implant with mechanical properties closer to that of bone and to improve the aesthetic outcome in cranial surgery with precision fitting for a better quality of life. Two custom cranial implants (bulk and porous) are digitally designed based on the Digital Imaging and Communications in Medicine files and fabricated using additive manufacturing...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29331974/what-are-the-physical-and-psychological-health-effects-of-suicide-bereavement-on-family-members-an-observational-and-interview-mixed-methods-study-in-ireland
#3
Ailbhe Spillane, Karen Matvienko-Sikar, Celine Larkin, Paul Corcoran, Ella Arensman
OBJECTIVES: Research focussing on the impact of suicide bereavement on family members' physical and psychological health is scarce. The aim of this study was to examine how family members have been physically and psychologically affected following suicide bereavement. A secondary objective of the study was to describe the needs of family members bereaved by suicide. DESIGN: A mixed-methods study was conducted, using qualitative semistructured interviews and additional quantitative self-report measures of depression, anxiety and stress (DASS-21)...
January 13, 2018: BMJ Open
https://www.readbyqxmd.com/read/29331429/paper-based-fluorescent-sensor-via-aggregation-induced-emission-fluorogen-for-facile-and-sensitive-visual-detection-of-hydrogen-peroxide-and-glucose
#4
Jiafu Chang, Haiyin Li, Ting Hou, Wenna Duan, Feng Li
Hydrogen peroxide (H2O2), an important reactive oxygen species (ROS), is related to the oxidative stress in organisms, and plays important roles in a variety of cellular activities as well. So it is of crucial importance to develop sensitive and accurate sensing strategies to detect H2O2 in biological systems. Herein, by taking advantage of the unique emission characteristics of aggregation induced emission (AIE) fluorogens, we proposed a non-enzymatic fluorescence platform for facile and sensitive detection of H2O2, both in solution state using fluorescence spectrometer and on paper-based sensor via visual inspection...
January 6, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29328456/p21-protects-cardiomyocytes-against-ischemia-reperfusion-injury-by-inhibiting-oxidative-stress
#5
Hong Li, Tong Zou, Shuai Meng, Yun-Zhu Peng, Jie-Fu Yang
Ischemic heart disease is a major health threat, resulting in a large number of mortalities annually worldwide. Oxidative stress is one of the main causes of cell death during ischemia‑reperfusion (IR) injury. Cyclin dependent kinase inhibitor 1A (known as p21) is important in protecting tissues against IR injury, however the mechanism remains unknown. In the present study, oxygen‑glucose deprivation and subsequent reoxygenation (OGD/R) in H9c2 heart‑derived myocytes was used as a model to study myocardial IR injury in vitro...
January 5, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29325481/stress-management-and-the-role-of-rhodiola-rosea-a-review
#6
Ion-George Anghelescu, David Edwards, Erich Seifritz, Siegfried Kasper
OBJECTIVE: Stress describes the physiological reaction to threat or pressure, which manifests as physical symptoms of exhaustion or energy loss and psychological symptoms, including irritability or tension. If untreated, chronic stress or burnout may develop, both are areas of unmet medical need. Evidence-based treatment and prevention measures are needed. METHODS: Prevention strategies and existing treatment options for stress-related symptoms were evaluated to establish criteria for an adequate pharmacological approach to stress...
January 11, 2018: International Journal of Psychiatry in Clinical Practice
https://www.readbyqxmd.com/read/29324932/the-neurophysiological-and-evolutionary-considerations-of-close-combat-a-modular-approach
#7
Kostas Dervenis, Evangelos Tsialogiannis
Close Combat may be identified as a physical confrontation involving armed or unarmed fighting, lethal and/or non-lethal methods, or even simply escape from and/or de-escalation of the confrontation. Our model hypothesizes that distinct areas of the brain are utilized for specific levels of violence, based on evolutionary criteria, and that these levels of violence bring into effect distinct physiological criteria and kinesiology. This model is outlined similar to Paul D. MacLean's triune brain theory, but incorporates distinct processes inherent to the autonomic nervous system (i...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29324685/novel-spectroscopic-and-electrochemical-sensors-and-nanoprobes-for-the-characterization-of-food-and-biological-antioxidants
#8
REVIEW
Reşat Apak, Sema Demirci Çekiç, Ayşem Üzer, Saliha Esin Çelik, Mustafa Bener, Burcu Bekdeşer, Ziya Can, Şener Sağlam, Ayşe Nur Önem, Erol Erçağ
Since an unbalanced excess of reactive oxygen/nitrogen species (ROS/RNS) causes various diseases, determination of antioxidants that can counter oxidative stress is important in food and biological analyses. Optical/electrochemical nanosensors have attracted attention in antioxidant activity (AOA) assessment because of their increased sensitivity and selectivity. Optical sensors offer advantages such as low cost, flexibility, remote control, speed, miniaturization and on-site/in situ analysis. Electrochemical sensors using noble metal nanoparticles on modified electrodes better catalyze bioelectrochemical reactions...
January 11, 2018: Sensors
https://www.readbyqxmd.com/read/29323524/work-disability-in-soldiers-with-posttraumatic-stress-disorder-posttraumatic-embitterment-disorder-and-not-event-related-common-mental-disorders
#9
Beate Muschalla, Heinrich Rau, Gerd Dieter Willmund, Christine Knaevelsrud
OBJECTIVE: Posttraumatic mental disorders may occur with different affect qualities. Best known is posttraumatic stress disorder (PTSD), a conditioned anxiety reaction with intrusions. Another event-related mental disorder is posttraumatic embitterment (PTED), characterized by affect of embitterment and thoughts of revenge, occurring after an event deeply hurting basic beliefs. Knowing about associated disability is important for treatment and sociomedical decisions. This is the first study to explore work-disability in patients with PTSD, PTED, and not-event-related common mental disorder (CMD)...
January 2018: Psychological Trauma: Theory, Research, Practice and Policy
https://www.readbyqxmd.com/read/29323522/demoralization-and-embitterment
#10
Maria Giulia Nanni, Rosangela Caruso, Silvana Sabato, Luigi Grassi
OBJECTIVE: Individuals may experience a wide range of psychological reactions in response to negative life events. Even if events that threaten life have been always played a central role in research, recent studies have outlined that experiences, considered exceptional but part of the human existence (e.g., divorce, unemployment, or chronic illness) may also lead individuals to experience enduring emotional states of suffering. Demoralization has been substantially described as an important condition occurring in response to stressful events, while a recent interest is growing on embitterment as a common reaction...
January 2018: Psychological Trauma: Theory, Research, Practice and Policy
https://www.readbyqxmd.com/read/29322335/mechanobiological-modeling-of-endochondral-ossification-an-experimental-and-computational-analysis
#11
J J Vaca-González, M Moncayo-Donoso, J M Guevara, Y Hata, S J Shefelbine, D A Garzón-Alvarado
Long bone formation starts early during embryonic development through a process known as endochondral ossification. This is a highly regulated mechanism that involves several mechanical and biochemical factors. Because long bone development is an extremely complex process, it is unclear how biochemical regulation is affected when dynamic loads are applied, and also how the combination of mechanical and biochemical factors affect the shape acquired by the bone during early development. In this study, we develop a mechanobiological model combining: (1) a reaction-diffusion system to describe the biochemical process and (2) a poroelastic model to determine the stresses and fluid flow due to loading...
January 10, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29321492/quantification-of-silver-nanoparticle-toxicity-to-algae-in-soil-via-photosynthetic-and-flow-cytometric-analyses
#12
Sun-Hwa Nam, Jin Il Kwak, Youn-Joo An
Soil algae, which have received attention for their use in a novel bioassay to evaluate soil toxicity, expand the range of terrestrial test species. However, there is no information regarding the toxicity of nanomaterials to soil algae. Thus, we evaluated the effects of silver nanoparticles (0-50 mg AgNPs/kg dry weight soil) on the soil alga Chlamydomonas reinhardtii after six days, and assessed changes in biomass, photosynthetic activity, cellular morphology, membrane permeability, esterase activity, and oxidative stress...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320982/global-identification-structural-analysis-and-expression-characterization-of-cytochrome-p450-monooxygenase-superfamily-in-rice
#13
Kaifa Wei, Huiqin Chen
BACKGROUND: The cytochrome P450 monooxygenases (CYP450, CYP, P450) catalyze numerous monooxygenation/hydroxylation reactions in biochemical pathways. Although CYP superfamily has been systematically studied in a few species, the genome-scale research about it in rice has not been done. RESULTS: In this study, a total of 355 CYPs encoded by 326 genes were identified in japonica genome. The OsCYP genes are classified into 10 clans including 45 families according to phylogenetic analysis...
January 10, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29319713/adaptable-liquid-crystal-elastomers-with-transesterification-based-bond-exchange-reactions
#14
Drew W Hanzon, Nicholas A Traugutt, Matthew K McBride, Christopher N Bowman, Christopher M Yakacki, Kai Yu
Adaptable liquid crystal elastomers (LCEs) have recently emerged to provide a new and robust method to program monodomain LCE samples. When a constant stress is applied with active bond exchange reactions (BERs), polymer chains and mesogens gradually align in the strain direction. Mesogen alignment is maintained after removing the BER stimulus (e.g. by lowering the temperature) and the programmed LCE samples exhibit free-standing two-way shape switching behavior. Here, a new adaptable main-chain LCE system was developed with thermally induced transesterification BERs...
January 10, 2018: Soft Matter
https://www.readbyqxmd.com/read/29319388/woohwangcheongsimwon-prevents-high-fat-diet-induced-memory-deficits-and-induces-sirt1-in-mice
#15
Hyunwoo Park, Mia Kim, Im-Joon Shin, Jonghee Park, Soo Yong Bang, Chunsik Yi, Myoung-Ae Kim, Jae-Hwan Lew, Joo Won Suh, Sungho Maeng
Woohwangcheongsimwon (WHC) is a mixture of herbal medicines that is widely prescribed in Korean traditional medicine. SIRT1 is known for its regulatory roles in energy metabolism, oxidative stress, and circadian rhythms. This study was designed to determine whether WHC can increase and mimic the biological reactions of SIRT1 activation. Ten-month-old male mice were divided into four groups: nontreated normal diet (ND), nontreated high-fat diet (HFD), WHC-treated ND, and WHC-treated HFD. Body weight and cognitive functions were evaluated after treatment...
January 10, 2018: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29317238/gender-differences-in-mrna-expression-of-aquaporin-8-and-glutathione-peroxidase-in-cataractous-lens-following-intake-of-an-antioxidant-supplement
#16
Rijo Hayashi, Shimmin Hayashi, Miki Sakai, Kiyomi Arai, Makoto Chikuda, Shigeki Machida
Antioxidants can decrease oxidative damage and prevent age-related ocular disease. Our previous investigation on human aqueous humor following intake of a lutein-containing antioxidant supplement reported an increase in the scavenging activity of superoxide in both genders and an increase in the amount of hydrogen peroxide (H2O2) in females. Aquaporin 8 (AQP8) is a diffusion facilitator of H2O2 and glutathione peroxidase (Gpx) is a H2O2 scavenging enzyme. The correlation between AQP8 and Gpx may be the key to determining how oxidative stress in the aqueous humor affects the lens after intake of antioxidant supplements...
January 6, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29316709/screaming-body-and-silent-healthcare-providers-a-case-study-with-a-childhood-sexual-abuse-survivor
#17
REVIEW
Sigrun Sigurdardottir, Sigridur Halldorsdottir
Stressful early life experiences cause immune dysregulation across the lifespan. Despite the fact that studies have identified childhood sexual abuse (CSA) survivors as a particularly vulnerable group, only a few attempts have been made to study their lived-experience of the physical health consequences of CSA. The aim of this study was to explore a female CSA survivor's lived-experience of the physical health consequences of CSA and how she experienced the reactions of healthcare providers. Seven interviews were conducted with this 40-year-old woman, Anne, using a phenomenological research approach...
January 8, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29316223/probiotic-lactobacillus-sp-inhibit-growth-biofilm-formation-and-gene-expression-of-caries-inducing-streptococcus-mutans
#18
Reham Wasfi, Ola A Abd El-Rahman, Mai M Zafer, Hossam M Ashour
Streptococcus mutans contributes significantly to dental caries, which arises from homoeostasic imbalance between host and microbiota. We hypothesized that Lactobacillus sp. inhibits growth, biofilm formation and gene expression of Streptococcus mutans. Antibacterial (agar diffusion method) and antibiofilm (crystal violet assay) characteristics of probiotic Lacobacillus sp. against Streptococcus mutans (ATCC 25175) were evaluated. We investigated whether Lacobacillus casei (ATCC 393), Lactobacillus reuteri (ATCC 23272), Lactobacillus plantarum (ATCC 14917) or Lactobacillus salivarius (ATCC 11741) inhibit expression of Streptococcus mutans genes involved in biofilm formation, quorum sensing or stress survival using quantitative real-time polymerase chain reaction (qPCR)...
January 8, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29315737/the-dissociative-post-traumatic-stress-disorder-ptsd-subtype-a-treatment-outcome-cohort-study-in-veterans-with-ptsd
#19
Joris F G Haagen, Allison van Rijn, Jeroen W Knipscheer, Niels van der Aa, Rolf J Kleber
OBJECTIVES: Dissociation is a prevalent phenomenon among veterans with post-traumatic stress disorder (PTSD) that may interfere with the effectiveness of treatment. This study aimed to replicate findings of a dissociative PTSD subtype, to identify corresponding patterns in coping style, symptom type, and symptom severity, and to investigate its impact on post-traumatic symptom improvement. METHODS: Latent profile analysis (LPA) was applied to baseline data from 330 predominantly (97%) male treatment-seeking veterans (mean age 39...
January 7, 2018: British Journal of Clinical Psychology
https://www.readbyqxmd.com/read/29315650/levels-of-oxidative-stress-biomarkers-and-bone-resorption-regulators-in-apical-periodontitis-lesions-infected-by-epstein-barr-virus
#20
A Jakovljevic, M Andric, N Nikolic, V Coric, S Krezovic, J Carkic, A Knezevic, K Beljic-Ivanovic, M Plješa-Ercegovac, M Miletić, I Soldatovic, T Radosavljevic, T Jovanovic, T Simic, V Ivanovic, J Milasin
AIM: To investigate whether apical periodontitis lesions infected by Epstein-Barr virus (EBV) exhibit higher levels of oxidative stress biomarkers (8-hydroxydeoxyguanosine (8-OHdG) and oxidized glutathione (GSSG)) and bone resorption regulators (receptor activator of nuclear factor (NF-κB) ligand (RANKL) and osteoprotegerin (OPG)) compared to EBV negative periapical lesions and healthy pulp tissues. METHODOLOGY: The experimental group consisted of 30 EBV positive and 30 EBV negative periapical lesions collected in conjunction with apicoectomy...
January 9, 2018: International Endodontic Journal
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