Applying Theory of Planned Behavior to Predict Nurses' Intention and Volunteering to Care for Sars Patients in Southern Taiwan

Severe acute respiratory syndrome (SARS) spread worldwide after an outbreak in Guangdong Province, China, in mid-November 2002. Health care workers were at highest risk of infection. The purpose of this study, which was based on Ajzen's theory of planned behavior (TPB), was to determine the extent to which personal attitudes, subjective norms, and perceived control influence nurses' intention and volunteering to care for SARS patients. After the SARS outbreak, a total of 750 staff nurses (response rate 90%) at one hospital completed a questionnaire assessing their intention to provide care to SARS patients. Overall, 42.7% of nurses had a positive intention to provide care to SARS patients, and 25.4% of nurses would volunteer to care for SARS patients. Four factors explaining 35% of the variance in nurses' intention to care for SARS patients were self-efficacy (β = 0.39, p < 0.001), attitude (β = 0.25, p < 0.001), years of working in the study hospital (β = −0.15, p < 0.001), and receiving resources from the hospital (β = 0.13, p < 0.001). Two factors explaining 15% of the variance in nurses' volunteering to care for SARS patients were intention (β = 0.31, p < 0.001) and attitude (β = 0.15, p < 0.001). The final model shows that the variables of the TPB contributed significantly to the explanation of a portion of variance in nurses' intention and volunteering to care for SARS patients. The results are helpful for human resources managers facing a new contagious disease

Lasting DNA Damage and Aberrant DNA Repair Gene Expression Profile Are Associated with Post-Chronic Cadmium Exposure in Human Bronchial Epithelial Cells

Cadmium (Cd) is a widespread environmental pollutant and carcinogen. Although the exact mechanisms of Cd-induced carcinogenesis remain unclear, previous acute/chronic Cd exposure studies have shown that Cd exerts its cytotoxic and carcinogenic effects through multiple mechanisms, including interference with the DNA repair system. However, the effects of post-chronic Cd exposure remain unknown. Here, we establish a unique post-chronic Cd-exposed human lung cell model (the CR0 cells) and investigate the effects of post-chronic Cd exposure on the DNA repair system. We found that the CR0 cells retained Cd-resistant property even though it was grown in Cd-free culture medium for over a year. The CR0 cells had lasting DNA damage due to reduced DNA repair capacity and an aberrant DNA repair gene expression profile. A total of 12 DNA repair genes associated with post-chronic Cd exposure were identified, and they could be potential biomarkers for identifying post-chronic Cd exposure. Clinical database analysis suggests that some of the DNA repair genes play a role in lung cancer patients with different smoking histories. Generally, CR0 cells were more sensitive to chemotherapeutic (cisplatin, gemcitabine, and vinorelbine tartrate) and DNA damaging (H2O2) agents, which may represent a double-edged sword for cancer prevention and treatment. Overall, we demonstrated for the first time that the effects of post-chronic Cd exposure on human lung cells are long-lasting and different from that of acute and chronic exposures. Findings from our study unveiled a new perspective on Cd-induced carcinogenesis-the post-chronic exposure of Cd. This study encourages the field of post-exposure research which is crucial but has long been ignored

Omega‐3 fatty acids protect from colitis via an Alox15‐derived eicosanoid

An increased omega-3 polyunsaturated fatty acid (n-3 PUFA) tissue status can lead to a significant formation of anti-inflammatory lipid mediators and effective reduction in inflammation and tissue injury in murine colitis. Arachidonic acid lipoxygenases (ALOX) have been implicated in the pathogenesis of inflammatory bowel disease as well as in the formation of pro- and anti-inflammatory lipid mediators. To explore the role of Alox15 in the protective response found in fat1 transgenic mice with endogenously increased n-3 PUFA tissue status fat1 transgenic mice were crossed with Alox15-deficient animals and challenged in the dextran sulfate sodium (DSS)- and the 2,4,6-trinitrobenzene sulphonic acid (TNBS)-induced colitis model. Transgenic fat1 mice rich in endogenous n-3 PUFAs were protected from colitis. However, additional systemic inactivation of the Alox15 gene counteracted this protective effect. To explore the molecular basis for this effect Alox15 lipid metabolites derived from n-3 PUFA were analyzed in the different mice. Alox15 deficiency suppressed the formation of n-3 PUFA-derived 15-hydroxy eicosapentaenoic acid (15-HEPE). In contrast, treating mice with intraperitoneal injections of 15S-HEPE protected wild-type mice from DSS- and TNBS-induced colitis. These data suggest that the anti-colitis effect of increased n-3 PUFA in the transgenic fat1 mouse model is mediated in part via Alox15-derived 15-HEPE formation

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

Asherman syndrome--one century later

Objective: To provide an update on the current knowledge of Asherman syndrome. Design: Literature review. Setting: The worldwide reports of this disease. Patient(s): Patients with Asherman syndrome who presented with amenorrhea or hypomenorrhea, infertility, or recurrent pregnancy loss. Intervention(s):Hysteroscopy and hysteroscopic surgery have been the gold standard of diagnosis and treatment respectively for this condition. Main outcome measure(s):The etiology, pathology, symptomatology, diagnosis, treatment, and reproductive outcomes were analyzed. Result(s): This syndrome occurs mainly as a result of trauma to the gravid uterine cavity, which leads to the formation of intrauterine and/or intracervical adhesions. Despite the advances in hysteroscopic surgery, the treatment of moderate to severe Asherman syndrome still presents a challenge. Furthermore, pregnancy after treatment remains high risk with complications including spontaneous abortion, preterm delivery, intrauterine growth restriction, placenta accrete or praevia, or even uterine rupture. Conclusion(s): The management of moderate to severe disease still poses a challenge, and the prognosis of severe disease remains poor. Close antenatal surveillance and monitoring are necessary for women who conceive after treatment.<br/

Impact of transcervical resection of endometrium on uterine and ovarian haemodynamics

This study prospectively evaluated the impact of transcervical resection of endometrium (TCRE) on uterine and ovarian haemodynamics. The study group comprised 35 women with abnormal (excessive) uterine bleeding who underwent TCRE. The patients were examined by transvaginal colour Doppler ultrasonography 1-4 days prior to operation, and then 1, 3, 6 and 12 months post-operatively, to measure resistance index (RI) and pulsatility index from uterine, arcuate, radial and ovarian arteries. Thirty-five patients were followed up for 1 year after TCRE. Thirty (85.7%) patients had adequately controlled menorrhagia as defined by the patients subjectively. Nine (25.7%) patients had amenorrhoea, 21 (60%) patients had hypomenorrhoea and five (14.3%) patients had lighter periods initially but the menorrhagia recurred within 1 year after the operation. However, patients who had relapse of menorrhagia at 1 year after TCRE had a lower RI at all levels of uterine arteries compared with those who had persistent improvement. The data suggest that patients who had TCRE per se did not have associated altered uterine and ovarian haemodynamics; however, compared with those who had persistent improvement, those who had relapse in symptoms had an associated lower RI (P &lt; or = 0.01) after TCRE at all levels of uterine arteries