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عبارات \غامضة\ عن الصين : مقالات في الجغرافيا البشرية
هذا الكتاب هو الجزء الأول من سلسلة كتب \"الحكمة الصينية\" ويأتي تحت عنوان (عبارات \"غامضة\" عن الصين : مقالات في الجغرافيا البشرية)، وجمع بين دفتيه ما مجموعة أربعة عشر مصطلحا متعلقا بالجغرافيا البشرية، ومن بينها \"الأقاليم التسعة\"، \"العالم\"، \"النهر الأصفر\"، \"سور الصين العظيم\"، \"المدينة\"، \"و\"العاصمة\"، وغيرها، ويتمثل الغرض الرئيسي للكتاب في تعريف الأطفال بالجغرافيا الصينية التقليدية، وتعميم معارف الجغرافيا البشرية في نفس الوقت، وهو الأمر الذي يترك الأطفال يستكشفون المعنى الثقافي وراء المصطلحات والمفردات الشائعة.
Book
A case of primary cutaneous Cryptococcus neoformans infection
Background
Cryptococcosis is an infectious disease caused by encapsulated heterobasidiomycete yeasts. As an opportunistic pathogen, cryptococcal inhalation infection is the most common. While Primary cutaneous cryptococcosis is extremely uncommon.
Case presentation
A 61-year-old woman with a history of rheumatoid arthritis on long-term prednisone developed a red plaque on her left thigh. Despite initial antibiotic treatment, the erythema worsened, leading to rupture and fever. Microbiological analysis of the lesion’s secretion revealed
Candida albicans
,
Pseudomonas aeruginosa
, and
methicillin-resistant Staphylococcus epidermidis
. Skin biopsy showed thick-walled spores, and culture confirmed primary cutaneous infection with
Cryptococcus neoformans
. Histopathological stains were positive, and mass spectrometry identified serotype A of the pathogen. The patient was treated with oral fluconazole and topical nystatin, resulting in significant improvement and near-complete healing of the skin lesion within 2.5 months.
Conclusions
Primary cutaneous cryptococcosis was a primary skin infection exclusively located on the skin. It has no typical clinical manifestation of cutaneous infection of Cryptococcus, and culture and histopathology remain the gold standard for diagnosing. The recommended medication for Primary cutaneous cryptococcosis is fluconazole. When patients at risk for opportunistic infections develop skin ulcers that are unresponsive to antibiotic, the possibility of primary cutaneous cryptococcosis needs to be considered.
Journal Article
Do media stories about medical workers’ arduousness scare medical students? Insights from a cross-sectional study
Background
Under the combined influence of the aftermath of the epidemic and aging, the shortage of health workforce has become increasingly serious across the globe, posing constraints to the achievement of Universal Health Coverage. Improving the professional identity of medical students can ensure a steady supply of potential medical workers, which can mitigate the shortage of medical workers. This study focuses on sad news about medical workers’ arduousness, a dominant news type in public crises, and examines how it affects medical students’ professional identity, which is regarded to be important in the development of medical education and public health.
Methods
This study employed a paper-and-pencil survey and recruited 1441 medical students in a Chinese university. Structural equation modeling (SEM) analysis with SmartPLS 3.0 was used to analyze the data.
Results
The results reveal that media stories have multi-layered impacts on medical students’ professional identity. Their exposure of sad news about medical workers’ arduousness not only has direct impacts on professional identity, but also exerts indirect impacts via the provision of online emotional support.
Conclusion
This study has both theoretical and practical implications. In theory, the findings highlight the importance of media stories in the construction of professional identity and propose a theoretical framework for explaining the impacts of sad news exposure. In practice, this study contributes to the improvement of medical education, hospital management and public health governance in the digital age.
Journal Article
ميلاد القرد
ذهب سان تسانغ وتلاميذه إلى جبل شيتوه، وتنكر الوزير جين شينغ في هيئة رجل مسن وحذرهم من الشياطين الثلاثة، فذهب وو كونغ يتقصى الأمر، ودعا با جبه ليذهبا للقتال فابتلعهما الشيطان الأسد، انتهز القرد وو كونغ الفرصة لربط حبل في بطن الوحش الذي تألم كثيرا. لم يرض الشيطان الفيل والأمر، وطلب من القرد القتال وهزم أيضا، فاضطر للموافقة على عبور الراهب سان تسانغ الجبل على محفة فكر الشيطان النسر في خطة جديدة، ودارت معاركة كبيرة، أسر فيها المعلم وتلاميذه. لكن القرد استطاع الهرب، وذهب إلى جبل الأرواح لدعوة الحكيم الأكبر. وبمساعدته نجحوا في إخضاع الشيطان الأسد والشيطان الفيل وحولوهما إلى أسد وفيل، ثم أخضعوا الشيطان النسر وواصلوا رحلتهم إلى الغرب.
Book
Impact of Concurrent Media Exposure on Professional Identity: Cross-Sectional Study of 1087 Medical Students During Long COVID
Long COVID has widened the health gap across society and highlighted the vulnerabilities and risks faced by health care systems. For instance, the global trend of medical workers resigning has become a prominent topic on social media. In response to this severe social problem in global public health within the digital society, it is urgent to investigate how the professional identity of medical students, who are digital natives and the future workforce of medical practitioners, is affected by the media environment.
This study aims to examine how media exposure relates to medical students' perceptions of informational and emotional support, and how these perceptions further influence the development of their professional identity.
Building on the Stimulus-Organism-Response (SOR) framework, this study develops a theoretical model to illustrate how media exposure affects medical students' professional identity through the mediation of social support. Specifically, media exposure was assessed through online news media and social media exposure; social support was evaluated in terms of informational and emotional support; and professional identity was measured through medical students' sense of belonging and professional commitment. A survey was conducted at a medical school in China, yielding 1087 valid responses that were analyzed using SmartPLS 4.0.
Consistent with our expectations, online news media exposure was positively associated with both informational support (β=.163; P<.001) and emotional support (β=.084; P=.007). Similarly, social media exposure showed positive associations with informational support (β=.122; P<.001) and emotional support (β=.235; P<.001). Thereafter, informational support (β=.228; P<.001) and emotional support (β=.344; P<.001) were positively associated with students' sense of belonging. Meanwhile, both informational support (β=.245; P<.001) and emotional support (β=.412; P<.001) positively impacted medical students' professional commitment. In addition, a mediation test was conducted. The results confirmed that informational support and emotional support partially mediated the effect of online news media, while fully mediating the effect of social media on medical students' sense of belonging and professional commitment.
This study finds that exposure to online news media and social media can enhance medical students' sense of belonging and professional commitment through the formation of informational and emotional support. It expands the discussion on the role of media in providing social support and facilitating the development of medical students' professional identity. This is a valuable contribution to addressing complex public health crises through effective media governance in the network era.
Journal Article
A Hypoxia Gene-Based Signature to Predict the Survival and Affect the Tumor Immune Microenvironment of Osteosarcoma in Children
Osteosarcoma is a quickly developing, malignant cancer of the bone, which is associated with a bad prognosis. In osteosarcoma, hypoxia promotes the malignant phenotype, which results in a cascade of immunosuppressive processes, poor prognosis, and a high risk of metastasis. Nonetheless, additional methodologies for the study of hyperoxia in the tumor microenvironment also need more analysis. We obtained 88 children patients with osteosarcoma from the Therapeutically Applicable Research to Generate Effective Treatment (TARGET) database and 53 children patients with RNA sequence and clinicopathological data from the Gene Expression Omnibus (GEO). We developed a four-gene signature related to hypoxia to reflect the immune microenvironment in osteosarcoma that predicts survival. A high-risk score indicated a poor prognosis and immunosuppressive microenvironment. The presence of the four-gene signature related to hypoxia was correlated with clinical and molecular features and was an important prognostic predictor for pediatric osteosarcoma patients. In summary, we established and validated a four-gene signature related to hypoxia to forecast recovery and presented an independent prognostic predictor representing overall immune response strength within the osteosarcoma microenvironment.
Journal Article
Acute pancreatitis in intraductal papillary mucinous neoplasm: a single-center retrospective cohort study with systematic review and meta-analysis
Background
Intraductal papillary mucinous neoplasm (IPMN) is a cystic tumor of the pancreas arising from abnormal papillary proliferation of ductal epithelial cells, and is a precancerous lesion of pancreatic malignancy. This study aimed to evaluate associations between acute pancreatitis (AP) and histologic subtypes of IPMN.
Methods
In the clinical study, patients with IPMN confirmed by surgical resection specimens at our institute between 2009 and 2021 were eligible for inclusion. Associations and predictive accuracy of AP on the presence of HGD were determined by logistic regressions. In addition, a systematic review and meta-analysis was conducted through literatures upon search in PubMed, Embase, CENTRAL, China National Knowledge Infrastructure (CKNI), and Wanfang database, up to June, 2023. Pooled effects of the associations between AP and HGD and intestinal epithelial subtype subtype, shown as odds ratios (ORs) with 95% confidence intervals (CIs), were calculated using random effects model.
Results
The retrospective cohort study included 47 patients (32 males, 15 females) diagnosed with IPMN at our center between 2009 and 2021, including 11 cases with AP (median 62 years) and 36 cases (median 64.5 years) without. Accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of AP in predicting HGD were 78.7%, 57.1%, 82.5%, 36.4%, and 91.7%, respectively. Univariate logistic regression analysis showed that AP group had greater odds of presence of HGD (OR: 6.29,95% CI: 1.14–34.57) than non-AP group. Meta-analysis of five case-control studies in the literature included 930 patients and showed that AP-IPMN patients had higher odds for HGD (OR: 2.13, 95% CI 1.38–3.29) and intestinal epithelial subtype (OR: 5.38, 95% CI: 3.50–8.27) compared to non-AP IPMN.
Conclusions
AP is predictive of malignancy in patients with IPMN.
Journal Article
Galectin-3 promotes Aβ oligomerization and Aβ toxicity in a mouse model of Alzheimer’s disease
Amyloid-β (Aβ) oligomers largely initiate the cascade underlying the pathology of Alzheimer’s disease (AD). Galectin-3 (Gal-3), which is a member of the galectin protein family, promotes inflammatory responses and enhances the homotypic aggregation of cancer cells. Here, we examined the role and action mechanism of Gal-3 in Aβ oligomerization and Aβ toxicities. Wild-type (WT) and Gal-3-knockout (KO) mice, APP/PS1;WT mice, APP/PS1;Gal-3+/− mice and brain tissues from normal subjects and AD patients were used. We found that Aβ oligomerization is reduced in Gal-3 KO mice injected with Aβ, whereas overexpression of Gal-3 enhances Aβ oligomerization in the hippocampi of Aβ-injected mice. Gal-3 expression shows an age-dependent increase that parallels endogenous Aβ oligomerization in APP/PS1 mice. Moreover, Aβ oligomerization, Iba1 expression, GFAP expression and amyloid plaque accumulation are reduced in APP/PS1;Gal-3+/− mice compared with APP/PS1;WT mice. APP/PS1;Gal-3+/− mice also show better acquisition and retention performance compared to APP/PS1;WT mice. In studying the mechanism underlying Gal-3-promoted Aβ oligomerization, we found that Gal-3 primarily co-localizes with Iba1, and that microglia-secreted Gal-3 directly interacts with Aβ. Gal-3 also interacts with triggering receptor expressed on myeloid cells-2, which then mediates the ability of Gal-3 to activate microglia for further Gal-3 expression. Immunohistochemical analyses show that the distribution of Gal-3 overlaps with that of endogenous Aβ in APP/PS1 mice and partially overlaps with that of amyloid plaque. Moreover, the expression of the Aβ-degrading enzyme, neprilysin, is increased in Gal-3 KO mice and this is associated with enhanced integrin-mediated signaling. Consistently, Gal-3 expression is also increased in the frontal lobe of AD patients, in parallel with Aβ oligomerization. Because Gal-3 expression is dramatically increased as early as 3 months of age in APP/PS1 mice and anti-Aβ oligomerization is believed to protect against Aβ toxicity, Gal-3 could be considered a novel therapeutic target in efforts to combat AD.
Journal Article
Superconductivity in the PbO-type structure α-FeSe
The recent discovery of superconductivity with relatively high transition temperature (Tc) in the layered iron-based quaternary oxypnictides La[O₁₋xFx] FeAs by Kamihara et al. [Kamihara Y, Watanabe T, Hirano M, Hosono H (2008) Iron-based layered superconductor La[O1-xFx] FeAs (x = 0.05-0.12) with Tc = 26 K. J Am Chem Soc 130:3296-3297.] was a real surprise and has generated tremendous interest. Although superconductivity exists in alloy that contains the element Fe, LaOMPn (with M = Fe, Ni; and Pn = P and As) is the first system where Fe plays the key role to the occurrence of superconductivity. LaOMPn has a layered crystal structure with an Fe-based plane. It is quite natural to search whether there exists other Fe based planar compounds that exhibit superconductivity. Here, we report the observation of superconductivity with zero-resistance transition temperature at 8 K in the PbO-type α-FeSe compound. A key observation is that the clean superconducting phase exists only in those samples prepared with intentional Se deficiency. FeSe, compared with LaOFeAs, is less toxic and much easier to handle. What is truly striking is that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides. Therefore, this result provides an opportunity to better understand the underlying mechanism of superconductivity in this class of unconventional superconductors.
Journal Article