A decline in mucosal vascularity is a histological hallmark of oral submucous fibrosis(OSF),a premalignant disease that is largely induced by betel quid chewing.However,the lack of available models has challenged studies of angiogenesis in OSF.Here,we found that the expression of thrombospondin 1(THBS1),an endogenous angiostatic protein,was elevated in the stroma of tissues with OSF.Using a fibroblast-attached organoid(FAO)model,the overexpression of THBS1 in OSF was stably recapitulated in vitro.In the FAO model,treatment with arecoline,a major pathogenic component in areca nuts,enhanced the secretion of transforming growth factor(TGF)-β1 by epithelial cells,which then promoted the expression of THBS1 in fibroblasts.Furthermore,human umbilical vein endothelial cells(HUVECs)were incorporated into the FAO to mimic the vascularized component.Overexpression of THBS1 in fibroblasts drastically suppressed the sprouting ability of endothelial cells in vascularized FAOs(vFAOs).Consistently,treatment with arecoline reduced the expression of CD31 in vFAOs,and this effect was attenuated when the endothelial cells were preincubated with neutralizing antibody of CD36,a receptor of THBS1.Finally,in an arecoline-induced rat OSF model,THBS1 inhibition alleviated collagen deposition and the decline in vascularity in vivo.Overall,we exploited an assembled organoid model to study OSF pathogenesis and provide a rationale for targeting THBS1.

This paper takes the teaching of pathogeny biology and clinical laboratory diagnostics for postgraduates in Shandong Second Medical University as examples. By constructing innovative thinking in scientific research, training research innovation skills, and establishing modular, multi-evaluation systems, a comprehensive training mode for scientific research and innovation ability of medical academic postgraduate students had been proposed, and the implementation and effects of this training mode were thoroughly explored. This mode is expected to bring a positive impact on the training of medical postgraduate students and improve their scientific research and innovation ability, thereby promoting the cultivation of more medical talents with a high degree of scientific research and innovation ability.

Currently, the teaching work for postgraduates mainly centers on specific disciplines, and there is a lack of effective connection between disciplines, which leads to the insufficient ability of postgraduates in effectively integrating and applying the knowledge of various disciplines and restricts the development of innovation ability. This paper proposes a program for the cultivation of innovation ability of postgraduate students in clinical laboratory diagnostics based on multi-disciplinary integration from the three aspects of curriculum setting, multi-disciplinary interactive platform construction, and tutor team construction, aiming at helping postgraduate students to enhance the ability of knowledge integration and application and form a comprehensive disciplinary perspective. Additionally, the paper explores the practical application and effect of the cultivation program, offering novel insights and approaches for talent cultivation in the realm of clinical laboratory diagnostics.

Objective:To explore the application status, research hotspots and frontiers of blended teaching mode in undergraduate nursing education at home and abroad, so as to provide reference for related research.Methods:In Chinese, CNKI, Wanfang Database and VIP, and in English, Web of Science database were used as search sources. CiteSpace was used to conduct a quantitative analysis of the retrieved literatures published from 2008 to 2022.Results:A total of 43 literatures in Chinese and 83 in English were retrieved, and the number of publications showed an overall increasing trend. The research hotspots in China focused on education reform, online learning and curriculum system evaluation, and the research frontiers were network teaching, moral education and humanistic care. Foreign research focused on the choice of education model and emphasizes interaction, and the research frontier were to carry out innovative blended teaching and pay attention to the learning experience and learning environment construction of nursing students.Conclusions:In the future, blended teaching should pay attention to carrying out innovative research and dynamic evaluation and feedback of students' satisfaction. In particular, it is necessary to strengthen the cultivation of blended learning competence among nursing teachers, aiming to promote the knowledge and skills of nursing students, and continuously optimize and innovate the application of blended learning in the field of undergraduate nursing education.

The oral and maxillofacial region comprises a variety of organs made up of multiple soft and hard tissue, which are anatomically vulnerable to the pathogenic factors of trauma, inflammation, and cancer. The studies of this intricate entity have been long-termly challenged by a lack of versatile preclinical models. Recently, the advancements in the organoid industry have provided novel strategies to break through this dilemma. Here, we summarize the existing biological and engineering approaches that were employed to generate oral and maxillofacial organoids. Then, we detail the use of modified co-culture methods, such as cell cluster co-inoculation and air-liquid interface culture technology to reconstitute the vascular network and immune microenvironment in assembled organoids. We further retrospect the existing oral and maxillofacial assembled organoids and their potential to recapitulate the homeostasis in parental tissues such as tooth, salivary gland, and mucosa. Finally, we discuss how the next-generation organoids may benefit to regenerative and precision medicine for treatment of oral-maxillofacial illness.
Organoids ; Humans ; Tissue Engineering/methods* ; Coculture Techniques ; Regenerative Medicine ; Mouth

Objective To investigate the changes in the expression levels of miR-21 and its regulatory proteins in bone tissues of osteoporotic mouse model, and its correlation with bone mineral density. Methods Thirty ovariectomized (ovx) female mice were randomly divided into six groups according to different observation time (0 week, 1 week, 2 weeks, 4 weeks, 6 weeks, and 8 weeks, respectively). Smad7 expression level in the tissues of the distal femur of these mice was immunohistochemically analyzed. Real time PCR was performed at different time points for detecting changes in the mRNA levels of miR-21 and Smad7 target genes in the bone tissue. Dual-energy X-ray absorptiometry (DXA) was used to measure the distal femoral bone density in mice of each group. Results Immunohistochemical study revealed that the expression of Smad7 in the bone tissue of osteoporostic mouse gradually increased over time. Real time PCR analysis showed that the expression of mi R-21 gradually decreased, whereas the expression of Smad7 gradually increased. Over time, the bone density of mice gradually decreased, indicating that miR-21 was positively correlated with bone density, whereas Smad7 was negatively correlated with bone density. Conclusion Bone density of the osteoporotic mice gradually decreases. The expression of miR-21 is positively correlated with bone density, while that of Smad7 is negatively correlated with bone density.

Objective To investigate clinical efficacy of empathy nursing combined with venlafaxine slow release tablets for the treatment of depression.Methods A total of 64 depression patients were randomly divided into study group (n =32) and control group (n =32).Two groups were all given venlafaxine slow release tablets,and the specific empathy nursing were additionally carried out in the study group at the same time.The treatment course lasted for four weeks.All patients were measured by the World Health Organization Quality of Life Scale brief version (WHOQOL-BREF),Hamilton depression scale (HAMD),Hamilton anxiety scale (HAMA) before treatment and 4 weeks after treatment.Results After 4-week empathy nursing intervention and drugs treatment,the total scores of HAMD and HAMA in the study group and the control group were decreased,and the study group decreased more significantly than the control group,and the study group was higher than the control group(P ＜0.05).The each item scores of WHOQOL-BREF were increased in both groups,and the study group was significantly higher than the control group (P ＜ 0.05).Conclusion Empathy nursing combined with venlafaxine slow release tablets can improve depression,anxiety and other symptoms,and can improve life function,promote the patient's recovery and treatment efficacy,thereby to improve quality of life of patients.

Objective To investigate clinical efficacy of empathy nursing combined with venlafaxine slow release tablets for the treatment of depression.Methods A total of 64 depression patients were randomly divided into study group (n =32) and control group (n =32).Two groups were all given venlafaxine slow release tablets,and the specific empathy nursing were additionally carried out in the study group at the same time.The treatment course lasted for four weeks.All patients were measured by the World Health Organization Quality of Life Scale brief version (WHOQOL-BREF),Hamilton depression scale (HAMD),Hamilton anxiety scale (HAMA) before treatment and 4 weeks after treatment.Results After 4-week empathy nursing intervention and drugs treatment,the total scores of HAMD and HAMA in the study group and the control group were decreased,and the study group decreased more significantly than the control group,and the study group was higher than the control group(P ＜0.05).The each item scores of WHOQOL-BREF were increased in both groups,and the study group was significantly higher than the control group (P ＜ 0.05).Conclusion Empathy nursing combined with venlafaxine slow release tablets can improve depression,anxiety and other symptoms,and can improve life function,promote the patient's recovery and treatment efficacy,thereby to improve quality of life of patients.

Objective To study the characteristics and influencing factors of event-related potential (ERP) P300 in patients with obstructive sleep apnea hypopnea syndrome (OSAHS).Methods Twenty-two OSAHS patients (OSAHS group) and 18 healthy subjects (control group) were recruited,and the ERP P300 was recorded with all the subjects.The correlation between latency and amplitude of P300 and influencing factors including variation of sleep mode,apnea hypopnea index (AHI),mean oxyhemoglobin saturation level(MSaO2),the lowest of oxyhemoglobin saturation level (LSaO2),time of non-rapid eye movement (NREM) sleep Ⅰ,Ⅱ,Ⅲ,Ⅳ stage and rapid eye movement (REM) sleep over total sleep time and total sleep time of SaO2 ＜ 90％ (90％ SaO2) were analyzed by using linear regression correlation analysis and multiple stepwise regression analysis.Results The latencies of P3 component of P300 in OSAHS group were longer than that of control group[(344.24 ± 23.99)ms versus (311.17 ± 15.65) ms] (P＜ 0.05),while the amplitudes were decreased and lower in OSAHS group than that in control group [(3.66 ± 1.49) μV versus (6.26 ± 1.48) μV] (P ＜ 0.05).There revealed positive correlations between P3 latency and NREM Ⅰ and Ⅱ (r=0.492,P＜0.05),90％SaO2(r=0.627,P＜0.01),AHI(r=0.882,P＜0.01); negative correlation between P3 latency and NREM Ⅲ and Ⅳ (r =-0.558,P ＜ 0.01),LSaO2,(r =-0.479,P ＜0.05),MSaO2 (r =-0.519,P ＜ 0.05) was shown.There also revealed negative correlation between P3 amplitude and NREM Ⅰ and Ⅱ (r=-0.491,P ＜0.05),90％SaO2(r =-0.626,P＜0.01),AHI(r =-0.866,P ＜0.01),and positive correlation between P3 amplitude and NREM Ⅲ and Ⅳ (r =0.516,P ＜ 0.05),LSaO2 (r =0.475,P ＜ 0.05) 、MSaO2 (r =0.514,P ＜ 0.05).Stepwise regression and multivariate analysis revealed that AHI was one of the most significant influencing factors for latency and amplitude of P300 (P ＜ 0.01).Conclusion The OSAHS patients have cognitive dysfunction as reflected by the abnormalities of event-related potential P300 and the scale of its changes are correlated with the severity of OSAHS.The AHI is the most influential factor of P300.