Objective To investigate the effects of chronic intermittent hypoxia(CIH)on hippocampal neuronal injury in rats,and to clarify the role of endoplasmic reticulum(ER)stress-related apoptotic pathways.Methods Male Sprague-Dawley rats were randomly assigned to a control group(n=8)or a CIH group(n=8).The CIH group was exposed to intermittent hypoxia for 8 h/day over 8 weeks.Hippocampal neuronal morphology was examined by hematoxylin-eosin staining and transmission electron microscopy.Neuronal apoptosis was assessed using the TUNEL assay.Intracellular Ca2? levels were measured by flow cytometry.The mRNA and protein expression of ER stress-related factors(GRP78,CHOP)and the apoptotic effector Caspase-3 were quantified by qPCR and Western blot.Results Compared with controls,rats in the CIH group exhibited marked hippocampal neuronal damage,including disrupted cytoarchitecture,cytoplasmic dissolution,and swollen rough ER.Ultrastructural analysis revealed nuclear deformation and organelle disruption.TUNEL assay demonstrated a significant increase in apoptotic cells(P<0.05).Flow cytometry showed elevated intracellular Ca2? levels(P<0.05).GRP78,CHOP,and Caspase-3 were significantly upregulated at both mRNA and protein levels in the CIH group(all P<0.05).Conclusion CIH induces pronounced hippocampal neuronal injury and apoptosis in rats,associated with Ca2? dysregulation and activation of ER stress-mediated apoptotic pathways.These findings provide experimental evidence for elucidating the mechanisms of OSAHS-related neuronal injury and identifying potential therapeutic targets.

Objective:To compare the effects of using cone beam CT (CBCT) and oral scanning registration on implant positional accuracy during robot-assisted implant surgery, and to provide a basis for selecting the appropriate registration for robot-assisted implant surgical options.Methods:One patient with dentition defect, specifically missing teeth at positions 21 and 26 and having natural teeth adjacent mesially and distally to the edentulous area, who visited the Department of Oral Implantology, School of Hospital of Stomatology Wuhan University in 2024 were selected. Based on reconstructed imaging data, 30 identical jaw models were printed. These models were divided into a CBCT registration group and an intra-oral scanning registration group (15 models per group). An associate chief physician with extensive experience in implant surgery performed preoperative registration using the implant robot and completed the implant surgeries. Postoperative CBCT scans were used to determine the three-dimensional position of the implants. The deviations between the planned implant position and the actual position were evaluated, including deviations at the implantation point, apical point, and angular deviation. The differences between the two groups were compared.Results:The implantation deviation was 0.675 (0.490) mm, apical deviation was (0.680±0.272) mm, and the angular deviation was 0.566°±0.147° in the CBCT registration group, and in the intra-oral scanning registration group, implantation deviation was 0.695 (0.313) mm, apical deviation was (0.667±0.217) mm, and the angular deviation was 0.523°±0.168°. There was no statistically significant error in implant precision between the two groups ( P>0.05). Conclusions:This in vitro experiment found that the use of intra-oral scanning registration in robot-assisted implant surgery can achieve similar implant placement accuracy as CBCT registration.

Objective To investigate the effects of chronic intermittent hypoxia(CIH)on hippocampal neuronal injury in rats,and to clarify the role of endoplasmic reticulum(ER)stress-related apoptotic pathways.Methods Male Sprague-Dawley rats were randomly assigned to a control group(n=8)or a CIH group(n=8).The CIH group was exposed to intermittent hypoxia for 8 h/day over 8 weeks.Hippocampal neuronal morphology was examined by hematoxylin-eosin staining and transmission electron microscopy.Neuronal apoptosis was assessed using the TUNEL assay.Intracellular Ca2? levels were measured by flow cytometry.The mRNA and protein expression of ER stress-related factors(GRP78,CHOP)and the apoptotic effector Caspase-3 were quantified by qPCR and Western blot.Results Compared with controls,rats in the CIH group exhibited marked hippocampal neuronal damage,including disrupted cytoarchitecture,cytoplasmic dissolution,and swollen rough ER.Ultrastructural analysis revealed nuclear deformation and organelle disruption.TUNEL assay demonstrated a significant increase in apoptotic cells(P<0.05).Flow cytometry showed elevated intracellular Ca2? levels(P<0.05).GRP78,CHOP,and Caspase-3 were significantly upregulated at both mRNA and protein levels in the CIH group(all P<0.05).Conclusion CIH induces pronounced hippocampal neuronal injury and apoptosis in rats,associated with Ca2? dysregulation and activation of ER stress-mediated apoptotic pathways.These findings provide experimental evidence for elucidating the mechanisms of OSAHS-related neuronal injury and identifying potential therapeutic targets.

Background and aims:Primary sclerosing cholangitis(PSC)is an autoimmune liver disease characterized by complex pathogenesis and limited available therapeutic options.The mechanisms underlying the development and progression of PSCs remain unclear.Liver X receptor beta(LXR-β)is recognized to modulate lipid metabolism and immune response,but its specific involvement in the PSC has not been elucidated.Here,we explored the role and mechanism of LXR-β in PSC induced by 3,5-diethoxycarbonyl-1,4-dihydro-2,4,6-collidine(DDC).Methods:CRISPR-Cas9 technology was applied to generate Abcb4(coding MDR2,next named as Mdr2),Nr1h2(coding LXR-β,next named as Lxrβ),and Rag2(coding RAG2)knockout mice.DDC was used to induce PSC.Hematoxylin and eosin and Sirius red staining were used to assess the extent of hepatic injury and fibrosis.Flow cytometry was used to observe immune cell subsets.Results:We observed a declining trend in hepatic Lxrβ in the PSC model.Unexpectedly,Lxrβ knockout failed to modulate DDC-induced PSC pathogenesis.Concomitantly,assessment of the influence of Rag2 deficiency on PSC progression revealed the absence of aggravated or alleviated hepatic injury or fibrosis in the Rag2-/-DDC mice.However,Lxrβ depletion intensified DDC-induced PSC in the Rag2-/-mice,with more abundant infiltrative inflammatory cells and more severe liver fibrosis.Compared with Rag2-/-DDC mice,Lxrβ-/-Rag2-/-DDC mice had higher serum ALT and AST levels and mRNA expression of proinflammatory and profibrotic genes.Flow cytometry showed that LXR-β deficiency resulted in a diminished population of hepatic innate immune cells.Conclusion:This study indicated innate immune cell LXR-β deficiency can exacerbate hepatic injury and fibrosis in murine models of PSC suggesting that LXR-β may regulate the function of innate immunity in the fibrotic advancement of PSC.

Objective:To analyze the clinical characteristics, treatment response, and prognosis of patients newly diagnosed with immunoglobulin A multiple myeloma (IgA MM), and to ascertain whether the IgA isotype remains a poor prognostic factor in the bortezomib era.Methods:This study retrospectively enrolled 155 patients newly diagnosed with IgA MM and 420 with non-IgA MM admitted to the Department of Hematology, the First Affiliated Hospital of Nanchang University from March 2014 to December 2021. We compared the two groups in terms of their clinical characteristics, prognoses, and progression-free survival (PFS) and overall survival (OS) following different treatment regimens.Results:Compared with the non-IgA group, the IgA group presented with more aggressive clinical features, including a higher proportion of patients with hemoglobin<85 g/L (61.3% vs 51.4%, P=0.035), extramedullary manifestations (20.0% vs 11.4%, P=0.008), and gain/amp (1q21) (48.6% vs 36.7%, P=0.032). Efficacy analysis revealed a lower overall response rate (ORR) in the IgA group than in the non-IgA group (83.2% vs 92.4%, P=0.001). Among patients treated with bortezomib-based regimens, the ORR was 91.2% in the IgA group and 94.8% in the non-IgA group, but the difference was nonsignificant ( P=0.146). Survival analysis showed that the median PFS and OS were significantly shorter in the IgA group compared with the non-IgA group[23.5 (95% CI: 17.4-29.5) months and 48.8 (95% CI: 30.1-67.5) months vs 40.7 (95% CI: 33.8 - 47.6) months and not reached, respectively; P<0.001 and P=0.002]. In the subgroup of patients who received bortezomib-based therapy without subsequent autologous hematopoietic stem cell transplantation (auto-HSCT), the PFS and OS were significantly shorter in the IgA group compared with the non-IgA group[25.4 (95% CI: 18.7-32.1) months and 53.5 (95% CI: 35.4-71.6) months vs 41.0 (95% CI: 33.7-48.3) months and not reached; P=0.001 and P=0.011]. In patients who underwent bortezomib-based induction therapy followed by auto-HSCT, the 1-, 3-, and 5-year OS rates for the IgA group were 96%, 81%, and 81%, respectively, compared with 93%, 89%, and 79% for the non-IgA group, but the difference was nonsignificant ( P=0.758) . Conclusion:In the bortezomib era, IgA MM is still associated with a poorer overall prognosis than non-IgA MM, likely due to its inherent high-risk biological characteristics. Although bortezomib-based regimens effectively improve the treatment response, they fail to completely bridge the survival gap between the two disease isotypes. Therefore, bortezomib-based therapy followed by auto-HSCT may be a key strategy to overcome the poor prognosis of IgA MM, potentially enabling these patients to achieve long-term survival comparable to that of their non-IgA counterparts.

Objective:To compare the effects of using cone beam CT (CBCT) and oral scanning registration on implant positional accuracy during robot-assisted implant surgery, and to provide a basis for selecting the appropriate registration for robot-assisted implant surgical options.Methods:One patient with dentition defect, specifically missing teeth at positions 21 and 26 and having natural teeth adjacent mesially and distally to the edentulous area, who visited the Department of Oral Implantology, School of Hospital of Stomatology Wuhan University in 2024 were selected. Based on reconstructed imaging data, 30 identical jaw models were printed. These models were divided into a CBCT registration group and an intra-oral scanning registration group (15 models per group). An associate chief physician with extensive experience in implant surgery performed preoperative registration using the implant robot and completed the implant surgeries. Postoperative CBCT scans were used to determine the three-dimensional position of the implants. The deviations between the planned implant position and the actual position were evaluated, including deviations at the implantation point, apical point, and angular deviation. The differences between the two groups were compared.Results:The implantation deviation was 0.675 (0.490) mm, apical deviation was (0.680±0.272) mm, and the angular deviation was 0.566°±0.147° in the CBCT registration group, and in the intra-oral scanning registration group, implantation deviation was 0.695 (0.313) mm, apical deviation was (0.667±0.217) mm, and the angular deviation was 0.523°±0.168°. There was no statistically significant error in implant precision between the two groups ( P>0.05). Conclusions:This in vitro experiment found that the use of intra-oral scanning registration in robot-assisted implant surgery can achieve similar implant placement accuracy as CBCT registration.

Objective:To analyze the clinical characteristics, treatment response, and prognosis of patients newly diagnosed with immunoglobulin A multiple myeloma (IgA MM), and to ascertain whether the IgA isotype remains a poor prognostic factor in the bortezomib era.Methods:This study retrospectively enrolled 155 patients newly diagnosed with IgA MM and 420 with non-IgA MM admitted to the Department of Hematology, the First Affiliated Hospital of Nanchang University from March 2014 to December 2021. We compared the two groups in terms of their clinical characteristics, prognoses, and progression-free survival (PFS) and overall survival (OS) following different treatment regimens.Results:Compared with the non-IgA group, the IgA group presented with more aggressive clinical features, including a higher proportion of patients with hemoglobin<85 g/L (61.3% vs 51.4%, P=0.035), extramedullary manifestations (20.0% vs 11.4%, P=0.008), and gain/amp (1q21) (48.6% vs 36.7%, P=0.032). Efficacy analysis revealed a lower overall response rate (ORR) in the IgA group than in the non-IgA group (83.2% vs 92.4%, P=0.001). Among patients treated with bortezomib-based regimens, the ORR was 91.2% in the IgA group and 94.8% in the non-IgA group, but the difference was nonsignificant ( P=0.146). Survival analysis showed that the median PFS and OS were significantly shorter in the IgA group compared with the non-IgA group[23.5 (95% CI: 17.4-29.5) months and 48.8 (95% CI: 30.1-67.5) months vs 40.7 (95% CI: 33.8 - 47.6) months and not reached, respectively; P<0.001 and P=0.002]. In the subgroup of patients who received bortezomib-based therapy without subsequent autologous hematopoietic stem cell transplantation (auto-HSCT), the PFS and OS were significantly shorter in the IgA group compared with the non-IgA group[25.4 (95% CI: 18.7-32.1) months and 53.5 (95% CI: 35.4-71.6) months vs 41.0 (95% CI: 33.7-48.3) months and not reached; P=0.001 and P=0.011]. In patients who underwent bortezomib-based induction therapy followed by auto-HSCT, the 1-, 3-, and 5-year OS rates for the IgA group were 96%, 81%, and 81%, respectively, compared with 93%, 89%, and 79% for the non-IgA group, but the difference was nonsignificant ( P=0.758) . Conclusion:In the bortezomib era, IgA MM is still associated with a poorer overall prognosis than non-IgA MM, likely due to its inherent high-risk biological characteristics. Although bortezomib-based regimens effectively improve the treatment response, they fail to completely bridge the survival gap between the two disease isotypes. Therefore, bortezomib-based therapy followed by auto-HSCT may be a key strategy to overcome the poor prognosis of IgA MM, potentially enabling these patients to achieve long-term survival comparable to that of their non-IgA counterparts.

[Objective]To investigate the association between screen content and the frequency of screen exposure at the age of one and a half years and hyperactive behavior in preschool,and to explore how the association is affected by the interaction between outdoor activities and screen behaviors,which could provide theoretical basis and feasible solutions for the prevention and intervention of behavioral problems in childhoood.[Methods]The survey was conducted from June 2022 to June 2023 in Huicheng District,Huizhou (China) stratified by whole cluster sampling methods. Parents and teachers of 5648 children in 61 kindergartens were sampled for questionnaire surveys. The Conners Teacher Rating Scale (TRS) was used to investigate hyperactive behavior. A self-administered questionnaire was used to investigate basic demographic information of children,screen content,frequency of screen exposure and outdoor activities at the age of one and a half years. Multivariate logistic regression was used to explore the association between video screen behavior and hyperactive behavior and its interaction with outdoor activities by controlling for covariates such as children's age,gender,and parental education.[Results]Result showed the overall prevalence of 3.2％ for hyperactive behavior,2.1％ for conduct problems,2.1％ for hyperactivity problems,1.3％ for inattention-passivity problems,and 0.9％ for hyperactivity index. After adjusting for confounding factors,multiple logistic regression analysis showed that screen exposure of "two to four times a week" at one and a half years old was associated with an increased detection rate of hyperactive behaviors in preschool children,with an estimated ORs (95％ CI) of 1.682 (1.141,2.480). Daily screen exposure was associated with increased detection rates of hyperactive behavior,conduct problems,hyperactivity issues,inattention-passivity problems,and hyperactivity index in pre-school age. The estimated ORs (95％ CI) were 2.136 (1.218,3.746),2.321 (1.185,4.546),2.300 (1.208,4.380),2.776 (1.267,6.085) and 3.640 (1.525,8.687),respectively. But the above associations were not found in children who were engaged in daily outdoor activities at the age of one and a half years (P value for interaction<0.001). No association was found between screen content and hyperactive behavior (P>0.05).[Conclusions]Frequency of screen exposure in early childhood is significantly associated with hyperactive behavior problems in preschool,and outdoor activities could weaken the correlation between high-frequency screen exposure and hyperactive behavior,suggesting that parents and schools should prioritize scientifically guiding children's video viewing behavior and outdoor activities,ensuring a well-arranged daily life,to lay a good foundation for the healthy development of children's behavior.

Enhanced recovery after surgery has reduced the number and duration of medical catheter placements through perioperative optimization measures. However, in clinical practice, catheters are still inevitably heavily used, and the risk of catheter-related infections persists. Preventing bacterial adhesion and biofilm formation on catheter surfaces is crucial. Medical antibacterial-coated catheters introduce substances that prevent fouling and adhesion, inhibit or kill bacteria on the surface, forming an antibacterial functional surface, providing a new strategy to address catheter-related infections. This article summarizes the current research status of medical antibacterial-coated catheters, introduces the antibacterial strategies and principles of the coatings, describes their actual effects in clinical applications, and analyzes future research directions. These studies help reduce catheter-related infections, promote innovation in clinical nursing technology, and improve the quality and efficiency of nursing care.