Objective To investigate the correlation between serum iron and disease identification of community-acquired pneumonia(CAP)in middle-aged and elderly patients.Methods A total of 137 CAP patients hospitalized in Fuzhou First General Hospital Affiliated with Fujian Medical University from October 2019 to July 2024 were selected as objective.Logistic regression analysis were used to identify risk factors affecting serum iron levels.Receiver operating characteristic curve were used to evaluate predictive performance of independent influencing factors and combined applications.Results White blood cells,C-reactive protein,procalcitonin,D-dimer,infection site and range are risk factors for serum iron abnormalities.Area under the curve(AUC)of predicting serum iron abnormalities in CAP patients using above six indicators separately are 0.755,0.730,0.676,0.725,0.594,and 0.628.Combined applications predicted AUC was 0.883.Conclusion There is a certain correlation between changes in serum iron levels and recognition of CAP disease in middle-aged and elderly people.

The discovery of hemoglobin variants with low oxygen affinity,diagnostic methods,prognosis of carriers,and developments in analyzing hemoglobin oxygen-carrying and-releasing abilities are reviewed in this article in order to draw the attention of related clinical departments and to provide references for optimizing the process of diagnosis and treatment.Hemoglobin variants with low oxygen affinity originate from gene mutations encoding hemoglobin and autosomal dominant inheritance.The diagnosis should be combined with clinical manifestations and family history and differentiated from methemoglobinemia.A decrease in pulse oxygen saturation(SpO2)is often the first abnormality observed in asymptomatic carriers of hemoglobin variants with low oxygen affinity.Laboratory examinations include arterial blood gas analysis,hemoglobin oxygen affinity testing,protein analysis and gene sequencing.Most carriers do not require specific treatment and have a good prognosis,who should avoid acute hypoxic injuries induced by strenuous exercise,emotional stress,or high temperature.Moreover,health practitioners should pay attention to their responses to anesthetics,agents that induce oxidative stress,drugs that increase hemoglobin oxygen affinity,and prostacyclins.Hemoglobin oxygen-carrying and-releasing analysis is a promising tool to identify carriers of hemoglobin variants with low oxygen affinity because it does not involve unnecessary or invasive examinations and is of significant values for clinical diagnosis and treatment.

Objective To investigate the correlation between serum iron and disease identification of community-acquired pneumonia(CAP)in middle-aged and elderly patients.Methods A total of 137 CAP patients hospitalized in Fuzhou First General Hospital Affiliated with Fujian Medical University from October 2019 to July 2024 were selected as objective.Logistic regression analysis were used to identify risk factors affecting serum iron levels.Receiver operating characteristic curve were used to evaluate predictive performance of independent influencing factors and combined applications.Results White blood cells,C-reactive protein,procalcitonin,D-dimer,infection site and range are risk factors for serum iron abnormalities.Area under the curve(AUC)of predicting serum iron abnormalities in CAP patients using above six indicators separately are 0.755,0.730,0.676,0.725,0.594,and 0.628.Combined applications predicted AUC was 0.883.Conclusion There is a certain correlation between changes in serum iron levels and recognition of CAP disease in middle-aged and elderly people.

Patients with diabetic retinopathy often experience diabetes distress when facing the challenges of the disease, which has adverse effects on their health outcomes. This paper summarizes the current situation of diabetes distress in patients with diabetic retinopathy, and the assessment tools, influencing factors, and intervention measures, aiming to provide a reference for healthcare professionals to conduct intervention studies.

Objective To explore the impact of pH value of the reaction system on the properties of bovine hemoglobin modified with aldehydeated polyethylene glycol(PEG-bHb).Methods PEG-bHb conjugates were synthesized under varying pH conditions(6.0,6.5,7.4 and 8.0)of the reaction system while consistent molar ratios,temperature,and reaction time were maintained.The structural and functional attributes of PEG-bHb were characterized.Results The proportion of methemoglobin decreased with an increase in pH.In a weakly acidic reaction environment,the PEG-bHb was found to be relatively highly modified.At pH 6.5,the average number of PEG chains attached to the bHb surface was 6.86±0.38.Selective PEG modification of the N-terminal α-NH2 groups was more pronounced under weakly acidic conditions.Specifically,at pH 6.5,the modification efficiency of the N-terminal α-NH2 groups of bHb by aldehyde-activated PEG reached 95.4％for the α-chains and 99.3％for the β-chains.The PEG modification influenced the heme region microenvi-ronment of bHb,with minimal structural impact observed at pH 6.5.After modification,the oxygen affinity of PEG-bHb was enhanced,the Hill coefficient was reduced,and there were significant increases in colloid osmotic pressure,viscosity,and particle size,all of which differed markedly from the unmodified bHb group(P＜0.001).Conclusion The synthesis of PEG-bHb under weakly acidic conditions can result in a high degree of selective modification of the N-terminal α-NH2 groups and an overall high degree of modification.

Objective:The present study aims to investigate whether there is a shared alteration of the resting-state functional connectivity and amplitude of low frequency fluctuation (ALFF) within the limbic network across all three clinical phases of bipolar disorder.Methods:From July 2019 to December 2021, 107 patients diagnosed with bipolar disorder (bipolar disorder group) were recruited from the Institute of Mental Health at Xiangya Second Hospital, Central South University. Additionally, 46 healthy controls matched for age, gender, and education level were enrolled as the control group. According to the total scores of the Young Mania Rating Scale (YMRS) and the Hamilton Depression Rating Scale (HAMD 17), individuals with bipolar disorder can be categorized into three groups: bipolar manic group, bipolar depressive group, and bipolar euthymic group. Resting state functional magnetic resonance imaging data were collected from all the participants, and seed-based functional connectivity and ALFF in the limbic network were conducted to compare differences among three mood states and controls using One-way ANOVA and post hoc analysis. Finally, correlation analyses using Pearson or Spearman coefficients were performed between statistically significant intergroup differences in functional connectivity/ALFF values and total scores as well as factor scores on clinical rating scales. Results:In comparison to the healthy controls, there was a significant decrease in functional connectivity between the anterior cingulate gyrus and hippocampus across all three clinical phases of bipolar disorder after Bonferroni correction ( t=-2.60--2.07, P<0.05). Furthermore, the ALFF in the anterior cingulate gyrus during three phases showed a significantl reduction following false discovery rate correction ( t=-4.41--3.51, P<0.05). Moreover, a decreased functional connectivity between the left anterior cingulate gyrus and left hippocampus during the depressive phase demonstrated a significant negative correlation with work interest subscores of the HAMD 17 ( r=-0.406, P=0.021). Conclusions:Dysconnectivity and reduced activity within the anterior cingulate of the limbic network may represent common alterations of mood regulation disorder throughout all three clinical phases of bipolar disorder.

Objective:The present study aims to investigate whether there is a shared alteration of the resting-state functional connectivity and amplitude of low frequency fluctuation (ALFF) within the limbic network across all three clinical phases of bipolar disorder.Methods:From July 2019 to December 2021, 107 patients diagnosed with bipolar disorder (bipolar disorder group) were recruited from the Institute of Mental Health at Xiangya Second Hospital, Central South University. Additionally, 46 healthy controls matched for age, gender, and education level were enrolled as the control group. According to the total scores of the Young Mania Rating Scale (YMRS) and the Hamilton Depression Rating Scale (HAMD 17), individuals with bipolar disorder can be categorized into three groups: bipolar manic group, bipolar depressive group, and bipolar euthymic group. Resting state functional magnetic resonance imaging data were collected from all the participants, and seed-based functional connectivity and ALFF in the limbic network were conducted to compare differences among three mood states and controls using One-way ANOVA and post hoc analysis. Finally, correlation analyses using Pearson or Spearman coefficients were performed between statistically significant intergroup differences in functional connectivity/ALFF values and total scores as well as factor scores on clinical rating scales. Results:In comparison to the healthy controls, there was a significant decrease in functional connectivity between the anterior cingulate gyrus and hippocampus across all three clinical phases of bipolar disorder after Bonferroni correction ( t=-2.60--2.07, P<0.05). Furthermore, the ALFF in the anterior cingulate gyrus during three phases showed a significantl reduction following false discovery rate correction ( t=-4.41--3.51, P<0.05). Moreover, a decreased functional connectivity between the left anterior cingulate gyrus and left hippocampus during the depressive phase demonstrated a significant negative correlation with work interest subscores of the HAMD 17 ( r=-0.406, P=0.021). Conclusions:Dysconnectivity and reduced activity within the anterior cingulate of the limbic network may represent common alterations of mood regulation disorder throughout all three clinical phases of bipolar disorder.

Objective To compare the correlation and consistency of liquid chromatography-tandem mass spectrometry(LC-MS/MS)and electrochemiluminescence immunoassay(ECLIA)in the determination of se-rum 25-hydroxyvitamin D[25(OH)D],in order to guide the clinical selection of appropriate detection meth-ods.Methods A total of clinical serum samples were collected from the laboratory,and 25(OH)D levels were detected by LC-MS/MS and ECLIA,respectively.Passing-Boblok regression was used to analyze the correla-tion between the two methods,and Bland-Altman and Mountain plot were used to evaluate the agreement be-tween the two methods.Serum 25(OH)D<20.0 ng/mL was defined as vitamin D deficiency,and serum 25(OH)D as 20.0-<30.0 ng/mL was defined as vitamin D insufficiency.Kappa analysis was used to determine the coincidence rate of the two methods in the diagnosis of vitamin D nutritional status.Results The 25(OH)D levels detected by LC-MS/MS and ECLIA were(26.67±4.79)ng/mL and(39.33±4.09)ng/mL,respec-tively.The regression equation of the two methods was YECLIA=-4.558 1+1.719 8XLC-MS/MS,the slope was 1.719 8(95%CI 1.586 3-1.828 4),excluded 1,and the intercept was 4.558 1(95%CI-7.692 2--2.122 1),excluded 0,prompt system difference or ratio differences of the two methods.There were system-atic or proportional differences between the two methods.The Bland-Altman figure showed two methods aver-ages was 12.7,and the difference of out points(ratio)was 3.19%.The peak value of the mountain plot was-9.17 ng/mL,with more deviations from 0,indicating poor agreement between the results measured by the two methods.The Kappa coefficient of the two methods for judging vitamin D deficiency was 0.875,and the diagnostic coincidence rate was 94.68%.The Kappa coefficient of the two methods for judging vitamin D in-sufficiency was 0.538,and the diagnostic coincidence rate was 75.53%.Conclusion The agreement between ECLIA and LC-MS/MS is poor,but the agreement between ECLIA and LC-MS/MS in the diagnosis of vita-min D deficiency and insufficiency based on nutritional status is high.

Znic (Zn) alloys with good cytocompatibility and suitable degradation rate have been a kind of biodegradable metal with great potential for clinical applications. This paper summarizes the biological role of degradable Zn alloy as bone implant materials, discusses the mechanical properties of different Zn alloys and their advantages and disadvantages as bone implant materials, and analyzes the influence of different processing strategies (such as alloying and additive manufacturing) on the mechanical properties of Zn alloys. This paper provides systematic design approaches for biodegradable Zn alloys as bone implant materials in terms of the material selection, product processing, structural topology optimization, and assesses their application prospects with a view to better serve the clinic.
Orthopedics ; Zinc ; Alloys ; Dental Materials ; Prostheses and Implants

Objective To explore the related neurobiochemical mechanism by comparing the concentration change of dopamine (DA),dihydroxy-phenyl acetic acid (DOPAC),glutamate (Glu),and γ-aminobutyric acid (GABA) in the brain tissues in schizophrenia (SZ) developmental model rats and chronic medication model rats.Methods A total of 60 neonatal male Spragur-Dawley (SD) rats were randomly assigned to 3 groups at the postnatal day 6:an SZ developmental rat model group (subcutaneous injection with MK-801 at the postnatal day 7-10,0.1 mg/kg,Bid),a chronic medication model group (intraperitoneal injection at the postnatal day 47-60,0.2 mg/kg,Qd),and a normal control group (injection with O.9％ normal saline during the corresponding periods).DA,DOPAC,Glu,and GABA of the tissue homogenate from the medial prefrontal cortex (mPFC) and hippocampus were examined with Coularray electrochemic detection by high performance liquid chromatogram technique.The utilization rate of DA and Glu was calculated.Results Compared with the normal control group,the concentration of DA and DOPAC in the mPFC and the hippocampus in the SZ developmental model group significantly decreased ( P ＜ 0.05 ),and the GABA concentration and Glu utilization rate in the mPFC also decreased (P ＜ 0.05 ).Compared with the chronic medication model group,the DA concentration of the mPFC in the SZ developmental group decreased ( P ＜ 0.05 ),and the DOPAC concentration and the utility rate of DA in the hippocampus also decreased (P ＜0.01,P ＜0.05,respectively).Conclusion The activities of DA,Glu and GABA system decrease in the mPFC and the DA system function reduces in the hippocampus of SZ developmental rats.