BACKGROUND:It is necessary to dynamicaly monitor the survival, recognition and migration of neural stem cels after implantation.
OBJECTIVE:Toin vitro label fetal rat neural stem cels using MRI technology so as to provide applied evidence of neural stem cels in nervous system repair.
METHODS:Fetal rat neural stem cels were isolated, cultured and labeled folowed by identification and cel viability detection. A rat model of cerebral ischemia-reperfusion injury was established. Fetal neural stem cels labeled by superparamagnetic iron oxide particlesin vitro were transplanted into the left brain of model rats, and unlabeled fetal rat neural stem cels transplanted into the right brain. Prussian blue staining was used to observe the colonization and migration of implanted neural stem cels. MRI tracing was employed to monitor the signal changes of neural stem cels dynamicaly afterin vivo transplantation.
RESULTS AND CONCLUSION:Over 95% fetal rat neural stem cels were labeled successfuly by superparamagnetic iron oxide particles, and under electron microscope, there were iron particles in labeled neural stem cels, which were concentrated in the lysosome and endosome. MRI results showed that the labeled neural stem cels had a changing trend of low signals. No difference was found in the cel viability between labeled and unlabeled cels, but T2WI and T2*WI signals were reduced in labeled neural stem cels. These findings confirm that superparamagnetic iron oxide-labeled fetal rat neural stem cels can highly express, and MRI tracing can be used forin vivo monitoring of neural stem cels.

Objective: To observe the efficacy and safety of Brucea javanica oil injection combined with S-1 in the treatment of elderly patients with advanced gastric cancer. Methods: The clinical data of 62 elderly patients with advanced gastric cancer who were admitted to Shanxi Provincial Cancer Hospital from May 2017 to May 2018 were retrospectively analyzed. Thirty-one patients in the control group treated with S-1 alone, and 31 patients in the observation group treated with S-1 combined with Brucea oil emulsion injection. The clinical efficacy, adverse reactions, immune function and quality of life of the two groups were compared. Results: The total effective rates of the observation group and the control group were 70.97% (22/31) and 48.39% (15/31), respectively, and the difference was statistically significant (χ ² = 11.889, P < 0.01). The incidence rates of gastrointestinal reaction and peripheral neurotoxicity in the observation group were 9.68% (3/31) and 3.23% (1/31), and the rates in the control group were 35.48% (11/31) and 25.81% (8/31), respectively, the differences between the two groups were statistically significant (both P < 0.05); the incidence rates of hepatotoxicity, nephrotoxicity and myelosuppression in the observation group were 3.23% (1/31), 3.23% (1/31), and 3.23% (1/31), and the rates in the control group were 22.58% (7/31), 16.13% (5/31), and 12.90% (4/31), respectively, and the differences between the two groups were not statistically significant (all P > 0.05). The Karnofsky scores of the observation group and the control group after treatment were (92±4) points and (86±3) points, respectively, and the difference was statistically significant (t = -2.075, P = 0.042). The serum levels of interleukin-2 (IL-2) and interferon-γ in the observation group after treatment were (38±4) ng/L and (51±4) ng/L, and the levels in the control group were (31±3) ng/L and (40±4) ng/L, respectively, and the differences were statistically significant (t values were -2.097 and -2.293, both P < 0.05), and the serum levels of IL-4, IL-6 and IL-10 in the observation group after treatment were (42±5) ng/L, (34±4) ng/L and (22±2) ng/L, and the levels in the control group were (59±6) ng/L, (50±5) ng/L and (30±3) ng/L, respectively, and the differences were statistically significant (t values were 2.109, 2.867 and 4.278, all P < 0.05). There was no statistical difference in the serum levels of tumor necrosis factor-α between the observation group and the control group after treatment (t = -0.922, P = 0.360). Conclusion Compared with monotherapy of S-1, the treatment of Brucea javanica oil emulsion injection combined with S-1 can improve the clinical efficacy, reduce the incidence of adverse reactions, enhance the immune function and effectively improve the quality of life of elderly patients with advanced gastric cancer.

Objective To analyze the current status and quality of existing obstetrics and gynecology enhanced recovery after surgery(ERAS)guidelines/consensus,understand the evidence-based practices in this field,and provide a basis for clinical decision-making.Methods A systematic search of PubMed,CNKI,and other databases,as well as NGC,SIGN,and websites of anesthesia societies domestically and internationally was conducted to obtain relevant guidelines and consensus on ERAS for gynecological surgery.The search was conducted from inception to July 1,2023,and the AGREE Ⅱ and RIGHT tools were used to analyze the current status and quality of the included guidelines/consensus,as well as to conduct a summary of the recommendations.Results A total of 5 guidelines and 10 consensus statements were included.The publication years were from 2018 to 2023,originating from the United States,China,Canada,and the United Kingdom.In the 6 areas evaluated using AGREEⅡ,clarity(66.06％)scored highest,followed by scope and purpose(56.67％),involvement of stakeholders(42.02％),and editorial independence(37.64％)with scores above 30％.The scores for rigor of development(26.88％)and applicability(4.17％)were relatively low.The same items among different evaluators indicated good consistency.The results of the scores in each area were as follows:A-level 2,B-level 13,and no C-level.Two high-quality guidelines were selected.The average RIGHT reporting rate was 44.38％.Subgroup analysis showed that guidelines were higher than consensus statements in the areas of rigor of development and applicability(P＜0.05),and that using GRADE was higher than not using(P＜0.05).The areas of rigor of development and clarity were higher in foreign guidelines than domestic guidelines(P＜0.05),and using evidence grading tools was higher than not using(P＜0.05).The summary of the recommendations showed that the quality of the evidence supporting the recommendations was uneven,and some recommendations were not specific enough.Conclusion The quality of the 15 included ERAS guidelines/consensus in obstetrics and gynecology is uneven,and 2 of them can be used as high-quality guidelines for clinical reference.The quality of evidence-based guidelines in foreign countries is higher,and the use rate of GRADE in foreign guidelines is high,most of which can provide clear recommendation strength and evidence level.Chinese guidelines/consensus are of lower quality compared to overseas,and methodology and report quality need further improvement.Overall,it is still necessary to strengthen the formulation of methods and reporting standards,improve the quality of evidence,and refine specific recommendations.

Objective:To investigate the knowledge, attitudes, and practices (KAP) of pulse oximetry among pediatric healthcare providers in China and analyze the factor influencing the KAP.Methods:A self-developed questionnaire was used for an online research on the KAP of 11 849 pediatric healthcare providers from 31 provinces, autonomous regions, and municipalities of China from March 11 to 14, 2022.The factors influencing the KAP of pulse oximetry among pediatric healthcare providers were examined by Logistic regression. Results:The scores of KAP, of pulse oximetry were 5.57±0.96, 11.24±1.25 and 11.19±4.54, respectively.The corresponding scoring rates were 69.61%, 74.95%, and 55.99%, respectively. Logistic regression results showed that the gender and working years of pediatric healthcare providers, the region they were located, and whether their medical institution was equipped with pulse oximeters were the main factors affecting the knowledge score (all P<0.05). Main factors influencing the attitude score of pediatric healthcare providers included their knowledge score, gender, educational background, working years, region, medical institution level, and whether the medical institution was equipped with pulse oximeters (all P<0.05). For the practice score, the main influencing factors were the knowledge score, gender, age, and whether the medi-cal institution was equipped with pulse oximeters (all P<0.05). Conclusions:Chinese pediatric healthcare providers need to further improve their knowledge about and attitudes towards pulse oximetry.Pulse oximeters are evidently under-used.It is urgent to formulate policies or guidelines, strengthen education and training, improve knowledge and attitudes, equip more institutions with pulse oximeters, and popularize their application in medical institutions.

Objective: To understand the consistency of ALK Ventana-D5F3 immunohistochemistry (IHC) interpretation in Chinese lung adenocarcinoma among histopathologists from different hospitals, and to recommend solution for the problems found during the interpretation of ALK IHC in real world, with the aim of the precise selection of patients who can benefit from ALK targeted therapy. Methods: This was a multicenter and retrospective study. A total of 109 lung adenocarcinoma cases with ALK Ventana-D5F3 IHC staining were collected from 31 lung cancer centers in RATICAL research group from January to June in 2018. All cases were scanned into digital imaging with Ventana iSCANcoreo Digital Slide Scanning System and scored by 31 histopathologists from different centers according to ALK binary (positive or negative) interpretation based on its manufacturer′s protocol. The cases with high inconsistency rate were further analyzed using FISH/RT-PCR/NGS. Results: There were 49 ALK positive cases and 60 ALK negative cases, confirmed by re-evaluation by the specialist panel. Two cases (No. 2302 and No.2701) scored as positive by local hospitals were rescored as negative, and were confirmed to be negative by RT-PCR/FISH/NGS. The false interpretation rate of these two cases was 58.1% (18/31) and 48.4% (15/31), respectively. Six out of 31 (19.4%) pathologists got 100% accuracy. The minimum consistency between every two pathologists was 75.8%.At least one pathologist gave negative judgement (false negative) or positive judgement (false positive) in the 49 positive or 60 negative cases, accounted for 26.5% (13/49), 41.7% (25/60), respectively, with at least one uncertainty interpretation accounted for 31.2% (34/109). Conclusion There are certain heterogeneities and misclassifications in the real world interpretation of ALK-D5F3 IHC test, which need to be guided by the oncoming expert consensus based on the real world data.