新生儿期的免疫系统发育阶段对维持新生儿健康至关重要,具有独特的免疫调节机制。近年来,人们越来越关注髓源性抑制细胞（MDSCs）在新生儿免疫调节中的作用。MDSCs是一类免疫抑制功能强大的异质性细胞群体,它们能够通过多种机制调节免疫应答。MDSCs在新生儿中的调节作用对防止过度免疫反应和促进免疫耐受至关重要,有助于预防新生儿期炎症性疾病,并对其后续健康产生积极影响。近期研究文献分析展示了MDSCs在新生儿免疫调节中的多种作用机制,包括在特定病理条件下的保护作用、与新生儿期炎症反应的相互作用,以及对长期免疫发展的潜在影响。因此,深入理解MDSCs在新生儿免疫中的角色,不仅有助于揭示其复杂的调节机制,也为制定新的预防和治疗新生儿炎症性疾病的策略提供了新的思路。

The developmental stage of the immune system during the neonatal period is crucial for maintaining neonatal health,characterized by unique immunoregulatory mechanisms．In recent years,increasing attention has been drawn to the role of myeloid-derived suppressor cells（MDSCs）in neonatal immune regulation．MDSCs represents a heterogeneous population of cells with potent immunosuppressive functions,capable of modulating immune responses through various mechanisms．The regulatory role of MDSCs in neonates is vital for preventing excessive immune reactions and promoting immune tolerance,thereby aiding in the prevention of neonatal inflammatory diseases and positively influencing subsequent health outcomes．Analysis of recent research literature reveals multiple mechanisms through which MDSCs contribute to neonatal immune regulation,including protective effects under specific pathological conditions,interactions with neonatal inflammatory responses,and potential impacts on long-term immune development．Therefore,a comprehensive understanding of the role of MDSCs in neonatal immunity not only helps elucidate their intricate regulatory mechanisms but also provides novel insights for developing strategies for the prevention and treatment of neonatal inflammatory diseases．

目的 评价早产儿经胃管喂养后采用空气冲管的应用效果。方法 选择2021年1月–2021年12月广州市第一人民医院收治的经胃管喂养后采用温水冲管的60例早产儿为对照组,选择2022年1月–2022年12月收治的经胃管喂养后采用空气冲管的57例早产儿为研究组。喂养1周后,比较两组患儿体质量增加量、血清白蛋白浓度增加量、大便量、喂养不耐受发生率、胃管堵塞率等指标的差异。结果 无患儿发生胃管堵塞。研究组的血清白蛋白浓度增加量[（2.86±5.61）g/L]高于对照组[（0.84±5.27）g/L]（P<0.05）,而两组患儿在体质量增加量、大便量、喂养不耐受发生率等方面比较差异无统计学意义（P>0.05）。多元线性回归分析结果显示空气冲管为血清白蛋白浓度增加量的影响因素（P<0.05）。结论 采用空气进行胃管冲管的方法可改善早产儿的营养状态。

Objective To evaluate the effects of flushing gastric tube by air after feeding in premature infants．Methods A total of 60 premature infants admitted to Guangzhou First People's Hospital from January 2021 to December 2021 whose gastric tube were flushed with water after feeding were selected as the control group,while 57 admitted from January 2022 to December 2022 whose gastric tube were flushed with air after feeding were selected as the study group．After 1 week of feeding,the differences of weight increase,serum albumin concentration increase,stool volume,feeding intolerance incidence and gastric tube blockage rate were compared between the 2 groups．Results No gastric tube blockage occurred．The increase of serum albumin concentration in the study group[（2.86±5.61）g/L] was significantly higher than that in the control group[（0.84±5.27）g/L]（P<0.05）,but there were no significant differences in weight increase,stool volume and feeding intolerance incidence between the 2 groups．Multiple linear regression analysis showed that the flushing gastric tube with air was an independent influencing factor for the increase of serum albumin（P<0.05）．Conclusions Flushing gastric tube with air can improve the nutritional status of premature infants,which is worthy of clinical application．

目的 观察低出生体重早产儿应用抗生素后肠道菌群的动态变化。方法 选取2018年6月—2019年7月在广州市第一人民医院住院的10名低出生体重早产儿,在出生时、出生后1~2周、出生后2~3周、出生后3~4周、出生后4~5周、出生后5~6周时分别收集粪便样本,通过16s高通量测序检测患儿粪便菌群变化并统计分析。结果 应用抗生素后的低出生体重早产儿肠道菌群α多样性(Shannon指数、Simpson指数、ACE指数和PD_whole_tree指数)下降(P均<0.05),肠道菌群结构在门、科、属水平均发生改变,其中Alistipes、Bacteroides、Lactobacillus、unidentified_Lachnospiraceae、unidentified_Ruminococcaceae、Alloprevotella、unidentified_Cyanobacteria、Bacillus、Stenotrophomonas和Acinetobacter菌属相对丰度减少(P均<0.05)。结论 低出生体重早产儿应用抗生素后肠道菌群多样性下降,肠道菌群结构发生改变,并在抗生素停用后仍持续,针对性补充益生菌或益生元可能有助于肠道菌群恢复稳态。

Objective To observe the dynamic changes of gut microbiota in premature infants with low birth weight after antibiotics therapy. Methods 10 low birth weight premature infants hospitalized in Guangzhou First People's Hospital from June 2018 to July 2019 were included. Fecal samples were collected at birth, 1~2 weeks after birth, 2~3 weeks after birth, 3~4 weeks after birth, 4~5 weeks after birth and 5~6 weeks after birth, respectively. The changes of fecal microbiota were detected and analyzed by 16s high-throughput sequencing. Results The α-diversity of gut microbiota (Shannon index, Simpson index, ACE index and PD_whole_tree index) in low birth weight preterm infants treated with antibiotics decreased (P<0.05). The structure of gut microbiota changed at phylum, family and genus levels, among which Alistipes, Bacteroides, Lactobacillus, unidentified_Lachnospiraceae, unidentified_Ruminococcaceae, Alloprevotella, unidentified_Cyanobacteria, Bacillus, Stenotrophomonas and Acinetobacter decreased (P<0.05). Conclusion The diversity of gut microbiota in low birth weight preterm infants decreased and the structure of gut microbiota changed after antibiotic therapy. Targeted supplementation of probiotics or prebiotics may contribute to the recovery of gut microbial homeostasis.

目的 检测外周血循环肿瘤细胞(circulating tumor cell, CTC)在原发性肝癌患者中的表达情况,并探讨CTC动态变化及其相对于甲胎蛋白(Alpha fetoprotein AFP)对原发性癌患者术后复发转移的预测作用。方法 收集原发性肝癌患者134例,肝脏良性病变患者72例,检测外周血 CTC 数目,同时检测AFP的表达水平,分析 CTC 与 AFP 的相关性。然后在134名原发性肝癌患者中筛选出成功行肝癌根治术的患者,共86例,检测这86名患者术前、术后外周血CTC和AFP,分析CTC和AFP对原发性肝癌术后复发转移的评估价值。结果 原发性肝癌患者外周血CTC阳性率高于肝脏良性病变患者,差异有统计学意义(P＜0.05);原发性肝癌患者CTC水平与AFP水平、淋巴结转移、肿瘤结节多少有关,与年龄、性别、肿瘤直径、分化程度、肝硬化有无、TNM分期无关;原发性肝癌患者CTC和AFP生存分析显示,原发性肝癌根治术后早期复发转移与CTC和AFP密切相关;CTC较阳性对术后复发转移具有更好的诊断价值,二者联合对复发转移预测价值最高。结论 CTC可以做为一个比传统肿瘤标志物更好的对原发性肝癌术后复发转移进行监测的指标,与肿瘤标志物联合检测预测价值更高。

Objective To detect the expression of peripheral blood circulating tumor cells CTC in patients with primary liver cancer and to explore the dynamic changes of CTC and its predictive effect on postoperative recurrence and metastasis of primary cancer. Methods The number of CTC in peripheral blood was measured in 134 patients with primary liver cancer and 72 patients with benign liver disease, the expression of AFP was detected, and the correlation between CTC and AFP was analyzed. Then 86 patients with primary liver cancer were selected from 134 patients with primary liver cancer who underwent radical hepatectomy. The values of CTC and AFP in evaluating recurrence and metastasis of primary liver cancer before and after operation were analyzed by CTC and AFP, in peripheral blood of these 86 patients. Results The positive rates of CTC in peripheral blood of patients with primary liver cancer were higher than that of patients with benign liver disease(P< 0.05). The levels of CTC in patients with primary liver cancer were related to AFP level, lymph node metastasis and the number of tumor nodules, but not to age, sex, tumor diameter, differentiation degree, liver cirrhosis and TNM stage. The survival analysis of CTC and AFP in patients with primary liver cancer showed that the early recurrence and metastasis of primary liver cancer after radical resection were closely related to the positive rate of CTC and AFP, and the positive rate of CTC was more effective than that of AFP positive in the diagnosis of recurrence and metastasis after operation, and the combination of the two had the highest predictive value for recurrence and metastasis. Conclusion CTC may be used as a better index to monitor postoperative recurrence and metastasis of primary liver cancer than traditional tumor markers. The combined detection prediction value of tumor markers is higher.

目的 探讨广东汉族儿童ACE2基因A9570G多态性与儿童激素敏感型肾病综合征(SSNS)复发的关系。方法 选取广东汉族SSNS患儿92例,按发病后1年复发情况分为频复发组31例、非频复发组61例,健康体检者60例为对照组,采用聚合酶链反应-DNA直接测序技术观察患儿与对照组ACE2基因A9570G基因型分布和等位基因频率。结果 在女性,SSNS组G等位基因频率及GG基因型分布均低于对照组(39％ vs 65％,P<0.05;27％ vs 50％,P<0.05);在男性,SSNS组G等位基因/GG基因型分布亦低于对照组(35％ vs 60％,P<0.05 )。亚组分析发现,在女性,频复发组G 等位基因频率及GG 基因型分布均高于非频复发组(58％ vs 29％,P<0.05;42％ vs 19％,P<0.05);在男性,频复发G基因型/G等位基因频率高于非频复发(58％ vs 24％,P<0.05)。结论 ACE2基因A9570G多态性与儿童SSNS复发相关,携带G等位基因的患儿容易表现为频复发。

Objective To investigate the association between the A9570G polymorphism of ACE2 gene and the relapse of steroid-sensitive nephrotic syndrome (SSNS) in Han childhood of Guangdong.Methods Ninety-two children with SSNS were selected from Guangdong Han nationality. According to the relapse frequency during the first year of the disease, 31 cases with more than 3 relapses were as frequency relapse group, 61 cases with less than 3 relapses were as non-frequent relapse group, and 60 healthy children were as control group. The gene distribution and allele frequency of ACE2 gene A9570G were observed by polymerase chain reaction-DNA direct sequencing technology.Results In female,the distribution of G allele frequency and GG genotype in SSNS group were significantly lower than that in the control group(39％ vs 65％, P<0.05; 27％ vs 50％, P<0.05). In male, the distribution of G allele/GG genotype in SSNS group was also significantly lower than that in the control group(35% vs 60%, P<0.05). Subgroup analysis found that the distribution of G allele frequency and GG genotype in female of the frequency relapse group were significantly higher than that of the non-frequency relapse group(58% vs 29%, P<0.05; 42% vs 19%, P<0.05), and the distribution of G allele/GG genotype in male of the frequency relapse group was significantly higher than that of the non-frequency relapse group (58% vs 24%, P<0.05).Conclusion The A9570G polymorphism of ACE2 gene was associated with the recurrence of children's SSNS, and the children with G allele were susceptible to recurrence.

目的 探讨用捏脊联合中药外洗治疗脾胃气虚型儿童功能性消化不良的效果。方法 随机选取脾胃气虚型功能性消化不良的儿童120例,分为联合组、捏脊组、外洗组、对照组4个组,每组30例,分别采用捏脊、中药外洗、捏脊联合中药外洗、吗丁啉进行治疗,两周后观察4组治疗效果及唾液淀粉酶活性比值、D-木糖排泄率的变化,进行分析。结果 联合组的有效率优于捏脊组、外洗组、对照组,差异有统计学意义(P<0.05)。治疗后联合组的唾液淀粉酶活性比值比捏脊组、外洗组、对照组提高,差异有统计学意义(P<0.05)。治疗后D-木糖排泄率均较治疗前有增加,两两比较,联合组与对照组比较差异有统计学意义(P<0.05)。结论 捏脊联合中药外洗可改善脾胃气虚型儿童功能性消化不良,疗效良好,其机理同改善唾液淀粉酶活性有关。

       目的   探讨预防性风险管理在肌层浸润性膀胱癌根治术后的应用效果及对术后生活质量影响。方法   选取2020年6月—2023年10月安阳市肿瘤医院收治的66例肌层浸润性膀胱癌患者，应用抽签法分为观察组（n=33）与对照组（n=33）。所有患者均采取根治性全膀胱切除术与淋巴清扫术治疗，对照组患者术后实施常规护理，观察组在对照组基础上增加预防性风险管理。对比两组术后尿量、胃肠功能恢复时间、术后住院时间，干预前后病耻感及负面情绪、术后并发症发生率，最后对比两组干预前后生活质量变化。结果   两组患者术后尿量对比差异无统计学意义（P＞0.05），观察组术后胃肠功能恢复时间为（5.27±0.82）d，术后住院时间为（18.31±3.27）d，短于对照组的（7.25±1.12）（23.27±4.18）d，对比差异有统计学意义（t分别为8.194、5.369，P＜0.05）；干预后两组患者病耻感量表（SSCI）、抑郁自评量表（SDS）和焦虑自评量表（SAS）评分均降低，观察组分别为（35.67±7.45）（40.02±2.43）（45.36±4.17）分，低于对照组的（48.27±10.69）（54.54±3.54）（51.37±4.38）分，对比差异有统计学意义（t分别为5.555、19.426、5.709，P＜0.05）；观察组术后并发症发生率为9.09%，低于对照组的30.30%（χ ² =4.690，P=0.030）；干预后两组膀胱癌特异性模块、功能状况、精神状况、家庭/社会状况及躯体状况相关维度膀胱癌患者生活质量量表（FACT-BL）评分均升高，观察组分别为（34.27±3.26）（25.11±4.23）（21.51±4.23）（25.02±4.43）（20.56±3.11）分，高于对照组的（27.00±4.34）（21.11±3.24）（16.12±2.12）（21.54±5.54）（15.87±4.13）分，对比差异有统计学意义（t分别为7.694、4.313、6.544、2.818、5.211，P＜0.05）。结论   预防性风险管理在肌层浸润性膀胱癌根治术后的应用效果显著，可缩短患者术后胃肠功能恢复时间及住院时间，改善患者负面情绪，有助减少术后并发症，提升患者生活质量。

       Objective  To explore the effect of preventive risk management on postoperative application and quality of life of myometrial invasive bladder cancer patients after radical surgery．Methods  A total of 66 patients with myometrial invasive bladder cancer admitted to Anyang Cancer Hospital from June 2020 to October 2023 were selected as research objects，and were divided into observation group（n=33）and control group（n=33）by lot drawing．All patients were treated with  radical total cystectomy and lymph node dissection．The control group received routine nursing care after surgery，while the observation group received preventive risk management in addition to the control group．The postoperative urine output，recovery time of gastrointestinal function，and hospitalization time between two groups were compared，as well as the shame and negative emotions before and after intervention，the incidence of postoperative complications，and the changes in quality of life between the two groups before and after intervention．Results  There was no significant difference in postoperative urine volume between the two groups of patients（P＞0.05），and the postoperative gastrointestinal function recovery time（5.27±0.82）d，postoperative hospitalization time（18.31±3.27）d were shorter than the control group［（7.25±1.12）d，（23.27±4.18）d］，with statistical significantce（t=8.194，5.369，P＜0.05）．After intervention，the Stigma Scale of Chronic Illness（SSCI），Self Rating Depression Scale（SDS），and Self-Rating Anxiety Scale（SAS）in both groups of patients decreased，and the observation group［（35.67±7.45），（40.02±2.43），（45.36±4.17）］scored lower than the control group［（48.27±10.69），（54.54±3.54），（51.37±4.38）］，statistically significant（t=5.555，19.426，5.709，P＜0.05）．The incidence of postoperative complications in the observation group was significantly lower at 9.09% compared to the control group at 30.30%（χ ² =4.690，P=0.030，P＜0.05）．After intervention，the scores of bladder cancer specific module，functional status，mental status，family/social status and physical status  related dimensions of bladder cancer patients’ quality of life scale for bladder cancer patients（FACT-BL）in both groups increased，and the observation group［（34.27±3.26），（25.11±4.23），（21.51±4.23），（25.02±4.43），（20.56±3.11）］ scored higher than the control group［（27.00±4.34），（21.11±3.24），（16.12±2.12），（21.54±5.54），（15.87±4.13）］，the comparison was statistically significant（t=7.694，4.313，6.544，2.818，5.211，P＜0.05）．Conclusions  Preventive  risk management has a significant effect on the application of myometrial invasive bladder cancer after radical surgery，which can shorten the recovery time of gastrointestinal function and hospital stay，improve patients’ negative emotions，assist in preventing postoperative complications，and improve patients’ quality of life．