Hepatic vagotomy blunts liver regeneration after hepatectomy by downregulating the expression of interleukin-22

BACKGROUND Rapid regeneration of the residual liver is one of the key determinants of successful partial hepatectomy(PHx).At present,there is a lack of recognized safe,effective,and stable drugs to promote liver regeneration.It has been reported that vagus nerve signaling is beneficial to liver regeneration,but the potential mechanism at play here is not fully understood.AIM To explore the effect and mechanism of hepatic vagus nerve in liver regeneration after PHx.METHODS A PHx plus hepatic vagotomy(Hv)mouse model was established.The effect of Hv on liver regeneration after PHx was determined by comparing the liver regeneration levels of the PHx-Hv group and the PHx-sham group mice.In order to further investigate the role of interleukin(IL)-22 in liver regeneration inhibition mediated by Hv,the levels of IL-22 in the PHx-Hv group and the PHx-sham group was measured.The degree of liver injury in the PHx-Hv group and the PHx-sham group mice was detected to determine the role of the hepatic vagus nerve in liver injury after PHx.RESULTS Compared to control-group mice,Hv mice showed severe liver injury and weakened liver regeneration after PHx.Further research found that Hv downregulates the production of IL-22 induced by PHx and blocks activation of the signal transducer and activator of transcription 3(STAT3)pathway then reduces the expression of various mitogenic and anti-apoptotic proteins after PHx.Exogenous IL-22 reverses the inhibition of liver regeneration induced by Hv and alleviates liver injury,while treatment with IL-22 binding protein(an inhibitor of IL-22 signaling)reduce the concentration of IL-22 induced by PHx,inhibits the activation of the STAT3 signaling pathway in the liver after PHx,thereby hindering liver regeneration and aggravating liver injury in PHx-sham mice.CONCLUSION Hv attenuates liver regeneration after hepatectomy,and the mechanism may be related to the fact that Hv downregulates the production of IL-22,then blocks activation of the STAT3 pathway.

Expression of interleukin-22/STAT3 signaling pathway in ulcerative colitis and related carcinogenesis

AIM:To investigate the expression of interleukin (IL)-22 and its related proteins in biopsy specimens from patients with ulcerative colitis (UC) and UC-related carcinogenesis. METHODS:Biopsy specimens were obtained from patients with inactive (n = 10), mild-to-moderately active (n = 30), severely active (n = 34), initial (n = 30), and chronic UC (n = 44), as well as UC patients with dysplasia (n = 10). Specimens from patients without colonic abnormalities (n = 20) served as controls. Chronic colitis in experimental mice was induced by 2.5% dextran sodium sulfate. The expression levels of IL-22, IL-23, IL-22R1 and phosphorylated STAT3 (p- STAT3) were determined by immunohistochemistry. Bcl-2, cyclin D1 and survivin expression was detected by Western blotting. RESULTS:Patients with active UC had significantly more IL-22, IL-23, IL-22R1 and p-STAT3-positive cells than the patients with inactive UC and normal controls. Furthermore, IL-22 and related proteins were closely related to the severity of the colitis. The expression of IL-22 and IL-22R1 in the tissue of initial UC was stronger than in that of chronic UC, whereas the expression of p-STAT3 was significantly increased in chronic UC tissues. In dysplasia tissues, the expression level of IL-22 and related proteins was higher compared with controls. Mouse colitis model showed that expression of IL-22, IL-22R1 and IL-23 was increased with time, p-STAT3 and the downstream gene were also remarkably upregulated.CONCLUSION:IL-22/STAT3 signaling pathway may be related to UC and UC-induced carcinogenesis and IL-22 can be used as a biomarker in judging the severity of UC.

Interleukin-22 ameliorates acute severe pancreatitisassociated lung injury in mice

AIM: To investigate the potential protective effect of exogenous recombinant interleukin-22(r IL-22) on L-arginine-induced acute severe pancreatitis(SAP)-associated lung injury and the possible signaling pathway involved.METHODS: Balb/c mice were injected intraperitoneally with L-arginine to induce SAP. Recombinant mouse IL-22 was then administered subcutaneously to mice. Serum amylase levels and myeloperoxidase(MPO) activity in the lung tissue were measured after the L-arginine administration. Histopathology of the pancreas and lung was evaluated by hematoxylin and eosin(HE) staining. Expression of B cell lymphoma/leukemia-2(Bcl-2), Bcl-x L and IL-22RA1 m RNAs in the lung tissue was detected by real-time PCR. Expression and phosphorylation of STAT3 were analyzed by Western blot. RESULTS: Serum amylase levels and MPO activity in the lung tissue in the SAP group were significantly higher than those in the normal control group(P < 0.05). In addition, the animals in the SAP group showed significant pancreatic and lung injuries. The expression of Bcl-2 and Bcl-x L m RNAs in the SAP group was decreased markedly, while the IL-22RA1 m RNA expression was increased significantly relative to the normal control group(P < 0.05). Pretreatment with PBS did not significantly affect the serum amylase levels, MPO activity or expression of Bcl-2, Bcl-x L or IL-22RA1 m RNA(P > 0.05). Moreover, no significant differences in the degrees of pancreatic and lung injuries were observed between the PBS and SAP groups. However, the serum amylase levels and lung tissue MPO activity in the r IL-22 group were significantly lower than those in the SAP group(P < 0.05), and the injuries in the pancreas and lung were also improved. Compared with the PBS group, r IL-22 stimulated the expression of Bcl-2, Bcl-x L and IL-22RA1 m RNAs in the lung(P < 0.05). In addition, the ratio of p-STAT3 to STAT3 protein in the r IL-22 group was significantly higher than that in the PBS group(P < 0.05).CONCLUSION: Exogenous recombinant IL-22 protects mice against L-arginine-induced SAP-associated lung injury by enhancing the expression of anti-apoptosis genes through the STAT3 signaling pathway.

Interleukin-22 contributes to liver regeneration in micewith concanavalin A-induced hepatitis after hepatectomy

AIM: To investigate the therapeutic effects and mechanisms of interleukin(IL)-22 in liver regeneration in mice with concanavalin A(Con A)-induced liver injury following 70% hepatectomy.METHODS: Mice were injected intravenously with Con A at 10 μg/g body weight 4 d before 70% hepatectomy to create a hepatitis model, and recombinant IL-22 was injected at 0.125 μg/g body weight 30 min prior to 70% hepatectomy to create a therapy model. Control animals received an intravenous injection of an identical volume of normal saline.RESULTS: IL-22 treatment prior to 70% hepatectomy performed under general anesthesia resulted in reductions in the biochemical and histological evidence of liver injury, earlier proliferating cell nuclear antigen expression and accelerated recovery of liver mass. IL-22 pretreatment also significantly induced signal transducer and activator of transcription factor 3(STAT3) activation and increased the expression of a variety of mitogenic proteins, such as Cyclin D1. Furthermore, alpha fetal protein m RNA expression was significantly elevated after IL-22 treatment.CONCLUSION: In this study, we demonstrated that IL-22 is a survival factor for hepatocytes and prevents and repairs liver injury by enhancing pro-growth pathways via STAT3 activation. Treatment with IL-22 protein may represent a novel therapeutic strategy for preventing liver injury in patients with liver disease who have undergone hepatectomy.

Role of interleukin-22 in inflammatory bowel disease

Inflammatory bowel disease(IBD)is a chronic inflammatory disease thought to be mediated by the microbiota of the intestinal lumen and inappropriate immune responses.Aberrant immune responses can cause secretion of harmful cytokines that destroy the epithelium of the gastrointestinal tract,leading to further inflammation.Interleukin(IL)-22 is a member of the IL-10 family of cytokines that was recently discovered to be mainly produced by both adaptive and innate immune cells.Several cytokines and many of the transcriptional factors and T regulatory cells are known to regulate IL-22 expression through activation of signal transducer and activator of transcription 3signaling cascades.This cytokine induces antimicrobial m olecules and proliferative and antiapoptoic pathways,which help prevent tissue damage and aid in its repair.All of these processes play a beneficial role in IBD by enhancing intestinal barrier integrity and epithelial innate immunity.In this review,we discuss recent progress in the involvement of IL-22in the pathogenesis of IBD,as well as its therapeutic potential.

Interleukin-22 receptor 1 is expressed in multinucleated giant cells:A study on intestinal tuberculosis and Crohn’s disease

BACKGROUND It is challenging to distinguish intestinal tuberculosis from Crohn’s disease due to dynamic changes in epidemiology and similar clinical characteristics. Recent studies have shown that polymorphisms in genes involved in the interleukin (IL)- 23/IL-17 axis may affect intestinal mucosal immunity by affecting the differentiation of Th17 cells. AIM To investigate the specific single-nucleotide polymorphisms (SNPs) in genes involved in the IL-23/IL-17 axis and possible pathways that affect susceptibility to intestinal tuberculosis and Crohn's disease. METHODS We analysed 133 patients with intestinal tuberculosis, 128 with Crohn’s disease, and 500 normal controls. DNA was extracted from paraffin-embedded specimens or whole blood. Four SNPs in the IL23/Th17 axis (IL22 rs2227473, IL1β rs1143627, TGFβ rs4803455, and IL17 rs8193036) were genotyped with TaqMan assays. The transcriptional activity levels of different genotypes of rs2227473 were detected by dual luciferase reporter gene assay. The expression of IL-22R1 in different intestinal diseases was detected by immunohistochemistry. RESULTS The A allele frequency of rs2227473 (P = 0.030, odds ratio = 0.60, 95% confidence interval: 0.37-0.95) showed an abnormal distribution between intestinal tuberculosis and healthy controls. The presence of the A allele was associated with a higher IL-22 transcriptional activity (P < 0.05). In addition, IL-22R1 was expressed in intestinal lymphoid tissues, especially under conditions of intestinal tuberculosis, and highly expressed in macrophage-derived Langhans giant cells. The results of immunohistochemistry showed that the expression of IL-22R1 in patients with Crohn's disease and intestinal tuberculosis was significantly higher than that in patients with intestinal polyps and colon cancer (P < 0.01). CONCLUSION High IL-22 expression seems to be a protective factor for intestinal tuberculosis. IL-22R1 is expressed in Langhans giant cells, suggesting that the IL-22/IL-22R1 system links adaptive and innate immunity.

Mechanisms of interleukin-22's beneficial effects in acutepancreatitis

Acute pancreatitis(AP) is a disorder characterized by parenchymal injury of the pancreas controlled by immune cell-mediated inflammation. AP remains a significant challenge in the clinic due to a lack of specific and effective treatment. Knowledge of the complex mechanisms that regulate the inflammatory response in AP is needed for the development of new approaches to treatment, since immune cell-derived inflammatory cytokines have been recognized to play critical roles in the pathogenesis of the disease. Recent studies have shown that interleukin(IL)-22, a cytokine secreted by leukocytes, when applied in the severe animal models of AP, protects against the inflammation-mediated acinar injury. In contrast, in a mild AP model, endogenous IL-22 has been found to be a predominantly antiinflammatory mediator that inhibits inflammatory cell infiltration via the induction of Reg3 proteins in acinar cells, but does not protect against acinar injury in the early stage of AP. However, constitutively over-expressed IL-22 can prevent the initial acinar injury caused by excessive autophagy through the induction of the antiautophagic proteins Bcl-2 and Bcl-XL. Thus IL-22 plays different roles in AP depending on the severity of the AP model. This review focuses on these recently reported findings for the purpose of better understanding IL-22's regulatory roles in AP which could help to develop a novel therapeutic strategy.

Interleukin-22 ameliorates liver fibrogenesis by attenuating hepatic stellate cell activation and downregulating the levels of inflammatory cytokines

AIM:To investigate the effect of interleukin(IL)-22 onhepatic fibrosis in mice and the possible mechanism involved.METHODS:Liver fibrosis was induced in male BALB/c mice by CCl4.Recombinant IL-22(rm IL-22) was administered intraperitoneally in CCl4-treated mice.Fibrosis was assessed by histology and Masson staining.The activation of hepatic stellate cells(HSCs) was investigated by analysis of α-smooth muscle actin expression.The frequencies of T helper(Th) 22 cells,Th17 cells and Th1 cells,the expression of inflammatory cytokines [IL-22,IL-17 A,interferon-γ(IFN-γ),tumor necrosis factor-α(TNF-α),IL-6,IL-1b] and transcription factors [aryl hydrocarbon receptor(AHR),RAR-related orphan receptor(RORγt),T-bet] m RNA in the liver were investigated.In addition,the plasma levels of IL-22,IL-17 A,IFN-γ,TNF-α,IL-6 and IL-1b were evaluated.RESULTS:Significant elevations in circulating Th22 cells,Th17 cells,Th1 cells,IL-22,IL-17 A,and IFN-γ were observed in the hepatic fibrosis group compared with the control group(P < 0.01).Treatment with rm IL-22 in mice with hepatic fibrosis ameliorated the severity of hepatic fibrosis,which was confirmed by lower hepatic fibrosis pathological scores(P < 0.01).Rm IL-22 decreased the frequencies of Th22 cells(6.71% ± 0.97% vs 8.09% ± 0.74%,P < 0.01),Th17 cells(4.34% ± 0.37% vs 5.71% ± 0.24%,P < 0.01),Th1 cells(3.09% ± 0.49% vs 4.91% ± 0.73%,P < 0.01),and the levels of IL-22(56.23 ± 3.08 vs 70.29 ± 3.01,P < 0.01),IL-17A(30.74 ± 2.77 vs 45.68 ± 2.71,P < 0.01),and IFN-γ(74.78 ± 2.61 vs 124.89 ± 2.82,P < 0.01).Down-regulation of IL-22,IL-17 A,IFN-γ,TNF-α,IL-6,IL-1b,AHR RORγt,and T-bet gene expression in the liver was observed in the rm IL-22 group(P < 0.01).CONCLUSION:The frequencies of Th22,Th17 andTh1 cells are elevated in hepatic fibrosis.Rm IL-22 can attenuate HSC activation and down-regulate the levels of inflammatory cytokines,thereby ameliorating liver fibrogenesis.

The Expression of Interleukin-22 and S100A7, A8, A9 mRNA in Patients with Psoriasis Vulgaris

In order to study the expression of interleukin-22(IL-22) and S100A7,A8,A9 mRNA in the skin lesions of patients with psoriasis vulgaris and their relationship,the biopsies were taken from skin lesions in 35 patients with psoriasis vulgaris and the skin of 16 normal controls,and the expression levels of IL-22 and S100A7,A8 and A9 mRNA were detected by semi-quantitative RT-PCR.The results showed that(1) IL-22 and S100A8,A9 mRNA were positively expressed in the psoriatic skin lesions but negatively expressed in the normal controls;The expression level of S100A7 was(1.133±0.040) in the psoriatic skin lesions,significantly higher than that in the normal controls(0.744±0.037,P<0.01).(2) There were significantly positive correlations between the expression of IL-22/S100A7 mRNA,IL-22/S100A8 mRNA,IL-22/S100A9 mRNA in the psoriasis vulgaris(r1=0.543,r2=0.774,r3=0.621,P<0.01).It was concluded that IL-22 and S100A7,A8,A9 might play important roles in the occurrence and progression of psoriasis.

Interleukin-22 regulating fibrosis on mouse cardiac fibroblasts through STAT3 signaling pathway

Objective:To observe the effects of interleukin-22(IL-22)on the expression of type Ⅲ collagen,cytokines,growth factors and chemokines in mouse cardiac fibroblasts in vitro.Methods:Mouse cardiac fibroblasts were treated with0μg/L(control),1μg/L(low concentration)and 100μg/L(high concentration)IL-22,respectively.In addition,cells treated with 100μmol/L static(an STAT3 pathway inhibitor)and 100μg/L IL-22 was defined as the block group.After treatment for 48 hours,the mRNA level of collagen type Ⅲ A1(Col3-A1),matrix metalloproteinase-1(Timp-1),IL-22receptor(IL-22R),interleukin 10-related T cellderived inducible factor beta(Iltifb),fibroblast growth factor1(Fgf1)and C-C motif chemokine ligand 4(Ccl4)were determined by RT-PCR.The expression of Col3-A1 in cardiac fibroblasts was also semi-quantified by immunofluorescence.Results:Expression of Col3-A1 decreased in the low and high concentration groups,but significantly increased in the block group(all P <0.05).The expression of Timp-1increased in the low,high concentration and block groups compared with that in the control group,but it was significantly lower in the high concentration group than that in the low concentration group(P <0.05).The expression of IL-22 Rand Iltifb was significantly increased in the low,high concentration and block groups compared with that in the control group(P <0.05),but there was no statistical difference between the high concentration group and block group.The expression of Fgf1 and Ccl4 was significantly decreased in the low,high concentration and block groups compared with that in the control group(P <0.05),but there was no statistic difference between the high concentration group and block group as well.Conclusion:IL-22 effected on the expression of Col3-A1 and Timp-1,which was possibly through the JAK-STAT3 signaling pathway in mice cardiac fibroblasts.

白细胞介素-22在神经系统疾病中的研究进展

白细胞介素-22(IL-22)是炎症和感染过程中免疫细胞向组织传递信号的重要介质,在炎症中发挥双重作用。在急性感染中,短期内IL-22具有的促进细胞增殖、抑制细胞凋亡、增加黏蛋白和抗菌肽产生等能力对宿主有益;在慢性感染中,细胞增殖过度和凋亡减少可导致异常增生。IL-22可通过Janus激酶/信号转导及转录活化因子等信号通路参与缺血性脑卒中、胶质瘤等神经系统疾病的调节,可作为未来神经系统疾病调控的一个新的、可持续的研究方向,为疾病的治疗提供精准的靶点和新的策略。

血清miR-31、IL-22联合检测在儿童病毒性心肌炎诊断及预后评估中的价值

目的 研究血清微小RNA-31(miR-31)、白细胞介素-22(IL-22)在儿童病毒性心肌炎(VMC)诊断及预后评估中的价值。方法 选取2017年1月至2022年1月河南省儿童医院心血管内科收治的病毒性心肌炎患儿作为研究对象,将其命名为VMC组(n=106),另选同期在本院进行体检的健康儿童为对照组(n=70)。比较两组血清miR-31、IL-22、肌酸激酶同工酶(CK-MB)、心肌肌钙蛋白T(cTnT)及心电图参数[QRS间期、PR间期]与超声心动图参数[左室射血分数(LVEF)、左心室短轴缩短率(LVFS)];在治疗结束后对VMC患儿随访1年,以随访期间发生恢复迁延、扩张性心肌病、遗留心律失常及患儿死亡等事件为预后不良,根据多因素Logistic回归分析VMC患儿预后不良的影响因素,并绘制ROC曲线分析血清miR-31、IL-22水平对VMC患儿诊断及预后不良评估的价值。结果 VMC组的血清miR-31、IL-22、CK-MB、cTnT水平及QRS间期、PR间期均高于对照组,差异有统计学意义(P<0.05),LVEF、LVFS均低于对照组,差异有统计学意义(P<0.05);多因素Logistic回归分析显示,miR-31水平高表达、IL-22水平升高、CK-MB水平升高、cTnT水平升高、QRS间期延长、PR间期延长、LVEF降低及LVFS降低均是VMC患儿预后不良的独立危险因素(P<0.05);ROC曲线分析显示,血清miR-31、IL-22水平二者联合检测诊断VMC的曲线下面积(AUC)为0.990,优于单一检测(P<0.05);血清miR-31、IL-22水平二者联合检测评估VMC患儿预后不良的曲线下面积(AUC)为0.919,优于单一检测(P<0.05)。结论 miR-31、IL-22在病毒性心肌炎患儿血清中高表达,可能成为儿童病毒性心肌炎诊断及预后评估的辅助诊断指标。

姜酮通过激活Nrf2/HO-1信号通路减轻OGD/R后氧化应激损伤对HT22细胞凋亡的抑制作用

目的:探讨姜酮对氧糖剥夺/复糖复氧(OGD/R)后小鼠海马神经元HT22细胞的保护作用,阐明其相关作用机制。方法:培养HT22细胞,设置不同OGD/R时间梯度,建立OGD/R细胞损伤模型。HT22细胞分为对照组、OGD/R组、OGD/R+1μmol·L^(-1)姜酮组、OGD/R+10μmol·L^(-1)姜酮、OGD/R+100μmol·L^(-1)姜酮组和OGD/R+0.2%二甲亚枫(DMSO)组,CCK-8法检测各组细胞活性并计算各组细胞存活率,确定姜酮最适药物浓度。细胞分为对照组、OGD/R组、OGD/R+姜酮组和OGD/R+姜酮+核因子E2相关因子2(Nrf2)抑制剂(ML385)组,OGD/R+姜酮组细胞经姜酮给药处理4 h后予以OGD 8 h和复糖复氧8 h处理,OGD/R+姜酮+ML385组细胞在姜酮给药前予以10μmol·L^(-1)ML385预处理6 h,CCK-8法检测各组细胞活性,Western blotting法检测各组细胞中Nrf2、血红素加氧酶1(HO-1)、B细胞淋巴瘤2(Bcl-2)和Bcl-2相关X蛋白(Bax)蛋白表达水平,酶联免疫吸附试验(ELISA)法检测各组细胞培养上清中超氧化物歧化酶(SOD)活性和丙二醛(MDA)水平。结果:与对照组比较,HT22细胞经OGD 8 h和复糖复糖8 h处理后细胞存活率低于50%,以OGD 8 h和复糖复糖8 h建立HT22细胞OGD/R模型。与OGD/R组比较,OGD/R+不同剂量姜酮组细胞存活率均不同程度升高,其中OGD/R+100μmol·L^(-1)姜酮组细胞存活率升高最明显(P<0.01),故选用100μmol·L^(-1)姜酮用于后续实验。与对照组比较,OGD/R组细胞活性明显降低(P<0.01),细胞中Nrf2、HO-1和Bax蛋白表达水平明显升高(P<0.01),Bcl-2蛋白表达水平明显降低(P<0.05),细胞培养上清中SOD活性明显降低(P<0.01),MDA水平明显升高(P<0.01);与OGD/R组比较,OGD/R+姜酮组细胞活性明显升高(P<0.01),细胞中Nrf2、HO-1和Bcl-2蛋白表达水平明显升高(P<0.05或P<0.01),Bax蛋白表达水平明显降低(P<0.05),细胞培养上清中SOD活性明显升高(P<0.01),MDA水平明显降低(P<0.01);与OGD/R+姜酮组比较,OGD/R+姜酮+ML385组细胞活性明显降低(P<0.01),细胞中Nrf2、HO-1和Bcl-2蛋白表达水平明显降低(P<0.01),Bax蛋白表达水平明显升高(P<0.01),细胞培养上清中SOD活性明显降低(P<0.01),MDA水平明显升高(P<0.05)。结论:姜酮可通过激活Nrf2/HO-1信号通路减轻OGD/R后氧化应激损伤对HT22细胞凋亡的抑制作用。

酿造高粱新品种铁杂22的栽培制种技术

铁杂22(T419A/铁1202)是铁岭市农业科学院杂粮研究所以配合力高、抗倒伏、高抗丝黑穗病、高抗矮化花叶病、米质优良的长穗型不育系T419A为母本,以高产、大穗、品质优良、抗性强的恢复系铁1202为父本组配而成。其生育期122d,株高188cm,叶片数21片,高抗高粱丝黑穗病,粗蛋白含量10.38%,粗淀粉含量76.08%,单宁含量1.10%,赖氨酸含量0.23%,属晚熟酿造高粱新品种。该品种适宜于吉林省通榆,辽宁省沈阳、朝阳、铁岭及内蒙古赤峰等地区春播种植。2022年通过农业农村部非主要农作物品种登记,登记编号为GPD高粱(2022)210098。

ZSM-22分子筛合成及其正十二烷烃临氢异构化性能:模板剂和动态晶化的影响

以二乙胺(DEA)或1,6-己二胺(DAH)为模板剂,分别在静态或动态条件下合成具有不同形貌和聚集状态的ZSM-22分子筛,采用XRD、SEM、EDS、TEM、NH3-TPD及N2吸附/脱附表征手段对其进行表征分析。并负载Pt在Al2O3上和ZSM-22机械混合制备双功能催化剂,考察其正十二烷的临氢异构化反应性能。结果表明,模板剂和动态晶化会改变ZSM-22分子筛的形貌及聚集状态,并且会影响其酸性、比表面积和临氢异构活性。其中,以二乙胺为模板剂,静态晶化72h合成的ZSM-22具有最优的催化性能,在310℃反应温度下,正十二烷异构化转化率为66%时,异构十二烷的选择性达到90%。但是,模板剂及动态晶化条件对单支链异构体的产物分布影响较小,异构体产物以支链靠近端位的2-甲基十一烷为主,且随着反应温度升高,2-甲基异构体选择性明显降低。

HZSM-22的粒径调控及Pt/HZSM-22的正十二烷加氢异构催化性能

通过调控合成液中的水含量,采用过饱和溶液法,在静态水热条件下合成了三种不同c轴长度的ZSM-22分子筛,对其进行了X射线衍射、扫描电子显微镜、N2物理吸附、NH3-程序升温脱附和吡啶吸附傅里叶变换红外光谱(Py-FTIR)表征。并以所制备的ZSM-22分子筛为酸性载体,在其上负载0.5%(质量分数)的金属Pt作为加(脱)氢活性位点,制备成Pt/ZSM-22双功能催化剂。以正十二烷为探针分子,进行正构烷烃加氢异构化反应,考察了分子筛合成液中水含量对Pt/ZSM-22催化剂加氢异构化性能的影响。结果表明,随着合成液中水含量减少,ZSM-22分子筛粒径减小。但是当水含量低到一定值时,会有方英石和ZSM-5杂晶生成。当分子筛合成液摩尔组成为SiO_(2)∶Al_(2)O_(3)∶K_(2)O∶DEA∶H_(2)O=1∶0.01∶0.08∶0.29∶28时,获得的HZSM-22在所合成的三种分子筛中拥有最多的中、强Brønsted酸量以及较短的c轴长度,对应的双功能催化剂Pt/HZSM-22表现出最佳催化性能。在320℃时,正十二烷转化率为73.24%,异构烷烃收率为57.92%,异构烷烃选择性为79.09%,尤其是中心位置甲基异构体5-甲基十一烷的选择性达到了17.66%。

长链非编码RNA小核仁RNA宿主基因22调控微小RNA-27b-3p对口腔鳞状细胞癌细胞增殖、侵袭和迁移的影响

目的探究长链非编码RNA(LncRNA)小核仁RNA宿主基因(SNHG)22调控微小RNA(miR)-27b-3p对口腔鳞状细胞癌(OSCC)细胞增殖、侵袭和迁移的影响。方法收集52例OSCC患者的癌组织及癌旁组织标本,体外培养人正常口腔角质细胞HOK和3种人OSCC细胞(CAL-27、SCC-25和HSC-3),实时荧光定量聚合酶链反应(qRT-PCR)检测癌组织、癌旁组织、HOK细胞和3种OSCC细胞中SNHG22、miR-27b-3p表达情况。对SCC-25细胞进行转染并将其分为Ctrl组(未进行转染)、si-SNHG22组、si-NC组、miR-27b-3p inhibitor组、inhibitor-NC组、si-SNHG22+inhibitor-NC组和si-SNHG22+miR-27b-3p inhibitor组,检测各组SCC-25细胞增殖情况[细胞计数试剂盒8(CCK-8)法检测增殖率、流式细胞术检测增殖指数(PI)];Transwell实验检测各组SCC-25细胞侵袭情况;划痕愈合实验检测各组SCC-25细胞迁移情况;双荧光素酶实验验证SNHG22与miR-27b-3p的靶向作用关系。结果与癌旁组织比较,OSCC癌组织中SNHG22表达显著升高,miR-27b-3p表达显著降低(P<0.05);与HOK细胞比较,CAL-27、SCC-25和HSC-3细胞中SNHG22表达显著升高,miR-27b-3p表达显著降低,且SCC-25细胞中SNHG22与miR-27b-3p的表达与HOK细胞差异最大(P<0.05)。与Ctrl组比较,si-SNHG22组SCC-25细胞增殖率、PI、侵袭数和划痕面积愈合率均显著减少(P<0.05),miR-27b-3p inhibitor组SCC-25细胞增殖率、PI、侵袭数和划痕面积愈合率均显著增加(P<0.05);与si-SNHG22组比较,si-SNHG22+miR-27b-3p inhibitor组SCC-25细胞增殖率、PI、侵袭数和划痕面积愈合率均显著增加(P<0.05)。双荧光素酶实验显示SNHG22与miR-27b-3p存在靶向作用关系。结论SNHG22在OSSC中高表达,miR-27b-3p在OSSC中低表达,SNHG22可能通过海绵化miR-27b-3p促进SCC-25细胞增殖、侵袭和迁移,SNHG22/miR-27b-3p轴可能是OSCC一个新的诊断和治疗靶点。

首发精神分裂症患者血清sTfR、FGF22水平与临床症状的关系及其诊断价值

目的探讨首发精神分裂症(FES)患者血清可溶性转铁蛋白受体(sTfR)及成纤维细胞生长因子22(FGF22)表达情况,分析二者与FES患者临床症状的关系并进行诊断价值分析。方法选取2021年3月至2023年2月在该院确诊的97例FES患者作为FES组,同期选取来该院体检的96例健康志愿者作为对照组。采用免疫透射比浊法检测sTfR水平,酶联免疫吸附试验(ELISA)检测FGF22水平,Spearman法分析FES患者血清中sTfR及FGF22水平与阳性与阴性病症量表(PANSS)评分及威斯康辛卡片分类测验(WCST)结果的相关性,受试者工作特征(ROC)曲线分析sTfR及FGF22水平对FES的临床诊断价值。结果两组在性别、年龄、体质量指数、受教育年限、饮酒史及吸烟史方面差异均无统计学意义(P>0.05),与对照组比较,FES组血清sTfR及FGF22水平均下降(P<0.05)。sTfR单独诊断FES的曲线下面积(AUC)为0.835,最佳截断值为4.606 mg/L,FGF22单独诊断FES的AUC为0.772,最佳截断值为208.333μg/L,二者联合诊断的AUC(0.921)大于sTfR单独诊断的AUC(Z=2.613,P=0.009)及FGF22单独诊断的AUC(Z=5.140,P<0.001);sTfR高水平组及FGF22高水平组的PANSS阳性症状评分、阴性症状评分、病理症状评分、总评分、WCST持续性错误数、错误应答数分别低于sTfR低水平组及FGF22低水平组(P<0.05),而WCST完成分类数、WCST正确应答数分别高于sTfR低水平组及FGF22低水平组(P<0.05);FES组中sTfR、FGF22水平与PANSS阳性症状评分、阴性症状评分、病理症状评分、总评分、WCST持续性错误数、WCST错误应答数均呈负相关(P<0.05),与WCST完成分类数及WCST正确应答数均呈正相关(P<0.05)。结论FES患者血清sTfR及FGF22水平下降,联合检测sTfR及FGF22水平对于FES的临床诊断具有重要意义。

CC类趋化因子22、叉头框蛋白P1在急性髓系白血病外周血中的表达及对预后的预测价值

目的探讨急性髓系白血病(AML)病人外周血中CC类趋化因子22(CCL22)、叉头框蛋白P1(FOXP1)表达水平及其预后预测价值。方法选择2018年5月至2019年5月在孝感市中心医院、华中科技大学医学院附属同济医院及咸宁市中心医院确诊的68例AML病人设为观察组,另取同期健康体检者68例作为对照组,采用酶联免疫法测定外周血CCL22,FOXP1表达水平,分析其与临床特征的关系;采用Pearson法分析AML病人外周血中CCL22,FOXP1表达的相关性;采用Kaplan-Meier生存分析法分析CCL22,FOXP1表达与总体生存时间(OS)的关系;采用Cox比例风险回归模型分析病人预后死亡的影响因素。结果与对照组相比,观察组CCL22[(600.27±62.89)ng/L比(756.84±100.86)ng/L],FOXP1[(56.02±13.68)ng/L比(103.06±22.16)ng/L]表达均明显升高(t=10.86,14.90,均P<0.05);CCL22,FOXP1表达水平与AML病人年龄、性别、染色体预后、血红蛋白(HGB)、血小板计数(PLT)、FMS样酪氨酸激酶3-内部串联重复基因(FLT3-ITD)、核仁磷酸蛋白基因1(NPM1)突变无关(χ^(2)=0.06~2.95,均P>0.05),与脾肿大、白细胞计数(WBC)有关(χ^(2)=5.90~8.59,均P<0.05);Pearson法分析结果显示,AML病人外周血中CCL22与FOXP1表达呈正相关(r=0.27,P<0.05);Kaplan-Meier法分析结果显示,AML病人外周血CCL22,FOXP1高表达组3年生存率均低于低表达组(47.06%比70.59%,44.12%比73.53%)(χ^(2)=6.50,P<0.05);多因素logistic回归分析结果显示,CCL22,FOXP1是影响AML病人预后的独立危险因素(P<0.05)。结论CCL22,FOXP1在AML病人外周血中呈高表达,CCL22,FOXP1高表达组病人3年生存率均低于低表达组,二者有望成为AML病人预后评估的分子标志物。

急性脑梗死患者血清miR-22-3p、NLRP3水平与炎性因子及预后不良的关系

目的探讨急性脑梗死(ACI)患者血清微小核糖核酸-22-3p(miR-22-3p)、NOD样受体热蛋白结构域相关蛋白3(NLRP3)水平与炎性因子及预后不良的关系。方法选取2021年1月—2022年12月上海中医药大学附属第七人民医院神经内科收治ACI患者106例为ACI组,根据预后情况分为预后不良亚组37例和预后良好亚组69例,另选取同期体检健康者60例为健康对照组。采用实时荧光定量聚合酶链式反应检测血清miR-22-3p水平,酶联免疫吸附法检测血清NLRP3和炎性因子[白介素(IL)-1β、IL-18、肿瘤坏死因子-α(TNF-α)]水平。通过Pearson相关性分析ACI患者血清miR-22-3p、NLRP3与IL-1β、IL-18、TNF-α的相关性。分析ACI患者预后不良的影响因素,绘制2项指标的受试者工作特征(ROC)曲线分析其预测预后的价值。结果与健康对照组比较,ACI组血清miR-22-3p水平降低,NLRP3、IL-1β、IL-18、TNF-α水平显著升高(t/P=18.698/<0.001、27.091/<0.001、30.154/<0.001、35.104/<0.001、39.834/<0.001)。Pearson相关性分析显示,ACI患者血清miR-22-3p与NLRP3、IL-1β、IL-18、TNF-α水平呈负相关(r/P=-0.733/<0.001、-0.719/<0.001、-0.683/<0.001、-0.680/<0.001),血清NLRP3与IL-1β、IL-18、TNF-α水平呈正相关(r/P=0.716/<0.001、0.715/<0.001、0.707/<0.001)。多因素Logistic回归分析显示,NIHSS评分、IL-1β、IL-18、TNF-α、NLRP3升高为ACI患者预后不良的独立危险因素[OR(95%CI)=1.244(1.034~1.497)、1.373(1.067~1.767)、1.047(1.011~1.086)、1.577(1.061~2.343)、1.084(1.022~1.149)],miR-22-3p升高为独立保护因素[OR(95%CI)=0.933(0.888~0.980)]。ROC曲线分析显示,血清miR-22-3p、NLRP3水平联合预测ACI患者预后不良的曲线下面积为0.875,大于两者单独预测的0.786、0.759(Z/P=2.405/0.016、2.517/0.012)。结论ACI患者血清miR-22-3p水平降低和NLRP3水平升高,与炎性因子水平升高和预后不良密切相关,血清miR-22-3p、NLRP3水平联合对ACI患者预后不良的预测价值较高。