Objective To investigate the characteristics of chromosome kayotypes and the relationship between the prognosis and chromosome karyotypes in subtypes of myelodysplastic syndromes (MDS).Methods The study retrospectively analyzed the characteristics of chromosome karyotype of initially diagnosed 151 MDS patients and investigated the rate and time of leukemia transformation and mortality,IPSS score,and compare the ethnic differences of Han and Uyghurs.Results Abnormal karyotype detection rate was 55.0 ％ (83/151),including simple abnormalities was 53.0 ％ (44/83),complex abnormalities was 47.0％ (39/83).h showed that common abnormal karyotype include-5/5q-,-7/7q-,+8,-20/20q-,-X/-Y,i(17q),9p-/9q-,+21.IPSS score had differences among subtypes (x2 =117.802,P ＜ 0.01).The detection rates of abnormal chromosome had significantly differences between each group,the abnormal karyotype detection rate in high-risk group was significantly higher than those in low risk group and moderate group(P ＜ 0.05).Followup 31 months (5-68 months) and found that the rates of leukemia transformation and mortality were 25.2 ％ (38/151) and 43.7 ％ (66/151),the rates of leukemia transformation and mortality in abnormal karyotype group were significantly higher than those in normal karyotype group (P ＜ 0.05).The median survival time in abnormal karyotype was shorter than that in normal one.The distribution of Han and Uyghur patients with MDS subtypes,the characteristics of abnormal karyotype,the rates of leukemia transformation and the rates of mortality had no statistical difference (all P ＞ 0.05).Conclusion Abnormal chromosome karyotype is important index for disease progression and prognosis of MDS patients.

BACKGROUND:Currently, bone marrow mesenchymal stem cel s can differentiate into nerve cel s via many approaches. Different methods for inducing bone marrow mesenchymal stem cel s differentiating into nerve cel s have different ratios. OBJECTIVE:To investigate the difference between chemical method and co-culture method to induce the differentiation of rat bone marrow mesenchymal stem cel s into nerve cel s. METHODS:Rat bone marrow mesenchymal stem cel s were isolated and purified using whole bone marrow culture method, and then randomly divided into two groups:chemical group,β-mercaptoethanol was added;co-culture group, co-cultured in a Transwel chamber. RESULTS AND CONCLUSION:Visible protrusions from induced cel s showed radiation growth at 1 week of induced culture, and neuron-specific enolase staining was positive at 2 weeks of culture. Star-like structure of nerve cel s was visible in the co-culture group within 4-5 days of culture, and then more protrusions formed. Meanwhile, the positive rate of neuron-specific enolase was (70.82±2.46)%. After 6-7 days of culture, neuron-like cel s formed and were interconnected in the chemical group;while, the positive rate of neuron-specific enolase was (52.37±1.83)%. These findings suggest that cel microenvironment plays a leading role in the differentiation of bone marrow mesenchymal stem cel s into nerve cel s, and chemical induction method is inferior to the co-culture method.

Objective To detect and analyse acquired pure red cell aplasia (PRCA) T lymphocyte subsets distribution and to assess its condition and cyclosporine immune function of T lymphocytes subsets.Methods Flow cytometry was applicated to detect peripheral blood T lymphocyte subsets of acquired PRCA patients before and after 3 months of treatment with cyclosporine-based immunosuppressive regimen and normal controls.Results Among 22 patients,17 cases of blood returning normal (three cases of bone marrow returning normal),the total effective rate was 95.5 ％ (3 cases of cure,14 cases of remission,4 cases of improvement,1 case of ineffectiveness).Th (CD3+ CD4+) cells and Th/Ts ratios in acquired PRCA patient group were lower than those in the normal control group,while Ts (CD3+ CD8+) cells was higher than that in the normal control group,the differences were statistically significant (P ＜ 0.05).After 3 months of treatment,Th cells and Th/Ts ratio were higher than those before,and Ts cells were decreased compared with the previous (P ＜ 0.05).Conclusion Disorders of T lymphocyte subsets in acquired PRCA patients lead to immune dysfunction,however,cyclosporine can improve T lymphocyte subsets in patients with imbalance,which is an effective way to treat the disease with significant curative effect and mild adverse reactions.

Objective To investigate the characteristics of the abnormal karyotype and normal karyotype with myelodysplastic syndrome(MDS).Methods A retrospective analysis of 131 MDS patients was conducted.The cell morphology between abnormal karyotype and normal karyotype was compared.Results Of 131 MDS patients,71 cases (56.5％)had clonal chromosomal abnormalities.Pelger nuclear myeloid and lymphoid small megakaryocytes in abnormal karyotype group was significantly higher than the normal karyotype group (P ＜ 0.05).Megaloblastic erythroid-like change,double-nucleated red blood cells,multinucleated red blood cells,the petals nuclear,nuclear fragmentation;the myeloid uneven particle distribution,nuclear pulp imbalance,megaloblastic degeneration,vacuoles,AUER,dual-core; single-round,multi-roundnuclear megakaryocytes,the two groups showed no significant differences (P ＞0.05).Conclusion Pelger nuclear myeloid,lymphoid small megakaryocytes had significantly higher incidence of abnormal karyotype MDS compared with normal karyotype cell dysplasia,there was some correlation between abnormal karyotype and cell morphology.

Objective To explore the correlation of the operation effects of the miorovascular decompression(MVD) and the findings on magnetic resonance tomographic angiography(MRTA) in patients of neurovascular compression of the cranial nerves.Methods Two hundred and twenty three patients treated with the microvascular decompression were analyzed retrospectively.They were grouped and graded according to the vessel compression on the cranial nerves.The compression were grouped as none, moderate and severe, and the operation effects were graded as Ⅰ ( complete relief), Ⅱ ( partial relief) and Ⅲ ( no relief).The operation effects grades were correlated according to the compression groups by Kruskal-Wallis test and the operation effects between each two of the groups were compared using Nemenyi test.P < 0.05 was defined as statistic significant.Results Of the 53 cases of non-compression group, 31 cases were graded as Ⅰ , 13 cases were graded as Ⅱ and 9 cases were graded as Ⅲ, according to the operation-effects of the decompression.Of the 110 cases of moderate group,95 cases were grade as Ⅰ , 11 cases were graded as Ⅱ and 4 cases were graded as Ⅲ.Of the 60 cases of severe group, 48 cases were graded as Ⅰ, 7 cases were graded as Ⅱ and 5 cases were graded as Ⅲ.There were statistic significance among the three groups,where χ2= 16.84 and P <0.05.The mean rank of the non-compression, the moderate and the severe group was 134.21,102.37 and 110.4 ,respectively.The difference of the mean ranks between the non-compression group and the moderate group was 31.84, and between the non-compression and the severe group was 24.17, respectively, where P < 0.05 both.Conclusions There was close relationship between the findings on magnetic resonance tomographic angiography and the operation effects of the MVD.The operation effects of patients with moderate and severe vessel compression were much better than the non-compression group.MRTA is helpful for MVD surgical indication and its prognosis.

Objective:To observe the effect of two different screening scales used by 120 dispatchers to early identify stroke patients and give telephone guidance for treatment.Methods:From October 2018 to August 2019, 2 027 stroke and suspect stroke patients who called the Kaifeng 120 Emergency Center were enrolled. The differences in the final positive rate of stroke diagnosis and the incidence of adverse events were compared and analyzed in 1 020 cases using recognition of stroke in the emergency room (ROSIER) and 1 007 cases using facial drooping, arm weakness, speech difficulties and time (FAST) scale scores for telephone guidance.Results:The positive rate of stroke identification in ROSIER score group was higher than that in FAST score group [31.4% (320/1 020) vs. 29.3% (295/1 007)], the false report rate was significantly lower than that in FAST score group [14.9% (152/1 020) vs. 18.8% (189/1 007), P < 0.05], the incidence of adverse events caused by vomiting, falling from bed and convulsions in ROSIER score group were lower than those in FAST score group [0.5% (1/208) vs. 2.2% (4/185), 0% (0/26) vs. 20.0% (2/10), 2.1% (1/48) vs. 10.3% (3/29)], however, the incidence of adverse events caused by falling out of bed was significantly lower ( P < 0.05). The incidence of total adverse events in ROSIER score group was significantly lower than that in FAST score group [0.7% (2/305) vs. 3.8% (9/235), P < 0.05]. The time of FAST score group was shorter than that of ROSIER score group (minutes: 1.2±0.2 vs. 2.5±0.3), but the difference was not statistically significant ( P > 0.05). Conclusions:Two different scales can be used to early identify stroke patients and provide timely pre-hospital guidance, thus reduce the incidence of adverse events. Although the ROSIER score takes longer time, the dispatchers guide the patients by phone which does not affect the dispatch time.

To investigate the expression of microRNA-34a (miR-34a) in patients with chronic lymphocytic leukemia (CLL) in Xinjiang Uygur and Han nationalities and its prognostic significance. Our data showed that miR-34a expression in Uygur and Han CLL patients was significantly higher than that in their respective healthy controls, while miR-34a levels were similar between Uygur and Han patients. By comparing with known prognostic factors, receiver operating characteristic (ROC) curves showed that miR-34a was a good predictive factor for the prognosis of CLL (demarcation value was 3.567 6). Survival analysis was further performed according to miR-34a expression level, that low expression of miR-34a translated into poor prognosis.

The paper reports a case of 2,8-dihydroxyadenine (2,8-DHA) crystalline nephropathy caused by mutation of adenine phosphoribosyltransferase ( APRT) gene. The female patient was 60 years old, and sought medical advice due to "foaming urine increased for half a year". Renal biopsy result showed irregular yellowish brown 2,8-DHA crystals with refraction under polarized light. 2,8-DHA crystals were found by urine sediment detection, and homozygous deletion of c.521_523delTCT on exon 5 of APRT gene was found by genetic testing. Finally this patient was diagnosed as 2,8-DHA crystalline nephropathy. Renal function improved after treatment with allopurinol. The case report aims to improve the clinician's understanding of 2,8-DHA crystalline nephropathy. Early recognition, correct diagnosis, and early drug intervention may delay the progression of renal failure and improve the prognosis.

OBJECTIVE: To screen the microRNAs (miRNAs) targeting Rictor and investigate their effects in regulating the biological behaviors of colorectal cancer (CRC). METHODS: Human colorectal cancer cell line KM12SM was transfected with the miRNAs targeting Rictor identified by prediction software to test inhibitory effects of these miRNAs on Rictor expression using qRT-PCR and Western blotting. Dual luciferase reporter assay was used to further confirm the binding of these miRNAs to the 3'UTR of Rictor mRNA. Cell survival and colony formation assays were used to investigate the effects of these miRNAs on survival and colony formation in KM12SM cells. RESULTS: miR-152 and miR-448 were identified as the Rictor-targeting miRNAs, which significantly inhibited the expression of Rictor in KM12SM cells ( < 0.05). The two miRNAs were confirmed to bind to the 3'UTR of Rictor mRNA and significantly inhibited luciferase activity in KM12SM cells ( < 0.01, < 0.05); they also showed activities of posttranscriptional modulation of Rictor. Overexpression of miR-152 and miR-448 both significantly inhibited the growth and colony formation of KM12SM cells. CONCLUSIONS miR-152 and miR-448 can down-regulate the protein expression of Rictor by targeting Rictor mRNA to negatively regulate the growth and colony formation of colorectal cancer cells.
3' Untranslated Regions ; Cell Line, Tumor ; Cell Proliferation ; Colorectal Neoplasms ; drug therapy ; Gene Expression Regulation, Neoplastic ; Humans ; MicroRNAs ; pharmacology ; Rapamycin-Insensitive Companion of mTOR Protein ; drug effects

Objective To explore the clinical characteristics of patients with diffuse large B-cell lymphoma (DLBCL) accompanied with KMT2D gene mutation and the impact of its co-mutated genes on prognosis. Methods Clinical data of 155 newly diagnosed DLBCL patients were obtained. The second-generation sequencing method was used to detect 475 hotspot genes, including KMT2D mutation. Patients were divided into the KMT2D mutation group and KMT2D wild-type group based on the presence or absence of KMT2D gene mutation. Clinical characteristics, differences in co-mutated genes, and survival differences between the two groups were compared. Results The frequency of KMT2D mutation was 31%, which is predominantly observed in elderly patients (P=0.07) and less in the double-expressor phenotype (P=0.07). Compared with the KMT2D wild-type group, KMT2D gene mutation was associated with higher co-mutation rates of CDKN2A (OR=2.82, P=0.01) and BCL2 (OR=3.84, P=0.016), while being mutually exclusive with MYC gene mutation (OR=0.11, P=0.013). In univariate survival analysis, no statistically significant difference in overall survival (OS) was found between the KMT2D mutation group and the wild-type group (P=0.54). Further analysis of the prognostic significance of KMT2D with other gene mutations indicated that patients with KMT2D^mutBTG2^mut had poorer OS than those with KMT2D^wt BTG2^mut (P=0.07) and KMT2D^wt BTG2^wt (P=0.05). On the contrary, patients with KMT2D^mut CD79B^mut had better OS than those with KMT2D^mut CD79B^wt (P=0.09), with no prognostic impact observed for other co-mutated genes. Multivariate Cox regression analysis revealed that Ann Arbor stages Ⅲ and Ⅳ (HR=2.751, 95%CI: 1.169-6.472, P=0.02), elevated LDH levels (HR=2.461, 95%CI: 1.396-4.337, P=0.002), Ki-67 index>80% (HR=1.875, 95%CI: 1.066-3.299, P=0.029), and KMT2D^mutBTG2^mut(HR=4.566, 95%CI: 1.348-15.471, P=0.015) were independent risk factors for OS in patients with DLBCL (P<0.05). Conclusion DLBCL patients with KMT2D mutation often have multiple gene mutations, among which patients with a co-mutated BTG2 gene have poor prognosis.