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Background: A growing body of research indicates significant differences between left-sided colon cancers (LCC) and right-sided colon cancers (RCC). Pan-immune-inflammation value (PIV) is a systemic immune response marker that can predict the prognosis of patients with colon cancer. However, the specific distinction between PIV of LCC and RCC remains unclear., Aim: To investigate the prognostic and clinical significance of PIV in LCC and RCC patients., Methods: This multicenter retrospective cohort study included 1510 patients with colon cancer, comprising 801 with LCC and 709 with RCC. We used generalized lifting regression analysis to evaluate the relative impact of PIV on disease-free survival (DFS) in these patients. Kaplan-Meier analysis, as well as univariate and multivariate analyses, were used to examine the risk factors for DFS. The correlation between PIV and the clinical characteristics was statistically analyzed in these patients., Results: A total of 1510 patients {872 female patients (58%); median age 63 years [interquartile ranges (IQR): 54-71]; patients with LCC 801 (53%); median follow-up 44.17 months (IQR 29.67-62.32)} were identified. PIV was significantly higher in patients with RCC [median (IQR): 214.34 (121.78-386.72) vs 175.87 (111.92-286.84), P < 0.001]. After propensity score matching, no difference in PIV was observed between patients with LCC and RCC [median (IQR): 182.42 (111.88-297.65) vs 189.45 (109.44-316.02); P = 0.987]. PIV thresholds for DFS were 227.84 in LCC and 145.99 in RCC. High PIV (> 227.84) was associated with worse DFS in LCC [PIV-high: Adjusted hazard ratio (aHR) = 2.39; 95% confidence interval: 1.70-3.38; P < 0.001] but not in RCC (PIV-high: aHR = 0.72; 95% confidence interval: 0.48-1.08; P = 0.114)., Conclusion: These findings suggest that PIV may predict recurrence in patients with LCC but not RCC, underscoring the importance of tumor location when using PIV as a colon cancer biomarker., Competing Interests: Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)

Immune checkpoint inhibitors (ICIs) have transformed cancer therapy, yet persistent challenges such as low response rate and significant heterogeneity necessitate attention. The pivotal role of the major histocompatibility complex (MHC) in ICI efficacy, its intricate impacts and potentials as a prognostic marker, warrants comprehensive exploration. This study integrates single-cell RNA sequencing (scRNA-seq), bulk RNA-seq, and spatial transcriptomic analyses to unveil pan-cancer immune characteristics governed by the MHC transcriptional feature (MHC.sig). Developed through scRNA-seq analysis of 663,760 cells across diverse cohorts and validated in 30 solid cancer types, the MHC.sig demonstrates a robust correlation between immune-related genes and infiltrating immune cells, highlighting its potential as a universal pan-cancer marker for anti-tumor immunity. Screening the MHC.sig for therapeutic targets using CRISPR data identifies potential genes for immune therapy synergy and validates its predictive efficacy for ICIs responsiveness across diverse datasets and cancer types. Finally, analysis of cellular communication patterns reveals interactions between C1QC + macrophages and malignant cells, providing insights into potential therapeutic agents and their sensitivity characteristics. This comprehensive analysis positions the MHC.sig as a promising marker for predicting immune therapy outcomes and guiding combinatorial therapeutic strategies., Competing Interests: Declaration of competing interest All authors declare no potential conflicts of interest., (Copyright © 2024 Elsevier B.V. All rights reserved.)

Cardioembolic stroke, characterized by severe illness, poor prognosis, and high recurrence rate, is one of the important causes of ischemic stroke. In the field of genetic research, numerous genes associated with cardioembolic stroke have been identified, and their potential in predicting disease risk and evaluating risk factors has been progressively explored. Here, we provide an overview of the latest advancements in genetics for cardioembolic stroke, including genome-wide association studies, copy number variation studies, whole-genome sequencing studies. Furthermore, we also summarize the application of genetic datasets in polygenic risk score and Mendelian randomization. The aim of this overview is to provide insights and references from multiple perspectives for future investigations on the genetic information for cardioembolic stroke.

Background: According to the latest report, colorectal cancer is still one of the most prevalent cancers, with the third highest incidence and mortality worldwide. Treatment of advanced rectal cancer with distant metastases is usually unsatisfactory, especially for mismatch repair proficient (pMMR) rectal cancer, which leads to poor prognosis and recurrence., Case Summary: We report a case of a pMMR rectal adenocarcinoma with metastases of multiple lymph nodes, including the left supraclavicular lymph node, before treatment in a 70-year-old man. He received full courses of chemoradiotherapy (CRT) followed by 4 cycles of programmed death 1 inhibitor Tislelizumab, and a pathologic complete response (pCR) was achieved, and the lesion of the left supraclavicular lymph node also disappeared., Conclusion: pMMR advanced rectal cancer with preserved intact distant metastatic lymph nodes may benefit from full-course CRT combined with immunotherapy., Competing Interests: Conflict-of-interest statement: The authors declare that they have no conflict of interest., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)

Background: Sacubitril/valsartan has been approved for the treatment of heart failure (HF) patients with reduced ejection fraction; since then, it gradually became a new star drug in the therapy of HF. Nevertheless, the effectiveness of sacubitril/valsartan remains under investigation. Thus far, only a few bibliometric studies have systematically analyzed the application of sacubitril/valsartan., Methods: Publications on sacubitril/valsartan were retrieved from the Web of Science Core Collection on April 29, 2021. Data were analyzed using Microsoft Excel 2019 (Redmond, WA), VOS viewer (Redmond, WA), and Cite Space V (Drexel University, Philadelphia, PA)., Results: A total of 1309 publications on sacubitril/valsartan published from 1995 to 2021 were retrieved. The number of publications regarding sacubitril/valsartan increased sharply in the last 6 years (2015-2021), and American scholars authored >40% of those publications. Most were published in the European Journal of Heart Failure, the United States was the bellwether with a solid academic reputation in this area. Solomon published the highest number of related articles and was the most frequently cited author. "Heart failure" was the leading research hotspot. The keywords, "inflammation," "fibrosis," and "oxidative stress" appeared most recently as research fronts., Conclusions: Research attention should be focused on clinical trial outcomes. Considering its effectiveness in HF, the mechanisms and further applications of sacubitril/valsartan may become research hotspots in the future and should be closely examined., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.)

Spinal cord injury (SCI) is a common pathology often resulting in permanent loss of sensory, motor, and autonomic function. Numerous studies in which stem cells have been transplanted in biomaterial scaffolds into animals have demonstrated their considerable potential for recovery from SCI. In the present study, a three-dimensional porous silk fibroin (SF) scaffold with a mean pore size of approximately 383 μm and nanofibrous structure was fabricated, the silk scaffold enabling the enhanced attachment and proliferation of bone marrow stromal cells (BMSCs). Investigation of its therapeutic potential was conducted by implantation of the nanofibrous SF scaffold seeded with BMSCs into a transected spinal cord model. Recovery of the damaged spinal cord was significantly improved after 2 months, compared with a non-nanofibrous scaffold, in combination with decreased glial fibrillary acidic protein (GFAP) expression and improved axonal regeneration at the site of injury. Furthermore, elevated Basso-Beattie-Bresnahan (BBB) scores indicated greatly improved hindlimb movement. Together, these results demonstrate that transplantation of neural scaffolds consisting of nanofibrous SF and BMSCs is an attractive strategy for the promotion of functional recovery following SCI.

Proliferation of vascular smooth muscle cells (VSMCs) participates in multiple cardiovascular disorders, while the mechanism remains unclear. This study aims to investigate the effects of insulin on VSMC. Insulin was used to stimulate rat VSMCs, and the effects on cell cycle and proliferation were subsequently analyzed using flow cytometry. Furthermore, AP-1 and SM-α overexpression vectors were constructed and transfected into VSMCs. AP-1 and SM-α were inhibited by SR11302 and SM-α siRNA, respectively. The mRNA and protein expression levels were subsequently detected using the reversetranscription quantitative polymerase chain reaction and western blotting, respectively. AP-1 and SM-α gene promoter binding sites were determined using luciferase and chromatin immunoprecipitation assays. As a result, we found that high dose of insulin promoted proliferation of VSMCs and increased the percentage of cells in the S phase by downregulating AP-1. AP-1 was identified to bind to the SM-α gene promoter at locus 2-177 to upregulate SM-α gene expression. Inhibition of AP-1 led to the decrease of SM-α expression. Overexpression of SM-α directly suppressed proliferation of VSMCs, while knocking it down promoted the process. Therefore, this study revealed that insulin downregulated the expression of the SM-α gene by inhibiting AP-1, which in turn facilitated proliferation of VSMCs., (Copyright 2020 Biolife Sas. www.biolifesas.org.)

Objectives: We aimed to determine predictors of mortality within 90 days and develop a simple score for patients with mechanical thrombectomy (MT)., Design: Analysis of a multicentre prospective registry., Setting: In six participating centres, patients who had an acute ischaemic stroke (AIS) treated by MT between March 2017 and May 2018 were documented prospectively., Participants: 224 patients with AIS were treated by MT., Results: Of 224 patients, 49 (21.9%) patients died, and 87 (38.8%) were independent. Variables associated with 90-day mortality were age, previous stroke, admission National Institutes of Health Stroke Scale (NIHSS), fasting blood glucose and occlusion site. Logistic regression identified four variables independently associated with 90-day mortality: age ≥80 years (OR 3.26, 95% CI 1.45 to 7.33), previous stroke (OR 2.33, 95% CI 1.04 to 5.21), admission NIHSS ≥18 (OR 2.37, 95% CI 1.13 to 4.99) and internal carotid artery or basilar artery occlusion (OR 2.92, 95% CI 1.34 to 6.40). Using these data, we developed predicting 90-day mortality of AIS with MT (PRACTICE) score ranging from 0 to 6 points. The receiver operator curve analysis found that PRACTICE score (area under the curve (AUC)=0.744, 95% CI 0.669 to 0.820) was numerically better than iScore (AUC=0.661, 95% CI 0.577 to 0.745) and Predicting Early Mortality of Ischemic Stroke score (AUC=0.638, 95% CI 0.551 to 0.725) for predicting 90-day mortality., Conclusions: We developed a simple score to estimate the 90-day mortality of patients who had an AIS treated with MT. But the score needs to be prospectively validated., Trial Registration Number: Chinese Clinical Trial Registry (ChiCTR-OOC-17013052)., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Background and Objectives: Although fish consumption or omega-3 intake is associated with cardio- cerebrovascular disease including stroke, their correlation is still controversial. Therefore, this meta-analysis is to identify the relationship between the risk of stroke and fish consumption or omega-3 intake., Methods and Study Design: We searched the PubMed, EMBASE and Cochrane Library databases as of May 2019. Multivariateadjusted risk ratios (RRs) with 95% confidence interval (CI) for stroke in different level intake of fish or Longchain omega-3 polyunsaturated fatty acids (LC ω3-PUFAs) were pooled using a random-effects meta-analysis. A dose-response analysis was conducted with the 2-stage generalized least-squares trend program., Results: Our meta-analysis identified a total of 17 prospective cohort studies including 14986 strokes events in 672711 individuals. Meta-analysis revealed that the higher fish consumption was significantly associated with lower risk of stroke (RR=0.871, 95% CI: 0.779-0.975, p=0.016), especially with ischemic stroke (RR=0.808, 95% CI: 0.696- 0.937, p=0.005). Meantime, the combined RR of total stroke was 0.859 (95% CI: 0.769-0.959, p=0.007) for the highest versus lowest intake of LC ω3-PUFAs, and stratification analysis showed that higher LC ω3-PUFAs intake was associated with reduced stroke risk in women (RR=0.793, 95% CI: 0.706-0.891, p=0.000) but not in men. In addition, the dose-response analysis showed fish consumption with 1000g per month and LC ω3-PUFAs intake with 0.5g per month was associated with 17.3% (RR=0.927, 95% CI: 0.83-0.98) and 14% (RR=0.86, 95% CI: 0.78-0.95) lower risk of stroke, respectively., Conclusions: Both fish consumption and LC ω3-PUFAs intake were negatively associated with the risk of stroke, especially in women, which suggest that increased intake of fishery products and LC ω3-PUFAs may benefit primary prevention of stroke.

Infectious hypodermal and haematopoietic necrosis virus (IHHNV) is a major viral pathogen in cultured penaeid shrimp. IHHNV has many hosts, mainly including crustaceans. It has recently been reported that Procambarus clarkii can be infected by IHHNV. In the present study, we studied the hepatopancreas of P. clarkii by transcriptome high-throughput sequencing to analyze the response of P. clarkii to IHHNV infection. After de novo assembly, there were 400,340,760 clean reads. A total of 237 differentially expressed genes (DEGs) were obtained, including 77 significantly up-regulated unigenes and 160 significantly down-regulated ones. The expression levels of 12 immune-related DEGs were validated by qRT-PCR, substantiating the reliability of RNA-Seq results. The enrichment analysis of DEGs showed that the immune-related pathways were closely related to apoptosis and phagocytosis. Moreover, a large number of pathways related to metabolic function were down-regulated, suggesting that IHHNV infection might affect the growth of P. clarkii., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

Background: CC chemokine ligand 18 (CCL18) is a chemotactic cytokine involved in the pathogenesis and progression of various cancers. Our previous research showed that the expression of CCL18 is obviously higher in non-small cell lung cancer (NSCLC) than in the adjacent normal tissues, suggesting its role in NSCLC., Methods: We further examined the serum level of CCL18 in 80 NSCLC patients with enzyme-linked immunosorbent assay and simultaneously analyzed the survival curve of these patients by the Kaplan-Meier method, and then utilized a log-rank test to evaluate the correlation of CCL18 expression with the malignant progression of NSCLC., Results: Our results showed that the median serum concentration of CCL18 was significantly elevated to 436.11 ng/mL in NSCLC patients compared to 41.97 ng/ml in healthy people ( P <0.01), which was also positively related to the expression of lung cancer biomarkers carcinoma-embryonic antigen and cytokeratin fragment antigen 21-1. Moreover, correlation analysis showed that an increased level of serum CCL18 was associated with a worse survival time in NSCLC patients., Conclusion: Our findings suggest that the serum CCL18 level of NSCLC patients was negatively correlated with the prognosis, thus suggesting that CCL18 may serve as a potential circulating biomarker for NSCLC diagnosis.

Objective: To explore relationships between the enrichment of ETBF, Fn, Hp in feces, tissues and colorectal cancer. Methods: Feces, lesion tissue and adjacent tissue from 24 patients with colorectal cancer and 31 patients with adenomas were collected, and we collected Feces and tissue of 20 healthy control persons. Then the copy numbers of enterotoxigenic B. fragilis (ETBF), Fusobacterium nucleatum (Fn) and Helicobacter pylori (Hp) were determined by quantitative real-time PCR. Immunohistochemical method was used to examine the expression intensity of EGFR and p53, and the relationships between different expression intensity of EGFR, p53 and the numbers of three bacterias. Results: In the feces, copy numbers of ETBF and Fn were as follous: colorectal cancer group>adenomas group>healthy control group ( P <0.05). Copy numbers of Hp were as follous: colorectal cancer group>healthy control group ( P <0.01); adenomas group>healthy control group ( P <0.01). In the tissue, copy numbers of ETBF, Fn were as follows: colorectal cancer group>adenomas group>healthy control group ( P <0.05). Copy numbers of Hp were as follows: colorectal cancer group>healthy control group ( P <0.01); adenomas group>healthy control group ( P <0.01). Copy numbers of those three bacteria in the lesion tissue and the adjacent tissue had no significant difference. This happened both in colorectal cancer group and adenomas group. The different expression intensity of EGFR, p53 and the number of three bacteria showed no obviously statistical correlation( P >0.05). Conclusion: Adenomatous polyp and colorectal cancer patients show high enrichment of ETBF, Fn and Hp in both feces and tissues. ETBF, Fn and Hp probably contribute to the development of adenomatous polyp and colorectal cancer. Trial registration Chinese Clinical Trial Registry, ChiCTR-BOC-17012509.

Four new diphenyl ether derivatives, sinopestalotiollides A-D (1-4), one new natural α-pyrone product (11), as well as twelve known compounds (5-1 7), were obtained from the ethyl acetate extract of the endophytic fungus Pestalotiopsis palmarum isolated from the leaves of medicinal plant Sinomenium acutum (Thunb.) Rehd et Wils. The structures were elucidated by HR-ESI-MS and NMR spectrometry data. Bioassay experiments revealed that compounds 1-4 and 11 exhibited strong to weak cytotoxicities against three human tumor cell lines Hela, HCT116 and A549., (Copyright © 2017 Elsevier Ltd. All rights reserved.)

Although a number of studies have been conducted on the association between HTR2A T102C polymorphism and major depressive disorder (MDD) in Chinese, this association remains elusive and controversial. To clarify the effects of HTR2A T102C polymorphism on the risk of MDD, a meta-analysis was performed in the Chinese population. Related studies were identified from PubMed, Springer Link, Ovid, Chinese Wanfang Data Knowledge Service Platform, Chinese National Knowledge Infrastructure (CNKI), and Chinese Biology Medicine (CBM) till 5 May 2015. The odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to estimate the strength of the associations. Statistical analyses were conducted with Version 10.0 STATA statistical software. A total of 12 case-control studies including 1444 MDD cases and 1445 controls were involved in this meta-analysis. Overall, no significant association with MDD risk was provided in the Chinese population (C vs. T: OR=0.97, 95% CI: 0.81-1.17, 95%; CC vs. TT: OR=0.95, 95% CI: 0.65-1.37; CC+TC vs. TT: OR=0.96, 95% CI: 0.75-1.12; CC vs. TT+TC: OR=0.94, 95% CI: 0.78-1.12). In subgroup analyses stratified by geographic area and source of controls, no significant association was found in any of the subgroups. In conclusion, this meta-analysis indicate that the HTR2A T102C polymorphism is not associated with susceptibility to MDD in Chinese population.

Purpose: To investigate the effects of epigallocatechin-3-gallate (EGCG) on the expression of HIF-1α and vascular endothelial growth factor (VEGF) and cell growth in MCF-7 breast cancer cells., Methods: MCF-7 human breast cancer cells were pretreated with different concentrations of EGCG (25, 50, 100 mg/L) for 48 h. The growth and proliferation of cells were analyzed by trypan blue staining in the pretreated MCF-7 cells. Furthermore, mRNA expression of HIF-1α and VEGF was detected by reverse transcriptase polymerase chain reaction (RT-PCR) analysis in the pretreated MCF-7 cells. Protein expression of HIF-1α was detected by Western blot, and the secreted protein level of VEGF in the supernatant of the culture medium was analyzed by enzyme linked immuno- sorbent assay (ELISA) in the MCF-7 cells pretreated with different concentrations of EGCG., Results: Cell growth decreased dramatically in MCF-7 cells treated with different concentrations of EGCG, compared with untreated (control) cells. Moreover, protein expression of HIF-1α and VEGF declined in a dose-dependent manner in MCF-7 cells pretreated with increasing concentrations of EGCG., Conclusions: EGCG inhibits cell growth and proliferation of MCF-7 breast cancer cells, possibly by inhibiting the protein expression of HIF-1α and VEGF.

Background: Esculentoside A (EsA) is a saponin isolated from the Chinese herb Phytolacca esculenta. In our study, we sought to investigate the protective effects of EsA on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice., Materials and Methods: To determine the effects of EsA on the reduction of histopathologic changes in mice with ALI, inflammatory cell count in bronchoalveolar lavage fluid (BALF) and lung wet-to-dry weight ratio were measured in LPS-challenged mice, and lung histopathologic changes observed via paraffin section were assessed. Next, cytokine production induced by LPS in BALF was measured by enzyme-linked immunosorbent assay. To further study the mechanism of EsA protective effects on ALI, IκBa, p38, and extracellular signal receptor-activated kinase pathways were investigated in lung tissue of mice with ALI., Results: In the present investigation, EsA showed marked effects by reducing inflammatory infiltration, thickening of the alveolar wall, and pulmonary congestion. Levels of tumor necrosis factor α and interleukin 6 elevated by LPS were significantly decreased in BALF in EsA-pretreated ALI model. Furthermore, EsA significantly suppressed phosphorylation of IκBa, p38, and extracellular signal receptor-activated kinase., Conclusions: Taken together, our results suggest that EsA suppressed inflammatory responses in LPS-induced ALI through inhibition of the nuclear factor kappa B and mitogen activated protein kinase signaling pathways. EsA may be a promising potential preventive agent for ALI treatment., (Copyright © 2013 Elsevier Inc. All rights reserved.)

Phillyrin (Phil) is one of the main chemical constituents of Forsythia suspensa (Thunb.), which has shown to be an important traditional Chinese medicine. We tested the hypothesis that Phil modulates pulmonary inflammation in an ALI model induced by LPS. Male BALB/c mice were pretreated with or without Phil before respiratory administration with LPS, and pretreated with dexamethasone as a control. Cytokine release (TNF-α, IL-1β, and IL-6) and amounts of inflammatory cell in bronchoalveolar lavage fluid (BALF) were detected by ELISA and cell counting separately. Pathologic changes, including neutrophil infiltration, interstitial edema, hemorrhage, hyaline membrane formation, necrosis, and congestion during acute lung injury in mice were evaluated via pathological section with HE staining. To further investigate the mechanism of Phil anti-inflammatory effects, activation of MAPK and NF-κB pathways was tested by western blot assay. Phil pretreatment significantly attenuated LPS-induced pulmonary histopathologic changes, alveolar hemorrhage, and neutrophil infiltration. The lung wet-to-dry weight ratios, as the index of pulmonary edema, were markedly decreased by Phil pretreatment. In addition, Phil decreased the production of the proinflammatory cytokines including (TNF-α, IL-1β, and IL-6) and the concentration of myeloperoxidase (MPO) in lung tissues. Phil pretreatment also significantly suppressed LPS-induced activation of MAPK and NF-κB pathways in lung tissues. Taken together, the results suggest that Phil may have a protective effect on LPS-induced ALI, and it potentially contributes to the suppression of the activation of MAPK and NF-κB pathways. Phil may be a new preventive agent of ALI in the clinical setting., (© 2013 Elsevier B.V. All rights reserved.)

Purpose: The aim of this study was to construct a recombinant lentiviral expression vector targeting human BAX inhibitor- 1(BI-1) gene and observe its expression in NIH3T3 cells., Methods: Human BI-1 gene was amplified by polymerase chain reaction (PCR), and then cloned into the vector pLCMV- IG using DNA recombinant technique. After the inserted sequences in the recombinant plasmids were identified by PCR, and double digesting and DNA sequencing analysis, the recombinant lentivirus was packaged and administered into NIH3T3 cells. The BI-1 mRNA and protein expression were examined by real-time reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting., Results: PCR double digesting analysis and DNA sequencing confirmed that the BI-1 DNA sequences were successfully inserted into the lentiviral vectors. After transfection with the recombinant lentivirus, BI-1 expression in NIH3T3 cells was significantly increased at both mRNA and protein levels., Conclusion: The lentiviral vector expressing BI-1 has been successfully constructed, which allowed for the subsequent analysis of the role of BI-1 in cell growth and transduction.

The aim of this study was to investigate the expression of histone demethylase lysine specific demethylase1 (LSD1) in patients with acute leukemia (AL) and its clinical significance. LSD1 protein expression level was detected by semi-quantitative Western blot in HL-60 and SHI-1 leukemia cell line, in bone marrow mononuclear cells of acute AL patients with different condition [new diagnosis, complete remission (CR) and relapse] and in patients with non malignant hematopathy (control). Clinical data of AL patient followed up was collected. The relationship of LSD1 expression level with clinical prognosis was analyzed. The results showed that in HL-60 and SHI-1 leukemia cell line, LSD1 expression was strong positive, relative amount (LSD1/β-actin gray level rate) was 4.647 ± 3.840 and 1.628 ± 0.185 (n = 4) respectively. In 72 AL patients, LSD1 expression levels were quite different. LSD1 positive rate was 56.9% (41/72), average relative amount was 1.053 ± 1.976. In 17 controls, LSD1 positive rate was 0%, relative amount was 0.004 ± 0.012. The LSD1 positive rate in newly diagnosed AML or ALL group (90.4%, 77.8%) and refractory/relapse AML or ALL group (100%, 100%) was higher than that in AML or ALL CR group (4.7%, 0%) (p = 0.000), relative amount of LSD1 showed no statistically difference between newly diagnosed AML and ALL groups (1.177 ± 1.646, 1.275 ± 1.845) or refractory/relapse group (2.050 ± 2.470, 4.107 ± 3.676) and CR group (0.029 ± 0.033, 0.019 ± 0.024) (p > 0.05). In all AL patients, LSD1 positive rate in newly diagnosed (84.6%) and refractory/relapse groups (100%) was higher than that in CR group (3.8%). LSD1 relative amount in newly diagnosed group (1.274 ± 1.760), refractory/relapse group (3.359 ± 3.319) and CR group (0.027 ± 0.031) was higher than that in control group (p < 0.01), and in refractory/relapse group was higher than that in newly diagnosed group and CR group (p < 0.01), in newly diagnosed group was higher than that in CR group (p < 0.01). It is concluded that overexpression of LSD1 is correlated with refractory or relapse in AL. LSD1 expression level can reflect disease status of AL patients and may be a predictive biomarker for unfavourable prognosis of AL.

v-Src is a non-receptor protein tyrosine kinase involved in many signal transduction pathways and closely related to the activation and development of cancers. We present here the expression, purification, and bioactivity of a GST (glutathione S-transferase)-fused v-Src from a bacterial expression system. Different culture conditions were examined in an isopropyl beta-D-thiogalactopyranoside (IPTG)-regulated expression, and the fused protein was purified using GSH (glutathione) affinity chromatography. ELISA (enzyme-linked immunosorbent assay) was employed to determine the phosphorylation kinase activity of the GST-fused v-Src. This strategy seems to be more promising than the insect cell system or other eukaryotic systems employed in earlier Src expression.

Beta-1,4-galactosyltransferase (beta4Gal-T) (EC 2.4.1.38) plays a multifunctional role in many aspects of normal cell physiology. By now, several dozens of beta4Gal-T genes have been cloned, separated from mouse, chick, bovine, human, etc. This paper presents the cloning and GST-fused expression of mouse beta4Gal-T gene in Escherichia coli (E. coli). The target gene was cloned by PCR, followed by identification by DNA sequencing and expression in E.coli with isopropyl-beta-D-thiogalactoside (IPTG) gradient concentrations, products of which were separated on SDS-PAGE showing that the target protein had the same molecular weight as that of mouse beta4Gal-T. The transcriptional product of beta4Gal-T gene was proved by Western hybridization analysis to be due to GST-fusion.