134 results on '"Li Xiao Xu"'
Search Results
2. Rapid On-Site Screening of Prohibited Substances in Spray Cosmetics Using Dielectric Barrier Discharge Ionization and a Miniature Mass Spectrometer
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GUO Xiang-yu, SI Nian-peng, HUA Yun-chen1, LI Xiao-xu, BAI Hua, and MA Qiang
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dielectric barrier discharge ionization (dbdi) ,miniature mass spectrometry ,rapid screening ,prohibited substances ,spray cosmetics ,Chemistry ,QD1-999 - Abstract
The development and application of ambient ionization and miniature mass spectrometry have become the current research hotpot, which is capable of rapid, sensitive, on-site and real-time analysis of samples without complex sample pretreatment. In this study, a rapid on-site method using dielectric barrier discharge ionization (DBDI) and a miniature mass spectrometer was developed for the screening of prohibited substances in spray cosmetics. Helium gas was used as the discharge gas and 1 mm thick quartz glass was used as the dielectric barrier in a custom-made DBDI ion source. The two brass electrodes were 10 mm apart, both mounted outside the quartz glass. The inner diameter of the glass tube at the gas inlet and outlet was 1 mm. When the experiment was carried out, the DBDI ion source was placed 3 cm in front of the discontinuous atmospheric pressure interface (DAPI) of the miniature mass spectrometer. The spray cosmetic sample was placed 8 cm directly above the plasma beam generated by the DBDI. Without any sample pretreatment, once the sample spray valve was pressed, the sample microdroplets generated in the vertical direction collided with the plasma beam generated in the horizontal direction. In the region between the DBDI and the miniature mass spectrometer, the target substances were ionized by energy and charge transfer with the plasma beam, and then detected by the miniature mass spectrometer. The helium flow rate was set at an optimum value of 220 mL/min by a gas mass flow controller. Coupled with the miniature mass spectrometer, four prohibited colorants in disposable hair dye spray and four prohibited fragrances in spray lotion were screened. Based on the observed signal-to-noise ratio (S/N) of the most intense MS/MS fragment peaks and using S/N=3 as a criterion, the limits of detection (LODs) were estimated between 10 and 50 μg/kg for the eight prohibited substances. The entire analysis procedure could be completed within 1 min. The simplified analytical protocol can effectively solve the disadvantages of traditional analytical methods that are cumbersome and time-consuming. The proposed method is simple, rapid, sensitive, efficient, and suitable for rapid on-site screening of prohibited substances in spray cosmetics.
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- 2023
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3. Night ventilation scheme optimization for an Ultra-low energy consumption building in Shenyang, China
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Li, Xiao-Xu, Huang, Kai-Liang, Feng, Guo-Hui, Li, Wan-Yu, and Wei, Jia-Xing
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- 2022
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4. Design and Performance Evaluation of Asymmetric Hyperboloid Linear Ion Trap
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WU Hui, ZHU Wen-fei, GE Sai-jin, ZHANG Ying-jun, YAO Ru-jiao, and LI Xiao-xu
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asymmetric hyperboloid linear ion trap ,stretching ,radio frequency electric field ,ion unidirectional ejection ,ion detection efficiency ,Chemistry ,QD1-999 - Abstract
Hyperbolic electrode linear ion trap is a good choice as the mass analyzer of miniaturized ion trap mass spectrometer for the reason that it has a compact size and excellent performance. However, ions are ejected from both opposite directions along the x-axis for existing hyperbolic electrode linear ion trap, which means that the ion detection efficiency could not be higher than 50% if only one ion detector is employed in the miniaturized ion trap mass spectrometer. This symmetrical structure significantly influences the analysis performance of hyperbolic electrode linear ion trap and limits the application at miniaturized ion trap mass spectrometer. Therefore, in order to further improve the ion detection efficiency of the ion trap, an asymmetric hyperboloid linear ion trap structure was proposed. By optimizing the unidirectional stretching distance Δra of the x-axis electrode in the direction of ion ejection after the optimization to the stretching distances Δrx of both x axis electrodes, a reasonable asymmetric radio frequency electric field was introduced for improving ion unidirectional ejection efficiency. The samples used in the simulation experiments were ions with m/z 609, 610 and 611. The internal electric field distribution, ion motion trajectory and simulated mass spectra peak of the asymmetric hyperboloid linear ion trap for different electrode structures were analyzed by simulation software SIMION and AXSIM. Then the ion unidirectional ejection efficiency and mass resolution were calculated, and the data were drawn as line charts. The simulation results showed that on the basis of the optimized symmetrical hyperboloid ion trap structure, whose x-axis electrodes were both stretched by Δrx=0.9 mm, an ion unidirectional ejection efficiency of over 90% and a mass resolution over 5 100 for m/z 610 were achieved by optimizing the parameters such as AC frequency and scanning rate, when one of the x-axis electrodes was unidirectionally stretched by Δra=0.8 mm. In addition, under the condition of ions with large m/z 1 890, a mass resolution up to 10 590 and an ion unidirectional ejection efficiency of 93.3% were achieved when Δra=0.7 mm. It proved that the asymmetric hyperboloid linear ion trap with the optimized geometric structure could greatly improve the ion detection efficiency with only one ion detector under the guarantee of high mass resolution, which had a significant advantage for developing miniaturized ion trap mass spectrometer in the future. On the whole, the research could provide a theoretical foundation for further investigations, but there were still some problems to be solved, such as the actual processing, assembly and experiment.
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- 2021
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5. Tank-mixing adjuvants enhanced the efficacy of fludioxonil on cucumber anthracnose by ameliorating the penetration ability of active ingredients on target interface
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Li, Xiao-xu, He, Li-fei, Pang, Xiu-yu, Gao, Yang-yang, Liu, Yang, Zhang, Peng, Wei, Guang, Mu, Wei, Li, Bei-xing, and Liu, Feng
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- 2021
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6. Predictive value of early amplitude integrated electroencephalogram (aEEG) in sleep related problems in children with perinatal hypoxic-ischemia (HIE)
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Qiuyan Tian, Yizhi Pan, Zheng Zhang, Mei Li, Li-xiao Xu, Min Gong, Po Miao, Xiaolu Jiang, Xiaofeng Yang, Chen-Xi Feng, Jian Pan, Yun Yu, Bin Sun, and Xin Ding
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Hypoxic-Ischemic encephalopathy (HIE) ,Sleep problems ,aEEG ,Circadian rhythmic issues ,Correlation ,Pediatrics ,RJ1-570 - Abstract
Abstract Background While great attention has been paid to motor and cognitive impairments in children with neonatal Hypoxic-Ischemic Encephalopathy (HIE), sleep related circadian rhythm problems, although commonly present, are often neglected. Subsequently, no early clinical indicators have been reported to correlate with sleep-related circadian dysfunction during development. Methods In this study, we first analyzed patterns of the amplitude integrated electroencephalogram (aEEG) in a cohort of newborns with various degrees of HIE. Next, during follow-ups, we collected information of sleep and circadian related problems in these patients and performed correlation analysis between aEEG parameters and different sleep/circadian disorders. Results A total of 101 neonates were included. Our results demonstrated that abnormal aEEG background pattern is significantly correlated with circadian rhythmic (r = 0.289, P = 0.01) and breathing issues during sleep (r = 0.237, P = 0.037). In contrast, the establishment of sleep–wake cycle (SWC) showed no correlation with sleep/circadian problems. Detailed analysis showed that summation of aEEG score, along with low base voltage (r = 0.272, P = 0.017 and r = -0.228, P = 0.048, respectively), correlates with sleep circadian problems. In contrast, background pattern (BP) score highly correlates with sleep breathing problem (r = 0.319, P = 0.004). Conclusion Abnormal neonatal aEEG pattern is correlated with circadian related sleep problems. Our study thus provides novel insights into predictive values of aEEG in sleep-related circadian problems in children with HIE.
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- 2021
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7. TP53-induced glycolysis and apoptosis regulator alleviates hypoxia/ischemia-induced microglial pyroptosis and ischemic brain damage
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Lan-Lan Tan, Xiao-Lu Jiang, Li-Xiao Xu, Gen Li, Chen-Xi Feng, Xin Ding, Bin Sun, Zheng-Hong Qin, Zu-Bin Zhang, Xing Feng, and Mei Li
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hypoxic-ischemic brain damage ,in vitro ,in vivo ,microglia ,nadph ,pyroptosis ,ros ,tigar ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Our previous studies have demonstrated that TP53-induced glycolysis and apoptosis regulator (TIGAR) can protect neurons after cerebral ischemia/reperfusion. However, the role of TIGAR in neonatal hypoxic-ischemic brain damage (HIBD) remains unknown. In the present study, 7-day-old Sprague-Dawley rat models of HIBD were established by permanent occlusion of the left common carotid artery followed by 2-hour hypoxia. At 6 days before induction of HIBD, a lentiviral vector containing short hairpin RNA of either TIGAR or gasdermin D (LV-sh_TIGAR or LV-sh_GSDMD) was injected into the left lateral ventricle and striatum. Highly aggressively proliferating immortalized (HAPI) microglial cell models of in vitro HIBD were established by 2-hour oxygen/glucose deprivation followed by 24-hour reoxygenation. Three days before in vitro HIBD induction, HAPI microglial cells were transfected with LV-sh_TIGAR or LV-sh_GSDMD. Our results showed that TIGAR expression was increased in the neonatal rat cortex after HIBD and in HAPI microglial cells after oxygen/glucose deprivation/reoxygenation. Lentivirus-mediated TIGAR knockdown in rats markedly worsened pyroptosis and brain damage after hypoxia/ischemia in vivo and in vitro. Application of exogenous nicotinamide adenine dinucleotide phosphate (NADPH) increased the NADPH level and the glutathione/oxidized glutathione ratio and decreased reactive oxygen species levels in HAPI microglial cells after oxygen/glucose deprivation/reoxygenation. Additionally, exogenous NADPH blocked the effects of TIGAR knockdown in neonatal HIBD in vivo and in vitro. These findings show that TIGAR can inhibit microglial pyroptosis and play a protective role in neonatal HIBD. The study was approved by the Animal Ethics Committee of Soochow University of China (approval No. 2017LW003) in 2017.
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- 2021
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8. The role of pineal microRNA-325 in regulating circadian rhythms after neonatal hypoxic-ischemic brain damage
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Ning Sha, Hua-Wei Wang, Bin Sun, Min Gong, Po Miao, Xiao-Lu Jiang, Xiao-Feng Yang, Mei Li, Li-Xiao Xu, Chen-Xi Feng, Yuan-Yuan Yang, Jie Zhang, Wen-Jing Zhu, Yuan-Yuan Gao, Xing Feng, and Xin Ding
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brain injury ,circadian rhythm ,hypoxic-ischemic brain damage ,mirna ,neonate ,pineal gland ,sleep ,transcription factor ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Circadian rhythm disorder is a common, but often neglected, consequence of neonatal hypoxic-ischemic brain damage (HIBD). However, the underlying molecular mechanisms remain largely unknown. We previously showed that, in a rat model of HIBD, up-regulation of microRNA-325 (miR-325) in the pineal gland is responsible for the suppression of Aanat, a key enzyme involved in melatonin synthesis and circadian rhythm regulation. To better understand the mechanism by which miR-325 affects circadian rhythms in neonates with HIBD, we compared clinical samples from neonates with HIBD and samples from healthy neonates recruited from the First Affiliated Hospital of Soochow University (Dushuhu Branch) in 2019. We found that circulating miR-325 levels correlated positively with the severity of sleep and circadian rhythm disorders in neonates with HIBD. Furthermore, a luciferase reporter gene assay revealed that LIM homeobox 3 (LHX3) is a novel downstream target of miR-325. In addition, in miR-325 knock-down mice, the transcription factor LHX3 exhibited an miR-325-dependent circadian pattern of expression in the pineal gland. We established a neonatal mouse model of HIBD by performing double-layer ligation of the left common carotid artery and exposing the pups to a low-oxygen environment for 2 hours. Lhx3 mRNA expression was significantly down-regulated in these mice and partially rescued in miR-325 knockout mice subjected to the same conditions. Finally, we showed that improvement in circadian rhythm-related behaviors in animals with HIBD was dependent on both miR-325 and LHX3. Taken together, our findings suggest that the miR-325-LHX3 axis is responsible for regulating circadian rhythms and provide novel insights into the identification of potential therapeutic targets for circadian rhythm disorders in patients with neonatal HIBD. The clinical trial was approved by Institutional Review Board of Children’s Hospital of Soochow University (approval No. 2015028) on July 20, 2015. Animal experiments were approved by Animal Care and Use Committee, School of Medicine, Soochow University, China (approval No. XD-2016-1) on January 15, 2016.
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- 2021
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9. The postoperative infections after endoscopic transsphenoidal surgery for growth hormone⁃secreting pituitary adenoma
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Jian⁃yu ZHU, Zhi⁃cheng WANG, Yi ZHANG, LI Xiao⁃xu, Jie LIU, Kan DENG, Ren⁃zhi WANG, and Yong YAO
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growth hormone ⁃secreting pituitary adenoma ,sphenoid sinus ,neuroendoscopes ,postoperative complications ,infection ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Objective To explore the characteristics, risk factors of postoperative infections for patients with growth hormone (GH)⁃secreting pituitary adenoma after endoscopic transsphenoidal surgery, and to share the experience of diagnosis and treatment of these patients. Methods A total of 122 patients with GH⁃secreting pituitary adenoma who underwent endoscopic transsphenoidal surgery were included from January 2016 to October 2019, and the data of postoperative body temperature, postoperative infection and related possible risk factors were analyzed. Results The incidence of postoperative infections in patients with acromegaly was significantly higher than that with other types of pituitary adenomas [9.84% (12/122) vs. 3.77% (8/212), P=0.025]. Central nervous system infection (7 cases) and bacteremia (4 cases) were the most common types of infections. Gram ⁃ negative bacilli were predominant (10 cases). The postoperative peak body temperature of patients with infections (12 cases) was significantly higher (P = 0.000) and appeared later than non ⁃infectious group (110 cases, P= 0.000). Multivariate Logistic analysis showed that intraoperative cerebrospinal fluid leakage (OR = 5.520, 95% CI:1.193-25.551; P = 0.029) and female (OR = 7.804, 95% CI: 1.088 - 55.948;P = 0.041) patients were major risk factors for postoperative infections. Conclusions For patients with GH ⁃ secreting pituitary adenoma who underwent endoscopic surgery, postoperative infections were uncommon but serious complication, especially for females, for those who experienced intraoperative cerebrospinal fluid leakage and postoperative peak body temperature delayed. Early identification and timely treatment are very important. Empirical anti ⁃ infective treatment should cover Gram ⁃ negative bacteria. Repair using autologous fat fascia and nasoseptal flap may reduce the incidence of postoperative infections in patients who suffered severe cerebrospinal fluid leakage. DOI:10.3969/j.issn.1672⁃6731.2020.03.013
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- 2020
10. Profiling Temporal Changes of the Pineal Transcriptomes at Single Cell Level Upon Neonatal HIBD
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Xin Ding, Tao Pan, Qiuyan Tian, Wenxi Huang, Lauren S Hayashi, Qin Liu, Fuyong Li, Li-Xiao Xu, Po Miao, Xiaofeng Yang, Bin Sun, Chen-Xi Feng, Xing Feng, Mei Li, and Jian Huang
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hypoxic-ischemic brain damage ,pineal gland ,single cell RNA sequencing ,pinealocyte ,astrocyte ,microglia ,Biology (General) ,QH301-705.5 - Abstract
Neonatal hypoxic-ischemic brain damage (HIBD) often results in various neurological deficits. Among them, a common, yet often neglected, symptom is circadian rhythm disorders. Previous studies revealed that the occurrence of cysts in the pineal gland, an organ known to regulate circadian rhythm, is associated with circadian problems in children with HIBD. However, the underlying mechanisms of pineal dependent dysfunctions post HIBD remain largely elusive. Here, by performing 10x single cell RNA sequencing, we firstly molecularly identified distinct pineal cell types and explored their transcriptome changes at single cell level at 24 and 72 h post neonatal HIBD. Bioinformatic analysis of cell prioritization showed that both subtypes of pinealocytes, the predominant component of the pineal gland, were mostly affected. We then went further to investigate how distinct pineal cell types responded to neonatal HIBD. Within pinealocytes, we revealed a molecularly defined β to α subtype conversion induced by neonatal HIBD. Within astrocytes, we discovered that all three subtypes responded to neonatal HIBD, with differential expression of reactive astrocytes markers. Two subtypes of microglia cells were both activated by HIBD, marked by up-regulation of Ccl3. Notably, microglia cells showed substantial reduction at 72 h post HIBD. Further investigation revealed that pyroptosis preferentially occurred in pineal microglia through NLRP3-Caspase-1-GSDMD signaling pathway. Taken together, our results delineated temporal changes of molecular and cellular events occurring in the pineal gland following neonatal HIBD. By revealing pyroptosis in the pineal gland, our study also provided potential therapeutic targets for preventing extravasation of pineal pathology and thus improving circadian rhythm dysfunction in neonates with HIBD.
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- 2022
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11. Selection of organosilicone surfactants for tank-mixed pesticides considering the balance between synergistic effects on pests and environmental risks
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Li, Bei-xing, Liu, Yang, Zhang, Peng, Li, Xiao-xu, Pang, Xiu-yu, Zhao, Yun-he, Li, Hua, Liu, Feng, Lin, Jin, and Mu, Wei
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- 2019
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12. Knocking down TRPM2 expression reduces cell injury and NLRP3 inflammasome activation in PC12 cells subjected to oxygen-glucose deprivation
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Tao Pan, Qiu-Jiao Zhu, Li-Xiao Xu, Xin Ding, Jian-Qin Li, Bin Sun, Jun Hua, and Xing Feng
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apoptosis ,calcium ,caspase-1 ,nlrp3 ,mitochondrial impairment ,oxidative stress ,oxygen-glucose deprivation ,pc12 ,shrna ,trpm2 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Transient receptor potential melastatin 2 (TRPM2) is an important ion channel that represents a potential target for treating injury caused by cerebral ischemia. However, it is unclear whether reducing TRPM2 expression can help repair cerebral injury, and if so what the mechanism underlying this process involves. This study investigated the protective effect of reducing TRPM2 expression on pheochromocytoma (PC12) cells injured by oxygen-glucose deprivation (OGD). PC12 cells were transfected with plasmid encoding TRPM2 shRNAS, then subjected to OGD by incubation in glucose-free medium under hypoxic conditions for 8 hours, after which the cells were allowed to reoxygenate for 24 hours. Apoptotic cells, mitochondrial membrane potentials, reactive oxygen species levels, and cellular calcium levels were detected using flow cytometry. The relative expression of C-X-C motif chemokine ligand 2 (CXCL2), NACHT, LRR, and PYD domain–containing protein 3 (NALP3), and caspase-1 were detected using fluorescence-based quantitative reverse transcription-polymerase chain reaction and western blotting. The rates of apoptosis, mitochondrial membrane potentials, reactive oxygen species levels, and cellular calcium levels in the TRPM2-shRNA + OGD group were lower than those observed in the OGD group. Taken together, these results suggest that TRPM2 knockdown reduces OGD-induced neuronal injury, potentially by inhibiting apoptosis and reducing oxidative stress levels, mitochondrial membrane potentials, intracellular calcium concentrations, and NLRP3 inflammasome activation.
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- 2020
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13. Untangling the roles of microclimate, behaviour and physiological polymorphism in governing vulnerability of intertidal snails to heat stress
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Dong, Yun-wei, Li, Xiao-xu, Choi, Francis M. P., Williams, Gray A., Somero, George N., and Helmuth, Brian
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- 2017
14. Melatonin alleviates brain and peripheral tissue edema in a neonatal rat model of hypoxic-ischemic brain damage: the involvement of edema related proteins
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Li-Xiao Xu, Yuan Lv, Yan-Hong Li, Xin Ding, Ying Wang, Xing Han, Ming-Hua Liu, Bin Sun, and Xing Feng
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Melatonin ,Hypoxic-ischemic encephalopathy ,Edema ,Aquaporin-4 ,Zonula occludens-1 ,Occludin ,Pediatrics ,RJ1-570 - Abstract
Abstract Background Previous studies have indicated edema may be involved in the pathophysiology following hypoxic-ischemic encephalopathy (HIE), and melatonin may exhibit neuro-protection against brain insults. However, little is known regarding the mechanisms that involve the protective effects of melatonin in the brain and peripheral tissues after HIE. The present study aimed to examine the effects of melatonin on multiple organs, and the expression of edema related proteins in a neonatal rat model of hypoxic-ischemic brain damage (HIBD). Methods One hundred ninety-two neonatal rats were randomly divided into three subgroups that underwent a sham surgery or HIBD. After the HIBD or sham-injury, the rats received an intraperitoneal injection of melatonin or an equal volume vehicle, respectively. We investigated the effects of melatonin on brain, kidney, and colon edema via histological examination and the expression of edema related proteins, including AQP-4, ZO-1 and occludin, via qPCR and western blot. Results Our data indicated (1) Melatonin reduced the histological injury in the brain and peripheral organs induced by HIBD as assessed via H-E staining and transmission electron microscopy. (2) Melatonin alleviated the HIBD-induced cerebral edema characterized by increased brain water content. (3) HIBD induced significant changes of edema related proteins, such as AQP-4, ZO-1 and occludin, and these changes were partially reversed by melatonin treatment. Conclusions These findings provide substantial evidence that melatonin treatment has protective effects on the brain and peripheral organs after HIBD, and the edema related proteins, AQP4, ZO-1, and occludin, may indirectly contribute tothe mechanism of the edema protection by melatonin.
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- 2017
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15. Neuroprotective effects of autophagy inhibition on hippocampal glutamate receptor subunits after hypoxia-ischemia-induced brain damage in newborn rats
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Li-xiao Xu, Xiao-juan Tang, Yuan-yuan Yang, Mei Li, Mei-fang Jin, Po Miao, Xin Ding, Ying Wang, Yan-hong Li, Bin Sun, and Xing Feng
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nerve regeneration ,hypoxic-ischemic brain damage ,hypoxia ,ischemia ,α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid-type glutamate receptor subunit ,GluR ,hippocampus ,rapamycin ,3-methyladenine ,neural regeneration ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Autophagy has been suggested to participate in the pathology of hypoxic-ischemic brain damage (HIBD). However, its regulatory role in HIBD remains unclear and was thus examined here using a rat model. To induce HIBD, the left common carotid artery was ligated in neonatal rats, and the rats were subjected to hypoxia for 2 hours. Some of these rats were intraperitoneally pretreated with the autophagy inhibitor 3-methyladenine (10 mM in 10 μL) or the autophagy stimulator rapamycin (1 g/kg) 1 hour before artery ligation. Our findings demonstrated that hypoxia-ischemia-induced hippocampal injury in neonatal rats was accompanied by increased expression levels of the autophagy-related proteins light chain 3 and Beclin-1 as well as of the AMPA receptor subunit GluR1, but by reduced expression of GluR2. Pretreatment with the autophagy inhibitor 3-methyladenine blocked hypoxia-ischemia-induced hippocampal injury, whereas pretreatment with the autophagy stimulator rapamycin significantly augmented hippocampal injury. Additionally, 3-methyladenine pretreatment blocked the hypoxia-ischemia-induced upregulation of GluR1 and downregulation of GluR2 in the hippocampus. By contrast, rapamycin further elevated hippocampal GluR1 levels and exacerbated decreased GluR2 expression levels in neonates with HIBD. Our results indicate that autophagy inhibition favors the prevention of HIBD in neonatal rats, at least in part, through normalizing GluR1 and GluR2 expression.
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- 2017
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16. Pear leaf disease segmentation method based on improved DeepLabv3+.
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Fu, Jun, Li, Xiao-xu, Chen, Fang-hua, and Wu, Gang
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- 2024
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17. The role of pineal microRNA-325 in regulating circadian rhythms after neonatal hypoxic-ischemic brain damage
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Xing Feng, Bin Sun, Xiaofeng Yang, Gong Min, Chen-Xi Feng, Xiao-Lu Jiang, Ning Sha, Jie Zhang, Yuan-Yuan Gao, Wen-Jing Zhu, Yuan-Yuan Yang, Hua-Wei Wang, Mei Li, Po Miao, Li-Xiao Xu, and Xin Ding
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circadian rhythm ,AANAT ,pineal gland ,Physiology ,Brain damage ,lcsh:RC346-429 ,Pineal gland ,Developmental Neuroscience ,microRNA ,medicine ,Circadian rhythm ,sleep ,Transcription factor ,lcsh:Neurology. Diseases of the nervous system ,transcription factor ,miRNA ,business.industry ,brain injury ,medicine.anatomical_structure ,hypoxic-ischemic brain damage ,Knockout mouse ,mirna ,neonate ,medicine.symptom ,LHX3 ,business ,Research Article - Abstract
Circadian rhythm disorder is a common, but often neglected, consequence of neonatal hypoxic-ischemic brain damage (HIBD). However, the underlying molecular mechanisms remain largely unknown. We previously showed that, in a rat model of HIBD, up-regulation of microRNA-325 (miR-325) in the pineal gland is responsible for the suppression of Aanat, a key enzyme involved in melatonin synthesis and circadian rhythm regulation. To better understand the mechanism by which miR-325 affects circadian rhythms in neonates with HIBD, we compared clinical samples from neonates with HIBD and samples from healthy neonates recruited from the First Affiliated Hospital of Soochow University (Dushuhu Branch) in 2019. We found that circulating miR-325 levels correlated positively with the severity of sleep and circadian rhythm disorders in neonates with HIBD. Furthermore, a luciferase reporter gene assay revealed that LIM homeobox 3 (LHX3) is a novel downstream target of miR-325. In addition, in miR-325 knock-down mice, the transcription factor LHX3 exhibited an miR-325-dependent circadian pattern of expression in the pineal gland. We established a neonatal mouse model of HIBD by performing double-layer ligation of the left common carotid artery and exposing the pups to a low-oxygen environment for 2 hours. Lhx3 mRNA expression was significantly down-regulated in these mice and partially rescued in miR-325 knockout mice subjected to the same conditions. Finally, we showed that improvement in circadian rhythm-related behaviors in animals with HIBD was dependent on both miR-325 and LHX3. Taken together, our findings suggest that the miR-325-LHX3 axis is responsible for regulating circadian rhythms and provide novel insights into the identification of potential therapeutic targets for circadian rhythm disorders in patients with neonatal HIBD. The clinical trial was approved by Institutional Review Board of Children's Hospital of Soochow University (approval No. 2015028) on July 20, 2015. Animal experiments were approved by Animal Care and Use Committee, School of Medicine, Soochow University, China (approval No. XD-2016-1) on January 15, 2016.
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- 2021
18. Global stability of an age-structured model of smoking and its treatment
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Tan, Yuan-Shun, Li, Xiao-Xu, Yang, Jing, and Cheke, Robert
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QA75 ,RA0421 ,Applied Mathematics ,Modeling and Simulation - Abstract
Smoking is a serious global public health problem. Its serious consequences arose from smoking and the ability to quit it are closely related to age. Personal determination and education level usually play important roles in quitting smoking. In order to capture such characteristics, we developed a novel age-structured smoking dynamical model. By defining the smoking generation number R0, the local stability, global stability of the boundary equilibrium and endemic equilibrium are obtained using Lyapunov functions. The uniform persistence, as well as the well-posedness and asymptotic smoothness of the solutions are also studied. Sensitivity analyses show that the lower the age of onset of smoking and the higher the determination to stop, the greater the likelihood of quitting smoking and numerical studies support the theoretical results.
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- 2022
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19. The dual role of BI 2536, a small-molecule inhibitor that targets PLK1, in induction of apoptosis and attenuation of autophagy in neuroblastoma cells
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Jian Pan, Xiaolu Li, Xiao-Juan Du, Yi Xie, Shaoyan Hu, Haitao Lv, Yan-Fang Tao, Jun Lu, Junli Ren, Guanghui Qian, Zhi-Heng Li, Chun Yang, Mei Li, Fang Fang, Li-Xiao Xu, Yi Wu, and Xu Cao
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0301 basic medicine ,Programmed cell death ,autophagy ,Cell cycle checkpoint ,Chemistry ,Autophagy ,apoptosis ,medicine.disease ,PLK1 ,BI 2536 ,03 medical and health sciences ,neuroblastoma ,030104 developmental biology ,0302 clinical medicine ,Oncology ,Apoptosis ,Cell culture ,030220 oncology & carcinogenesis ,Neuroblastoma ,Cancer research ,medicine ,Mitosis ,polo-like kinase 1 (PLK1) ,Research Paper - Abstract
Neuroblastoma (NB) is the most common extra-cranial solid tumor in childhood with the overall 5 years' survival less than 40%. Polo-like kinase 1 (PLK1) is a serine/threonine-protein kinase expressed during mitosis and over expressed in multiple cancers, including neuroblastoma. We found that higher PLK1 expression related to poor outcome of NB patients. BI2536, a small molecule inhibitor against PLK1, significantly reduced cell viability in a panel of NB cell lines, with IC50 less than 100 nM. PLK1 inhibition by BI 2536 treatment induced cell cycle arrest at G2/M phase and cell apoptosis in NB cells. Realtime PCR array revealed the PLK1 inhibition related genes, such as BIRC7, TNFSF10, LGALS1 and DAD1 et al. Moreover, autophagy activity was investigated in the NB cells treated with BI 2536. BI 2536 treatment in NB cells increased LC3-II puncta formation and LC3-II expression. Formation of autophagosome induced by BI 2536 was observed by transmission electron microscopy. However, BI2536 abrogated the autophagic flux in NB cells by reducing SQSTM1/p62 expression and AMPKαT172 phosphorylation. These results provide new clues for the molecular mechanism of cell death induced by BI 2536 and suggest that BI 2536 may act as new candidate drug for neuroblastoma.
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- 2020
20. Microhabitat temperature variation combines with physiological variation to enhance thermal resilience of the intertidal mussel Mytilisepta virgata
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Li, Xiao‐xu, primary, Tan, Yue, additional, Sun, Yong‐xu, additional, Wang, Jie, additional, and Dong, Yun‐wei, additional
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- 2021
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21. Preliminary analysis of the expression of ZBTB1 in human pancreatic carcinoma
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Cheng, Ming‐yang, primary, Zeng, Yan, additional, Sun, Yu, additional, Shi, Chun‐wei, additional, Wang, Jun‐hong, additional, Li, Feng‐di, additional, Lu, Yi‐yuan, additional, Wang, Jing‐Ying, additional, Wang, Ru‐Yu, additional, Li, Xin‐yang, additional, Li, Xiao‐xu, additional, Fan, Shu‐hui, additional, Yang, Gui‐lian, additional, Cao, Xin, additional, Xu, Bin, additional, and Wang, Chun‐feng, additional
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- 2021
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22. TP53-induced glycolysis and apoptosis regulator alleviates hypoxia/ischemia-induced microglial pyroptosis and ischemic brain damage
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Li-Xiao Xu, Zhang Zubin, Xing Feng, Xin Ding, Lan-Lan Tan, Chen-Xi Feng, Xiao-Lu Jiang, Mei Li, Bin Sun, Zheng-Hong Qin, and Gen Li
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0301 basic medicine ,Ischemia ,microglia ,Brain damage ,TIGAR ,Pharmacology ,lcsh:RC346-429 ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Developmental Neuroscience ,medicine ,NADPH ,lcsh:Neurology. Diseases of the nervous system ,chemistry.chemical_classification ,Reactive oxygen species ,Microglia ,pyroptosis ,Pyroptosis ,hypoxic-ischemic brain damage ,in vitro ,in vivo ,nadph ,ros ,tigar ,ROS ,Glutathione ,Hypoxia (medical) ,medicine.disease ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,medicine.symptom ,030217 neurology & neurosurgery ,Nicotinamide adenine dinucleotide phosphate ,Research Article - Abstract
Our previous studies have demonstrated that TP53-induced glycolysis and apoptosis regulator (TIGAR) can protect neurons after cerebral ischemia/reperfusion. However, the role of TIGAR in neonatal hypoxic-ischemic brain damage (HIBD) remains unknown. In the present study, 7-day-old Sprague-Dawley rat models of HIBD were established by permanent occlusion of the left common carotid artery followed by 2-hour hypoxia. At 6 days before induction of HIBD, a lentiviral vector containing short hairpin RNA of either TIGAR or gasdermin D (LV-sh_TIGAR or LV-sh_GSDMD) was injected into the left lateral ventricle and striatum. Highly aggressively proliferating immortalized (HAPI) microglial cell models of in vitro HIBD were established by 2-hour oxygen/glucose deprivation followed by 24-hour reoxygenation. Three days before in vitro HIBD induction, HAPI microglial cells were transfected with LV-sh_TIGAR or LV-sh_GSDMD. Our results showed that TIGAR expression was increased in the neonatal rat cortex after HIBD and in HAPI microglial cells after oxygen/glucose deprivation/reoxygenation. Lentivirus-mediated TIGAR knockdown in rats markedly worsened pyroptosis and brain damage after hypoxia/ischemia in vivo and in vitro. Application of exogenous nicotinamide adenine dinucleotide phosphate (NADPH) increased the NADPH level and the glutathione/oxidized glutathione ratio and decreased reactive oxygen species levels in HAPI microglial cells after oxygen/glucose deprivation/reoxygenation. Additionally, exogenous NADPH blocked the effects of TIGAR knockdown in neonatal HIBD in vivo and in vitro. These findings show that TIGAR can inhibit microglial pyroptosis and play a protective role in neonatal HIBD. The study was approved by the Animal Ethics Committee of Soochow University of China (approval No. 2017LW003) in 2017.
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- 2020
23. [Role of microglial pyroptosis in hypoxic-ischemic brain damage]
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Lan-Lan, Tan, Mei, Li, Chen-Xi, Feng, Li-Xiao, Xu, Xin, Ding, Bin, Sun, Gen, Li, and Xing, Feng
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Intracellular Signaling Peptides and Proteins ,Pyroptosis ,Animals ,Brain ,论著·实验研究 ,Microglia ,Rats - Abstract
OBJECTIVE: To investigate the role of microglial pyroptosis in hypoxic-ischemic brain damage. METHODS: An oxygen-glucose deprivation/reoxygenation (OGD/R) model of rat microglial cells were cultured in vitro. Western blot was used to measure the expression of the pyroptosis-related proteins caspase-1, interleukin-1β (IL-1β), and N-terminal gasdermin D (GSDMD-N) at 0, 1, 3, 6, 12, and 24 hours after OGD/R. After the microglial cells were transfected with lentivirus-mediated silenced gasdermin D (GSDMD), immunofluorescence assay and Western blot were used to measure the transfection rate of GSDMD. Microglial cell lines were divided into three groups:normal control, negative control, and LV-sh_GSDMD (lentivirus-mediated GSDMD silencing). CCK-8 assay and LDH kit were used to observe the effect of GSDMD silencing on the viability and toxicity of microglial cells at 24 hours after OGD/R. Western blot was used to observe the effect of GSDMD silencing on the levels of caspase-1, GSDMD-N, and IL-1β in the microglial cells at 24 hours after OGD/R. RESULTS: The expression levels of the pyroptosis-related proteins caspase-1, GSDMD-N, and IL-1β in microglial cells were upregulated since 0 hour after OGD/R and reached the peak levels at 24 hours. A microglial cell model of lentivirus-mediated GSDMD silencing was successfully constructed. At 24 hours after OGD/R, compared with the normal control group, the GSDMD silencing group had a significant increase in the cell viability and a significant reduction in the cytotoxicity (P < 0.05), as well as significant reductions in the protein expression levels of caspase-1, GSDMD-N, and IL-1β in microglial cells (P < 0.05). CONCLUSIONS: Lentivirus silencing of the key substrate protein for pyroptosis GSDMD can alleviate hypoxic-ischemic brain damage, suggesting that microglial pyroptosis aggravates hypoxic-ischemic brain damage.
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- 2020
24. Significance of sTREM-1 in early prediction of ventilator-associated pneumonia in neonates: a single-center, prospective, observational study
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Gen Li, Xing Feng, Tao Pan, Tian Yu, Chen-Xi Feng, Li-Xiao Xu, Bin Sun, Ying Wang, Zuming Yang, and Xingxing Zhao
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Youden's J statistic ,Pilot Projects ,030204 cardiovascular system & hematology ,Sensitivity and Specificity ,Gastroenterology ,Procalcitonin ,lcsh:Infectious and parasitic diseases ,03 medical and health sciences ,Neonate ,Mechanical ventilation ,0302 clinical medicine ,Predictive Value of Tests ,Internal medicine ,medicine ,Humans ,Ventilator-associated pneumonia ,lcsh:RC109-216 ,Prospective Studies ,030212 general & internal medicine ,Receiver operating characteristic ,Interleukin-6 ,business.industry ,Soluble myeloid cell trigger receptor-1 ,Infant, Newborn ,Area under the curve ,Pneumonia, Ventilator-Associated ,Biomarker ,bacterial infections and mycoses ,medicine.disease ,Respiration, Artificial ,Triggering Receptor Expressed on Myeloid Cells-1 ,Confidence interval ,respiratory tract diseases ,C-Reactive Protein ,Infectious Diseases ,ROC Curve ,Biomarker (medicine) ,Female ,business ,Biomarkers ,Research Article - Abstract
Background To evaluate whether soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) can be used as an early predictor of ventilator-associated pneumonia (VAP). Methods Ventilated neonatal patients admitted into the neonatology department between January 2017 and January 2018 were divided into VAP (n = 30) and non-VAP (n = 30) groups. Serum sTREM, procalcitonin (PCT), C-reactive protein and interleukin-6 levels were measured at 0, 24, 72, and 120 h after initiation of mechanical ventilation (MV). Correlations between blood biomarker concentrations and VAP occurrence were analyzed. Predictive factors for VAP were identified by logistic regression analysis and Hosmer-Lemeshow test, and the predictive value of sTREM-1 and biomarker combinations for VAP was determined by receiver operating characteristic curve analysis. Results The serum sTREM-1 concentration was significantly higher in the VAP group than in the non-VAP group after 72 and 120 h of MV (72 h: 289.5 (179.6–427.0) vs 202.9 (154.8–279.6) pg/ml, P P = 0.042). The area under the curve (AUC) for sTREM-1 at 72 h was 0.902 with a sensitivity of 90% and specificity of 77% for the optimal cut-off value of 165.05 pg/ml. Addition of PCT to sTERM-1 at 72 h further improved the predictive value, with this combination having an AUC of 0.971 (95% confidence interval: 0.938–1.000), sensitivity of 0.96, specificity of 0.88, and Youden index of 0.84. Conclusion sTREM-1 is a reliable predictor of VAP in neonates, and combined measurement of serum levels of sTREM-1 and PCT after 72 h of MV provided the most accurate prediction of VAP in neonatal patients.
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- 2020
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25. Identification of novel biomarkers for neonatal hypoxic-ischemic encephalopathy using iTRAQ
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Po Miao, Hong Li, Xing Feng, Yajing Yun, Xin Ding, Yuanyuan Zhu, Li-Xiao Xu, Mei-Fang Jin, Gen Li, and Bin Sun
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Male ,Proteomics ,0301 basic medicine ,Neonatal intensive care unit ,Encephalopathy ,Bioinformatics ,Severity of Illness Index ,Hypoxic Ischemic Encephalopathy ,S100A8 ,03 medical and health sciences ,Neonate ,0302 clinical medicine ,Hypoxic-ischemic encephalopathy ,Humans ,Medicine ,Calgranulin A ,Haptoglobins ,biology ,business.industry ,Research ,Haptoglobin ,Infant, Newborn ,lcsh:RJ1-570 ,lcsh:Pediatrics ,medicine.disease ,Neonatal Hypoxic Ischemic Encephalopathy ,Blot ,030104 developmental biology ,Case-Control Studies ,Potential biomarkers ,Hypoxia-Ischemia, Brain ,biology.protein ,Female ,Isobaric tags for absolute and relative quantification ,business ,Biomarkers ,030217 neurology & neurosurgery - Abstract
Background A prompt diagnosis of HIE remains a challenge clinically. This study aimed to identify potential biomarkers of neonatal hypoxic-ischemic encephalopathy (HIE) via a novel proteomic approach, the isobaric tags for absolute and relative quantification (iTRAQ) method. Methods Blood samples were collected from neonates with mild (n = 4), moderate (n = 4), or severe (n = 4) HIE who were admitted to the neonatal intensive care unit of Children’s Hospital of Soochow University between Oct 2015 and Oct 2017. iTRAQ was performed in HIE patients and healthy controls (n = 4). Bioinformatics analyses including Gene Ontology and KEGG pathway enrichment analysis were performed to evaluate the potential features and capabilities of the identified differentially expressed proteins. Results A total of 51 commonly differentially expressed proteins were identified among the comparisons between mild, moderate, and severe HIE as well as healthy controls. Haptoglobin (HP) and S100A8 were most significantly up-regulated in patients with HIE and further validated via real-time PCR and western blotting. The differentially expressed proteins represented multiple biological processes, cellular components and molecular functions and were markedly enriched in complement and coagulation cascades. Conclusions HP and S100A8 may serve as a potential biomarker for neonatal HIE and reflects the severity of HIE. The complement and coagulation cascades play crucial roles in the development of neonatal HIE.
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- 2020
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26. Temperature adaptations of the thermophilic snail Echinolittorina malaccana: insights from metabolomic analysis
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Chen, Ya-qi, primary, Wang, Jie, additional, Liao, Ming-ling, additional, Li, Xiao-xu, additional, and Dong, Yun-wei, additional
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- 2021
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27. Inhibition of neuroblastoma proliferation by PF-3758309, a small-molecule inhibitor that targets p21-activated kinase 4
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Xiaolu Li, Li-Xiao Xu, Xiaolan Chen, Wei-Wei Du, Guang-Hui Qian, Chun Yang, Yi Wu, Jian Wang, Shaoyan Hu, He Zhao, Jian Pan, Fang Fang, Jun Lu, Xin Ding, Junli Ren, Zhi-Heng Li, Mei Li, Yunyun Xu, and Yan-Fang Tao
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Adult ,Male ,0301 basic medicine ,Cancer Research ,Cell cycle checkpoint ,Cell Survival ,MAP Kinase Signaling System ,Cell ,Biology ,neuroblastoma ,03 medical and health sciences ,Cell Line, Tumor ,Neuroblastoma ,medicine ,Humans ,Pyrroles ,Protein Kinase Inhibitors ,Cell Proliferation ,Neoplasm Staging ,Oncogene ,Kinase ,Cell Cycle ,apoptosis ,Articles ,General Medicine ,Cell cycle ,medicine.disease ,Up-Regulation ,Cell biology ,Gene Expression Regulation, Neoplastic ,PF-3758309 ,growth arrest ,030104 developmental biology ,medicine.anatomical_structure ,p21-Activated Kinases ,Oncology ,PAK4 ,Apoptosis ,Cancer cell ,Cancer research ,Pyrazoles ,Female - Abstract
Neuroblastoma is the most common extracranial solid childhood tumor. Despite the availability of advanced multimodal therapy, high-risk patients still have low survival rates. p21-activated kinase 4 (PAK4) has been shown to regulate many cellular processes in cancer cells, including migration, polarization and proliferation. However, the role of PAK4 in neuroblastoma remains unclear. In the present study, we demonstrated that PAK4 was overexpressed in neuroblastoma tissues and was correlated with tumor malignance and prognosis. To investigate the function of PAK4 in neuroblastoma, we used a small-molecule inhibitor that targets PAK4, that is, PF-3758309. Our results showed that PF-3758309 significantly induced cell cycle arrest at the G1 phase and apoptosis in neuroblastoma cell lines. Meanwhile, the inhibition of PAK4 by PF-3758309 increased the expression of CDKN1A, BAD and BAK1 and decreased the expression of Bcl-2 and Bax. In addition, we screened the target genes of PAK4 by PCR array and found that 23 genes were upregulated (including TP53I3, TBX3, EEF1A2, CDKN1A, IFNB1 and MAPK8IP2) and 20 genes were downregulated (including TNFSF8, Bcl2-A1, Bcl2L1, SOCS3, BIRC3 and NFKB1) after PAK4 inhibition by PF-3758309. Moreover, PAK4 was found to regulate the cell cycle and apoptosis via the ERK signaling pathway. In conclusion, the present study demonstrated, for the first time, the expression and function of PAK4 in neuroblastomas and the inhibitory effect of PF-3758309, which deserves further investigation as an alternative strategy for neuroblastoma treatment.
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- 2017
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28. Inhibiting PLK1 induces autophagy of acute myeloid leukemia cells via mammalian target of rapamycin pathway dephosphorylation
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Yanhong Li, Guang-Hui Qian, Jian Wang, Shaoyan Hu, Xing Feng, Wei-Qi He, Li-Xiao Xu, Xie Yi, Jian Pan, Mei Li, Yan-Fang Tao, Zhi-Heng Li, Xiaolu Li, Wei-Wei Du, Yi-Ping Li, Gang Li, Fang Fang, Jun Lu, Junli Ren, and Yi Wu
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Male ,0301 basic medicine ,Cancer Research ,Cell Cycle Proteins ,Mice ,0302 clinical medicine ,hemic and lymphatic diseases ,Tumor Cells, Cultured ,Phosphorylation ,RNA, Small Interfering ,Child ,Reverse Transcriptase Polymerase Chain Reaction ,TOR Serine-Threonine Kinases ,RO3280 ,Myeloid leukemia ,Articles ,General Medicine ,Cell cycle ,Prognosis ,Cell biology ,Survival Rate ,Leukemia, Myeloid, Acute ,mTOR phosphorylation ,Oncology ,030220 oncology & carcinogenesis ,polo-like kinase 1 ,Female ,Signal Transduction ,autophagy ,Programmed cell death ,Blotting, Western ,Protein Serine-Threonine Kinases ,Biology ,Real-Time Polymerase Chain Reaction ,03 medical and health sciences ,Proto-Oncogene Proteins ,Biomarkers, Tumor ,Animals ,Humans ,RNA, Messenger ,Protein kinase A ,PI3K/AKT/mTOR pathway ,Cell Proliferation ,Neoplasm Staging ,BI2536 ,Autophagy ,pediatric acute myeloid leukemia ,Xenograft Model Antitumor Assays ,030104 developmental biology ,Cancer research ,K562 cells - Abstract
Decreased autophagy is accompanied by the development of a myeloproliferative state or acute myeloid leukemia (AML). AML cells are often sensitive to autophagy‑inducing stimuli, prompting the idea that targeting autophagy can be useful in AML cytotoxic therapy. AML NB4 cells overexpressing microtubule-associated protein 1 light chain 3-green fluorescent protein were screened with 69 inhibitors to analyze autophagy activity. AML cells were treated with the polo-like kinase 1 (PLK1) inhibitors RO3280 and BI2536 before autophagy analysis. Cleaved LC3 (LC3-II) and the phosphorylation of mammalian target of rapamycin (mTOR), adenosine monophosphate-activated protein kinase, and Unc-51-like kinase 1 during autophagy was detected with western blotting. Autophagosomes were detected using transmission electron microscopy. Several inhibitors had promising autophagy inducer effects: BI2536, MLN0905, SK1-I, SBE13 HCL and RO3280. Moreover, these inhibitors all targeted PLK1. Autophagy activity was increased in the NB4 cells treated with RO3280 and BI2536. Inhibition of PLK1 expression in NB4, K562 and HL-60 leukemia cells with RNA interference increased LC3-II and autophagy activity. The phosphorylation of mTOR was reduced significantly in NB4 cells treated with RO3280 and BI2536, and was also reduced significantly when PLK1 expression was downregulated in the NB4, K562 and HL-60 cells. We demonstrate that PLK1 inhibition induces AML cell autophagy and that it results in mTOR dephosphorylation. These results may provide new insights into the molecular mechanism of PLK1 in regulating autophagy.
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- 2017
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29. Neuroprotective effects of autophagy inhibition on hippocampal glutamate receptor subunits after hypoxia-ischemia-induced brain damage in newborn rats
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Xing Feng, Li-Xiao Xu, Mei-Fang Jin, Yuan-Yuan Yang, Yanhong Li, Po Miao, Xiao-Juan Tang, Mei Li, Xin Ding, Bin Sun, and Ying Wang
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0301 basic medicine ,hippocampus ,α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid-type glutamate receptor subunit ,AMPA receptor ,Brain damage ,ischemia ,Hippocampal formation ,Biology ,Pharmacology ,Neuroprotection ,lcsh:RC346-429 ,03 medical and health sciences ,0302 clinical medicine ,Developmental Neuroscience ,Downregulation and upregulation ,medicine ,nerve regeneration ,lcsh:Neurology. Diseases of the nervous system ,hypoxic-ischemic brain damage ,hypoxia ,GluR ,rapamycin ,3-methyladenine ,neural regeneration ,Autophagy ,Glutamate receptor ,Hypoxia (medical) ,030104 developmental biology ,Biochemistry ,nervous system ,medicine.symptom ,030217 neurology & neurosurgery ,Research Article - Abstract
Autophagy has been suggested to participate in the pathology of hypoxic-ischemic brain damage (HIBD). However, its regulatory role in HIBD remains unclear and was thus examined here using a rat model. To induce HIBD, the left common carotid artery was ligated in neonatal rats, and the rats were subjected to hypoxia for 2 hours. Some of these rats were intraperitoneally pretreated with the autophagy inhibitor 3-methyladenine (10 mM in 10 μL) or the autophagy stimulator rapamycin (1 g/kg) 1 hour before artery ligation. Our findings demonstrated that hypoxia-ischemia-induced hippocampal injury in neonatal rats was accompanied by increased expression levels of the autophagy-related proteins light chain 3 and Beclin-1 as well as of the AMPA receptor subunit GluR1, but by reduced expression of GluR2. Pretreatment with the autophagy inhibitor 3-methyladenine blocked hypoxia-ischemia-induced hippocampal injury, whereas pretreatment with the autophagy stimulator rapamycin significantly augmented hippocampal injury. Additionally, 3-methyladenine pretreatment blocked the hypoxia-ischemia-induced upregulation of GluR1 and downregulation of GluR2 in the hippocampus. By contrast, rapamycin further elevated hippocampal GluR1 levels and exacerbated decreased GluR2 expression levels in neonates with HIBD. Our results indicate that autophagy inhibition favors the prevention of HIBD in neonatal rats, at least in part, through normalizing GluR1 and GluR2 expression.
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- 2017
30. Cloning and functional identification of gene OsATS in rice.
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LI Xiao-Xu, WANG Rui, ZHANG Li-Xia, SONG Ya-Meng, TIAN Xiao-Nan, and GE Rong-Chao
- Abstract
The plant embryo specific protein ATS3 is closely related to osmotic stress response in plants. Here, the stress resistance related gene OsATS was preliminarily studied in rice. Fluorescence quantitative PCR showed that the relative expression level of OsATS increased significantly after salt stress in rice. The overexpression vector of OsATS was constructed and transformed into Arabidopsis thaliana. The stress resistance test revealed that the overexpression of OsATS gene could significantly improve the salt tolerance of Arabidopsis thaliana at germination and adult stages. After that, the overexpression vector p1300-35s:OSATS and RNA interference vector pTCK303-OsATS-RNAi were transferred into rice. The stress tolerance analysis indicated that the salt tolerance of OsATS overexpression rice lines significantly increased at germination stage and seedling stage, while the salt tolerance of OsATS RNAi rice lines significantly decreased. Results of qRT-PCR and physiological index detection demonstrated that the relative expression levels of OSATS gene might regulate the protein content of proline and LEA cells by regulating the expression of OsP5CS1, OsLEA3-1 and OsPDH, thus affecting the salt tolerance in rice. This study preliminarily revealed the stress resistance function of OSATS gene, which laid a foundation for improving rice stress resistance by adjusting the relative expression level of OSATS gene. [ABSTRACT FROM AUTHOR]
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- 2021
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31. Front Cover
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Wang, Wei, primary, Wang, Jie, additional, Choi, Francis M. P., additional, Ding, Ping, additional, Li, Xiao‐xu, additional, Han, Guo‐dong, additional, Ding, Meng‐wen, additional, Guo, Minquan, additional, Huang, Xiong‐wei, additional, Duan, Wei‐xiang, additional, Cheng, Zhi‐yuan, additional, Chen, Zhi‐yuan, additional, Hawkins, Stephen J., additional, Jiang, Yuwu, additional, Helmuth, Brian, additional, and Dong, Yun‐wei, additional
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- 2020
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32. Global warming and artificial shorelines reshape seashore biogeography
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Wang, Wei, primary, Wang, Jie, additional, Choi, Francis M. P., additional, Ding, Ping, additional, Li, Xiao‐xu, additional, Han, Guo‐dong, additional, Ding, Meng‐wen, additional, Guo, Minquan, additional, Huang, Xiong‐wei, additional, Duan, Wei‐xiang, additional, Cheng, Zhi‐yuan, additional, Chen, Zhi‐yuan, additional, Hawkins, Stephen J., additional, Jiang, Yuwu, additional, Helmuth, Brian, additional, and Dong, Yun‐wei, additional
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- 2019
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33. A meta-analysis of dietary carbohydrate intake and inflammatory bowel disease risk: evidence from 15 epidemiology studies
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Qing Bin Wu, Ting Ting Zhou, Xiao Qing Zhang, Hai Xia Ge, Zhong Qin Jin, Li Xiao Xu, and Hui Gang Lu
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Risk ,medicine.medical_specialty ,Cross-sectional study ,Inflammatory bowel disease ,03 medical and health sciences ,0302 clinical medicine ,Crohn Disease ,Internal medicine ,Epidemiology ,Confidence Intervals ,Dietary Carbohydrates ,Odds Ratio ,medicine ,Humans ,030212 general & internal medicine ,business.industry ,Gastroenterology ,Case-control study ,General Medicine ,Odds ratio ,Inflammatory Bowel Diseases ,medicine.disease ,Ulcerative colitis ,Cross-Sectional Studies ,Case-Control Studies ,Meta-analysis ,Cohort ,Colitis, Ulcerative ,030211 gastroenterology & hepatology ,business - Abstract
Background and purpose: epidemiological studies that assess the association of dietary total carbohydrate intake and inflammatory bowel disease risk (IBD) have yielded controversial results. Therefore, this study of various epidemiological studies was conducted in order to explore this relationship. Methods: a systematic literature search of the PubMed, Embase, Web of Science and Medline databases was performed up to September 2017. Cohort, case-control or cross-sectional design studies were included that reported the association of dietary carbohydrate intake and IBD risk. Summary odds ratio (OR) and the corresponding 95% CI were calculated using the random effects model. Results: a total of eight articles with 15 individual studies that included 1,361 cases were eligible according to the inclusion criteria. Dietary carbohydrate intake had a non-significant relationship with the risk of IBD (OR = 1.091, 95% CI = 0.817-1.455, I2 = 31.6%, pfor heterogeneity = 0.116). The pooled OR and 95% CI for ulcerative colitis (UC) and Crohn’s disease (CD) with regard to dietary carbohydrate intake was 1.167 (0.777-1.752) and 1.010 (0.630-1.618), respectively. These associations were also non-significant in both European and Asia populations. Conclusions: a higher dietary total carbohydrate intake had a non-significant relationship with IBD risk. Further studies with large populations are needed to verify this relationship.
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- 2018
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34. Molecular Targeting of the Oncoprotein PLK1 in Pediatric Acute Myeloid Leukemia: RO3280, a Novel PLK1 Inhibitor, Induces Apoptosis in Leukemia Cells
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Lan Cao, Xue-Ming Zhu, Yanhong Li, Guang-Hao Su, Mei-Fang Jin, Jian Wang, Jian Ni, Zhi-Heng Li, Shaoyan Hu, Peifang Xiao, Yan-Fang Tao, Lin Liu, Yi Wu, He Zhao, Yunyun Xu, Xiao-Juan Du, Yi-Ping Li, Huiting Zhou, Jian Pan, Fang Fang, Wenli Zhao, Na-Na Wang, Xing Feng, Gang Li, Jun Lu, Li-Xiao Xu, and Lichao Sun
- Subjects
Male ,Myeloid ,Cell Cycle Proteins ,Kaplan-Meier Estimate ,lcsh:Chemistry ,pediatric acute myeloid leukemia (AML) ,hemic and lymphatic diseases ,Tumor Cells, Cultured ,Cluster Analysis ,Child ,lcsh:QH301-705.5 ,Spectroscopy ,polo-like kinase 1 (PLK1) ,Acute leukemia ,biology ,Kinase ,apoptosis ,RO3280 ,Azepines ,General Medicine ,Cell cycle ,Up-Regulation ,Computer Science Applications ,Leukemia, Myeloid, Acute ,Leukemia ,medicine.anatomical_structure ,Child, Preschool ,Female ,Down-Regulation ,HL-60 Cells ,DNA Fragmentation ,Protein Serine-Threonine Kinases ,Article ,Catalysis ,Inorganic Chemistry ,Proto-Oncogene Proteins ,Acute lymphocytic leukemia ,medicine ,Humans ,Bruton's tyrosine kinase ,Physical and Theoretical Chemistry ,Protein Kinase Inhibitors ,Molecular Biology ,Organic Chemistry ,Cell Cycle Checkpoints ,medicine.disease ,Pyrimidines ,lcsh:Biology (General) ,lcsh:QD1-999 ,biology.protein ,Cancer research ,oncogene target ,K562 Cells ,K562 cells - Abstract
Polo-like kinase 1 (PLK1) is highly expressed in many cancers and therefore a biomarker of transformation and potential target for the development of cancer-specific small molecule drugs. RO3280 was recently identified as a novel PLK1 inhibitor, however its therapeutic effects in leukemia treatment are still unknown. We found that the PLK1 protein was highly expressed in leukemia cell lines as well as 73.3% (11/15) of pediatric acute myeloid leukemia (AML) samples. PLK1 mRNA expression was significantly higher in AML samples compared with control samples (82.95 ± 110.28 vs. 6.36 ± 6.35, p <, 0.001). Kaplan-Meier survival analysis revealed that shorter survival time correlated with high tumor PLK1 expression (p = 0.002). The 50% inhibitory concentration (IC50) of RO3280 for acute leukemia cells was between 74 and 797 nM. The IC50 of RO3280 in primary acute lymphocytic leukemia (ALL) and AML cells was between 35.49 and 110.76 nM and 52.80 and 147.50 nM, respectively. RO3280 induced apoptosis and cell cycle disorder in leukemia cells. RO3280 treatment regulated several apoptosis-associated genes. The regulation of DCC, CDKN1A, BTK, and SOCS2 was verified by western blot. These results provide insights into the potential use of RO3280 for AML therapy, however, the underlying mechanisms remain to be determined.
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- 2015
35. Relationship between vitamin D (1,25-dihydroxyvitamin D3) receptor gene polymorphisms and primary biliary cirrhosis risk: a meta-analysis
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Gen Li, Jinlan Pan, Li-Xiao Xu, Fang Fang, Jian Wang, and Guang-Hao Su
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Vitamin ,medicine.medical_specialty ,Genotype ,TaqI ,Subgroup analysis ,Biology ,Calcitriol receptor ,Gastroenterology ,White People ,chemistry.chemical_compound ,Primary biliary cirrhosis ,Asian People ,Risk Factors ,Internal medicine ,Genetic model ,Genetics ,medicine ,Vitamin D and neurology ,Humans ,Genetic Predisposition to Disease ,Vitamin D ,Molecular Biology ,Genetic Association Studies ,Liver Cirrhosis, Biliary ,General Medicine ,medicine.disease ,chemistry ,Meta-analysis ,Immunology ,Receptors, Calcitriol ,Polymorphism, Restriction Fragment Length - Abstract
The vitamin D (1,25-dihydroxyvitamin D3) receptor (VDR) gene encodes a protein that functions in the transcriptional regulation of vitamin D-responsive genes and plays a role in innate immunity and adaptive immune responses. In this study, we investigated the relationship between VDR polymorphisms (BsmI, ApaI, and TaqI) and primary biliary cirrhosis (PBC) risk. We conducted an overall meta-analysis and subgroup meta-analysis based on ethnicity that included a total of 6 eligible studies (672 cases and 1148 controls). We detected no significant PBC risk variation for all genetic models in the overall analysis and in the subgroup analysis based on ethnicity for the BsmI polymorphism. For the ApaI polymorphism, significant associations were observed in the overall analysis as well as in the Asian subgroup. Furthermore, in the subgroup analysis based on ethnicity, a significant association was observed in the Caucasian subgroup but not in the Asian subgroup for the TaqI polymorphism. Based on the results of our meta-analysis, the VDR BsmI polymorphism may not be associated with PBC risk, while the VDR ApaI polymorphism is likely associated with PBC risk, particularly in Asians. The VDR TaqI polymorphism may be associated with PBC risk in Caucasians.
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- 2015
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36. Association between alcohol dehydrogenase 1C gene *1/*2 polymorphism and pancreatitis risk: a meta-analysis
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Jian Pan, Li-Xiao Xu, Fang Fang, Zhi-Heng Li, Guang-Hao Su, Jian Wang, Gen Li, and He Zhao
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medicine.medical_specialty ,Genotype ,Bioinformatics ,Gastroenterology ,Risk Factors ,Internal medicine ,Odds Ratio ,Genetics ,medicine ,Humans ,Genetic Predisposition to Disease ,Allele ,Alcohol Dehydrogenase 1C ,Molecular Biology ,Gene ,Alleles ,Polymorphism, Genetic ,business.industry ,Alcohol Dehydrogenase ,Chronic alcoholic ,General Medicine ,Odds ratio ,medicine.disease ,Confidence interval ,Pancreatitis ,Case-Control Studies ,Meta-analysis ,business - Abstract
Numerous studies have focused on the relationship be-tween alcohol dehydrogenase 1C gene (ADH1C) *1/*2 polymorphism (Ile350Val, rs698, also known as ADH1C *1/*2) and pancreatitis risk, but the results have been inconsistent. Thus, we conducted a meta-anal-ysis to more precisely estimate this association. Relevant publications were searched in several widely used databases and 9 eligible studies were included in the meta-analysis. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the association. Significant associations between ADH1C *1/*2 poly-morphism and pancreatitis risk were observed in both overall meta-analysis for 12 vs 22 (OR = 1.53, 95%CI = 1.12-2.10) and 11 + 12 vs 22 (OR = 1.44, 95%CI = 1.07-1.95), and the chronic alcoholic pancre-atitis subgroup for 12 vs 22 (OR = 1.64, 95%CI = 1.17-2.29) and 11 + 12 vs 22 (OR = 1.53, 95%CI = 1.11-2.11). Significant pancreatitis risk variation was also detected in Caucasians for 11 + 12 vs 22 (OR = 1.45, 95%CI = 1.07-1.98). In conclusion, the ADH1C *1/*2 polymorphism is likely associated with pancreatitis risk, particularly chronic alcoholic pancreatitis risk, with the *1 allele functioning as a risk factor.
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- 2015
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37. Identification of Potential Transcriptomic Markers in Developing Ankylosing Spondylitis: A Meta-Analysis of Gene Expression Profiles
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Jian Wang, Li-Xiao Xu, Jian Pan, Fang Fang, and Gang Li
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Article Subject ,Microarray ,lcsh:Medicine ,Biology ,General Biochemistry, Genetics and Molecular Biology ,Transcriptome ,Databases, Genetic ,medicine ,Cluster Analysis ,Humans ,Spondylitis, Ankylosing ,Spondylitis ,Gene ,Oligonucleotide Array Sequence Analysis ,Rank product ,Regulation of gene expression ,Genetics ,Ankylosing spondylitis ,General Immunology and Microbiology ,Gene Expression Profiling ,lcsh:R ,General Medicine ,medicine.disease ,Gene expression profiling ,Gene Expression Regulation ,Case-Control Studies ,Biomarkers ,Research Article - Abstract
The goal of this study was to identify potential transcriptomic markers in developing ankylosing spondylitis by a meta-analysis of multiple public microarray datasets. Using the INMEX (integrative meta-analysis of expression data) program, we performed the meta-analysis to identify consistently differentially expressed (DE) genes in ankylosing spondylitis and further performed functional interpretation (gene ontology analysis and pathway analysis) of the DE genes identified in the meta-analysis. Three microarray datasets (26 cases and 29 controls in total) were collected for meta-analysis. 905 consistently DE genes were identified in ankylosing spondylitis, among which 482 genes were upregulated and 423 genes were downregulated. The upregulated gene with the smallest combined rank product (RP) wasGNG11(combinedRP=299.64). The downregulated gene with the smallest combined RP wasS100P(combinedRP=335.94). In the gene ontology (GO) analysis, the most significantly enriched GO term was “immune system process” (P=3.46×10-26). The most significant pathway identified in the pathway analysis was antigen processing and presentation (P=8.40×10-5). The consistently DE genes in ankylosing spondylitis and biological pathways associated with those DE genes identified provide valuable information for studying the pathophysiology of ankylosing spondylitis.
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- 2015
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38. Molecular mechanism of G1 arrest and cellular senescence induced by LEE011, a novel CDK4/CDK6 inhibitor, in leukemia cells
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Jian Pan, Jian Wang, Na-Na Wang, Xing Feng, Yan-Fang Tao, Zhi-Heng Li, Yunyun Xu, Yi Wu, Guang-Hui Qian, Li-Xiao Xu, Mei Li, Xiaolu Li, Jun Lu, Junli Ren, Wei-Wei Du, Wei-Qi He, Fang Fang, Yanhong Li, Yi-Ping Li, and Shaoyan Hu
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0301 basic medicine ,Senescence ,Cancer Research ,Cell ,Biology ,Cellular senescence ,Arraystar Human LncRNA array ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Genetics ,CDK4/6 ,LEE011 ,Propidium iodide ,Acute leukemia ,Leukemia ,Cell growth ,Cell cycle ,medicine.disease ,Cell biology ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,Oncology ,030220 oncology & carcinogenesis ,biology.protein ,Cyclin-dependent kinase 6 ,Primary Research - Abstract
Background Overexpression of cyclin D1 dependent kinases 4 and 6 (CDK4/6) is a common feature of many human cancers including leukemia. LEE011 is a novel inhibitor of both CDK4 and 6. To date, the molecular function of LEE011 in leukemia remains unclear. Methods Leukemia cell growth and apoptosis following LEE011 treatment was assessed through CCK-8 and annexin V/propidium iodide staining assays. Cell senescence was assessed by β-galactosidase staining and p16INK4a expression analysis. Gene expression profiles of LEE011 treated HL-60 cells were investigated using an Arraystar Human LncRNA array. Gene ontology and KEGG pathway analysis were then used to analyze the differentially expressed genes from the cluster analysis. Results Our studies demonstrated that LEE011 inhibited proliferation of leukemia cells and could induce apoptosis. Hoechst 33,342 staining analysis showed DNA fragmentation and distortion of nuclear structures following LEE011 treatment. Cell cycle analysis showed LEE011 significantly induced cell cycle G1 arrest in seven of eight acute leukemia cells lines, the exception being THP-1 cells. β-Galactosidase staining analysis and p16INK4a expression analysis showed that LEE011 treatment can induce cell senescence of leukemia cells. LncRNA microarray analysis showed 2083 differentially expressed mRNAs and 3224 differentially expressed lncRNAs in LEE011-treated HL-60 cells compared with controls. Molecular function analysis showed that LEE011 induced senescence in leukemia cells partially through downregulation of the transcriptional expression of MYBL2. Conclusions We demonstrate for the first time that LEE011 treatment results in inhibition of cell proliferation and induction of G1 arrest and cellular senescence in leukemia cells. LncRNA microarray analysis showed differentially expressed mRNAs and lncRNAs in LEE011-treated HL-60 cells and we demonstrated that LEE011 induces cellular senescence partially through downregulation of the expression of MYBL2. These results may open new lines of investigation regarding the molecular mechanism of LEE011 induced cellular senescence. Electronic supplementary material The online version of this article (doi:10.1186/s12935-017-0405-y) contains supplementary material, which is available to authorized users.
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- 2017
39. Clinical trials, progression-speed differentiating features and swiftness rule of the innovative targets of first-in-class drugs
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Li, Ying Hong, primary, Li, Xiao Xu, additional, Hong, Jia Jun, additional, Wang, Yun Xia, additional, Fu, Jian Bo, additional, Yang, Hong, additional, Yu, Chun Yan, additional, Li, Feng Cheng, additional, Hu, Jie, additional, Xue, Wei Wei, additional, Jiang, Yu Yang, additional, Chen, Yu Zong, additional, and Zhu, Feng, additional
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- 2019
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40. Clinical features of Langerhans cell histiocytosis in the sellar region.
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WANG Zhi-cheng, ZHU Jian-yu, ZHANG Yi, LI Xiao-xu, LIU Jie, ZHU Hui-juan, YAO Yong, PAN Hui, and DENG Kan
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BIOPSY ,DIFFERENTIAL diagnosis ,ENDOSCOPY ,MAGNETIC resonance imaging ,SPHENOID bone ,SYMPTOMS ,RETROSPECTIVE studies ,LANGERHANS-cell histiocytosis - Abstract
Objective To summarize the clinical characteristics of Langerhans cell histiocytosis (LCH) in sellar region, to explore the indication and safety of pathological biopsy in sellar region. Methods and Results Eight patients with LCH who underwent biopsy by endoscopic transsphenoidal approach from November 2011 to November 2019 were retrospectively analyzed. The ratio of male to female was 1 : 1. The median age of 8 patients was 15.50 years old. All patients had central diabetes insipidus as the inaugural manifestation, and 7 patients had hypothalamus-related symptoms. Lesions in 7 patients involved the pituitary stalk, and in 5 patients involved the intrasellar region. The most common site of involvement was both intrasellar region and pituitary stalk (3 patients), followed by both pituitary stalk and hypothalamus (2 patients). MRI showed isointensity (8 cases) on T
1 WI, isointensity (6 cases), hypointensity (one case) and heterogeneous intensity (one case) on T2 WI, while 6 with homogeneous enhancement and 2 with heterogeneous enhancement. The hyperintensity on T1 WI of posterior pituitary was absent in all patients. The posterior pituitary bright spot was absent in all patients. Only one patient had a transient hypothalamic dysfunction after operation. None patient had cerebrospinal fluid leakage, central nervous system infection, unplanned secondary operation, death and other adverse events within one month after operation. Conclusions There were no specific clinical manifestations for LCH in sellar region, and this disease should be considered to differentiate from pituitary adenomas, germ cell tumor and lymphocytic hypophysitis. Biopsy was considered as "gold standard" for diagnosis. And biopsy by endoscopic transsphenoidal approach was a safe and reliable way for confirmation. [ABSTRACT FROM AUTHOR]- Published
- 2020
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41. Clinical trials, progression-speed differentiating features and swiftness rule of the innovative targets of first-in-class drugs.
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Li, Ying Hong, Li, Xiao Xu, Hong, Jia Jun, Wang, Yun Xia, Fu, Jian Bo, Yang, Hong, Yu, Chun Yan, Li, Feng Cheng, Hu, Jie, Xue, Wei Wei, Jiang, Yu Yang, Chen, Yu Zong, and Zhu, Feng
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Drugs produce their therapeutic effects by modulating specific targets, and there are 89 innovative targets of first-in-class drugs approved in 2004–17, each with information about drug clinical trial dated back to 1984. Analysis of the clinical trial timelines of these targets may reveal the trial-speed differentiating features for facilitating target assessment. Here we present a comprehensive analysis of all these 89 targets, following the earlier studies for prospective prediction of clinical success of the targets of clinical trial drugs. Our analysis confirmed the literature-reported common druggability characteristics for clinical success of these innovative targets, exposed trial-speed differentiating features associated to the on-target and off-target collateral effects in humans and further revealed a simple rule for identifying the speedy human targets through clinical trials (from the earliest phase I to the 1st drug approval within 8 years). This simple rule correctly identified 75.0% of the 28 speedy human targets and only unexpectedly misclassified 13.2% of 53 non-speedy human targets. Certain extraordinary circumstances were also discovered to likely contribute to the misclassification of some human targets by this simple rule. Investigation and knowledge of trial-speed differentiating features enable prioritized drug discovery and development. [ABSTRACT FROM AUTHOR]
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- 2020
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42. The postoperative infections after endoscopic transsphenoidal surgery for growth hormone-secreting pituitary adenoma.
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ZHU Jian-yu, WANG Zhi-cheng, ZHANG Yi, LI Xiao-xu, LIU Jie, DENG Kan, WANG Ren-zhi, and YAO Yong
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SURGICAL complication risk factors ,ACROMEGALY ,CONFIDENCE intervals ,ENDOSCOPY ,INFECTION ,RISK assessment ,SPHENOID sinus ,DISEASE incidence ,DESCRIPTIVE statistics ,GROWTH hormone-secreting pituitary adenoma - Abstract
Objective To explore the characteristics, risk factors of postoperative infections for patients with growth hormone (GH)-secreting pituitary adenoma after endoscopic transsphenoidal surgery, and to share the experience of diagnosis and treatment of these patients. Methods A total of 122 patients with GH-secreting pituitary adenoma who underwent endoscopic transsphenoidal surgery were included from January 2016 to October 2019, and the data of postoperative body temperature, postoperative infection and related possible risk factors were analyzed. Results The incidence of postoperative infections in patients with acromegaly was significantly higher than that with other types of pituitary adenomas [9.84% (12/122) vs. 3.77% (8/212), P = 0.025]. Central nervous system infection (7 cases) and bacteremia (4 cases) were the most common types of infections. Gram-negative bacilli were predominant (10 cases). The postoperative peak body temperature of patients with infections (12 cases) was significantly higher (P = 0.000) and appeared later than non-infectious group (110 cases, P = 0.000). Multivariate Logistic analysis showed that intraoperative cerebrospinal fluid leakage (OR = 5.520, 95%CI: 1.193-25.551; P = 0.029) and female (OR = 7.804, 95% CI: 1.088-55.948; P = 0.041) patients were major risk factors for postoperative infections. Conclusions For patients with GH-secreting pituitary adenoma who underwent endoscopic surgery, postoperative infections were uncommon but serious complication, especially for females, for those who experienced intraoperative cerebrospinal fluid leakage and postoperative peak body temperature delayed. Early identification and timely treatment are very important. Empirical anti-infective treatment should cover Gram-negative bacteria. Repair using autologous fat fascia and nasoseptal flap may reduce the incidence of postoperative infections in patients who suffered severe cerebrospinal fluid leakage. [ABSTRACT FROM AUTHOR]
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- 2020
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43. Clinical analysis of six cases with metastatic carcinoma in sellar region.
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LI Xiao-xu, DENG Kan, YOU Hui, ZHANG Yi, WANG Zhi-cheng, ZHU Jian-yu, FENG Ming, ZHU Hui-juan, WANG Ren-zhi, and YAO Yong
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DIFFERENTIAL diagnosis ,HEADACHE ,METASTASIS ,PITUITARY gland ,PITUITARY tumors ,RARE diseases ,VISION disorders ,SYMPTOMS - Abstract
Objective Metastatic carcinoma in sellar region is a rare disease. This article is to discuss the metastatic origin, clinical manifestations, diagnosis and differential diagnosis of metastatic carcinoma in sellar region, and to summarize the experience in diagnosis and treatment of disease. Methods and Results From January 2014 to October 2019, six patients with metastatic carcinoma in sellar region were confirmed by pathological examinations after endoscopic or microscopic transsphenoidal surgery. Four patients presented with mass effect in sellar region as the first manifestation, and 2 patients were associated with a history of malignant neoplasm. The common clinical manifestations were headache and visual disturbance. The lesions mainly involved cavernous sinus and pituitary gland. Three patients whose lesions involved adenohypophysis presented with pituitary hypofunction, of which 2 patients were diagnosed as non-functional pituitary adenoma on admission. Conclusions Presentations associated with metastatic carcinoma in sellar region can be the first manifestation of malignant neoplasm. Compared with pituitary adenomas, metastatic carcinoma in sellar region is more prone to present with diabetes insipidus and pituitary hypofunction. Relying solely on imaging diagnosis is relatively limited, and differential diagnosis should be considered in multiple aspects to reduce the misdiagnosis rate. [ABSTRACT FROM AUTHOR]
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- 2020
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44. Global warming and artificial shorelines reshape seashore biogeography.
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Wang, Wei, Wang, Jie, Choi, Francis M. P., Ding, Ping, Li, Xiao‐xu, Han, Guo‐dong, Ding, Meng‐wen, Guo, Minquan, Huang, Xiong‐wei, Duan, Wei‐xiang, Cheng, Zhi‐yuan, Chen, Zhi‐yuan, Hawkins, Stephen J., Jiang, Yuwu, Helmuth, Brian, Dong, Yun‐wei, and Dornelas, Maria
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BIOGEOGRAPHY ,GEOTHERMAL ecology ,GLOBAL warming ,SHORELINES ,CLIMATE change ,INTERTIDAL animals ,LARVAL dispersal - Abstract
Aim: Rapid anthropogenic warming coupled with changes in land use is altering the distributions of species, with consequences for ecosystem functioning and services. It is crucial to evaluate species range shifts based on understanding of the interaction of temperature with non‐climatic factors such as habitat availability and dispersal potential. Here, we aim to investigate roles of environmental temperature, habitat availability and population connectivity on the distributions of hard‐shore intertidal animals. We further examine potential roles of extensive artificial seawall construction in enabling poleward expansion of species in China, thus reshaping coastal biogeography. Location: Chinese coast. Time period: 2013–2017. Major taxa studied: Intertidal invertebrates. Methods: We took an integrative approach encompassing distributional ecology, thermal physiology, molecular genetics, heat budget modelling and larval dispersal to elucidate how interacting multiple drivers, including temperature, habitat availability and larval dispersal, determine distributions of hard‐shore invertebrates, focusing on what sets their range edges at a boundary between biogeographic provinces. Results: Our results untangle the complex interactions of global climate change with the impacts of regional scale coastal development. Temperature, larval transport and habitat availability are the major proximate factors controlling the range limits of coastal marine species. The artificial shorelines provide suitable habitats for hard‐shore species on the Yangtze River Delta, and minimum temperature in winter is an important factor setting the new northern range limit of these hard‐shore species along the Chinese coast. Main conclusions: In the face of global warming and global sprawl of marine hard infrastructure, species distributions, community structures and biogeographic patterns are experiencing dramatic changes. The combined influence of multiple human stressors including climate change and artificial shorelines can be evaluated by using a multidisciplinary framework, including ecological distribution, physiological sensitivity of species to these stressors, and the role of dispersal in maintaining population connectivity. [ABSTRACT FROM AUTHOR]
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- 2020
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45. Determining the Balance Between Drug Efficacy and Safety by the Network and Biological System Profile of Its Therapeutic Target
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Li, Xiao xu, primary, Yin, Jiayi, additional, Tang, Jing, additional, Li, Yinghong, additional, Yang, Qingxia, additional, Xiao, Ziyu, additional, Zhang, Runyuan, additional, Wang, Yunxia, additional, Hong, Jiajun, additional, Tao, Lin, additional, Xue, Weiwei, additional, and Zhu, Feng, additional
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- 2018
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46. Easily Tunable Membrane Thickness of Microcapsules by Using a Coordination Assembly on the Liquid-Liquid Interface
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Li, Bei-xing, primary, Li, Xiao-xu, additional, Liu, Yang, additional, Zhang, Da-xia, additional, Lin, Jin, additional, Mu, Wei, additional, and Liu, Feng, additional
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- 2018
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47. Electronic Supplementary Material from Untangling the roles of microclimate, behaviour and physiological polymorphism in governing vulnerability of intertidal snails to heat stress
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Dong, Yun-Wei, Li, Xiao-Xu, Choi, Francis M. P., Williams, Gray A., Somero, George N., and Helmuth, Brian
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Biogeographic distributions are driven by cumulative effects of smaller scale processes. Thus, vulnerability of animals to thermal stress is the result of physiological sensitivities to body temperature (Tb), microclimatic conditions, and behavioural thermoregulation. To understand interactions among these variables, we analysed the thermal tolerances of three species of intertidal snails from different latitudes along the Chinese coast, and estimated potential Tb in different microhabitats at each site. We then empirically determined the temperatures at which heart rate decreased sharply with rising temperature (Arrhenius breakpoint temperature, ABT) and at which it fell to zero (flat line temperature, FLT) to calculate thermal safety margins (TSM). Regular exceedance of FLT in sun-exposed microhabitats, a lethal effect, was predicted for only one mid-latitude site. However, ABTs of some individuals were exceeded at sun-exposed microhabitats in most sites, suggesting physiological impairment for snails with poor behavioural thermoregulation and revealing inter-individual variations (physiological polymorphism) of thermal limits. An autocorrelation analysis of Tb showed that predictability of extreme temperatures was lowest at the hottest sites, indicating that the effectiveness of behavioural thermoregulation is potentially lowest at these sites. These results illustrate the critical roles of mechanistic studies at small spatial scales when predicting effects of climate change.
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- 2017
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48. A novel sphingosine kinase 1 inhibitor (SKI-5C) induces cell death of Wilms' tumor cells
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Zhi-Heng, Li, Yan-Fang, Tao, Li-Xiao, Xu, He, Zhao, Xiao-Lu, Li, Fang, Fang, Yi, Wu, Jun, Lu, Yan-Hong, Li, Wei-Wei, Du, Jun-Li, Ren, Yi-Ping, Li, Yun-Yun, Xu, Xing, Feng, Jian, Wang, Wei-Qi, He, and Jian, Pan
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Original Article ,human activities - Abstract
Sphingosine kinase 1 (SphK1) is over-expressed in many cancers and therefore serves as a biomarker for cancer prognosis. SKI-5C is a new SphK1 inhibitor, and until now its molecular function in Wilms’ tumor cells remained unknown. Here, using CCK-8 and nude mice experiments we assessed cell growth in Wilms’ tumor cell lines (SK-NEP-1 and G401) in vitro and in vivo. We demonstrated that SphK1 is highly expressed in SK-NEP-1 and G401 cells, and through annexin V/propidium iodide staining and flow cytometry analysis, we detected cell apoptosis. Treatment with SKI-5C inhibited proliferation and induced apoptosis of SK-NEP-1 and G401 cells in a dose-dependent manner. Moreover, SKI-5C treatment inhibited the growth of SK-NEP-1 xenograft tumors in nude mice, with few side effects. Our microarray analysis revealed that SKI-5C-treated SK-NEP-1 cells mostly downregulated PRKACA and significantly inhibited phosphorylation of ERK1/2 and NF-κB p65. These results imply that SKI-5C induces apoptosis of SK-NEP-1 cells through the PRKACA/MAPK/NF-κB pathway. While, further research is required to determine the underlying details, these results provide new clues for the molecular mechanism of cell death induced by SKI-5C and suggest that SKI-5C may act as new candidate drug for Wilms’ tumor.
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- 2016
49. Therapeutic target database update 2018: enriched resource for facilitating bench-to-clinic research of targeted therapeutics
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Li, Ying Hong, primary, Yu, Chun Yan, primary, Li, Xiao Xu, primary, Zhang, Peng, primary, Tang, Jing, primary, Yang, Qingxia, primary, Fu, Tingting, primary, Zhang, Xiaoyu, primary, Cui, Xuejiao, primary, Tu, Gao, primary, Zhang, Yang, primary, Li, Shuang, primary, Yang, Fengyuan, primary, Sun, Qiu, primary, Qin, Chu, primary, Zeng, Xian, primary, Chen, Zhe, primary, Chen, Yu Zong, primary, and Zhu, Feng, primary
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- 2017
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50. p21-activated kinase 1 (PAK1) expression correlates with prognosis in solid tumors: A systematic review and meta-analysis
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Xing Feng, Guang-Hao Su, Jian Wang, Yi-Ping Li, Gang Li, Li-Xiao Xu, Jian Pan, Zhi-Heng Li, and Fang Fang
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0301 basic medicine ,Oncology ,medicine.medical_specialty ,survival ,Disease-Free Survival ,Gene Expression Regulation, Enzymologic ,03 medical and health sciences ,0302 clinical medicine ,PAK1 ,Internal medicine ,Neoplasms ,Biomarkers, Tumor ,Medicine ,Humans ,Predictive marker ,business.industry ,Kinase ,Hazard ratio ,Prognosis ,Confidence interval ,Gene Expression Regulation, Neoplastic ,meta-analysis ,030104 developmental biology ,p21-Activated Kinases ,Tumor progression ,030220 oncology & carcinogenesis ,Meta-analysis ,P21 Activated Kinase 1 ,solid tumor ,business ,Research Paper - Abstract
p21 protein (Cdc42/Rac)-activated kinase 1 (PAK1) expression appears to be predictive of prognosis in various solid tumors, though the evidence is not yet conclusive. We therefore performed a meta-analysis to explore the relationship between PAK1 and prognosis in patients with solid tumors. Relevant publications were searched in several widely used databases, and 15 studies (3068 patients) were included in the meta-analysis. Pooled hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the association between PAK1 and prognosis. Associations between PAK1 expression and prognosis were observed for overall survival (HR = 2.81, 95% CI = 1.07-7.39) and disease-specific survival (HR = 2.15, 95% CI = 1.47-3.16). No such association was detected for time to tumor progression (HR = 1.78, 95% CI = 0.99-3.21).Our meta-analysis thus indicates that PAK1 expression may be a predictive marker of overall survival and disease-specific survival in patients with solid tumors.
- Published
- 2015
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