Wettability is an important surface property that deserves to further explore the factors on its alteration.Series of bis-N-heterocyclic quaternary ammonium salts with different spacer length and N-heterocyclic headgr...Wettability is an important surface property that deserves to further explore the factors on its alteration.Series of bis-N-heterocyclic quaternary ammonium salts with different spacer length and N-heterocyclic headgroups(morpholinium(BMMB,BMMD and BMMH),piperidinium(BPMH)and piperazinium(BMPMH))have been synthesized and employed for altering the wettability of vermiculite and its derivates(Vts)treated by Li^(+)-saturated heating method.The results of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TG-DTG),scanning electron microscopy(SEM)and N_(2)adsorption/desorption isotherms indicate that all of the bis-N-heterocyclic quaternary ammonium salts have been successfully inserted into the vermiculite layers,leading to the organic monolayer.The results of capillary rise tests combined with Lipophilic to Hydrophilic Ratio(LHR)values unveil the wettability alteration of the organo-Vts.As the layer charge decreases,the hydrophilicity of the organo-Vts gradually increases,which is probably caused by the decline in binding sites.As the result of the change in spacer length of modifier,the wetting properties of morpholinium-based organo-Vts change in order of BMMD-Vts>BMMH-Vts>BMMB-Vts,and difference in N-heterocyclic headgroups leads to the sequence of wettability:BMPMH-Vts>BPMH-Vts>BMMH-Vts.Layer charge of Vt,spacer length and the type of the N-heterocyclic headgroup of modifier have the synergistic effect on the regulation of the wettability.展开更多
BACKGROUND:The effect of pituitary adenylate cyclase activating polypeptide(PACAP)during traumatic brain injury(TBI) and whether it can modulate secondary injury has not been reported previously.The present study eval...BACKGROUND:The effect of pituitary adenylate cyclase activating polypeptide(PACAP)during traumatic brain injury(TBI) and whether it can modulate secondary injury has not been reported previously.The present study evaluated the potential protective effects of ventricular infusion of PACAP in a rat model of TBI.METHODS:Male Sprague Dawley rats were randomly divided into 3 treatment groups(n=6,each):sham-operated,vehicle(normal saline)^+TBI,and PACAP^+TBI.Normal saline or PACAP(1 ug/5uL) was administered intracerebroventricularly 20 minutes before TBI.Right parietal cortical contusion was produced via a weight-dropping method.Brains were extracted 24 hours after trauma.Histological changes in brains were examined by HE staining.The numbers of CD4^+ and CD8^+ T cells in blood and the spleen were detected via flow cytometry.RESULTS:In injured brain regions,edema,hemorrhage,inflammatory cell infiltration,and swollen and degenerated neurons were observed under a light microscope,and the neurons were disorderly arrayed in the hippocampi.Compared to the sham group,average CD4^+ CD8" lymphocyte counts in blood and the spleen were significantly decreased in rats that received TBI^+vehicle,and CD4^+ CD8^+ were increased.In rats administered PACAP prior to TBI,damage was attenuated as evidenced by significantly increased CD4^+,and decreased CD8^+,T lymphocytes in blood and the spleen.CONCLUSION:Pretreatment with PACAP may protect against TBI by influencing periphery T cellular immune function.展开更多
Objective:To study the expression and significance of KAI1/CD82, p27 proteins in gastric carcinoma.Methods: The expressions of KAI1/CD82, p27 proteins were detected by immunohistchemistry S-P method in 58 cases of gas...Objective:To study the expression and significance of KAI1/CD82, p27 proteins in gastric carcinoma.Methods: The expressions of KAI1/CD82, p27 proteins were detected by immunohistchemistry S-P method in 58 cases of gastric carcinoma tissues and 23 normal gastric tissues.Results: The positive rates of KAI1/CD82 and p27 proteins in gastric carcinoma tissues were 29.3% and 34.4%, but 90% and 85% respectively in normal gastric tissue. And there is a significant difference between the two groups. The expression level of KAI1/CD82 and p27 proteins was significantly related to tumor invasive depth, grade of tumor differentiation, the clinical stage and lymph node metastasis, And has nothing to do with age or gender. There was a positive correlation between the expression of KAI1/CD82 and P27 in gastric cancer tissues.Conclusion: The expression of KAI1/CD82 and p27 protein may be involved in the initiation and development in gastric carcinoma, and the combined detection of KAI1/CD82 and p27 proteins may be significant in predicting the invision and metastasis of gastric carcinoma.展开更多
AIM:To examine whether 2'-5'oligoadenylate synthetase (OAS) gene promoter can be specifically activated by hepatitis C virus (HCV)-core protein.METHODS: Human embryo hepatic cell line L02 wa transfected with p...AIM:To examine whether 2'-5'oligoadenylate synthetase (OAS) gene promoter can be specifically activated by hepatitis C virus (HCV)-core protein.METHODS: Human embryo hepatic cell line L02 wa transfected with pcDNA3.1-core plasmid and selected by G418. Expression of HCV-core was detected by reverse transcription polymerase chain reaction and Western blotting. The OAS promoter sequence wa amplified from the genomic DNA and inserted into pGL3-basic vector. The resultant pGL3-OAS-Luc plasmid was transiently transfected into L02/core cell and luciferase activity was assayed. RESULTS: L02/core cell line stably expressing HCV core protein was established. The pGL3-OAS-Luc construct exhibited significant transcriptional activity in the L02/core cells but not in the L02 cells.CONCLUSION: HCV-core protein activates the OAS gene promoter specifically and effectively. Utilization of OAS gene promoter would be an ideal strategy for developing HCV-specific gene therapy.展开更多
For further understanding the wettability alteration induced by organic salts,series of bis-imidazolium salts(EBMI,TBMI,HBMI,OBMI and DBMI) were employed for investigating their adsorption behavior and wettability alt...For further understanding the wettability alteration induced by organic salts,series of bis-imidazolium salts(EBMI,TBMI,HBMI,OBMI and DBMI) were employed for investigating their adsorption behavior and wettability alteration on vermiculite(Vt) by experimental and theoretical studies.The characterization results indicated that all bis-imidazolium salts had been loaded on Vts.The adsorption results showed that EBMI,TBMI,HBMI,OBMI and DBMI on Vt reached equilibrium of 0.159,0.156,0.145,0.114 and 0.084 mmol g-1 around 30 min at 25℃,respectively,which were sensitive to ionic strength and pH.Langmuir,statistical physical modelling and pseudo-second-order models could be well fitted with the adsorption data,and thermodynamic parameters suggested that the adsorption processes of bis-imidazolium salts were endothermic and spontaneous,indicating that the resultant bis-imidazolium salts could be self-assembled onto Vt in the form of the monolayer.Results of molecular dynamic simulation showed that bis-imidazolium salts were adsorbed on Vt with the lying-flat configuration,and the electrostatic interaction acted as the main interaction mechanism,which were consistent with that obtained experimentally.Changes of wettability of Vt induced by bis-imidazolium salts were verified by capillary rise experiments.Interestingly,the wettability of organo-Vts varied with the spacer length and the order was as follows:EBMI-Vt <TBMI-Vt <HBMI-Vt <OBMI-Vt <DBMI-Vt,which could be explained by their arrangements,hydrophobicity as well as the interaction energies.The longer the spacers of bisimidazolium salts,the greater the absolute values of the interaction energy,the less the adsorbed bisimidazolium salts,while the more hydrophobic of organo-Vt.This work aimed at revealing the adsorption behavior,mechanism as well as effect of bis-imidazolium salts on wettability alteration of negatively charged mineral surface,providing some information for the selection of flooding agent for enhanced oil recovery and wettability modifier.展开更多
Background:Wilson's disease(WD)is an autosomal recessive genetic disorder of copper metabolism,caused by mutations in the ATP7B gene,resulting in copper accumulation in the liver,brain,kidney,and cornea and leadin...Background:Wilson's disease(WD)is an autosomal recessive genetic disorder of copper metabolism,caused by mutations in the ATP7B gene,resulting in copper accumulation in the liver,brain,kidney,and cornea and leading to significant disability or death if untreated.Early diagnosis and proper therapy usually predict a good prognosis,especially in pre-symptomatic WD.Genetic testing is the most accurate and effective diagnostic method for early diagnosis.Methods:The clinical and biochemical features of three unrelated Han Chinese families with pre-symptomatic WD were reported.The molecular defects in these families were investigated by polymerase chain reaction and DNA sequencing.Hundred healthy children with the same ethnic background served as controls.Bioinformatic tools(polymorphism phenotyping-2,sorting intolerant from tolerant,protein analysis through evolutionary relationships,and predictor of human deleterious single nucleotide polymorphisms)were combined and used to predict the functional effects of mutations.Results:We identified 2 novel ATP7B mutations(p.Leu692Pro and p.Asn728Ser)and 3 known mutations(p.Met769fs,p.Arg778Leu and p.Vall216Met)in these Chinese WD families.These mutations were not observed in the 100 normal controls.The bioinformatic method showed that p.Leu692Pro and p.Asn728Ser mutations are pathogenic.Conclusions:Our research enriches the mutation spectrum of the ATP7B gene worldwide and provides valuable information for studying the mutation types and mode of inheritance of ATP7B in the Chinese population.Liver function analysis and genetic testing in young children with WD are necessary to shorten the time to the initiation of therapy,reduce damage to the liver and brain,and improve prognosis.展开更多
基金This work is funded by the National Natural Science Foundation of China(Grant No.21776306).
文摘Wettability is an important surface property that deserves to further explore the factors on its alteration.Series of bis-N-heterocyclic quaternary ammonium salts with different spacer length and N-heterocyclic headgroups(morpholinium(BMMB,BMMD and BMMH),piperidinium(BPMH)and piperazinium(BMPMH))have been synthesized and employed for altering the wettability of vermiculite and its derivates(Vts)treated by Li^(+)-saturated heating method.The results of X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TG-DTG),scanning electron microscopy(SEM)and N_(2)adsorption/desorption isotherms indicate that all of the bis-N-heterocyclic quaternary ammonium salts have been successfully inserted into the vermiculite layers,leading to the organic monolayer.The results of capillary rise tests combined with Lipophilic to Hydrophilic Ratio(LHR)values unveil the wettability alteration of the organo-Vts.As the layer charge decreases,the hydrophilicity of the organo-Vts gradually increases,which is probably caused by the decline in binding sites.As the result of the change in spacer length of modifier,the wetting properties of morpholinium-based organo-Vts change in order of BMMD-Vts>BMMH-Vts>BMMB-Vts,and difference in N-heterocyclic headgroups leads to the sequence of wettability:BMPMH-Vts>BPMH-Vts>BMMH-Vts.Layer charge of Vt,spacer length and the type of the N-heterocyclic headgroup of modifier have the synergistic effect on the regulation of the wettability.
文摘BACKGROUND:The effect of pituitary adenylate cyclase activating polypeptide(PACAP)during traumatic brain injury(TBI) and whether it can modulate secondary injury has not been reported previously.The present study evaluated the potential protective effects of ventricular infusion of PACAP in a rat model of TBI.METHODS:Male Sprague Dawley rats were randomly divided into 3 treatment groups(n=6,each):sham-operated,vehicle(normal saline)^+TBI,and PACAP^+TBI.Normal saline or PACAP(1 ug/5uL) was administered intracerebroventricularly 20 minutes before TBI.Right parietal cortical contusion was produced via a weight-dropping method.Brains were extracted 24 hours after trauma.Histological changes in brains were examined by HE staining.The numbers of CD4^+ and CD8^+ T cells in blood and the spleen were detected via flow cytometry.RESULTS:In injured brain regions,edema,hemorrhage,inflammatory cell infiltration,and swollen and degenerated neurons were observed under a light microscope,and the neurons were disorderly arrayed in the hippocampi.Compared to the sham group,average CD4^+ CD8" lymphocyte counts in blood and the spleen were significantly decreased in rats that received TBI^+vehicle,and CD4^+ CD8^+ were increased.In rats administered PACAP prior to TBI,damage was attenuated as evidenced by significantly increased CD4^+,and decreased CD8^+,T lymphocytes in blood and the spleen.CONCLUSION:Pretreatment with PACAP may protect against TBI by influencing periphery T cellular immune function.
文摘Objective:To study the expression and significance of KAI1/CD82, p27 proteins in gastric carcinoma.Methods: The expressions of KAI1/CD82, p27 proteins were detected by immunohistchemistry S-P method in 58 cases of gastric carcinoma tissues and 23 normal gastric tissues.Results: The positive rates of KAI1/CD82 and p27 proteins in gastric carcinoma tissues were 29.3% and 34.4%, but 90% and 85% respectively in normal gastric tissue. And there is a significant difference between the two groups. The expression level of KAI1/CD82 and p27 proteins was significantly related to tumor invasive depth, grade of tumor differentiation, the clinical stage and lymph node metastasis, And has nothing to do with age or gender. There was a positive correlation between the expression of KAI1/CD82 and P27 in gastric cancer tissues.Conclusion: The expression of KAI1/CD82 and p27 protein may be involved in the initiation and development in gastric carcinoma, and the combined detection of KAI1/CD82 and p27 proteins may be significant in predicting the invision and metastasis of gastric carcinoma.
基金Supported by National Natural Science Foundation of China,No.30671846
文摘AIM:To examine whether 2'-5'oligoadenylate synthetase (OAS) gene promoter can be specifically activated by hepatitis C virus (HCV)-core protein.METHODS: Human embryo hepatic cell line L02 wa transfected with pcDNA3.1-core plasmid and selected by G418. Expression of HCV-core was detected by reverse transcription polymerase chain reaction and Western blotting. The OAS promoter sequence wa amplified from the genomic DNA and inserted into pGL3-basic vector. The resultant pGL3-OAS-Luc plasmid was transiently transfected into L02/core cell and luciferase activity was assayed. RESULTS: L02/core cell line stably expressing HCV core protein was established. The pGL3-OAS-Luc construct exhibited significant transcriptional activity in the L02/core cells but not in the L02 cells.CONCLUSION: HCV-core protein activates the OAS gene promoter specifically and effectively. Utilization of OAS gene promoter would be an ideal strategy for developing HCV-specific gene therapy.
基金funded by the National Natural Science Foundation of China[Grant No.21776306]。
文摘For further understanding the wettability alteration induced by organic salts,series of bis-imidazolium salts(EBMI,TBMI,HBMI,OBMI and DBMI) were employed for investigating their adsorption behavior and wettability alteration on vermiculite(Vt) by experimental and theoretical studies.The characterization results indicated that all bis-imidazolium salts had been loaded on Vts.The adsorption results showed that EBMI,TBMI,HBMI,OBMI and DBMI on Vt reached equilibrium of 0.159,0.156,0.145,0.114 and 0.084 mmol g-1 around 30 min at 25℃,respectively,which were sensitive to ionic strength and pH.Langmuir,statistical physical modelling and pseudo-second-order models could be well fitted with the adsorption data,and thermodynamic parameters suggested that the adsorption processes of bis-imidazolium salts were endothermic and spontaneous,indicating that the resultant bis-imidazolium salts could be self-assembled onto Vt in the form of the monolayer.Results of molecular dynamic simulation showed that bis-imidazolium salts were adsorbed on Vt with the lying-flat configuration,and the electrostatic interaction acted as the main interaction mechanism,which were consistent with that obtained experimentally.Changes of wettability of Vt induced by bis-imidazolium salts were verified by capillary rise experiments.Interestingly,the wettability of organo-Vts varied with the spacer length and the order was as follows:EBMI-Vt <TBMI-Vt <HBMI-Vt <OBMI-Vt <DBMI-Vt,which could be explained by their arrangements,hydrophobicity as well as the interaction energies.The longer the spacers of bisimidazolium salts,the greater the absolute values of the interaction energy,the less the adsorbed bisimidazolium salts,while the more hydrophobic of organo-Vt.This work aimed at revealing the adsorption behavior,mechanism as well as effect of bis-imidazolium salts on wettability alteration of negatively charged mineral surface,providing some information for the selection of flooding agent for enhanced oil recovery and wettability modifier.
基金supported by grants from the National Natural Science Fundation of China(81100848)the Natural Science Fundation of Zhejiang Province(LY14H090007)+1 种基金the Zhejiang Health Bureau Fund(2014KYA126)the Population and Family Planning Fund of Zhejiang Province(2014kyb335)
文摘Background:Wilson's disease(WD)is an autosomal recessive genetic disorder of copper metabolism,caused by mutations in the ATP7B gene,resulting in copper accumulation in the liver,brain,kidney,and cornea and leading to significant disability or death if untreated.Early diagnosis and proper therapy usually predict a good prognosis,especially in pre-symptomatic WD.Genetic testing is the most accurate and effective diagnostic method for early diagnosis.Methods:The clinical and biochemical features of three unrelated Han Chinese families with pre-symptomatic WD were reported.The molecular defects in these families were investigated by polymerase chain reaction and DNA sequencing.Hundred healthy children with the same ethnic background served as controls.Bioinformatic tools(polymorphism phenotyping-2,sorting intolerant from tolerant,protein analysis through evolutionary relationships,and predictor of human deleterious single nucleotide polymorphisms)were combined and used to predict the functional effects of mutations.Results:We identified 2 novel ATP7B mutations(p.Leu692Pro and p.Asn728Ser)and 3 known mutations(p.Met769fs,p.Arg778Leu and p.Vall216Met)in these Chinese WD families.These mutations were not observed in the 100 normal controls.The bioinformatic method showed that p.Leu692Pro and p.Asn728Ser mutations are pathogenic.Conclusions:Our research enriches the mutation spectrum of the ATP7B gene worldwide and provides valuable information for studying the mutation types and mode of inheritance of ATP7B in the Chinese population.Liver function analysis and genetic testing in young children with WD are necessary to shorten the time to the initiation of therapy,reduce damage to the liver and brain,and improve prognosis.
