AIM:To investigate the role of FAT10 and mutant p53 in the pathogenesis,severity and prognosis of gastric cancer.METHODS:FAT10,mutant p53 mRNA and protein levels were measured by reverse transcription(RT)-PCR and immu...AIM:To investigate the role of FAT10 and mutant p53 in the pathogenesis,severity and prognosis of gastric cancer.METHODS:FAT10,mutant p53 mRNA and protein levels were measured by reverse transcription(RT)-PCR and immunohistochemistry in gastric cancer tissue(n = 62),tumoradjacent tissue(n = 62) and normal gastric tissue(n = 62).Relation of FAT10 and mutant p53 expression with clinicopathological features and clinical outcomes of gastric cancer patients were analyzed.RESULTS:The FAT10,mutant p53 mRNA and protein levels were signif icantly higher in gastric cancer than in its adjacent and normal tissue.The FAT10 and mutant p53 levels in gastric cancer tissue were significantly correlated with lymph node metastasis and tumor,nodes,metastasis(TNM) staging.Moreover,the high FAT10 level was associated with the overall survival rate of patients.Multivariate Cox-proportional hazards model analysis showed that mRNA and protein levels of FAT10 and mutant p53,lymph node metastasis,distant metastasis and TNM stage were the independent prognostic factors for gastric cancer.CONCLUSION:FAT10 may be involved in gastric carcinogenesis,and is a potential marker for the prognosis of gastric cancer patients.FAT10 and mutant p53 may play a common role in the carcinogenesis of gastric cancer.展开更多
AIM: To construct the plasmid pcHEV23 containing fragments of HEV ORF2 and ORF3 chimeric gene and to assess its ability to elicit specific immunologic response in mice.METHODS: The gene encoding the structural protein...AIM: To construct the plasmid pcHEV23 containing fragments of HEV ORF2 and ORF3 chimeric gene and to assess its ability to elicit specific immunologic response in mice.METHODS: The gene encoding the structural protein of HEV ORF2 fragment and full-length ORF3 was amplified by PCR. The PCR products were cloned into an eucaryotic expression plasmid pcDNA3. The resulting plasmid pcHEV23 was used as a DNA vaccine to inoculate BALB/c mice intramuscularly thrice at a dose of 100 or 200 μg.Mice injected with empty pcDNA3 DNA or saline served as control and then specific immune responses in the mice were detected.RESULTS: After 2-3 times of inoculation, all mice injected with pcHEV23 had anti-HEV IgG seroconversion and specific T lymphocyte proliferation. The lymphocyte stimulation index in the group immunized with pcHEV23(3.1±0.49) was higher than that in the control group (0.787±0.12, P<0.01). None in the control group had a detectable level of anti-HEV IgG.CONCLUSION: DNA vaccine containing HEV ORF2 and ORF3 chimeric gene can successfully induce specific humoral and cellular immune response in mice.展开更多
Ammonia induces astrocyte swelling, which is strongly associated with overexpression of aquaporin-4. However, the mechanisms by which ammonia induces astrocyte swelling, and subsequently upregulating aquaporin-4 expre...Ammonia induces astrocyte swelling, which is strongly associated with overexpression of aquaporin-4. However, the mechanisms by which ammonia induces astrocyte swelling, and subsequently upregulating aquaporin-4 expression, remain unknown. In the present study, astrocytes were cultured in vitro and exposed to ammonium chloride (NH4CI), followed by propofol protein kinase C agonist, or antagonist, respectively. Astrocyte morphology was observed by light microscopy, and aquaporin-4 expression was detected by western blot analysis. Results showed that propofol or protein kinase C agonist significantly attenuated the degree of NH4CI-induced astrocyte swelling and inhibited increased aquaporin-4 expression. Propofol treatment inhibited aquaporin-4 overexpression in cultured astrocyte induced by NH4CI; protein kinase C pathway activation is potentially involved.展开更多
Objective: This work aimed to study the safety and efficacy of preoperative intestinal stent decompression combined with laparoscopic surgery to treat left-sided colorectal cancer with obstruction (LCCO). Methods: Ret...Objective: This work aimed to study the safety and efficacy of preoperative intestinal stent decompression combined with laparoscopic surgery to treat left-sided colorectal cancer with obstruction (LCCO). Methods: Retrospective analysis was conducted on data obtained from 21 LCCO patients admitted to The First Affiliated Hospital of Zhejiang Chinese Medicine University during March 2008 and December 2011. To remove the intestinal obstruction, preoperative intestinal stent placement under colonoscopic guidance was performed. Approximately 7 to 10 days after the operation, laparoscopic radical surgery of colorectal cancer was conducted. Results: Among the 21 cases studied, laparoscopic surgery was successful in 20 patients. Emergent laparotomy was conducted in one patient because of tumor invasion in the ureter. The duration of the operation ranged from 180 to 320 min, and the average time was 220 min. The recovery time for bowel function ranged from 2 to 5 days with an average time of 3 days. Postoperative infection of the incision occurred in one case. No anastomotic leakage was observed in any of the cases. Conclusion: Preoperative intestinal stent decompression, combined with primary stage laparoscopic surgery, is a safe and effective method for the treatment of LCCO.展开更多
The effect of sterilization methods on biological activity of fibronectin on the surface of biomaterials was elaborated in the present study. Sterile protein- modified biomaterials were fabricated by microfilter filtr...The effect of sterilization methods on biological activity of fibronectin on the surface of biomaterials was elaborated in the present study. Sterile protein- modified biomaterials were fabricated by microfilter filtration and UV irradiation, respectively. UV irradiation altered the conformation of surface- adsorbed fibronectin and further affected the attachment, morphology and biological function of endothelial cells. However, microfUter filtration did not to change the normal conformation of fibronectin, or the proliferation and biological function of endothelial cells, indicating that microfilter filtration sterilization is the most suitable method for protein-substrate.展开更多
“Subarachnoid Hemorrhage is non-traumatic nasty bleeding into the subarachnoid area, the territory between the arachnoid and the piamater of the central nervous system showing prompt developing signs of neurological ...“Subarachnoid Hemorrhage is non-traumatic nasty bleeding into the subarachnoid area, the territory between the arachnoid and the piamater of the central nervous system showing prompt developing signs of neurological sequelae”. It is one among the neurological emergencies which is a very distressing cerebrovascular disease with complicated mechanisms that risks brain perfusion and its function, having higher morbidity and mortality rates. Its mortality rate is still ranged between 8.3% and 66.7%, with noticeable regional variations, beside recent advances in treatment approaches. The incidence of SAH among the population of 2 - 22.5/100,000 was reported with a minimum of 60% of aneurysm ruptures occurring amid ages of 40 and 60 years with 3:2 male:female ratio. The rupture risks for unruptured aneurysms are increased by the issues like present smokers, larger size of aneurysm, and amid young population. The surgical treatment decision should be contemplated upon factors such as aneurysm’s size, aneurysm’s location, patient’s illness history, and surgeon’s operative experiences. Latest technical progresses in imaging techniques, increased consideration of illness history, more awareness of incidences of aneurysms and use of micro neurosurgery, have raised the chance for detection of subarachnoid hemorrhage (SAH) and possible better outcomes with surgical management. Factors that may affect outcome include age, size and site of aneurysm, interval between ictus and surgery, CT Fisher Grade & Hunt and Hess Grading earlier to surgery, & Glasgow Coma Scale at the while of discharge. The studies here support the wide spread concept that surgical clipping of SAH for Hunt and Hess Grade 4, 5 SAH, which is also considered as poor Grade SAH stipulates an effective treatment if done earlier provides better outcome.展开更多
Background:Tumors possess incessant growth features,and expansion of their masses demands sufficient oxygen supply by red blood cells(RBCs).In adult mammals,the bone marrow(BM)is the main organ regulating hematopoiesi...Background:Tumors possess incessant growth features,and expansion of their masses demands sufficient oxygen supply by red blood cells(RBCs).In adult mammals,the bone marrow(BM)is the main organ regulating hematopoiesis with dedicated manners.Other than BM,extramedullary hematopoiesis is discovered in various pathophysiological settings.However,whether tumors can contribute to hematopoiesis is completely unknown.Accumulating evidence shows that,in the tumor microenvironment(TME),perivascular localized cells retain progenitor cell properties and can differentiate into other cells.Here,we sought to better understand whether and how perivascular localized pericytes in tumors manipulate hematopoiesis.Methods:To test if vascular cells can differentiate into RBCs,genome-wide expression profiling was performed using mouse-derived pericytes.Genetic tracing of perivascular localized cells employing NG2-CreERT2:R26R-tdTomato mouse strain was used to validate the findings in vivo.Fluorescence-activated cell sorting(FACS),single-cell sequencing,and colony formation assays were applied for biological studies.The production of erythroid differentiationspecific cytokine,erythropoietin(EPO),in TME was checked using quantitative polymerase chain reaction(qPCR),enzyme-linked immunosorbent assay(ELISA,magnetic-activated cell sorting and immunohistochemistry.To investigate BM function in tumor erythropoiesis,BM transplantation mouse models were employed.Results:Genome-wide expression profiling showed that in response to plateletderived growth factor subunit B(PDGF-B),neural/glial antigen 2(NG2)+perivascular localized cells exhibited hematopoietic stem and progenitor-like features and underwent differentiation towards the erythroid lineage.PDGF-B simultaneously targeted cancer-associated fibroblasts to produce high levels of EPO,a crucial hormone that necessitates erythropoiesis.FACS analysis using genetic tracing of NG2+cells in tumors defined the perivascular localized cell-derived subpopulation of hematopoietic cells.Single-cell sequencing and colony formation assays validated the fact that,upon PDGF-B stimulation,NG2+cells isolated from tumors acted as erythroblast progenitor cells,which were distinctive from the canonical BM hematopoietic stem cells.Conclusions:Our data provide a new concept of hematopoiesis within tumor tissues and novel mechanistic insights into perivascular localized cell-derived erythroid cells within TME.Targeting tumor hematopoiesis is a novel therapeutic concept for treating various cancers that may have profound impacts on cancer therapy.展开更多
Background: Patients with Alzheimer's disease (AD) manifest progressive decline in writing abilities. Most studies on agraphia in AD have been performed in the alphabetic system, such as English. However, these fi...Background: Patients with Alzheimer's disease (AD) manifest progressive decline in writing abilities. Most studies on agraphia in AD have been performed in the alphabetic system, such as English. However, these findings may not be applicable to other written language systems. The unique features of the Chinese written script could affect the patterns of agraphia in Chinese AD patients. The aim of this study was to explore the features of writing errors in Chinese patients with AD and amnestie mild cognitive impairment (a-MCI), as well as to study the relationship between their writing errors and neuropsychological functions. Methods: In this study, we performed an observational study in a group of subjects including 17 AD patients, 14 patients with a-MCI, and 16 elderly healthy controls. We analyzed the writing errors in these subjects and also studied the relationship between their writing errors and neuropsychological functions. Results: Our study showed that in patients whose mother tongue is Chinese, writing ability was comparatively well preserved in the MCI phase but significantly impaired when the disease progressed to the stage of AD. The writing errors showed corresponding increase with the severity of cognition decline, both in the types of errors and rate of occurrence. Analysis of the writing errors showed that word substitution and unintelligible words were the most frequent error types that occurred in all the three study groups. The occurrence rate of unintelligible words was significantly higher in the AD group compared with the a-MCI group (P = 0.024) and control group (P = 0.018). In addition, the occurrence rates of word substitution were also significantly higher in AD (P = 0.013) and a-MCI groups (P = 0.037) than that of control group. However, errors such as totally no response, visuospatial impairment, paragraph agraphia, ideograph, and perseverative writing errors were only seen in AD group. Besides, we also found a high occurrence rate of visuoconstructional errors (13.3%) in our AD group. Conclusions: Our study confirmed that agraphia is an important feature in patients with AD. The writing error profile in patients whose native language is Chinese was unique compared to patients using the alphabetic language system.展开更多
基金CAMS Innovation Fund for Medical Sciences(2021‐I2M‐1‐017),the National Natural Science Foundation of China(81970107),State Key Laboratory of Experimental Hematology Research Grant(Z22‐02)和Tianjin“131”Science Fund for Creative Research Groups(2021)基金支持Yihai Cao获得the Swed is h Research Counc i l(2016‐02215,2019‐01502,2020‐06121,2021‐06122),National Key R&D Program of China(2020YFC0846600)+6 种基金the Hong Kong Centre for Cerebro‐cardiovascular Health Engineering,the Swedish Cancer Foundation(200734PjF),the Swedish Children's Cancer Foundation(PR2018‐0107)the Strategic Research Areas(SFO)‐Stem Cell and Regenerative Medicine Foundation,the Karolinska Institute Foundation(2020‐02080)the Karolinska Institute distinguished professor award,and the Karolinska Institute Foundation(2020‐02588)基金支持Kayoko Hosaka获得the Karolinska Institute Foundation基金支持Takahiro Seki获得the Scandinavia‐Japan Sasakawa Foundation基金支持Xu Jing获得the National Natural Science Foundation of China(81801163)and Doctor Fund of Shandong Natural Science Foundation(ZR201807060846)基金支持Masahito Yoshihara获得the Japan Society for the Promotion of Science(JSPS)Overseas Research Fellowships基金支持。
文摘AIM:To investigate the role of FAT10 and mutant p53 in the pathogenesis,severity and prognosis of gastric cancer.METHODS:FAT10,mutant p53 mRNA and protein levels were measured by reverse transcription(RT)-PCR and immunohistochemistry in gastric cancer tissue(n = 62),tumoradjacent tissue(n = 62) and normal gastric tissue(n = 62).Relation of FAT10 and mutant p53 expression with clinicopathological features and clinical outcomes of gastric cancer patients were analyzed.RESULTS:The FAT10,mutant p53 mRNA and protein levels were signif icantly higher in gastric cancer than in its adjacent and normal tissue.The FAT10 and mutant p53 levels in gastric cancer tissue were significantly correlated with lymph node metastasis and tumor,nodes,metastasis(TNM) staging.Moreover,the high FAT10 level was associated with the overall survival rate of patients.Multivariate Cox-proportional hazards model analysis showed that mRNA and protein levels of FAT10 and mutant p53,lymph node metastasis,distant metastasis and TNM stage were the independent prognostic factors for gastric cancer.CONCLUSION:FAT10 may be involved in gastric carcinogenesis,and is a potential marker for the prognosis of gastric cancer patients.FAT10 and mutant p53 may play a common role in the carcinogenesis of gastric cancer.
基金Supported by the Grants from the Natural Science Foundation of Zhejiang Province, No. RC01054, Science Technology Department of Zhejiang Province, No. F11023 and Key Project of Health Bureau of Zhejiang Province
文摘AIM: To construct the plasmid pcHEV23 containing fragments of HEV ORF2 and ORF3 chimeric gene and to assess its ability to elicit specific immunologic response in mice.METHODS: The gene encoding the structural protein of HEV ORF2 fragment and full-length ORF3 was amplified by PCR. The PCR products were cloned into an eucaryotic expression plasmid pcDNA3. The resulting plasmid pcHEV23 was used as a DNA vaccine to inoculate BALB/c mice intramuscularly thrice at a dose of 100 or 200 μg.Mice injected with empty pcDNA3 DNA or saline served as control and then specific immune responses in the mice were detected.RESULTS: After 2-3 times of inoculation, all mice injected with pcHEV23 had anti-HEV IgG seroconversion and specific T lymphocyte proliferation. The lymphocyte stimulation index in the group immunized with pcHEV23(3.1±0.49) was higher than that in the control group (0.787±0.12, P<0.01). None in the control group had a detectable level of anti-HEV IgG.CONCLUSION: DNA vaccine containing HEV ORF2 and ORF3 chimeric gene can successfully induce specific humoral and cellular immune response in mice.
基金Supported by a Grant from Zhejiang Provincial Health Department, No. 2007A057
文摘Ammonia induces astrocyte swelling, which is strongly associated with overexpression of aquaporin-4. However, the mechanisms by which ammonia induces astrocyte swelling, and subsequently upregulating aquaporin-4 expression, remain unknown. In the present study, astrocytes were cultured in vitro and exposed to ammonium chloride (NH4CI), followed by propofol protein kinase C agonist, or antagonist, respectively. Astrocyte morphology was observed by light microscopy, and aquaporin-4 expression was detected by western blot analysis. Results showed that propofol or protein kinase C agonist significantly attenuated the degree of NH4CI-induced astrocyte swelling and inhibited increased aquaporin-4 expression. Propofol treatment inhibited aquaporin-4 overexpression in cultured astrocyte induced by NH4CI; protein kinase C pathway activation is potentially involved.
文摘Objective: This work aimed to study the safety and efficacy of preoperative intestinal stent decompression combined with laparoscopic surgery to treat left-sided colorectal cancer with obstruction (LCCO). Methods: Retrospective analysis was conducted on data obtained from 21 LCCO patients admitted to The First Affiliated Hospital of Zhejiang Chinese Medicine University during March 2008 and December 2011. To remove the intestinal obstruction, preoperative intestinal stent placement under colonoscopic guidance was performed. Approximately 7 to 10 days after the operation, laparoscopic radical surgery of colorectal cancer was conducted. Results: Among the 21 cases studied, laparoscopic surgery was successful in 20 patients. Emergent laparotomy was conducted in one patient because of tumor invasion in the ureter. The duration of the operation ranged from 180 to 320 min, and the average time was 220 min. The recovery time for bowel function ranged from 2 to 5 days with an average time of 3 days. Postoperative infection of the incision occurred in one case. No anastomotic leakage was observed in any of the cases. Conclusion: Preoperative intestinal stent decompression, combined with primary stage laparoscopic surgery, is a safe and effective method for the treatment of LCCO.
基金supported by National Natural Science Foundation(Project No.81001034)Zhejiang Medical and Health Science and Technology Program(No.2009B087,No.2011RCB030)
文摘The effect of sterilization methods on biological activity of fibronectin on the surface of biomaterials was elaborated in the present study. Sterile protein- modified biomaterials were fabricated by microfilter filtration and UV irradiation, respectively. UV irradiation altered the conformation of surface- adsorbed fibronectin and further affected the attachment, morphology and biological function of endothelial cells. However, microfUter filtration did not to change the normal conformation of fibronectin, or the proliferation and biological function of endothelial cells, indicating that microfilter filtration sterilization is the most suitable method for protein-substrate.
文摘“Subarachnoid Hemorrhage is non-traumatic nasty bleeding into the subarachnoid area, the territory between the arachnoid and the piamater of the central nervous system showing prompt developing signs of neurological sequelae”. It is one among the neurological emergencies which is a very distressing cerebrovascular disease with complicated mechanisms that risks brain perfusion and its function, having higher morbidity and mortality rates. Its mortality rate is still ranged between 8.3% and 66.7%, with noticeable regional variations, beside recent advances in treatment approaches. The incidence of SAH among the population of 2 - 22.5/100,000 was reported with a minimum of 60% of aneurysm ruptures occurring amid ages of 40 and 60 years with 3:2 male:female ratio. The rupture risks for unruptured aneurysms are increased by the issues like present smokers, larger size of aneurysm, and amid young population. The surgical treatment decision should be contemplated upon factors such as aneurysm’s size, aneurysm’s location, patient’s illness history, and surgeon’s operative experiences. Latest technical progresses in imaging techniques, increased consideration of illness history, more awareness of incidences of aneurysms and use of micro neurosurgery, have raised the chance for detection of subarachnoid hemorrhage (SAH) and possible better outcomes with surgical management. Factors that may affect outcome include age, size and site of aneurysm, interval between ictus and surgery, CT Fisher Grade & Hunt and Hess Grading earlier to surgery, & Glasgow Coma Scale at the while of discharge. The studies here support the wide spread concept that surgical clipping of SAH for Hunt and Hess Grade 4, 5 SAH, which is also considered as poor Grade SAH stipulates an effective treatment if done earlier provides better outcome.
基金CAMS Innovation Fund for Medical Sciences,Grant/Award Number:2021-I2M-1-017National Natural Science Foundation of China,Grant/Award Number:81970107+12 种基金State Key Laboratory of Experimental Hematology Research,Grant/Award Number:Z22-02Tianjin“131”Science Fund for Creative Research Groups,Grant/Award Number:2021Swedish Research Council,Grant/Award Numbers:2016-02215,2019-01502,2020-06121,2021-06122National Key R&D Program of China,Grant/Award Number:2020YFC0846600Hong Kong Centre for Cerebro-cardiovascular Health EngineeringSwedish Cancer Foundation,Grant/Award Number:200734PjFSwedish Children’s Cancer Foundation,Grant/Award Number:PR2018-0107Strategic Research Areas(SFO)-Stem Cell and Regenerative Medicine FoundationKarolinska Institute distinguished professor awardKarolinska Institute FoundationScandinavia-Japan Sasakawa Foundation,Grant/Award Number:81801163Doctor Fund of Shandong Natural Science Foundation,Grant/Award Number:ZR201807060846Japan Society for the Promotion of Science(JSPS)Overseas Research Fellowships。
文摘Background:Tumors possess incessant growth features,and expansion of their masses demands sufficient oxygen supply by red blood cells(RBCs).In adult mammals,the bone marrow(BM)is the main organ regulating hematopoiesis with dedicated manners.Other than BM,extramedullary hematopoiesis is discovered in various pathophysiological settings.However,whether tumors can contribute to hematopoiesis is completely unknown.Accumulating evidence shows that,in the tumor microenvironment(TME),perivascular localized cells retain progenitor cell properties and can differentiate into other cells.Here,we sought to better understand whether and how perivascular localized pericytes in tumors manipulate hematopoiesis.Methods:To test if vascular cells can differentiate into RBCs,genome-wide expression profiling was performed using mouse-derived pericytes.Genetic tracing of perivascular localized cells employing NG2-CreERT2:R26R-tdTomato mouse strain was used to validate the findings in vivo.Fluorescence-activated cell sorting(FACS),single-cell sequencing,and colony formation assays were applied for biological studies.The production of erythroid differentiationspecific cytokine,erythropoietin(EPO),in TME was checked using quantitative polymerase chain reaction(qPCR),enzyme-linked immunosorbent assay(ELISA,magnetic-activated cell sorting and immunohistochemistry.To investigate BM function in tumor erythropoiesis,BM transplantation mouse models were employed.Results:Genome-wide expression profiling showed that in response to plateletderived growth factor subunit B(PDGF-B),neural/glial antigen 2(NG2)+perivascular localized cells exhibited hematopoietic stem and progenitor-like features and underwent differentiation towards the erythroid lineage.PDGF-B simultaneously targeted cancer-associated fibroblasts to produce high levels of EPO,a crucial hormone that necessitates erythropoiesis.FACS analysis using genetic tracing of NG2+cells in tumors defined the perivascular localized cell-derived subpopulation of hematopoietic cells.Single-cell sequencing and colony formation assays validated the fact that,upon PDGF-B stimulation,NG2+cells isolated from tumors acted as erythroblast progenitor cells,which were distinctive from the canonical BM hematopoietic stem cells.Conclusions:Our data provide a new concept of hematopoiesis within tumor tissues and novel mechanistic insights into perivascular localized cell-derived erythroid cells within TME.Targeting tumor hematopoiesis is a novel therapeutic concept for treating various cancers that may have profound impacts on cancer therapy.
基金This study was supported by a grant from the National Natural Science Foundation of China
文摘Background: Patients with Alzheimer's disease (AD) manifest progressive decline in writing abilities. Most studies on agraphia in AD have been performed in the alphabetic system, such as English. However, these findings may not be applicable to other written language systems. The unique features of the Chinese written script could affect the patterns of agraphia in Chinese AD patients. The aim of this study was to explore the features of writing errors in Chinese patients with AD and amnestie mild cognitive impairment (a-MCI), as well as to study the relationship between their writing errors and neuropsychological functions. Methods: In this study, we performed an observational study in a group of subjects including 17 AD patients, 14 patients with a-MCI, and 16 elderly healthy controls. We analyzed the writing errors in these subjects and also studied the relationship between their writing errors and neuropsychological functions. Results: Our study showed that in patients whose mother tongue is Chinese, writing ability was comparatively well preserved in the MCI phase but significantly impaired when the disease progressed to the stage of AD. The writing errors showed corresponding increase with the severity of cognition decline, both in the types of errors and rate of occurrence. Analysis of the writing errors showed that word substitution and unintelligible words were the most frequent error types that occurred in all the three study groups. The occurrence rate of unintelligible words was significantly higher in the AD group compared with the a-MCI group (P = 0.024) and control group (P = 0.018). In addition, the occurrence rates of word substitution were also significantly higher in AD (P = 0.013) and a-MCI groups (P = 0.037) than that of control group. However, errors such as totally no response, visuospatial impairment, paragraph agraphia, ideograph, and perseverative writing errors were only seen in AD group. Besides, we also found a high occurrence rate of visuoconstructional errors (13.3%) in our AD group. Conclusions: Our study confirmed that agraphia is an important feature in patients with AD. The writing error profile in patients whose native language is Chinese was unique compared to patients using the alphabetic language system.