1.Comparison of Efficacy and Mechanism in Warming Yang and Dispersing Cold of Aconiti Radix Lateralis Praeparata Processed by ZHANG Zhongjing's Method and Pharmacopoeia Method
Mingjie JIAO ; Qian CHEN ; Shuyu YAN ; Yiyan SONG ; Jia ZHANG ; Fei LI
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):207-217
ObjectiveTo investigate the therapeutic effects and mechanism of decoctions from four kinds of processed products of Aconiti Radix Lateralis Praeparata(ARLP) in deficiency-cold syndrome. MethodsA total of 36 SD rats were randomly divided into the control group, model group, Shengfupian(SFP) group, Paofuzi(PFZ) group, Heishunpian(HSP) group and Paofupian(PFP) group with 6 rats in each group. Except for the control group, rats in other groups were administered hydrocortisone sodium succinate via intramuscular injection to induce a cold deficiency syndrome model. After 14 consecutive days, each ARLP decoction pieces was administered via continuous gastric lavage at a dose of 12 g·kg-1·d-1 for 7 d, while the control and model groups received an equivalent volume of physiological saline. After the end of administration, body weight, spleen weight and thymus weight were measured for calculating the spleen and thymus indexes. Hematoxylin-eosin(HE) staining was used to observe the pathological morphology of adrenal tissue. The fully automatic biochemistry analyzer was used to measure the total cholesterol(TC), triglyceride(TG), lactic dehydrogenase(LDH) and lactate(LAC) levels in serum. Enzyme-linked immunosorbent assay(ELISA) was employed to measure the contents of 17-hydroxycorticosteroid(17-OHCS), cortisol(CORT), triiodothyronine(T3), thyroxine(T4), thyrotropin(TSH), immunoglobulin(Ig) M, IgG, cyclic adenosine monophosphate(cAMP) and cyclic guanosine monophosphate(cGMP). Western blot was used to measure the protein expression levels of protein kinase A(PKA), cAMP response element-binding protein(CREB), silent information regulator 1(Sirt1) and peroxisome proliferator-activated receptor γ coactivator-1α(PGC-1α). And high performance liquid chromatography(HPLC) was used to determine the content of major alkaloids, followed by Pearson correlation analysis with pharmacodynamic indicators. ResultsAfter modeling, compare with the control group, the model rats exhibited symptoms such as lethargy and loose stools, mild abnormalities were observed in adrenal tissue structure, and both spleen and thymus indices were significantly reduced(P<0.01). Thyroid, adrenal and immune system functions were suppressed, with decreased serum cAMP level and significantly elevated cGMP level(P<0.01). Compared with the model group, the adrenal injury by hydrocortisone sodium succinate were repaired and the spleen index were increased significantly in all four ARLP groups(P<0.05, P<0.01). The thymus index in SFP and PFZ groups were increased significantly(P<0.05). The contents of T3, TSH, 17-OHCS and CORT were increased significantly in SFP and PFZ groups(P<0.05). In addition, the content of IgG in SFP, PFZ and PFP groups were increased significantly(P<0.01), while the content of IgM in PFZ and HSP groups were also increased significantly(P<0.05). Regarding the cyclic nucleotide system, PFZ significantly elevated cAMP level while reducing cGMP level(P<0.05), exhibiting the most pronounced effect among the four decoction pieces. For energy metabolism indicators, PFZ significantly improved abnormal markers including TC, TG, LDH, and LAC(P<0.05). HSP showed marked improvement effects on TG, LDH, and LAC(P<0.05). Both PFZ and SFP significantly elevated the expression levels of PKA, CREB, Sirt1, and PGC-1α proteins(P<0.01). Additionally, the diester alkaloids in ARLP showed a strong positive correlation with TG, IgG, and CORT, a strong negative correlation with LAC, a moderate positive correlation with T4, and moderate negative correlations with cAMP and spleen index. Monomeric alkaloids showed strong positive correlations with TG and IgG, strong negative correlations with LAC, moderate positive correlations with CORT and T4, and moderate negative correlations with cAMP and spleen index. However, the content of water-soluble alkaloids showed strong positive correlations with TC, LDH, 17-OHCS, T3, TSH, and thymus index, moderate positive correlations with cAMP, CORT, T4, and spleen index, and moderate negative correlation with cGMP. ConclusionAmong different processed ARLP decoction pieces, PFZ processed according to ZHANG Zhongjing's method exhibits the most potent warming and cold-dispelling effects. Its pharmacological actions are mediated through regulating the thyroid, adrenal, immune, cyclic nucleotide systems, and material-energy metabolism pathways. Among these, water-soluble alkaloids show strong or moderate correlations with more indicators of deficiency-cold syndrome and exhibit the highest content in PFZ. Therefore, PFZ processed according to ZHANG Zhongjing's method may exert its warming and cold-dispelling effects through water-soluble alkaloids.
2.Clinical characteristics and outcomes of elderly patients with stage Ⅰ diffuse large B-cell lymphoma: a study by the Jiangsu Cooperative Lymphoma Group (JCLG)
Yi XIA ; Jing HE ; Weiying GU ; Tao JIA ; Tingxun LU ; Yongle LI ; Jiahao ZHOU ; Bingzong LI ; Haiying HUA ; Ping LIU ; Yuqing MIAO ; Yuexin CHENG ; Xiaoyan XIE ; Yunping ZHANG ; Wenzhong WU ; Zhuxia JIA ; Xuzhang LU ; Chunling WANG ; Liang YU ; Min XU ; Jinning SHI ; Weifeng CHEN ; Wanchuan ZHUANG ; Zhen QIAN ; Jun QIAN ; Haiwen NI ; Yifei CHEN ; Qiudan SHEN ; Jianyong LI ; Wenyu SHI
Chinese Journal of Internal Medicine 2025;64(6):504-513
Objective:To summarize the clinical characteristics of elderly patients with stage Ⅰ diffuse large B-cell lymphoma (DLBCL) and analyze the factors associated with prognosis.Methods:A case series study was conducted by retrospectively collecting clinical data from patients aged over 60 years with newly diagnosed stage Ⅰ DLBCL across 20 medical centers in Jiangsu Province, China, between June 2010 and April 2023. The involved site, classification and treatment plan were summarized. The primary endpoints were progression-free survival (PFS) and overall survival (OS). Statistical analyses were performed using the Kaplan-Meier method, and Cox regression model.Results:The study included 255 patients with a median age of 69 years, of whom 130 (51.0%) were male, 66 (25.9%) were aged ≥75 years and 26 (10.1%) had a high Charlson Comorbidity Index (CCI) score of ≥2. Extranodal involvement was observed in 163 (63.9%) patients, with the stomach (37.4%, 61/163), intestine (19.0%, 31/163), testes (11.0%, 18/163), and breast (7.4%, 12/163) being the most frequently affected sites. The non-germinal center B-cell (non-GCB) subtype was prevalent in 63.7% of patients (142/223), with no significant difference between the nodal and extranodal groups ( P=0.681). Furthermore, 73.9% (184/249) and 11.7% (29/249) of patients received the R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) and R-miniCHOP regimen, respectively. The overall 3-year PFS rate was 81.5%, and the 3-year OS rate was 85.6%. Patients aged ≥75 years ( HR=2.910, 95% CI 1.565-5.408, P=0.001) and/or with a CCI score ≥2 ( HR=2.324, 95% CI 1.141-4.732, P=0.020) had a significantly poorer PFS. Incorporating age ≥75 years and CCI score ≥2 into the stage-modified international prognostic index (sm-IPI) can better stratify the prognosis of elderly patients with stage Ⅰ DLBCL. The 3-year PFS rate was 48.7% in the high-risk group versus 85.7% in the low-risk group ( P<0.001). Conclusions:Our findings show that the elderly patients with stage Ⅰ DLBCL were predominantly characterized by extranodal involvement (particularly in the stomach and intestinal tract) and non-GCB subtype. Age ≥75 years and CCI ≥2 were identified as independent prognostic factors. The newly established sm-IPI-75-CCI incorporating these factors demonstrated superior prognostic discrimination compared to conventional risk assessment systems.
3.Clinical features of ulcerative colitis in patients with small intestinal bacterial overgrowth
Linru CHEN ; Chenyang LI ; Dong WANG ; Qian LIU ; Xiaonan LIANG ; Yue YAO ; Yuxin LUO ; Jia SONG ; Qian LI ; Xiaolan ZHANG
Chinese Journal of Internal Medicine 2025;64(8):753-758
Objective:To explore the relationship between intestinal bacterial overgrowth (SIBO) and ulcerative colitis (UC).Methods:From December 2023 to June 2024, 85 patients with UC from the Gastroenterology Department of the Luquan branch of the Second Hospital of Hebei Medical University were enrolled. The lactulose hydrogen-methane breath test was performed to assess the prevalence of SIBO. Clinical data, including basic information, clinical manifestations, endoscopic manifestations, inflammatory indicators, current medication regimen, and past medical history, were collected. Furthermore, the body mass index (BMI), modified Mayo score, and patient-reported outcome (PRO2) score were calculated to evaluate disease activity in each patient. The Student′s t-test, Chi-square test, non-parametric test, and multiple logistic regression were used to analyze the data and explore the relationship between SIBO and UC. Results:The incidence of abdominal pain and bloating in patients who were SIBO positive with UC was higher than in those who were SIBO negative [abdominal pain: 50.0%(10/20) vs. 23.1%(15/65), χ2=5.34, P=0.021; abdominal distension: 40.0% (8/20) vs. 13.8% (9/65), χ2=5.01, P=0.025]; the difference was statistically significant ( P<0.05). Patients who were SIBO positive with UC were more likely to develop hypoproteinemia and anemia than those who were SIBO negative [hypoproteinemia: 50.0% (10/20) vs. 15.4% (10/65), χ2=8.35, P=0.004; anemia: 35.0% (7/20) vs. 9.2% (6/65), χ2=5.98, P=0.014]; the difference was statistically significant ( P<0.05). In the intestinal methanogen overgrowth (IMO) positive group, the number of patients with UC with 1-2 stool times/day was higher, and the distribution of stool times between the IMO positive and IMO negative groups was significantly different ( χ2=6.45, P=0.040). Furthermore, combined hypoproteinemia and anemia were risk factors for SIBO in patients with UC (hypoproteinemia OR=4.331, 95% CI 1.117-16.799, P=0.034; anemia OR=5.515, 95% CI 1.231-24.700, P=0.026). Conclusions:We observed a clinical overlap between SIBO and UC. SIBO could be targeted to optimize the treatment of patients with UC in the future.
4.Performance analysis of the double-check standard process for ultrasound reports in health examinations
Zhuqing JIA ; Jingfeng CHEN ; Qian QIN ; Suying DING
Chinese Journal of Health Management 2025;19(6):452-456
Objective:To explore the application effect of double-check standard process for ultrasound reports in health examinations.Method:A historical control study design was used in this study. A total of 11 909 health examination ultrasound reports from the Health Center of the First Affiliated Hospital of Zhengzhou University from February to April in 2021 were selected by systematic sampling method, the double-check standard process was adopted in those reports. The existing problems were categorized, organized and analyzed, and relevant measures for continuous quality improvement were formulated. Then, 13 939 and 15 833 health examination ultrasound reports from February to April in 2022 and 2023 respectively were selected for effect analysis.Results:Compared with those in February to April in 2021, the overall (double-check), initial check and secondary check ultrasound report accuracy rates in February to April in 2023 increased by 5.73%, 3.07% and 1.99%, respectively ( χ2=132.58, 46.80, 127.44, all P<0.001). In terms of trend changes, from February to April 2021 to February to April 2023, the error rates of the following five issues all showed a declining trend: misspellings, inconsistencies between descriptions and conclusion, need for doctor′s signature on the report, missing images, and errors in thyroid/breast color Doppler grading ( χ2=98.93, 30.13/14.59, 3.98, 14.6, all P<0.05). The error rate of ultrasound reports after continuous quality improvement was significantly lower than before. Conclusion:The double-check standard process for ultrasound reports in health examinations can effectively improve the quality of health examination ultrasound reports.
5.Relationship between CIS and outcome after endovascular stent implantation in patients with middle cerebral artery M1 segment stenosis
Xiuxiao CHEN ; Chao NIU ; Qian JIA ; Bogang ZHANG ; Zhongjun DONG ; Xige YAN
Chinese Journal of Geriatric Heart Brain and Vessel Diseases 2025;27(10):1359-1362
Objective To analyze the relationship of capillary index score(CIS)with postoperative outcome in the patients with middle cerebral artery(MCA)M1 segment stenosis after endovascu-lar stent implantation.Methods A total of 122 eligible patients in our hospital from April 2021 to April 2023 were retrospectively recruited,and according to postoperative status,they were classi-fied into a good prognosis group(89 cases)and a poor prognosis group(33 cases).The clinical data were collected,and the preoperative and postoperative CIS values were evaluated.Spearman correlation analysis was applied to analyze the correlation of CIS with prognosis of the patients.ROC curve was plotted to evaluate the value of CIS in predicting postoperative prognosis,and multivariate logistic regression analysis was utilized to analyze the factors affecting the postopera-tive prognosis.Results The poor prognosis group exhibited significantly lower CIS,and larger proportions of aged ≥75 years,diabetes and history of stroke than the good prognosis group(P<0.05,P<0.01).Spearman correlation analysis found that CIS was positively correlated with prog-nosis after endovascular stent implantation in the patients with MCA M1 segment stenosis(r=0.446,P=0.000).ROC curve analysis revealed that the AUC,cut-off value,sensitivity and speci-ficity of CIS in predicting the postoperative outcomes in these patients was 0.790(95%CI:0.706-0.858),2.17,84.85%and 66.29%,respectively(P<0.05).Multivariate logistic analysis suggested that age ≥75 years,history of stroke,and concurrent diabetes were high risk factors for poor prognosis in the patients after endovascular stent implantation(P<0.05,P<0.01),and CIS was a protective factor(OR=0.439,95%CI:0.294-0.655,P=0.000).Conclusion CIS is closely correlated with the prognosis of patients with MCA M1 segment stenosis after endovascular stent implantation.Early evaluation of CIS can provide certain predictive value for postoperative out-comes of these patients.
6.Clinical characteristics and outcomes of elderly patients with stage Ⅰ diffuse large B-cell lymphoma: a study by the Jiangsu Cooperative Lymphoma Group (JCLG)
Yi XIA ; Jing HE ; Weiying GU ; Tao JIA ; Tingxun LU ; Yongle LI ; Jiahao ZHOU ; Bingzong LI ; Haiying HUA ; Ping LIU ; Yuqing MIAO ; Yuexin CHENG ; Xiaoyan XIE ; Yunping ZHANG ; Wenzhong WU ; Zhuxia JIA ; Xuzhang LU ; Chunling WANG ; Liang YU ; Min XU ; Jinning SHI ; Weifeng CHEN ; Wanchuan ZHUANG ; Zhen QIAN ; Jun QIAN ; Haiwen NI ; Yifei CHEN ; Qiudan SHEN ; Jianyong LI ; Wenyu SHI
Chinese Journal of Internal Medicine 2025;64(6):504-513
Objective:To summarize the clinical characteristics of elderly patients with stage Ⅰ diffuse large B-cell lymphoma (DLBCL) and analyze the factors associated with prognosis.Methods:A case series study was conducted by retrospectively collecting clinical data from patients aged over 60 years with newly diagnosed stage Ⅰ DLBCL across 20 medical centers in Jiangsu Province, China, between June 2010 and April 2023. The involved site, classification and treatment plan were summarized. The primary endpoints were progression-free survival (PFS) and overall survival (OS). Statistical analyses were performed using the Kaplan-Meier method, and Cox regression model.Results:The study included 255 patients with a median age of 69 years, of whom 130 (51.0%) were male, 66 (25.9%) were aged ≥75 years and 26 (10.1%) had a high Charlson Comorbidity Index (CCI) score of ≥2. Extranodal involvement was observed in 163 (63.9%) patients, with the stomach (37.4%, 61/163), intestine (19.0%, 31/163), testes (11.0%, 18/163), and breast (7.4%, 12/163) being the most frequently affected sites. The non-germinal center B-cell (non-GCB) subtype was prevalent in 63.7% of patients (142/223), with no significant difference between the nodal and extranodal groups ( P=0.681). Furthermore, 73.9% (184/249) and 11.7% (29/249) of patients received the R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone) and R-miniCHOP regimen, respectively. The overall 3-year PFS rate was 81.5%, and the 3-year OS rate was 85.6%. Patients aged ≥75 years ( HR=2.910, 95% CI 1.565-5.408, P=0.001) and/or with a CCI score ≥2 ( HR=2.324, 95% CI 1.141-4.732, P=0.020) had a significantly poorer PFS. Incorporating age ≥75 years and CCI score ≥2 into the stage-modified international prognostic index (sm-IPI) can better stratify the prognosis of elderly patients with stage Ⅰ DLBCL. The 3-year PFS rate was 48.7% in the high-risk group versus 85.7% in the low-risk group ( P<0.001). Conclusions:Our findings show that the elderly patients with stage Ⅰ DLBCL were predominantly characterized by extranodal involvement (particularly in the stomach and intestinal tract) and non-GCB subtype. Age ≥75 years and CCI ≥2 were identified as independent prognostic factors. The newly established sm-IPI-75-CCI incorporating these factors demonstrated superior prognostic discrimination compared to conventional risk assessment systems.
7.Clinical features of ulcerative colitis in patients with small intestinal bacterial overgrowth
Linru CHEN ; Chenyang LI ; Dong WANG ; Qian LIU ; Xiaonan LIANG ; Yue YAO ; Yuxin LUO ; Jia SONG ; Qian LI ; Xiaolan ZHANG
Chinese Journal of Internal Medicine 2025;64(8):753-758
Objective:To explore the relationship between intestinal bacterial overgrowth (SIBO) and ulcerative colitis (UC).Methods:From December 2023 to June 2024, 85 patients with UC from the Gastroenterology Department of the Luquan branch of the Second Hospital of Hebei Medical University were enrolled. The lactulose hydrogen-methane breath test was performed to assess the prevalence of SIBO. Clinical data, including basic information, clinical manifestations, endoscopic manifestations, inflammatory indicators, current medication regimen, and past medical history, were collected. Furthermore, the body mass index (BMI), modified Mayo score, and patient-reported outcome (PRO2) score were calculated to evaluate disease activity in each patient. The Student′s t-test, Chi-square test, non-parametric test, and multiple logistic regression were used to analyze the data and explore the relationship between SIBO and UC. Results:The incidence of abdominal pain and bloating in patients who were SIBO positive with UC was higher than in those who were SIBO negative [abdominal pain: 50.0%(10/20) vs. 23.1%(15/65), χ2=5.34, P=0.021; abdominal distension: 40.0% (8/20) vs. 13.8% (9/65), χ2=5.01, P=0.025]; the difference was statistically significant ( P<0.05). Patients who were SIBO positive with UC were more likely to develop hypoproteinemia and anemia than those who were SIBO negative [hypoproteinemia: 50.0% (10/20) vs. 15.4% (10/65), χ2=8.35, P=0.004; anemia: 35.0% (7/20) vs. 9.2% (6/65), χ2=5.98, P=0.014]; the difference was statistically significant ( P<0.05). In the intestinal methanogen overgrowth (IMO) positive group, the number of patients with UC with 1-2 stool times/day was higher, and the distribution of stool times between the IMO positive and IMO negative groups was significantly different ( χ2=6.45, P=0.040). Furthermore, combined hypoproteinemia and anemia were risk factors for SIBO in patients with UC (hypoproteinemia OR=4.331, 95% CI 1.117-16.799, P=0.034; anemia OR=5.515, 95% CI 1.231-24.700, P=0.026). Conclusions:We observed a clinical overlap between SIBO and UC. SIBO could be targeted to optimize the treatment of patients with UC in the future.
8.Trends of Gastric Cancer Mortality and Age-Period-Cohort Among Residents in Wuxi City of Jiangsu Province from 2009 to 2023
Tianhong HAN ; Jia LIU ; Hai CHEN ; Qian SHEN ; Nanqian WANG ; Yun QIAN ; Lu WANG
China Cancer 2025;34(7):530-538
[Purpose]To analyze the trends of mortality and disease burden of gastric cancer among residents aged 30 and above from 2009 to 2023 in Wuxi City of Jiangsu Province and to estimate the age-period-cohort effect.[Methods]The gastric cancer mortality data from 2009 to 2023 were collected from Wuxi Death Registration System,and the crude mortality rate,age-standardized mortality rate,years of life lost(YLL)and YLL rate were calculated.The average annual percen-tage change(AAPC)was calculated with Joinpoint regression to analyze the trends of mortality and YLL rate of gastric cancer.The age-period-cohort model was used to analyze the effect of age,pe-riod and birth cohort on gastric cancer mortality.[Results]From 2009 to 2023,there were 32 348 gastric cancer deaths in Wuxi,the crude mortality rate was 44.24/105,and the age-standard mor-tality rate was 25.10/105,with a total YLL of 681 618.33 person-years.The crude mortality rate,age-standardized mortality rate and YLL rate showed decreasing trends,with AAPC of-1.77%(95%CI:-2.10%~-1.43%),-4.59%(95%CI:-4.97%~-4.20%)and-2.14%(95%CI:-2.56%~-1.74%),respectively.From 2009 to 2023,crude mortality rate,age-tandardized mortality rate,YLL in men were higher than those in women,and the decline rates of all indicators in women were faster than those in men.The age effect showed that the overall risk of gastric cancer death increased with age;the period effect showed a gradual decrease in the mortality risk and death burden of gastric cancer over time;the cohort effect showed that the later born cohort had a lower risk of death and death burden.[Conclusion]From 2009 to 2023,the disease burden of gastric cancer mortality in Wuxi showed a decreasing trend,with age and sex being the primary influencing factors.In the future,emphasis should be placed on gastric cancer screening and early intervention in middle-aged and elderly men.
9.Standardized scheme for deploying and withdrawing surgical module of new-type tent hospital system
Zeng-biao SU ; Bin-hong PEI ; Er-xiang XU ; Hai-ying CHEN ; Jia-na CHEN ; Jin-shen PAN ; Yi-feng HUANG ; Qian XU
Chinese Medical Equipment Journal 2025;46(2):74-79
Objective To explore the scheme for the deployment and withdrawal of the surgical module of the new-type tent hospital system.Methods A set of standardized scheme for deploying and withdrawing the surgical module of the new-type tent hosital system was proposed and implemented in terms of labor division,operation precedure,operation technique and precaution.The operating time,number of operational errors and number of equipment damages were recorded for each of the five deployment and withdrawal operations before and after the program was executed,and the team members'immediate heart rate,percentage of maximum heart rate(MHR)and rating of perceived exercise(RPE)at the end of the operation were recorded after the program was implemented.SPSS 26.0 software was used for statistical analysis.Results The standardized scheme had the deployment time shortened from(85.15±11.430)min to(58.23±8.513)min,withdrawal time decreased from(65.36±9.369)min to(48.92±7.129)min,with the differences being statistically significant(P<0.05);the numbers of operatio-nal errors and equipment damages were both reduced when compared with those before the implementation of the schemce;the immediate heart rate of the team members at the end of the operation ranged from 43 to 157 beats/min,with an average value of 151.1 beats/min,the individual MHR percentages were from 75%to 87%,with an average value of 81.1%,and the RPE scores were from 14 to 17,with an average value of 15.3,which all could be categorized as moderate-operation intensity.Condusion The standardized deployment and withdrawal scheme for the surgical module meets the needs of actual combat and training assessment,and thus is worthy promoting in medical institutions equipped with the surgical module of the new-type tent hosital system.[Chinese Medical Equipment Journal,2025,46(2):74-79]
10.Establishment of a LC-MS/MS method for detecting gamma-aminobutyric acid in plasma and its clinical application
Jia-qian QIN ; Lei CAO ; Ying-fei PENG ; Fang-jun CHEN ; Bai-shen PAN ; Bei-li WANG ; Wei GUO
Fudan University Journal of Medical Sciences 2025;52(5):708-716
Objective To establish a stable liquid chromatography-tandem mass spectrometry(LC-MS/MS)method for detecting gamma-aminobutyric acid(GABA)in plasma,and to evaluate the value of GABA detection in the diagnosis of sleep disorders.Methods GABA was detected using a UPLC Xevo TQs system.The method was pre-validated and its performance was verified to establish a reference range for healthy individuals.The difference in plasma GABA levels between apparently healthy individuals and patients with sleep disorders was compared.Results We employed deuterated compounds as isotopic internal standards and utilized an Amide chromatographic column for separation.The mobile phase was 0.050%formic acid in water and 90%acetonitrile in water containing 0.175%formic acid and 5 mmol/L ammonium acetate with gradient elution in the column temperature of 35℃.The linear range for the detection of GABA by LC-MS/MS was 0.05-10.00 μmol/L,with a lower limit of quantification of 0.02 μmol/L,the inter-day CV<3.00%and intra assay CV<4.00%,respectively,and the recovery rate was 101.06%-109.02%.The reference ranges for plasma GABA were established by analyzing 300 healthy controls stratified by age:18-34 years(0.08-0.15 μmol/L),35-49 years(0.10-0.20 μmol/L),and≥50 years(0.12-0.23 μmol/L).Then plasma GABA was used as a biomarker for auxiliary diagnosis of sleep disorders in analyzing 221 patients and 300 healthy controls,which revealed that AUC values were 0.510(P=0.850),0.686(P=0.002),and 0.890(P<0.001)in the groups of 18-34 years,35-49 years,and≥50 years,respectively,with optimal cut-off values of 0.09,0.10 and 0.11 μmol/L.Conclusion A reliable LC-MS/MS method for detecting GABA has been established,which can detect plasma GABA levels sensitively and accurately and can be used in assisting the clinical diagnosis of sleep disorders.

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