1.Application value of serum carbonic anhydraseⅢas a new biomarker in the clinical diagnosis of Alzheimer disease
Jiaoqi REN ; Jinxiu WANG ; Jiantao WANG ; Yanli ZHANG ; Xuechun WANG ; Jingchun GUO ; Houguang ZHOU
Chinese Journal of Clinical Medicine 2024;31(5):696-704
Objective To explore the application value and related factors of serum carbonic anhydraseⅢ(CAⅢ)in the clinical diagnosis of mild to moderate Alzheimer disease(AD).Methods A total of 106 elderly patients initially diagnosed with mild to moderate AD at Huashan Hospital,Fudan University from October 2020 to November 2022 were enrolled as the AD group,and 89 healthy elderly people during the same period were enrolled as the control group.The serum biochemical indicators including liver and kidney function,blood lipids,blood glucose,folic acid and homocysteine were detected in both groups.Cognitive function was assessed by Mini-mental State Examination(MMSE).Patient Health Questionnaire-9(PHQ-9)and Generalized Anxiety Disorder-7(GAD-7)were used to assess psychological status.The activities of daily living(ADL)were assessed by modified Barthel Index(BI).Serum CAⅢlevels were measured by enzyme-linked immunosorbent assay(ELISA).Correlation analysis and multivariate linear regression analysis were used to identify factors influencing serum CAⅢlevels,and receiver operating characteristic(ROC)curve analysis was performed to evaluate the diagnostic value of serum CAⅢlevels in elderly patients with mild to moderate AD.Results The MMSE score of the AD group was significantly lower than that of the control group(P<0.001),and the PHQ-9 and GAD-7 scores were significantly higher than those of the control group(P<0.001).The serum CAⅢlevel in the AD group was significantly lower than that in the control group(P<0.000 1).In patients with AD,serum CAⅢlevels in patients with a disease course>3 years,accompanied by depression or anxiety,moderate AD,and serum creatinine≤111 μmol/L were significantly lower than those in patients with a disease course≤3 years,normal emotions,mild AD,and serum creatinine>111 μmol/L(P<0.05).Correlation analysis and multivariate linear regression analysis showed that serum CAⅢlevels were negatively correlated with disease duration,PHQ-9 score,GAD-7 scores and severity degree,positively correlated with serum creatinine level(P<0.05).The PHQ-9 score,severity degree,and serum creatinine level were independent related factors for serum CAⅢlevel in mild to moderate AD elderly patients(P<0.05).ROC curve result showed that the area under the curve(AUC)of serum CAⅢin diagnosing mild to moderate AD in elderly patients was 0.946,with sensitivity and specificity of 88.79% and 96.74%,respectively.Conclusions Serum CAⅢlevels in elderly patients with mild to moderate AD are higher than those in healthy individuals.Mild AD,without depressive mood,and elevated serum creatinine levels are related factors for elevated serum CAⅢlevels in elderly AD patients.Serum CAⅢmay serve as a novel biological marker for the diagnosis of mild to moderate AD in the elderly.
2.Function Positioning and Implementation Path of Internal Control in Public Hospitals from the Perspective of Finan-cial and Accounting Supervision
Hua FU ; Xiaozhe DAI ; Daxi ZHENG ; Yi WANG ; Dengjiao DONG ; Liyan WANG ; Changrong ZHOU ; Haifen SUN ; Jinxiu SHI
Chinese Health Economics 2024;43(1):82-85,88
With the reform of the medical and health system entering a critical period,public hospitals have also exposed new risks and challenges in economic operation.As an important means of hospital standardized management,internal control can better prevent and resolve the risk of hospital economic operation and ensure the sustainable operation of the hospital.By interpreting the requirements of current national policies on hospital internal control,it analyzes the functional positioning of financial and accounting supervision in hospital internal control,shares the internal control implementation path of sample hospitals from the perspective of financial and accounting supervision,and puts forward suggestions on strengthening internal control construction of public hospitals in the new era,in order to lay a good foundation for the high-quality development of hospitals.
3.Analysis of risk factors for atrial fibrillation in adult patients with critically severe burns after the first surgery
Nanhong JIANG ; Weiguo XIE ; Deyun WANG ; Zhigang CHU ; Maomao XI ; Jinxiu ZHOU ; Feng LI
Chinese Journal of Burns 2024;40(9):857-865
Objective:To explore the risk factors for atrial fibrillation in adult patients with critically severe burns after the first surgery.Methods:This study was a retrospective case series study. From January 1, 2018 to March 31, 2023, 211 adult patients with critically severe burns were admitted to the Department of Burns of Tongren Hospital of Wuhan University & Wuhan Third Hospital and met the inclusion criteria, including 158 males and 53 females, aged 24-81 years. According to whether atrial fibrillation occurred after the first surgery, the patients were divided into postoperative atrial fibrillation (POAF) group (23 cases) and non-POAF group (188 cases). The following indexes of patients in POAF group were collected, including the onset time, duration, treatment method, and number of patients with more than once of atrial fibrillation after the first surgery. The following data of the two groups of patients were collected, including general data, such as gender, age, burn type, total burn area, full-thickness burn area, inhalation injury, underlying diseases, mechanical ventilation, and sepsis; electrolyte imbalance and blood index level before the first surgery; the first surgery-related information such as surgical length and surgical method; volume changes and vital signs during the first surgery, such as total volume of fluid infusion, total volume of blood transfusion, volume of blood loss, hypotension, and hypothermia; postoperative hypothermia; inflammatory index levels before the first surgery and on the first day after the first surgery, such as procalcitonin levels, white blood cell count, neutrophil count, lymphocyte count, platelet count, neutrophil to lymphocyte ratio (NLR), platelet count to lymphocyte ratio (PLR); mortality within 30 days of admission. The independent risk factors for occurrence of atrial fibrillation in adult patients with critically severe burns after the first surgery were screened.Results:The onset time of atrial fibrillation of patients in POAF group was 2 (2, 4) hours after the first surgery, and the duration of atrial fibrillation was 16 (6, 26) hours. Twenty-one patients were treated with intravenous injection of amiodarone, two patients were treated with cardiac electrical cardioversion, and atrial fibrillation of all patients converted to sinus rhythm after treatment. Three patients experienced atrial fibrillation more than once. The age was 59 (42, 70) years and the total burn area was 90% (70%, 94%) total body surface area (TBSA) in patients in POAF group, which were significantly higher than 48 (38, 56) years and 70% (60%, 83%) TBSA in non-POAF group (with Z values of -2.64 and -3.56, respectively, P<0.05). Compared with those in non-POAF group, the incidence rate of inhalation injury of patients in POAF group was significantly higher ( χ2=4.45, P<0.05), the total volumes of fluid infusion and blood transfusion during the first surgery were significantly increased (with Z values of -3.98 and -3.75, respectively, P<0.05), the incidence rates of hypothermia during the first surgery and hypothermia after the first surgery were significantly increased (with χ2 values of 8.24 and 18.72, respectively, P<0.05), the levels of procalcitonin before the first surgery and on the first day after the first surgery, as well as the NLR on the first day after the first surgery were significantly increased (with Z values of -3.03, -2.19, and -2.18, respectively, P<0.05), the lymphocyte count (with Z values of -2.07 and -2.60, respectively, P<0.05) and platelet count (with Z values of -3.35 and -3.58, respectively, P<0.05) were significantly reduced before the first surgery and on the first day after the first surgery, and the mortality rate within 30 days of admission was significantly higher ( χ2=4.03, P<0.05). There were no statistically significant differences in other indexes between the two groups of patients ( P>0.05). Multivariate logistic regression analysis showed that age, total burn area, and intraoperative hypothermia were independent risk factors for the occurrence of atrial fibrillation in adult patients with critically severe burns after the first surgery (with odds ratios of 1.08, 1.07, and 4.18, 95% confidence intervals of 1.03-1.12, 1.03-1.11, and 1.48-11.80, respectively, P<0.05). Conclusions:Age, total burn area, and intraoperative hypothermia are independent risk factors for the occurrence of atrial fibrillation in adult patients with critically severe burns after the first surgery. Patients with atrial fibrillation have an increased risk of death.
4.Effect of Isodon ternifolius-medicated serum on hepatic stellate cells based on TLR4/NF-κB/NLRP3 signaling pathway.
Gui-Dong HUANG ; Zhi-Pin ZHOU ; Zhi PANG ; Le QIN ; Rui-Sheng WU ; Yong CHEN ; Xiao-Xue YE
China Journal of Chinese Materia Medica 2023;48(14):3913-3921
The present study aimed to investigate the inhibitory effect and mechanism of Isodon terricolous-medicated serum on lipopolysaccharide(LPS)-induced hepatic stellate cell(HSC) activation. LPS-induced HSCs were divided into a blank control group, an LPS model group, a colchicine-medicated serum group, an LPS + blank serum group, an I. terricolous-medicated serum group, a Toll-like receptor 4(TLR4) blocker group, and a TLR4 blocker + I. terricolous-medicated serum group. HSC proliferation was detected by methyl thiazolyl tetrazolium(MTT) assay. Enzyme-linked immunosorbent assay(ELISA) was used to measure type Ⅰ collagen(COL Ⅰ), COL Ⅲ, transforming growth factor-β1(TGF-β1), intercellular adhesion molecule-1(ICAM-1), α-smooth muscle actin(α-SMA), vascular cell adhesion molecule-1(VCAM-1), cysteinyl aspartate-specific proteinase-1(caspase-1), and monocyte chemotactic protein-1(MCP-1). Real-time PCR(RT-PCR) was used to detect mRNA expression of TLR4, IκBα, and NOD-like receptor thermal protein domain associated protein 3(NLRP3), nuclear factor-κB(NF-κB) p65, gasdermin D(GSDMD), and apoptosis-associated speck-like protein containing a CARD(ASC) in HSCs. Western blot(WB) was used to detect the protein levels of TLR4, p-IκBα, NF-κB p65, NLRP3, ASC, and GSDMD in HSCs. The results showed that I. terricolous-medicated serum could inhibit the proliferation activity of HSCs and inhibit the secretion of COL Ⅰ, COL Ⅲ, α-SMA, TGF-β1, caspase-1, MCP-1, VCAM-1, and ICAM-1 in HSCs. Compared with the LPS model group, the I. terricolous-medicated serum group, the colchicine-medicated serum group, and the TLR4 blocker group showed down-regulated expression of p-IκBα, NLRP3, NF-κB p65, GSDMD, and ASC, and up-regulated expression of IκBα. Compared with the TLR4 blocker group, the TLR4 blocker + I. terricolous-medicated serum group showed decreased expression of TLR4, p-IκBα, NLRP3, NF-κB p65, GSDMD, and ASC, and increased expression of IκBα. In conclusion, I. terricolous-medicated serum down-regulates HSC activation by inhibiting the TLR4/NF-κB/NLRP3 signaling pathway.
NF-kappa B/metabolism*
;
Hepatic Stellate Cells
;
Transforming Growth Factor beta1/metabolism*
;
NF-KappaB Inhibitor alpha/metabolism*
;
Intercellular Adhesion Molecule-1/metabolism*
;
Isodon
;
NLR Family, Pyrin Domain-Containing 3 Protein/metabolism*
;
Toll-Like Receptor 4/metabolism*
;
Vascular Cell Adhesion Molecule-1/metabolism*
;
Lipopolysaccharides/pharmacology*
;
Signal Transduction
;
Colchicine/pharmacology*
;
Caspases
5.Observation on the efficacy of conbercept combined with subthreshold micropulsed laser photocoagulation in the treatment of diabetic macular edema
Chinese Journal of Ocular Fundus Diseases 2023;39(2):132-136
Objective:To observe the efficacy of intravitreal injection of conbercept (IVC) combined with subthreshold micropulse laser photocoagulation (SMLP) in the treatment of diabetic macular edema (DME).Methods:A randomized controlled trial. From December 2020 to January 2022, 100 patients (100 eyes) with DME diagnosed by examination in Shanxi Aier Eye Hospital were included in the study. The patients were randomly divided into IVC group (50 eyes) and IVC+SMLP group (50 eyes). All the eyes were treated with IVC once a month for 3 times, and the eyes in IVC+SMLP group were treated with SMLP within 2 weeks after IVC. All affected eyes were examined by best corrected visual acuity (BCVA), which was statistically converted to logarithm of the minimum angle of resolution (logMAR) visual acuity. The central macular thickness (CMT) was measured by optical coherence tomography. Before the treatment, the logMAR BCVA of patients in IVC group and IVC+SMLP group were 0.56±0.04 and 0.55±0.03, respectively. The CMT were (437.36±11.35) μm and (434.58±10.88) μm, respectively. There was no significant difference in logMAR BCVA and CMT between the two groups ( t= 0.476, 1.027; P>0.05). The patients were followed up for 12 months after treatment. The times of IVC and the changes of BCVA and CMT were compared between the two groups. Independent sample t-test was used to compare the logMAR BCVA, CMT and times of IVC between groups. Results:After 12 months treatment, the logMAR BCVA of IVC group and IVC+SMLP group were (241.63±29.79) μm and (240.47±30.46) μm, respectively. Compared with those before treatment, 12 months after treatment, the BCVA of the two groups increased significantly ( t=7.014, 5.608; P<0.001), while CMT decreased significantly ( t=8.126, 6.013; P<0.001). There was no significant difference in BCVA and CMT between the two groups ( t=0.835, 0.764; P>0.05). The number of IVC in IVC group and IVC+SMLP group were (8.15±2.04) times and (5.91±1.80) times, respectively, and the difference was statistically significant ( t=5.210, P<0.001). Conclusions:Both IVC+SMLP and IVC alone can effectively reduce CMT and increase BCVA in patients with DME. Combination therapy can reduce the number of IVC.
6.Effects of miniature free groin perforator flaps in repairing small wounds on hands
Feng LIU ; Wei ZHANG ; Weiguo XIE ; Lan CHEN ; Weidong ZHANG ; Jinxiu ZHOU ; Ze LI
Chinese Journal of Burns 2023;39(10):933-938
Objective:To investigate the effects of miniature free groin perforator flaps in repairing small wounds on hands.Methods:The retrospective observational study was conducted. Fifteen patients with 16 small wounds on hands were admitted to Tongren Hospital of Wuhan University & Wuhan Third Hospital from July 2020 to October 2022, including 12 males and 3 females, aged 19 to 56 years. The size of skin and soft tissue defect was 2.0 cm×1.5 cm to 6.0 cm×3.0 cm after debridement. According to size and shape of the wounds, 13 single-lobe perforator flaps and 2 bilobed perforator flaps were designed in the groin region, with the flap size of 4.5 cm×2.5 cm to 7.5 cm×3.5 cm. According to the condition of the recipient area, the arteries and veins at the pedicle of the flap were anastomosed to the arteries and veins of the recipient area respectively. The wounds in the donor area of the flap was closed by layered and tension-reducing suture. The thickness of the flap was measured during operation. The survival of the flap was observed, and the complications in the donor and recipient areas were recorded after operation. The appearance and texture of the flap were observed during follow-up. At the last follow-up, the sensory recovery of the affected hand was evaluated, the function of the affected hand was evaluated according to the trial standard of the upper limb partial function evaluation of the Hand Surgery Society of the Chinese Medical Association, the scar in the donor and recipient areas were observed, and the satisfaction of patients for the curative effects was inquired.Results:The thickness of the flap was ranged from 0.3 to 1.0 cm, with an average thickness of 0.6 cm. After operation, 11 single-lobe flaps and 2 bilobed flaps survived well; in the left 2 single-lobe flaps, one flap had venous crisis but returned to normal after removing stitches to reduce tension and bloodletting of flaps, while the other one flap had a little necrosis on tip but healed after dressing change. No complications occurred in donor and recipient areas. During follow-up of 8 to 35 months after operation, the flaps had good elasticity and soft texture; 8 flaps were slightly bloated and were trimmed 3 to 8 months after operation, while the appearances of the other flaps were good. At the last follow-up, all flaps recovered protective feeling; the function of the affected hand was evaluated as excellent in 10 cases, good in 4 cases, and fair in 1 case; only linear scar remained in the donor and recipient areas; the patients were satisfied with the appearance and function recovery of the affected hand.Conclusions:The miniature free groin perforator flaps in repairing small wounds on hands have the advantages of high survival rate of flaps, hidden flap donor area, little damage, few complications, good repair effect, etc., showing clinical application value. It is recommended for repairing non-functional wounds on hands.
7.Clinical effects of free transplantation of inguinal flap in repairing electrical burn wounds of mice in the limbs
Junhui XU ; Wei ZHANG ; Jinxiu ZHOU ; Lan CHEN ; Weidong ZHANG ; Xiang GONG ; Weiguo XIE
Chinese Journal of Burns 2023;39(11):1030-1037
Objective:To investigate the clinical effects of free transplantation of inguinal flap in repairing electrical burn wounds of mice in the limbs.Methods:A retrospective observational study was conducted. From January 2012 to May 2023, 24 male patients with electrical burns in the limbs meeting the inclusion criteria, aged 20 to 69 years, were admitted to the Department of Burns of Tongren Hospital of Wuhan University & Wuhan Third Hospital. Totally 27 limbs were involved, including 18 upper limbs and 9 lower limbs. After debridement, the wound area in the limbs proposed to be repaired with the inguinal flap was 5.0 cm×1.5 cm-20.0 cm×9.0 cm. A total of 26 operations were performed in 24 patients, and 27 free inguinal flaps with area being 5.0 cm×3.5 cm-22.0 cm×12.0 cm were resected, including 6 for lobed transplantation, 2 for chimeric transplantation with iliac bone graft, 3 for conjoined transplantation with pedicled latissimus dorsi myocutaneous flap, and 1 for conjoined transplantation with free paraumbilical perforator flap. Indocyanine green angiography was used to evaluate the blood supply of the inguinal flap during operation, to guide arterial supercharge during transplantation. Among the transplanted inguinal flaps, 5 were pedicled with the common trunk of the superficial circumflex iliac artery and the superficial abdominal wall artery, 13 were pedicled with the superficial circumflex iliac artery alone, 6 were pedicled with the superficial abdominal wall artery alone, and the remaining 3 were simultaneously anastomosed with the superficial circumflex iliac artery and the superficial abdominal wall artery for arterial supercharge. In another patient, the deep branch of the superficial circumflex iliac artery was used as a bridging vessel to recanalize the proper artery of the index finger in the distal segment. The wound in the donor area were sutured directly. The blood supply status of the inguinal flap immediately after resection but before cutting off blood vessels and after transplantation and vascular anastomosis was recorded. The survival of the tissue flap, the fixation of the iliac bone graft, and the healing of secondary defect in the donor area were observed after surgery. The appearance of the inguinal flap and the functional recovery of the recipient area were followed up. At the last follow-up, the function of the affected upper limb was scored using the Arm, Shoulder, and Hand Disability (DASH) scoring scale, and the satisfaction of patients with the efficacy of each surgical treatment was investigated by referring to the 5-level Likert scale.Results:Totally 27 inguinal flaps showed good arterial blood perfusion and venous return immediately after resection but before cutting off blood vessels and after transplantation and vascular anastomosis. Except for one inguinal flap that developed necrosis 12 days after operation and was repaired by split-thickness skin graft from the head, the remaining 26 inguinal flaps and conjointly transplanted tissue flaps survived completely without vascular crisis. The iliac bone graft was fixed securely after operation. All secondary defects in donor area healed well after operation. After 6 to 36 months of follow-up, the inguinal flap was soft in texture, without obvious swelling, the function of the recipient area was significantly improved as compared with that before surgery, and the protective feeling of the inguinal flap was restored. At the last follow-up, the functional scores of DASH scoring scale of the 18 affected upper limbs ranged from 0 to 100 (with a mean of 27). The patients were very satisfied with the efficacy of 17 surgical treatments and relatively satisfied with the efficacy of 9 surgical treatments.Conclusions:The donor area of the inguinal flap is concealed, and the damage resulted from flap resection in this area is small. This flap has a rich blood supply. In the electrical burn wounds of mice in the limbs repaired with lobed transplantation, chimeric transplantation, and conjoined transplantation with other flaps, the appearance and function of the recipient area are well restored, and the patients' satisfaction with the efficacy of surgical treatment is high, which is worthy of clinical promotion.
8.Clinical features and genetic analysis of a Chinese pedigree affected with X-linked adrenoleukodystrophy.
Lingen KONG ; Jinhua QIU ; Caiming LI ; Qianwu ZHOU ; Zhiwei QIU ; Shunzhi ZHUANG ; Jinxiu ZOU ; Yanxia ZHENG
Chinese Journal of Medical Genetics 2022;39(1):60-63
OBJECTIVE:
To analyze the clinical features and variants of ABCD1 gene in a Chinese pedigree affected with X-linked adrenoleukodystrophy.
METHODS:
Clinical data of the proband were collected and analyzed. Potential variant of the ABCD1 gene were analyzed by PCR and Sanger sequencing of the proband, his parents and 100 unrelated healthy individuals.
RESULTS:
The prominent features of the proband included cerebellar and brainstem lesions, along with increased serum level of very-long chain fatty acids. He was found to harbor a hemizygous c.1509delG (p.L504Sfs*54) variant of the ABCD1 gene, for which his mother was heterozygous. The same variant was not detected in his father and 100 healthy controls.
CONCLUSION
X-linked adrenoleukodystrophy has a variety of clinical manifestations. Discovery of the c.1509delG (p.L504Sfs*54), as a novel pathogenic variant of the ABCD1 gene, has enabled diagnosis and genetic counseling for this pedigree.
Adrenoleukodystrophy/genetics*
;
Asians/genetics*
;
China
;
Female
;
Genetic Testing
;
Humans
;
Male
;
Mutation
;
Pedigree
9.Effect of remimazolam pretreatment on brain injury following thalamic hemorrhage in mice
Zhen ZHANG ; Jinxiu HUANG ; Changsheng LI ; Xihua LU ; Changhong MIAO ; Yi ZHOU
Chinese Journal of Anesthesiology 2021;41(12):1518-1522
Objective:To evaluate the effect of remimazolam pretreatment on brain injury following thalamic hemorrhage in mice.Methods:Sixty clean-grade healthy adult CD1 male mice, weighing 25-30 g, aged 7-8 weeks, were divided into 3 groups ( n=20 each) by using a random number table method: sham operation group (Sham group), brain injury group (BI group) and remimazolam pretreatment group (Rem group). Remimazolam 25 mg/kg was intravenously injected via the tail vein in group Rem.and the equal volume of normal saline was given instead in Sham group and BI group.Ten min later, type Ⅳ collagenase 0.01 U/10 nl was microinjected into unilateral ventroposterolateral nucleus and ventromedial nucleus to develop a mouse model of brain jury induced by thalamic hemorrhage.The rats were sacrificed at 6 h after developing the model, brain tissues were taken for measurement of the wet/dry weight (W/D) ratio, and hippocampal tissues were taken and stained with haematoxylin and eosin for determination of the count of the viable neurons in the hippocampal dentategyrus area, count of apoptotic neurons in the hippocampal CA1 region (by TUNEL), expression of CCAAT/enhancer-binding protein homologous protein (CHOP), activating transcription factor 4 (ATF4) and X-box binding protein-1 (XBP1) mRNA (by real-time polymerase chain reaction) and expression of CHOP, Bcl-2, Bax and caspase-3 (by Western blot) and for microscopic examination of ultrastructure of hippocampal tissues (with a transmission electron microscope). Results:Compared with group Sham, the W/D ratio of brain tissues and count of apoptotic neurons in the hippocampal CA1 area were significantly increased, the count of viable neurons in the hippocampal dentate gyrus was decreased, the expression of CHOP, ATF4 and XBP1 mRNA in hippocampal tissues was up-regulated, the expression of CHOP, caspase-3 and Bcl-2 was up-regulated, and the expression of Bax was down-regulated in BI and Rem groups ( P<0.05). Compared with group BI, the W/D ratio of brain tissues and count of apoptotic neurons in the hippocampal CA1 area were significantly decreased, the number of viable neurons in the hippocampal dentate gyrus was increased, the expression of CHOP, ATF4 and XBP1 mRNA in hippocampal tissues was down-regulated, the expression of CHOP, caspase-3 and Bcl-2 was down-regulated, and the expression of Bax was up-regulated in group Rem ( P<0.05). Conclusion:Remimazolam pretreatment can reduce the brain injury following thalamic hemorrhage in mice, and the mechanism may be related to inhibition of cell apoptosis induced by endoplasmic reticulum stress in hippocampus.
10.Development of a UHPLC-MS/MS method for the quantification of ilaprazole enantiomers in rat plasma and its pharmacokinetic application
Fengting OU ; Ying ZHOU ; Jinxiu LEI ; Su ZENG ; Fuhai WU ; Ning ZHANG ; Lushan YU
Journal of Pharmaceutical Analysis 2020;10(6):617-623
In Korea and China, ilaprazole is a widely used proton pump inhibitor in the treatment of gastric ulcers. In this study, a specific and sensitive LC-MS/MS method has been developed and validated for the quantification of ilaprazole enantiomers in the rat plasma, using R-lansoprazole as the internal standard. The enantioseparation was achieved on a CHIRALPAK AS-RH column (4.6 mm × 150 mm, i.d. 5μm), with a mobile phase composed of 10 mM ammonium acetate aqueous solution and acetonitrile (60:40, V/V), at a flow-rate of 0.5 mL/min. The method was validated over the concentration range of 0.5-300 ng/mL for both, R- and S -ilaprazole. The lower limit of quantification was 0.5 ng/mL for both enantiomers. The relative standard deviation (RSD) of intra- and inter-day precision of R-ilaprazole and S-ilaprazole was less than 10.9%, and the relative error accuracy (RE) ranged from -0.5%-2.0%. Finally, the method was successfully evaluated in rats in a stereoselective pharmacokinetic study of the ilaprazole racemate.

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