1.Change trend of angle Kappa after intraocular lens implantation in cataract patients and its relationship with the stability of intraocular lens
International Eye Science 2025;25(3):455-460
AIM: To investigate the change trend of angle Kappa after intraocular lens(IOL)implantation in cataract patients and its relationship with IOL stability.METHODS: A total of 120 patients(120 eyes)with cataract who received IOL implantation in our hospital from February 2023 to January 2024 were selected as the research objects, including 56 left eyes and 64 right eyes. The results of ophthalmic examination, the distribution of angle Kappa, the changes of angle Kappa and the stability of IOL at different time points before and after operation were compared. Pearson correlation analysis and multiple linear regression analysis were used to analyze the correlation between IOL rotational stability and ophthalmic examination indexes. Multiple linear regression analysis was used to analyze the correlation between angle Kappa and IOL stability.RESULTS: After surgery, angle Kappa decreased and the degree of decrease decreased gradually(all P<0.05), and the IOL rotation degree also decreased gradually(P<0.05). The degree of IOL rotation at 2 mo after surgery was positively correlated with axial length(AL), lens thickness(LT), horizontal keratometer(K1), vertical keratometer(K2), pupil diameter(PD)and angle Kappa at 1 d after surgery(all P<0.05), and negatively correlated with anterior chamber depth(ACD)at 1 d after surgery(all P<0.05). AL, ACD, PD and angle Kappa had significant effects on IOL rotation degree(all P<0.05). With the increase of angle Kappa, the degree of IOL rotation gradually increased, that is, the stability of IOL gradually decreased(P<0.05).CONCLUSION: Angle Kappa decreased significantly after IOL implantation in cataract patients, and then tended to be stable. The stability of IOL decreased with the increase of angle Kappa.
2.Change trend of angle Kappa after intraocular lens implantation in cataract patients and its relationship with the stability of intraocular lens
International Eye Science 2025;25(3):455-460
AIM: To investigate the change trend of angle Kappa after intraocular lens(IOL)implantation in cataract patients and its relationship with IOL stability.METHODS: A total of 120 patients(120 eyes)with cataract who received IOL implantation in our hospital from February 2023 to January 2024 were selected as the research objects, including 56 left eyes and 64 right eyes. The results of ophthalmic examination, the distribution of angle Kappa, the changes of angle Kappa and the stability of IOL at different time points before and after operation were compared. Pearson correlation analysis and multiple linear regression analysis were used to analyze the correlation between IOL rotational stability and ophthalmic examination indexes. Multiple linear regression analysis was used to analyze the correlation between angle Kappa and IOL stability.RESULTS: After surgery, angle Kappa decreased and the degree of decrease decreased gradually(all P<0.05), and the IOL rotation degree also decreased gradually(P<0.05). The degree of IOL rotation at 2 mo after surgery was positively correlated with axial length(AL), lens thickness(LT), horizontal keratometer(K1), vertical keratometer(K2), pupil diameter(PD)and angle Kappa at 1 d after surgery(all P<0.05), and negatively correlated with anterior chamber depth(ACD)at 1 d after surgery(all P<0.05). AL, ACD, PD and angle Kappa had significant effects on IOL rotation degree(all P<0.05). With the increase of angle Kappa, the degree of IOL rotation gradually increased, that is, the stability of IOL gradually decreased(P<0.05).CONCLUSION: Angle Kappa decreased significantly after IOL implantation in cataract patients, and then tended to be stable. The stability of IOL decreased with the increase of angle Kappa.
3.A deep learning model for the diagnosis of first-episode schizophrenia and grading of EEG abnormalities using EEG signals
Lili SHUI ; Chenchen LIU ; Yumin LI
Sichuan Mental Health 2025;38(4):308-314
BackgroundSchizophrenia is a highly heterogeneous disease with different clinical subtypes. Artificial intelligence technology represented by deep learning models has provided considerable benefits for the electroencephalogram (EEG)-based schizophrenia diagnosis, treatment and research, however, to date little research has been conducted regarding any of these benefits among Chinese schizophrenic patients. ObjectiveTo investigate the application of deep learning techniques utilizing EEG parameters for the diagnosis of first-episode schizophrenia and grading of EEG abnormalities in patients, with the aim of contributing to improved clinical diagnosis and treatment strategies for the disorder. MethodsFrom January 2020 to January 2023, a total of 130 patients with first-episode schizophrenia who met the diagnostic criteria of International Classification of Diseases, tenth edition (ICD-10), and attended at the Third People's Hospital of Fuyang, along with 150 health checkup examinees, were enrolled. All of them underwent EEG examination. An optimized long short-term memory (LSTM) deep learning model was developed utilizing EEG signals. Ten-fold cross-validation method was employed to evaluate the model's performance. The dataset was then split into two components: a training set (90%) for LSTM model development and a test set (10%) for validation. The accuracy, recall rate, precision, F1-score, schizophrenia diagnosis and EEG abnormality grading were used as evaluation indicators, and the results of the proposed model were compared to the assessments made by experienced psychiatrists. ResultsFor schizophrenia diagnosis, the modeling group achieved the following performance metrics: precision (94.40±3.03)%, recall rate (94.30±3.23)%, accuracy (94.60±2.22)%, and F1-score (94.20±2.20)%. In the validation group, the corresponding metrics were precision (90.90±2.85)%, recall rate (92.20±1.14)%, accuracy (92.20±1.69)%, and F1-score (91.50±1.78)%. Statistical analysis revealed no significant differences between the LSTM diagnostic model and the experienced psychiatrists in terms of precision, recall rate, accuracy, and F1-score for schizophrenia diagnosis (χ2=1.500, 0.750, 2.722, 1.056, P>0.05). The modeling group demonstrated an accuracy rate of (91.71±1.73)% in grading EEG abnormalities. For Grade 1 abnormalities, the modeling group reported a precision of (96.40±2.39)%, a recall rate of (94.77±1.40)%, and an F1-score of (95.55±1.14)%. In the case of Grade 2 abnormalities, the precision was (85.89±2.04)%, the recall rate was (88.10±6.18)%, and the F1-score was (87.06±3.12)%. For the more severe Grade 3 abnormalities, the modeling group's precision was (79.61±7.33)%, the recall rate was (81.79±9.87)%, and the F1-score was (80.41±6.79)%. Additionally, the validation group exhibited an accuracy rate of (85.61±6.16)%. The precision, recall rate, and F1-score for Grade 1 abnormalities were (91.43±6.25)%, (92.64±9.65)% and (91.56±4.83)%, respectively. For Grade 2 abnormalities, these metrics were (71.17±19.02)%, (77.64±17.24)% and (71.88±11.33)%. In the case of Grade 3 abnormalities, the precision was (90.00±21.08)%, the recall rate was (80.00±25.82)%, and the F1-score was (81.67±19.95)%. There was no significant difference in the accuracy, recall, accuracy and F1 value between LSTM model and senior doctors in evaluating the abnormal degree of EEG in schizophrenia (χ2=0.098, 0.036, 0.020, 0.336, P>0.05). The LSTM model takes less time to diagnose schizophrenia and EEG abnormalities than senior doctors, and the differences were statistically significant (t=57.147, 43.104, P<0.01). ConclusionThe study utilizes an EEG-based LSTM deep learning model for diagnosing first-episode schizophrenia and grading EEG abnormalities, and the model not only matches the performance of experienced psychiatrists but also significantly reduces the time required for diagnosis.
4.Clinical Characteristics and Early Risk Factors for Toxic Encephalopathy in Acute Diquat Poisoning
Yihong YANG ; Jiawei LI ; Xiaojuan LIU ; Qiqi LIU ; Hongbo LIU ; Guanghua XIONG ; Yecheng LIU
Medical Journal of Peking Union Medical College Hospital 2025;16(5):1229-1235
To analyze the clinical characteristics of acute diquat poisoning complicated by central nervous system injury (CNSI) and identify early risk factors, aiming to provide a theoretical basis for reducing mortality in diquat poisoning with CNSI. Clinical data from patients with acute diquat poisoning admitted to the Emergency Department of Fuyang People's Hospital Affiliated to Anhui Medical University between October 2019 and October 2024 were retrospectively analyzed. Patients were divided into CNSI and non-CNSI groups based on complications. Clinical features were compared between groups, and variables with statistical significance were subjected to binary logistic regression to identify independent risk factors for CNSI. Receiver operating characteristic (ROC) curves were generated to evaluate the predictive value of these factors. A total of 63 eligible patients were included, with 18 deaths (28.57%) and 26 cases (41.27%) complicated by CNSI. The median time from diquat ingestion to CNSI onset was 15.5 (9.8, 31.3) hours. The CNSI group exhibited significantly higher mortality rates and required more frequent respiratory support and anti-shock therapy than the non-CNSI group (all CNSI is a fatal complication of acute diquat poisoning with high mortality. Diquat plasma concentration (≥549.95 μg/L) and APACHE Ⅱ score are independent risk factors for CNSI, and their combined application enhances predictive accuracy. These findings underscore the importance of early risk stratification and targeted interventions in high-risk populations.
5.Long-term safety and effectiveness of roxadustat in Chinese patients with chronic kidney disease-associated anemia: The ROXSTAR registry.
Xiaoying DU ; Yaomin WANG ; Haifeng YU ; Jurong YANG ; Weiming HE ; Zunsong WANG ; Dongwen ZHENG ; Xiaowei LI ; Shuijuan SHEN ; Dong SUN ; Weimin YU ; Detian LI ; Changyun QIAN ; Yiqing WU ; Shuting PAN ; Jianghua CHEN
Chinese Medical Journal 2025;138(12):1465-1476
BACKGROUND:
Chronic kidney disease (CKD)-associated anemia (CKD-anemia) is associated with poor survival, and hemoglobin targets are often not achieved with current therapies. Phase 3 trials have demonstrated the treatment efficacy of roxadustat for CKD-anemia. This phase 4 study aims to evaluate the long-term (52-week) safety and effectiveness of roxadustat in a broad real-world patient population with CKD-anemia with and without dialysis in China.
METHODS:
This Phase 4 multicenter, open-label, prospective study, conducted from 24 November 2020 to 11 November 2022, evaluated the long-term safety and effectiveness of roxadustat for CKD-anemia in China. Patients aged ≥18 years with CKD-anemia with or without dialysis were included. The initial oral dose was 70-120 mg (weight-based followed by dose adjustment) over 52 weeks. The primary endpoint was safety based on adverse events (AEs). The secondary endpoints were hemoglobin changes from baseline and the proportion of patients who achieved mean hemoglobin ≥100 g/L. Effectiveness evaluable populations 1 (EE1) and EE2 included roxadustat-naïve and previously roxadustat-treated patients, respectively. The safety analysis set (SAF) included all patients who received ≥1 occasion.
RESULTS:
The EE1, EE2, and SAF populations included 1804, 193, and 2021 patients, respectively. In the SAF, the mean age was 50 ± 14 years, and 1087 patients (53.8%) were male. Mean baseline hemoglobin was 96.9 ± 14.0 g/L in EE1 and 100.3 ± 12.9 g/L in EE2. In EE1, the mean (95% confidence interval) hemoglobin changes from baseline over weeks 24-36 and 36-52 were 14.2 (13.5-14.9) g/L and 14.3 (13.5-15.0) g/L, respectively. Over weeks 24-36 and 36-52, 83.3% and 86.1% of patients in EE1 and 82.7% and 84.7% in EE2 achieved mean hemoglobin ≥100 g/L, respectively. In the SAF, 1643 (81.3%) patients experienced treatment-emergent AEs (TEAEs). Overall, 219 (10.8%) patients experienced drug-related TEAEs. Thirty-eight (1.9%) patients died of TEAEs (unrelated to the study drug). Vascular access thrombosis was uncommon.
CONCLUSIONS:
Roxadustat (52 weeks) increased hemoglobin and maintained the treatment target in Chinese patients with CKD-anemia with acceptable safety, supporting its use in real-world settings.
REGISTRATION
Chinese Clinical Trial Registry ( www.chictr.org.cn ) ChiCTR2100046322; CDE ( www.chinadrugtrials.org.cn ) CTR20201568.
Humans
;
Male
;
Female
;
Anemia/etiology*
;
Middle Aged
;
Renal Insufficiency, Chronic/complications*
;
Glycine/adverse effects*
;
Isoquinolines/adverse effects*
;
Aged
;
Prospective Studies
;
Adult
;
Hemoglobins/metabolism*
;
Treatment Outcome
;
China
;
Registries
;
East Asian People
6.Wrist arthroscopic Wafer surgery combined with triangular fibrocartilage complex insertion point reconstruction in treatment of Palmer type ⅡC combined with type ⅠB ulnar impingement syndrome.
Yong LI ; Mingming MA ; Xiaojun RUAN ; Yongbin FU
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(1):59-63
OBJECTIVE:
To investigate the effectivess of arthroscopic Wafer surgery combined with triangular fibrocartilage complex (TFCC) insertion point reconstruction in the treatment of Palmer type ⅡC combined with typeⅠB ulnar impingement syndrome.
METHODS:
The clinical data of 14 patients with Parlmer type ⅡC combined with type ⅠB ulnar impingement syndrome who met the selection criteria between July 2021 and April 2024 were retrospectively analyzed. There were 7 males and 7 females with an average age of 43 years ranging from 16 to 59 years. The causes of injury were fall in 8 cases and sprain in 6 cases. The time from injury to operation ranged from 1 to 6 months, with an average of 2.3 months. Distal radioulnar joint instability was found in all cases. Arthroscopic Wafer surgery combined with TFCC insertion point reconstruction was used. The effectiveness was evaluated by comparing the wrist flexion-dorsiflexion range of motion, wrist ulnar deviation-radial deflection range of motion, forearm pronation-supination range of motion, visual analogue scale (VAS) score, and modified Mayo wrist score before and after operation.
RESULTS:
All patients were followed up 6-12 months, with an average of 9.1 months. The positive variation of ulna was (3.2±0.7) mm before operation, and the negative variation of ulna was (2.2±0.6) mm after operation. There was a significant difference in ulna variation between pre- and post-operation ( t=23.851, P<0.001). The pain symptoms and forearm rotation function of the patients after operation significantly improved. At last follow-up, the wrist flexion-dorsiflexion range of motion, wrist ulnar deviation-radial deflection range of motion, forearm pronation-supination range of motion, VAS score, and modified Mayo wrist score significantly improved when compared with those before operation ( P<0.05).
CONCLUSION
Arthroscopic Wafer surgery combined with TFCC insertion point reconstruction can effectively relieve wrist pain, enhance the stability of the distal radioulnar joint, and restore the function of the wrist in patients with Palmer type ⅡC combined with type ⅠB ulnar impingement syndrome.
Humans
;
Male
;
Adult
;
Arthroscopy/methods*
;
Female
;
Triangular Fibrocartilage/surgery*
;
Middle Aged
;
Range of Motion, Articular
;
Retrospective Studies
;
Wrist Joint/physiopathology*
;
Adolescent
;
Young Adult
;
Ulna/surgery*
;
Treatment Outcome
;
Wrist Injuries/surgery*
;
Plastic Surgery Procedures/methods*
;
Joint Instability/surgery*
7.Effectiveness of digital three-dimensional printing osteotomy guide plate assisted total knee arthroplasty in treatment of knee osteoarthritis patients with femoral internal implant.
Chao LI ; Binbin ZHANG ; Xiangping LIU ; Haiya LI ; Jingtang ZHANG ; Min WU
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(2):151-157
OBJECTIVE:
To investigate the effectiveness of digital three-dimensional (3D) printing osteotomy guide plate assisted total knee arthroplasty (TKA) in treatment of knee osteoarthritis (KOA) patients with femoral internal implants.
METHODS:
The clinical data of 55 KOA patients who met the selection criteria between July 2021 and October 2023 were retrospectively analyzed. Among them, 26 cases combined with femoral implants were treated with digital 3D printing osteotomy guide plate assisted TKA (guide plate group), and 29 cases were treated with conventional TKA (control group). There was no significant difference in gender, age, body mass index, side, Kellgren-Lawrence classification, preoperative visual analogue scale (VAS) score, Hospital for Special Surgery (HSS) knee score, knee range of motion, and other baseline data between the two groups ( P>0.05). The operation time, intraoperative blood loss, incision length, postoperative first ambulation time, surgical complications; VAS score, knee HSS score, knee range of motion before operation, at 1 week and 3 months after operation, and at last follow-up; distal femoral lateral angle, proximal tibial medial angle, hip-knee-ankle angle and other imaging indicators at last follow-up were recorded and compared between the two groups.
RESULTS:
The operation time, incision length, intraoperative blood loss, and postoperative first ambulation time in the guide plate group were significantly lower than those in the control group ( P<0.05). In the control group, there were 1 case of incision rupture and bleeding and 1 case of lower limb intermuscular venous thrombosis, which was cured after symptomatic treatment. There was no complication such as neurovascular injury, incision infection, or knee prosthesis loosening in both groups. Patients in both groups were followed up 12-26 months, with an average of 16.25 months. The VAS score, HSS score, and knee range of motion improved at each time point after operation in both groups, and further improved with time after operation, the differences were significant ( P<0.05). The above indicators in the guide plate group were significantly better than those in the control group at 1 week and 3 months after operation ( P<0.05), and there was no significant difference between the two groups at last follow-up ( P>0.05). At last follow-up, the distal femoral lateral angle, the proximal tibial medial angle, and the hip-knee-ankle angle in the guide plate group were significantly better than those in the control group ( P<0.05).
CONCLUSION
The application of digital 3D printing osteotomy guide plate assisted TKA in the treatment of KOA patients with femoral implants can simplify the surgical procedures, overcome limitations of conventional osteotomy guides, reduce surgical trauma, achieve individualized and precise osteotomy, and effectively restore lower limb alignment and knee joint function.
Humans
;
Arthroplasty, Replacement, Knee/instrumentation*
;
Osteoarthritis, Knee/surgery*
;
Osteotomy/instrumentation*
;
Male
;
Retrospective Studies
;
Female
;
Printing, Three-Dimensional
;
Femur/surgery*
;
Middle Aged
;
Bone Plates
;
Range of Motion, Articular
;
Aged
;
Treatment Outcome
;
Surgery, Computer-Assisted/methods*
;
Knee Prosthesis
;
Knee Joint/surgery*
;
Operative Time
8.Application of functional perforator flap transplantation with chimeric iliac bone flap in reconstruction of composite tissue defects of hand or foot.
Junjie LI ; Huihui GUO ; Bin LUO ; Huihai YAN ; Mingming MA ; Tengfei LI ; Tao NING ; Wei JIAO
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(9):1098-1105
OBJECTIVE:
To evaluate the effectiveness of functional perforator flaps utilizing the superficial circumflex iliac artery as a vascular pedicle, as well as chimeric iliac bone flaps, in the reconstruction of composite tissue defects in the hand and foot.
METHODS:
A retrospective review of the clinical data from 13 patients suffering from severe hand or foot injuries, treated between May 2019 and January 2025, was conducted. The cohort comprised 8 males and 5 females, with ages ranging from 31 to 67 years (mean, 48.5 years). The injuries caused by mechanical crush incidents (n=9) and traffic accidents (n=4). The distribution of injury sites included 8 cases involving the hand and 5 cases involving the foot. Preoperatively, all patients exhibited bone defects ranging from 2.0 to 6.5 cm and soft tissue defects ranging from 10 to 210 cm2. Reconstruction was performed using functional perforator flaps based on the superficial circumflex iliac artery and chimeric iliac bone flaps. The size of iliac bone flaps ranged from 2.5 cm×1.0 cm×1.0 cm to 7.0 cm×2.0 cm×1.5 cm, while the size of the soft tissue flaps ranged from 4 cm×3 cm to 15 cm×8 cm. In 1 case with a significant hand defect, a posterior interosseous artery perforator flap measuring 10.0 cm×4.5 cm was utilized as an adjunct. Likewise, an anterolateral thigh perforator flap measuring 25 cm×7 cm was combined in 1 case involving a foot defect. All donor sites were primarily closed. Postoperative flap survival was monitored, and bone healing was evaluated through imaging examination. Functional outcomes were assessed based on the location of the defects: for hand injuries, grip strength, pinch strength, and flap two-point discrimination were measured; for foot injuries, the American Orthopaedic Foot & Ankle Society (AOFAS) score, visual analogue scale (VAS) score, Maryland Foot Score, plantar pressure distribution and gait symmetry index (GSI) were evaluated.
RESULTS:
All flaps survived completely, with primary healing observed at both donor and recipient sites. All patients were followed up 6-18 months (mean, 12.2 months). No significant flap swelling or deformity was observed. Imaging examination showed a bone callus crossing rate of 92.3% (12/13) at 3 months after operation, and bone density recovered to more than 80% of the healthy side at 6 months. The time required for bone flap integration ranged from 2 to 6 months (mean, 3.2 months). One patient with a foot injury exhibited hypertrophic scarring at the donor site; however, no major complication, such as infection or bone nonunion, was noted. At 6 months after operation, grip strength in 8 patients involving the hand recovered to 75%-90% of the healthy side (mean, 83.2%), while pinch strength recovered to 70%-85% (mean, 80%). Flap two-point discrimination ranged from 8 to 12 mm, approaching the sensory capacity of the healthy side (5-8 mm). Among the 5 patients involving the foot, the AOFAS score at 8 months was 80.5±7.3, VAS score was 5.2±1.6. According to the Maryland Foot Score, 2 cases were rated as excellent and 3 as good. Gait analysis at 6 months after operation showed GSI above 90%, with plantar pressure distribution closely resembling that of the contralateral foot.
CONCLUSION
The use of functional perforator flaps based on the superficial circumflex iliac artery, combined with chimeric iliac bone flaps, provides a reliable vascular supply and effective functional restoration for the simultaneous repair of composite bone and soft tissue defects in the hand or foot. This technique represents a viable and effective reconstructive option for composite tissue defects in these anatomical regions.
Humans
;
Male
;
Middle Aged
;
Female
;
Perforator Flap/transplantation*
;
Adult
;
Plastic Surgery Procedures/methods*
;
Hand Injuries/surgery*
;
Aged
;
Retrospective Studies
;
Foot Injuries/surgery*
;
Ilium/transplantation*
;
Iliac Artery/surgery*
;
Soft Tissue Injuries/surgery*
;
Bone Transplantation/methods*
;
Treatment Outcome
9.Clinical efficacy and safety of vortioxetine as an adjuvant drug for patients with bipolar depression.
Chunxiao DAI ; Yaoyang FU ; Xuanwei LI ; Meihua LIN ; Yinbo LI ; Xiao LI ; Keke HUANG ; Chengcheng ZHOU ; Jian XIE ; Qingwei ZHAO ; Shaohua HU
Journal of Zhejiang University. Science. B 2025;26(1):26-38
OBJECTIVES:
Whether vortioxetine has a utility as an adjuvant drug in the treatment of bipolar depression remains controversial. This study aimed to validate the efficacy and safety of vortioxetine in bipolar depression.
METHODS:
Patients with bipolar Ⅱ depression were enrolled in this prospective, two-center, randomized, 12-week pilot trial. The main indicator for assessing treatment effectiveness was a Montgomery-Asberg Depression Rating Scale (MADRS) of ≥50%. All eligible patients initially received four weeks of lurasidone monotherapy. Patients who responded well continued to receive this kind of monotherapy. However, no-response patients were randomly assigned to either valproate or vortioxetine treatment for eight weeks. By comprehensively comparing the results of MADRS over a period of 4‒12 weeks, a systematic analysis was conducted to determine whether vortioxetine could be used as an adjuvant drug for treating bipolar depression.
RESULTS:
Thirty-seven patients responded to lurasidone monotherapy, and 60 patients were randomly assigned to the valproate or vortioxetine group for eight weeks. After two weeks of combined valproate or vortioxetine treatment, the MADRS score in the vortioxetine group was significantly lower than that in the valproate group. There was no difference in the MADRS scores between the two groups at 8 and 12 weeks. The incidence of side effects did not significantly differ between the valproate and vortioxetine groups. Importantly, three patients in the vortioxetine group appeared to switch to mania or hypomania.
CONCLUSIONS
This study suggested that lurasidone combination with vortioxetine might have potential benefits to bipolar II depression in the early stage, while disease progression should be monitored closely for the risk of switching to mania.
Humans
;
Bipolar Disorder/drug therapy*
;
Vortioxetine/therapeutic use*
;
Male
;
Female
;
Middle Aged
;
Adult
;
Valproic Acid/administration & dosage*
;
Lurasidone Hydrochloride/administration & dosage*
;
Prospective Studies
;
Treatment Outcome
;
Pilot Projects
;
Drug Therapy, Combination
;
Sulfides/therapeutic use*
;
Antidepressive Agents/therapeutic use*
10.Activation of astrocytes in the dorsomedial hypothalamus accelerates sevoflurane anesthesia emergence in mice.
Shuting GUO ; Fuyang CAO ; Yongxin GUO ; Yanxiang LI ; Xinyu HAO ; Zhuoning ZHANG ; Zhikang ZHOU ; Li TONG ; Jiangbei CAO
Journal of Southern Medical University 2025;45(4):751-759
OBJECTIVES:
To investigate the regulatory role of astrocytes in the dorsomedial hypothalamus (DMH) during sevoflurane anesthesia emergence.
METHODS:
Forty-two male C57BL/6 mice were randomized into 6 groups (n=7) for assessing astrocyte activation in the dorsomedial hypothalamus (DMH) under sevoflurane anesthesia. Two groups of mice received microinjection of agfaABC1D promoter-driven AAV2 vector into the DMH for GCaMP6 overexpression, and the changes in astrocyte activity during sevoflurane or air inhalation were recorded using calcium imaging. For assessing optogenetic activation of astrocytes, another two groups of mice received microinjection of an optogenetic virus or a control vector into the DMH with optic fiber implantation, and sevoflurane anesthesia emergence was compared using behavioral experiments. In the remaining two groups, electroencephalogram (EEG) recording during sevoflurane anesthesia emergence was conducted after injection of the hChR2-expressing and control vectors. Anesthesia induction and recovery were assessed by observing the righting reflex. EEG data were recorded under 2.0% sevoflurane to calculate the burst suppression ratio (BSR) and under 1.5% sevoflurane for power spectrum analysis. Immunofluorescence staining was performed to visualize the colocalization of GFAP-positive astrocytes with viral protein signals.
RESULTS:
Astrocyte activity in the DMH decreased progressively as sevoflurane concentration increased. During 2.0% sevoflurane anesthesia, the mice injected with the ChR2-expressing virus exhibited a significantly shortened wake-up time (P<0.05), and optogenetic activation of the DMH astrocytes led to a marked reduction in BSR (P<0.001). Under 1.5% sevoflurane anesthesia, optogenetic activation resulted in a significant increase in EEG gamma power and a significant decrease in delta power in ChR2 group (P<0.01).
CONCLUSIONS
Optogenetic activation of DMH astrocytes facilitates sevoflurane anesthesia emergence but does not significantly influence anesthesia induction. These findings offer new insights into the mechanisms underlying anesthesia emergence and may provide a potential target for accelerating postoperative recovery and managing anesthesia-related complications.
Animals
;
Astrocytes/physiology*
;
Sevoflurane
;
Mice, Inbred C57BL
;
Mice
;
Male
;
Electroencephalography
;
Anesthetics, Inhalation/pharmacology*
;
Hypothalamus/cytology*
;
Anesthesia Recovery Period
;
Methyl Ethers/pharmacology*

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