Demyelination and remyelination play key roles in spinal cord injury (SCI), affecting the recovery of motor and sensory functions. Research in rodent models is extensive, but the study of these processes in non-human primates is limited. Therefore, our goal was to thoroughly study the histological features of demyelination and remyelination after contusion injury of the cervical spinal cord in Macaca fascicularis. In a previous study, we created an SCI model in M. fascicularis by controlling the contusion displacement. We used Eriochrome Cyanine staining, immunohistochemical analysis, and toluidine blue staining to evaluate demyelination and remyelination. The results showed demyelination ipsilateral to the injury epicenter both rostrally and caudally, the former mainly impacting sensory pathways, while the latter primarily affected motor pathways. Toluidine blue staining showed myelin loss and axonal distension at the injury site. Schwann cell-derived myelin sheaths were only found at the center, while thinner myelin sheaths from oligodendrocytes were seen at the center and surrounding areas. Our study showed that long-lasting demyelination occurs in the spinal cord of M. fascicularis after SCI, with oligodendrocytes and Schwann cells playing a significant role in myelin sheath formation at the injury site.
Animals ; Spinal Cord Injuries/physiopathology* ; Demyelinating Diseases/etiology* ; Remyelination/physiology* ; Macaca fascicularis ; Disease Models, Animal ; Myelin Sheath/pathology* ; Oligodendroglia/pathology* ; Schwann Cells/pathology* ; Female ; Spinal Cord/pathology* ; Axons/pathology*

Objective To analyze the diagnostic utility of combining susceptibility-weighted imaging(SWI)with arterial spin labeling(ASL)in patients with acute ischemic stroke(AIS).Methods Fifty AIS patients who admitted to Yongchuan Hospital,Chongqing Medical University from July 2020 to July 2021 were selected.Scans were performed using a 3.0T MRI scanner,including sequences such as FLAIR,DWI,3D-TOF-MRA,3D-ASL,and SWI.The perfusion status of the infarction core,the grading of draining veins around the infarction core,compensation by collateral circulation,the occurrence of hemorrhagic transformation,and prognosis were assessed.Results The grading of draining veins around the infarction core was significantly correlated with NIHSS scores(r=0.869,P＜0.05)and prognosis(r=0.825,P＜0.05).In addition,significant correlations were found between the perfusion status of the infarction core and the occurrence of hemorrhagic transformation(r=0.873,P＜0.05),compensation by collateral circulation and prognosis(r=0.883,P＜0.05).Conclusion The combination of SWI and ASL provides accurate indications of the hemodynamic conditions around the infarction core in AIS patients,and it can accurately assess the prognosis of AIS patients,contributing valuable information for clinical diagnosis and the selection of treatment strategies.

OBJECTIVE To analyze the types and control measures of major microorganisms in pharmaceutical water systems, so as to provide guidance for effective control of pharmaceutical water systems. METHODS The main microbial species, abundance and harmfulness of drinking water, purified water and water for injection were reviewed, and the control measures on microorganisms in pharmaceutical water were discussed. RESULTS There were differences in the main microbial types in pharmaceutical water. Burkholderia cepacia complex and Ralstonia pickettii were conditioned pathogens in pharmaceutical water, thus causing certain biological safety hazards. CONCLUSION Pharmaceutical companies can strengthen the control of microorganisms in the water system by establishing microbial databases and common microbial strain banks at all levels. Trend analysis should to be conducted based on alert limits and action limits, so as to strengthen the control of microorganisms in the water system.

Objective:To examine the effect of short-term regular aerobic exercise on physical fitness of children with pulmonary with atresia ventricular septal defect after radical biventricular treatment.Methods:This was a prospective self pre-and post-control observation study. The subjects performed regular aerobic exercise for 10 days according to the exercise prescription. Body composition measurement and cardiopulmonary exercise test[lung ventilation function, maximum oxygen uptake(VO 2max), maximum oxygen pulse(O 2/HR max), ventilation oxygen uptake efficiency(OUES), exercise load time], 6 min walking distance(6MWD), sports psychometric test, motor function screening test and fitness test, were collected. The changes of test parameters and scale scoring before and after exercise were analyzed and compared. Results:A total of 7 children with PA/VSD after biventricular surgery were enrolled. The age ranged 8.2-16.2 years old, and there were 2 males and 5 females. VO 2max[(1 196.71±395.31)ml/min vs.(1 297.43±425.73)ml/min, P=0.031], O 2/HRmax[(82.43±7.53)ml/beat vs.(91.57±6.95)ml/beat, P<0.001]increased after exercise. The exercise load time was significantly increased compared with that before intervention[(476.43±35.73)s vs.(531.43±45.76)s, P=0.002]. Resting heart rate before exercise( P=0.013) and peak respiration exchange ratio(PeakRER, P=0.021) were significantly lower. Body composition tests suggest weight, intracellular water, protein and muscle content of lower limb were higher( P<0.05). The motor function score was higher than before( P=0.015); the score of sports fear was lower than before( P=0.009). There was no significant difference in lung capacity and 6-minute walking distance before and after exercise( P>0.05). There were no cardiovascular events during the study period. Conclusion:Short-term regular aerobic exercise for children with PA/VSD after biventricular surgery can improve exercise tolerance, increase lower limb muscle content, improve exercise fear and exercise function, and has good safety and feasibility.

Objective:To observe the neuroprotective effect of wind medicine (Puerariae Lobatue Radix and Acori Tatarinowii Rhizoma) in combination with Panax ginseng total saponin (PNS) on cerebral ischemia-reperfusion rats; To elucidate the mechanism of "wind medicine increasing effect".Methods:Totally 140 male SD rats were divided into sham-operation group, model group, PNS group, Puerariae Lobatue Radix group, Acori Tatarinowii Rhizoma group, Puerariae Lobatue Radix + PNS group, Acori Tatarinowii Rhizoma + PNS group according to the random number table method, with 20 rats in each group. Except for the sham-operation group, the cerebral ischemia/reperfusion rat model was established using the modified Longa line bolus method in the remaining groups. After 7 d of administration of the appropriate pharmacologic intervention in each group, neurological dysfunction was evaluated by Zea-longa score after final administration, cerebral infarct volume was determined by TTC staining; blood brain barrier (BBB) permeability of brain tissue on the ischemic side was detected by Evans blue content; BBB ultrastructure of each group of rats was observed by transmission electron microscopy; Claudin 5 protein expression level was detected by immunohistochemistry; Zonula occludens-1 (ZO-1), major facilitator supeffamily domain-containing protein 2a (Mfsd2a), Occludin, P-glycoprotein (P-gp), Monocarboxylate Transporters-1 (MCT1) and breast cancer resistance protein (BCRP) protein expression levels were detected by Western-blot.Results:Compared with the model group, the rat neurological function scores were reduced in each administration group ( P<0.05), infarct volume was reduced ( P<0.05), EB content of brain tissue decreased ( P<0.05), protein expressions of Claudin 5, ZO-1, Mfsd2a and Occludin in brain tissue were elevated ( P<0.05), the protein expressions of P-gp, BCRP and MCT1 were reduced ( P<0.05), and the protein expressions of Claudin 5, Mfsd2a, and Occludin was higher in the Puerariae Lobatue Radix + PNS group and Acori Tatarinowii Rhizoma + PNS group than that of each group of medication alone ( P<0.05), and the protein expression of MCT1 was lower than that of each group of medication alone ( P<0.05); the protein expression level of ZO-1 in the Puerariae Lobatue Radix + PNS group was higher than that of the group of medication alone ( P<0.05); P-gp protein expression was lower in Acori Tatarinowii Rhizoma + PNS group than in the PNS group and Acori Tatarinowii Rhizoma group ( P<0.05). Conclusion:Wind medicine (Puerariae Lobatue Radix and Acori Tatarinowii Rhizoma) may potentiate the neuroprotective effect of PNS on cerebral ischemia-reperfusion rats, and the mechanism may be related to the protection of BBB structural integrity and maintenance of central barrier properties, while regulating substance transport proteins and increasing the intracerebral content of the drug.

Age-related hearing loss(ARHL)is a common chronic disease that poses a serious threat to the physical and mental health of the elderly in an aging society.It is a sensorineural hearing loss characterized by the loss of auditory hair cells,stria vascularis lesions,apoptosis of spiral ganglia,and degeneration of the audi-tory central nervous system,reducing the quality of life of the patients.This article reviews the research progress in the relationship of ARHL with Alzheimer's disease,depression,and frailty,as well as the daily intervention in ARHL.This review aims to improve people's awareness and attention to the health hazards of ARHL and to delay the occurrence and development of ARHL by implementing daily intervention measures to form a healthy lifestyle.

IgA nephropathy (IgAN) is one common type of glomerulonephritis caused by a deposition of immune complexes in mesangium and partial capillary loops. It is also an important risk factor for end-stage renal disease (ESRD). Kidney transplantation (KT) has been an ultimate treatment for IgAN patients progressing into ESRD. However, there is still a high risk of recurrence after transplantation. Currently no effective treatment is available for recurrent IgAN. This review summarized the latest researches of managing IgAN recurrence after KT, such as optimal treatment, immunosuppression, complement therapy and surgery.

Objective:To investigate the effects of preoperative pre-rehabilitation on early functional recovery after knee arthroplasty under the multidisciplinary collaboration mode of accelerated rehabilitation surgery.Methods:The clinical data of 51 patients who underwent total knee arthroplasty in the Department of Orthopedics, Jinjiang Hospital from September 2019 to December 2021 were retrospectively analyzed. These patients were divided into an observation group ( n = 24) and a control group ( n = 27). The observation group received pre-rehabilitation before knee replacement surgery, while the control group did not. After completing the admission procedures, patients in the observation group underwent rehabilitation evaluation in the rehabilitation clinic and received individualized rehabilitation training. The control group did not undergo preoperative pre-rehabilitation but underwent the same individualized rehabilitation training as the observation group. The rehabilitation specialist evaluated the patients' rehabilitation scores [hospital for special surgery knee (HSS) score, visual analog scale (VAS) score] at 2 and 5 days after surgery. The main outcome measures included the range of motion (ROM) of the patient's knee joint at 2 and 5 days after surgery, HSS score at 2 and 5 days after surgery, VAS score at 5 days after surgery, the number of days from surgery to discharge, the incidence of postoperative complications, and the rate of outpatient visits after surgery. Results:There was no significant difference in postoperative ROM of the knee joint between the observation and control groups at 2 days after surgery ( P > 0.05). However, there was a significant difference in score of ROM of the knee joint at 5 days after surgery between the two groups [(100.08 ± 7.75) points vs. (88.44 ± 16.09) points, t = 3.34, P = 0.002]. There was no significant difference in HSS score between the two groups at 2 days after surgery ( P > 0.05). However, there was a significant difference in HSS score between the two groups at 5 days after surgery [(62.84 ± 5.78) points vs. (57.09 ± 6.53) points, t = 3.31, P = 0.002]. There was a significant difference in VAS score (exercise) between the two groups at 5 days after surgery [(3.42 ± 1.02) points vs. (5.37 ± 1.15) points, t = -6.39, P < 0.001]. There was no significant difference in the number of days from surgery to discharge between the two groups ( P > 0.05). There was no significant difference in the incidence of postoperative complications between the two groups ( P > 0.05). However, there was a significant difference in the rate of outpatient visits between the two groups [7/17 vs. 1/26, χ2 = 4.45, P = 0.035]. Conclusion:Preoperative pre-rehabilitation in the accelerated rehabilitation surgery model under multidisciplinary collaboration can help improve the early function of patients undergoing total knee arthroplasty, reduce the pain of postoperative rehabilitation, improve the postoperative rehabilitation compliance, and ultimately enhance patient satisfaction with the surgery.

Schizophrenia(SZ)is a serious mental illness,and traditional diagnostic methods are prone to missed and misdiagnosis.Using machine learning(ML)algorithms can extract SZ relative features from functional MRI(fMRI)data,hence being helpful for diagnosing and predicting treatment response of SZ.The research progresses of ML based on fMRI for diagnosis and treatment of SZ were reviewed in this article.