AIM　To determine whether ONO-1078 {pranlukast, 4-oxo-8-［p-(4-phenylbutyloxy) benzoyl-amino]-2-(tetrazol-5-yl)-4H-1-benzopyran hemihydrate}, a potent leukotriene antagonist, has protective effect on focal cerebral ischemia in mice. METHODS　Focal cerebral ischemia was induced by permanent middle cerebral artery (MCA) occlusion in mice. ONO-1078 (0.01, 0.05, 0.10 mg*kg-1), dexamethasone (0.5 mg*kg-1), nimodipine (0.2 mg*kg-1) or saline (control) were injected ip once daily for 3 days, and 30 min before MCA occlusion. Twenty-four hours after cerebral ischemia, the neurological scores were evaluated, infarct volumes and areas of the right and left cerebral hemispheres were measured by computer imaging analysis. RESULTS　ONO-1078, dexamethasone and nimodipine reduced the neurological scores. ONO-1078 and dexamethasone reduced the ratio of right/left hemisphere area, indicating inhibition of brain edema, while nimodipine showed no effect. ONO-1078 dose-dependently reduced infarct size, and dexamethasone and nimodipine showed the same effect. CONCLUSION　ONO-1078 showed protective effect on focal cerebral ischemia. This may represent a novel approach to the treatment of acute cerebral ischemia.

Autophagy,an intracellular d egradative pathway,mediates the degradation of long-lived proteins and some cellular organelles and thus plays crucial physiological role in the maintenance of neuronal homeostatsis. The intracellular and extracellular accumulation of protein aggregates is a common pathological alternation in various neurodegenerative disorders. The long and thin axons and dendrites (or collectively “neurites”) are particularly vulnerable to the accumulation of protein aggregates and damaged cellular organelles. Synaptic damage,axonal terminal degeneration,and neuritic atrophy are frequently found in the early stage of neurodegenerative diseases. Therefore, efficient clearance of protein aggregates and damaged cellular organelles by autophagic pathway may suppress neuritic degeneration. However, it is also demonstrated that insufficient autophagy or excessive autophagic activation contributes to neuritic injury. Here,the recent advances in the study of neuritic autophagy have been reviewed. We firstly introduce the biogenesis and transport of autophagosomes in neurites. Secondly,the regulatory role of autophagy in neuritic growth and damage is reviewed. Finally,the association between autophagy and neurodegenerative diseases is discussed.

OBJECTIVETo examine the spatiotemporal profiles and localization of CysLT1R, CysLT2R and GPR17 in mice with 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine (MPTP)-induced Parkinson disease (PD).

METHODSPD model was induced by subcutaneous injection of MPTP (25 mg/kg) for 5 d in adult male C57BL/6 mice. At d10 after MPTP injection, the expression and cellular localization of CysLT1R, CysLT2R and GPR17 in the substantia nigra were detected by immunohistochemistry and immunofluorescence.

RESULTSCysLT1R, CysLT22 and GPR17 were normally localized in TH-positive dopaminergic neurons and microglia, while CysLT2R was also expressed in astrocytes. In dopaminergic neurons, approximately 91% co-expressed GPR17, 77% co-expressed CysLT1R and 52% co-expressed CysLT2R. Compared with the control group, TH-positive cells in the substantia nigra were significantly reduced in PD mice. CysLT1R, CysLT2R and GPR17-positive cells were significantly reduced; and CysLT1R, CysLT2R, GPR17-positive dopaminergic neurons were also significantly reduced in the PD group. In the striatum, both CysLT1R and GPR17 were normally expressed in neurons; whereas CysLT2R was expressed in astrocytes. In PD striatum, CysLT1R and GPR17-positive cells were decreased, but CysLT2R expression was significantly increased which mainly expressed in the proliferating astrocytes.

CONCLUSIONCysLT1R, CysLT2R and GPR17 may be involved in the MPTP-induced PD damage in mice.

Animals ; Brain ; metabolism ; Disease Models, Animal ; Male ; Mice ; Mice, Inbred C57BL ; Nerve Tissue Proteins ; metabolism ; Parkinson Disease ; metabolism ; Receptors, G-Protein-Coupled ; metabolism ; Receptors, Leukotriene ; metabolism

Objective:To study the effect of automatic analysis system of infrared spectrum on the composition analysis of calculus of patients with calculus in urology department and on postoperative prevention of recurrence for patients.Methods:A total of 300 patients with calculus at upper urinary tract,kidney and ureter,who received surgical treatment in the Department of Urology of the Hospital of Suixi County from January 2021 to April 2023,were selected as the study objects.The automatic analysis system of the calculus of infrared spectrum was adopted to analyze the composition for the calculus of all patients,and the analysis results of calculus were combined to conduct targeted postoperative health intervention guidance,which aimed to reduce the postoperative recurrence rate.Results:The calculary composition of 300 patients showed that the number of cases with calcium oxalate monohydrate was the most,with a proportion of 67%,and followed by the cases with phosphate ash carbonate and calcium oxalate dihydrate,with proportions of 16.67%and 10%,respectively.After the analysis of calculus composition of all patients,this study combined with specific result to conduct targeted intervention guidance after surgery.In all patients,7 cases occurred recurrence at the 3rd month after surgery,which recurrent rate was 2.33%,and 10 cases occurred recurrence at the 6th month after surgery,which recurrent rate was 3.33%.A total of 12 cases occurred recurrence at the 12th month after surgery,which recurrent rate was 4%.Overall,the recurrence rates of different time stages were lower.Conclusion:Adopting automatic analysis system of infrared spectrum to conduct analysis for patients with urinary calculus can quickly and accurately analyze the composition of calculus of urinary tract.The targeted health guidance strategies combined with the compositions and properties of calculus for patients can decrease the recurrence rate of urinary calculus.This system can be widely used in department of clinical urology.

OBJECTIVE: : To determine the effects of cysteinyl leukotriene receptors (CysLTR and CysLTR) on phagocytosis of mouse BV2 microglial cells. METHODS: : BV2 cells were stimulated with microglial activators lipopolysaccharide (LPS) or CysLT receptor agonists LTD. The phagocytosis of BV2 cells was observed by immunofluorescence analysis and flow cytometry. The intracellular distributions of CysLTR and CysLTR in BV2 cells were examined with immunofluorescence staining. RESULTS: : Both LPS and LTD could significantly enhance the phagocytosis of BV2 cells, and such effect could be inhibited by CysLTR selective antagonist Montelukast and CysLTR selective antagonist HAMI 3379. The activation of BV2 cells induced by LTD or LPS resulted in changes in intracellular distributions of CysLTR and CysLTR. CysLTR and CysLTR was co-localization with a similar distribution. CONCLUSIONS : CysLTR and CysLTR regulate the phagocytosis of mouse BV2 microglial cells with a synergistic effect.
Acetates ; pharmacology ; Animals ; Cell Line ; Cyclohexanecarboxylic Acids ; pharmacology ; Lipopolysaccharides ; pharmacology ; Mice ; Microglia ; cytology ; Phagocytosis ; drug effects ; Phthalic Acids ; pharmacology ; Protein Binding ; drug effects ; Quinolines ; pharmacology ; Receptors, Leukotriene ; agonists ; metabolism