Objective To investigate MRI appearances of aquaporin(AQP) and its effect in different brain regions of patients with Parkinson's disease(PD).Methods A prospective study was carried out in 33 PD patients(PD group) and 23 gender-and age-matched healthy controls (control group).Clinical data of PD patients were collected.The aquaporin imaging of diffusion-weighted magnetic resonance imaging (MRDWI) with multiple b-values in different brain regions were performed to detect the apparent diffusion coefficient(AQP-ADC) values of aquaporin.The PD patients were assessed and graded by modified Hoehn-Yahr grading,then the AQP-ADC values of control group,mild PD group,moderate and severe PD group were analyzed using one-way analysis of variance.The correlation analysis was carried out to detect the relationship between AQP-ADC values in different brain regions and Hoehn-Yahr grading of PD patients.Results Compared with control group,mild PD group had significantly higher AQP-ADC values in red nucleus(RN) and globus pallidus(GP) ((0.24±0.04) vs (0.21±0.04),(0.21±0.04) vs (0.16±0.04);both P＜0.05);while the AQP-ADC values in RN and GP of moderate and severe PD group were significantly lower than that of mild PD group((0.21±0.02) vs (0.24±0.04),(0.18±0.03) vs (0.21±0.04);both P＜0.05);but there was no significant difference between moderate and severe PD group and control group(P＞0.05);and there was also no significant difference in substantianigra (SN),putamen (Pu) and thalamus (THA) among control group,mild PD group and moderate and severe PD group(P＞0.05).The correlation analysis showed that there were negative correlations between the AQP-ADC values in RN and GP and Hoehn-Yahr grading(r=-0.479 and-0.395,P＜ 0.05),while there was no correlation in SN,Pu and THA (P＞ 0.05).Conclusion The AQPADC values are increased in RN and GP of mild PD patients,and decreased in moderate and severe PD patients,while there is no significant change in SN,Pu and THA of the two groups,suggesting that the expression of AQP in different brain regions may be related to the severity and pathological stage of PD.

Objective To explore the efficacy and safety of antiplatelet therapy in patients with acute ischemic stroke(AIS)complicated with gastric cancer.Methods Clinical data of 89 patients with AIS complicated with gastric cancer who were hospitalized in the First People's Hospital of Huzhou from January 2018 to October 2022 were retrospectively analyzed.The patients were divided into treatment group(59 cases)and untreated group(30 cases)according to whether they received antiplatelet therapy or not,and the clinical characteristics and prognosis of the two groups were compared.To analyze the clinical features and influencing factors of gastrointestinal bleeding complicated by antiplatelet therapy in AIS patients with gastric cancer.Results The patients in treatment group were younger than those in untreated group,and had more history of antiplatelet therapy,hypertension and cardiovascular disease,the difference was statistically significant(P<0.05).The National Institute of Health stroke scale(NHISS)and modified Rankin scale(mRs)of patients in treatment group were lower than those in untreated group after antiplatelet therapy,the difference was statistically significant(P<0.05).The incidence of bleeding in treated group was significantly higher than that in untreated group(P<0.05),most of the patients had mild hemoglobin decline.Multivariate Logistic analysis suggested that chronic renal insufficiency,gastric cancer lesion diameter≥2cm and T1-T2 stage are risk factors for gastrointestinal bleeding in AIS patients with gastric cancer after taking aspirin for antiplatelet therapy.Conclusion In AIS patients with gastric cancer,aspirin antiplatelet therapy can effectively improve cerebrovascular function and reduce the degree of brain nerve damage.However,when these patients are combined with T1-T2 stage,chronic renal insufficiency and gastric cancer lesion diameter≥2cm,gastrointestinal bleeding is easy to occur.