The value of CT-based radiomics in predicting hemorrhagic transformation in acute ischemic stroke patients without recanalization therapy.

Objective: The aim of this study is to investigate the clinical value of radiomics based on non-enhanced head CT in the prediction of hemorrhage transformation in acute ischemic stroke (AIS). Materials and methods: A total of 140 patients diagnosed with AIS from January 2015 to August 2022 were enrolled. Radiomic features from infarcted areas on non-enhanced CT images were extracted using ITK-SNAP. The max-relevance and min-redundancy (mRMR) and the least absolute shrinkage and selection operator (LASSO) were used to select features. The radiomics signature was then constructed by multiple logistic regressions. The clinicoradiomics nomogram was constructed by combining radiomics signature and clinical characteristics. All predictive models were constructed in the training group, and these were verified in the validation group. All models were evaluated with the receiver operating characteristic (ROC) curve, calibration curve, and decision curve analysis (DCA). Results: Of the 140 patients, 59 experienced hemorrhagic transformation, while 81 remained stable. The radiomics signature was constructed by 10 radiomics features. The clinicoradiomics nomogram was constructed by combining radiomics signature and atrial fibrillation. The area under the ROC curve (AUCs) of the clinical model, radiomics signature, and clinicoradiomics nomogram for predicting hemorrhagic transformation in the training group were 0.64, 0.86, and 0.86, respectively. The AUCs of the clinical model, radiomics signature, and clinicoradiomics nomogram for predicting hemorrhagic transformation in the validation group were 0.63, 0.90, and 0.90, respectively. The DCA curves showed that the radiomics signature performed well as well as the clinicoradiomics nomogram. The DCA curve showed that the clinical application value of the radiomics signature is similar to that of the clinicoradiomics nomogram. Conclusion: The radiomics signature, constructed without incorporating clinical characteristics, can independently and effectively predict hemorrhagic transformation in AIS patients.

Stroke risk study based on deep learning-based magnetic resonance imaging carotid plaque automatic segmentation algorithm.

Introduction: The primary factor for cardiovascular disease and upcoming cardiovascular events is atherosclerosis. Recently, carotid plaque texture, as observed on ultrasonography, is varied and difficult to classify with the human eye due to substantial inter-observer variability. High-resolution magnetic resonance (MR) plaque imaging offers naturally superior soft tissue contrasts to computed tomography (CT) and ultrasonography, and combining different contrast weightings may provide more useful information. Radiation freeness and operator independence are two additional benefits of M RI. However, other than preliminary research on MR texture analysis of basilar artery plaque, there is currently no information addressing MR radiomics on the carotid plaque. Methods: For the automatic segmentation of MRI scans to detect carotid plaque for stroke risk assessment, there is a need for a computer-aided autonomous framework to classify MRI scans automatically. We used to detect carotid plaque from MRI scans for stroke risk assessment pre-trained models, fine-tuned them, and adjusted hyperparameters according to our problem. Results: Our trained YOLO V3 model achieved 94.81% accuracy, RCNN achieved 92.53% accuracy, and MobileNet achieved 90.23% in identifying carotid plaque from MRI scans for stroke risk assessment. Our approach will prevent incorrect diagnoses brought on by poor image quality and personal experience. Conclusion: The evaluations in this work have demonstrated that this methodology produces acceptable results for classifying magnetic resonance imaging (MRI) data.

Acrocalyenes A and B, Two New Diterpenoids from Sinomenium acutum Associated Fungus Acrocalymma sp.

We identified two new diterpenoidal acrocalyenes A (1) and B (2) through chemical investigation on Acrocalymma sp., a plant-associated fungus from the tender stem isolates of Sinomenium acutum collected from the Qinling Mountains, along with seven already-recognized compounds (3-9). The HR-ESI-TOF-MS and 1D/2D NMR data were utilized for structural elucidation of these compounds, and the single-crystal X-ray diffraction was employed for absolute configuration clarification of the novel acrocalyenes 1 and 2. Bioassays revealed that the cytotoxicities of compounds 2, 4, 6, 7, and 8 against three human carcinoma cells (RKO, HeLa and HCC-1806) were moderate to strong, with IC50 between 6.70-38.82 µM. These isolates were also evaluated for their fungal resistant potentials against Botrytis cinerea, Fusarium culmorum and Fusarium solani, in which 3 displayed significant inhibitory effects on all three phytopathogenic fungi, showing respective MIC of 50, 25 and 25 µM.

lncRNA TPTEP1 inhibits stemness and radioresistance of glioma through miR­106a­5p­mediated P38 MAPK signaling.

Glioma is diagnosed as the most common intracranial malignant tumor. Cancer stem cells determine stemness and radioresistance, and may facilitate glioma recurrence. The present study aimed to investigate whether the long non­coding RNA (lncRNA) transmembrane phosphatase with tensin homology pseudogene 1 (TPTEP1) regulated cell stemness and radioresistance of glioma, and determine the underlying molecular mechanism of TPTEP1 in the modulation of glioma progression. Cell and molecular biology techniques were applied for investigating the role of TPTEP1 in glioma cell lines, animal model, and clinical samples. The results demonstrated that TPTEP1 attenuated stemness and radioresistance of glioma both in vitro and in vivo. In addition, TPTEP1 augmented MAPK14 expression by competitively interacting with microRNA (miR)­106a­5p, thus activating the P38 MAPK signaling pathway, and suppressing glioma stemness and radioresistance. TPTEP1 functionally bound to miR­106a­5p, which formed a reciprocal regulatory loop to stimulate the P38 MAPK signaling pathway. Low TPTEP1 expression levels were detected in high­grade glioma tissues compared with low­grade glioma tissues, and were positively associated with poor prognosis of patients with glioma. Furthermore, analysis using data from The Cancer Genome Atlas database confirmed the molecular mechanism and biological significance of dysregulation of TPTEP1 in glioma progression. Taken together, the results of the present study suggest that TPTEP1 may be applied as a diagnostic and prognostic indicator for glioma, and may be an alternative target for the treatment of glioma.

[Effects of butylphthalide on microglia activation in frontal lobe of rats after chronic sleep deprivation].

Objective: To evaluate the effects of butylphthalide on microglia activation and inflammatory factors in frontal lobe of rats after chronic sleep deprivation. Methods: Rats were divided into four groups(n＝8): control group, platform group, chronic sleep deprivation group and butylphthalide intervention group. Chronic sleep deprivation was performed in rats of chronic sleep deprivation group and butylphthalide intervention group for 18 h per day using the multiple platforms method, and sleep deprivation lasted for 28 days. At the same time, rats in platform group were put in platform, while rats in control group were in normal sleep. After 28 days of sleep deprivation, rats in butylphthalide intervention group were intraperitoneally injected with butylphthalide 100 mg/kg for 14 days, meanwhile rats in other groups were intraperitoneally injected with saline. Then brains were collected and ionized calcium binding adaptor molecule-1 (Iba-1) positive cells in cortex in frontal lobe were studied and counted. The expressions of inducible nitric oxide synthase (iNOS) and arginase1 (Arg1) in frontal lobe were detected by Western blot, and the mRNA levels of interleukin-1 (IL-1), IL-6, tumor necrosis factor-α (TNF-α) were determined by real-time PCR. Results: Compared with control or platform group, the Iba-1 positive cells in chronic sleep deprivation group were large with long process, and increased cell counts were also found in the chronic sleep deprivation group (all P＜0. 05). Moreover, the mRNA expression levels of iNOS, IL-1, IL-6, TNF-α were increased, while the expression of Arg1 was decreased in frontal lobe in rats of the chronic sleep deprivation group compared with the control or platform group (all P＜0. 05). The Iba-1 positive cells in butylphthalide intervention group were reduced compared with chronic sleep deprivation group (P＜0. 05). And the mRNA expression levels of iNOS, IL-1, IL-6 and TNF-α were decreased, while the expression of Arg1 did not chang in rats of the butylphthalide intervention group compared with the chronic sleep deprivation group (all P＜0. 05). Conclusion: Butylphthalide might inhibit the activation and decrease the inflammatory factors in frontal lobe of rats after chronic sleep deprivation.

[The effects of prenatal radiation of mobile phones on white matter in cerebellum of rat offspring].

OBJECTIVE: To evaluate the effects of prenatal radiation of 850～1 900 MHz mobile phone on white matter in cerebellum of adult rat offspring. METHODS: Pregnant rats were randomly divided into short term maternal radiation group, long term maternal radiation group and control group. Rats in short term and long term maternal radiation group were exposed to 6 h/d and 24 h/d mobile phone radiation during 1-17 days of pregnancy, respectively. The cerebellums of offspring rats at the age of 3 month(n＝8)were taken. Cell morphology in cerebellum was studied by hematoxylin-eosin (HE) staining. The expressions of myelin basic protein (MBP), neurofilament-L (NF-L) and glial fibrillary acidic protein (GFAP) in cerebellum of rat offspring were detected by immunohistochemistry and Western blot. RESULTS: Compared to control group, the morphological changes of purkinje cells in cerebellum were obvious in rat offspring of short term and long term maternal radiation group. Compared to control group, decreased MBP and NF-L expressions and increased GFAP expression were observed in long term maternal radiation group(all P＜0.05). Compared to short term radiation group, the expressions of MBP and NF-L were down-regulated (all P＜0.05) and the expression of GFAP was up- regulated(P＜0.05) in long term radiation group. CONCLUSION: Prenatal mobile phone radiation might lead to the damage of myelin and axon with activity of astrocytes in cerebellum of male rat offspring, which is related to the extent of radiation.

Spinal Cord Syphilitic Gumma Presenting with Brown-Séquard Syndrome: A Case Report and Literature Review.

BACKGROUND: Spinal neurosyphilis manifesting as a solitary syphilitic gumma is exceedingly rare. There are non-specific imaging findings and challenges in the diagnosis of spinal syphilitic gumma, which could be easily misdiagnosed as tumor lesions and require surgical resection or biopsy. CLINICAL PRESENTATION: We report the case of a 45-year-old female patient who was diagnosed with Spinal syphilitic gumma. Our case is the first reported case of spinal cord syphilitic gumma with intradural-extramedullary and intramedullary involvement. CONCLUSION: Spinal syphilitic gumma exhibits diverse clinical manifestations, lacks specific imaging features, accompanied by the patient's history deliberately concealed. Since clinicians do not have sufficient knowledge about such rare cases, misdiagnosis and missed diagnosis will be likely. When there is clinical suspicion for spinal syphilitic gumma, clinicians should pay close attention to relevant medical history, carry out a comprehensive physical examination and specific serological tests and cerebrospinal fluid (CSF) analysis. In summary, in cases with stable neurologic conditions, a trial administration of intravenous penicillin with follow-up imaging may be the optimal treatment option, and in cases with rapid progression or acute exacerbation, a surgical resection together with systemic antibiotic treatment for syphilis after surgery may be the best treatment strategy.

Antifungal Indole Alkaloids from Winchia calophylla.

Ten indole alkaloids (1-10) were obtained from an antifungal extract of Winchia calophylla, of which two (2 and 4) were new. N(4)-Methyl-10-hydroxyl-desacetylakuammilin (2) was an akuammiline-type indole alkaloid. N(1)-Methyl-echitaminic acid (4) was an unusual zwitterion with a basic vincorine-type skeleton. This is the first report of 10 in W. calophylla. The structures of all of the compounds were determined based on spectroscopic data, and their bioactivities were assessed. Compound 1 showed potent activity against the plant pathogenic fungi of Penicillium italicum and Fusarium oxysporum f.sp cubens with IC50 s of 10.4 and 11.5 µM, respectively, and 3 inhibited Rhizoctonia solani with an IC50 of 11.7 µM. Compounds 2 and 4 showed weak cytotoxicity against the human leukemic cell line HL-60 in vitro with IC50 s of 51.4 and 75.3 µM, respectively. Compounds 1 and 2 displayed weak activity against acetylcholinesterase with IC50 s around 61.3 and 52.6 µM, respectively.

Association of Apolipoprotein A1, B with Stenosis of Intracranial and Extracranial Arteries in Patients with Cerebral Infarction.

BACKGROUND: To investigate the distribution of stenosis of intracranial and extracranial arteries of Han population patients suffering from cerebral infarction in the city of Quanzhou in Fujian and to determine the correlation of apolipoprotein A1 and apolipoprotein B with intracranial and extracranial atherosclerosis stenosis. METHODS: For this study, we enrolled patients with cerebral infarction between December 2009 and October 2012 at the Neurology Department of The Second Affiliated Hospital of Fujian Medical University. All patients were examined by computed tomography angiography (CTA). Past medical history, demographic data, and biochemical markers were collected. Multiple logistic regression analysis was used to study the association between apo A1, apo B, and cerebral atherosclerosis stenosis. RESULTS: A total of 412 patients were included in this study. 137 cases (33.3%) were classified as the intracranial atherosclerosis stenosis (ICAS) group, 74 cases (18.0%) as the combined intracranial and extracranial atherosclerosis stenosis (COAS) group, 44 cases (0.7%) as the extracranial atherosclerosis stenosis (ECAS) group, and 157 cases (38.1%) as the non-cerebral atherosclerosis stenosis (NCAS) group. Middle cerebral arteries (43.8%) were the most common lesions of intracranial arterial atherosclerosis stenosis. Extracranial carotid stenosis (30.7%) were more likely to be stenoses in the extracranial internal carotid arteries. Compared with the NCAS group, apo B was significantly higher (p < 0.001), apo A1 was significantly lower in the ICAS group and COAS group (p = 0.02 and p = 0.030). Compared with the mild atherosclerosis stenosis group, apo B was higher in the severe extracranial atherosclerosis stenosis group (p = 0.03), apo A1 was lower in the severe intracranial atherosclerosis stenosis group (p < 0.001). The multiple logistic regression analyses showed that when apo A1 > 1.28 g/L, it was an independent protective factor of intracranial stenosis (OR, 0.39), apo B was an independent risk factor of the cerebral atherosclerosis stenosis group, and when apo B > 1.16, it is significantly associated with the cerebral atherosclerosis stenosis group (ICAS: OR, 6.41) (ECAS: OR, 5.15). CONCLUSIONS: 1. The occurrence of atherosclerosis stenosis in intracranial arteries is more frequent than that in extracranial arteries in population with cerebral infarction; 2. Apo B is an independent risk factor of intracranial and extracranial arterial stenosis, apo A1 is associated with the degree of intracranial stenosis and an independent protector of intracranial stenosis.

Dipyridamole treatment is associated with improved renal outcome and patient survival in advanced chronic kidney disease.

Dipyridamole has been shown to decrease proteinuria and improve renal function progression especially in early chronic kidney disease (CKD) patients with glomerulonephropathy. A combination therapy of dipyridamole with aspirin could prevent second strokes in the general population. Whether these effects of dipyridamole are also true in advanced CKD patients and whether dipyridamole could improve renal outcomes or patient survival is unknown. We retrospectively analyzed an observational cohort of 3074 participants with CKD stage 3-5 from southern Taiwan, of whom 871 (28.3%) had received dipyridamole treatment ≥50 mg/d for ≥3 months and more than half of the observation period. The mean age was 63.6 ± 13.4 years and the mean estimated glomerular filtration rate (eGFR) was 25.5 mL/min/1.73 m(2). After inverse probability of treatment weighted adjustment by propensity score, there were no differences between the dipyridamole-treated and untreated groups. Dipyridamole treatment was associated with decreased odds for rapid eGFR decline [odds ratio, 0.755; 95% confidence interval (CI), 0.595-0.958; p = 0.007] and progression of urine protein-to-creatinine ratio (odds ratio, 0.655; 95% CI, 0.517-0.832; p = 0.002). In survival analysis, the dipyridamole-treated group was also associated with a decreased risk for end-stage renal disease (hazard ratio, 0.847; 95% CI, 0.733-0.980; p = 0.011) and all-cause mortality (hazard ratio, 0.765; 95% CI, 0.606-0.971; p = 0.001) but not for cardiovascular events. Our findings demonstrate that dipyridamole treatment is significantly associated with better renal outcomes and patient survival in patients with CKD stage 3-5. Further investigations are warranted to confirm these independent positive effects.

Factors influencing clinical outcomes of acute ischemic stroke treated with intravenous recombinant tissue plasminogen activator.

BACKGROUND: Thrombolysis with recombinant tissue plasminogen activator (rt-PA) has gained international recognition, clinical outcomes following this thrombolytic therapy varied from patient to patient. Factors affecting clinical outcomes have not been well understood yet, so this retrospective case-control study aimed to investigate factors that may influence clinical outcomes of acute ischemic stroke treated with intravenous rt-PA. METHODS: One hundred and one patients with acute ischemic stroke who received intravenous rt-PA thrombolysis within 4.5 hours from disease onset were included. Patients were divided into good or poor outcome group according to modified Rankin Scale (mRS) score, good outcome group: mRS score of 0-1; poor outcome group: mRS of 2-6. Stroke characteristics were compared between the two groups. Factors for stroke outcomes were analyzed via univariate analysis and Logistic regression. RESULTS: Of the 101 patients studied, patients in good outcome group (n = 55) were significantly younger than patients in poor outcome group (n = 46, (62.82 ± 14.25) vs. (68.81 ± 9.85) years, P = 0.029). Good outcome group had fewer patients with diabetic history (9.09% vs. 28.26%, P = 0.012), fewer patients with leukoaraiosis (7.27% vs. 28.26%, P = 0.005) and presented with lower blood glucose level ((5.72 ± 1.76) vs. (6.72 ± 1.32) mmol/L, P = 0.012), lower systolic blood pressure level ((135.45 ± 19.36) vs. (148.78 ± 19.39) mmHg, P = 0.003), lower baseline NIHSS score (12.02 ± 5.26 vs. 15.78 ± 4.98, P = 0.002) and shorter onset-to-treatment time (OTT) ((2.38 ± 1.21) vs. (2.57 ± 1.03) hours, P = 0.044) than poor outcome group. Logistic regression analysis showed that absence of diabetic history (odds ratio (OR) 0.968 (95% CI 0.941-0.996)), absence of leukoaraiosis (OR 0.835 (95% CI 0.712-0.980)), lower baseline NIHSS score (OR 0.885 (95% CI 0.793-0.989)), lower pre-thrombolysis systolic blood pressure (OR 0.962 (95% CI 0.929-0.997)), and lower blood glucose level (OR 0.699 (95% CI 0.491-0.994)) before thrombolysis were significantly associated with better outcome. CONCLUSION: Patients with no history of diabetes, no leukoaraiosis, low blood glucose level, low systolic blood pressure level and low baseline NIHSS score before thrombolysis have a better outcome.

Primary Sjögren's syndrome with minimal change disease--a case report.

Glomerular involvement in patients with primary Sjögren's syndrome (pSS) has rarely been reported. Among them, membranoproliferative glomerulonephritis and membranous nephropathy are the more common types. We report a middle-aged female presenting concurrently with nephrotic syndrome and microscopic hematuria, and her pSS was diagnosed by positive anti-Ro (SSA)/anti-La (SSB) autoantibodies, dry mouth, severely diffuse impaired function of both bilateral parotid and submandibular glands, and a positive Schirmer test. Renal pathology revealed minimal change disease and thin basement membrane nephropathy. The patient's nephrotic syndrome resolved after treatment with corticosteroids. To our knowledge, this is the first report of minimal change disease in a patient with pSS.

Case report: infective endocarditis caused by Brevundimonas vesicularis.

BACKGROUND: There are few reports in the literature of invasive infection caused by Brevundimonas vesicularis in patients without immunosuppression or other predisposing factors. The choice of antimicrobial therapy for bacteremia caused by the pathogen requires more case experience to be determined. CASE PRESENTATION: The case of a 40-year-old previously healthy man with subacute endocarditis proposed to be contributed from an occult dental abscess is described. The infection was found to be caused by B. vesicularis on blood culture results. The patient recovered without sequelae after treatment with ceftriaxone followed by subsequent ciprofloxacin therapy owing to an allergic reaction to ceftriaxone and treatment failure with ampicillin/sulbactam. CONCLUSION: To our knowledge, this is the first report of B. vesicularis as a cause of infective endocarditis. According to an overview of the literature and our experience, we suggest that third-generation cephalosporins, piperacillin/tazobactam, and ciprofloxacin are effective in treating invasive B. vesicularis infections, while the efficacy of ampicillin-sulbactam needs further evaluation.