Mannitol inhibits the proliferation of neural stem cell by a p38 mitogen-activated protein kinase-dependent signaling pathway / 中华创伤杂志(英文版)

PURPOSE@#Mannitol is one of the first-line drugs for reducing cerebral edema through increasing the extracellular osmotic pressure. However, long-term administration of mannitol in the treatment of cerebral edema triggers damage to neurons and astrocytes. Given that neural stem cell (NSC) is a subpopulation of main regenerative cells in the central nervous system after injury, the effect of mannitol on NSC is still elusive. The present study aims to elucidate the role of mannitol in NSC proliferation.@*METHODS@#C57 mice were derived from the animal house of Zunyi Medical University. A total of 15 pregnant mice were employed for the purpose of isolating NSCs in this investigation. Initially, mouse primary NSCs were isolated from the embryonic cortex of mice and subsequently identified through immunofluorescence staining. In order to investigate the impact of mannitol on NSC proliferation, both cell counting kit-8 assays and neurospheres formation assays were conducted. The in vitro effects of mannitol were examined at various doses and time points. In order to elucidate the role of Aquaporin 4 (AQP4) in the suppressive effect of mannitol on NSC proliferation, various assays including reverse transcription polymerase chain reaction, western blotting, and immunocytochemistry were conducted on control and mannitol-treated groups. Additionally, the phosphorylated p38 (p-p38) was examined to explore the potential mechanism underlying the inhibitory effect of mannitol on NSC proliferation. Finally, to further confirm the involvement of the p38 mitogen-activated protein kinase-dependent (MAPK) signaling pathway in the observed inhibition of NSC proliferation by mannitol, SB203580 was employed. All data were analyzed using SPSS 20.0 software (SPSS, Inc., Chicago, IL). The statistical analysis among multiple comparisons was performed using one-way analysis of variance (ANOVA), followed by Turkey's post hoc test in case of the data following a normal distribution using a Shapiro-Wilk normality test. Comparisons between 2 groups were determined using Student's t-test, if the data exhibited a normal distribution using a Shapiro-Wilk normality test. Meanwhile, data were shown as median and interquartile range and analyzed using the Mann-Whitney U test, if the data failed the normality test. A p < 0.05 was considered as significant difference.@*RESULTS@#Primary NSC were isolated from the mice, and the characteristics were identified using immunostaining analysis. Thereafter, the results indicated that mannitol held the capability of inhibiting NSC proliferation in a dose-dependent and time-dependent manner using cell counting kit-8, neurospheres formation, and immunostaining of Nestin and Ki67 assays. During the process of mannitol suppressing NSC proliferation, the expression of AQP4 mRNA and protein was downregulated, while the gene expression of p-p38 was elevated by reverse transcription polymerase chain reaction, immunostaining, and western blotting assays. Subsequently, the administration of SB203580, one of the p38 MAPK signaling pathway inhibitors, partially abrogated this inhibitory effect resulting from mannitol, supporting the fact that the p38 MAPK signaling pathway participated in curbing NSC proliferation induced by mannitol.@*CONCLUSIONS@#Mannitol inhibits NSC proliferation through downregulating AQP4, while upregulating the expression of p-p38 MAPK.

A case report of heat stroke with early severe brain edema / 环境与职业医学

Heat stroke can be divided into two types: exertional and classic, mainly manifested as a clear history of exposure to hot temperature/high heat environment or intense physical activity in hot environment, core temperature exceeding 40 ℃, accompanied by central nervous system changes (altered consciousness, epilepsy, psychiatric symptoms, etc.) and multiple organ damage, including respiratory failure, impaired liver and kidney function, rhabdomyolysis, coagulation disorders, abdominal distension, and diarrhea. Its pathology may be manifested as organ endothelial cell damage, inflammatory response, extensive thrombosis, and bleeding tendency. The main treatment measures are cooling therapy, and when combined with other organ damage, organ support or replacement therapy should be carried out in time, including blood transfusion to improve coagulation function and blood purification therapy. Hyperbaric oxygen therapy may improve the prognosis of patients with ischemic hypoxic encephalopathy. We reported a case of a firefighter with sudden impaired consciousness and high fever during forest fire fighting. The patient was sent to a local hospital and his head computed tomography (CT) results showed unclear cerebral gyrus, suggesting severe cerebral edema, and finally diagnosed as heat stroke. After being transferred to Liuzhou Workers' Hospital, his condition continued to deteriorate and signs of multiple organ failure appeared. The patient's cerebral edema was reversed and further development of heat stroke was prevented through early cooling, sedation and anti-epilepsy, endotracheal intubation ventilator-assisted breathing, anti-infection, fluid resuscitation, infusion of fresh frozen plasma and platelets to improve coagulation function, immunomodulatory therapy, renal replacement therapy, and timely artificial liver therapy. Hyperbaric oxygen therapy was ordered during the rehabilitation phase, and the patient recovered well at discharge, leaving no obvious neurological sequelae. Its prognosis is much better than that predicted at admission.

Establishment and validation of a nomogram model for predicting malignant cerebral edema in elderly patients with acute large hemispheric infarction of the anterior cerebral artery / 中华老年医学杂志

Objective:To construct and validate a predictive model for the occurrence of malignant cerebral edema(MCE)in the elderly with acute large hemispheric infarction(LHI)of the anterior cerebral artery.Methods:Clinical, laboratory and imaging data of 301 elderly patients with acute LHI of the anterior cerebral artery admitted to the Department of Neurology of the Third Affiliated Hospital of Soochow University between January 2018 and April 2023 were retrospectively analyzed.Patients were divided into a modeling group(211 cases)and a validation group(90 cases)by the simple random sampling method with a ratio of 7∶3.According to the occurrence of MCE, univariate and multivariate Logistic regression analyses were performed with data from the modeling group to screen for independent predictors of the development of MCE.Nomograms were created and internally validated using R software.Additionally, external validation was performed with data from the validation group, and the performance of the model was assessed by receiver operating characteristic(ROC)curves, calibration plots, and clinical decision curve analysis(DCA), respectively.Results:The MCE incidence and baseline data between the modeling and validation groups were not statistically significantly different and were actually comparable.Multivariate Logistic analysis in the modeling group showed that a history of atrial fibrillation( OR=3.459, 95% CI: 1.202-9.955, P=0.021), Acute Physiology and Chronic Health Evaluation Ⅱ(APACHE Ⅱ)score( OR=1.202, 95% CI: 1.052-1.373, P=0.007), National Institutes of Health Stroke Scale(NIHSS)score( OR=1.163, 95% CI: 1.039-1.3013, P=0.008), Alberta Stroke Program Early CT Score(ASPECTS)( OR=0.782, 95% CI: 0.639-0.958, P=0.018), and collateral score(CS)( OR=0.414, 95% CI: 0.221-0.777, P=0.006)were independent predictors of the occurrence of MCE in the elderly patients with LHI.Based on the nomogram model constructed using the independent predictors, the ROC value for the risk of developing MCE was 0.912(95% CI: 0.867-0.957)in the modeling group and 0.957(95% CI: 0.902-0.997)in the validation group.The predicted probabilities from the nomograms in the modeling and validation groups were close to the actual probabilities, indicating good calibration.The DCA curves in the validation group showed that the predictive model had good clinical utility. Conclusions:The nomogram model established in this study exhibits good discrimination and calibration for the prediction of MCE, and has some predictive value.

Occurrence of hypopituitarism after severe craniocerebral trauma and its predictors / 中华内分泌外科杂志

Objective:To investigate the occurrence and predictors of hypopituitarism after traumatic brain injury (TBI) .Methods:A prospective study was conducted on 185 patients with severe TBI in the Emergency Department of the First Hospital of Shanxi Medical University from Jan. 2020 to May. 2022, of whom 108 were male and 77 were female; age ranged from 18 to 79 years, mean (51.32±9.34) years. Pituitary function was assessed within 3-7 d after the onset of TBI, and the occurrence of hypopituitarism after severe TBI was counted. 41 cases in the hypopituitarism group, 26 males and 15 females, aged (52.76±9.83) years, were divided into the hypopituitarism group (hypopituitarism occurred) and the non-hypopituitarism group (hypopituitarism did not occur) according to whether hypopituitarism occurred. In the non-decompensated group, there were 144 cases, 82 males and 62 females, aged (50.91±9.27) years. The clinical data of the decompensated and non-decompensated groups were compared, and the factors influencing the occurrence of hypopituitarism were analysed, and a logistic prediction model was constructed based on the relevant influencing factors. The value of this model in predicting the occurrence of hypopituitarism after severe TBI was evaluated by using the receiver operating characteristic (ROC) curve.Results:The prevalence of hypopituitarism in the 185 patients with severe TBI in this study was 22.16%; the Glasgow coma scale (GCS) score on admission was lower in the decompensated group than in the non-decompensated group [ (6.36±1.04) vs (7.48±0.59) ], the percentage of hyperbaric oxygen therapy was lower than in the non-decompensated group (21.95% vs 49.31%) , the percentage of intracranial pressure (82.93% vs 49.31%) , midline displacement ≥5 mm (78.05% vs 29.86%) , skull base fracture (34.15% vs. 17.36%) , diffuse cerebral edema (19.51% vs 4.17%) , and serum brain derived neurophic factor (BDNF) . Brain derived neurophic factor (BDNF) was higher than that in the non-reduced group [ (6.35±1.29) ng/ml vs (4.51±1.06) ng/ml], and neuronal-specific enolase (NSE) was higher than that in the non-reduced group [ (33.06±5.42) μg/L vs (23.15±4.97) μg/L]. (4.97) μg/L]. Vascular epithelial growth factor (VEGF) was higher than that in the non-reduced group [ (312.07±24.35) pg/ml vs (226.80±20.96) pg/ml], tumor necrosis factor-α (TNF-α) was higher than that in the non-reduced group [ (281.24±38.91) ng/L vs (186.91) pg/ml], and tumor necrosis factor-α (TNF-α) was higher than that in the non-reduced group (186.55±35.72) ng/L (all P<0.05) . Increased intracranial pressure, midline displacement ≥5 mm, diffuse cerebral edema, serum BDNF, NSE, VEGF, and TNF-α levels were all independent risk factors for the development of hypopituitarism after severe TBI, with admission GCS score and hyperbaric oxygen therapy as protective factors ( P<0.05) ; a logistic prediction model was constructed based on the influencing factors as: Logit ( P) = 5.264-0.880×admission GCS score + 1.618×increased intracranial pressure + 1.941×midline displacement ≥5 mm + 1.289×diffuse cerebral edema+1.306×BDNF+1.426×NSE+1.781×VEGF+1.615×TNF-α-0.758×hyperbaric oxygen therapy; the model predicted the occurrence of severe TBI after the area under the curve (AUC) of hypopituitarism was 0.930 (95% CI 0.883-0.962) , with a predictive sensitivity and specificity of 90.24% and 89.19%, respectively. Conclusions:The incidence of hypopituitarism is higher after severe TBI. Increased intracranial pressure, midline displacement ≥5 mm, diffuse cerebral edema, serum BDNF, NSE, VEGF and TNF-α levels are all used as predictors of hypopituitarism.

Impact of Moderate Altitude on Lung Diseases and Risk of High Altitude Illnesses

ABSTRACT A large world population resides at moderate altitudes. In the Valley of Mexico (2240 m above sea level) and for patients with respiratory diseases implies more hypoxemia and clinical deterioration, unless supplementary oxygen is prescribed or patients move to sea level. A group of individuals residing at 2500 or more meters above sea level may develop acute or chronic mountain disease but those conditions may develop at moderate altitudes although less frequently and in predisposed individuals. In the valley of México, at 2200 m above sea level, re-entry pulmonary edema has been reported. The frequency of other altitude-related diseases at moderate altitude, described in skiing resorts, remains to be known in visitors to Mexico City and other cities at similar or higher altitudes. Residents of moderate altitudes inhale deeply the city's air with all pollutants and require more often supplementary oxygen.

Trombosis venosa cerebral en paciente embarazada. A propósito de un caso / Brain venous thrombosis in pregnant patient. About a case / Trombose venosa cerebral em paciente gestante. Relato de um caso

Resumen: Introducción: La trombosis venosa cerebral (TVC) es una enfermedad grave que afecta con mayor frecuencia a adultos jóvenes, con una incidencia de tres casos por cada 1'000,000 de habitantes en edad adulta. Aproximadamente se reporta 0.5% de los eventos vasculares cerebrales, siendo más frecuente en el género femenino, como factores de riesgo importante está el embarazo, parto, puerperio y uso de anticonceptivos orales (ACO). Caso clínico: Femenino de 34 años, con 8.2 semanas de gestación (SDG) normoevolutivo, que inicia siete días previos a su ingreso con cefalea occipital de intensidad moderada, que se intensifica progresivamente y empeoraba al estar acostada, agregándose náuseas y vómitos, sugestivos de cráneo hipertensivo, por lo que acude a hospital, donde ingresa con Glasgow de 15 puntos, se realiza resonancia magnética (RM), que muestra trombosis del seno venoso transverso izquierdo y hemorragia intraparenquimatosa temporoparietal izquierda, presenta deterioro del estado neurológico, requiere manejo avanzado de vía aérea y traslado a Unidad de Cuidados Intensivos (UCI). La tomografía de cráneo (TC) de ingreso a UCI con hematoma parenquimatoso temporoparietal izquierdo, edema cerebral, colapso de sistema ventricular lateral ipsilateral y desviación de la línea media, valorada por neurocirugía, quien descarta procedimiento quirúrgico y se inicia terapia osmolar con soluciones hipertónicas al 7.5%. La TC cinco días después muestra infarto cerebral en hemisferio izquierdo y sangrado intraparenquimatoso antiguo, el cual se encuentra en procesos de reabsorción; sin embargo, edema cerebral severo, que requiere de craniectomía parietofrontal izquierda. La TC de control con disminución del edema, logrando progresar y destetar de la ventilación mecánica, egresándose a piso de ginecología con Glasgow de 14 puntos y embarazo de 10.2 SDG normoevolutivo. Conclusiones: Esta patología es potencialmente reversible con un diagnóstico precoz y atención médica adecuada. La RM es el estudio de elección.

Abstract: Introduction: Cerebral venous thrombosis (CVT) is a serious disease that most frequently affects young adults, with an incidence of three cases per million adult inhabitants. It is the cause of 0.5% of cerebral vascular events. It is more frequent in women, is associated with childbirth, puerperium and the use of oral contraceptives. Clinical case: Female, 34 years old, with 8.2 weeks of gestation, which began seven days prior to admission with intense headache, nausea and vomiting, suggestive of hypertensive skull; went to hospital, where he was admitted with Glasgow 15 points, MRI was performed, which showed thrombosis of the left transverse venous sinus and left parietal temporo intraparenchymal hemorrhage, showed deterioration of neurological status, and required advanced airway management and transfer to Intensive Care Unit. CT (computed tomography) of the skull on admission to the Intensive Care Unit showed parenchymal left parietal temporo hematoma, cerebral edema, collapse of the ipsilateral lateral ventricular system and deviation of the midline. Neurosurgery assessed who ruled out surgical procedure and began osmolar therapy with hypertonic solutions at 7.5%. CT scan five days later showed cerebral infarction in the left hemisphere and old intraparenchymal bleeding in reabsorption process but severe cerebral edema, which required left parietal frontal craniectomy. The control CT scan with decreased edema, achieving weaning from mechanical ventilation, graduated to the floor of gynecology with Glasgow 14 points and pregnancy of 10.2 SDG. Conclusions: It is very important the correct diagnosis and not to confuse pregnancy alterations with neurological symptoms. MR is the study of choice.

Resumo: Introdução: A trombose venosa cerebral (TVC) é uma doença grave que acomete mais frequentemente adultos jovens, com incidência de 3 casos 1'000,000 habitantes na idade adulta. Aproximadamente são relatados 0.5% dos eventos vasculares cerebrais, sendo mais frequentes no sexo feminino, como fatores de risco importantes estão a gravidez, parto, puerpério e uso de anticoncepcionais orais (AO). Caso clínico: Paciente do sexo feminino, 34 anos, com 8.2 semanas de gestação (SDG) evoluindo normalmente, que iniciou 7 dias antes da internação com cefaléia occipital de intensidade moderada, que se intensificava progressivamente e piorava ao deitar, somando-se náuseas e vômitos, sugestivos de crânio hipertenso, busca atenção hospitalar, onde é internada com um Glasgow de 15 pontos, realiza-se ressonância magnética (RM), que mostra trombose do seio venoso transverso esquerdo e hemorragia intraparenquimatosa temporomandibular esquerda, apresenta deterioração do quadro neurológico e requer manejo avançado das vias aéreas e transferência para a Unidade de Terapia Intensiva (UTI). A tomografia de crânio (TC) na admissão na UTI mostrou hematoma parietal temporal esquerdo, edema cerebral, colapso do sistema ventricular lateral ipsilateral e desvio da linha média, avaliada por neurocirurgia que descartou procedimento cirúrgico e iniciou terapia osmolar com soluções hipertônicas a 7.5%. A TC 5 dias depois mostra infarto cerebral no hemisfério esquerdo e sangramento intraparenquimatoso antigo que está em reabsorção, porém edema cerebral grave, que requer craniectomia parietofrontal esquerda. A TC de controle mostrou diminuição do edema, progredindo ao desmame da ventilação mecânica, alta para o andar de ginecologia com escore de Glasgow de 14 e gravidez de 10.2 SDG evoluindo normalmente. Conclusões: Esta patologia é potencialmente reversível com diagnóstico precoce e cuidados médicos adequados. A ressonância magnética é o estudo de eleição.

Application strategies of continuous blood purification in pediatric patients with cerebral edema / 中国小儿急救医学

Continuous blood purification(CBP)has been extensively used in pediatric critical care and proven effective in pediatric patients with cerebral edema.However, as a causative factor of changes in blood pressure, blood volume, plasma osmotic pressure, and drug metabolism, CBP may have reduced efficacy and even exacerbate the cerebral edema when pediatric patients are provided with inadequate clinical evaluation and intervention or inappropriate settings of treatment parameters.This paper presented a literature review on the application strategies of CBP as a treatment of pediatric patients with cerebral edema to provide a reference for clinical practice.

Timing of brain computed tomography for predicting neurological prognosis in comatose cardiac arrest survivors: a retrospective observational study / 世界急诊医学杂志（英文）

@#BACKGROUND: To assess the association between relevant brain computed tomography (CT) parameters at different time and neurological prognosis in adult comatose survivors after cardiac arrest (CA). METHODS: A total of 94 CA patients who underwent early and late CT scans (within 24 h and 24 h to 7 d respectively after CA) between January 2018 and April 2020 were enrolled in this retrospective study. According to the Cerebral Performance Category (CPC) score at hospital discharge, the patients were divided into either a good outcome (CPC 1-2) group or a poor-outcome group (CPC 3-5). The grey-to-white matter ratio (GWR) and the proportion of cerebrospinal fluid volume (pCSFV) were measured. In predicting poor outcomes, the prognostic performance of relevant CT parameters was evaluated, and the comparison analysis (expressed as the ratio of parameters in late CT to those in the early CT) of different CT time was conducted. RESULTS: Totally 26 patients were in the good-outcome group, while 68 patients were in the poor-outcome group. The putamen density, GWR, and pCSFV in late CT were significantly lower in the poor-outcome group (P<0.05). The ratios of GWR and pCSFV in the poor-outcome group were significantly decreased according to comparison analysis of different CT time (P<0.05), while there was no significant difference in the ratio of putamen density. GWR-basal ganglia <1.18 in late CT showed the best predictive value. The ratio of pCSFV <0.98 predicted unfavorable neurological outcomes with a sensitivity of 65.9% and a specificity of 93.8% (P=0.001). CONCLUSIONS: Brain CT performed >24 h after CA may be a good choice as a neuroimaging approach to evaluating prognosis. To predict neurological prognosis, comparison analysis of different CT time can be used as another promising tool in comatose CA survivors.

A preliminary study on the mechanism of 7-HEC on high altitude cerebral edema / 药学实践与服务

Objective To study the possible mechanism of 7-hydroxyethyl chrysin (7-HEC) on high altitude cerebral edema (HACE). Methods A rat model of high altitude cerebral edema was established. The activity of superoxide dismutase (SOD) and the content of malondialdehyde (MDA) in rat brain tissues were measured. The expression levels of apoptosis, cell cycle and autophagy related proteins were detected by Western blotting to explore the protective effect of 7-HEC on high altitude cerebral edema and its mechanism. Results Compared with the control group, the content of MDA in the brain tissue of the hypoxia model group was significantly up-regulated; the activity of SOD was significantly down-regulated, the relative expression of CyclinD1, CyclinE1, CDK6 and CDK2, apoptotic proteins Bcl-2, PARP, and autophagy protein LC3-B were down-regulated; and the relative expression of apoptotic protein Bax and autophagy protein P62 were up-regulated; the difference was statistically significant (P<0.05); Compared with the hypoxia model group, the content of MDA was down-regulated and the activity of SOD was significantly up-regulated in the 7-HEC administration group. The relative expression of CyclinD1, CyclinE1, CDK6, CDK2, apoptotic proteins Bcl-2, PARP, autophagy protein LC3-B was up-regulated and the relative expression of apoptotic proteins Bax and the relative expression of autophagy protein P62 was down-regulated in the 7-HEC administration group. The difference was statistically significant (P<0.05). Conclusion 7-HEC has a certain protective effect on high altitude cerebral edema, and its mechanism may be related to the regulation of cell cycle, autophagy, apoptosis and oxidative stress pathways.

The ameliorative effects of Hypericum perforatum extract on high altitude cerebral edema in hypoxic rats / 中国药理学通报

Aim To study the ameliorative effects of Hypericum perforatum extract(HPE)on high altitude cerebral edema(HACE)in hypoxia rats.Methods A large low-pressure oxygen chamber was used to simulate the hypoxia environment at an altitude of 7 500 m.The pathological changes of HPE on the brain tissues of HACE rats were observed,and the water content,oxidative stress and inflammatory factors related indicators of brain tissues were detected.Results Through administered HPE by gavage,the histopathological damage of HACE rats was improved,the concentration of nuclear pyknosis was reduced,the degree of vacuolization was reduced,and the inflammatory response was alleviated.At the same time,HPE decreased the water content and the contents of MDA,H2O2,IL-1β,IL-6,VEGF and TNF-α in brain tissues of HACE rats,while increased the content of GSH and the activities of T-SOD and CAT.Conclusions HPE can ameliorate HACE in hypoxic rats to some extent,the mechanism of which may be related to ameliorating oxidative stress injury and reducing inflammation response.Hypericum perforatum is expected to be developed as a drug preparation for the treatment of HACE.

Seven cases of toxic encephalopathy associated with diquat poisoning / 中华急诊医学杂志

Objective:To improve the understanding of the clinical features of toxic encephalopathy associated with diquat poisoning.Methods:This study collected and analyzed the diagnosis and treatment process of 7 patients with acute diquat poisoning combined with central nervous system complications admitted to the First Affiliated Hospital of Zhengzhou University from April 2021 to April 2022. "Diquat" and "Poisoning" were used as keywords to search in CNKI, Wanfang database and PubMed database, and the literature of previous cases was reviewed for summary analysis.Results:Among the 7 patients in our hospital, there were 2 males and 5 females, with an average age of 31 years (range14-57) and an average dose of 23.14 g [(10-40)g]. During the treatment, 3 patients developed irritability and convulsions, 3 patients occurred coma, and one had generalized tonic-clonic seizures. Four patients died and 3 survived, of which 2 patients returned to normal life and study, and one remained abnormal mental behavior (currently in long-term follow-up). All three survivors developed neurological symptoms later than those who died, and were awake about 30 days after taking the drug.Conclusions:Toxic encephalopathy associated with diquat poisoning has rapid progression, poor prognosis and high mortality. This study found that the survival rate of patients with > 48 h of first onset of neurological symptoms is much higher than that of patients with ≤ 48 h of first onset of neurological symptoms, while sex, age, estimated oral dose, and type of presentation of neurological symptoms for the first time have little effect on the survival rate of hospital discharge. The earlier neurological symptoms appear, the greater the likelihood of a poor prognosis.

Research progress of diabetic ketoacidosis complicated withcerebral edema in children / 预防医学

Abstract@#Diabetic ketoacidosis (DKA) is a serious complication of diabetes in children. A small number of children with DKA can be complicated by cerebral edema, leading to acute brain dysfunction, which is the main cause of death in children with diabetes. Because of unclear pathogenesis and non-specific clinical manifestations, DKA complicated with brain edema is easy to be missed or misdiagnosed. The identification and management of risk factors of DKA complicated with brain edema and early identification of brain edema are of great importance for improving the prognosis. This article reviewed the literature about the pathogenesis, clinical manifestations, risk factors, treatment and prevention of DKA complicated with brain edema, so as to provide reference for its early clinical identification and intervention.

Bloodletting Puncture at Hand Twelve Jing-Well Points Relieves Brain Edema after Severe Traumatic Brain Injury in Rats via Inhibiting MAPK Signaling Pathway / 中国结合医学杂志

OBJECTIVE@#To investigate whether blood-brain barrier (BBB) served a key role in the edema-relief effect of bloodletting puncture at hand twelve Jing-well points (HTWP) in traumatic brain injury (TBI) and the potential molecular signaling pathways.@*METHODS@#Adult male Sprague-Dawley rats were assigned to the sham-operated (sham), TBI, and bloodletting puncture (bloodletting) groups (n=24 per group) using a randomized number table. The TBI model rats were induced by cortical contusion and then bloodletting puncture were performed at HTWP twice a day for 2 days. The neurological function and cerebral edema were evaluated by modified neurological severity score (mNSS), cerebral water content, magnetic resonance imaging and hematoxylin and eosin staining. Cerebral blood flow was measured by laser speckles. The protein levels of aquaporin 4 (AQP4), matrix metalloproteinases 9 (MMP9) and mitogen-activated protein kinase pathway (MAPK) signaling were detected by immunofluorescence staining and Western blot.@*RESULTS@#Compared with TBI group, bloodletting puncture improved neurological function at 24 and 48 h, alleviated cerebral edema at 48 h, and reduced the permeability of BBB induced by TBI (all P<0.05). The AQP4 and MMP9 which would disrupt the integrity of BBB were downregulated by bloodletting puncture (P<0.05 or P<0.01). In addition, the extracellular signal-regulated kinase (ERK) and p38 signaling pathways were inhibited by bloodletting puncture (P<0.05).@*CONCLUSIONS@#Bloodletting puncture at HTWP might play a significant role in protecting BBB through regulating the expressions of MMP9 and AQP4 as well as corresponding regulatory upstream ERK and p38 signaling pathways. Therefore, bloodletting puncture at HTWP may be a promising therapeutic strategy for TBI-induced cerebral edema.

Analysis of the severity and prognostic factors of cerebral edema after mechanical thrombectomy in patients with anterior circulation occlusion of great vessels / 中风与神经疾病杂志

@#Objective　To investigate the severity and prognostic factors of cerebral edema after mechanical thrombectomy in acute ischemic stroke with anterior circulation occlusion of great vessels.Methods　Eighty-three patients with acute cerebral infarction undergone mechanical thrombotomy in our hospital were selected.According to cerebral edema.They were divided into mild group,moderate group and severe group.The patients were divided into the good prognosis group and the poor prognosis group by the improved 90 day Rankin scale.Univariate analysis and Logistic regression analysis were used to analyze the severity of cerebral edema and the prognostic factors.Results　History of hypertension.baseline NHISS>15 points were positively correlated with the severity of cerebral edema.while M2 segment and distal occlusion and successful recanalization were negatively correlated with the severity of cerebral edema.Severe cerebral edema and baseline NHISS>15 were risk factors for poor prognosis 3 months and good collateral circulation and successful recanalization were predictive factors for good prognosis.Conclusion　Baseline NIHSS score>15 points,history of hypertension,non-recanalization of blood vessels and occlusion of cerebral blood vessels were the predictors of the severity of cerebral edema in acute stage after mechanical thrombectomy in patients with anterior circulation occlusion of great vessels.Severity of cerebral edema,baseline NIHSS score,vascular recanalization and collateral circulation status were predictors of neurological recovery after 90 days.

Animal models of acute plateau disease / 中国药理学通报

Acute plateau disease refers to a variety of physiological and pathological reactions produced by the body in a short period of time after rapidly advancing into the high-pressure and low-oxygen plateau area with an altitude above 2 500 meters, mainly including acute mountain sickness (AMS), high altitude pulmonary edema (HAPE) and high altitude cerebral edema (H A C E), which seriously affects the health of people in the acute plateau and even threats their lives. The establishment of an animal model of acute plateau disease with good reproducibility and a sound evaluation system are the basis of the research on acute plateau disease. Acute plateau disease is mainly caused by the low oxygen conditions on the plateau, so the animal model of acute plateau disease can be established in plateau environment simulation cabin or plateau field, simple breeding or animal treadmill assisted sports training. The indicators that indicate the success of the model establishment are commonly used blood gas, inflammation factors, organizational water content and pathological section. In this article, the animal models of acute plateau disease established in recent years are reviewed from the aspects of modeling environment, modeling methods and evaluation indicators.

Prevalencia de edema cerebral en pacientes con cetoacidosis diabética / Prevalence of cerebral edema among diabetic ketoacidosis patients

Introducción. El edema cerebral (EC) es la complicación más grave de la cetoacidosis diabética (CAD) en niños. La patogénesis del EC no se conoce con exactitud y su aparición ha sido relacionada con la terapia de rehidratación endovenosa en el tratamiento inicial.Objetivos. Estimar la prevalencia de EC en pacientes con CAD tratados en el Hospital General de Niños Pedro de Elizalde mediante rehidratación endovenosa y analizar potenciales factores de riesgo para el desarrollo de EC.Materiales y método. Estudio de diseño transversal para prevalencia y un análisis exploratorio para comparar las características clínicas y de laboratorio entre los pacientes con y sin EC. Se incluyeron pacientes de 1 a 18 años hospitalizados con diagnóstico de CAD desde el 1 de enero de 2005 hasta el 31 de diciembre de 2014.Resultados. Se analizaron 693 episodios de CAD en 561 historias clínicas. En 10 pacientes, se evidenció EC (el 1,44 %; intervalo de confianza del 95 %: 0,8-2,6). Los pacientes con EC presentaron mayor uremia (p < 0,001), menor presión de dióxido de carbono (p < 0,001) y menor natremia (p < 0,001) que aquellos pacientes sin EC.Conclusión. La prevalencia de EC en pacientes con CAD fue del 1,44 %, menor que la reportada en nuestro país (del 1,8 %). Los factores de riesgo al ingresar asociados a su desarrollo fueron la presencia de uremia elevada, hiponatremia e hipocapnia.

Introduction. Cerebral edema (CE) is the most severe complication of diabetic ketoacidosis (DKA) in children. There is no accurate knowledge of CE pathogenesis and its onset has been related to intravenous rehydration therapy during the initial treatment.Objectives. To estimate the prevalence of CE among DKA patients treated at Hospital General de Niños Pedro de Elizalde with intravenous rehydration and analyze potential risk factors for the development of CE.Materials and methods. Cross-sectional prevalence study and exploratory analysis to compare clinical and laboratory characteristics between patients with and without CE. Patients aged 1-18 years hospitalized with the diagnosis of DKA between January 1st, 2005 and December 31st, 2014 were included.Results. A total of 693 DKA events from 561 medical records were analyzed. Ten patients had evidence of CE (1.44 %; 95 % confidence interval: 0.8-2.6). Patients with CE had higher serum urea levels (p < 0.001), lower carbon dioxide pressure (p < 0.001), and lower serum sodium levels (p < 0.001) than those without CE.Conclusion. The prevalence of CE among DKA patients was 1.44 %, smaller than that reported in our country (1.8 %). The risk factors at admission associated with CE development were high serum urea levels, hyponatremia, and hypocapnia.

Un ejemplo de respuesta adaptativa integrada: la aclimatación humana a la altitud / An example of integrated adaptive response: human acclimatization to altitude

Se describen las respuestas fisiológicas que el ser humano desarrolla en respuesta a la exposición a la altitud geográfica. Se describen no sólo las alteraciones debidas a una mala coordinación de los ajustes fisiológicos desencadenados durante la aclimatación a la altura sino también sus manifestaciones clínicas más relevantes. Se detallan los mecanismos moleculares subyacentes a tales respuestas y cómo su mejor conocimiento puede permitir aplicar la exposición intermitente a hipoxia como una herramienta útil para la resolución o alivio de determinadas alteraciones y patologías.

We depict the physiological responses developed by the human body in response to the exposure to geographic altitude. The main alterations due to a noncoordinated setup of the physiological adjustments triggered during the acclimatization at altitude are also described, as its most relevant clinical manifestations. The molecular mechanisms underlying such responses are detailed, and how a better knowledge of these processes can allow us to apply intermittent exposure to hypoxia programs as a useful tool for the resolution or relief of certain disorders and pathologies.

Comparison of outcome of milwaukee regimen and 48 hours regimen in diabetic ketoacidosis in a tertiary care hospital in Chitradurga, Karnataka, India

Background: Diabetic ketoacidosis (DKA) is an acute life threatening and a medical emergency that accounts for the majority of diabetes related mortality and morbidity in the pediatric age group who are suffering from type 1 Diabetes Mellitus (DM). Objective of this study was to compare the clinical outcome in a patient with DKA who are been treated with Milwaukee regimen (24hours) and 48 hours regimen.Methods: A retrospective study was conducted in PICU of tertiary care hospital in Chitradurga, Karnataka. Data was collected from 2015 to May 2018. Diagnosis of DKA was made by plasma glucose level higher than 200mg/dl, venous blood PH of <7.3 and /or bicarbonate <15 mmol/L, presence of ketonuria. Among 56 cases, 36 cases were treated with 48 hours regimen and 20 cases were treated with Milwaukee regimen and results were compared.Results: The median age of presentation was 7.52 years (Range: 2-14 years) with female: male ratio of 1:1.3. Newly diagnosed type 1 DM cases constituted 80.7%. The most common presenting complaints were hurried breathing and altered sensorium. The average length of stay in the ICU was 3.5 days for 48 hours regimen and 4.5 days for Milwaukee regimen. The mortality rate was 10.71 % (6 cases), among which 15% (3 cases) were patients treated with Milwaukee and 8.3% (3 cases) were patients treated with 48 hours regimen. Cerebral edema was found to be the commonest cause of fatality.Conclusions: There is lack of awareness regarding dog bite and its management among the rural population.

Protective effect of the Potentilla anserina polysaccharide on high altitude cerebral edema and high altitude pulmonary edema in rats / 国际药学研究杂志

Objective: To test the anti-plateau hypoxia effect of Potentilla anserina polysaccharide(PAP), Cynomorium songarieum Rupr. polysaccharide(SCRP), Sphallerocarpus gracilis polysaccharide(SGP)and Lilium brownii polysaccharide(LP), and then investigate the protective effect of most effective polysaccharide on the high altitude cerebral edema(HACE)and high altitude pulmonary edema(HAPE)in rats. Methods: PAP, CSRP, SGP and LP were prepared by the water extraction-alcohol precipitation method. The normobaric hypoxia test and acute hypoxia test were performed to find out the polysaccharide with the best anti-hypoxia effect and the related dose-dependent effect in mice. A large hypobaric hypoxia chamber stimulating 8000 m altitude was used to investigate pathological changes and water contents in rat brain and lung tissue before and after hypoxia, and the concerned oxidative stress and inflammation related parameters were also measured. The protective effect of PAP on the high altitude cerebral and pulmonary edema was evaluated by the rat model experiments. Results: PAP showed the best and dose-dependent anti-hypoxia effect among the four polysaccharides. The water content in brain and lung tissues of rats increased obviously in the hypoxia model(HM)group, and the brain tissue cell hierarchical fuzzy, lung tissue congestion and edema as well as the heavy inflammatory cell infiltration, widening of alveolar interval and thickening of alveolar wall were also found in the HM group. The enzymatic activity of SOD was notablely depressed, while both the MDA and IL-1β contents in brain and lung tissues remarkably increased(P<0.01)in the HM group. Com- pared with the HM group, the water content in the rat brain and lung tissues significantly decreased in each of the different dose PAP groups(P<0.05 or P<0.01), and the inflammatory cell infiltration, alveolar interval, and thickness of alveolar wall all notabely decreased in the HM group. Furthermore, the enzymatic activity of SOD increased, while both the MDA and IL-1β contents decreased, all significantly in the PAP groups than in the HM group(P<0.05 or P<0.01). Conclusion: PAP showed a good anti-hypoxia effect and effectively inhibited HACE and HAPE to exert a certain protective effect in a rat model.

Neuro-imaging study in eclampsia

Background: Eclampsia is associated with increased risk of maternal death varying from 1.8 % in developed countries to 14 % in developing countries. Cerebral complications are the major cause of death in eclampsia patients. Eclampsia along with hypercoagulopathy of pregnancy is a high risk fact for patient in respect of development of cerebrovascular thrombosis/haemoorhage. Eclampsia patients have been found to have various CNS pathological conditions amenable to the medical treatment. The aim of the study is to know the neuropathophysiology behind an eclamptic seizure to reduce the morbidity associated with it.Methods: Prospective study design included 50 patients for the study. All patients were admitted in the eclampsia room with h/o convulsions. All patients were put on MgSO4 therapy and anti-hypertensive. Cranial CT scan examinations were performed for all patients within 24hours of last convulsion without intravenous contrast material injection. Time taken to recover from all the clinical symptoms like altered consciousness, defective vision, headache and seizure and the maternal outcome are compared.    Results: 62% of patients with eclampsia had detectable pathological changes in CT scan. Cerebral edema was the most common CT scan finding with parietal lobe was the most common site (90.32%) of pathological changes. Mortality rate was high among eclamptic patients with cerebral hemorrhage.Conclusions: CT scan was found to be effective in detecting cerebral pathology in more than half of the eclamptic patients. The most common pathological changes detected are cerebral edema and cerebral infarction. CT scan may not be required for the diagnosis of eclampsia, but it must be used in certain complicated patients to detect cerebral pathology at the earliest so that specific management could be provided to reduce the maternal mortality.