Effects of circadian misalignment induced by abnormal photoperiod on expression rhythm of clock genes and glucose uptake related genes in gastrocnemius in rats / 中国康复理论与实践

ObjectiveTo investigate the impacts of circadian misalignment on glucose uptake of skeletal muscle and metabolism in rats. MethodsA total of 36 male Wistar rats were divided into circadian alignment (CA, normal light-dark cycles, n = 18) and circadian misalignment (CM, shifted light-dark cycles, n = 18) groups. ClockLab behavior analysis was performed for 18 days (61 to 78 days after modeling). Intraperitoneal injection glucose tolerance test and physiologic measures were performed 85 days after modeling. They were euthanized 91 to 92 days after modeling, at 8:00, 12:00, 16:00, 20:00, 24:00 and 4:00 next day. Gastrocnemius tissue was collected and measured for Bmal1, Clock, Per2, Tbc1d1, Glut4 and Pgc1α by reverse transcription real-time quantitative polymerase chain reaction (RT-qPCR). ResultsThe circadian cycle increased (t = -6.557, P < 0.001), the amplitude decreased (t = 2.326, P = 0.030) and the area under curve (AUC) of the blood glucose of intraperitoneal glucose tolerance test decreased (t = -2.622, P = 0.016) in CM group. In gastrocnemius, there was difference in the expression of the Bmal1 (F = 6.691, P < 0.001), Clock (F = 4.188, P = 0.007), Per2 (F = 10.893, P < 0.001), Tbc1d1 (F = 3.411, P = 0.018), Glut4 (F = 5.439, P = 0.002) and Pgc1α (F = 15.376, P < 0.001) across different time; meanwhile, there was difference in the expression of Bmal1 (F = 5.020, P = 0.035), Per2 (F = 8.996, P = 0.006), Tbc1d1 (F = 51.111, P < 0.001) and Pgc1α (F = 10.177, P = 0.004) between groups, and the total Tbc1d1 expression decreased in CM group (t = 4.349, P < 0.001). ConclusionCM induced by shifted light-dark cycles may lead to glucose tolerance impairment in rats, which may be related to the decreased expression of Tbc1d1 and the changes of transcription rhythm of Bmal1, Per2 and Pgc1α in gastrocnemius.

The detection and data analysis of delivered energy of cardiac defibrillator / 中国医学装备

Objective:To adopt defibrillation analyzer to detect performance of delivered energy of cardiac defibrillator and to reveal its relevant changing regular, and carry out scientific verification so as to take the detection data to play a role in the maintenance work of equipment.Methods: According to National Metrological technical specification "JJF 1149-2014 Calibration Specification for Cardiac Defibrillators", the FLUKE IMPULSE 7000DP Defibrillator Analyzer was applied to obtain data, and then a comprehensive analysis method with graphs and table was used to analyze these test data.Results: Through analyzed the detection data of delivered energy to grasp the whole performance situation of using equipment and to enhance the cognition of technique and application level for Defibrillator Analyzer.Conclusion: Through analyzes data to find out the changing regular of delivered energy and the difference phenomenon of detection data distribution, and to elaborate the reason of phenomenon or influence factor. Through detects performance to screen out the poorest equipment of delivered energy so as to avoid medical risk that comes from hidden danger of equipment performance in the process of clinical therapy.

Methods for solving the neck two-point T2-DIXON fat-water separation misalignment / 中华放射学杂志

Objective To explore the methods for solving the neck two-point T2-DIXON fat-water separation misalignment. Methods During August 2015 to July 2016, 140 patients with fat-water separation on the nasopharynx and cervical axial T2-DIXON images were prospectively recruited from Sichuan Cancer Hospital. There was no metal implant in the fat-water separation misalignment area. The patients were divided into 7 groups by random number table method with 20 patients in each group for the axial T2-DIXON scan: Group A adopted plan 1( increasing localized shim box on the fat-water separation misalignment area);Group B adopted plan 2(increasing the times of repeated acquisition to 2 of the T2-DIXON sequence);Group C adopted plan 3 (placing the shimming assist device on the inspection area);Group D adopted plan 1+plan 2;Group E adopted plan 1+plan 3;Group F adopted plan 2+plan 3;Group G adopted plan 1+plan 2+plan 3. The images quality of two scans were graded and compared. We compared the signal-to-noise ratio (SNR) of T2-DIXON image on the same muscle tissue between the two scans of each group. The difference of SNR on the two scan images was compared with the paired t test, the difference of SNR among seven groups was conducted with independent sample t test, and the comparison of image quality classification was conducted by rank sum test. Results The image quality of all the seven groups was improved to some different degrees. The cases with image quality reaching level 3 were 12, 15, 15, 16, 17, 18 and 18 in A to G groups, respectively. It was better to use the combination of two or more methods to improve the quality of the image than to use a single method. There were no statistically significant differences in SNR between two scans in A, C and E group (all P>0.05).There were statistically significant differences in SNR between two scans in groups of B, D, F and G(all P<0.05). There were statistically significant differences among the 7 groups, with the best quality in G group (P<0.05). There was no significant difference in the first SNR among the 7 groups (P>0.05);there were significant differences in the second scans among the 7 groups (P<0.05) .Conclusions This study suggests that placing localized shim box, increasing the times of repeated acquisition, and use of shimming assist device in MRI correct the fat-water separation misalignment, help to provide images with high quality. The combination of the above method was better than using the single method. The SNR can be improved when increasing the times of repeated acquisition.

A Novel De Novo Pathogenic Variant in FOXF1 in a Newborn with Alveolar Capillary Dysplasia with Misalignment of Pulmonary Veins

Alveolar capillary dysplasia with misalignment of pulmonary veins (ACD/MPV) is an autosomal dominant, fatal developmental disorder of the lungs, with a mortality rate of about 100%. ACD/MPV is caused by mutations in FOXF1. Herein, we describe a newborn boy with ACD/MPV carrying a novel pathogenic variant of FOXF1. The patient developed respiratory distress and severe pulmonary hypertension on the first day of life. Despite aggressive cardiorespiratory management, including veno-venous extracorporeal membrane oxygenation, his condition deteriorated rapidly, and he died within the first month of his life. Lung histology showed the characteristic features of ACD/MPV at autopsy. Sequence analysis of FOXF1 from genomic DNA obtained from autopsied lung tissue revealed that the patient was heterozygous for a novel missense variant (c.305T>C; p.Leu102Pro). Further analysis of both parents confirmed the de novo occurrence of the variant. To the best of our knowledge, this is the first report of genetically confirmed ACD/MPV in Korea.

Enfermedad pulmonar difusa: causa de hipertensión pulmonar persistente antes del año de vida / Diffuse lung disease: cause of persistent pulmonary hypertension before one year of age

En pediatría, la enfermedad vascular pulmonar es multifactorial y heterogénea. Si bien comparte algunas características con la hipertensión pulmonar en los adultos, hay diferencias en las comorbilidades y condiciones asociadas, la coexistencia de enfermedades genéticas o del desarrollo. Las enfermedades pulmonares intersticiales pueden ser causantes de esta entidad. Una de ellas es la displasia alvéolo-capilar con mal alineamiento de las venas pulmonares, una patología infrecuente pero con 100% de mortalidad, caracterizada por la falla en la formación del tejido pulmonar que da por resultado final la alteración en la difusión de gases. Se describe un caso clínico de una paciente de 5 meses de edad estudiada a partir de sospechar una cardiopatía congénita con hipoxemia persistente, a cuyo diagnóstico se llega por la biopsia pulmonar.

Pulmonary vascular disease in children is multifactorial and heterogeneous. While it shares some features with pulmonary hypertension in adults, there are differences in the associated comorbidities and conditions, the coexistence of genetic or developmental diseases. Interstitial lung diseases may be responsible for this entity. One is alveolar capillary dysplasia with misalignment of pulmonary veins, a rare pathology but with a mortality rate of 100%, characterized by a failure in the formation of lung tissue that eventually results in impaired gas diffusion. We present a 5-month-old patient studied due to suspected congenital heart disease with persistent hypoxemia; diagnosis was made through lung biopsy.

Detection of Toric intraocular lens misalignment by digital photograph / 眼科研究

Background Toric intraocular lens (Toric IOL) is a well accepted method of correct of corneal astigmatism.Axial misalignment,including the error of intraocular lens alignment during surgery and rotation of Toric IOL,is the main barrier to the precise alignment of Toric intraocular lenses.Therefore,the angle of axial misalignment is a main index to evaluate the effectiveness of Toric IOL implantation.Objective The present study is to describe a method of precisely detecting Toric IOL misalignment using postoperative digital photograph.Methods A measuring template (polar coordinates) was constructed using Adobe Photoshop software.Minimum graduate to detect the Toric axis was 1° (maximum error 0.5°).The clinical data of 24 eyes undergone Toric IOL implantation was retrospectively analyzed.Corneal astigmatism was detected by rotating Scheimpflug camera (Pentacam) or slit scan (Orbscan).Digital retro illumination picture was photographed after mydriasis.The picture was analyzed by our derived template.The steepest corneal axis and the axis of Toric IOL were then determined.The misalignment of Toric IOL was determined as the angle between the steepest corneal axis and the axis of Toric IOL.Misalignment of Toric IOL and its distribution were analyzed by statistical means.Results A method using polar coordinates and digital photo to precisely detect Toric IOL misalignment was derived.Mean Toric IOL misalignment was 10.93±6.90 degrees (0-24 degrees) in the 24 cases.The axial misalignment in all of cases were within 25 degrees,including clockwise in 14 eyes(58.33%),anticlockwise in 10 eyes (41.67%).In this study,the misalignment angle of 4 eyes were within 5 degrees;11 eyes were 5 to 10 degrees;1 eye was 10 to 15 degrees;6 eyes were 15 to 20 degrees;2 eyes were 20 to 25 degrees.Conclusion The method is feasible to the direction of Toric IOL misalignment in clinic.