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Objective:To investigate the effect of mid-ventricular obstruction (MVO) on left ventricular systolic function in patients with hypertrophic cardiomyopathy(HCM) by four-dimensional automatic left ventricular quantitation technology(4D Auto LVQ).Methods:Fifty-seven hypertrophic obstructive cardiomyopathy patients were selected from December 2020 to October 2022 in the First Affiliated Hospital of Zhengzhou University. According to the presence of MVO, HCM patients were divided into two groups: HCM 1 group, HCM without MVO ( n=34); HCM 2 group, HCM with MVO ( n=23). In addition, 25 healthy subjects in the same period were selected as the control group. Conventional ultrasound parameters were collected, and 4D Auto LVQ technology was used to obtain the mechanical parameters of left ventricular myocardium, including left ventricular longitudinal strain (GLS), circumferential strain (GCS), area strain (GAS), radial strain (GRS), segmental longitudinal strain (SLS) and area strain (SAS). The differences of these parameters among the three groups were compared. Results:①Compared with the control group, the thickness of the maximum basal segment of interventricular septum, the thickness of the middle segment of the maximum interventricular septum, the thickness of the apical segment of the interventricular septum, the thickness of the left ventricular posterior wall and left atrium diameter were significantly increased. Six-minute walk distance and the left ventricular end-diastolic diameter was decreased in the two groups of HCM(all P<0.05). Left ventricular outflow tract gradients in HCM 1 group was higher than HCM 2 group( P<0.05), but there was no significant difference in left ventricular ejection fraction among the three groups( P>0.05). There was significant difference in the incidence of left ventricular apical aneurysm among the three groups( P<0.05). ②Compared with the control group, the GLS in both HCM groups was lower, and it was lower in the HCM 2 group than in the HCM 1 group(all P<0.05) the GRS and GAS in both HCM groups were lower than in the control group ( P<0.05), and there was no significant difference between the two groups of HCM, and there was no significant difference in GCS among the three groups(all P>0.05). ③Compared with the control group, the SLS of basal segment, middle segment, apical cap, posterior septum, inferior wall and lateral wall in HCM group were significantly lower than those in control group. The SLS of apical segment of posterior septum, anterior septum, anterior wall, posterior wall, inferior wall and apical segment of posterior septum, lateral wall and inferior wall in HCM 2 group were significantly lower than HCM 1 group(all P<0.05), but there was no significant difference in SLS of posterior septum, anterior septum, anterior wall, lateral wall and inferior wall between the two groups(all P>0.05). ④Compared with the control group, the SAS of posterior septal basal segment, middle segment, anterior septal middle segment, anterior wall basal segment, middle segment, apical segment, lateral wall basal segment, middle segment, apical segment, posterior wall basal segment, middle segment, inferior wall basal segment, middle segment and apical cap in HCM groups were significantly lower than the control group(all P<0.05), but there was no significant difference in SAS between the two groups of HCM( P>0.05). Conclusions:4D Auto LVQ can quantitatively evaluate the damage of MVO on the left ventricular systolic function in patients with HCM, especially for the evaluation of local myocardial function damage in the medial segment and apical segment.
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Objective To investigate the changes of Claudin-3 and Claudin-11,two key components of blood-testis barrier (BTB) on male infertility induced by γ-ray irradiation.Methods Fortytwo KunMing male mice (20-25 g) were divided into one control group,three γ-ray irradiation groups and three estrodiol (E2) intervention groups randomly:Group A,sham controlled; the lower abnominal and scrotal area of the mice in Group B,C,D were irradiated with single dose of 2,6 or 10 Gy 60Co γ-ray after anaesthetizd; 17β-estradiol intervention were initiated in Group E,F,G after 6 Gy γ-ray irradiation via hypodermic injection for 4w at the dose of 1,2,4 μg/d,respectively.Mice were sacrificed 2 w after the last E2 administration.The tubule differentiation index (TDI) was counted in testis sections.InhibinβB,Claudin-3 and Claudin-11 transcription levels were assayed with semiquantitative real time PCR.Claudin-11 protein levels in testis were generated by western blot.Results Compared with sham control group,TDI in three γ-ray irradiation groups were markedly reduced (68.5 ± 6.4,35.0± 6.1,16.3 ± 5.7 vs 100.0,all P＜0.05).InhibinββB mRNA expression level in testis of gourp D was markedly decreased (0.5±0.2 vs 1.0±0.1,P＜0.05).Claudin-3 mRNA levels of group C and D were up-regulated to 2.17 and 3.49 times,respectively.Claudin-11 protein levels were significantly increased to 2.18 and 2.23 times.Compared with group C,TDI in three E2 intervention groups were improved,which were obvious in group F and G (61.7±7.2,55.8±11.9 vs 35.0±6.1,P＜0.05).The InhibinβB mRNA levels were increased,though there were no significant differences (all P ＞0.05).Claudin-3 mRNA levels in group F and G were down-regulated (1.3± 0.2,1.6±0.3 vs.2.2 ± 0.2,all P＜0.05).In group F significantly reduced mRNA level and protein level of Claudin-11 were observed (mRNA:1.2±0.2 vs.1.8±0.2,P＜0.05; Protein:1.5±0.5 vs.2.2±0.3,P＜0.05).It was negatively correlated TDI with mRNA expression levels of Claudin-3 and Claudin-11 in the irradiated testis (rs =-0.884,P＜0.05; rs=-0.758,P ＜0.05,respectively).Conelusions Irradiation could elevated the expression of claudin-3 and claudin-11.
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Objective To measure the width of space in front of the femoral neck at different age of normal children for diagnosis such as hip disease in children as bilateral transient synovitis of the hip. Methods Four hundred and twenty normal children below 14 years old were divided into 14 groups according to their age. Every group contained 30 children. They underwent bilateral ultrasonographic assessment. The width of space in front of the femoral neck was measured and collected. The mean width value in each group was compared mutually by statistical analysis (t test). Results The mean width of space in front of the femoral neck of normal children below 14 years old was 2.0 - 5.9 mm, the range was 1.2 - 7.8 mm. Conclusions The width of space in front of the femoral neck is different at different age of normal children, the mean value below 14 years old