ABSTRACT
To investigate the preparation technology and release mechanism of tectorigenin intragastric floating sustained-release tablets. The tablet was produced by wet granulation compression method, with hydroxypropyl methyl cellulose (HPMCK15M), cross-linked polyvinyl pyrrolidone (PVPP), octadecanol and sodium bicarbonate as excipient. The prescriptions were screened and optimized by orthogonal experimental design with in vitro floating capacity and drug release characteristics as the evaluation indexes. The optimization results were as follows: tectorigenin 33.3%, HPMCK15M 16.7%, PVPP 20.0%, octadecanol 13.3%, sodium bicarbonate 5%, and starch gel 10.7%. The prepared tablet can be floated within 10 s in the artificial gastric juice, lasting for 12 h in vitro, with a cumulative release rate of 70% in 10 h. The analysis of Rritger-Peppas equation showed that the sustained-release tablet had two advantages of both drug diffusion and skeleton dissolution. The tablet had good appearance and compressibility, as well as favorable floating capacity and drug release characteristics.
ABSTRACT
<p><b>OBJECTIVE</b>To study the changes in the serum levels of 25-(OH)D3 and immunoglobulins in children with bronchiolitis, and the clinical significance of these changes.</p><p><b>METHODS</b>Serum levels of 25-(OH)D3 were measured using ELISA in 35 children with bronchiolitis in the acute and recovery phases and 20 healthy children. Serum levels of immunoglobulins were determined by rate nephelometry.</p><p><b>RESULTS</b>Compared with the healthy children, serum 25-(OH)D3, IgG and IgA levels in children with bronchiolitis in the acute phase were significantly lower and, in contrast, serum IgE levels were significantly higher (P<0.05). Serum 25-(OH)D3 levels increased and serum IgE levels decreased significantly in the recovery phase compared with the acute phase in children with bronchiolitis (P<0.05). However, compared with the healthy children, serum 25-(OH)D3 and IgA levels were significantly lower and serum IgE levels were significantly higher in children with bronchiolitis in the recovery phase (P<0.05). Serum 25-(OH)D3 levels in children with bronchiolitis in the acute phase were positively correlated with serum IgG (r=0.36, P<0.05) and IgA levels (r=0.63, P<0.01), and negatively correlated with serum IgE levels (r=-0.72, P<0.01). A negative correlation was found between serum 25-(OH)D3 and IgE levels in children with bronchiolitis in the recovery phase (r=-0.34, P<0.05).</p><p><b>CONCLUSIONS</b>Serum 25-(OH)D3 levels decrease and there is immunoglobulin level imbalance in children with bronchiolitis, suggesting that 25-(OH)D3 and immunoglobulins may play important roles in the pathogenesis of bronchiolitis.</p>
Subject(s)
Female , Humans , Infant , Male , Bronchiolitis , Blood , Calcifediol , Blood , Immunoglobulins , BloodABSTRACT
<p><b>OBJECTIVE</b>To study the value of anti-neutrophil cytoplasmic antibody (ANCA) in diagnosis of Kawasaki disease (KD).</p><p><b>METHODS</b>Serum ANCA was detected in 30 children with typical Kawasaki disease (TKD) and in 16 with incomplete Kawasaki disease (IKD) in the acute and the recovery phases respectively. Twenty-five healthy children were randomly selected as a control group. An ultrasonic cardiography (UCG) was performed on children with KD in the acute phase.</p><p><b>RESULTS</b>The mean positive rate of serum ANCA in the acute phase in KD children was 65%, with 69% in IKD children and 63% in TKD children, which were obviously higher than that in the control group (P<0.01). The positive rate of serum ANCA in the recovery phase in KD children was significantly lower than that in the acute phase (33% vs 65%, P<0.05). The positive rate of serum ANCA in the acute phase in children with KD was significantly higher than that detected by UCG (P<0.01). The incidence rate of coronary artery lesions in children with positive ANCA was obviously higher than that in children with negative ANCA (43% vs 13%; P<0.05).</p><p><b>CONCLUSIONS</b>Serum ANCA may be used as a reference index for early diagnosis of KD and secondary coronary artery lesions in children.</p>