Alterations of SP-A, SP-D and KL-6 in serum and bronchoalveolar lavage fluid in children with Mycoplasma pneumoniae pneumonia / 中华儿科杂志

<p><b>OBJECTIVE</b>To study the alterations and relationship of surfactant protein (SP)-A, SP-D and KL-6 in serum and bronchoalveolar lavage fluids (BALF) in children with Mycoplasma pneumoniae pneumonia (MPP).</p><p><b>METHOD</b>Self-control method was used for the study on SP-A, SP-D and KL-6 in serum, infected and non-infected BALFs in 32 MMP children with only one side of MPP.</p><p><b>RESULT</b>The contents of SP-A, SP-D and KL-6 in infected BALF were [mg/L;M (IQR) ]: 243 (90-468) , 187 (43-333) , 148 (47-426) ;104 (37-257) , 56 (25-131) , 35 (12-147) in non-infected BALF; 35 (25-69) , 33 (9-149) and 24 (15-62) in serum. The correlation coefficient of KL-6 between serum and infected BALF were -0.534 and -0.378 (P < 0.05).</p><p><b>CONCLUSION</b>There were significant correlation between the alterations of SP-A, SP-D and KL-6 in serum and lung infection in children with CAP. KL-6 in serum may be more sensitive than SP-A and SP-D.</p>

Changes to surfactant proteins in the bronchoalveolar lavage fluid and serum of children with Mycoplasma pneumoniae pneumonia / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To study the changes to surfactant proteins in the serum and bronchoalveolar lavage fluids (BALF) of children with Mycoplasma pneumoniae pneumonia (MPP) and their significance.</p><p><b>METHODS</b>Self-control method was used in the study. Forty-seven MPP children were divided into single lung infected (n=32) and bilateral lung infected groups (n=15) according to lung CT results. Surfactant proteins SP-A, B, C and D were measured using ELISA in the serum and BALF in the two groups. The correlations between SP-A, B, C and D content in the serum and BALF were evaluated by Spearman correlation analysis.</p><p><b>RESULTS</b>SP-A, B, C and D content in BALF from the majorly infected or infected lung were significantly higher than from the opposite lung and serum (P<0.01). SP-A, B and C content in serum was significantly lower than in BALF from the non-infected lung in the single-side infected lung group (P<0.01 or 0.05), but there was no significant difference between serum SP-D content and BALF SP-D content from the non-infected lung. There were no significant differences in SP-A, B, C and D content in serum and BALF from the minorly infected lung in the bilateral lung infected group. Serum SP-D content was positively correlated with BALF SP-D content from the majorly infected lung in the bilateral lung infected group (P<0.01).</p><p><b>CONCLUSIONS</b>Serum SP-D content may serve as a biomarker for evaluating the severity of pulmonary infection in children with community-acquired pneumonia.</p>

Zoledronic acid blocks cell cycle and induces apoptosis in lung cancer cell line 95D cells and their mechanisms of action / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To study the effect of zoledronic acid on cell cycle blocking and induction of apoptosis in lung cancer cell line 95D cells, and their mechanisms of action.</p><p><b>METHODS</b>The effect of zoledronic acid (ZOL) on proliferation of lung cancer cell line 95D cells was observed by MTT assay. Cell cycle and apoptosis of the lung cancer cells was examined by flow cytometry. The apoptosis in the cancer cells was also examined by light and transmission electron microscopy. The expressions of ERK, Bcl-2, Bax and survivin were measured by Western blot and RT-PCR.</p><p><b>RESULTS</b>ZOL showed inhibitory effect on the proliferation of lung cancer cells in vitro, in a time-dependant and a dose-dependant manner. With time extending after ZOL treatment, the number of apoptosis cells was increased. The expression of ERK, Bcl-2 and survivin was down-regulated and that of Bax up-regulated.</p><p><b>CONCLUSION</b>Zoledronic acid can block the cell cycle and induce apoptosis in lung cancer cells in vitro.</p>

Effects of Genistein on the proliferation and expression of survivin in salivary adenoid cystic carcinoma cell line SACC-83 / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the anti-proliferation effect of tyrosine protein kinase inhibitor, Genistein, on human salivary adenoid cystic carcinoma cell line SACC-83, and its effect on Survivin expression.</p><p><b>METHODS</b>SACC-83 cells were treated with different concentration Genistein for different time, cell survival rate was calculated with MTT assay, apoptosis was detected with flow cytometry, the expression of Survivin was quantitatively analyzed by Western blotting and FluorChem V2.0 software.</p><p><b>RESULTS</b>When treated with Genistein of certain concentration for certain time, SACC-83 cell growth was significantly inhibited. With the increase of concentration and elongation of acting time, the inhibitory effects increase. Treated with 220 micromol/L Genistein for 72 hours, SACC-83 cell growth was significantly inhibited, cell apoptosis was induced (P < 0.01), and the expression of Survivin decreased.</p><p><b>CONCLUSION</b>Genistein inhibits the growth of human salivary adenoid cystic carcinoma cell line SACC-83, and induces cell apoptosis; the decrease of Survivin expression may be one of the mechanisms of Genistein inducing apoptosis.</p>

Clinical association of gingipain K-caspase like subdomain expression of Porphyromonas gingivalis with puberty gingivitis / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To detect and compare the activity and intensity of gingipain K (Kgp)-caspase like subdomain in culture medium and cell extract of Porphyromonas gingivalis (Pg) isolates in puberty gingivitis and to reveal the possible association of Kgp with puberty gingivitis.</p><p><b>METHODS</b>Thirty-six children of 14 to 17 years old were enrolled in this study. Clinical parameters including gingival index (GI), sulcus bleeding index (SBI) and probing depth (PD) were evaluated. Subgingival plaque samples were collected and Pg isolates were obtained. 16S rRNA PCR was used to confirm Pg clinical isolates. Bacteria were grown in batches of BHI base and harvested at the end of log-phase growth. Culture fractions (culture medium and cell extract) of 10 Pg isolates were performed with SDS-PAGE and Western blot technique using primary antibody against specific Kgp-caspase like subdomain. Activity of Kgp in both samples was detected as well. The data were statistically analyzed using SPSS 11.5 software. The relationship between the Kgp intensity/activity of Kgp and the clinical parameters was statistically analyzed using Spearman correlation coefficient.</p><p><b>RESULTS</b>There was positive correlation between the intensity/activity of Kgp and the clinical parameters (P < 0.05).</p><p><b>CONCLUSIONS</b>The Kgp in clinical isolates of Pg from puberty gingivitis is in complicated forms. Caspase-like molecules with low molecular weight may exist as intracellular functional protein molecules which can affect the interaction between Pg and host. Kgp was contributes in certain degree to the pathogenesis of puberty gingivitis.</p>

Changes of pulmonary artery protein kinase C activity in rats with chronic inflammatory pulmonary hypertension / 南方医科大学学报

<p><b>OBJECTIVE</b>To observe the changes in pulmonary artery protein kinase C (PKC) activity in rats with chronic inflammatory pulmonary hypertension (PHT).</p><p><b>METHODS</b>Chronic inflammatory PHT was induced in rats with monocrotaline. The PKC activities in the rat pulmonary arteries were measured by radioactive assay during the development of PHT.</p><p><b>RESULTS</b>With the development of chronic inflammatory PHT, the total and cytosolic fractions of PKC activity in PHT rat pulmonary arteries increased initially with subsequent decrease (Plt;0.05), but the membranous fraction of PKC activity and the membrane-to-cytosol PKC activity ratio increased continuously (P<0.05).</p><p><b>CONCLUSION</b>The up-regulation of PKC activity and the translocation of PKC might be associated with the development of chronic inflammatory PHT in rats.</p>

The effect of protein kinase B on the expression and location of p21 in early development of mouse fertilized eggs / 生物工程学报

To investigate the effect of Protein kinase B on the expression and location of p21 in mouse early development. Immunopreciptation technology was used to detect the localization of p21 and Western blotting was used to analyze the expression of p21 after microinjecting mRNA of WT-PKB, myt-PKB and PKB-KD to mouse eggs. There was no obvious difference between the three kinds of mRNA in the expression of p21. But the cell localization altered. The p21 retain in cytoplasm after microjecting myt-PKB. In mouse fertilized egg PKB/Akt controls the cell cycle by changing the cell localization of p21.

Apoptosis induced by cantharidin in human pulmonary carcinoma cells A549 and its molecular mechanisms / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the apoptosis-inducing effect of cantharidin in human lung cancer cells A549 and its molecular mechanisms.</p><p><b>METHODS</b>MTT assay was used to determine A549 cells proliferation. Light and electron microscopy, FACScan, Annexin V-FITC staining and DNA gel electrophoresis were used to detect apoptosis. The expression of bcl-2, Bax and survivin were examined by Western blot.</p><p><b>RESULTS</b>Cantharidin inhibited the proliferation of A549 cells. The cells treated with cantharidin showed a typical apoptotic morphology and hypodiploid peak before G(1) phase. Flow cytometry analysis with annexin quantitatively further confirmed the increase of cell apoptosis. DNA of treated A549 cells depicted a ladder pattern characteristic of apoptosis, indicating the presence of DNA fragmentation. Western blot assay showed that cantharidin increased the level of Bax expression and inhibited the level of bcl-2 and survivin expression.</p><p><b>CONCLUSION</b>Cantharidin can induce A549 cells apoptosis mainly via regulation of Bax, bcl-2 and survivin expression.</p>