Research progress on the antitumor effect of flavonoid derivatives / 药学学报

Malignant tumors seriously endanger human life and health, and their treatment has always been a research focus of scientists all over the world. Natural flavonoids and their derivatives have a variety of biological activities, especially regarding antitumor growth, with unique biological activities. They can interfere with the growth cycle of tumor cells, change the mitochondrial membrane potential, promote apoptosis, and can reduce the immune escape of tumor cells and prevent tumor metastasis by improving human immunity. In the human body, they regulate the biological signal transduction, leading to the up-regulation of pro-apoptotic protein expression. They inhibit the growth of solid tumors by regulating the growth of vascular epithelial cells and blocking the formation of blood vessels in tumor tissue. Recent studies have shown that these compounds can play an important role in the treatment of various human tumors and are expected to be developed into new antitumor drugs. This review summarizes the recent research results on the antitumor mechanism of flavonoids and their ability to inhibit tumor growth.

Needs and Framework of Information Platform for Quality Control of Rehabilitation Medicine Using Internet with ICF Framework / 中国康复理论与实践

Objective:To analyse the needs and framework development of an information platform on quality control of rehabilitation medicine based on ICF. Methods:According to the demanding of the information on quality control of rehabilitation medicine and the principle of the Internet Plus, this study discussed how to collect standardized data based on the classification and coding system of ICF, and how to implement the clinic standardized procedure and the clinical rehabilitation pathway on the information platform. Meanwhile, the index system on the information platform was also discussed to make data comparable among regions and countries. Results:This information platform should implement standardized procedure of diagnosis and treatment of rehabilitation medicine, based on the concept of ICF and ICD-11. The index system of the information platform should be compatible and open exchange. The structure of the information platform should use the framework, data standard, categories and coding of ICF. Conclusion:An information platform based on the ICF framework, terminology system and coding system can meet the needs of rehabilitation medical quality control, data collection and analysis.

Evaluation of Functioning for Aging Patients with Stroke Using World Health Organization Disability Assessment Schedule 2.0 / 中国康复理论与实践

Objective:To apply World Health Organization Disability Assessment Schedule (WHODAS 2.0) as a tool to assess the functioning of the old patients after stroke. Methods:From August, 2018 to February, 2019, 107 old inpatients with stroke were divided into four groups according to the course of disease: ≤ 6 months, 7-12 months, 13-18 months and 19-24 months. They were assessed with WHODAS 2.0 and modified Barthel Index (MBI) at admission and discharge. Results:The scores of both MBI and total WHODAS 2.0 improved at discharge (t > 2.481, P < 0.001). WHODAS 2.0 total scores decreased with the course of disease (F = 3.444, P < 0.05), but no significant decrease was found in the domains of Getting Along, Life Activities and Participation (F < 2.410, P > 0.05). WHODAS 2.0 total scores negatively correlated with MBI score (r = -0.540, P < 0.001), except the scores of domains of Life Activities and Participation (r = 0.184, P > 0.05). Conclusion:WHODAS 2.0 can be used as a tool to assess and follow up the function and disability of old stroke patients.

Research progress of puerarin and its derivatives on anti-inflammatory and anti-gout activities / 中国中药杂志

The research progress of puerarin and its derivatives in anti-inflammatory and anti-gout activities was reviewed in this paper. Puerarin possesses anti-inflammatory activity by affecting immunocyte, inflammation cytokines and signaling pathway. Puerarin also has anti-gout activity through inhibition of xanthine oxidase, promoting the excretion of uric acid to reduce serum uric acid level. Although its ability in reducing uric acid level was lower than that of allopurinol in clinical application, puerarin can also enhance the total antioxidant and free radical scavenging with stronger anti-inflammatory effect, so it will be a promising research direction to find new drugs with better anti-gout activity and less side effects by modifying the chemical structure of puerarin.

Study on hemolytic mechanism of polyphyllin II / 中国中药杂志

To study the hemolytic effect of polyphyllin II (PP II) mediated by anion channel protein and glucose transporter 1 (GLUT1), in order to initially reveal its hemolytic mechanism in vitro. In the experiment, the spectrophotometric method was adopted to detect the hemolysis of PP II in vitro and the effect of anion channel-related solution and blocker, glucose channel-related inhibitor and multi-target drugs dehydroepiandrosterone (DHEA) and diazepam on the hemolysis of PP II. The scanning electron microscope and transmission electron microscope were used to observe the effect of PP II on erythrocyte (RBC) morphology. The results showed that PP II -processed blood cells were severely deformed into spherocytes, acanthocyturia and vesicae. According to the results of the PP II hemolysis experiment in vitro, the anion hypertonic solution LiCl, NaHCO3, Na2SO4 and PBS significantly inhibited the hemolysis induced by PP II (P < 0.05), while blockers NPPB and DIDS remarkably promoted it (P < 0.01). Hyperosmotic sodium chloride, fructose and glucose at specific concentrations notably antagonized the hemolysis induced by PP II (P < 0.05). The glucose channel inhibitor Cytochalasin B and verapamil remarkably antagonized the hemolysis induced by PP II (P < 0.01). The hemolysis induced by PP II could also be antagonized by 1 gmol x L(1) diazepam and 100 μmol x L(-1) DHEA pretreated for 1 min (P < 0.01). In conclusion, the hemolytic mechanism of PP II in vitro may be related to the increase in intracellular osmotic pressure and rupture of erythrocytes by changing the anion channel transport activity, with GLUT1 as the major competitive interaction site.

Exome sequencing identifies compound heterozygous PKHD1 mutations as a cause of autosomal recessive polycystic kidney disease / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Autosomal recessive polycystic kidney disease (ARPKD) is a rare inherited disease, which is a disorder with multiple organ involvement, mainly the kidney and liver. It is caused by mutations in the PKHD1 gene. Here, we reported the clinical characteristics of a case with ARPKD and analyze the genetic features of this patient as well as of his father using targeted exome sequencing and Sanger sequencing.</p><p><b>METHODS</b>Genomic DNA was extracted from peripheral blood leukocytes obtained from a patient with ARPKD. The mutations were identified using exome sequencing and confirmed by Sanger sequencing.</p><p><b>RESULTS</b>The patient was diagnosed as ARPKD based on ultrasonography and abdominal computed tomography which showed polycystic changes, multiple calcinosis of both kidneys, and multiple dilated bile ducts of the liver. Compound heterozygous PKHD1 gene mutations A979G and G5935A, which lead to substitution of an asparagine for an aspartate at amino acid 327 (N327D) and a glycine for an arginine at amino acid 1979 (G1979R) respectively, were identified using targeted exome sequencing and confirmed by Sanger sequencing for the patient. In addition, the father of the patient was identified to be a carrier of heterozygous A979G mutation of this gene.</p><p><b>CONCLUSIONS</b>We identified that the compound heterozygous PKHD1 gene mutations are the molecular basis of the patient with ARPKD. Targeted exome sequencing is suitable for genetic diagnosis of single-gene inherited diseases like ARPKD in which the pathogenic gene is a large.</p>

Diltiazem enhances food intake and gastrointestinal function in rats / 生理学报

The present study was to investigate the effects of diltiazem, a ghrelin receptor agonist, on food intake and gastrointestinal functions in rats. Rats were intragastrically administered with diltiazem solution (daily 16 mg/kg, 30 mg/kg or 80 mg/kg, 30 d), and the rats with saline as control. To detect the effects of diltiazem on food intake and body weight, the average daily food intake and body weight were recorded, and the serum metabolic hormones of plasma growth hormone (GH) and neuropeptide Y (NPY) were tested by radioimmunoassay. By means of the spectrophotometer and the modified Mett's method, the effects of diltiazem on rat's gastrointestinal function and pepsin activity were tested, respectively. In addition, the gastric juice's acidity of rats was detected by titration and the secretion amount was calculated. The results showed that the food intake and body weight were maximally promoted by diltiazem at the dose of 30 mg/kg daily (30 d). The average daily food intake and body weight were significantly increased, and the serum concentrations of GH and NPY were also remarkably increased in diltiazem-treated groups compared with those in control group. The results also showed that the gastric emptying rate, gastric acid secretion and the activity of pepsin were significantly increased in diltiazem-treated group compared with those in control group. These results suggest that diltiazem induces enhancement of eating, in the same time, it can also stimulate the gastrointestinal function and regulate growth of rat.

Osteomalacia and osteoporosis associated with primary intestinal lymphangiectasis / 中华医学杂志(英文版)

Primary Intestinal lymphangiectasia (PIL) is a common cause of protein losing enteropathy (PLE). It will affect enter-hepatic circulation of lipid-soluble vitamin, and absorption of electrolytes, cause malnutrition related osteomalacia or osteoporosis. While seldom health care workers noted to assess and treat osteomalacia or osteoporosis in PIL. Here we report a related case. We found increased parathyroid hormone, decreased 25(OH)D3, low bone mineral density, which indicated that the PIL patient had osteomalacia and/or osteoporosis. Adequate calcium and vitamin D supply can relieve the condition efficaciously. We should pay attention to osteomalacia and osteoporosis in PIL patients.

Application of Ligasure vessel sealing instrument in laparoscopic hepatectomy for liver cancer / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the indication and effect of the application of Ligasure vessel sealing instrument in laparoscopic hepatectomy for liver cancer.</p><p><b>METHODS</b>Eleven patients with liver cancer undergoing laparoscopic hepatectomy were analyzed for the tumor size and location, operation time, volume of intraoperative bleeding, postoperative hospital stay and short-term clinical outcomes.</p><p><b>RESULTS</b>All the operations were performed successfully in the 11 cases. All the tumors were less than 7 cm in diameter, locating at the segments II, III, V, VI and VII. The mean operation time was 91 min (80-126 min), and the intraoperative blood loss averaged 82 ml (20-200 ml). The average postoperative hospital stay of the patients was 8 days (7-9 days). No complications were observed in these cases.</p><p><b>CONCLUSION</b>Ligasure vessel sealing instrument in laparoscopic hepatectomy is applicable in cases of perimeter liver cancer. This instrument can decrease the operation time, reduce the intraoperative blood loss and postoperative hospital stay with good safety and minimal invasiveness.</p>

Influence of different penetration enhancers on Lappaconitine transcutaneous permeation / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effects of different kinds and concentration of transdermal enhancers on Lappaconitine transcutaneous permeation when used individually or together.</p><p><b>METHOD</b>Using modified Franz-type diffusion cell and excised human body skin as an in vitro transdermal model, the concentration of lappaconitine was determined by HPLC, then cumulative permeation quantity (Q) and stability rate (J) of progesterone were calculated.</p><p><b>RESULT</b>Penetration enhancers such as propylene glycol, dodecanol, IPM, and particularly 3% OA and Azone, can significantly enhance the penetration rate of lappaconitine. Concentration effect of penetration enhancers concentration on lappaconitine transcutaneous permeation were found in experiments, the permeation effect of Azone was better than Azone + OA and Azone + propylene glycol.</p><p><b>CONCLUSION</b>The transdermal rate of lappaconitine from batch which contains 3% OA or Azone is higher than others. Combination of Azone with other penetration enhancers is not recommended for Lappaconitine transcutaneous permeation.</p>

Study of HIV-1 Drug Resistance in Patients Receiving Free Antiretroviral Therapy in China / 中国病毒学

To investigate the prevalence of drug-resistance mutations, resistance to antiretroviral drugs, and the subsequent virological response to therapy in treatment-naive and antiretroviral-treated patients infected with HIV/AIDS in Henan, China, a total of 431 plasma samples were collected in Queshan county between 2003 and 2004, from patients undergoing the antiretroviral regimen Zidovudine + Didanosine + Nevirapine (Azt+Ddi+Nvp). Personal information was collected by face to face interview. Viral load and genotypic drug resistance were tested. Drug resistance mutation data were obtained by analyzing patient-derived sequences through the HIVdb Program (http://hivdb.stanford.edu). Overall, 38.5% of treatment-naive patients had undetectable plasma viral load (VL), the rate significantly increased to 61.9% in 0 to 6 months treatment patients (mean 3 months) (P＜0.005) but again significantly decrease to 38.6% in 6 to 12 months treatment patients (mean 9 months) (P＜0.001) and 40.0% in patients receiving more than 12 months treatment (mean 16 months) (P＜0.005). The prevalence of drug resistance in patients who had a detectable VL and available sequences were 7.0%, 48.6%, 70.8%, 72.3% in treatment-na(1)ve, 0 to 6 months treatment, 6 to 12 months treatment, and treatment for greater than 12 months patients, respectively. No mutation associated with resistance to Protease inhibitor (PI) was detected in this study. Nucleoside RT inhibitor (NRTI) mutations always emerged after non-nucleoside RT inhibitor (NNRTI) mutations, and were only found in patients treated for more than 6 months, with a frequency less than 5%, with the exception of mutation T215Y (12.8%, 6/47) which occurred in patients treated for more than 12 months. NNRTI mutations emerged quickly after therapy begun, and increased significantly in patients treated for more than 6 months (P＜0.005), and the most frequent mutations were K103N, V106A, Y181C, G190A. There had been optimal viral suppression in patients undergoing treatment for less than 6 months in Queshan,Henan. The drug resistance strains were highly prevalent in antiretroviral-treated patients, and increased with the continuation of therapy, with many patients encountering virological failure after 6 months therapy.

Lymph node micrometastases and expression of metastasis-related gene proteins in patients with colorectal cancer / 中华外科杂志

<p><b>OBJECTIVE</b>To study lymph node micrometastases (LNMM), expression of nm23-H(1), MMP(9), TIMP(2) proteins, and their relationship and clinical significance in patients with stage Dukes B colorectal cancer.</p><p><b>METHODS</b>Thirty patients with stage Dukes B colorectal cancer were studied. LNMM in these patients was detected by immunohistochemical anti-cytokeratin 20 (CK20) staining. The expression of nm23-H(1), MMP(9) and TIMP(2) proteins in primary tumors was examined by Strept-avidin-biotin complex method. Clinical-pathological data and survival of each patient were recorded and analyzed.</p><p><b>RESULTS</b>(1) The positive dyeing of CK20 was observed in 26.7% for cases and in 7.8% for lymph nodes of 30 patients with stage Dukes B colorectal cancer. (2) Different expression of nm23-H(1) and MMP(9) proteins in the patients between stage Dukes B and stage Dukes CD was observed (P < 0.05). The decreased nm23-H(1) expression, and/or the increased MMP(9) expression in primary stage Dukes B tumors were significantly associated with LNMM (P < 0.05). Sensitivity and specificity for detection of LNMM by using nm23-H(1) or MMP(9) were respectively 62.5% and 81.8% or 75.0% and 69.8%. If by combining nm23-H(1) with MMP(9), specificity for detection of LNMM became 90.9%. The expression of TIMP(2) protein was not related with stage Dukes and LNMM. (3) The percent of tumor recurrence and/or metastasis for the stage Dukes B patients with LNMM was significantly higher than that for the patients without LNMM (P < 0.05), but the survival percent for the patients with LNMM was significantly lower than that for the patients without LNMM. The outcome for the patients with nm23-H(1) (-) LNMM (+) or MMP(9) (+) LNMM (+) was significantly worse than that for patients with nm23-H(1) (+) LNMM (-) or MMP(9) (+) LNMM (-) (P < 0.05).</p><p><b>CONCLUSIONS</b>LNMM is detected by immunohistochemical anti-CK20 staining. The expression of nm23-H(1) and MMP(9) in primary stage Dukes B tumors was significantly associated with LNMM. The outcome in the LNMM patients with nm23-H(1) (-) and/or MMP(9) (+) were worse. Combining examination of CK20 for lymph nodes with expression of nm23-H(1) and MMP(9) for primary tumors is of important clinical significance for staging of Dukes, selection of adjuvant treatment and evaluation of prognosis in patients with colorectal cancer.</p>

Clinical significance of detection on lymphatic microvessel, lymphatic microvessel density and vascular endothelial growth factor-C in patients with colorectal carcinoma / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To evaluate the clinical significance of detection on lymphatic microvessel, lymphatic microvessel density (LMVD) and vascular endothelial growth factor-C (VEGF-C) in patients with colorectal carcinoma.</p><p><b>METHODS</b>Eighty tissue specimens of the colorectal carcinoma and the peritumoral tissue and thirty of adjacent normal bowel tissue were collected. The lymphatic microvessel and LMVD were determined by 5'-nucleotidase histochemical staining. The expression of VEGF-C protein and VEGF-C mRNA in specimens of colorectal carcinoma and normal colorectal tissues were studied by RT-PCR and immunohistochemical methods utilizing strept-avidin-biotin complex. Clinicopathological data and survival of each patient were obtained and analyzed.</p><p><b>RESULTS</b>(1) The brown or filemot stained lymphatic microvessels were observed in specimens from the colorectal carcinoma, the peritumoral tissue and the normal bowel. Collapsed, nonfunctional lymphatic vessels were observed in the intratumoral tissue, and plenty of lymphatic vessels with large lumen referred as functional lymphatic vessels were observed in the peritumoral tissue. (2) The mean value of LMVD in the peritumoral tissue was significantly higher than that in the normal bowel tissue (9.76+/-2.85 vs. 5.49+/-1.43, t=8.220, P<0.01) and tumor tissue (9.76+/-2.85 vs. 2.13+/-0.96, t=15.118, P<0.001). (3) The positive rate (48.8% vs. 0, P<0.01) and mean value (1.09+/-1.20 vs. 0, P<0.01) of the VEGF-C protein expression in colorectal carcinoma specimens were significantly higher than that of the normal bowel tissue. The expression of VEGF-C protein was consistent with the expression of VEGF-C mRNA. The VEGF-C expression in intratumoral tissue demonstrated significant correlation with LMVD in the peritumoral tissue of colorectal carcinoma. (4) Both LMVD in the peritumoral tissue and the expression of VEGF-C in the intratumoral tissue correlated significantly with Dukes' stage (P<0.0001 and P=0.0234), lymph node metastasis (P<0.0001 and P=0.0059), and survival (P<0.0001 and P<0.0001), but not with age, sex, location and dimension of lesion, gross and histological type. Also, there was a positive significant correlation of LMVD in the peritumoral tissue with degree of differentiation (P=0.0168) and metastasis to the liver or the lung (P=0.0088).</p><p><b>CONCLUSIONS</b>Lymphatic microvessels in the peritumoral tissue are functional. The functional lymphatic microvessels, increased LMVD in the peritumoral tissue and the expression of VEGF-C in the intratumoral tissue may act as the morphological features and the molecular phenotype of lymphangiogenesis in colorectal carcinoma, and also as important predictive markers for evaluating lymphatic metastasis and prognosis in patients with colorectal carcinoma.</p>

Construction of a baculovirus transfer vector and expression of baculovirus-mediated gfp gene in larvae of Spodoptera litura / 生物工程学报

To construct a novel baculovirus expression system of Spodoptera litura multicapsid nucleopolyhedrovirus, the 5' end and 3' end-flanking fragments of ph gene were amplified from the genome DNA of SpltMNPV, Japan-C3 strain using two pairs of primers synthesized according to SpltMNPV China-G2 strain genome DNA sequence published in GenBank. To obtain the transfer vector pSplt-gfp, the fragment of gfp gene was inserted into this vector between two fragments tandem linked into pUC18. The spli cells were cotransfected with pSplt-gfp and the wild SpltMNPV genome DNA. The recombinant virus containing gfp was selected with the limited dilution method. The fluorescence can be observed in the spli cells and the 3rd instar larvae after 24 and 48 hours by infection of the recombinant virus, respectively. The result showed that the recombinant virus was obtained successfully. It will be helpful to establish Spodoptera litura multicapsid nucleopolyhedrovirus expression system and more effective pesticide for Spodoptera litura.