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Keratoconus is a chronic, non-inflammatory corneal disease, characterized by thinning of the corneal stroma and local corneal dilation with cone-shaped protrusion, and it usually leads to irregular astigmatism and myopia, posing great threat to eyesight. Corneal topography is the primary diagnostic tool for confirming keratoconus, while optical coherence tomography is now playing an increasingly important role in the diagnosis and treatment of keratoconus due to its ability of corneal sublayer imaging and superiority in repeatability, resolution, and data acquisition speed. This article discusses and reviews the clinical characteristics of keratoconus, the classification and characteristics of optical coherence tomography and its novel applications in the early diagnosis of keratoconus, contact lens fitting, corneal cross-linking therapy, and corneal transplantation; furthermore, progress in derivative technologies including optical coherence elastography, optical coherence tomography angiography, and polarization-sensitive optical coherence tomography associated with keratoconus is included in this article. We hope our study will help to further exploit the role of optical coherence technology in clinical keratoconus management.
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Aim To investigate the protective effects of different doses Gualou Xiebai Decoction (GXD) on type II cardiorenal syndrome (type II CRS) and explore its preliminary mechanisms. Methods The type II cardiorenal syndrome rat model was replicated by li-gating the left anterior descending coronary artery. After 10 weeks of intragastric administration, the cardiac function of the rats in each group was evaluated by echocardiography; serum were collected for biochemical testing; heart and kidney tissue samples were stained with HE and Masson to observe pathological changes. The hydroxyproline content in the heart and kidney was detected. The expression levels of endothelial/epitheli-al-to-mesenchymal transition (EndMT/EMT) related proteins in heart and kidney tissues were detecterd by immunofluorescence double staining
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Aim To investigate the effects of dichloroacetate(DCA)combined with vitamin C(VC)on the malignant behavior of glioma U87 and U251 cells, and to explore the potential mechanism. Methods U87 and U251 cells were treated with different concentrations of DCA alone or in combination with 5 mmol·L-1 VC. The proliferation rate of each group was detected by CCK-8 method and the cooperative index was calculated. U87 and U251 cells were treated with DMSO, 15 mmol·L-1 DCA, 5 mmol·L-1 VC and their combination. The changes of clonal formation, reactive oxygen species content, apoptosis, cell cycle, migration and invasion were detected via in vitro experiments, while the proliferation of U251 cells in vivo in each group was detected by subcutaneous tumor-forming model. Western blot was used to detect the expression levels and degradation rates of BCL2A1 and CDC25A in each group of cells after network pharmacological analysis of DCA and VC targets and their value in glioma, and the expression levels of CDK4, CDK6, cytochrome C, caspase-7 and cleaved-caspase-7 were detected. Results The combined index of 15 mmol·L-1 DCA and 5 mmol·L-1 VC was the highest. Compared with the control and single drug groups, the clonal formation, migration and invasion ability of cells in combination group in vitro significantly decreased, the proliferation rate in vivo also decreased, and the content of reactive oxygen species, apoptosis rate and G1 phase arrest rate significantly increased. BCL2A1 and CDC25A proteins were important targets of DCA and VC in glioma. Compared with the control and single-drug groups, the expression levels of BCL2A1, CDC25A, CDK4, and CDK6 in the combination group were significantly reduced, and the expression levels of cytochrome C and cleaved-caspase-7 markedly increased, and the protein degradation rates of BCL2A1 and CDC25A significantly increased in the combination group. Conclusions VC can cooperate with DCA to promote the degradation of BCL2A1 and CDC25A, and inhibit the malignant behavior of glioma cells.
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Objective To observe the effects of 4-week low intensity treadmill exercise on the learning and memory, amino acid levels and the protein expression of protein kinase A ( PKA) , cyclic adenosine monophosphate response element binding protein( CREB) and brain-derived neurotrophic factor(BDNF) in the prefrontal cortex (PFC) of the vascular dementia (VD) rats. Methods Thirty-nine SD rats were randomly allocated to 3 groups, sham group (sham, n= 13) , vascular dementia group (VD, n= 13) and vascular dementia treaded with exercise group (VD + EX, n= 13). Chronic cerebral ischemia model in VD group and VD+EX group rats were established by permanent ligation of bilateral, then VD+EX group rats were submitted to 4-week low intensity treadmill exercise. After exercise, spatial learning and memory ability were evaluated by Moms water maze test ( MWM ) , glutamic ( Glu ) and gamma-aminobutyric acid (GABA) levels in the PFC were measured by high performance liquid chromatography( HPLC) ; the protein expression of PKA, CREB and BDNF in the PFC of rats were detected by Western blotting. Results The result of the MWM showed the average escape latency of rats in the VD group on the 1 -5 days was significantly higer than sham group, the time to first find the original platform was significantly prolonged and the platform crossings decreased significantly ( P 0. 05 ) between the two groups. Conclusion Four-week low-intensity running exercise improves the learning and memory ability of VD rats through enhancing the Glu level and activating PKA-CREB-BDNF signaling in the PFC of rats.
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We analyzed the clinical and biochemical characteristics of Japanese encephalitis(JE),based on acute meningeal and encephalitis syndrome(AMES)surveillancein Baoji from 2013 to 2021.We established the AMES program in Baoji and de-veloped surveillance according to the case definition.JE virus IgM antibody tests were conducted.Positive cases were divided in-to a probable JE and non-probable JE group according to the initial diagnosis.Clinical manifestations and biochemical character-istics of cerebrospinal fluid were compared between groups.The difference in JE incidence in the Baoji area and Shaanxiprovince before and after the AMES program was compared.Among 2 636 AMES cases reported during 2013-2021,the positive rate of JE virus IgM antibody was 5.99％,of which 86 cases(54.43％)lacked an initial JE diagnosis.The proportion of patients with fever,perturbed consciousness,neck rigidity,or meningeal irritation was significantly higher in the group with than without an initial JE diagnosis(P＜0.05).Biochemical tests indicated that the differences in cerebrospinal fluid color,white blood cell count,and chloride and glucose levels in the two groups were not statistically significant(P＞0.05).Cases of JE in Baoji from 2005 to 2012 accounted for 10.65％(134/1258)vs 16.58％(161/971).This study indicated that the AMES surveillance pro-gram increased the detection of JE and has aided in JE diagnosis.Thus,AMES surveillance should be enhanced.
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OBJECTIVE@#To explore the expression patterns, prognostic implications, and biological role of leukotriene B4 receptor (LTB4R) in patients with acute myeloid leukemia (AML).@*METHODS@#We collected the data of mRNA expression levels and clinical information of patients with AML from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) database for mRNA expression analyses, survival analyses, Cox regression analyses and correlation analyses using R studio to assess the expression patterns and prognostic value of LTB4R. The correlation of LTB4R expression levels with clinical characteristics of the patients were analyzed using UALCAN. The co-expressed genes LTB4R were screened from Linkedomics and subjected to functional enrichment analysis. A protein-protein interaction network was constructed using STRING. GSEA analyses of the differentially expressed genes (DEGs) were performed based on datasets from TCGA-LAML stratified by LTB4R expression level. We also collected peripheral blood mononuclear cells (PBMCs) from AML patients and healthy donors for examination of the mRNA expression levels of LTB4R and immune checkpoint genes using qRT-PCR. We also examined serum LTB4R protein levels in the patients using ELISA.@*RESULTS@#The mRNA expression level of LTB4R was significantly increased in AML patients (4.898±1.220 vs 2.252±0.215, P < 0.001), and an elevated LTB4R expression level was correlated with a poor overall survival (OS) of the patients (P=0.004, HR=1.74). LTB4R was identified as an independent prognostic factor for OS (P=0.019, HR=1.66) and was associated with FAB subtypes, cytogenetic risk, karyotype abnormalities and NPM1 mutations. The co- expressed genes of LTB4R were enriched in the functional pathways closely associated with AML leukemogenesis, including neutrophil inflammation, lymphocyte activation, signal transduction, and metabolism. The DEGs were enriched in differentiation, activation of immune cells, and cytokine signaling. Examination of the clinical serum samples also demonstrated significantly increased expressions of LTB4R mRNA (P=0.044) and protein (P=0.008) in AML patients, and LTB4R mRNA expression was positively correlated with the expression of the immune checkpoint HAVCR2 (r= 0.466, P=0.040).@*CONCLUSION@#LTB4R can serve as a novel biomarker and independent prognostic indicator of AML and its expression patterns provide insights into the crosstalk of leukemogenesis signaling pathways involving tumor immunity and metabolism.
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Humans , Leukemia, Myeloid, Acute/metabolism , Leukocytes, Mononuclear/metabolism , Prognosis , RNA, Messenger/metabolism , Receptors, Leukotriene B4/geneticsالملخص
The occurrence and development of malignant tumors seriously affect the survival time and quality of life of people all over the world， and finding proper treatment methods has been a focus for doctors. Especially in recent years， traditional Chinese medicine （TCM） has developed and attracted the attention of doctors and patients. From the perspective of TCM syndrome differentiation and treatment， deficiency and stasis are the most fundamental causes of malignant tumors， and supplementing deficiency and removing stasis can be regarded as the basic criteria of TCM treatment of malignant tumors. TCM prescriptions can treat diseases by means of multiple components and multiple targets， with the characteristics of slight side effect and high efficacy， safety and cost performance， as well as easiness to be accepted and taken. As a classic recipe for invigorating Qi and generating blood， Danggui Buxuetang consists of Astragali Radix -Angelicae Sinensis Radix 5∶1. It has excellent effects in anti-tumor， bone marrow suppression after chemotherapy， immune function decline， anemia， heart and cerebral vessels protection， blood deficiency-led fever， diabetes， anti-atherosclerosis， anti-fatigue， anti-radiation， myocardial ischemia alleviation， inhibition of platelet aggregation， liver damage， etc. In addition， with many active anti-tumor ingredients， Danggui Buxuetang can exert anti-tumor effects via acting on multiple targets in different binding sites. However， there has been a lack of reviews on the role of Danggui Buxuetang in malignant tumors so far. Therefore， in this paper， the functions of Danggui Buxuetang in malignant tumors were reviewed. Besides， molecular docking technology was used to analyze the main active anti-tumor ingredients and action targets of Danggui Buxuetang.
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OBJECTIVE@#Traditional epidemiological studies have shown that C-reactive protein (CRP) is associated with the risk of cardiovascular diseases (CVDs). However, whether this association is causal remains unclear. Therefore, Mendelian randomization (MR) was used to explore the causal relationship of CRP with cardiovascular outcomes including ischemic stroke, atrial fibrillation, arrhythmia and congestive heart failure.@*METHODS@#We performed two-sample MR by using summary-level data obtained from Japanese Encyclopedia of Genetic association by Riken (JENGER), and we selected four single-nucleotide polymorphisms associated with CRP level as instrumental variables. MR estimates were calculated with the inverse-variance weighted (IVW), penalized weighted median and weighted median. MR-Egger regression was used to explore pleiotropy.@*RESULTS@#No significant causal association of genetically determined CRP level with ischemic stroke, atrial fibrillation or arrhythmia was found with all four MR methods (all Ps > 0.05). The IVW method indicated suggestive evidence of a causal association between CRP and congestive heart failure ( OR: 1.337, 95% CI: 1.005-1.780, P = 0.046), whereas the other three methods did not. No clear pleiotropy or heterogeneity were observed.@*CONCLUSIONS@#Suggestive evidence was found only in analysis of congestive heart failure; therefore, further studies are necessary. Furthermore, no causal association was found between CRP and the other three cardiovascular outcomes.
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Humans , C-Reactive Protein/metabolism , Cardiovascular Diseases/metabolism , Genetic Predisposition to Disease , Genotype , Japan , Mendelian Randomization Analysis , Polymorphism, Single Nucleotide , Risk Factorsالملخص
This paper discussed the guiding significance of "disease-syndrome-symptom" mode in FU Qing-zhu's Obstetrics and Gynecology(FU Qing-zhu Nyu Ke) for dealing with ovulation disorder infertility caused by hyperprolactinemia(HPRL). FU Qing-zhu's Obstetrics and Gynecology(FU Qing-zhu Nyu Ke) concentrates on the disease entities, main symptoms, pathogenesis, and syndrome differentiation, based on which the prescriptions are prescribed. This reflects the "disease-syndrome-symptom" mode, with the core lying in the "combination of disease with syndrome". The contained Discussion on Menstruation Regulation(Tiao Jing Pian) and Discussion on Getting Pregnant(Zhong Zi Pian) have important reference significance for later doctors in the diagnosis and treatment of inferti-lity, and many prescriptions are still in use due to good effects. It is believed in traditional Chinese medicine(TCM) that HPRL results from kidney deficiency and liver depression, among which kidney deficiency is the main cause. Liver depression accelerates the onset of HPRL, so the kidney-tonifying and liver-soothing herbs were mainly selected. The "disease-syndrome-symptom" mode in FU Qing-zhu's Obstetrics and Gynecology(FU Qing-zhu Nyu Ke) sheds enlightenment on the diagnosis and treatment of ovulation infertility caused by HPRL, in that it is not confined to disease entity and syndrome type. The integration of "disease-syndrome-symptom" highlights the main complaint of patients and emphasizes the main pathogenesis, thus giving full play to the overall advantage of syndrome differentiation. For multiple diseases in FU Qing-zhu's Obstetrics and Gynecology(FU Qing-zhu Nyu Ke) such as infertility due to liver depression, infertility due to obesity, delayed menstruation, and irregular menstruation, although the typical lactation symptom of HPRL is not mentioned, the medication can still be determined according to the chief complaint, syndrome type, and symptoms and signs, making up for the defects of excessive reliance on serum biochemical indicators in modern Chinese medicine. We should learn its diagnosis and treatment thoughts of paying attention to liver, spleen, kidney, and heart, holism, and strengthening body resistance to eliminate pathogenic factors.
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Female , Humans , Pregnancy , Gynecology , Hyperprolactinemia/drug therapy , Infertility , Obstetrics , Ovulationالملخص
Traditional Chinese medicine(TCM) carries the experience and theoretical knowledge of the ancients, and the use of "toxic" Chinese medicines is a major feature and advantage of TCM. "Toxic" Chinese medicines have unique clinical value and certain medication risk under the guidance of TCM theories such as compatibility for detoxification and treatment based on syndrome differentiation. In recent years, the safety events of Chinese medicines have occurred frequently, which has made the safety of Chinese medicine a public concern in China and abroad. However, limited by conventional cognitive laws and technical methods, basic research on toxicity of Chinese medicines fails to be combined with the clinical application. As a result, it is difficult to identify the clinical characteristics of, predict toxic and side effects of, or form a universal precise medication regimen for "toxic" Chinese medicines, which restricts the clinical application of them. In view of the problem that the toxicity of "toxic" Chinese medicines is difficult to be predicted and restricts the clinical application, the evidence-based research concept will provide new ideas for safe applcation of them in clinical practice. The integrated development of multiple disciplines and techniques in the field of big data and artificial intelligence will also promote the renewal and development of the research models for "toxic" Chinese medicines. Our team tried to propose the academic concept of evidence-based Chinese medicine toxicology and establish the data-intelligence research mode for "toxic" Chinese medicines and the intelligent risk prediction method for medicinal combination in the early stage, which provided methodological supports for solving the above problem. Thus, on the basis of summarizing the research status and problems of the clinical medication regimen of "toxic" Chinese medicines, our team took the evidence-based toxicology of TCM as the core concept, and tried to construct the multiple-evidence integrated evaluation and prediction method for "toxic" Chinese medicine, so as to guide the establishment of the non-toxic medication regimen of "toxic" Chinese medicines. Specifically, through the analysis of multivariate data obtained from the basic research, the evidence-based toxicology database of Chinese medicines and the individualized "toxicity-effect" intelligent prediction platform were built based on the disease-syndrome virtual patients, so as to identify the clinical characteristics and risks of "toxic" Chinese medicines and develop individualized medication regime. This study is expected to provide a methodological reference for the establishment of medication regimen and risk prevention strategy for "toxic" Chinese medicines. The method established in this study will bridge clinical research and basic research, enhance the transformation of the scientific connotation of attenuated compatibility, promote the development of evidence-based Chinese medicine toxicology, and ensure the clinical safety of "toxic" Chinese medicines.
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Humans , Artificial Intelligence , China , Drugs, Chinese Herbal/pharmacology , Medicine, Chinese Traditional , Research Design , Syndromeالملخص
Aim To establish an in vitro fluorescence spectrophotometry based on the end-product malondialdehyde(MDA)for evaluating hydroxyl radical-scavenging ability, and compare the advantages and disadvantages of fluorescence and visible methods.Methods The reaction time, temperature, and the concentration of key reactant deoxyribose were investigated and optimized respectively.Under different solvent conditions, sensitivity and the measurement window of two methods were compared.The hydroxyl radical scavenging ability of tanshinone I was determined by these two methods.Results The optimal temperature and time was 37 °C and 60 min, and the concentration of deoxyribose was 2.8 mmol·L-1.The limit of detection for the fluorescence method(4.49 nmol·L-1)was much lower than that of the visible spectrophotometry(39.15 nmol·L-1).The ratio of model/control(the measurement window)of the fluorescence method was much larger than that of visible spectrophotometry in both the aqueous system and the organic system(containing DMSO).Within the concentrations of 62.5 mg·L-1-1 000 mg·L-1, tanshinone I showed scavenging ability on hydroxyl radicals in a concentration-dependent manner using the fluorescence method, but the visible method could not.Conclusions In contrast to visible method, fluorescence method has the advantages of higher sensitivity and stronger anti-interference ability to the color of test substance and the specificity of solvents.By virtue of large measurement window, it can be applied to evaluating the effect of fat-soluble test substances.
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Calycosin （CA）， a functional phytoestrogenic isoflavone extracted from Chinese herb Astragali Radix， is characterized by high efficiency， low toxicity， and multiple targets and has multiple pharmacological activities such as anti-oxidation， anti-radiation， anti-bacteria， cardio-cerebrovascular protection， and immunity enhancement. A number of studies have proved its significant anti-tumor effect， making it expected to become a potential component for the treatment of malignant tumors. Research shows that CA exerts the anti-tumor effect via multiple mechanisms like inducing tumor cell apoptosis and inhibiting tumor cell proliferation， migration， and invasion. It has been proved to be effective in suppressing breast cancer， colorectal cancer， lung cancer， cervical cancer， ovarian cancer， nasopharyngeal cancer， and other common malignant tumors. Its anti-tumor activity is mainly related to the regulation of B-cell lymphoma-2 （Bcl-2） family genes， microRNA （miRNA）， and estrogen receptor β （ERβ） to trigger tumor cell apoptosis. Its anti-proliferation activity is mainly reflected in the regulation of cyclin family， WD repeat-containing protein 7 （WDR7-7）， and Ewing sarcoma-associated transcript 1 （EWSAT1）. By blocking the epithelial mesenchymal transformation （EMT）， vascular endothelial growth factor （VEGF）， matrix metalloproteinases （MMPs）， CA inhibits tumor cell metastasis and invasion. In addition， it inhibits tumors by regulating autophagy marker Beclin-1 induced tumor cell autophagy and increases the sensitivity to chemotherapy drugs， thus improving the treatment effect. Although there are many reports about the wide range of applications and good effects of CA in anti-tumor， the systematic review of its anti-tumor mechanism is still lacking. Therefore， this study reviewed the anti-tumor effects and mechanisms of CA， aiming to provide reference for researchers and clinical workers.
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@#AIM: To explore the effect of corneal limbal trapezoid conjunctival flap incision and modified Parks incision on tear film function and postoperative complications in patients with strabismus.<p>METHODS: A prospective study was conducted in patients with strabismus who had been treated with surgery in the First Affiliated Hospital of Nanyang Medical College between January 2017 and October 2019. The subjects were divided into conjunctival flap incision group(60 cases with 82 affected eyes treated with strabismus surgery <i>via</i> corneal limbal trapezoid conjunctival flap incision)and modified Parks group(62 cases with 83 affected eyes treated with strabismus surgery <i>via</i> modified Parks incision). Therapeutic effects on strabismus were evaluated, and dry eye symptoms were scored before and after surgery. Schirmer I test(SⅠt), tear film break up time(BUT)and cornea fluorescein staining score(FL score)were recorded. Comprehensive ocular surface examination was performed to determine tear river height(TMH)and noninvasive keratograph tear breakup time(NIKBUT). Satisfaction with surgery was surveyed, and adverse reactions were statistically analyzed.<p>RESULTS: Both groups of patients completed the surgery. Totally 80 eyes and 79 eyes of the conjunctival flap incision group and the modified Parks group were basically in normal position(within±10PD), and there was no statistically significant difference in cure rate between the two groups(<i>P</i>>0.05). S I t and BUT of the modified Parks group were significantly higher than those of the conjunctival flap incision group at 7 and 14d after surgery, and the FL score was significantly lower than that of the conjunctival flap incision group at 7d after surgery(<i>P</i><0.05). TMH of the modified Parks group was significantly higher than that of the conjunctival flap incision group at 14d after surgery, and NIKBUT was significantly longer than that of the conjunctival flap incision group at 7d and 14d after surgery(<i>P</i><0.05). The overall incidence rates of complications in the conjunctival flap incision group and the modified Parks group were 7.3% and 2.4%, respectively(<i>P</i>>0.05). The overall satisfaction rates of the conjunctival flap incision group and the modified Parks group were 83.3% and 95.2%, respectively(<i>P</i><0.05).<p>CONCLUSION:Surgeries with corneal limbal trapezoid conjunctival flap incision or modified Parks incision can achieve good correction effects on strabismus, but surgery with modified Parks incision has less effect on tear film stability, with higher surgical satisfaction and better clinical application effect.
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OBJECTIVE@#To investigate the biomechanical affect of percutaneous transforaminal endoscopic discectomy(PTED) on adjacent segments with different degrees of degeneration and related risk of adjacent segment diseases (ASD) caused by this operation.@*METHODS@#A healthy male adult volunteer was selected, and the lumbosacral vertebra image data was obtained by CT scan, and the external contour of the bone structure was reconstructed. On this basis, the external contour of the bone structure was fitted by using the smooth curve in 3D-CAD software, and the complete three-dimensional finite element modelof the non degenerate L@*RESULTS@#In the finite element model without adjacent segmental disc degeneration, the annulus fibrosus von Mises stress and intradiscal pressure of the PTED model showed only a slight increase under most stress conditions, and a slight decrease in a few conditions, and there was no significant change trend before and after surgery. In the original degenerated adjacent segment disc model, the biomechanical indicators related to disc degeneration in the pre- and post-PTED model showed significant deterioration, leading to an increased risk of potential adjacent spondylopathy.@*CONCLUSION@#PTED surgery will not lead to the significant deterioration of postoperative biomechanical environment of non-degeneration adjacent intervertebral discs, and the original degeneration of adjacent intervertebral discs is a important risk factor for ASD.
الموضوعات
Adult , Humans , Male , Biomechanical Phenomena , Diskectomy, Percutaneous , Finite Element Analysis , Intervertebral Disc/surgery , Intervertebral Disc Degeneration/surgery , Lumbar Vertebrae/surgery , Range of Motion, Articularالملخص
OBJECTIVE@#To describe and analyze the status quo of cardiovascular clinical practice guidelines or expert consensuses including both Chinese medicine (CM) and integrative medicine, through systematic literatures searching and quality assessment.@*METHODS@#Data bases including Chinese Biomedical Literature Database, the China National Knowledge Infrastructure, Wanfang Data, China Science and Technology Journal Database were searched for published CM or integrative cardiovascular clinical practice guidelines or expert consensuses. The website www. medlive.cn was also retrieved as supplementary. The clinical practice evaluation tool AGREE II was used to assess the quality of included guidelines or consensuses.@*RESULTS@#A total of 31 relevant clinical practice guidelines or expert consensuses were included, covering diagnosis, treatment, Chinese patent and patient fields. Common cardiovascular diseases like coronary heart diseases, heart failure and arrhythmia were also involved. Through analysis it was found that both the quantity and quality of included guidelines have been improved year by year. A total of 4 evidence-based clinical practice guideline has been found, one of which was a guideline project plan. Except that, the remaining 27 reports were all consensus-based guidelines. The scores of each field, from highest to lowest, were clarity of presentation (58%), scope and purpose (54%), stakeholder involvement (28%), rigor of development (21%), applicability (13%) and editorial independence (8%).@*CONCLUSIONS@#Although clinical practice guidelines in cardiovascular domain of Chinese have gained increasing concern, with both quantity and quality improved, there is still huge gap in methodology and reporting standards between CM guidelines and international ones. On the one hand, it is essential to improve and standardize the methodology of developing CM guidelines. On the other hands, the evaluation system of evidence and recommendation with CM characters should be developed urgently.
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Irritable bowel syndrome (IBS) is one kind of functional gastrointestinal tract disorders with high incidence in the world. IBS is induced by avariety of factors,such as visceral hypersensitivity .abnormal gastrointestinal motility, intestinal barrier dysfunction, intestinal inflammation, neuro-immunity disorder, etc. The pathogenesis of IBS is complex and diverse. Mast cells (MCs) play an important role in the occurrence and development of IBS. The present article reviews the role of MCs both in the pathogenesis and in the treatment of IBS.
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Objective: To investigate the clinical effect of Xihuang Capsule combined with albumin paclitaxel in the treatment of advanced triple negative breast cancer. Methods: A total of 80 patients with advanced triple negative breast cancer admitted to Cangzhou Central Hospital were selected as the study subjects. All patients were randomly divided into the control group and the treatment group, with 40 patients in each group. Patients in the control group were given albumin paclitaxel for a cycle of 21 d, and received continuous treatment for at least three cycles. The difference between the treatment group was given six capules of Xihuang Capsules twice a day for one course of treatment for 21 d based on the treatment of control group. The clinical effects of the two groups were compared and analyzed. The KPS and VAS scores of the two groups of patients were evaluated, and the tumor markers and the incidence of adverse reactions after taking the drug were recorded for statistical analysis. Results: After treatment, the objective remission rate (ORR) was 60.0% in the control group and 75.0% in the treatment group. The disease control rate (CBR) was 77.5% in the control group and 85.7% in the treatment group. The difference between the two groups was statistically significant (P < 0.05). After treatment, KPS score and VAS score in the treatment group were significantly higher than those in the control group (P < 0.05). After treatment, CA-153 and CEA levels of tumor markers in both groups were significantly lower than those before treatment (P < 0.05), while CA-153 and CEA levels in the treatment group were lower than those in the control group (P < 0.05). The incidence of adverse reactions in the treatment group was significantly lower than that in the control group (P < 0.05). Conclusion: Xihuang Capsule combined with albumin paclitaxel has higher clinical efficacy and safety in patients with advanced triple negative breast cancer.
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Objective To explore the application of support vector regression (SVR) model combined with meteorological and air pollutants index in the prediction of the cases of bacillary dysentery in Lanzhou City, so as to provide scientific reference for the prevention and control of bacillary dysentery.Methods Time series data of the reported cases of bacillary dysentery from December 2013 to August 2016, combined with the meteorological and air pollutants data, were used as training set to fit support vector regression model. The data from September 2016 to December 2017 was used as validation set to verify the model and compare the effect in fit and prediction with different models. Results A total of 7 192 bacillary dysentery cases were reported in Lanzhou City from 2013 to 2017. The correlation coefficient of meteorological and pollution factors with the cases of bacillary dysentery was more than 0.4, except air pressure. The parameters of the fit model were selected based on the integrated data, acquiring the three parameters with the smallest test error were C=5, γ=0.02 and ε=0.000 1, respectively. The validation set was used to test the different models, which showed that the integrated data model had the best predictive accuracy and robustness . The root mean squared error (RMSE) was 0.164 7 and the mean absolute percentage error (MAPE) was 16.405%. Conclusion SVR model combined with meteorological and air pollutants index is effective in the prediction of bacterial dysentery.
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Arenaviruses are enveloped RNA viruses, and eight members in this family are known to cause human hemorrhagic fever. Treatments for the viral hemorrhagic fever (VHF) by arenaviruses are very limited. We have identified the first flavone, tangeretin, with broad-spectrum inhibitory activities on VHF-arenaviruses infection by blocking viral entry. In this study, we evaluated thirty-four tangeretin analogues and found 3,5,6,7,4'-pentamethoxyflavone as a Lassa virus entry inhibitor, with EC50 of 5.2 µmol·L-1, by blocking the viral fusion process. The compound 3,5,6,7,4'-pentamethoxyflavone is effective on all known VHF-arenaviruses, with EC50 range of 0.84-10.2 µmol·L-1. These results suggest that 3,5,6,7,4'-pentamethoxyflavone is able to serve as a start point for discovery of arenavirus entry inhibitors from flavone natural products.
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Mengla virus (MLAV), isolated from the bats in China, was identified as a new genus of filovirus in 2019, i.e. Dianlovirus genus of Filoviridae family. Among filoviruses, Ebola virus (EBOV) and Marburg virus (MARV) are the most contagious viruses with mortality rates of 24%-90%. Phylogenetic analysis showed that MLAV was closely related to MARV among the members of filovirus family. MLAV enters into host cells via viral glycoprotein (GP). The recombinant virus study indicated that MLAV has a potential for bat-to-human cross-species transmission. In this study, a GP-mediated MLAV entry evaluating model was established, and by using this model, we investigated the susceptibility of MLAV to the human cell lines sourced from different tissues and the African green monkey kidney cell lines. Four compounds, chloroquine, tetrandrine, clomiphene, and toremifene, which were known as EBOV and MARV entry blockers, were tested for HIV/MLAV-GP infection. It was found that chloroquine effectively blocked the entry of MLAV with the half maximal effective concentration (EC50) of 1.56 μmol·L-1, resembling its anti-EBOV and -MARV activities. To the best of our acknowledge, there is no anti-MLAV drug reported by far, and the identification of chloroquine as an MLAV entry inhibitor may provide an insight for developing anti-filovirus agents.