Objective To develop a method for determination of catechins and alkaloids in brick-tea by high performance liquid chromatography(HPLC) with diode array detection(DAD),and to explore optimum extraction conditions for catechins and alkaloids components in brick-tea.Methods Catechins and alkaloids were separated and detected by HPLC.Orthogonal experiment and paired t test was carried out to compare the effect of water and alcohol as extraction solvents and to obtain optimum extraction conditions for extracting catechins and alkaloids components in brick-tea.Results Six kinds of catechins of catechin,epicatechin,gallocatechin,epigallocatechin,epicatechin gallate,epigallocatechin gallate and two kinds of alkaloids of caffeine and theobromine were separated and detected simultaneously.Calibration curves between peak areas and concentration of each component in bricktea were linear within a suitable concentration range,and coefficients of determination (R2) were between 0.9990-0.9999; spiked recoveries were from 83.78％ to 106.35％,and relative standard deviations(RSD) were between 0.50％-1.51％.The optimum extraction condition for catechins and alkaloids was 80％ ethanol,solid-liquid ratio of 1:10,temperature 80 ℃ and extraction time 30 min.Conclusion Alcohol as extraction solvents with optimal combination on HPLC,six kinds of catechins and two kinds of alkaloids are separated accurately,qualitatively,rapidly and sensitively.

Objective To analyze the imaging appearances of solitary fibrous tumors (SFT) of the lower limb.Methods The imaging manifestations of SFT of the lower limb proved with pathology in 2 patients were reported and the relevant literatures were reviewed.All patients underwent MR examination,and 1 received skeletal radiography.Results Both tumors were mainly located within the biceps muscle of thigh.MR demonstrated that the tumor appeared as a solitary round or oval well circumscribed mass,with inhomogeneous low to intermediate intensity signal on T1WI and heterogeneous low to high intensity signal on T2WI.Inhomogeneous enhancement was demonstrated on T1WI.Marked enhancement of solid components in the tumor was identified.No bone destruction was found on plain film.Conclusion There are some characteristics on the imaging of SFT of the lower extremity.MRI is the optimal imaging method for the diagnosis of this disease.

Chlorine ; Computer Simulation ; Computers, Analog ; Diffusion ; Software

The evolution of the quality control concepts of medical products within the global context and the development of the quality control technology of Chinese medicine are briefly described. Aimed at the bottlenecks in the regulation and quality control of Chinese medicine, using Big Data technology to address the significant challenges in Chinese medicine industry is proposed. For quality standard refinements and internationalization of Chinese medicine, a technological innovation strategy encompassing its methodology, and the R&D direction of the subsequent core technology are also presented.
Data Mining ; Databases, Factual ; Drug Industry ; organization & administration ; standards ; Drugs, Chinese Herbal ; analysis ; pharmacology ; standards ; Humans ; Quality Control

0 05), but MTT had significant difference( F =10 2, P

Objective To understand the schistosomiasis epidemic situation among migrant population,so as to assess the potential risk of schistosomiasis transmission in Haining City. Methods Five districts in Haining City were randomly selected to investigate the schistosomiasis endemic situation in migrant population from the schistosomiasis endemic provinces. Results Totally 1207 persons were investigated and four positives were found in serological tests,with the positive rate of 0.33%,but no patients were found in pathologic tests. The positive cases in serological tests were mainly between 31-40 years old,with the pos-itive rate of 1.68%,which was higher than that of other age groups( χ2 = 6.590,P < 0.05). Conclusion The schistosomiasis surveillance work in migrant population still should be strengthened in Haining City.

Objective To observe the therapeutic effect of antiangiogenesis on C6 glioma and to study the practical value of PWI in evaluating the early response of the tumor to the treatment.Methods C6 glioma cells were stereotactically implanted into SD rats intracranially.At the 15 day after tumor implantation,the recombinant human endostatin was administered or stereotactic radiosurgery was performed.Endostatin was injected subcutaneously at the dose of 5 mg?kg -1 ?d -1 ,10 mg?kg -1 ?d -1 ,and 20 mg?kg -1 ?d -1 for 7 days.Stereotactic radiosurgery was given once with the central radiation dose of 25Gy.MR PWI was performed to measure relative cerebral blood volume (rCBV) of the tumor and the normal brain before and 48 hours after treatment.Conventional MRI was performed to calculate tumor volume.Results The tumor volume was (429.0?36.7)mm 3,(305.7?32.8)mm 3,and (277.0?20.6)mm 3 in each endostatin treated group,and(390.0?33.8)mm 3 in SRS treated group,which were lower than that in control group(566.7?135.0)mm 3 (P=0.031).The rCBV in endostatin group was 1.57?0.12,1.30?0.12,and 1.24?0.08,respectively according to three different doses,which were lower than those before endostatin therapy with statistical significance (P

Objective To investigate the conventional MRI and perfusion weighted imaging (PWI) features of central neurocytoma(CNC), and to evaluate the potentiality of them in diagnosing accuracy. Methods Three patients with CNC proved pathologically were collected, 4 patients with ependymoma were as control group, with conventional MRI and perfusion weighted imaging were performed in all of them. MRI features were observed, and relative regional cerebral blood volume (rrCBV) were calculated.Results CNCs were isosignal on T_1WI, hyperintense on T_2WI, minimal enhancment. Ependymomas were hypointense or isosignal on T_1WI, slightly hyperintense or hyperintense on T_2WI and minimal enhancement. On PWI, CNCs were obviously high-perfusion, rrCBV was 11.2, but which was 2.1 in ependymoma, there was statistically signifcant difference between two groups(P

Objective To investigate the value of MR perfusion weighted imaging(PWI) features in typing meningioma preoperation.Methods MR perfusion weighted imaging was performed on 39 patients with pathologically proved meningioma.The relative regionalcerebral blood volume(rrCBV) and relative mean transit time(rMTT) were calculated.Results The rrCBV and rMTT of angioblastic meningiomas were 11.8 and 1.8,which were higher than that of the others subtype.The rrCBV of meningothelial meningiomas andtransitional meningiomas were 8.3,7.5 respectively,the rMTT of them were 1.5 and 1.3,there was statistically significant difference in rMTT between two groups,but no difference in rrCBV.The rrCBV of fibrous meningiomas was 4.0,which was lower than that of the others.Conclusion PWI is very useful in typing meninigioma preoperation.

Protein-protein interactions (PPIs) are not only crucial for the assembly of protein complexes but also fundamental for maintaining normal biological functions. These interactions are vital for protein structure and biological functionality and play a central role in cellular signaling, metabolic pathways, and regulatory networks. The 14-3-3 protein, highly conserved and widely expressed in eukaryotes, primarily recognizes and binds to its partner proteins to participate in essential life processes such as cell cycle control, signal transduction, and energy metabolism. This review discusses the role of dysregulated PPIs between 14-3-3 proteins and their partner proteins such as estrogen receptor α (estrogen receptor α, ERα), RAF proto-oncogene serine/threonine-protein kinase (C-RAF/RAF-1), and p53 in the onset and progression of tumors, focusing on the research progress of 14-3-3/ERα, 14-3-3/C-RAF, and 14-3-3/p53 molecular glues. These molecular glues, by mimicking or enhancing the phosphorylation sites of serine on partner proteins, form covalent bonds, salt bridges, and hydrogen bonds with 14-3-3 proteins, thereby enhancing the stability of PPIs and effectively intervening in protein activity and signaling under pathological conditions. Additionally, this article explores the potential of this chemical intervention strategy in clinically suppressing tumor progression, providing a theoretical foundation and practical guidance for future research directions.