A facile and effective tandem reaction of ynones and methyl salicylates was developed to obtain a broad range of 3-acyl chromones in moderate-to-excellent yields. This protocol underwent a Michael addition and cyclization process, which exhibited easily accessible substrates, broad substrate scope, and high regioselectivity under mild and transition-metal-free conditions. Moreover, gram-scale reaction and further chemical transformation of the products were also further studied.
View Article and Find Full Text PDFObjective: infection is mostly a family-based infectious disease. To facilitate its prevention and management, a national consensus meeting was held to review current evidence and propose strategies for population-wide and family-based infection control and management to reduce the related disease burden.
Methods: Fifty-seven experts from 41 major universities and institutions in 20 provinces/regions of mainland China were invited to review evidence and modify statements using Delphi process and grading of recommendations assessment, development and evaluation system.
The mechanisms underlying the two-way relationship between diabetes mellitus (DM) and periodontitis are unclear. We examined a possible effect of galectin-3 (Gal-3), a factor in DM and bone metabolism, on periodontitis with or without DM. Using enzyme-linked immunosorbent assay, we detected saliva Gal-3 in patients with periodontitis, with or without type 2 diabetes mellitus (T2DM).
View Article and Find Full Text PDFIndian J Dermatol Venereol Leprol
March 2022
Background/aims: Primary angiosarcoma of the small intestine is a rare neoplasia, and there are limited data from systematic analyses. The aim of this study is to describe the clinical and pathological characteristics in addition to the prognostic factors for this rare neoplasia.
Methods: We retrospectively collected the clinical records and prognostic information of 66 patients with small intestine angiosarcoma reported between 1970 and 2017.
Biochem Biophys Res Commun
February 2016
Dysregulation of microRNA contributes to the high incidence and mortality of breast cancer. Here, we show that miR-625 was frequently down-regulated in breast cancer. Decrease of miR-625 was closely associated with estrogen receptor (P = 0.
View Article and Find Full Text PDFSufficient light is essential for the growth and physiological functions of photosynthetic organisms, but prolonged exposure to high light (HL) stress can cause cellular damage and ultimately result in the death of these organisms. Synechococcus sp. PCC 7002 (hereafter Synechococcus 7002) is a unicellular cyanobacterium with exceptional tolerance to HL intensities.
View Article and Find Full Text PDFInt J Clin Exp Pathol
July 2015
RKIP is proposed as a new metastasis suppressor. Our recent study showed that RKIP inhibits malignant phenotypes of gastric cancer cells. However, the underlying mechanism of RKIP function in gastric cancer is unclear.
View Article and Find Full Text PDFBackground: Serum pepsinogen (PG) levels are valuable in the diagnosis of gastric diseases. However, PG levels are affected by many factors such as the area and race. This study aimed to investigate serum PG levels in patients with different gastric diseases who were Chinese Han people in Hunan Province, midsouth China.
View Article and Find Full Text PDFNon-steroidal anti-inflammatory drugs, such as indomethacin (IN), inhibit colorectal cancer (CRC) growth through cyclooxygenase (COX)-independent mechanisms, however, the precise biological mechanisms are not completely understood. The aim of the present study was to investigate new molecular factors potentially associated with IN in HCT116 human CRC cells, which do not express COX, using a proteomic approach. The total proteins from the IN-treated and untreated groups were separated by immobilized pH gradient-based two-dimensional gel electrophoresis.
View Article and Find Full Text PDFObjective: To detect the changes of the antioxidant level, cell cycle progression, necrosis and apoptosis, calcium ion concentration ([Ca2+] i) and mitochondrial membrane potential (deltapsim) in the model rats of impaired glucose regulation (IGR) induced by long-range high-fat diet, and to explore IGR-induced male reproductive injury and its mechanisms.
Methods: Forty male Wistar rats were randomly divided into a normal control (n = 10) and an IGR model group (n = 30), and the IGR model was established by 20 weeks of long-range high-fat diet. Pathological changes in the rat spermatogenic cells were detected by HE staining; the content of malondialdehyde (MDA) and activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) were measured with biochemical methods; changes in the cell cycle progression, necrosis and apoptosis were determined using flow cytometry with propidium iodide (PI) dyeing and the Annexin V-FITC kit, respectively, and [Ca2+]i and deltapsim were detected by flow cytometry with Fluo-3 and Rhodamine probe labeling, respectively.
Background: Pim-1 kinase is involved in the control of cell growth, differentiation and apoptosis. Recent evidence suggests that Pim kinases play a role in immune regulation and inflammation. However, the role of Pim-1 kinase in inflammatory bowel diseases (IBD) remains unclear.
View Article and Find Full Text PDFThe aim of this study was to evaluate the therapeutic effects of osteopontin neutralization treatment on schistosome-induced liver injury in BALB/C mice. We randomly divided 100 BALB/C mice into groups A, B, C, D and group E. Mice in all groups except group A were abdominally infected with schistosomal cercariae to induce a schistosomal hepatopathological model.
View Article and Find Full Text PDFThe pathogenesis of systemic sclerosis (SSc) is still unclear. CD70, a B cell costimulatory molecule that interacts with CD27 during B-T cell contact, is overexpressed due to demethylation of its promoter regulatory elements in CD4+ T cells from patients with the following autoimmune diseases, namely systemic lupus erythematosus (SLE), subacute cutaneous lupus erythematosus (SCLE) and primary Sjögren's syndrome (pSS). However, as an autoimmune disease, it is unknown whether aberrant expression and methylation of CD70 occur in SSc CD4+ T cells.
View Article and Find Full Text PDFAim: To investigate osteopontin expression and its association with hepatopathologic changes in BALB/C mice infected with Schistosoma japonicum.
Methods: The schistosomal hepatopathologic mouse model was established by abdominal infection with schistosomal cercaria. Liver samples were obtained from mice sacrificed at 6, 8, 10, 14, and 18 wk after infection.
Zhejiang Da Xue Xue Bao Yi Xue Ban
May 2011
Objective: To evaluate the efficacy of bismuth-based quadruple therapy as the first-line treatment for H.pylori infection.
Methods: A total of 136 patients with H.
Sichuan Da Xue Xue Bao Yi Xue Ban
March 2011
Objective: To study the effect of Rutaecarpine on the treatment of atopic dermatitis in mice.
Methods: DNCB was repeatedly applied on the back of NC/Nga mice to establish the animal model of atopic dermatitis. The mice without and with treatments with various does of Rutaecarpine were compared.
Guang Pu Xue Yu Guang Pu Fen Xi
April 2010
The simultaneous determination of trace elements in ultrafine agaric was carried out by inductively coupled plasma atomic emission spectrometry (ICP-AES). The experiments were done using wet acid digestion sample preparation. The samples were dissolved at 120 degrees C constant temperature.
View Article and Find Full Text PDFAim: To investigate the relation of Fas and Fas ligand (FasL) protein expression with carcinogenesis and metastasis of gastric carcinoma.
Methods: Immunohistochemistry was used to detect Fas and FasL protein expression in 64 gastric carcinoma tissue samples and 20 normal gastric tissue samples. Relation between FasL and Fas expression, age and gender of gastric cancer patients, and pathological subtype and lymph node metastasis of gastric cancer was analyzed.
Zhonghua Nei Ke Za Zhi
February 2009
Objective: To evaluate the diagnostic valve of double balloon enteroscopy in patients with obscure abdominal pain and analyze the etiology of chronic abdominal pain resulted from enteral diseases.
Methods: Sixty-seven cases with chronic abdominal pain underwent a previous negative gastroscopy, colonoscopy, gastrointestinal barium, B ultrasound and electrocardiogram were received double balloon enteroscopy during June 2005 to June 2008.
Results: Thirty-six of 67 patients was done by enteroscopy via anus, and 19 cases via oral, and 12 cases via both anus and oral.
Zhong Nan Da Xue Xue Bao Yi Xue Ban
December 2008
Objective: To determine the effect of a selective COX-2 inhibitor celecoxib on cell proliferation and apoptosis of gastric cancer cell line BGC-823 to seek an effective and safe drug for gastric cancer chemoprevention.
Methods: Gastric cancer cell line BGC-823 was cultured to 80% fusion. MTT assay and flow cytometry were used to quantify the influence of celecoxib in the proliferation, cell period, and apoptosis of gastric cancer cell line BGC-823.
Acta Crystallogr Sect E Struct Rep Online
June 2009
The title mononuclear complex, [Zn(C(8)H(11)N(2)O(3)S)(2)], is a zinc salt of 2-(2-pyridylmethyl-amino)ethane-sulfonic acid (Hpmt). The Zn(II) ion is located on an inversion centre and is octahedrally surrounded by four N and two O atoms. The deprotonated pmt(-) anion coordinates in a facial arrangement through its two N atoms and one of the sulfonate O atoms.
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
February 2009
In the title compound, [CoCl(2)(C(10)H(8)N(2)S)(2)](n), the Co(II) atom is located on an inversion centre and is six-coordinated by four N atoms of four symmetry-related di-4-pyridyl sulfide ligands, and two Cl atoms in trans positions, in a distorted octa-hedral geometry. The bridging bidentate di-4-pyridyl sulfide ligands link the Co(II) centres into a three-dimensional network. The four coordinating pyridine groups are donors and acceptors (N atoms) for intra-molecular C-H⋯N and C-H⋯Cl hydrogen bonds.
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