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1.
Chinese Journal of Radiation Oncology ; (6): 643-648, 2022.
Article in Chinese | WPRIM | ID: wpr-956890

ABSTRACT

Objective:To analyze the association between the expression of ubiquinone oxidoreductase complex assembly factor 4 (NDUFAF4) and clinical prognosis of patients with hepatocellular carcinoma (HCC), evaluate the effect of NDUFAF4 on the radiosensitivity of human HCC cell lines, and unravel the underlying mechanism.Methods:The online database and HCC tissue samples were used to investigate the expression of NDUFAF4, and the correlation between NDUFAF4 expression level and clinical prognosis. The si-NDUFAF4 plasmid which down-regulated the expression level of NDUFAF4 was transferred into HepG2 and Huh7 cells. The radiosensitivity of HCC cell lines was detected by clone formation experiment. Nude mice were prepared for tumor-bearing experiment. The β-catenin level was detected by immunofluorescent staining. The expression levels of E-cadherin and N-cadherin proteins were determined by Western blot.Results:Bioinformatics results confirmed that NDUFAF4 was significantly up-regulated in HCC tissues, and the higher the expression level, the worse the patients' clinical prognosis ( P<0.05). The expression level of NDUFAF4 in HCC tissues was significantly higher than that in the adjacent tissues. Clone formation experiment confirmed that knockdown of NDUFAF4 significantly decreased the survival rate of HCC cells ( P<0.01). In vivo experiment showed that knockdown of NDUFAF4 could prevent the proliferation of HCC cells and down-regualte the expression levels of β-catenin and Ki-67. Knockdown of NDUFAF4 significantly down-regulated the expression level of β-catenin protein in the nucleus of HCC cell lines, suggesting that NDUFAF4 could activate the WNT/β-catenin signaling pathway. Knockdown of NDUFAF4 significantly up-regulated the expression level of E-cadherin and down-regulated that of N-cadherin. Conclusions:Knockdown of NDUFAF4 can significantly enhance the radiosensitivity of HCC cell lines by inhibiting the WNT/β-catenin signaling pathway. The expression level of NDUFAF4 is intimately correlated with clinical prognosis. NDUFAF4 can be considered as a new target for lowering the radiation resistance of HCC.

2.
Acta Physiologica Sinica ; (6): 461-468, 2022.
Article in Chinese | WPRIM | ID: wpr-939580

ABSTRACT

Histone methylation is one of the key post-translational modifications that plays a critical role in various heart diseases, including diabetic cardiomyopathy. A great deal of evidence has shown that histone methylation is closely related to hyperglycemia, insulin resistance, lipid and advanced glycation end products deposition, inflammatory and oxidative stress, endoplasmic reticulum stress and cell apoptosis, and these pathological factors play an important role in the pathogenesis of diabetic cardiomyopathy. In order to provide a novel theoretical basis and potential targets for the treatment of diabetic cardiomyopathy from the perspective of epigenetics, this review discussed and elucidated the association between histone methylation and the pathogenesis of diabetic cardiomyopathy in details.


Subject(s)
Humans , Diabetes Mellitus , Diabetic Cardiomyopathies/pathology , Histones , Methylation , Oxidative Stress , Protein Processing, Post-Translational
3.
Chinese Journal of Pediatrics ; (12): 215-220, 2022.
Article in Chinese | WPRIM | ID: wpr-935673

ABSTRACT

Objective: To understand the current situation regarding pediatric off-label use of drugs recommendations in Chinese clinical practice guidelines and to make recommendations for standardized reporting format regarding off-label use of drugs for children. Methods: This cross-sectional study was carried out by systematically searching the databases for Chinese guideline consensus articles published in journals between 2018 and 2020 and extracting recommendations regarding off-label use of drugs from those articles. The essential characteristics of the included guidelines, the ranking of off-label drug types, the order of drug information, the type of off-label drug use, and the percentage of citation studies on which the recommendations were based were analyzed. Results: Among 108 studies that included Chinese off-label guidelines and consensus, 364 recommendations on pediatric off-label use of drugs were included. The Chinese Medical Association published the most, 48 out of the 108 studies (44.4%), and of those 14 studies (13.0%) were on infectious and parasitic diseases. Of the 364 recommendations on off-label use of drugs, the most commonly addressed drugs were 16 recommendations (4.4%) for cyclosporine A, 11 recommendations (3.0%) for methotrexate , and 11 recommendations (3.0%) for fentanyl. The most commonly addressed drug categories were as follows: 68 recommendations (18.6%) were immune system drugs, 66 recommendations (18.1%) were anti-infectives, and 56 recommendations (15.4%) were oncology drugs. The most commonly addressed drug information accounts were as follows: 364 recommendations (100.0%) were indications, 204 recommendations (56.0%) were dosages, and 198 recommendations (54.4%) were the route of administration. Based on the instructions approved by the Chinese Food and Drug Administration, the main forms of the off-label drug were as follows: 175 recommendations (48.1%) were unapproved indications, 127 recommendations (34.9%) were unapproved populations, and 72 recommendations (19.8%) were unapproved ages. Only 129 recommendations (35.4%) were cited, mainly including clinical guidelines (48 studies, 23.4%), reviews (22 studies, 10.7%), and pediatric randomized controlled trials (22 studies, 10.7%). Conclusions: Off-label use of drugs is commonly recommended in pediatric guidelines and consensus documents written by Chinese authors. However, the reporting of the recommendations varies widely, and the quality of the supporting evidence is poor.


Subject(s)
Child , Humans , China , Consensus , Cross-Sectional Studies , Off-Label Use , Pharmaceutical Preparations
4.
International Journal of Traditional Chinese Medicine ; (6): 1408-1414, 2022.
Article in Chinese | WPRIM | ID: wpr-954472

ABSTRACT

Objective:To establish a method of measuring the contents of gallic acid, brevifolin, corilagin, geraniin, ellagic acid and rutin in Phyllanthus urinaria L. simultaneously with fingerprint study for analysis. Methods:Phyllanthus urinaria L. was extracted by ultrasound with 50% methanol. Chromatographic separation was performed on a Phenonmenex Luna C18 (4.6 mm×250 mm, 5 μm). The mobile phase consisted of acetonitrile (A) and 0.1% phosphoric acid aqueous solution (B) with gradient elution. The flow rate was 1.0 ml/min. The column temperature was 25 ℃, and the injection volume was 10 μl. The detection wavelength was 270 nm. HPLC fingerprints of Phyllanthus urinaria L. from different habitats was established. PCA and OPLS-DA were used to analyze the differences in chemical components of different habitats. Results:Gallic acid, brevifolin, corilagin, geraniin, ellagic acid and rutin showed good linearity at 0.042 8-0.641 6, 0.033 4-0.501 4, 0.142 2-2.133 1, 0.383 1-5.746 5, 0.063 1-0.946 2 and 0.019 2-0.287 8 μg, respectively. The average recovery rate of them was 103.65%, 96.39%, 101.85%, 95.04%, 98.79% and 98.33%, respectively. The HPLC fingerprints of different habitats contained 14 characteristic common peaks, and six compounds characteristic peaks were identified. PCA analysis showed that the chemical components of Phyllanthus urinaria L. from different habitats were different. Geraniin, ellagic acid and corilagin were screened by OPLS-DA. Conclusions:The method is efficient, accurate and sensitive, which can be used to measure the six components in Phyllanthus urinaria L.. The established HPLC fingerprint of different habitats combined with the measrurement method of six components can be used for the quality control and evaluation of Phyllanthus urinaria L..

5.
International Eye Science ; (12): 1200-1204, 2021.
Article in Chinese | WPRIM | ID: wpr-877383

ABSTRACT

@#Age-related macular degeneration(ARMD)is a major cause of irreversible loss of central vision in the elderly. Typical characteristics of ARMD consist of retinal pigment epithelium(RPE), degenerative changes of choroidal capillaries and vitreous warts in macular area. Clinical ARMD is divided into two subtypes: non effusive(dry or atrophic)and effusive(wet or neovascular). The occurrence of the disease is the result of the interaction of many factors, such as age, environment, heredity, smoking, oxidative stress and cardiovascular dysfunction, <i>etc</i>. In view of the important role of RPE cells in pathogenesis of ARMD, the effects and possible mechanisms of blue light, smoking, oxidative stress, lipofuscin accumulation, chronic inflammation and protein homeostasis on the onset of dry ARMD are summarized by focusing on RPE cells. This will provide new ideas to help understand and prevent the occurrence of dry ARMD.

6.
Journal of Breast Cancer ; : 141-161, 2020.
Article | WPRIM | ID: wpr-835606

ABSTRACT

Purpose@#Numerous studies have shown that the frequency of myeloid-derived suppressor cells (MDSCs) is associated with tumor progression, metastasis, and recurrence. Chemokine (C-C motif) ligand 3 (CCL3) may be secreted by tumor cells and attract MDSCs into the tumor microenvironment. In the present study, we aimed to explore the molecular mechanisms whereby CCL3 is involved in the interaction of breast cancer cells and MDSCs. @*Methods@#The expression of CCL3 and its receptors was investigated using real-time polymerase chain reaction, western blotting, and enzyme-linked immunosorbent assay. The cell counting Kit-8, wound healing, and transwell assays were performed to study cell growth, migration, and invasion. Cell cycling, apoptosis, and the frequency of MDSCs were investigated through flow cytometry. Transwell assays were used for co-culture and chemotaxis detection. Markers of the epithelial-mesenchymal transition (EMT) were determined with western blotting. The role of CCL3 in vivo was studied via tumor xenograft experiments. @*Results@#CCL3 promoted cell proliferation, migration, invasion, and cycling, and inhibited apoptosis of breast cancer cells in vitro. Blocking CCL3 in vivo inhibited tumor growth and metastases. The frequency of MDSCs in patients with breast cancer was higher than that in healthy donors. Additionally, MDSCs might be recruited by CCL3. Co-culture with MDSCs activated the phosphoinositide 3-kinase-protein kinase B-mammalian target of rapamycin (PI3K-Akt-mTOR) pathway and promoted the EMT in breast cancer cells, and their proliferation, migration, and invasion significantly increased. These changes were not observed when breast cancer cells with CCL3 knockdown were co-cultured with MDSCs. @*Conclusion@#CCL3 promoted the growth of breast cancer cells, and MDSCs recruited by CCL3 interacted with these cells and then activated the PI3K-Akt-mTOR pathway, which led to EMT and promoted the migration and invasion of the cells.

7.
Chinese Journal of General Practitioners ; (6): 161-163, 2020.
Article in Chinese | WPRIM | ID: wpr-799329

ABSTRACT

The ability of prevention, treatment and management of infectious diseases is a basic requirement for general practitioners. This article introduces our experience in the infectious disease rotation for general practice residency training, focusing on the rotation management at different stages of training to explore how to improve teaching quality and the ability of trainers in a short period of the rotation.

8.
Chinese Journal of General Practitioners ; (6): 161-163, 2020.
Article in Chinese | WPRIM | ID: wpr-870636

ABSTRACT

The ability of prevention, treatment and management of infectious diseases is a basic requirement for general practitioners. This article introduces our experience in the infectious disease rotation for general practice residency training, focusing on the rotation management at different stages of training to explore how to improve teaching quality and the ability of trainers in a short period of the rotation.

9.
Yonsei Medical Journal ; : 832-841, 2019.
Article in English | WPRIM | ID: wpr-762123

ABSTRACT

PURPOSE: Epirubicin is one of the most effective drugs against osteosarcoma. miR-1301 is involved in the occurrence and development of osteosarcoma. Whether miR-1301 is responsible for the chemosensitivity of osteosarcoma cells to epirubicin remains largely unknown. MATERIALS AND METHODS: U2OS and SAOS-2 cells were treated with various concentrations of epirubicin. Flow cytometry was employed to evaluate cell apoptotic rate. Cell proliferation was measured by Cell Counting Kit-8 assay. Western blot and quantitative real-time polymerase chain reaction were utilized to detect the expressions of B-cell lymphoma-2 (Bcl-2), Bcl-2 assaciated X protein (Bax), cleaved-caspase-3, cleaved-poly (ADP-ribose) polymerases (PARP1), TP53-regulated inhibitor of apoptosis 1 (TRIAP1), and microRNA-1301 (miR-1301). The relationship between miR-1301 and TRIAP1 was determined by luciferase reporter assay. RESULTS: Epirubicin inhibited proliferation in a dose-dependent manner, induced apoptosis, decreased the expression of Bcl-2, and increased the expressions of Bax, cleaved-caspase-3, and cleaved-PARP1 in osteosarcoma cells. miR-1301 was downregulated in U2OS and SAOS-2 cells. Importantly, epirubicin significantly increased the levels of miR-1301. Overexpression of miR-1301 suppressed proliferation and promoted apoptosis. Interestingly, those effects were enhanced by epirubicin. In contrast, miR-1301 depletion attenuated the epirubicin-mediated anti-osteosarcoma effect. miR-1301 negatively regulated the expression of TRIAP1 in U2OS and SAOS-2 cells. Furthermore, epirubicin inhibited the mRNA and protein levels of TRIAP1 by upregulating miR-1301 levels. Epirubicin suppressed cell proliferation by downregulating TRIAP1. CONCLUSION: miR-1301 was implicated in the chemosensitivity of osteosarcoma to epirubicin by modulating TRIAP1.


Subject(s)
Apoptosis , B-Lymphocytes , Blotting, Western , Cell Count , Cell Proliferation , Epirubicin , Flow Cytometry , Luciferases , Osteosarcoma , Real-Time Polymerase Chain Reaction , RNA, Messenger
10.
Chinese Journal of Schistosomiasis Control ; (6): 565-566, 2019.
Article in Chinese | WPRIM | ID: wpr-818997

ABSTRACT

Rhabditis axei is a free-living nematode, which can occasionally invade into humans through drinking and contacting wastewater. It is usually parasitic in the digestive and urinary systems, causing the disease of rhabditelliasis axei. This paper reports a case of R. axei infection found in the urine routine examination.

11.
Chinese Journal of Schistosomiasis Control ; (6): 565-566, 2019.
Article in Chinese | WPRIM | ID: wpr-818545

ABSTRACT

Rhabditis axei is a free-living nematode, which can occasionally invade into humans through drinking and contacting wastewater. It is usually parasitic in the digestive and urinary systems, causing the disease of rhabditelliasis axei. This paper reports a case of R. axei infection found in the urine routine examination.

12.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 56-60, 2018.
Article in Chinese | WPRIM | ID: wpr-707090

ABSTRACT

Objective To investigate the effects of cornel iridoid glycoside (CIG) on the learning-memory ability and pathological changes in the brain of vascular dementia (VD) rats; To discuss relevant mechanism of action. Methods SD rats were randomly divided into sham-operation group, model group, positive medicine group, CIG groups low-, medium- and high-dose groups. The animal model of VD was replicated by permanent bilateral common carotid artery occlusion (2VO) in rats. Drugs were intragastrically administered 6 h after surgery and then once a day for 3 months. Morris water maze test was used to detect spatial learning-memory ability, and recognition memory was measured by the object recognition test. Immunohistochemical staining was used to detect the neuronal survival and the expression of choline acetyltransferase (ChAT) in the brain. Results Three months after permanent 2VO operation, the model rats showed a longer escape latency in Morris water maze, a lower discrimination index in the object recognition test, and a decrease in NeuN positive neuronal survival and ChAT expression in the hippocampus and cerebral cortex. Compared with the model group, intragastric administration of CIG for 3 months shortened the escape latency in Morris water maze, elevated the discrimination index in the object recognition test, and increased the NeuN positive neuronal survival in the hippocampus and cerebral cortex and ChAT expression of 2VO rats. Conclusion CIG can improve the cognitive impairment of VD model rats through protecting neurons and promoting ChAT expression.

13.
Chinese Journal of Rehabilitation Theory and Practice ; (12): 309-312, 2018.
Article in Chinese | WPRIM | ID: wpr-702489

ABSTRACT

@#Rats after permanent bilateral common carotid artery ligation would result in cerebral blood flow reduction,learning and memory dysfunction,neuronal injury and death,synaptic and dendritic injury,and neuroinflammation,etc.,which repro-duce the pathology and clinical symptoms of human vascular dementia,that help for further research on pathophysiolo-gy and treatment of vascular dementia.

14.
Chinese Medical Journal ; (24): 2269-2274, 2016.
Article in English | WPRIM | ID: wpr-307424

ABSTRACT

<p><b>BACKGROUND</b>Platelet function tests are widely used in clinical practice to guide personalized antiplatelet therapy. In China, the thromboelastography (TEG) test has been well accepted in clinics, whereas VerifyNow, mainly used for scientific research, has not been used in routine clinical practice. The aim of the current study was to compare these two point-of-care platelet function tests and to analyze the consistency between the two tests for evaluating on-clopidogrel platelet reactivity in Chinese acute myocardial infarction patients undergoing percutaneous coronary intervention (PCI).</p><p><b>METHODS</b>A total of 184 patients admitted to Fuwai Hospital between August 2014 and May 2015 were enrolled in the study. On-clopidogrel platelet reactivity was assessed 3 days after PCI by TEG and VerifyNow using adenosine diphosphate as an agonist. Based on the previous reports, an inhibition of platelet aggregation (IPA) <30% for TEG or a P2Y12 reaction unit (PRU) >230 for VerifyNow was defined as high on-clopidogrel platelet reactivity (HPR). An IPA >70% or a PRU <178 was defined as low on-clopidogrel platelet reactivity (LPR). Correlation and agreement between the two methods were analyzed using the Spearman correlation coefficient (r) and kappa value (κ), respectively.</p><p><b>RESULTS</b>Our results showed that VerifyNow and TEG had a moderate but significant correlation in evaluating platelet reactivity (r = -0.511). A significant although poor agreement (κ = 0.225) in identifying HPR and a significantly moderate agreement in identifying LPR (κ = 0.412) were observed between TEG and VerifyNow. By using TEG as the reference for comparison, the cutoff values of VerifyNow for the Chinese patients in this study were identified as PRU >205 for HPR and PRU <169 for LPR.</p><p><b>CONCLUSIONS</b>By comparing VerifyNow to TEG which has been widely used in clinics, VerifyNow could be an attractive alternative to TEG for monitoring on-clopidogrel platelet reactivity in Chinese patients.</p>


Subject(s)
Aged , Female , Humans , Male , Middle Aged , Adenosine Diphosphate , Therapeutic Uses , Aspirin , Therapeutic Uses , Blood Platelets , China , Myocardial Infarction , Drug Therapy , General Surgery , Percutaneous Coronary Intervention , Methods , Platelet Aggregation , Platelet Aggregation Inhibitors , Therapeutic Uses , Point-of-Care Systems , Receptors, Purinergic P2Y12 , Metabolism , Thrombelastography , Ticlopidine , Therapeutic Uses
15.
Journal of Experimental Hematology ; (6): 756-760, 2015.
Article in Chinese | WPRIM | ID: wpr-357276

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the complete blood count, morphological changes, follicular T helper (Tfh) cells and expression of PD-1 in bone marrow and spleen of mice with myelodysplastic syndrome(MDS) and to explore their significance in pathogenesis of MDS.</p><p><b>METHODS</b>The 10 male NUP98-HOXD13 transgenic mice and 10 male homologous wild-type C57BL/6J mice were used for experments. The complete blood count, morphological change of NUP98-HOXD13 transgenic mice and wild-type C57BL/6J were detected by routine methods. The level of Tfh cells and expression of PD-1 in bone marrow and spleen were measured by flow cytometry. The PD-1 mRNA of bone marrow mononuclear cells and spleen cells were analyzed by real-time PCR method.</p><p><b>RESULTS</b>The counts of RBC, neutrophile and platelet in above- mentioned transgenic mice were less than that in wild type C57BL/6J mice. As compared with wild type C57BL/6J mice, the morphology of RBC and platelet in transgenic mice was some abnormal, including bi-nucleated erythrocytes, ringed mucleated neutrophil and erythroblastic islands. The count of Tfh cells in transgenic mice was less than that in wild type mice, but the expression of PD-1 was higher. The expression of BMMNC PD-1 mRNA was obviously higher than that in wild type mice.</p><p><b>CONCLUSION</b>The pancytopenia and dysplasia, decrease of Tfh cells and increase of PD-1 expression have been observed in NUP98-HOXD13 transgenic mice, which may be one of important reasons for promoting malignant clone and leading to impair anti immune respones.</p>


Subject(s)
Animals , Male , Mice , Bone Marrow , Bone Marrow Cells , Cells, Cultured , Flow Cytometry , Mice, Inbred C57BL , Mice, Transgenic , Myelodysplastic Syndromes , Pancytopenia , Programmed Cell Death 1 Receptor , Real-Time Polymerase Chain Reaction , T-Lymphocytes, Helper-Inducer
16.
China Pharmacy ; (12): 5105-5107, 2015.
Article in Chinese | WPRIM | ID: wpr-501278

ABSTRACT

OBJECTIVE:To compare pharmacoeconomic and effect of Xueshuantong for injection and Ginkgo leaf extract and dipyridamole injection in the treatment of ischemic stroke. METHODS:Retrospective study was conducted. Totally 404 inpatients with ischemic stroke were divided into Xueshuantong group(271 cases)and ginkgo leaf extract and dipyridamole group(133 cas-es) according to clinical treatment programs. Based on the conventional treatment,patients in 2 groups were given Xueshuantong for injection and ginkgo leaf extract and dipyridamole injection,respectively. The average treatment course was 10 d. Cost-minimi-zation analysis was performed with the determination index of total effective rate. RESULTS:The total effective rates in Xueshuan-tong group and ginkgo leaf extract and dipyridamole group were 90.77% and 88.72%,respectively,the difference was not statisti-cally significant(P>0.05). The costs in 2 groups were 12 860.21 yuan and 13 155.40 yuan,respectively,and xueshuantong group had lower than ginkgo leaf extract and dipyridamde group. CONCLUSIONS:Both Xueshuantong for injection and Ginkgo leaf ex-tract and dipyridamole injection are effective in the treatment of ischemic stroke. However,the economy of Xueshuantong for injec-tion is superior to the other one.

17.
Chinese Journal of Information on Traditional Chinese Medicine ; (12): 46-49, 2015.
Article in Chinese | WPRIM | ID: wpr-464400

ABSTRACT

Objective To review the occurrence and relevant factors of adverse drug reactions (ADR) of Xueshuantong Injection. Methods Articles and documents in CNKI, VIP, and CBM were searched in June 2014 according to incorporation and exclusion standard. The dose, indication, medicating path and method, solvent, as well as the duration of treatment course and adverse reaction of Xueshuantong Injection were analyzed. The national information system for monitoring ADR was searched to collect adverse reaction cases of Xueshuantong Injection (2004.9-2014.9) reported in Lanzhou region. Cases were analyzed and under analogy with literature results. Results Totally 66 articles involving 4686 patients were included (except for patients of control group). Adverse reactions occurred in 767 patients, including skin damage (402 cases), systemic damage (221 cases), gastrointestinal system damage (75 cases). All of these were relieved after treatment. There were 11 adverse reaction cases of Xueshuantong Injection from Lanzhou region reported in the national information system for monitoring ADR. Conclusion There is a high incidence of adverse reactions in the clinical application of Xueshuantong Injection and ratio of serious adverse events report.

18.
Journal of Experimental Hematology ; (6): 421-424, 2014.
Article in Chinese | WPRIM | ID: wpr-349697

ABSTRACT

The aim of this study was to investigate the effects of D-methionine (D-met) on the hematopoietic system injury in irradiated mice. C57BL/6 mice were divided into control group, irradiated group, 300 mg/kg D-met plus irradiation group and 1000 mg/kg D-met plus irradiation group. The control mice received sham irradiation, and the mice in remainder groups were exposed to 7.5 Gy; 1,4,8 Gy and 1 Gy of (137)Cs γ-ray respectively, were used to detect the survival rate, survival rate of bone marrow cells, WBC and its differential counts as well the colony formation ability in irradiated mice, respectively. The D-met was intraperitoneally injected to mice at 30 min before irradiation. The results showed that 300 and 1000 mg/kd D-met did not obviously enhance the survival rate of mice exposed to 7.5 Gy; the 10(-2),10(-3),10(-4) mol/L D-met significantly increased the survival rate of bone marrow cells in mice exposed to 1,4,8 Gy; 300 and 1000 mg/kg D-met even so increased the WBC count of peripheral blood in mice exposed to 1 Gy, but there was no statistical difference as compared with irradiated alone mice, moreover 300 and 1000 mg/kg D-met could obviously promote the colony formation ability of bone marrow cells in irradiated mice, the CFU-GM count was higher than that in 1 Gy irradiated mice (P < 0.05). It is concluded that the D-met can effectively mitigate the marrow cell injury resulted from irradiation, enhance the survival rate of bone marrow cells in irradiated mice, promote the recovery of hematopoietic function from radiation injury in mice.


Subject(s)
Animals , Mice , Bone Marrow Cells , Radiation Effects , Hematopoietic System , Radiation Effects , Leukocyte Count , Methionine , Pharmacology , Mice, Inbred C57BL , Radiation Injuries
19.
Acta Academiae Medicinae Sinicae ; (6): 538-541, 2014.
Article in Chinese | WPRIM | ID: wpr-329789

ABSTRACT

Dipeptidyl peptidase-4 (DPP-4) is a protease that cleaves the peptides with alanine, praline, or other selective amino acids at the N-terminal penultimate position. The substrates of DPP-4 include many chemokines, colony-stimulating factors, and interleukins. Recent research has shown that DPP-4 can affect the hematopoietic stem and progenitor cells and transplantation by truncating the granulocyte colony stimulating factor. However, its regulatory effect on DPP-4 and most peptides truncation are still unknown. This review summarizes the recent advances in the DPP-4 research.


Subject(s)
Humans , Dipeptidyl Peptidase 4 , Physiology , Hematopoiesis , Hematopoietic Stem Cell Transplantation
20.
Chinese Medical Journal ; (24): 1469-1479, 2013.
Article in English | WPRIM | ID: wpr-350486

ABSTRACT

<p><b>BACKGROUND</b>Our previous studies have demonstrated that Tongxinluo (TXL), a traditional Chinese medicine, can protect hearts against no-reflow and reperfusion injury in a protein kinase A (PKA)-dependent manner. The present study was to investigate whether the PKA-mediated cardioprotection of TXL against no-reflow and reperfusion injury relates to the inhibition of myocardial inflammation, edema, and apoptosis.</p><p><b>METHODS</b>In a 90-minute ischemia and 3-hour reperfusion model, minipigs were randomly assigned to sham, control, TXL (0.05 g/kg, gavaged one hour prior to ischemia), and TXL + H-89 (a PKA inhibitor, intravenously and continuously infused at 1.0 µg/kg per minute) groups. Myocardial no-reflow, necrosis, edema, and apoptosis were determined by pathological and histological studies. Myocardial activity of PKA and myeloperoxidase was measured by colorimetric method. The expression of PKA, phosphorylated cAMP response element-binding protein (p-CREB) (Ser(133)), tumor necrosis factor α (TNF-α), P-selectin, apoptotic proteins, and aquaporins was detected by Western blotting analysis.</p><p><b>RESULTS</b>TXL decreased the no-reflow area by 37.4% and reduced the infarct size by 27.0% (P < 0.05). TXL pretreatment increased the PKA activity and the expression of Ser(133) p-CREB in the reflow and no-reflow myocardium (P < 0.05). TXL inhibited the ischemia-reperfusion-induced elevation of myeloperoxidase activities and the expression of TNF-α and P-selectin, reduced myocardial edema in the left ventricle and the reflow and no-reflow areas and the expression of aquaporin-4, -8, and -9, and decreased myocytes apoptosis by regulation of apoptotic protein expression in the reflow and no-reflow myocardium. However, addition of the PKA inhibitor H-89 counteracted these beneficial effects of TXL.</p><p><b>CONCLUSION</b>PKA-mediated cardioprotection of TXL against no-reflow and reperfusion injury relates to the inhibition of myocardial inflammation, edema, and apoptosis in the reflow and no-reflow myocardium.</p>


Subject(s)
Animals , Apoptosis , Aquaporin 4 , Physiology , Cyclic AMP Response Element-Binding Protein , Physiology , Cyclic AMP-Dependent Protein Kinases , Physiology , Drugs, Chinese Herbal , Pharmacology , Edema , Hemodynamics , Myocardial Reperfusion Injury , Myocarditis , Swine , Swine, Miniature
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