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911.
Nerve-cancer interactions modulate pancreatic cancer growth through direct effects on cancer cells and the microenviron-ment.New evidence now shows that nerves ... 相似文献
912.
913.
Kang Wang Shuling You Hesheng Hu Xiaolu Li Jie Yin Yugen Shi Lei Qi Pingjiang Li Yuepeng Zhao Suhua Yan 《Journal of cellular and molecular medicine》2022,26(10):2959
Sympathetic activation after myocardial infarction (MI) leads to ventricular arrhythmias (VAs), which can result in sudden cardiac death (SCD). The toll‐like receptor 4 (TLR4)/myeloid differentiation primary response 88 (MyD88)/nuclear factor‐kappa B (NF‐kB) axis within the hypothalamic paraventricular nucleus (PVN), a cardiac‐neural sympathetic nerve centre, plays an important role in causing VAs. An MI rat model and a PVN‐TLR4 knockdown model were constructed. The levels of protein were detected by Western blotting and immunofluorescence, and localizations were visualized by multiple immunofluorescence staining. Central and peripheral sympathetic activation was visualized by immunohistochemistry for c‐fos protein, renal sympathetic nerve activity (RSNA) measurement, heart rate variability (HRV) analysis and norepinephrine (NE) level detection in serum and myocardial tissue measured by ELISA. The arrhythmia scores were measured by programmed electrical stimulation (PES), and cardiac function was detected by the pressure–volume loop (P‐V loop). The levels of TLR4 and MyD88 and the nuclear translocation of NF‐kB within the PVN were increased after MI, while sympathetic activation and arrhythmia scores were increased and cardiac function was decreased. However, inhibition of TLR4 significantly reversed these conditions. PVN‐mediated sympathetic activation via the TLR4/MyD88/NF‐kB axis ultimately leads to the development of VAs after MI. 相似文献
914.
Soomin Lee Zheng Li Dehua Meng Qinming Fei Libo Jiang Tengfei Fu Ze Wang Shuhao Liu Jian Zhang 《Acta biochimica et biophysica Sinica》2021,(11):1516-1526
Vascularization is an important early indicator of osteogenesis involving biomaterials.Bone repair and new bone formation are associated with extensive neovascu... 相似文献
915.
Mengchao Yu Jie Lun Hongwei Zhang Lei Wang Gang Zhang Haisheng Zhang Jing Fang 《Acta biochimica et biophysica Sinica》2021,(11):1417-1427
Cancer cells are often exposed to cell intrinsic stresses and environmental perturbations that may lead to accumulation of unfolded and/or misfolded proteins in... 相似文献
916.
Thirty-seven wild plants as food for Asian elephants in the field in Simao, Yunnan province, China and five cultivated plants
as food for captive elephants in the Beijing Zoo were collected and analyzed for their main nutrient components. Protein,
fat, fiber, dry material, ash as well as major microelements: calcium, kalium, zincum, sodium in the food were analyzed by
standard methodology. No significant differences were found between the wild plants taken in the field and forage provided
in captivity. However, the calcium content in the forage is significantly less than the average of those in the wild plants.
It is suggested that the increase in calcium intake may contribute to the relief of low plasma calcium diseases of elephants
in captivity.
Translated from Journal of Beijing Normal University (Natural Science), 2006, 42(2): 184–188 [译自: 北京师范大学学报 (自然科学版)] 相似文献
917.
In this report, we used genistein that was extracted from a Chinese herbal medicine Huaijiao (Sophora japonica – Leguminosae) to evulate its pharmacological function on anti-osteoporosis. This genistein is purified in a large-scale production from Huaijiao by a state-of-art method as described by Tian et al. [2004. The preparation of genistein and LC-MS/MS on-line analysis. Drug Devel. Res. 61, 6–12]. Chemical structure of the isolated genistein was examined by using various techniques including nuclear magnetic resonant spectrum, infrared absorption spectrum, ultraviolet absorption spectrum and mass spectrum, and was proved to be identical to those purified from soybean in a small scale as previously reported. We randomly divided female SD rats into 6 groups, including control, ovariectomized model, Nilestriol-treated, and three level of dosages of genistein-treated. We evaluated the pharmacological effects of genistein against osteoporosis by measuring the bone density of femur and bone mineral group including calcium, phosphorous, and magnesium. The consequences of genistein treatment on bone histology and morphology were also determined by measuring the trabcular area, thickness and number. Our results indicated that treatment with a 4.5 or 9 mg/kg dosage of genistein could also prevent osteoporosis significantly at the 4th week after treatment. In comparison with the anti-osteoporosis effects of soybean genistein, the genistein extracted from Huaijiao has the same beneficial effect on anti-osteoporosis. 相似文献
918.
The chitosan with three-dimensional porous structure greatly increased the effective electrode surface for loading of platinum
nanoparticles and promoted efficient electron transfer. The resulting biosensor had a response time (within 5 s) and a linear
response from 6 μM to 4.2 mM glucose with a detection limit of 2 μM (S/N = 3). Moreover, the methodology can be applied for
the immobilization of other enzymes. 相似文献
919.
920.