Spontaneous hemangiosarcoma in the spleen and liver of a young rat     

Rina Yamane  Makoto Tanaka  Shinya Kaneda 《Journal of toxicologic pathology》2022,35(1):89

Spontaneous hemangiosarcoma in young rats is rare. In this report, we describe a case of a spontaneous hemangiosarcoma in the spleen and liver of young rats. At necropsy, multiple pale red masses were observed in the spleen. Histopathologically, solid growth and haphazardly arranged neoplastic cells were observed, although no characteristic growth pattern was observed. In contrast, irregularly sized small slit-shaped spaces containing erythrocytes were found among the neoplastic cells. Reticular fibers incompletely surrounding the neoplastic cells were observed by silver staining. Immunohistochemistry revealed that the neoplastic cells were positive for vWF and CD34. Electron microscopic examination revealed that the neoplastic cells had erythrocytes in the lumen and Weibel-Palade bodies in the cytoplasm and were arranged along a discontinuous basal lamina. These features indicate that the tumor originated from vascular endothelial cells. Based on these results, the tumor was diagnosed as a hemangiosarcoma in the spleen and liver.  相似文献   

Excess sulfate supply and onion‐induced human antiplatelet activity     

Kathryn S. Orvis  Irvin L. Goldman  Phillip Barak 《植物养料与土壤学杂志》2001,164(4):457-462

Awareness is growing of health‐promoting functional foods and the use of various plants as nutraceuticals. Due to a suite of organosulfur compounds, onion, and other vegetable Alliums possess a unique antiplatelet effect that may promote cardiovascular health because aggregating platelets can lead to heart attack and stroke. Investigation of the consequences of S nutrition in onion has primarily focused on levels of S ranging from deficiency to just above sufficiency; however, little work has been conducted to examine the effects of supraoptimal S nutrition on organosulfur‐based traits. Four onion selections were grown in hydroponic solutions with 2, 7, and 12 mM SO₄^2—‐S in greenhouse experiments during 1995—1996 and 1996—1997. Onion plants were separated into root, leaf, and bulb portions and analyzed for mineral content. Onion bulb extracts were assayed for in vitro human antiplatelet activity. Bulb and leaf S were not affected by increasing solution culture S, but root S was increased by 98 % when solution culture S was increased from 2 mM to 12 mM. Similar increases in root Ca and Al were detected, suggesting CaSO₄ and AlSO₄⁺ were accumulated in and on the root. No directional change in antiplatelet activity was detected as S was increased from 2 to 12 mM. This lack of significant change in antiplatelet activity with increasing S levels suggests that modification of this trait by simply increasing S levels may not be feasible in a solution culture environment.  相似文献   

江苏省常州市武进区昆虫多样性及区系特征分析     

王倩  钱宏革  苏日娜  白晓拴 《内蒙古林业调查设计》2022,45(1):52-57,85

2018年7月28日至8月22日,2019年4月18~24日在江苏省常州市武进区选取42条样线进行了昆虫调查。经统计,在科级、属级、种级水平上,半翅目昆虫的数目(21科52属57种)都是最多的,鞘翅目昆虫(19科43属49种)次之,而蜚蠊目和革翅目昆虫(1科1属1种)最少。物种多样性指数分析表明,武进区半翅目昆虫的多样性指数(4.0132)和均匀度指数(0.9926)最高,优势度指数(0.0248)最低;鞘翅目昆虫的丰富度指数(8.4555)最高。武进区不同生境中昆虫多样性指数和丰富度指数均表现为草地灌木>森林>水域>耕地>居民地;优势度指数表现为居民地>耕地>水域>森林>草地灌木;均匀度指数表现为森林>草地灌木>水域>耕地>居民地。武进区昆虫在世界动物地理分布中具有典型的东洋界分布类型,与古北界关系密切;在中国动物地理分布中,武进区昆虫分布组成以全国、华中区、华中区—华南区、华中区—华南区—西南区、华中区—华南区—西南区—华北区5种分布型为主。  相似文献