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Lovelock, Caroline E.,Cordonnier, Charlotte,Naka, Hiromitsu,Al-Shahi Salman, Rustam,Sudlow, Cathie L.M.,Sorimachi, Takatoshi,Werring, David J.,Gregoire, Simone M.,Imaizumi, Toshio,Lee, Seung-Hoon,Bril Ovid Technologies Wolters Kluwer -American Heart A 2010 Stroke Vol.41 No.6
<P>Cerebral microbleeds (MB) are potential risk factors for intracerebral hemorrhage (ICH), but it is unclear if they are a contraindication to using antithrombotic drugs. Insights could be gained by pooling data on MB frequency stratified by antithrombotic use in cohorts with ICH and ischemic stroke (IS)/transient ischemic attack (TIA).</P>
P110β in the ventromedial hypothalamus regulates glucose and energy metabolism
Teppei Fujikawa,최윤희,양동주,신동민,Jose Donato Jr.,Daisuke Kohno,Charlotte E. Lee,Carol F. Elias,Syann Lee,김기우 생화학분자생물학회 2019 Experimental and molecular medicine Vol.51 No.-
Phosphoinositide 3-kinase (PI3K) signaling in hypothalamic neurons integrates peripheral metabolic cues, including leptin and insulin, to coordinate systemic glucose and energy homeostasis. PI3K is composed of different subunits, each of which has several unique isoforms. However, the role of the PI3K subunits and isoforms in the ventromedial hypothalamus (VMH), a prominent site for the regulation of glucose and energy homeostasis, is unclear. Here we investigated the role of subunit p110β in steroidogenic factor-1 (SF-1) neurons of the VMH in the regulation of metabolism. Our data demonstrate that the deletion of p110β in SF-1 neurons disrupts glucose metabolism, rendering the mice insulin resistant. In addition, the deletion of p110β in SF-1 neurons leads to the whitening of brown adipose tissues and increased susceptibility to diet-induced obesity due to blunted energy expenditure. These results highlight a critical role for p110β in the regulation of glucose and energy homeostasis via VMH neurons.
Creation of Consistent Burn Wounds: A Rat Model
Cai, Elijah Zhengyang,Ang, Chuan Han,Raju, Ashvin,Tan, Kong Bing,Hing, Eileen Chor Hoong,Loo, Yihua,Wong, Yong Chiat,Lee, Hanjing,Lim, Jane,Moochhala, Shabbir M.,Hauser, Charlotte A.E.,Lim, Thiam Chye Korean Society of Plastic and Reconstructive Surge 2014 Archives of Plastic Surgery Vol.41 No.4
Background Burn infliction techniques are poorly described in rat models. An accurate study can only be achieved with wounds that are uniform in size and depth. We describe a simple reproducible method for creating consistent burn wounds in rats. Methods Ten male Sprague-Dawley rats were anesthetized and dorsum shaved. A 100 g cylindrical stainless-steel rod (1 cm diameter) was heated to $100^{\circ}C$ in boiling water. Temperature was monitored using a thermocouple. We performed two consecutive toe-pinch tests on different limbs to assess the depth of sedation. Burn infliction was limited to the loin. The skin was pulled upwards, away from the underlying viscera, creating a flat surface. The rod rested on its own weight for 5, 10, and 20 seconds at three different sites on each rat. Wounds were evaluated for size, morphology and depth. Results Average wound size was $0.9957cm^2$ (standard deviation [SD] 0.1845) (n=30). Wounds created with duration of 5 seconds were pale, with an indistinct margin of erythema. Wounds of 10 and 20 seconds were well-defined, uniformly brown with a rim of erythema. Average depths of tissue damage were 1.30 mm (SD 0.424), 2.35 mm (SD 0.071), and 2.60 mm (SD 0.283) for duration of 5, 10, 20 seconds respectively. Burn duration of 5 seconds resulted in full-thickness damage. Burn duration of 10 seconds and 20 seconds resulted in full-thickness damage, involving subjacent skeletal muscle. Conclusions This is a simple reproducible method for creating burn wounds consistent in size and depth in a rat burn model.