Microvascular

Hypothermia—Indirect cryodestruction Metabolic uncoupling Energy deprivation Ionic imbalance Disruption of acid-base balance Waste accumulation Membrane phase transitions Cytoskeletal disassembly Frozen State—Direct cryodestruction Water solidification Hyperosmolality Cell-volume disruption Protein denaturation Tissue shearing Intracellular-ice propagation Membrane disruption Microvascular Thawed State Direct effects... 

Ring J, Endrich B, Intaglietta M Histamine release, complement consumption, and microvascular changes after radiographic contrast media infusion in rabbits. J 43 Lab Clin Med 1978 92 584-594. 

After mRNA splicing, the tropoelastin mRNA is translated at the surface of the rough endoplasmic reticulum (RER) in a variety of cells smooth muscle cells, endothelial and microvascular cells, chondrocytes and fibroblasts. The approximately 70 kDa precursor protein (depending on isoform) is synthesized with an N-terminal 26-amino-acid signal peptide. This nascent polypeptide chain is transported into the lumen of the RER, where the signal peptide is removed cotranslationally [9]. 

Estradiol Medroxyprogesterone acetate Human microvascular endometrial endothelial cells Affymetrix U133A E2 10- M, MDA lO- Mfor 48 h Gene name, fold change 117... 

Paris D, Ait-Ghezala G, Mathura VS, Patel N, Quadros A, Laporte V, et al. Anti-angiogenic activity of the mntant Dntch A(beta) peptide on human brain microvascular endothelial cells. Brain Res Mol Brain Res 2005 136 212-30. 

Nakamuta S, Endo H, Higashi Y, Kousaka A, Yamada H, Yano M, Kido H (2008) Human immunodeficiency virus type 1 gpl20-mediated disruption of tight junction proteins by induction of proteasome-mediated degradation of zonula occludens-1 and -2 in human brain microvascular endothelial cells. J Neurovirol 14 186-195... 

With modest impairment of blood flow, this mechanism allows for preservation of oxidative metabolism without alteration in electrical function. However, when CPP and therefore CBF are sufficiently low, OEF reaches a maximum and cannot increase further. Brain tissue ceases to function electrically, resulting in a neurologic deficit. Microvascular collapse occurs, and CBV falls. If the oxygen supply falls low enough, the tissue dies. Of critical clinical importance is the observation that the amount of time it takes for tissue to suffer irreversible damage is inversely related to the severity of the ischemic insult. Tissue that is completely deprived of blood will die within a few minutes, but less severely hypoperfused tissue may survive for many hours, and may be saved by timely thrombolysis that restores perfusion, or perhaps by another therapeutic intervention. 

Belayev L, Pinard E, Nallet H, Seylaz J, Liu Y, Riyamongkol P, Zhao W, Busto R, Ginsberg MD. Albumin therapy of transient focal cerebral ischemia in vivo analysis of dynamic microvascular responses. Stroke 2002 33 1077-1084. 

Early studies indicate that combined GP Ilb/IIIa inhibition with rt-PA thrombolysis may improve clinical and MRI outcomes after acute ischemic stroke, with an acceptable safety prohle. The dual targeting of platelets and hbrin by combination therapy may provide synergistic benefits, including increased arterial recanalization, reduced microvascular thrombosis, reduced arterial reocclusion, and less rt-PA-mediated blood-brain barrier injury and secondary activation of the coagulation system. 

Youdim, K.A. et al.. Potential role of dietary flavonoids in reducing microvascular endothehum vulnerability to oxidative and inflammatory insults, J. Nutr. Biochem., 13, 282, 2002. 

Naito, Y., Yoshikawa, T., Kaneko, T., linuma, S., Takahashi, S. and Kondo, M. (1992). Role of active oxygens in indomethacin-induced gastric mucosal microvascular injury in rats. Gastroenterology 102, A131. 

HMW High molecular weight HMT Histidine methyltransferase HMVEC Human microvascular endothelial cell... 

Increased oxygen demand secondary to increased heart rates and blood pressure has been hypothesized to lead to myocardial infarction (especially in patients with fixed coronary disease) and/or ventricular arrhythmias. In patients with no history of cardiac disease, cocaine is thought to induce acute isehemie complications via vasospasm of the coronaries (Ascher et al. 1988). In addition, Virmani et al. (1988) have reported a 20 percent incidence of myocarditis thought to be secondary to accumulated microvascular injuries. 

Corticosteroids are the most potent anti-inflammatory agents available for the treatment of asthma. The efficacy of corticosteroids is due to their ability to affect multiple inflammatory pathways, resulting in the suppression of inflammatory cell activation and function, prevention of microvascular leakage, decreased mucus production, and upregulation of P2-adrenergic receptors.10,18 Clinically, corticosteroids decrease airway inflammation, decrease AHR, decrease mucus production and secretion, and improve the response to P2-agonists.18 Corticosteroids for the treatment of asthma are available in inhaled, oral, and injectable dosage forms. 

O Diabetes mellitus (DM) describes a group of chronic metabolic disorders that are characterized by hyperglycemia and are associated with long-term microvascular, macrovascular, and neuropathic complications. 

A primary concern when administering PN is safety. The FDA published a safety alert in 1994 in response to two deaths associated with TNA infusion.16 Autopsy reports from these patients revealed diffuse microvascular pulmonary emboli I containing calcium-phosphate precipitates. The FDA provided... 

Salcedo R, Resau JH, Halverson D, et al. Differential expression and responsiveness of chemokine receptors (CXCR1-3) by human microvascular endothelial cells and umbilical vein endothelial cells. FASEB J 2000 14(13) 2055-2064. 

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