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10.1016/j.jtbi.2017.03.019 http://scihub22266oqcxt.onion/10.1016/j.jtbi.2017.03.019 C5569889!5569889 !28363864     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28363864 &cmd=llinks): Failed to open stream: HTTP request failed! 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Alveolar septal patterning during compensatory lung growth: Part II the effect of parenchymal pressure gradients |pdf=|usr=}}{{28363864 }} gab.com Text Alveolar septal patterning during compensatory lung growth: Part II the effect of parenchymal pressure gradients JO: J Theor Biol http://www.kidney.de/pget.php?&tw=1&pmid=28363864 #FOAvip In most mammals, compensatory lung growth occurs after the removal of one lung (pneumonectomy). Although the mechanism of alveolar growth is unknown, the patterning of complex alveolar geometry over organ-sized length scales is a central question in regenerative lung biology. Because shear forces appear capable of signaling the differentiation of important cells involved in neoalveolarization (fibroblasts and myofibroblasts), interstitial fluid mechanics provide a potential mechanism for the patterning of alveolar growth. The movement of interstitial fluid is created by two basic mechanisms: 1) the non-uniform motion of the boundary walls, and 2) parenchymal pressure gradients external to the interstitial fluid. In a previous study (Haber et al., Journal of Theoretical Biology 400: 118-128, 2016), we investigated the effects of non-uniform stretching of the primary septum (associated with its heterogeneous mechanical properties) during breathing on generating non-uniform Stokes flow in the interstitial space. In the present study, we analyzed the effect of parenchymal pressure gradients on interstitial flow. Dependent upon lung microarchitecture and physiologic conditions, parenchymal pressure gradients had a significant effect on the shear stress distribution in the interstitial space of primary septa. A dimensionless parameter ? described the ratio between the effects of a pressure gradient and the influence of non-uniform primary septal wall motion. Assuming that secondary septa are formed where shear stresses were the largest, it is shown that the geometry of the newly generated secondary septa was governed by the value of ?. For ? smaller than 0.26, the alveolus size was halved while for higher values its original size was unaltered. We conclude that the movement of interstitial fluid, governed by parenchymal pressure gradients and non-uniform primary septa wall motion, provides a plausible mechanism for the patterning of alveolar growth. Twit Text FOAVip Alveolar septal patterning during compensatory lung growth: Part II the effect of parenchymal pressure gradients ????J Theor Biol http://www.kidney.de/pget.php?&tw=1&pmid=28363864 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28363864 #FOAvip English Wikipedia <ref>{{Cite pmid|28363864 }}</ref> Alveolar septal patterning during compensatory lung growth: Part II the effect of parenchymal pressure gradients #MMPMID28363864 Haber S ; Weisbord M ; Mentzer SJ ; Tsuda A J Theor Biol 2017[May]; 421 (ä): 168-178 PMID28363864 show ga In most mammals, compensatory lung growth occurs after the removal of one lung (pneumonectomy). Although the mechanism of alveolar growth is unknown, the patterning of complex alveolar geometry over organ-sized length scales is a central question in regenerative lung biology. Because shear forces appear capable of signaling the differentiation of important cells involved in neoalveolarization (fibroblasts and myofibroblasts), interstitial fluid mechanics provide a potential mechanism for the patterning of alveolar growth. The movement of interstitial fluid is created by two basic mechanisms: 1) the non-uniform motion of the boundary walls, and 2) parenchymal pressure gradients external to the interstitial fluid. In a previous study (Haber et al., Journal of Theoretical Biology 400: 118-128, 2016), we investigated the effects of non-uniform stretching of the primary septum (associated with its heterogeneous mechanical properties) during breathing on generating non-uniform Stokes flow in the interstitial space. In the present study, we analyzed the effect of parenchymal pressure gradients on interstitial flow. Dependent upon lung microarchitecture and physiologic conditions, parenchymal pressure gradients had a significant effect on the shear stress distribution in the interstitial space of primary septa. A dimensionless parameter ? described the ratio between the effects of a pressure gradient and the influence of non-uniform primary septal wall motion. Assuming that secondary septa are formed where shear stresses were the largest, it is shown that the geometry of the newly generated secondary septa was governed by the value of ?. For ? smaller than 0.26, the alveolus size was halved while for higher values its original size was unaltered. We conclude that the movement of interstitial fluid, governed by parenchymal pressure gradients and non-uniform primary septa wall motion, provides a plausible mechanism for the patterning of alveolar growth. |*Biomechanical Phenomena [MESH] |Animals [MESH] |Body Patterning/*physiology [MESH] |Extracellular Fluid/*physiology [MESH] |Humans [MESH] |Lung/*growth & development [MESH] |Organogenesis/physiology [MESH] |Parenchymal Tissue/*physiology [MESH] |Pulmonary Alveoli/*growth & development [MESH]Alveolar septal patterning during compensatory lung growth: Part II th(epmc).pdf DeepDyve Pubget Overpricing