کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1995503 1064977 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lymphangiogenesis following obstruction of large postnodal lymphatics in sheep
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Lymphangiogenesis following obstruction of large postnodal lymphatics in sheep
چکیده انگلیسی
We examined the impact of lymph flow obstruction in large post-nodal lymphatic vessels in sheep. A silk ligature was placed 2 cm downstream from the prescapular or popliteal lymph node and tightened to interrupt flow. At 6, 12 and 16 weeks after lymph flow blockage, a network of small interconnecting lymphatics (∼ 10-40 μm in diameter) could be observed in the vicinity of the ligature. These were identified using antibodies to the lymphatic endothelial markers LYVE-1 or VEGFR-3 or unequivocally, with the upstream intraluminal injection of the non-specific cell dye CFDA-SE. The observed lymphangiogenesis coincided with increased levels of Prox1, Tie2 (Y992) phosphorylation, MAPK activation, and decreased Akt activition. In the popliteal preparations, saline was infused into the prenodal ducts upstream of the regeneration site. The slopes of the inflow pressure versus flow relationships were 17.3 ± 3.6, immediately after vessel obstruction, 36.2 ± 9.6 at 6 weeks and 15.0 ± 5.3 at 12-16 weeks. For comparison, the average slope in a completely intact popliteal system was 3.1 ± 0.3 (from a previous publication). The resistance to flow remained high up to 12-16 weeks after flow obstruction suggesting that normal flow parameters had not been achieved over this time. The lymph node appeared to have some role in limiting the impact of post-nodal lymph obstruction, a function that appeared to be compromised by lymph stasis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microvascular Research - Volume 73, Issue 3, May 2007, Pages 214-223
نویسندگان
, , , , , , , ,