Synchronization in renal microcirculation unveiled with high-resolution blood flow imaging
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Synchronization in renal microcirculation unveiled with high-resolution blood flow imaging. / Postnov, Dmitry; Marsh, Donald J; Cupples, Will A; Holstein-Rathlou, Niels-Henrik; Sosnovtseva, Olga.
I: eLife, Bind 11, :e75284, 06.05.2022, s. 1-13.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Synchronization in renal microcirculation unveiled with high-resolution blood flow imaging
AU - Postnov, Dmitry
AU - Marsh, Donald J
AU - Cupples, Will A
AU - Holstein-Rathlou, Niels-Henrik
AU - Sosnovtseva, Olga
N1 - © 2022, Postnov et al.
PY - 2022/5/6
Y1 - 2022/5/6
N2 - Internephron interaction is fundamental for kidney function. Earlier studies have shown that nephrons signal to each other, synchronise over short distances, and potentially form large synchronised clusters. Such clusters would play an important role in renal autoregulation, but due to the technological limitations, their presence is yet to be confirmed. In the present study, we introduce an approach for high-resolution laser speckle imaging of renal blood flow and apply it to estimate frequency and phase differences in rat kidney microcirculation under different conditions. The analysis unveiled spatial and temporal evolution of synchronised blood flow clusters of various sizes, including the formation of large (>90 vessels) long-lived clusters (>10 periods) locked at the frequency of the tubular glomerular feedback mechanism. Administration of vasoactive agents caused significant changes in the synchronisation patterns and, thus, in nephrons' co-operative dynamics. Specifically, infusion of vasoconstrictor angiotensin II promoted stronger synchronisation, while acetylcholine caused complete desynchronisation. The results confirm the presence of the local synchronisation in the renal microcirculatory blood flow and that it changes depending on the condition of the vascular network and the blood pressure, which will have further implications for the role of such synchronisation in pathologies development.
AB - Internephron interaction is fundamental for kidney function. Earlier studies have shown that nephrons signal to each other, synchronise over short distances, and potentially form large synchronised clusters. Such clusters would play an important role in renal autoregulation, but due to the technological limitations, their presence is yet to be confirmed. In the present study, we introduce an approach for high-resolution laser speckle imaging of renal blood flow and apply it to estimate frequency and phase differences in rat kidney microcirculation under different conditions. The analysis unveiled spatial and temporal evolution of synchronised blood flow clusters of various sizes, including the formation of large (>90 vessels) long-lived clusters (>10 periods) locked at the frequency of the tubular glomerular feedback mechanism. Administration of vasoactive agents caused significant changes in the synchronisation patterns and, thus, in nephrons' co-operative dynamics. Specifically, infusion of vasoconstrictor angiotensin II promoted stronger synchronisation, while acetylcholine caused complete desynchronisation. The results confirm the presence of the local synchronisation in the renal microcirculatory blood flow and that it changes depending on the condition of the vascular network and the blood pressure, which will have further implications for the role of such synchronisation in pathologies development.
U2 - 10.7554/eLife.75284
DO - 10.7554/eLife.75284
M3 - Journal article
C2 - 35522041
VL - 11
SP - 1
EP - 13
JO - eLife
JF - eLife
SN - 2050-084X
M1 - :e75284
ER -
ID: 306293651