Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Targeted capillary photothrombosis via multiphoton excitation of Rose Bengal
 
research article

Targeted capillary photothrombosis via multiphoton excitation of Rose Bengal

Delafontaine-Martel, Patrick
•
Zhang, Cong
•
Lu, Xuecong
Show more
January 17, 2023
Journal of Cerebral Blood Flow & Metabolism

Microvascular stalling, the process occurring when a capillary temporarily loses perfusion, has gained increasing interest in recent years through its demonstrated presence in various neuropathologies. Studying the impact of such stalls on the surrounding brain tissue is of paramount importance to understand their role in such diseases. Despite efforts trying to study the stalling events, investigations are hampered by their elusiveness and scarcity. In an attempt to alleviate these hurdles, we present here a novel methodology enabling transient occlusions of targeted microvascular segments through multiphoton excitation of Rose Bengal, an established photothrombotic agent. With n = 7 mice C57BL/6 J (5 males and 2 females) and 95 photothrombosis trials, we demonstrate the ability of triggering reversible blockages by illuminating a capillary segment during similar to 300 s at 1000 nm, using a standard Ti:Sapphire femtosecond laser. Furthermore, we performed concurrent Optical Coherence Microscopy (OCM) angiography imaging of the microvascular network to highlight the specificity of the targeted occlusion and its duration. Through comparison with a control group, we conclude that blood flow cessation is indeed created by the photothrombotic agent via multiphoton excitation and is temporary, followed by a flow recovery in less than 24 h. Moreover, Immunohistology points toward a stalling mechanism driven by adherence of the neutrophil in the vascular lumen. This observation seems to be promoted by the inflammation locally created via multiphoton activation of Rose Bengal.

  • Details
  • Metrics
Type
research article
DOI
10.1177/0271678X231151560
Web of Science ID

WOS:000916318900001

Author(s)
Delafontaine-Martel, Patrick
Zhang, Cong
Lu, Xuecong
Damseh, Rafat
Lesage, Frederic
Marchand, Paul J.  
Date Issued

2023-01-17

Published in
Journal of Cerebral Blood Flow & Metabolism
Subjects

Endocrinology & Metabolism

•

Hematology

•

Neurosciences

•

Endocrinology & Metabolism

•

Hematology

•

Neurosciences & Neurology

•

capillary

•

multiphoton application

•

ocma

•

photothrombosis

•

rose bengal

•

two-photon microscopy

•

blood-flow

•

2-photon

•

microscopy

•

infarction

•

oxygen

•

tool

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Available on Infoscience
February 13, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/194824
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés