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Brilliant Dye Provides High-Resolution, 3D Views of the Cerebral Vascular System

By MedImaging International staff writers
Posted on 22 May 2013
Image: Cerebral vascular system of a mouse obtained by 3D two-photon microscopy with addition of Lem-PHEA (Photo courtesy of B. van der Sanden and F. Appaix, Institut des Neurosciences de Grenoble).
Image: Cerebral vascular system of a mouse obtained by 3D two-photon microscopy with addition of Lem-PHEA (Photo courtesy of B. van der Sanden and F. Appaix, Institut des Neurosciences de Grenoble).
To obtain very high-resolution, three-dimensional (3D) images of the cerebral vascular system, French researchers are evaluating a new dye that fluoresces in the near infrared and can pass through the skin.

The Lem-PHEA chromophore new dye technology has been developed by a team from the laboratoire de chimie at the Centre National de la Recherche Scientifique [CNRS]/ENS de Lyon/Université Claude Bernard Lyon 1 (France). Conducted in collaboration with researchers from the Institut des Neurosciences (Université Joseph Fourier-Grenoble /CEA/Inserm /CHU; France) and the Laboratoire Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CNRS/Université de Nantes; France), this project’s findings were published online April 29, 2013, in the journal Chemical Science. The technology creates significant ways to better visualize the brain and better determine how it functions.

Different cerebral imaging techniques, such as two-photon microscopy or magnetic resonance imaging (MRI), contribute to a better understanding of how the healthy or diseased brain works. One of their basic characteristics is their spatial resolution, meaning, the level of the smallest details visualized by each technique. Typically, for MRI, this resolution is limited to several millimeters, which does not make it possible to capture images such as the new dye can obtain, with a resolution on the order of a micrometer.

To obtain such images of the vascular system of a mouse brain, it is necessary to use a fluorescent dye that combines several characteristics: luminescence in the near infrared, biologic media solubility, low cost, nontoxicity and suitable for 3D imaging (two-photon absorption). The researchers have developed the new product, Lem-PHEA, which combines these very properties and is easy to synthesize.

When injected into the blood vessels of a mouse, it has revealed details of the rodent’s vascular system with never before actualized precision, due to a considerably enhanced fluorescence compared to standard dyes (such as rhodamine-B and cyanine derivatives). With Lem-PHEA, the researchers have obtained more contrasted images (in terms of brilliance) than with these conventional dyes. Finally, the dye is easily eliminated by the kidneys and no toxic residues have been found in the liver. These new findings pave the way for a better understanding of the working of the brain, according to the researchers.

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Université Claude Bernard Lyon 1
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Université de Nantes


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93 (33.140182495117): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
105 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
106 (51.975250244141): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (42.915344238281): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
109 (92.029571533203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
110 (51.975250244141): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (476.12190246582): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (650.88272094727): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
113 (524.04403686523): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
114 (93.936920166016): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
115 (119.20928955078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
116 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
117 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
118 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
119 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
120 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
121 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
122 (359.05838012695): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 26771.068572998): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
124 (655.17425537109): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294746416 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294746416 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 10306.119918823): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
126 (99.897384643555): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
127 (382.1849822998): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
128 (70.095062255859): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
129 (287.05596923828): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
130 (48.160552978516): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
131 (255.82313537598): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
132 (46.968460083008): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
133 (252.96211242676): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
134 (65.088272094727): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
135 (592.94700622559): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (447.98851013184): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (242.94853210449): SELECT name FROM jos_deeppockets WHERE id=212
138 (47.922134399414): SELECT name FROM jos_deeppockets WHERE id=212
139 (818.01414489746): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (658.98895263672): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (94.890594482422): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
142 (67.234039306641): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
143 (!!!!! 9492.8741455078): TRUNCATE TABLE jos_trademed_module
144 (97.990036010742): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (131.13021850586): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294746416 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (897.16911315918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (81.777572631836): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (97.990036010742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
149 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
150 (!!!!! 1546.8597412109): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
151 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
152 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
153 (58.174133300781): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294746416 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294746416 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (41.961669921875): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
155 (40.054321289062): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=212 or channel_id is null)
156 (42.915344238281): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (155.21049499512): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
158 (106.0962677002): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294746416 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294746416 AND published='1' LIMIT 1
159 (114.91775512695): select jos_twitters.link from jos_twitters where cat=10
160 (46.014785766602): select jos_facebook.link from jos_facebook where cat=10
161 (39.815902709961): select jos_google_plus.link from jos_google_plus where cat=10
162 (42.915344238281): select jos_linkedin.link from jos_linkedin where cat=10
163 (360.01205444336): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1091.0034179688): insert into jos_banners_delta values (14615,'2025-06-25 15:31:27','216.73.216.120','view'),(14202,'2025-06-25 15:31:27','216.73.216.120','view'),(14203,'2025-06-25 15:31:27','216.73.216.120','view')