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Imaging Agents Offer New View of Inflammation and Cancer

By MedImaging International staff writers
Posted on 26 Oct 2011
A series of novel imaging agents may soon make it possible to visualize tumors in their earliest stages, before they turn fatal. The compounds, derived from inhibitors of the enzyme cyclooxygenase-2 (COX-2) and detectable by positron emission tomography (PET) imaging, may have wide applications for cancer detection, diagnosis, and treatment.

Vanderbilt University (Nashville, TN, USA) investigators described the new imaging agents in an article published in the October 2011 issue of the journal Cancer Prevention Research. “This is the first COX-2-targeted PET imaging agent validated for use in animal models of inflammation and cancer,” said Lawrence Marnett, PhD, director of the Vanderbilt Institute of Chemical Biology and leader of the team that developed the compounds.

COX-2 is a promising target for molecular imaging. It is not found in most healthy tissues, and then it is activated in inflammatory lesions and tumors, Dr. Marnett explained. “As a tumor grows and becomes increasingly malignant, COX-2 levels go up,” he said.

To develop compounds that target COX-2 and that can be detected by PET imaging, Jashim Uddin, PhD, research assistant ,professor of biochemistry, began with the basic chemical structures of the anti-inflammatory medicines indomethacin and celecoxib and modified them to add the element fluorine in various chemical arrangements.

After demonstrating that the fluorinated compounds were selective inhibitors of COX-2, the investigators incorporated radioactive fluorine (F-18) into the most promising compound. Intravenous injection of this F-18 compound into animal models provided sufficient signal for PET imaging.

The researchers demonstrated the potential of this F-18 compound for in vivo PET imaging in two animal models: irritant-induced inflammation in the rat footpad and human tumors grafted into mice. They showed that the F-18 compound accumulated in the inflamed foot, but not the noninflamed foot, and that pretreatment of the animals with celecoxib blocked the signal. In mice bearing both COX-2-positive and COX-2-negative human tumors, the F-18 compound accumulated only in the COX-2-positive tumor.

The studies support additional development of these agents as probes for early detection of cancer and for the assessment of the COX-2 status of premalignant and malignant tumors. “Because COX-2 levels increase during cancer progression in virtually all solid tumors, we think these imaging tools will have many, many different applications,” Dr. Marnett concluded.

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98 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
105 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (49.829483032227): 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
109 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
110 (66.041946411133): 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (575.06561279297): 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (602.96058654785): 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 (380.9928894043): 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 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
115 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
116 (!!!!! 1028.0609130859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
117 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
118 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
119 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
120 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
121 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
122 (325.91819763184): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 19562.005996704): 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 (558.13789367676): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294737766 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294737766 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 9196.9966888428): ( 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 (77.962875366211): ( 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 (!!!!! 4804.1343688965): 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 (115.87142944336): 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 (521.18301391602): 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 (180.00602722168): 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 (!!!!! 1457.9296112061): 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 (822.06726074219): 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 (!!!!! 1237.8692626953): 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 (51.975250244141): 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 (536.91864013672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (392.19856262207): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (209.09309387207): SELECT name FROM jos_deeppockets WHERE id=213
138 (32.901763916016): SELECT name FROM jos_deeppockets WHERE id=213
139 (625.8487701416): 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 '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (550.98533630371): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (334.9781036377): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
142 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
143 (!!!!! 19488.096237183): TRUNCATE TABLE jos_trademed_module
144 (103.95050048828): 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (53.167343139648): 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=294737766 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (659.94262695312): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (134.94491577148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
149 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
150 (!!!!! 1536.1309051514): 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 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
152 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
153 (38.862228393555): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294737766 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294737766 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (34.093856811523): 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=213 or channel_id is null)
155 (39.100646972656): 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=213 or channel_id is null)
156 (57.93571472168): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
158 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294737766 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294737766 AND published='1' LIMIT 1
159 (105.14259338379): select jos_twitters.link from jos_twitters where cat=10
160 (29.087066650391): select jos_facebook.link from jos_facebook where cat=10
161 (27.894973754883): select jos_google_plus.link from jos_google_plus where cat=10
162 (26.941299438477): select jos_linkedin.link from jos_linkedin where cat=10
163 (352.14424133301): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1077.8903961182): insert into jos_banners_delta values (14615,'2025-06-21 19:02:21','216.73.216.120','view'),(14202,'2025-06-21 19:02:21','216.73.216.120','view'),(14203,'2025-06-21 19:02:21','216.73.216.120','view')