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MR Spectroscopic Imaging Reveals Metabolic Shift May Offer Early Cancer Clue

By MedImaging International staff writers
Posted on 26 Jul 2011
Cancer cells are well known for their altered metabolisms, which may help them produce the energy they need for rapid growth. Utilizing an emerging imaging technology, researchers have discovered that those metabolic shifts actually develop even before detectable tumors form. Moreover, the studies in mice with liver cancer show that the altered tumor metabolism shifts back before established tumors shrink.

“This may be an early diagnostic in liver cancer and a way to assess tumor response to treatment,” said Dr. Andrei Goga of the University of California, San Francisco (UCSF; USA). The researchers published their findings in the July 2011 issue of the journal Cell Metabolism.

The increased conversion of glucose into lactate had been observed in tumor cells in culture before, Dr. Goga explained. However, there had not been a good way to see those dynamic changes in glycolysis.

The investigators sought to change that using hyperpolarized 13C-pyruvate magnetic resonance spectroscopic imaging (MRSI) in mice whose cancer could be turned on and off via a single cancer-causing oncogene known as Myc. The imaging method made it possible to see the real-time conversion of pyruvate, a key product of glycolysis, into other metabolites as tumors began to grow and then to shrink. “The model allowed us to see what happens before a tumor forms,” Dr. Goga said.

What the researchers saw was that the conversion of pyruvate to lactate increased as tumors developed, with the conversion of pyruvate into alanine predominating very early in precancerous tissues. “We were surprised to see that very early shift,” Dr. Goga noted. They are not yet certain precisely what it means, but Dr. Goga suggests it may lead to new strategies to tackle cancer in those earliest stages.

When the oncogene was switched off in mice with liver tumors, changes in metabolism were apparent three days later. “The metabolism falls apart before there is any discernible regression,” Dr. Goga explained. “It suggests metabolic changes precede tumor formation and regression.”

The findings could lead to new ways to diagnose liver cancer in its early stages. Better therapies and new imaging methods to monitor their effectiveness are also sorely needed in liver cancer. That is because the disease most often develops in patients with cirrhosis and the fibrous connective tissue typically found in their livers can prevent tumors from visibly shrinking even as they die. Hyperpolarized 13C-pyruvate MRSI may offer a way to evaluate drugs’ effectiveness in such cases by visualizing changes in tumor metabolism. “What excites us is that this is a new insight into tumor biology in a way that was not possible before,” Dr. Goga stated. “It also has real potential for application in patients.”

In fact, the imaging technology they used is already being tested in an early clinical trial for patients with prostate cancer, another condition that cannot be assessed well by current imaging methods.

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93 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
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95 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
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 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (45.061111450195): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
105 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
106 (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 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=294736275 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=294736275 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 1109.1232299805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
109 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
110 (51.021575927734): 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=294736275 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (590.80123901367): 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=294736275 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (522.13668823242): 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 (308.99047851562): 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 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
115 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
116 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
117 (36.954879760742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
118 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
119 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
120 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
121 (36.001205444336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
122 (383.85391235352): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 25775.909423828): 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 (921.01097106934): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736275 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736275 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 24004.936218262): ( 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 (262.02201843262): ( 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 (566.00570678711): 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 (195.02639770508): 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 (255.10787963867): 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 (36.001205444336): 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 (908.13636779785): 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 (36.954879760742): 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 (32.901763916016): 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 (30.040740966797): 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 (554.80003356934): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (337.12387084961): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (36.954879760742): SELECT name FROM jos_deeppockets WHERE id=212
138 (29.087066650391): SELECT name FROM jos_deeppockets WHERE id=212
139 (542.16384887695): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (438.92860412598): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
142 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
143 (!!!!! 7587.194442749): TRUNCATE TABLE jos_trademed_module
144 (91.075897216797): 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=294736275 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (54.121017456055): 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=294736275 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (839.9486541748): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (51.975250244141): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
149 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
150 (!!!!! 1066.9231414795): 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 (51.975250244141): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
152 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
153 (31.948089599609): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736275 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736275 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (28.848648071289): 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 (26.941299438477): 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 (29.087066650391): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
158 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736275 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736275 AND published='1' LIMIT 1
159 (53.882598876953): select jos_twitters.link from jos_twitters where cat=10
160 (41.007995605469): select jos_facebook.link from jos_facebook where cat=10
161 (32.901763916016): select jos_google_plus.link from jos_google_plus where cat=10
162 (30.994415283203): select jos_linkedin.link from jos_linkedin where cat=10
163 (279.18815612793): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (972.98622131348): insert into jos_banners_delta values (14615,'2025-06-27 01:14:43','216.73.216.249','view'),(14202,'2025-06-27 01:14:43','216.73.216.249','view'),(14203,'2025-06-27 01:14:43','216.73.216.249','view')