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MR Spectroscopy Imaging Visualizes Inside Brain Tumors

By MedImaging International staff writers
Posted on 26 Jan 2012
Image: Using MR spectroscopy, a team of researchers has developed a way to measure whether brain tumors have a mutation in a gene called IDH. The tissue being analyzed is inside the red boxes. The tumor on the left has the mutation, while the tumor on the right does not (Photo courtesy of MIT).
Image: Using MR spectroscopy, a team of researchers has developed a way to measure whether brain tumors have a mutation in a gene called IDH. The tissue being analyzed is inside the red boxes. The tumor on the left has the mutation, while the tumor on the right does not (Photo courtesy of MIT).
New imaging technology could help researchers assess new drugs for treating brain cancer.

Gliomas, the most common types of brain tumor, are also among the most lethal of cancers: Their mortality rate is almost 100%, partly because few treatments exist. A team of researchers from the Massachusetts Institute of Technology (MIT; Cambridge, MA, USA), Harvard University (Cambridge, MA, USA), Massachusetts General Hospital (MGH; Boston, MA, USA) and Agios Pharmaceuticals (Cambridge, MA, USA) has now developed a way to identify a particular subset of brain tumors, which may help physicians choose treatments and create new drugs that target the disease’s underlying genetic mutation.

Scientists have known for some time that many brain tumors involve a mutation in the gene for an enzyme called isocitrate dehydrogenase (IDH). This enzyme is involved in cell metabolism--the process of breaking down glucose molecules to extract energy from them. IDH mutations are found in up to 86% of low-grade gliomas, which have a better prognosis than high-grade gliomas, also called glioblastomas. Patients with low-grade gliomas can survive for years, although the tumors nearly always prove fatal.

Several pharmaceutical companies are now pursuing drugs that target IDH, in hopes of halting tumor growth. Some of those agents may enter clinical trials within the year, reported Dr. Matthew Vander Heiden, a member of the David H. Koch Institute for Integrative Cancer Research at MIT.

Dr. Vander Heiden is part of the team that developed imaging technology to reveal whether brain tumors have the IDH mutation, which could help researchers track whether potential drugs are having the desired effect. The researchers described their technique in the January 11, 2012, online edition of the journal Science Translational Medicine.

When IDH is mutated, a tumor cell begins to generate mass quantities of a molecule called 2-hydroxyglutarate (2-HG). Earlier studies had revealed that 2-HG interferes with the regulation of DNA expression, causing the cell to regress to an immature state conducive to uncontrolled growth. IDH mutations are also found in some forms of leukemia, and rarely, in other cancers.

The new imaging technique uses magnetic resonance (MR) spectroscopy, which analyzes the magnetic properties of atomic nuclei, to locate 2-HG in the brain. Other researchers have tried to image 2-HG with MR spectroscopy, but found it difficult to differentiate 2-HG from some of the brain’s common metabolites, such as glutamate and glutamine.

MGH researchers led by Dr. Greg Sorensen and Dr. Ovidiu Andronesi, the lead author of the article, found an unequivocal way to identify 2-HG by doing the MR scans in two dimensions, which provides enough data to distinguish conclusively 2-HG from similar compounds. The imaging technique does not require any specialized equipment; it can be performed with the clinical MRI scanners already found in most hospitals.

“The most exciting thing about this is it opens up the possibility that as drugs against gliomas come online, you could know which patients with brain tumors to put in the clinical trials, and you would know if the drug you’re giving them is actually doing what it’s supposed to do,” stated Vander Heiden, a professor of biology at MIT.

Presently, the only way to measure 2-HG levels is by taking a brain biopsy and performing mass spectrometry on the tissue. This is typically done when a brain tumor is first diagnosed, but cannot be done on a regular basis, reported Dr. Hai Yan, an assistant professor of pathology at Duke University (Durham, NC, USA). “If you can detect [2-HG] in the tissue or blood, it would allow physicians to tell if treatments for the tumor have been effective or not,” said Dr. Yan, who was not involved in this study.

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87 (56.982040405273): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
88 (30.994415283203): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (50.067901611328): SELECT id,name,title FROM jos_deeppockets WHERE cat=10 AND TYPE='file_folder' AND published=1 AND id != 294743300 AND id != 294743301 AND id != 294743302 AND id != 294743303 AND id != 294743304 AND id != 294743305 AND id != 294743306 AND id != 294743307 AND id != 294743308 AND id != 294743309 AND id != 294743310 AND metakey != 'aacc' ORDER BY `ordering`
90 (60.081481933594): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (53.882598876953): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
105 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
106 (70.810317993164): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (65.088272094727): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (102.99682617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
109 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
110 (86.069107055664): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (574.11193847656): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (785.82763671875): 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 (564.8136138916): 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 (164.98565673828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
115 (73.19450378418): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
116 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
117 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
118 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
119 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
120 (116.82510375977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
121 (62.227249145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
122 (424.14665222168): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 49119.94934082): 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 (706.91108703613): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294739022 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294739022 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 27871.131896973): ( 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 (136.8522644043): ( 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 (124.93133544922): 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 (52.928924560547): 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 (57.93571472168): 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 (31.948089599609): 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 (364.06517028809): 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 (36.001205444336): 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 (30.994415283203): 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 (602.00691223145): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (488.9965057373): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (54.121017456055): SELECT name FROM jos_deeppockets WHERE id=212
138 (41.007995605469): SELECT name FROM jos_deeppockets WHERE id=212
139 (766.03889465332): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (628.94821166992): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (108.00361633301): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
142 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
143 (!!!!! 18690.10925293): TRUNCATE TABLE jos_trademed_module
144 (!!!!! 1653.9096832275): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (70.095062255859): 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=294739022 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (398.87428283691): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (182.15179443359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (63.180923461914): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
149 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
150 (!!!!! 1192.0928955078): 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 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
152 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
153 (33.855438232422): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294739022 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294739022 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (29.087066650391): 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 (27.179718017578): 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 (30.040740966797): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 1926.8989562988): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
158 (108.95729064941): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294739022 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294739022 AND published='1' LIMIT 1
159 (69.141387939453): select jos_twitters.link from jos_twitters where cat=10
160 (32.901763916016): select jos_facebook.link from jos_facebook where cat=10
161 (34.093856811523): select jos_google_plus.link from jos_google_plus where cat=10
162 (31.948089599609): select jos_linkedin.link from jos_linkedin where cat=10
163 (308.03680419922): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (888.82446289062): insert into jos_banners_delta values (14615,'2025-06-26 14:47:22','216.73.216.249','view'),(14202,'2025-06-26 14:47:22','216.73.216.249','view'),(14203,'2025-06-26 14:47:22','216.73.216.249','view')