{
"METABOLOMICS WORKBENCH":{"STUDY_ID":"ST002699","ANALYSIS_ID":"AN004374","VERSION":"1","CREATED_ON":"May 5, 2023, 8:11 am"},

"PROJECT":{"PROJECT_TITLE":"Spatially resolved metabolomics and isotope tracing reveal dynamic metabolic responses of dentate granule neurons with acute stimulation","PROJECT_TYPE":"Mass spectometry imaging","PROJECT_SUMMARY":"Metabolomics of dentate gyrus in mouse hippocamal slices","INSTITUTE":"Harvard University","LAST_NAME":"Yellen","FIRST_NAME":"Gary","ADDRESS":"220 Longwood Ave","EMAIL":"gary_yellen@hms.harvard.edu","PHONE":"617-432-0137"},

"STUDY":{"STUDY_TITLE":"Spatially resolved metabolomics and isotope tracing reveal dynamic metabolic responses of dentate granule neurons with acute stimulation","STUDY_SUMMARY":"To define the metabolic adaptations of the neuron-enriched dentate granule cell layer within the native brain environment, we utilize acute hippocampal brain slices and perform fast metabolite preservation followed by mass spectrometry imaging (MALDI-MSI) to obtain spatially resolved metabolomics and isotope tracing data.","INSTITUTE":"Harvard University","LAST_NAME":"Yellen","FIRST_NAME":"Gary","ADDRESS":"220 Longwood Ave","EMAIL":"gary_yellen@hms.harvard.edu","PHONE":"617-432-0137"},

"SUBJECT":{"SUBJECT_TYPE":"Mammal","SUBJECT_SPECIES":"Mus musculus","TAXONOMY_ID":"10090"},
"SUBJECT_SAMPLE_FACTORS":[
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"Sample ID":"Fig2 N1 30 sec KCl",
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"Additional sample data":{"RAW_FILE_NAME":"n1_30sec kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig2 N1 1min KCl",
"Factors":{"Treatment":"1min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n1_1min kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig2 N1 2min KCl",
"Factors":{"Treatment":"2min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n1_2min kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig2 N1 3min KCl",
"Factors":{"Treatment":"3min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n1_3min kcl_dg-total ion count"}
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"Subject ID":"-",
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},
{
"Subject ID":"-",
"Sample ID":"Fig2 N2 30 sec KCl",
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"Additional sample data":{"RAW_FILE_NAME":"n2_30sec kcl_dg-total ion count"}
},
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"Sample ID":"Fig2 N2 1min KCl",
"Factors":{"Treatment":"1min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n2_1min kcl_dg-total ion count"}
},
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"Subject ID":"-",
"Sample ID":"Fig2 N2 2min KCl",
"Factors":{"Treatment":"2min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n2_2min kcl_dg-total ion count"}
},
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"Additional sample data":{"RAW_FILE_NAME":"n2_3min kcl_dg-total ion count"}
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"Additional sample data":{"RAW_FILE_NAME":"n4_2min kcl_dg-total ion count"}
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"Subject ID":"-",
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"Subject ID":"-",
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},
{
"Subject ID":"-",
"Sample ID":"Fig2 N5 30 sec KCl",
"Factors":{"Treatment":"30 sec KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n5_30sec kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig2 N5 1min KCl",
"Factors":{"Treatment":"1min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n5_1min kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Additional sample data":{"RAW_FILE_NAME":"n5_5min_dg-total ion count"}
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{
"Subject ID":"-",
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"Additional sample data":{"RAW_FILE_NAME":"n6_30sec kcl_dg-total ion count"}
},
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"Subject ID":"-",
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"Factors":{"Treatment":"1min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n6_1min kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"2min KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n6_2min kcl_dg-total ion count"}
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{
"Subject ID":"-",
"Sample ID":"Fig2 N6 3min KCl",
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"Subject ID":"-",
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"Subject ID":"-",
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},
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"Subject ID":"-",
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},
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"Additional sample data":{"RAW_FILE_NAME":"n7_5min_dg-total ion count"}
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"Sample ID":"Fig3 N1 unlabeled",
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},
{
"Subject ID":"-",
"Sample ID":"Fig3 N1 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n1_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n1_10min 13c gluc_dg-total ion count"}
},
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"Subject ID":"-",
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},
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"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n1_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N1 35min 13C Gluc",
"Factors":{"Treatment":"35min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n1_35min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N1 35min 13C Gluc KCl",
"Factors":{"Treatment":"35min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n1_35min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N2 unlabeled",
"Factors":{"Treatment":"unlabeled"},
"Additional sample data":{"RAW_FILE_NAME":"n2_unlabeled_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N2 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n2_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N2 10min 13C Gluc",
"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n2_10min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Additional sample data":{"RAW_FILE_NAME":"n2_10min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n2_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"35min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n2_35min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N2 35min 13C Gluc KCl",
"Factors":{"Treatment":"35min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n2_35min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N3 unlabeled",
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},
{
"Subject ID":"-",
"Sample ID":"Fig3 N3 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n3_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n3_10min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N3 10min 13C Gluc KCl",
"Factors":{"Treatment":"10min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n3_10min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n3_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Additional sample data":{"RAW_FILE_NAME":"n3_35min 13c gluc_dg-total ion count"}
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{
"Subject ID":"-",
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"Factors":{"Treatment":"35min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n3_35min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 unlabeled",
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},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n4_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 10min 13C Gluc",
"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n4_10min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 10min 13C Gluc KCl",
"Factors":{"Treatment":"10min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n4_10min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n4_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 35min 13C Gluc",
"Factors":{"Treatment":"35min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n4_35min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N4 35min 13C Gluc KCl",
"Factors":{"Treatment":"35min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n4_35min 13c gluc kcl_dg-total ion count"}
},
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"Subject ID":"-",
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},
{
"Subject ID":"-",
"Sample ID":"Fig3 N5 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n5_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N5 10min 13C Gluc",
"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n5_10min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N5 10min 13C Gluc KCl",
"Factors":{"Treatment":"10min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n5_10min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n5_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Factors":{"Treatment":"35min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n5_35min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
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"Additional sample data":{"RAW_FILE_NAME":"n5_35min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
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},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 5min 13C Gluc",
"Factors":{"Treatment":"5min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n6_5min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 10min 13C Gluc",
"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n6_10min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 10min 13C Gluc KCl",
"Factors":{"Treatment":"10min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n6_10min 13c gluc kcl_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 20min 13C Gluc",
"Factors":{"Treatment":"10min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n6_20min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 35min 13C Gluc",
"Factors":{"Treatment":"35min 13C Gluc"},
"Additional sample data":{"RAW_FILE_NAME":"n6_35min 13c gluc_dg-total ion count"}
},
{
"Subject ID":"-",
"Sample ID":"Fig3 N6 35min 13C Gluc KCl",
"Factors":{"Treatment":"35min 13C Gluc KCl"},
"Additional sample data":{"RAW_FILE_NAME":"n6_35min 13c gluc kcl_dg-total ion count"}
}
],
"COLLECTION":{"COLLECTION_SUMMARY":"Hippocampal slices were stimulated with 50mM potassium chloride over a time course of 5 minutes. The experiment was terminated with thermal preservation at the indicated time points.","SAMPLE_TYPE":"Brain"},

"TREATMENT":{"TREATMENT_SUMMARY":"50mM potassium chloride"},

"SAMPLEPREP":{"SAMPLEPREP_SUMMARY":"At the specific time chosen for thermal preservation, the slices were flash heated to 80°C for 2 seconds and then cooled to 4°C; the slices were then flash-frozen to -20 °C. The brain slices were stored at -80°C for subsequent thin sectioning in a cryomicrotome. The thin sections were mounted onto conductive glass slides (ITO slides) and sprayed with matrix (1,5-diaminonaphthalene)."},

"CHROMATOGRAPHY":{"CHROMATOGRAPHY_TYPE":"None (Direct infusion)","INSTRUMENT_NAME":"none","COLUMN_NAME":"none","SOLVENT_A":"none","SOLVENT_B":"none","FLOW_GRADIENT":"none","FLOW_RATE":"none","COLUMN_TEMPERATURE":"none"},

"ANALYSIS":{"ANALYSIS_TYPE":"MS"},

"MS":{"INSTRUMENT_NAME":"Bruker timsTOF fleX","INSTRUMENT_TYPE":"QTOF","MS_TYPE":"MALDI","ION_MODE":"NEGATIVE","MS_COMMENTS":"Mass spectra were acquired on a timsTOF fleX in negative ion mode. Hippocampal sections were outlined as individual ROIs with a pixel size of 20 µm. Most metabolites were acquired in a single imaging run (m/z range 50 - 1000). Each MSI pixel consisted of 1000 laser shots. The laser Smartbeam parameter was set to single with a frequency of 10 kHz.","MS_RESULTS_FILE":"ST002699_AN004374_Results.txt UNITS:a.u. Has m/z:Yes Has RT:No RT units:No RT data"}

}