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140], '36–48': [117], 'Putrescine': [119], 'concentration': [120], 'increased': [121], 'up': [122], '18': [124, 143], 'fell': [127], 'dramatically': [128], 'phase,': [132, 150], 'remaining': [133], 'Both': [136], 'spermidine': [137], 'spermine': [139], 'peaks': [141], 'not': [152], 'nearly': [153], 'as': [154, 156], 'putrescine.': [157], 'We': [158], 'discuss': [159], 'how': [160], 'this': [161], 'comprehensive': [162], 'study': [163], 'may': [164], 'help': [165], 'understand': [167], 'involvement': [169], 'polyamines': [171], 'control': [174], 'cell': [176], 'proliferation.': [177]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2075990367', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2022, 'cited_by_count': 1}, {'year': 2021, 'cited_by_count': 3}, {'year': 2019, 'cited_by_count': 2}, {'year': 2018, 'cited_by_count': 4}, {'year': 2017, 'cited_by_count': 1}, {'year': 2016, 'cited_by_count': 2}, {'year': 2015, 'cited_by_count': 2}, {'year': 2014, 'cited_by_count': 1}, {'year': 2012, 'cited_by_count': 1}], 'updated_date': '2024-08-21T09:02:18.311389', 'created_date': '2016-06-24'}