The journal Science recently retracted a controversial paper published 15 years ago, which claimed that a certain microorganism could sustain life by replacing phosphorus with the toxic element arsenic. Some scientists supported the decision to withdraw the manuscript, but the author team strongly opposed it, insisting that the data was reliable and the withdrawal lacked basis.
The editor-in-chief of "Science" explained in a statement that in the past, retractions were mainly focused on academic misconduct, but this study "did not involve intentional fraud", so the manuscript was not retracted due to criticism in the early years. But now journal standards have been adjusted, and if the experiments cannot support the core conclusions, the manuscript can be withdrawn. The microbiology community generally believes that the study has serious problems, and retracting it will help avoid misleading subsequent researchers. However, the authors of the paper countered that disputes over data interpretation should not be a reason for retraction, otherwise "half of the literature would need to be retracted."
In 2010, this study hypothesized that a bacterium in Mono Lake, California, may use arsenic instead of phosphorus to construct DNA, challenging the traditional understanding of essential elements for life. However, subsequent analysis showed that the trace amounts of phosphate remaining in its culture medium were sufficient to support bacterial growth, and chemists pointed out that the structure of arsenic-containing DNA was extremely unstable and would rapidly decompose in water. In 2011, Science published a number of questioning articles, but did not retract them at the time. This year, as the discussion heated up again, the journal finally decided to withdraw the paper.
The paper's author team jointly objected, saying that Science's retraction standards exceeded the norms of the Committee on Publication Ethics (COPE) and did not fully explain the specific issues in the statement. The journal added that the researchers did not adequately purify the nucleic acid samples before testing for arsenic, but the authors said this issue had been clarified in a 2011 response.
This incident triggered a discussion in the academic community on the standards for retraction. Some experts pointed out that the COPE guidelines allow the withdrawal of manuscripts due to "unreliable conclusions," but the scientific community has long focused on dealing with academic misconduct. The decision by Science may prompt more journals to clean up falsified research, but how to balance rigor and academic controversy remains a difficult problem.