{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T14:39:27Z","timestamp":1789655967845,"version":"4.0.1"},"reference-count":100,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,2,9]],"date-time":"2025-02-09T00:00:00Z","timestamp":1739059200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Toxins"],"abstract":"<jats:p>The Qidong Liver Cancer Institute (QDLCI) and the Qidong Cancer Registry were established in 1972 with input from doctors, other medical practitioners, and non-medical investigators arriving from urban centers such as Shanghai and Nanjing. Medical teams were established to quantify the extent of primary liver cancer in Qidong, a corn-growing peninsula on the north side of the Yangtze River. High rates of liver cancer were documented and linked to several etiologic agents, including aflatoxins. Local corn, the primary dietary staple, was found to be consistently contaminated with high levels of aflatoxins, and bioassays using this corn established its carcinogenicity in ducks and rats. Observational studies noted a positive association between levels of aflatoxin in corn and incidence of liver cancer across townships. Biomarker studies measuring aflatoxin B1 and its metabolite aflatoxin M1 in biofluids reflected the exposures. Approaches to decontamination of corn from aflatoxins were also studied. In 1993, investigators from Johns Hopkins University were invited to visit the QDLCI to discuss chemoprevention studies in some townships. A series of placebo-controlled clinical trials were conducted using oltipraz (a repurposed drug), chlorophyllin (an over-the-counter drug), and beverages prepared from 3-day-old broccoli sprouts (rich in the precursor phytochemical for sulforaphane). Modulation of biomarkers of aflatoxin DNA and albumin adducts established proof of principle for the efficacy of these agents in enhancing aflatoxin detoxication. Serendipitously, by 2012, aflatoxin exposures quantified using biomarker measurements documented a many hundred-fold reduction. In turn, the Cancer Registry documents that the age-standardized incidence rate of liver cancer is now 75% lower than that seen in the 1970s. This reduction is seen in Qidongese who have never received the hepatitis B vaccination. Aflatoxin mitigation driven by economic changes switched the dietary staple of contaminated corn to rice coupled with subsequent dietary diversity leading to lower aflatoxin exposures. This 50-year effort to understand the etiology of liver cancer in Qidong provides the strongest evidence for aflatoxin mitigation as a public health strategy for reducing liver cancer burden in exposed, high-risk populations. Also highlighted are the challenges and successes of international team science to solve pressing public health issues.<\/jats:p>","DOI":"10.3390\/toxins17020079","type":"journal-article","created":{"date-parts":[[2025,2,12]],"date-time":"2025-02-12T11:08:51Z","timestamp":1739358531000},"page":"79","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Fifty Years of Aflatoxin Research in Qidong, China: A Celebration of Team Science to Improve Public Health"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4102-8934","authenticated-orcid":false,"given":"Jian-Guo","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Epidemiology, Qidong Liver Cancer Institute, Qidong People\u2019s Hospital, Affiliated Qidong Hospital of Nantong University, Qidong 226200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuan-Rong","family":"Zhu","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Qidong Liver Cancer Institute, Qidong People\u2019s Hospital, Affiliated Qidong Hospital of Nantong University, Qidong 226200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Geng-Sun","family":"Qian","sequence":"additional","affiliation":[{"name":"Shanghai Cancer Institute, Shanghai Jiaotong University, Shanghai 200032, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin-Bing","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Qidong Liver Cancer Institute, Qidong People\u2019s Hospital, Affiliated Qidong Hospital of Nantong University, Qidong 226200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian-Hua","family":"Lu","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Qidong Liver Cancer Institute, Qidong People\u2019s Hospital, Affiliated Qidong Hospital of Nantong University, Qidong 226200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6676-261X","authenticated-orcid":false,"given":"Thomas W.","family":"Kensler","sequence":"additional","affiliation":[{"name":"Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1722-6826","authenticated-orcid":false,"given":"Lisa P.","family":"Jacobson","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alvaro","family":"Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John D.","family":"Groopman","sequence":"additional","affiliation":[{"name":"Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,2,9]]},"reference":[{"key":"ref_1","unstructured":"(2024, December 27). 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