Publications by authors named "Frederique Rachedi"

Article Synopsis
  • - French Polynesia (FP) has a high incidence of differentiated thyroid cancer (DTC), and this study examined the genetic factors contributing to DTC risk in the native population, particularly due to past nuclear tests from 1966-1974.
  • - Researchers analyzed over 300,000 single nucleotide polymorphisms (SNPs) in 283 DTC cases and 418 controls, discovering genetic links associated with DTC at three specific regions on chromosomes 6, 10, and 17, indicating an increased risk.
  • - The findings suggest that these genetic loci could influence DTC risk, but the study recommends further investigation using whole genome sequencing to better understand these factors, as the current methods may not fully capture the
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Importance: Due to the amount of iodine 131 released in nuclear tests and its active uptake by the thyroid, differentiated thyroid carcinoma (DTC) is the most serious health risk for the population living near sites of nuclear tests. Whether low doses to the thyroid from nuclear fallout are associated with increased risk of thyroid cancer remains a controversial issue in medicine and public health, and a misunderstanding of this issue may be associated with overdiagnosis of DTCs.

Design, Setting, And Participants: This case-control study was conducted by extending a case-control study published in 2010 that included DTCs diagnosed between 1984 and 2003 by adding DTCs diagnosed between 2004 and 2016 and improving the dose assessment methodology.

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Article Synopsis
  • Variants found in previous genome-wide association studies (GWAS) for differentiated thyroid carcinoma (DTC) account for only 10% of the genetic risk, highlighting the need for deeper investigation into the biological mechanisms behind DTC susceptibility.
  • By analyzing data from the EPITHYR consortium and The Cancer Genome Atlas, researchers uncovered eight genes linked to DTC and determined that these genes are associated with important metabolic and signaling pathways.
  • The study suggests a significant connection between DTC risk and pathways involved in cholesterol metabolism, steroid biosynthesis, and muscle contraction processes, providing new insights into how these mechanisms may contribute to DTC susceptibility.
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Differentiated thyroid carcinoma (DTC) incidence is characterized by wide ethnic and geographic variations, with high incidence rates observed in Oceanian populations. Genome-wide association studies (GWAS) identified mainly four DTC susceptibility loci at 9q22.33, 14q13.

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Incidence of differentiated thyroid carcinoma (DTC) varies considerably between ethnic groups, with particularly high incidence rates in Pacific Islanders. DTC is one of the cancers with the highest familial risk suggesting a major role of genetic risk factors, but only few susceptibility loci were identified so far. In order to assess the contribution of known DTC susceptibility loci and to identify new ones, we conducted a multiethnic genome-wide association study (GWAS) in individuals of European ancestry and of Oceanian ancestry from Pacific Islands.

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Article Synopsis
  • French Polynesia has the highest thyroid cancer incidence and mortality rates globally, potentially linked to high levels of non-essential trace elements (nETE) like mercury, lead, arsenic, and cadmium found in foods.
  • The study involved 229 cases and 373 controls, analyzing food contamination and correlating it with nETE levels in fingernails among Polynesian participants.
  • Results indicate that while lead and mercury were common pollutants in food and fingernail clippings, dietary exposure to nETE did not directly correlate with an increased risk of differentiated thyroid cancer, although certain factors like family cancer history influenced risks related to lead and arsenic intake.
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Background: French Polynesia has one of the highest incidence rates of thyroid cancer worldwide. Relationships with the atmospheric nuclear weapons tests and other environmental, biological, or behavioral factors have already been reported, but genetic susceptibility has yet to be investigated. We assessed the contribution of polymorphisms at the 9q22.

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Background: Numerous studies have suggested that selenium deficiency may be associated with an increased risk for several types of cancer, but few have focused on thyroid cancer.

Materials And Methods: We examined the association between post-diagnostic fingernail selenium levels and differentiated thyroid cancer risk in a French Polynesian matched case-control study. Conditional logistic regression models were used to estimate odds ratios and 95% confidence intervals.

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Background: To investigate differentiated thyroid cancer risk factors in natives of French Polynesia is of interest because of the very high incidence of this cancer in the archipelago.

Materials And Methods: To assess the role of various potential risk factors of thyroid cancer in the natives of French Polynesia we performed a case-control study. The study included almost all the French Polynesians diagnosed with differentiated thyroid carcinoma between 1981 and 2003 (n=229) and 373 French Polynesian control individuals from the general population without cancer.

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French Polynesia has one of the world's highest thyroid cancer incidence rates. A case-control study among native residents of French Polynesia included 229 cases of differentiated thyroid cancer diagnosed between 1979 and 2004, and 371 population controls. Dietary patterns and goitrogenic food consumption (cabbage, cassava) were analyzed.

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Background: French Polynesia has one of the world's highest thyroid cancer incidence rates. Iodine is suspected to play a role in this high incidence. The objective of this study was to assess whether low dietary iodine is related to a higher risk of thyroid cancer in the French Polynesian population.

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Background: Differentiated thyroid carcinoma is considered to be the nonhereditary cancer for which familial inheritance is the highest. To date, no familial aggregation analysis of this cancer has been performed in Maohi populations, which exhibit a very high incidence rate. Therefore, we evaluate the risk of differentiated thyroid cancer associated with a family history of thyroid cancer in natives of French Polynesia.

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Objectives: French Polynesia has one of the world's highest thyroid cancer incidence rates. A case-control study among native residents of French Polynesia included 219 cases of differentiated thyroid cancers diagnosed between 1979 and 2004 (195 women/24 men) matched with 359 population controls (315 women/44 men) on the date of birth.

Methods: Anthropometric factors were analyzed by conditional logistic regression.

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French Polynesia has one of the world's highest incidence rates of thyroid cancer. A case-control study among native residents of French Polynesia included 201 women diagnosed with differentiated thyroid cancer before the age of 56 years, between 1981 and 2004, matched to 324 population controls on date of birth. Face-to-face interviews were conducted from 2002 to 2004.

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