scholarly journals Analysis of an Authentic Historical Italian Cosmetic Talc Sample – Further Evidence for the Lack of Cancer Risk

2017 ◽  
Vol 6 (2) ◽  
pp. 6
Author(s):  
Edward B. Ilgren ◽  
Carlo Sartorio ◽  
John Hoskins
Keyword(s):  
Cancer Risk ◽  
Host Rock ◽  
Mass Concentration ◽  
Epidemiological Studies ◽  
Commercial Products ◽  
North West ◽  
Historical Samples ◽  
Numerical Concentration

Italian talc from the Pinerolo Mines in North West Italy is known for its extreme purity. Several historical investigations of these mines have demonstrated very small amounts of tremolite in the host rock that occasionally found their way into the mined ore. However, more than sixty years of epidemiological studies of the Pinerolo miners and millers have failed to demonstrate any attendant cancer risk and show that this trace tremolite contamination is of no biological significance.Claims made that the Pinerolo Italian cosmetic talc produced prior to 1975 were contaminated with asbestos, principally tremolite, have been difficult to refute given the lack of authentic historical samples of commercial products. We now describe the analytical findings of a recently discovered authentic historical sample.Sample analyses of this material showed only a few non-asbestiform tremolite fibres - a finding discussed in the light of the historical (pre-1975) studies of this talc deposit: no serpentine (chrysotile) or amphibole fibres were detected.The numerical concentration of tremolite fibres in the talc sample was 3.687 x 106 fibres/gram, corresponding to a mass concentration of 0.722 parts per million.

scholarly journals Dietary heterocyclic aromatic amine intake and cancer risk: epidemiological evidence from Japanese studies

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Motoki Iwasaki ◽  
Shoichiro Tsugane
Keyword(s):  
Prostate Cancer ◽  
Cancer Risk ◽  
Colorectal Adenoma ◽  
Dietary Habits ◽  
Daily Intake ◽  
Epidemiological Studies ◽  
Heterocyclic Aromatic Amines ◽  
Cooking Methods ◽  
Case Control Studies ◽  
Significant Positive Association

AbstractHeterocyclic aromatic amines (HAAs), which are formed from the reaction of creatine or creatinine, amino acids, and sugars in meat and fish cooked at high temperatures, have been shown to be mutagenic in bacterial assays and carcinogenic in animal models. Following advances in the dietary assessment of HAA intake in epidemiological studies - including development of a validated meat-cooking module and a specialized food composition database - a number of epidemiological studies have specifically examined the association of HAA intake and cancer risk, most of which were conducted in Western countries. Given that dietary habits and cooking methods differ across countries, however, epidemiological investigation of dietary HAA intake requires a population-specific assessment method. Here, we developed a practical method for assessing dietary HAA intake among Japanese using a food frequency questionnaire (FFQ) and evaluated its validity for use in epidemiological studies by comparison with 2-amino-1-methyl-6-phenylimidazo [4,5-b] pyridine (PhIP) levels in human hair. The Japan Public Health Center-based Prospective Study reported that daily intake of HAAs among Japanese was relatively low, and that more than 50% of total intake in mainland Japan was derived from fish. Only four case-control studies in Japan have been reported so far, for colorectal, stomach and prostate cancer, and colorectal adenoma. A statistically significant positive association was found between 2-amino-3,4-dimethylimidazo [4,5-f] quinoline (MeIQ) and the risk of colorectal adenoma and between individual and total HAAs and the risk of prostate cancer. In contrast, no association was observed for colorectal or stomach cancer, or for colorectal adenoma among men. We also found that the limited and inconsistent findings among epidemiological studies are due to the difficulty in assessing exposure levels of HAAs. In addition to further evidence from prospective cohort studies in Japanese based on dietary HAA intake estimated by FFQs, studies using other methods to assess HAA exposure, such as biomarkers, are highly anticipated.

scholarly journals The association between rs16917496 T/C polymorphism of SET8 gene and cancer risk in Asian populations: a meta-analysis

2018 ◽  
Vol 38 (6) ◽  
Author(s):  
Hui-Xia Wei ◽  
Guo-Xiang Tian ◽  
Ju-Kun Song ◽  
Lian-Jie Yang ◽  
Yu-Pei Wang
Keyword(s):  
Cancer Risk ◽  
Statistical Power ◽  
Genetic Model ◽  
Meta Analysis ◽  
Critical Role ◽  
Epidemiological Studies ◽  
Asian Populations ◽  
Online Databases ◽  
Cancer Types ◽  
Diversity Control

Epidemiological studies have demonstrated close associations between SET8 rs16917496 T/C polymorphism and cancer risk, but the results of published studies were not consistent. We therefore performed this meta-analysis to explore the associations between rs16917496 T/C polymorphism and cancer risk. Five online databases were searched. Odds ratios (ORs) with a 95% confidence interval (CI) were calculated to assess the association between rs16917496 T/C polymorphism and cancer risk. In addition, heterogeneity, accumulative, sensitivity analysis, and publication bias were conducted to check the statistical power. Overall, 13 publications involving 5878 subjects were identified according to included criteria. No significant cancer risk was observed in genetic model of SET8 rs16917496 T/C polymorphism in Asian populations (C vs. T: OR = 1.04, 95%CI = 0.88–1.23, P = 0.63%; TC vs. TT: OR = 1.17, 95%CI = 0.96–1.24, P = 0.11%; CC vs. TT: OR = 0.90, 95%CI = 0.60–1.37, P = 0.63; TC+CC vs. TT: OR = 1.11, 95%CI = 0.90–1.38, P = 0.33; CC vs. TT+TC: OR = 0.92, 95%CI = 0.65–1.30, P = 0.63). Furthermore, similar associations were found in the subgroup analysis of race diversity, control design, genotyping methods, and different cancer types. In summary, our meta-analysis indicated that the SET8 rs16917496 T/C polymorphism may not play a critical role in cancer development in Asian populations.

scholarly journals Circulating Insulin-Like Growth Factor-1 Level and Ovarian Cancer Risk

2016 ◽  
Vol 38 (2) ◽  
pp. 589-597 ◽  
Author(s):  
Yiyang Li ◽  
Yang Li ◽  
Jialing Zhang ◽  
Changjun Zheng ◽  
He Zhu ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Growth Factor ◽  
Cancer Risk ◽  
Confidence Interval ◽  
Odds Ratio ◽  
Meta Analysis ◽  
Epidemiological Studies ◽  
Ovarian Cancer Risk ◽  
Insulin Like Growth Factor ◽  
Summary Odds Ratio

Background/Aims: Insulin-like growth factor-1 (IGF-1) has an important role in cells' proliferation, differentiation and apoptosis, and it may be involved in carcinogenesis. Several epidemiological studies assessed the association between circulating IGF-1 level and ovarian cancer risk, but there was still no conclusive finding. Methods: A meta-analysis of published studies was performed to assess the association between circulating IGF-1 level and ovarian cancer risk. The summary odds ratio (OR) with 95% confidence interval (95%CI) was calculated through meta-analysis to evaluate the strength of the association. Results: Five eligible studies were included into the meta-analysis, which involved a total of 2,028 cases of ovarian cancer and 4,625 controls. Meta-analysis of total 5 studies showed that high circulating IGF-1 level was correlated with decreased risk of ovarian cancer (OR = 0.84, 95%CI 0.74-0.97, P = 0.013). After adjusting for heterogeneity, high circulating IGF-1 level was still correlated with decreased risk of ovarian cancer (OR = 0.83, 95%CI 0.72-0.95, P = 0.007). Subgroup analysis by age showed that circulating IGF-1 level was not correlated with ovarian cancer risk in women both less than 55 years and more than 55 years. However, after adjusting for heterogeneity, high circulating IGF-1 level was correlated with decreased ovarian cancer risk in women less than 55 years (OR = 0.82, 95%CI 0.72-0.94, P = 0.004). Conclusion: Our meta-analysis suggests that high circulating IGF-1 level may be correlated with decreased ovarian cancer risk, especially in women less than 55 years. More studies are needed to further assess the association between circulating IGF-1 level and ovarian cancer risk in the future.

scholarly journals Carcinogens and DNA damage

2018 ◽  
Vol 46 (5) ◽  
pp. 1213-1224 ◽  
Author(s):  
Jessica L. Barnes ◽  
Maria Zubair ◽  
Kaarthik John ◽  
Miriam C. Poirier ◽  
Francis L. Martin
Keyword(s):  
Dna Damage ◽  
Cancer Risk ◽  
Epidemiological Studies ◽  
Heterocyclic Aromatic Amines ◽  
Migrant Populations ◽  
Wide Range ◽  
High Cancer Risk ◽  
Polycyclic Aromatic ◽  
Exogenous Agents ◽  
Cross Links

Humans are variously and continuously exposed to a wide range of different DNA-damaging agents, some of which are classed as carcinogens. DNA damage can arise from exposure to exogenous agents, but damage from endogenous processes is probably far more prevalent. That said, epidemiological studies of migrant populations from regions of low cancer risk to high cancer risk countries point to a role for environmental and/or lifestyle factors playing a pivotal part in cancer aetiology. One might reasonably surmise from this that carcinogens found in our environment or diet are culpable. Exposure to carcinogens is associated with various forms of DNA damage such as single-stand breaks, double-strand breaks, covalently bound chemical DNA adducts, oxidative-induced lesions and DNA–DNA or DNA–protein cross-links. This review predominantly concentrates on DNA damage induced by the following carcinogens: polycyclic aromatic hydrocarbons, heterocyclic aromatic amines, mycotoxins, ultraviolet light, ionising radiation, aristolochic acid, nitrosamines and particulate matter. Additionally, we allude to some of the cancer types where there is molecular epidemiological evidence that these agents are aetiological risk factors. The complex role that carcinogens play in the pathophysiology of cancer development remains obscure, but DNA damage remains pivotal to this process.

Mycotoxin exposure and human cancer risk: A systematic review of epidemiological studies

2020 ◽  
Vol 19 (4) ◽  
pp. 1449-1464 ◽  
Author(s):  
Liesel Claeys ◽  
Chiara Romano ◽  
Karl De Ruyck ◽  
Hayley Wilson ◽  
Beatrice Fervers ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cancer Risk ◽  
Human Cancer ◽  
Epidemiological Studies

DOSIMETRIC AND EPIDEMIOLOGICAL APPROACHES TO RADON LUNG CANCER RISK ASSESSMENT

2019 ◽  
Vol 184 (3-4) ◽  
pp. 285-289
Author(s):  
J P Mc Laughlin
Keyword(s):  
Lung Cancer ◽  
Risk Assessment ◽  
Cancer Risk ◽  
Lung Cancer Risk ◽  
Epidemiological Studies ◽  
Cancer Risk Assessment ◽  
Radon Exposure ◽  
Conversion Factors

Abstract The two principal approaches used to assess the risk of lung cancer due to radon exposure are those based on dosimetric modelling and on epidemiology. Outline accounts are given of the main features of dosimetric models that have evolved over past decades. The main results of some occupational and residential epidemiological studies are also discussed. The doubling of the ICRP radon dose conversion factors estimated using the epidemiological based dose conversion convention in the period 1993–2010 are discussed. Also discussed is the more recent ICRP approach in which it is recommended that in future the doses should be estimated on the basis of dosimetric and biokinetic models thereby treating radon and its progeny as other radionuclides within its system of protection.

scholarly journals Soya and isoflavone intakes associated with reduced risk of oesophageal cancer in north-west China

2014 ◽  
Vol 18 (1) ◽  
pp. 130-134 ◽  
Author(s):  
Li Tang ◽  
Andy H Lee ◽  
Fenglian Xu ◽  
Taotao Zhang ◽  
Jun Lei ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Cancer Risk ◽  
Cancer Patients ◽  
Oesophageal Cancer ◽  
Inverse Association ◽  
Regression Analyses ◽  
West China ◽  
North West ◽  
Soya Milk ◽  
Reduced Risk

AbstractObjectiveTo ascertain the association between soya consumption, isoflavone intakes and oesophageal cancer risk in remote north-west China, where the incidence of oesophageal cancer is known to be high.DesignCase–control study. Information on habitual consumption of soya foods and soya milk was obtained by personal interview. The intakes of isoflavones were then estimated using the US Department of Agriculture nutrient database. Logistic regression analyses were performed to assess the association between soya consumption, isoflavone intakes and oesophageal cancer risk.SettingUrumqi and Shihezi, Xinjiang Uyghur Autonomous Region, China.SubjectsParticipants were 359 incident oesophageal cancer patients and 380 hospital-based controls.ResultsThe oesophageal cancer patients consumed significantly less (P < 0·001) total soya foods (mean 57·2 (sd 119·0) g/d) and soya milk (mean 18·8 (sd 51·7) ml/d) than the controls (mean 93·3 (sd 121·5) g/d and mean 35·7 (sd 73·0) ml/d). Logistic regression analyses showed an inverse association between intake of soya products and the risk of oesophageal cancer. The adjusted odds were OR = 0·33 (95 % CI 0·22, 0·49) and OR = 0·48 (95 % CI 0·31, 0·74) for consuming at least 97 g of soya foods and 60 ml of soya milk daily (the highest tertiles of consumption), respectively, relative to the lowest tertiles of consumption. Similarly, inverse associations with apparent dose–response relationships were found between isoflavone intakes and oesophageal cancer risk.ConclusionsHabitual consumption of soya products appears to be associated with reduced risk of oesophageal cancer in north-west China.

Adipose tissue, obesity and adipokines: role in cancer promotion

2015 ◽  
Vol 21 (1) ◽  
Author(s):  
Andrea Booth ◽  
Aaron Magnuson ◽  
Josephine Fouts ◽  
Michelle Foster
Keyword(s):  
Adipose Tissue ◽  
Cancer Risk ◽  
Cancer Progression ◽  
Cancer Metastasis ◽  
Epidemiological Studies ◽  
Normal Weight ◽  
Cell Progression ◽  
High Cancer Risk ◽  
Apoptosis Pathways ◽  
And Migration

AbstractAdipose tissue is a complex organ with endocrine, metabolic and immune regulatory roles. Adipose depots have been characterized to release several adipocytokines that work locally in an autocrine and paracrine fashion or peripherally in an endocrine fashion. Adipocyte hypertrophy and excessive adipose tissue accumulation, as occurs during obesity, dysregulates the microenvironment within adipose depots and systemically alters peripheral tissue metabolism. The term “adiposopathy” is used to describe this promotion of pathogenic adipocytes and associated adipose – elated disorders. Numerous epidemiological studies confirm an association between obesity and various cancer forms. Proposed mechanisms that link obesity/adiposity to high cancer risk and mortality include, but are not limited to, obesity-related insulin resistance, hyperinsulinemia, sustained hyperglycemia, glucose intolerance, oxidative stress, inflammation and/or adipocktokine production. Several epidemiological studies have demonstrated a relationship between specific circulating adipocytokines and cancer risk. The aim of this review is to define the function, in normal weight and obesity states, of well-characterized and novel adipokines including leptin, adiponectin, apelin, visfatin, resistin, chemerin, omentin, nesfatin and vaspin and summarize the data that relates their dysfunction, whether associated or direct effects, to specific cancer outcomes. Overall research suggests most adipokines promote cancer cell progression via enhancement of cell proliferation and migration, inflammation and anti-apoptosis pathways, which subsequently can prompt cancer metastasis. Further research and longitudinal studies are needed to define the specific independent and additive roles of adipokines in cancer progression and reoccurrence.

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