Mongolia: Failure of Total Banning of Asbestos.

The primary uses of asbestos in Mongolia are in thermal power plants, construction and at railway companies. There is, however, limited data on both asbestos consumption and asbestos related disease (ARD) in Mongolia. The purpose of this paper is to report on the failure to completely ban asbestos in Mongolia. To write this paper, available asbestos related literature, published nationally and internationally, and legal regulations, national standards and guidelines on asbestos control were reviewed. Mongolia consumed a total of 44,421.9 metric tons of asbestos containing materials (AMCs) between 1996 and 2014. As a key indicator of ARD, 54 cases of mesothelioma were diagnosed at the National Cancer Center by pathological testing of tissue samples between 1994 and 2013. In 2010, The government made the decision to stop all types of asbestos use under the Law on Toxic and Hazardous Substances. However, there was no nationwide action plan to gradually reduce asbestos use, promote substitutes and raise awareness of health hazards and economic burdens in the future from asbestos use. There was also no planning for safe removal of asbestos currently in place. After the banning of asbestos, thermal power plants told the government that they could not produce electricity without insulation of AMCs and substitution materials were economically not feasible. Due to pressure from the energy sector and inadequate awareness of asbestos hazards, the government changed the legal status on asbestos in 2011 as a restricted chemical. Asbestos is still allowed to be used, and workers and the general community are still unnecessarily exposed to this carcinogen.

Inflammation as a chemoprevention target in asbestos-induced malignant mesothelioma.

Malignant mesothelioma (MM) is an incurable cancer of the serosal lining that is often caused by exposure to asbestos. Therefore, novel agents for the prevention and treatment of this disease are urgently needed. Asbestos induces the release of pro-inflammatory cytokines such as IL-1ß and IL-6, which play a role in MM development. IL-6 is a component of the JAK-STAT3 pathway that contributes to inflammation-associated tumorigenesis. Glycoprotein 130 (gp130), the signal transducer of this signaling axis, is an attractive drug target because of its role in promoting neoplasia via the activation of downstream STAT3 signaling. The anticancer drug, SC144, inhibits the interaction of gp130 with the IL-6 receptor (IL6R), effectively blunting signaling from this inflammatory axis. To test whether the inflammation-related release of IL-6 plays a role in the formation of MM, we evaluated the ability of SC144 to inhibit asbestos-induced carcinogenesis in a mouse model. The ability of sulindac and anakinra, an IL6R antagonist/positive control, to inhibit MM formation in this model was tested in parallel. Asbestos-exposed Nf2+/-;Cdkn2a+/- mice treated with SC144, sulindac or anakinra showed significantly prolonged survival compared to asbestos-exposed vehicle-treated mice. STAT3 activity was markedly decreased in MM specimens from SC144-treated mice. Furthermore, SC144 inhibited STAT3 activation by IL-6 in cultured normal mesothelial cells, and in vitro treatment of MM cells with SC144 markedly decreased the expression of STAT3 target genes. The emerging availability of newer, more potent SC144 analogs showing improved pharmacokinetic properties holds promise for future trials, benefitting individuals at high risk of this disease.

Use of the Minimum Basic Data Set as a tool for the epidemiological surveillance of mesothelioma / Uso del Conjunto Mínimo Básico de Datos (CMBD), como instrumentode vigilancia epidemológica del mesotelioma

Background:Mesothelioma is a very aggressive tumor that appears after several decades of asbestos exposure. The Minimum Basic Data Set (MBDS) has been validated for the incidence of mesothelioma in Italy, but not in Spain. The objectives of this investigation are: to estimate the prevalence, incidence and mortality of mesothelioma in the Community of Madrid (CM); to evaluate the distribution of this risk within the territory; and to explore validity of the MBDS in the epidemiological surveillance of mesothelioma. Methods:Prevalence, incidence and mortality mesothelioma rates were calculated for the CM from data of the MBDS (2016 and 2017), and mortality data of the Spanish National Statistics Institute (INE) for the same period. The geographical distribution of cases and deaths, and its correlation at municipal level was studied. Statistical analysis with R and Excel tools was carried out.Results:The incidence of mesothelioma in the CM was higher than in previous years. Mortality estimated by the MBDS and calculated using INE data for 2016 were similar in the CM. The correlation between the geographical patterns of risk of mesothelioma obtained from the two sources was high (r = 0.86). The aggregation of cases continues in municipalities in the south, detecting the maximum risk in Aranjuez. Conclusion:The MBDS and INE are good resources for monitoring the risk of mesothelioma. New studies that investigate the aggregation of cases in Aranjuez are required.(AU)

Fundamento: El mesotelioma es un tumor muy agresivo que surge tras varias décadas de exposición al amianto. El Conjunto Mínimo Básico de Datos (CMBD), ha sido validado para conocer la incidencia del mesotelioma en Italia, pero no en España. El objetivo de este trabajo es conocer la prevalencia, incidencia y mortalidad por mesotelioma en la Comunidad de Madrid (CM), evaluar la distribución del riesgo dentro de su territorio y explorar la validez del CMBD en la vigilancia epidemiológica del mesotelioma en España. Material y métodos: Se han utilizado los datos del CMBD de la CM con diagnóstico de mesotelioma y las causas de muerte registradas en el Instituto Nacional de Estadística (INE), durante el periodo 2016-2017. Los cálculos de tasas ajustadas, de distribución geográfica de casos y fallecidos, y de correlación del patrón geográfico a nivel municipal entre ambas fuentes (CMBD eINE), se realizaron mediante los programas R y Excel. Resultados: La incidencia del mesotelioma en la CM fue más alta en 2016 y 2017 que en años precedentes. La mortalidad calculada (INE) y la estimada (CMBD) fueron similares. La correlación entre patrones geográficosde riesgo obtenidos mediante CMBD e INE fue elevada (r = 0.86). La agregación de casos continúa concentrándose en los municipios del sur de la CM, detectándoseel máximo riesgo en Aranjuez. Conclusiones: Tanto el CMBD como el INE representan fuentes adecuadas para monitorizar el riesgo de mesotelioma. Se precisa de nuevos estudios que expliquen laagregación de casos detectada en Aranjuez.(AU)

Asbestos: Mesothelioma / Mesotelioma

Since 2006, The Mesothelioma Center at Asbestos.com has been helping connect people impacted by mesothelioma and asbestos exposure with reliable information, world-class treatment. ----------------------------------------------------------- Desde 2006, o Mesothelioma Center em Asbestos.com tem ajudado a conectar as pessoas afetadas pelo mesotelioma e exposição ao amianto com informações confiáveis e tratamento.

[Programs for Asbestos Abatement. Lessons from Poland]. / Programas de eliminación del Amianto. Lecciones desde Polonia.

The commercialization of asbestos in Europe in the second half of the 20th century translated into consumption of millions of tons of this material. Occupational exposure to asbestos is controlled under the 2009 European Union Directive. Currently, through epidemiological surveillance and pathology registries (mainly mesotheliomas), it is possible to record past exposures. Despite prohibiting its use, large amounts of asbestos remain in buildings, infrastructures and vehicles, among others. The road to elimination of existing asbestos began with a 2013 European Parliament Resolution and the Opinion of the European Economic and Social Committee (2015 / C 251/03).To better understand barriers to implementing these plans, we reviewed the experience in Poland the only country that to date has implemented an action plan with great financial support, together with actions carried out in Spain generally, and Navarre specifically, given the latter's exhaustive registry of exposed workers.The enormous economic effort required to implement these plans, along with the environmental risks associated with asbestos abatement, require detailed planning, which should consider understanding why the objectives set by Poland, a benchmark country, have not been achieved to date.

La exposición laboral se ha controlado a partir de la Directiva de 2009 y, en la actualidad, mediante vigilancia epidemiológica, se registran las patologías, mesoteliomas fundamentalmente, por exposiciones pasadas.  Después de prohibida su utilización, aún permanecen cantidades ingentes en edificios, infraestructuras y vehículos, entre otros. Con el objetivo de conocer las dificultades de estos planes se ha revisado el de Polonia, único país que hasta la fecha, ha implementado un plan de acción con un gran respaldo financiero y las actuaciones llevadas a cabo en relación con la exposición a amianto en España y, Navarra en concreto por contar con un registro exhaustivo de trabajadores expuestos.  El enorme esfuerzo económico que precisan estos planes y los riesgos medioambientales que suponen, merecen una precisa planificación, que exige conocer el no alcance hasta la fecha actual de los objetivos planteados en Polonia, país referente.

Epidemiological research as a driver of prevention: the Sibaté study. Commentary.

Although asbestos exposure and risks can be prevented, only five countries in Latin America have banned asbestos, including Colombia. Beginning in 2011, a collaboration between the Istituto Superiore di Sanità in Italy and Universidad de los Andes in Colombia was established, bringing together relevant expertise aiming to improve our understanding of the asbestos problem. An important result of this collaboration was a recently published study conducted in Sibaté, Colombia, a municipality where an asbestos-cement facility has operated since 1942. The evidence collected suggests the presence of a mesothelioma cluster in Sibaté. Landfilled zones with an underground layer of friable asbestos were also discovered in the urban area of the municipality. The importance of this type of collaboration can go beyond understanding the impact of asbestos at the local level, which is crucial, and may also contribute in solving unanswered questions of the problem in countries that banned asbestos decades ago.

[Asbestos in drinking water and hazards to human health: a narrative synthesis]. / L'amianto nell'acqua potabile e i pericoli per la salute umana: una sintesi narrativa.

The term asbestos refers to six unique fibrous minerals mostly used in the production of asbestos cement sheets and pipes. According to the World Health Organization and the International Agency for Research on Cancer (IARC), there exists at least "sufficient evidence" that all types of asbestos may cause cancer in humans (mesothelioma, lung cancer, laryngeal tumor and ovarian cancer). The only asbestos limit in drinking water is 7 million fiber/liter. This study is a narrative synthesis about the possible hazards to human health related to the presence of asbestos in drinking water. The various scientific studies and epidemiological reports examined highlight that there is an ongoing debate on the possible carcinogenic risk associated with asbestos exposure through ingestion. Nevertheless, considering the latency with which diseases caused by asbestos may emerge, control measures should be adopted.

Asbestos neglect: Why asbestos exposure deserves greater policy attention.

While many public health threats are now widely appreciated by the public, the risks from asbestos exposure remain poorly understood, even in high-risk groups. This article makes the case that asbestos exposure is an important, ongoing global health threat, and argues for greater policy efforts to raise awareness of this threat. It also proposes the extension of asbestos bans to developing countries and increased public subsidies for asbestos testing and abatement.

Global Asbestos Disaster.

Introduction: Asbestos has been used for thousands of years but only at a large industrial scale for about 100⁻150 years. The first identified disease was asbestosis, a type of incurable pneumoconiosis caused by asbestos dust and fibres. The latest estimate of global number of asbestosis deaths from the Global Burden of Disease estimate 2016 is 3495. Asbestos-caused cancer was identified in the late 1930's but despite today's overwhelming evidence of the strong carcinogenicity of all asbestos types, including chrysotile, it is still widely used globally. Various estimates have been made over time including those of World Health Organization and International Labour Organization: 107,000⁻112,000 deaths. Present estimates are much higher. Objective: This article summarizes the special edition of this Journal related to asbestos and key aspects of the past and present of the asbestos problem globally. The objective is to collect and provide the latest evidence of the magnitude of asbestos-related diseases and to provide the present best data for revitalizing the International Labor Organization/World Health Organization Joint Program on Asbestos-related Diseases. Methods: Documentation on asbestos-related diseases, their recognition, reporting, compensation and prevention efforts were examined, in particular from the regulatory and prevention point of view. Estimated global numbers of incidence and mortality of asbestos-related diseases were examined. Results: Asbestos causes an estimated 255,000 deaths (243,223⁻260,029) annually according to latest knowledge, of which work-related exposures are responsible for 233,000 deaths (222,322⁻242,802). In the European Union, United States of America and in other high income economies (World Health Organization regional classification) the direct costs for sickness, early retirement and death, including production losses, have been estimated to be very high; in the Western European countries and European Union, and equivalent of 0.70% of the Gross Domestic Product or 114 × 108 United States Dollars. Intangible costs could be much higher. When applying the Value of Statistical Life of 4 million EUR per cancer death used by the European Commission, we arrived at 410 × 108 United States Dollars loss related to occupational cancer and 340 × 108 related to asbestos exposure at work, while the human suffering and loss of life is impossible to quantify. The numbers and costs are increasing practically in every country and region in the world. Asbestos has been banned in 55 countries but is used widely today; some 2,030,000 tons consumed annually according to the latest available consumption data. Every 20 tons of asbestos produced and consumed kills a person somewhere in the world. Buying 1 kg of asbestos powder, e.g., in Asia, costs 0.38 United States Dollars, and 20 tons would cost in such retail market 7600 United States Dollars. Conclusions: Present efforts to eliminate this man-made problem, in fact an epidemiological disaster, and preventing exposures leading to it are insufficient in most countries in the world. Applying programs and policies, such as those for the elimination of all kind of asbestos use-that is banning of new asbestos use and tight control and management of existing structures containing asbestos-need revision and resources. The International Labor Organization/World Health Organization Joint Program for the Elimination of Asbestos-Related Diseases needs to be revitalized. Exposure limits do not protect properly against cancer but for asbestos removal and equivalent exposure elimination work, we propose a limit value of 1000 fibres/m³.

Current Management and Future Opportunities for Peritoneal Metastases: Peritoneal Mesothelioma.

PURPOSE: Diffuse malignant peritoneal mesothelioma (MPM) is a rare and ultimately fatal cancer that was first described just over a century ago. It is a diffuse malignancy arising from the mesothelial lining of the peritoneum; morbidity and mortality from MPM is due to its propensity to progress locoregionally within the abdominal cavity. METHODS: The purpose of this article is to review the current state-of-the-science related to the diagnosis, staging, and treatment of MPM. RESULTS: The condition afflicts men and women equally and the peak incidence is between 55 and 60 years of age although it can arise in the young and elderly. Patients afflicted with MPM most commonly present with nonspecific abdominal symptoms that usually lead to diagnosis when the condition is relatively advanced. Historically, median overall survival for MPM patients without treatment is < 1 year. The couplet of systemic pemetrexed and cisplatin has an overall response rate of approximately 25% and a median overall survival of approximately 1 year. CONCLUSION: The available data, almost all retrospective in nature, have shown that in selected patients, operative cytoreduction (CRS) and regional chemotherapy administered as hyperthermic intraoperative peritoneal chemotherapy (HIPEC) or early postoperative intraperitoneal chemotherapy (EPIC) is associated with long-term survival. Studies on the molecular biology of MPM have yielded new insights relating to the potentially important role of the phosphoinsitide-3-kinase/mammalian target of rapamycin (PI3 K/mTOR) pathways and immune checkpoint inhibitors that may translate into new therapeutic options for patients with diffuse MPM.

Phlebotomy as a preventive measure for crocidolite-induced mesothelioma in male rats.

Malignant mesothelioma (MM) is a rare but socially important neoplasm due to its association with asbestos exposure. Malignant mesothelioma is difficult to diagnose at an early stage, yet there are no particularly effective treatments available at the advanced stage, thus necessitating efficient strategies to prevent MM in individuals already exposed to asbestos. We previously showed that persistent oxidative damage caused by foreign body reaction and affinity of asbestos both to hemoglobin and histones is one of the major pathogeneses. Accordingly, as an effective strategy to prevent asbestos-induced MM, we undertook the use of an iron chelator, deferasirox, which decreased the epithelial-mesenchymal transition in a crocidolite-induced rat MM model. However, this agent may show adverse effects. Here, we studied the effects of iron removal by phlebotomy as a realistic measure on the same rat model. We injected a total of 5 mg crocidolite i.p. to F1 hybrid rats between the Fischer-344 and Brown-Norway strains at the age of 6 weeks. We repeated weekly or biweekly phlebotomy of 6-8 mL/kg/time from 10 to 60 weeks of age. The animals were observed until 120 weeks. In male rats, phlebotomy significantly decreased the weight and nuclear grade of MM, and modestly reduced the associated ascites and the fraction of more malignant sarcomatoid subtype. Weekly phlebotomy prolonged long-term survival. Our results indicate that appropriate phlebotomy may be a practical preventive measure to attenuate the initiation and promotion capacity of asbestos towards MM by reducing iron in individuals exposed to asbestos.

HMGB1 targeting by ethyl pyruvate suppresses malignant phenotype of human mesothelioma.

Human malignant mesothelioma (MM) is an aggressive cancer linked to asbestos and erionite exposure. We previously reported that High-Mobility Group Box-1 protein (HMGB1), a prototypic damage-associated molecular pattern, drives MM development and sustains MM progression. Moreover, we demonstrated that targeting HMGB1 inhibited MM cell growth and motility in vitro, reduced tumor growth in vivo, and prolonged survival of MM-bearing mice. Ethyl pyruvate (EP), the ethyl ester of pyruvic acid, has been shown to be an effective HMGB1 inhibitor in inflammation-related diseases and several cancers. Here, we studied the effect of EP on the malignant phenotype of MM cells in tissue culture and on tumor growth in vivo using an orthotopic MM xenograft model. We found that EP impairs HMGB1 secretion by MM cells leading to reduced RAGE expression and NF-κB activation. As a consequence, EP impaired cell motility, cell proliferation, and anchorage-independent growth of MM cells. Moreover, EP reduced HMGB1 serum levels in mice and inhibited the growth of MM xenografts.Our results indicate that EP effectively hampers the malignant phenotype of MM, offering a novel potential therapeutic approach to patients afflicted with this dismal disease.

[Possible health risks from asbestos in drinking water]. / Rischio clinico da ingestione di fibre di amianto in acqua potabile.

The recent finding of asbestos fibres in drinking water (up to 700.000 fibres/litres) in Tuscany (Central Italy) leads to concerns about health risks in exposed communities. Exposure to asbestos has been linked with cancer at several levels of the gastrointestinal tract, and it has been documented, in an animal model, a direct cytotoxic effect of asbestos fibres on the ileum. It has been recently described a possible link between asbestos and intrahepatic cholangiocarcinoma, and asbestos fibres have been detected in humans in histological samples from colon cancer and in gallbladder bile. Taken together, these findings suggest the possibility of an enterohepatic translocation of asbestos fibres, alternative to lymphatic translocation from lungs. In animal models, asbestos fibres ingested with drinking water act as a co-carcinogen in the presence of benzo(a) pyrene and, according to the International Agency for Research on Cancer (IARC ), there is evidence pointing to a causal effect of ingested asbestos on gastric and colorectal cancer. The risk seems to be proportional to the concentration of ingested fibres, to the extent of individual water consumption, to exposure timing, and to the possible exposure to other toxics (i.e., benzo(a)pyrene). Furthermore, the exposure to asbestos by ingestion could explain the epidemiological finding of mesothelioma in subjects certainly unexposed by inhalation. In conclusion, several findings suggest that health risks from asbestos could not exclusively derive from inhalation of fibres. Health hazards might also be present after ingestion, mainly after daily ingestion of drinking water for long periods. In Italy, a systemic assessment of the presence of asbestos fibres in drinking water is still lacking, although asbestos-coated pipelines are widely diffused and still operating. Despite the fact that the existence of a threshold level for health risks linked to the presence of asbestos in drinking water is still under debate, the precautionary principle should impose all possible efforts in order to revise health policies concerning this topic, and a systematic monitoring of drinking water to quantify the presence of asbestos is certainly needed in all regions. Further epidemiological studies aimed to the identification of exposed communities and to an adequate health risk assessment in their specific geographical areas are urgently needed.

[National epidemiological surveillance systems of mesothelioma cases]. / I sistemi nazionali di sorveglianza dei casi di mesotelioma.

INTRODUZIONE: sebbene la relazione causale tra esposizione ad amianto e malattie neoplastiche sia ben nota, in molti Paesi il consumo del materiale è ancora rilevante e crescente. A causa della lunga latenza, nei Paesi dove è stato bandito (come in Italia) è oggi in corso un'epidemia di malattie correlate ad amianto. OBIETTIVI: descrivere i sistemi di sorveglianza dei mesoteliomi attivi nel mondo mediante un'analisi comparativa. METODI: è stata condotta una revisione bibliografica della letteratura disponibile sui sistemi di sorveglianza epidemiologica dei mesoteliomi attivi nel mondo, comparando metodi e risultati disponibili. RISULTATI: sistemi di ricerca dei casi incidenti e di analisi anamnestica dei soggetti ammalati sono attivi solo in Italia, Francia e Corea del Sud. I Paesi presso i quali sono attivi sistemi di rilevazione e controllo dei casi incidenti di mesotelioma sono quelli in cui vige il bando dell'amianto e che hanno sperimentato consumi rilevanti in passato. Non sono stati istituiti sistemi epidemiologici di sorveglianza in molti Paesi dove il consumo di amianto è ancora importante (inclusi Russia, Cina, India e Brasile). CONCLUSIONI: si conferma l'importanza dei sistemi di sorveglianza epidemiologica dei mesoteliomi per la sanità pubblica, il sostegno alle politiche di welfare e la prevenzione dei rischi. Lo sviluppo di progetti per tendere a una maggiore uniformità nei metodi di ricerca dei casi, di classificazione delle diagnosi e dell'esposizione e nelle tecniche di analisi dei dati potrebbe consentire una maggiore fruibilità dei dati aggregati. La disponibilità di dati internazionali confrontabili può essere di stimolo all'adozione di provvedimenti di bando internazionale.