Radiation exposure and bell�s palsy: A hypothetical association

Bell�s palsy is an idiopathic peripheral nerve palsy involving the facial nerve. It accounts for 60 to 75 of all cases of unilateral facial paralysis. The main mechanisms to induce BP remain unclear, but infection, ischemic condition and immunodeficiency may contribute to the development of Bell�s palsy. Accumulating evidence has shown several factors can trigger the reactivation of latent HSV including psychological stressors, physical stressors and immunosuppression. Ionization and non-ionization radiations are of importance of physical stressors. Some data have shown radiation can reactivate HSVs. Based on preliminary studies showing radiation reactivation of HSVs, we aimed to hypothesize radiation (in both forms of ionization and non-ion-ization) may cause Bell�s palsy. In the future, the role of radiotherapy, radiofrequency radiation from mobile phones and wireless devices in HSV reactivation and Bell�s palsy should be investigated. © 2018, Shiraz University of Medical Sciences. All rights reserved

Trends in cervical cancer incidence in Iran from 2003 to 2009

Background: Cancer is the second leading cause of death worldwide and the third in Iran. Among cancers, cervical cancer is the third leading cause of death in women. Thus, recognizing the epidemiology and trends of cervical cancer can be effective for planning and policy-making. This study aims to investigate the incidence and trends of cervical cancer in Iran due to the few studies that have addressed this issue and the unclear trend for cervical cancer in Iran. Methods: This study re-analyzed existing data from the cancer data recording system in Iran during years 2003 to 2009. We used available data from the National Cancer Registry and Center for Disease Control of the Ministry of Health, Treatment and Medical Education. Stata software (version 11) was used for data analysis and the significance of the incidence trend diagram was derived with WINPEPI software. Results: Assessment of the National Cancer Registry statistics from 2003 to 2009 showed an increased trend in cervical cancer from 2003 to 2008 and a decreased trend from 2008 to 2009. During this period, there were 4273 cases of cervical cancer registered. From these, 394 cases were registered in 2003 which peaked at 907 cases in 2009. The registered cancer cases had an approximately 3-fold increase during this period. Most provinces reported an increased trend of incidence in cervical cancer. Conclusion: Based on the results of this study, the incidence of cervical cancer is increasing in Iran, especially in the central regions of the country. Therefore, considering the growing trend of cancer, we recommend early detection through screening programs, public awareness, and public training programs that particularly target high risk populations. © 2018, Shiraz University of Medical Sciences. All rights reserved

Application of the world health organization quality of life instrument, short form (WHOQOL-BREF) to patients with endometriosis

Objective Endometriosis, a common hormone-dependent chronic inflammatory disease causes various symptoms including pelvic pain, which affect the physical and psychological quality of life in women of reproductive age. The present study aimed to assess the quality of life of Iranian women with endometriosis using the World Health Organization Quality of Life Instrument, Short Form (WHOQOL-BREF) questionnaire. Methods This cross-sectional study performed in Tehran between October 2014 and July 2016 included 70 Iranian women with endometriosis. The Iranian version of the WHOQOL-BREF questionnaire was used to measure quality of life in these women. The Pearson's correlation coefficient, the paired and the independent t-tests, and a linear regression model were used to statistically analyze the data using the SPSS software version 16.0. Results The total mean score of the WHOQOL-BREF questionnaire was 80.58. The highest and the lowest mean scores were observed in the environmental (28.15) and the physical health domains (10.59), respectively. A multiple linear regression model (backward method) showed that insurance coverage was associated with the total WHOQOL-BREF score, whereas age, insurance coverage, and income level were associated with domains 1 through 4, respectively (P < 0.05). Conclusion Endometriosis affects various aspects of the quality of life of Iranian women who therefore require holistic management focused on both, the physical and psychological aspects of treatment. © 2018 Korean Society of Obstetrics and Gynecology

Trends in ovarian cancer incidence in Iran

Background: Cancer is amajorcause of morbidityandmortality,amongwhichovarian cancer has a high incidenceandcase fatality. Gaining insight into the epidemiology and trends of ovarian cancer can be very influential in cancer screening and treatments programming. This study aimed to investigate the trends in the incidence of ovarian cancer in Iran, because this issue has been neglected so far. Methods: This study is a re-analysis of existing data from the cancer data recording system in Iran during the years 2003 to 2009. The incidence rates reported were standardized according to the world health organization (WHO) and the trend in the incidence of this disease was determined by STATA software and the significance of the morbidity trend diagram was also derived via WINPEPI software. Results: The statistics of cancer registry center shows an increasing trend of ovarian cancer from 2003 to 2008, while it decreased from 2008 to 2009. During this period, 6078 cases of ovarian cancer were registered in Iran, increasing from 591 cases in 2003 to 1077 in 2009, which shows an approximately 2-fold increase in the incidence of registered cases. During these seven years, the highest incidence rate was seen in Markazi province with 6.33 per 100,000 persons and the least in Kohkiloye-va-Boyerahmad province with zero incidence. Almost all provinces, except a few, had increasing incidence of ovarian cancer. Conclusions: According to the results of the study, the incidence of ovarian cancer is increasing in Iran, especially in the central and northwestern regions of the country. This increase may be due to changing the patterns of risk factors for this disease, such as changes in lifestyle in the population, which will lead to changes in the incidence of the disease. Hence, due to the increase in incidence of this cancer, it is recommended to implement screening and early detection programs in high risk areas and populations. © 2016, Iranian Journal of Cancer Prevention

Loss of expression of TGF-βs and their receptors in chronic skin lesions induced by sulfur mustard as compared with chronic contact dermatitis patients

<p>Abstract</p> <p>Background</p> <p>Sulfur mustard (SM) is a blister-forming agent that has been used as a chemical weapon. Sulfur mustard can cause damage in various organs, especially the skin, respiratory system, and eyes. Generally, the multiple complications of mustard gas result from its alkalizing potency; it reacts with cellular components like DNA, RNA, proteins, and lipid membranes.</p> <p>TGF-β is a multi-functional cytokine with multiple biological effects ranging from cell differentiation and growth inhibition to extracellular matrix stimulation, immunosuppression, and immunomodulation. TGF-β has 3 isoforms (TGF-β 1, 2, 3) and its signaling is mediated by its receptors: R1, R2 and intracellular Smads molecules.</p> <p>TGF-β has been shown to have anti-inflammatory effects. TGF-βs and their receptors also have an important role in modulation of skin inflammation, proliferation of epidermal cells, and wound healing, and they have been implicated in different types of skin inflammatory disorders.</p> <p>Methods</p> <p>Seventeen exposed SM individuals (48.47 ± 9.3 years), 17 chronic dermatitis patients (46.52 ± 14.6 years), and 5 normal controls (44.00 ± 14.6 years) were enrolled in this study.</p> <p>Evaluation of TGF-βs and their receptors expressions was performed by semiquantitative RT-PCR. Only TGF1was analyzed immunohistochemically.</p> <p>Results</p> <p>Our results showed significant decreases in the expression percentages of TGF-β 1, 2 and R1, R2 in chemical victims in comparison with chronic dermatitis and normal subjects and significant decreases in the intensity of R1 and R2 expressions in chemical victims in comparison with chronic dermatitis and normal controls. (P value < 0.05)</p> <p>Conclusions</p> <p>TGF-βs and their receptors appear to have a noticeable role in chronic inflammatory skin lesions caused by sulfur mustard.</p

Angiotensin-converting enzyme genotype and late respiratory complications of mustard gas exposure

<p>Abstract</p> <p>Background</p> <p>Exposure to mustard gas frequently results in long-term respiratory complications. However the factors which drive the development and progression of these complications remain unclear. The Renin Angiotensin System (RAS) has been implicated in lung inflammatory and fibrotic responses. Genetic variation within the gene coding for the Angiotensin Converting Enzyme (ACE), specifically the Insertion/Deletion polymorphism (I/D), is associated with variable levels of ACE and with the severity of several acute and chronic respiratory diseases. We hypothesized that the ACE genotype might influence the severity of late respiratory complications of mustard gas exposure.</p> <p>Methods</p> <p>208 Kurdish patients who had suffered high exposure to mustard gas, as defined by cutaneous lesions at initial assessment, in Sardasht, Iran on June 29 1987, underwent clinical examination, spirometric evaluation and ACE Insertion/Deletion genotyping in September 2005.</p> <p>Results</p> <p>ACE genotype was determined in 207 subjects. As a continuous variable, FEV₁% predicted tended to be higher in association with the D allele 68.03 ± 20.5%, 69.4 ± 21.4% and 74.8 ± 20.1% for II, ID and DD genotypes respectively. Median FEV₁% predicted was 73 and this was taken as a cut off between groups defined as having better or worse lung function. The ACE DD genotype was overrepresented in the better spirometry group (Chi²4.9 p = 0.03). Increasing age at the time of exposure was associated with reduced FEV₁%predicted (p = 0.001), whereas gender was not (p = 0.43).</p> <p>Conclusion</p> <p>The ACE D allele is associated with higher FEV₁% predicted when assessed 18 years after high exposure to mustard gas.</p

Acute and delayed sulfur mustard toxicity; novel mechanisms and future studies

Sulfur mustard (SM), also known as mustard gas, has been the most widely used chemical weapon. The toxicity of SM as an incapacitating agent is of much greater importance than its ability to cause lethality. Acute toxicity of SM is related to reactive oxygen and nitrogen species, DNA damage, poly(ADP-ribose) polymerase activation and energy depletion within the affected cell. Therefore melatonin shows beneficial effects against acute SM toxicity in a variety of manner. It scavenges most of the oxygen- and nitrogen-based reactants, inhibits inducible nitric oxide synthase, repairs DNA damage and restores cellular energy depletion. The delayed toxicity of SM however, currently has no mechanistic explanation. We propose that epigenetic aberrations may be responsible for delayed detrimental effects of mustard poisoning. Epigenetic refers to the study of changes that influence the phenotype without causing alteration of the genotype. It involves changes in the properties of a cell that are inherited but do not involve a change in DNA sequence. It is now known that in addition to genetic mutations, epimutations can also involve in the pathogenesis of a variety of human diseases. Several actions of melatonin are now delineated by epigenetic actions including modulation of histone acetylation and DNA methylation. Future studies are warranted to clarify whether epigenetic mechanisms are involved in pathogenesis of delayed sulfur mustard toxicity and melatonin alleviates delayed toxicity of this warfare agent

Global burden of peripheral artery disease and its risk factors, 1990–2019: a systematic analysis for the Global Burden of Disease Study 2019

Background: Peripheral artery disease is a growing public health problem. We aimed to estimate the global disease burden of peripheral artery disease, its risk factors, and temporospatial trends to inform policy and public measures. Methods: Data on peripheral artery disease were modelled using the Global Burden of Disease, Injuries, and Risk Factors Study (GBD) 2019 database. Prevalence, disability-adjusted life years (DALYs), and mortality estimates of peripheral artery disease were extracted from GBD 2019. Total DALYs and age-standardised DALY rate of peripheral artery disease attributed to modifiable risk factors were also assessed. Findings: In 2019, the number of people aged 40 years and older with peripheral artery disease was 113 million (95% uncertainty interval [UI] 99·2–128·4), with a global prevalence of 1·52% (95% UI 1·33–1·72), of which 42·6% was in countries with low to middle Socio-demographic Index (SDI). The global prevalence of peripheral artery disease was higher in older people, (14·91% [12·41–17·87] in those aged 80–84 years), and was generally higher in females than in males. Globally, the total number of DALYs attributable to modifiable risk factors in 2019 accounted for 69·4% (64·2–74·3) of total peripheral artery disease DALYs. The prevalence of peripheral artery disease was highest in countries with high SDI and lowest in countries with low SDI, whereas DALY and mortality rates showed U-shaped curves, with the highest burden in the high and low SDI quintiles. Interpretation: The total number of people with peripheral artery disease has increased globally from 1990 to 2019. Despite the lower prevalence of peripheral artery disease in males and low-income countries, these groups showed similar DALY rates to females and higher-income countries, highlighting disproportionate burden in these groups. Modifiable risk factors were responsible for around 70% of the global peripheral artery disease burden. Public measures could mitigate the burden of peripheral artery disease by modifying risk factors. Funding: Bill & Melinda Gates Foundation

Epigenetic perturbations in the pathogenesis of mustard toxicity; hypothesis and preliminary results

Among the most readily available chemical warfare agents, sulfur mustard (SM), also known as mustard gas, has been the most widely used chemical weapon. SM causes debilitating effects that can leave an exposed individual incapacitated for days to months; therefore delayed SM toxicity is of much greater importance than its ability to cause lethality. Although not fully understood, acute toxicity of SM is related to reactive oxygen and nitrogen species, oxidative stress, DNA damage, poly(ADP-ribose) polymerase (PARP) activation and energy depletion within the affected cell. Therefore several antioxidants and PARP inhibitors show beneficial effects against acute SM toxicity. The delayed toxicity of SM however, currently has no clear mechanistic explanation. One third of the 100,000 Iranian casualties are still suffering from the detrimental effects of SM in spite of the extensive treatment. We, therefore, made an attempt whether epigenetic aberrations may contribute to pathogenesis of mustard poisoning. Preliminary evidence reveals that mechlorethamine (a nitrogen mustard derivative) exposure may not only cause oxidative stress, DNA damage, but epigenetic perturbations as well. Epigenetic refers to the study of changes that influence the phenotype without causing alteration of the genotype. It involves changes in the properties of a cell that are inherited but do not involve a change in DNA sequence. It is now known that in addition to mutations, epimutations contribute to a variety of human diseases. Under light of preliminary results, the current hypothesis will focus on epigenetic regulations to clarify mustard toxicity and the use of drugs to correct possible epigenetic defects

Toxicological Effects of Weapons of Mass Destruction and Noxious Agents in Modern Warfare and Terorrism

Oružja za masovno uništavanje najbolji su primjer uporabe civilizacijskih tehnoloških dostignuća u štetne svrhe i protiv ljudske civilizacije. Unatoč nastojanjima oko kontrole i smanjenja njihove količine, rizik zbog samoga postojanja pa čak i širenja zahtijeva da se o njihovoj uporabi i dalje vodi računa i da se povećaju obrambene mjere – nuklearno-biološko-kemijske obrane (NBKO). Osim suvremenog vojnika koji je u vojnim i mirovnim operacijama diljem svijeta izložen raznim noksama kemijskog, biološkog i radiološkog podrijetla, nezaštićeno i uglavnom slabo educirano civilno stanovništvo može biti izloženo terorističkim napadima. Oružja za masovno uništavanje i nokse kemijskog, biološkog i radiološkog podrijetla uzrokuju razne toksikološke posljedice, a bez obzira na njihovo podrijetlo, imaju zajednički nazivnik djelovanja – poremećaj fi ziološkog stanja u organizmu. Poremećaji proizašli nakon izlaganja tim noksama nerijetko se teško determiniraju, dijagnosticiraju i liječe. U ovome su radu s biomedicinskog aspekta obrađene važnije nokse kemijskog, biološkog i radiološkog podrijetla na temelju odabranih primjera iz terorizma i suvremenog ratovanja: polonij-210, osiromašeni uran, salmonela, bedrenica (antraks), genetički modifi cirane bakterije, polimerno predivo “paučina” i bojni otrovi sarin i iperit.Weapons of mass destruction (WMD) best portray the twisted use of technological achievements against the human species. Despite arm control efforts, WMD threat continues to exist and even proliferate. This in turn calls for improvement in defensive measures against this threat. The modern soldier is exposed to a number of chemical, biological, and radiological agents in military and peace operations, while civilians are mainly exposed to terrorist attacks. Regardless of origin or mode of action, WMDs and other noxious agents aim for the same – to make an organism dysfunctional. Because their effects are often delayed, these agents are hard to spot on time and treat. This review presents a biomedical aspect of agents used in warfare and terrorism, including polonium-210, depleted uranium, salmonella, anthrax, genetically modifi ed bacteria, cobweb-like polymer fi bre, sarin, and mustard gas