Amir Shamshirian

Mr. Amir Shamshirian


Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 December 2019 in JAMA Oncology
Verified
Journal Article
Open access
PDF file
GCGlobal Burden of Disease Cancer Collaboration
Global Burden of Disease Cancer Collaboration
CFChristina Fitzmaurice
Christina Fitzmaurice
DADegu Abate
Degu Abate
NANaghmeh Abbasi
Naghmeh Abbasi
HAHedayat Abbastabar
Hedayat Abbastabar
CMChristopher J. L. Murray
Christopher J. L. Murray
Cancer is now widely recognized as a global problem that unfortunately lacks a global solution. The latest United Nations high-level meeting on noncommunicable diseases (NCDs) exemplified this conundrum.1 Despite global commitment to reducing the risk of and disability from NCDs, including cancer, implementation of known solutions is inadequate to reach the 2011 Political Declaration on the Prevention and Control of Noncommunicable Diseases2,3 (25% reduction in premature mortality from NCDs by 2025) and the third Sustainable Development Goal (by 2030 reduce by one-third premature mortality from NCDs through prevention and treatment, and promote mental health and well-being).4 To reduce cancer burden, identifying the scope of the problem and mapping out implementation of solutions is best done in National Cancer Control Plans (NCCPs). However, a recent review showed that only 29% of low-income countries had a NCCP, and even if NCCPs existed, cost, financing, monitoring, and expansion of information systems was often inadequate. Many highly effective prevention and treatment strategies exist for cancer. However, they are often very specific (eg, vaccination for human papillomavirus and hepatitis B virus for prevention of cervical and liver cancer, or tyrosine kinase inhibitors for cancers with targetable mutations). Effective NCCPs therefore require detailed knowledge about the local burden of cancer and associated risk factors. We herein present results from the Global Burden of Disease (GBD) 2017 study describing cancer incidence, mortality, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs) for 195 countries from 1990 through 2017, which can inform cancer control through policy, resource allocation, and health system planning.

1 September 2019 in The Lancet Oncology
Verified
Journal Article
Open access
LFLisa M. Force
Lisa M. Force
IAIbrahim Abdollahpour
Ibrahim Abdollahpour
SAShailesh M Advani
Shailesh M Advani
DADominic Agius
Dominic Agius
EAElham Ahmadian
Elham Ahmadian
NBNickhill Bhakta
Nickhill Bhakta
Accurate childhood cancer burden data are crucial for resource planning and health policy prioritisation. Model-based estimates are necessary because cancer surveillance data are scarce or non-existent in many countries. Although global incidence and mortality estimates are available, there are no previous analyses of the global burden of childhood cancer represented in disability-adjusted life-years (DALYs). Using the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2017 methodology, childhood (ages 0-19 years) cancer mortality was estimated by use of vital registration system data, verbal autopsy data, and population-based cancer registry incidence data, which were transformed to mortality estimates through modelled mortality-to-incidence ratios (MIRs). Childhood cancer incidence was estimated using the mortality estimates and corresponding MIRs. Prevalence estimates were calculated by using MIR to model survival and multiplied by disability weights to obtain years lived with disability (YLDs). Years of life lost (YLLs) were calculated by multiplying age-specific cancer deaths by the difference between the age of death and a reference life expectancy. DALYs were calculated as the sum of YLLs and YLDs. Final point estimates are reported with 95% uncertainty intervals. Globally, in 2017, there were 11·5 million (95% uncertainty interval 10·6-12·3) DALYs due to childhood cancer, 97·3% (97·3-97·3) of which were attributable to YLLs and 2·7% (2·7-2·7) of which were attributable to YLDs. Childhood cancer was the sixth leading cause of total cancer burden globally and the ninth leading cause of childhood disease burden globally. 82·2% (82·1-82·2) of global childhood cancer DALYs occurred in low, low-middle, or middle Socio-demographic Index locations, whereas 50·3% (50·3-50·3) of adult cancer DALYs occurred in these same locations. Cancers that are uncategorised in the current GBD framework comprised 26·5% (26·5-26·5) of global childhood cancer DALYs. The GBD 2017 results call attention to the substantial burden of childhood cancer globally, which disproportionately affects populations in resource-limited settings. The use of DALY-based estimates is crucial in demonstrating that childhood cancer burden represents an important global cancer and child health concern. Bill & Melinda Gates Foundation, American Lebanese Syrian Associated Charities (ALSAC), and St. Baldrick's Foundation.

1 October 2019 in Pathology - Research and Practice
Verified
Journal Article
Closed access
FGFaezeh Ghasemi
Faezeh Ghasemi
MSMojtaba Shafiee
Mojtaba Shafiee
ZBZarrin Banikazemi
Zarrin Banikazemi
MPMohammad Hossein Pourhanifeh
Mohammad Hossein Pourhanifeh
HKHashem Khanbabaei
Hashem Khanbabaei
HMHamed Mirzaei
Hamed Mirzaei

16 October 2019 in Nature
Verified
Journal Article
Open access
PDF file
RBRoy Burstein
Roy Burstein
NHNathaniel J Henry
Nathaniel J Henry
MCMichael L Collison
Michael L Collison
LMLaurie B Marczak
Laurie B Marczak
ASAmber Sligar
Amber Sligar
SHSimon Hay
Simon Hay
Since 2000, many countries have achieved considerable success in improving child survival, but localized progress remains unclear. To inform efforts towards United Nations Sustainable Development Goal 3.2—to end preventable child deaths by 2030—we need consistently estimated data at the subnational level regarding child mortality rates and trends. Here we quantified, for the period 2000–2017, the subnational variation in mortality rates and number of deaths of neonates, infants and children under 5 years of age within 99 low- and middle-income countries using a geostatistical survival model. We estimated that 32% of children under 5 in these countries lived in districts that had attained rates of 25 or fewer child deaths per 1,000 live births by 2017, and that 58% of child deaths between 2000 and 2017 in these countries could have been averted in the absence of geographical inequality. This study enables the identification of high-mortality clusters, patterns of progress and geographical inequalities to inform appropriate investments and implementations that will help to improve the health of all populations.

13 November 2018 in Critical Reviews in Food Science and Nutrition
Verified
Journal Article
Closed access
RTReza Tabrizi
Reza Tabrizi
OTOmid Reza Tamtaji
Omid Reza Tamtaji
KLKamran B. Lankarani
Kamran B. Lankarani
MAMaryam Akbari
Maryam Akbari
EDEhsan Dadgostar
Ehsan Dadgostar
ZAZatollah Asemi
Zatollah Asemi
This systematic review and meta-analysis of randomized controlled trials (RCTs) was conducted to summarize the effect of resveratrol intake on weight loss. We searched the following databases until July 2018: MEDLINE, EMBASE, Web of Science and Cochrane Central Register of Controlled Trials. Data were pooled using the inverse variance method and expressed as standardized mean difference (SMD) with 95% confidence intervals (95% CI). Out of 831 reports, 36 RCTs were eligible for including to our meta-analysis. The pooled results, using random-effects model showed that resveratrol supplementation significantly decreased body weight (SMD = -0.17; 95% CI, -0.33, -0.01; P = 0.03; I2: 62.6), body mass index (BMI) (SMD = -0.20; 95% CI, -0.35, -0.05; P = 0.01; I2: 60.6), fat mass (SMD = -0.32; 95% CI, -0.62, -0.03; P = 0.03; I2: 77.9) and waist circumference (WC) (SMD = -0.42; 95% CI, -0.68, -0.16; P = 0.001; I2: 75.2), and significantly increased lean mass (SMD = 1.21; 95% CI, 0.75, 1.67; P < 0.001; I2: 87.6). We found no significant effect of resveratrol administration on leptin (SMD = -0.20; 95% CI, -0.68, 0.27; P = 0.40; I2: 85.3) and adiponectin levels (SMD = 0.08; 95% CI, -0.39, 0.55; P = 0.74; I2: 91.0). Resveratrol supplementation significantly decreased body weight in obese patients (SMD -0.43; 95% CI, -0.60, -0.26) compared with other diseases (SMD 0.02; 95% CI, -0.29, 0.33), and type 2 diabetes mellitus (SMD -0.17; 95% CI, -0.37, 0.02). Overall, the current meta-analysis demonstrated that resveratrol intake significantly reduced weight, BMI, WC and fat mass, and significantly increased lean mass, but did not affect leptin and adiponectin levels.

6 August 2021 in International Journal Of Clinical Practice
Verified
Journal Article
Closed access
RGRoya Ghasemian
Roya Ghasemian
ASAmir Shamshirian
Amir Shamshirian
KHKeyvan Heydari
Keyvan Heydari
MMMohammad Malekan
Mohammad Malekan
RAReza Alizadeh-Navaei
Reza Alizadeh-Navaei
DSDanial Shamshirian
Danial Shamshirian