Publications by authors named "Sayed Hossein Davoodi"

Background And Aim: Prediabetes is associated with metabolic disturbances that significantly increase the risk of developing cardiovascular disease (CVD). Probiotics and synbiotics may improve metabolic health, but their impact on CVD risk factors in prediabetic adults needs further evaluation. This meta-analysis evaluates the effects of probiotic and synbiotic supplementation on cardiovascular risk factors in individuals with prediabetes.

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Probiotic and synbiotic supplementation has garnered attention for its potential to modulate metabolic parameters, including glycemic control, in individuals with prediabetes and type 2 diabetes mellitus (T2DM). This systematic review and dose-response meta-analysis aims to evaluate the effectiveness of these supplements on glycemic indices, synthesizing evidence from randomized controlled trials (RCTs) with grade-assessed methodologies. A comprehensive search of scientific databases was conducted from inception through January 2025 to identify RCTs assessing the effects of probiotic and synbiotic supplementation on glycemic indices, including fasting blood glucose (FBG), fasting insulin (FI), hemoglobin A1c (HbA1c), and homeostatic model assessment for insulin resistance (HOMA-IR).

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Article Synopsis
  • Engineered probiotics (EPs) have potential applications in treating chronic and congenital diseases, but there has been no systematic review of their effects on congenital metabolic disorders.
  • A systematic review identified 11 relevant studies, ultimately narrowing down to 7 articles focused on phenylketonuria (PKU) and hyperammonemia, involving various animal models and human subjects.
  • The findings suggest EPs can be effective in managing PKU, while certain wild strains show promise in addressing hyperammonemia without further genetic manipulation.
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Several risk factors, including nutritional/lifestyle ones, play a role in gastric cancer etiology. Further interactions with mental health have also been emphasized. We hypothesized that individuals with mental disorders would exhibit compromised nutrient intake, increasing their risk of gastric cancer.

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Purpose: No conclusive information is available about the association between hypothyroidism or hyperthyroidism and risk of colorectal cancer (CRC). We therefore aimed to summarize the findings of observational studies on the relation between hypothyroidism or hyperthyroidism and risk of CRC.

Methods: A literature search was conducted using relevant keywords in online databases for appropriate publications through July 2023.

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Background: A low micronutrient intake has been reported to contribute to the double-burden of obesity, increasing the risk for chronic diseases such as cardiovascular disease, diabetes, cancer, and mental disorders. This case-control study compared micronutrient intake profiles in overweight/obese vs. normal-weight individuals.

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Background: Osteoporosis is a health complication worldwide, especially in developing countries. The prevalence was reported to be 18.3% globally.

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Background & Aims: Dietary quality and patterns have been associated with reduced incidence and increased colorectal cancer (CRC) survival. Two validated scores representing the quality of diet defined respectively by their content in micronutrients (nutritional quality index (INQ)) and antioxidant (dietary antioxidant index (DAI)) were used for assessing dietary quality. INQ standardizes all micronutrients using the recommended values and adjusts nutrients intakes based on total energy.

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Context: There is still controversy over the effect of vitamin D3 supplementation on bone health.

Objective: The effects of vitamin D3 supplementation on bone mineral density (BMD) and markers of bone turnover, as well as the dose-response relationship between vitamin D3 and bone health in adults, were evaluated.

Data Sources: The PubMed, Scopus, Cochrane, Web of Science, and AGRIS databases were searched for articles published through April 30, 2022.

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Background: The risk of cervical cancer was reported to be influenced by dietary components. This study aimed to illustrate the association between cervical cancer with the intake of food groups in women with a history of cervical neoplasia.

Methods: This nested case-control study was conducted in 558 people with a history of cervical intraepithelial neoplasia (CIN), including 279 women with cervical cancers and 279 controls with low-grade squamous intraepithelial lesions (LSIL).

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Article Synopsis
  • * The review analyzed data from 39 studies involving humans and animals, focusing on the effects of EPs on conditions like arthritis, cancer, autoimmune diseases, and diabetes, among others.
  • * The main mechanism of EPs is the induction of oral tolerance, alongside providing oral vaccines and bioactive compounds, indicating their significant potential in addressing chronic and genetic diseases.
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Background: We aimed to evaluate the anti-cancer and immune system enhancing properties of Vitamin E succinate (VES) and methylselenic acid (MSA) administration on 4T1 breast tumor model under high-dose methotrexate (HDMTX) therapy and folinic acid (FA) rescue.

Methods: Thirty six 4T1 mammary carcinoma bearing mice were randomly divided into six groups: control (untreated; n = 6), treatment-1 (T1 group; HDMTX; n = 6), T2 (T1 + FA; n = 6), T3 (T2 + MSA; n = 6), T4 (T2 + VES; n = 6) and T5 (T3 + VES; n = 6). On day 21 of the study, all surviving mice were sacrificed and primary tumors and peripheral tissues were examined for histological and gene expression assays.

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Background And Objective: Sunlight exposure, the main source of endogenous vitamin D synthesis, may increase the risk of non-melanoma skin cancers (NMSC) development. Vitamin D receptor (VDR) polymorphisms are associated with various malignancies. This study aimed to examine the associations between vitamin D status and VDR FokI polymorphisms in Iranian subjects with NMSC.

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The relationship between dietary antioxidants and breast cancer (BrCa) has been investigated in various studies. As a limitation, they generally investigate the relationship between one specific antioxidant and the risk/odds of BrCa, and synergistic or inhibitory effects are less considered. Dietary antioxidant index (DAI) is a reliable nutritional tool that evaluates total nutritional antioxidant capacity and is validated with serum total antioxidant capacity (TAC) and Malondialdehyde (MDA).

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Background: The index of nutritional quality (INQ) is derived from the food frequency questionnaire (FFQ) and is a method of quantitative and qualitative analysis of diet. This study aimed to compare the INQ for different dietary components between breast cancer (BC) patients and healthy control.

Methods: This case-control study was performed on 180 women with BC and 360 healthy women.

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This study assessed the bioactive peptides content of milk from different species, including humans, camel, bovine, buffalo, donkey, sheep, goat, and horse. The highest and lowest concentrations of total digestion-resistant peptides were estimated in sheep and human milk. Donkey milk casein contains a higher angiotensin-converting enzyme (ACE) inhibitory, dipeptidyl peptidase III (DPP-III) inhibitory, DPP-IV inhibitory, and antioxidant peptides.

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Bioactive peptides (BPs) content of dairy products is suggested to be a significant ingredient for reducing breast cancer (BC) risk. There is no observational study regarding the correlation between BPs and the risk of chronic disease because BPs' content of food items has not been evaluated in any study. The goal of the current study was to assess the association of dairy-originated BPs with BC risk.

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Background: Evidence indicates the lower intake of fruits and vegetables than the recommended daily amount. Study aimed at determining the effects of peer education intervention on the consumption of fruits and vegetable in housewives.

Methods: A quasi-experimental was conducted with 130 housewives referring to health care centers in Bandar Abbas, Iran.

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The associations between components of metabolic syndrome (MetS), insulin resistance (IR), and several malignancies have been reported. However, the possible link between IR and dermal malignancies, including non-melanoma skin cancers (NMSCs), has not been investigated to date. In this study, we aimed to examine the possible association between components of MetS, IR, adhesion molecules, and NMSC for the first time.

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Article Synopsis
  • The study focuses on the relationship between vitamin D and breast cancer, specifically examining how variations in the vitamin D receptor (VDR) genes affect responses to vitamin D supplementation among breast cancer survivors.
  • It will involve 198 participants receiving 4000 IU of vitamin D3 daily for 12 weeks, measuring changes in plasma vitamin D levels and various biomarkers related to inflammation, cell health, and cancer progression.
  • The research aims to clarify inconsistencies in previous studies about vitamin D's role in cancer by integrating genetic variations with environmental influences on individual health responses.
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The optimal vitamin D supplementation plan during lactation is unclear. We investigated the effect of maternal vitamin D supplementation on mother-infant dyads' vitamin D status during lactation. All controlled trials that compared vitamin D supplements to placebo or low doses of vitamin D in breastfeeding mothers were included.

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Background And Aim: The association between the rs9939609 polymorphism of fat mass and obesity-associated gene (FTO) and risk of colorectal cancer is controversial. This study aims to evaluate the relationship between FTO rs9939609 polymorphism and colorectal cancer (CRC) in Iranian people.

Methods: A case-control study was conducted on 125 patients with CRC and 250 healthy subjects in Tehran, Iran.

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The preventive effect of vitamin D against breast cancer can be influenced by gene polymorphisms. This study aimed to investigate the association between serum level of 25(OH) vitamin D and FTO genotype in breast cancer patients. A cross-sectional study was carried out on 180 newly diagnosed patients with breast cancer in Tehran, Iran.

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Background: Obesity is a multifactorial disease, and about 40% of world adults are overweight, and about 20% are obese. Diet is one of the most important factors in the causality of obesity. The interactions between the diet and gut microbiota or chronic inflammation pathways highlight the importance of its various aspects in the incidence and prevalence of obesity.

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