Dietary Patterns and Breast Cancer Risk: A Multi-Centre Case Control Study among North Indian Women.
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ABSTRACT:
SUBMITTER: Shridhar K
PROVIDER: S-EPMC6164652 | biostudies-literature | 2018 Sep
REPOSITORIES: biostudies-literature
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Dietary Patterns and Breast Cancer Risk: A Multi-Centre Case Control Study among North Indian Women.
Shridhar Krithiga K Singh Gurpreet G Dey Subhojit S Singh Dhatt Sarvdeep S Paul Singh Gill Jatinder J Goodman Michael M Samar Magsumbol Melina M Pearce Neil N Singh Sandeep S Singh Archna A Singh Preeti P Singh Thakur Jarnail J Kaur Dhillon Preet P
International journal of environmental research and public health 20180906 9
Evidence from India, a country with unique and distinct food intake patterns often characterized by lifelong adherence, may offer important insight into the role of diet in breast cancer etiology. We evaluated the association between Indian dietary patterns and breast cancer risk in a multi-centre case-control study conducted in the North Indian states of Punjab and Haryana. Eligible cases were women 30⁻69 years of age, with newly diagnosed, biopsy-confirmed breast cancer recruited from hospital ...[more]
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| S-EPMC4183855 | biostudies-other
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| S-EPMC7094865 | biostudies-literature
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Project description:Breast cancer is the most prevalent cancer in females worldwide. Studies evaluating the blood vitamins and minerals status in the breast cancer etiology are limited, and the results are inconclusive. This study analyzed the association between serum vitamin-mineral profiles (V-MPs) and breast cancer (BC) risk with including dietary patterns (DPs) and the use of supplements. This case-control study involved 420 women aged 40-79 years from north-eastern Poland, including 190 newly diagnosed breast cancer cases. The fasting serum concentrations of vitamins (folate, cobalamin, 25(OH) vitamin D) and minerals (iron, calcium, magnesium) were measured in 129 post-menopausal women, including 82 controls and 47 cases. Three V-MPs were derived with a Principal Component Analysis (PCA). A logistic regression analysis was performed to estimate the odds ratio (OR) and 95% confidence interval (95% CI) of the breast cancer risk associated with serum V-MPs and serum levels of single biomarkers. The risk of BC was lower by 88% (OR: 0.12; 95% Cl: 0.02-0.88; p < 0.05) in the upper tertile of the serum 'Iron-Calcium' profile compared to the bottom tertile, lower by 67% (OR: 0.33; 95% Cl: 0.11-0.97; p < 0.05) at the level of serum 25(OH) vitamin D ?24.6 ng/mL and lower by 68% (OR: 0.32; 95% Cl: 0.11-0.91; p < 0.05) at the level of serum calcium ?9.6 mg/dL. There was an inverse association of the serum 'Magnesium' profile or serum level of iron with the risk of BC, which disappeared after adjustment for the set of confounders accounted for: age, body mass index (BMI), socioeconomic status, overall physical activity, smoking status, age at menarche, number of full-term pregnancies, oral contraceptive use, hormone-replacement therapy use, family history of breast cancer, vitamin/mineral supplement use, the molecular subtype of breast cancer, and dietary patterns. No significant association was found between BC risk and the serum 'Folate-Cobalamin-Vitamin D' profile or serum folate, cobalamin or magnesium considered separately. These findings highlight that a higher-normal serum level of both iron and calcium, considered together as the serum profile, as well as a higher-normal serum level of calcium, considered separately, and a slightly below the normal range of serum vitamin D level may protect against breast cancer among postmenopausal women, independent of dietary patterns or the use of vitamin/mineral supplements. Therefore, the maintenance of the adequate status of vitamins and minerals and the regular monitoring of their blood markers should be included in breast cancer prevention.
| S-EPMC6770708 | biostudies-literature
Project description:IntroductionTGF-?1 is a multi-functional cytokine that plays an important role in breast carcinogenesis. Critical role of TGF-?1 signaling in breast cancer progression is well documented. Some TGF-?1 polymorphisms influence its expression; however, their impact on breast cancer risk is not clear.MethodsWe analyzed 1222 samples in a candidate gene-based genetic association study on two distantly located and ethnically divergent case-control groups of Indian women, followed by a population-based genetic epidemiology study analyzing these polymorphisms in other Indian populations. The c.29C>T (Pro10Leu, rs1982073 or rs1800470) and c.74G>C (Arg25Pro, rs1800471) polymorphisms in the TGF-?1 gene were analyzed using direct DNA sequencing, and peripheral level of TGF-?1 were measured by ELISA.Resultsc.29C>T substitution increased breast cancer risk, irrespective of ethnicity and menopausal status. On the other hand, c.74G>C substitution reduced breast cancer risk significantly in the north Indian group (p?=?0.0005) and only in the pre-menopausal women. The protective effect of c.74G>C polymorphism may be ethnicity-specific, as no association was seen in south Indian group. The polymorphic status of c.29C>T was comparable among Indo-Europeans, Dravidians, and Tibeto-Burmans. Interestingly, we found that Tibeto-Burmans lack polymorphism at c.74G>C locus as true for the Chinese populations. However, the Brahmins of Nepal (Indo-Europeans) showed polymorphism in 2.08% of alleles. Mean TGF-?1 was significantly elevated in patients in comparison to controls (p<0.001).Conclusionc.29C>T and c.74G>C polymorphisms in the TGF-?1 gene significantly affect breast cancer risk, which correlates with elevated TGF-?1 level in the patients. The c.29C>T locus is polymorphic across ethnically different populations, but c.74G>C locus is monomorphic in Tibeto-Burmans and polymorphic in other Indian populations.
| S-EPMC3798290 | biostudies-literature
Project description:OBJECTIVES: The study was carried out to investigate the prevalence, risk factors, and Pregnancy outcome in anti-HCV-positives pregnant women admitted for delivery in the Department of Obstetrics & Gynecology of Guru Gobind Singh Medical College and Hospital, Faridkot between January 2010 and January 2013. SETTING: Department of obstetrics and Gynaecology of GGS Medical College and Hospital, Faridkot. MATERIAL AND METHODS: A case-control study design was selected for the study. A total of 1412 pregnant women presenting in the labor room of our hospital between January 2010 and January 2013 were subjected to anti-HCV testing by third generation ELISA. Age, parity, and gestational age-matched controls were taken from the women delivering during the same time frame who tested negative for hepatitis C. All the subjects and controls were non-reactive for HIV and HBsAg as well. Risk factors and pregnancy outcome were compared with the control group. Approval was taken from ethic committee of the institute. The women who consented to participate in the study were evaluated on the basis of a questionnaire for the presence of risk factors of hepatitis C and pregnancy outcome. Women with the known previous liver disease were excluded from the study. Data were analyzed using SPSS for Windows version 16.0. p < 0.05 was considered significant. RESULTS: Forty patients tested positive for anti-HCV antibodies among 1,412 patients subjected to anti-HCV testing during study period. 40 patients were taken as controls, who were negative for anti-HCV antibodies. Prevalence of HCV during pregnancy was 2.8 % in our study. Among the risk factors studied, previous surgery and blood transfusion were the statistically significant risk factors. There was history of previous major surgery in 16 cases versus 4 controls and was statistically significant (p value 0.002) at p < 0.05. History of blood transfusion was present in 4 versus 2 among cases and controls, respectively, and statistically significant (p value 0.004) at p < 0.05. Sexual transmission was not the risk factor as none of the spouse of the pregnant women was positive for HCV antibodies. Neonatal outcome was similar in both groups. Pregnancy complications i.e., Pregnancy-induced hypertension and antepartum hemorrhage were significantly higher in study group compared to control group. CONCLUSION: Incidence of hepatitis C virus infection in pregnancy is 2.8 %. Surgical procedures, blood transfusion, are the major risk factors for transmission. There are no identifiable risk factors in 35 % of cases. Pregnancy complications like Pregnancy-induced hypertension and antepartum hemorrhage are more common in HCV-positive mothers. Neonatal outcome is not affected. Universal screening of all pregnant women should be done for HCV as many patients may not have any risk factor.
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Project description:Study questionIs oocyte cryopreservation an applicable option for fertility preservation in unmarried patients with haematological malignancies?Summary answerOocyte cryopreservation via the vitrification method is accessible and may be considered an option for fertility preservation in unmarried patients with haematological malignancies.What is known alreadyHaematological malignancies are most commonly observed amongst adolescent and young adult women. Although the survival rate and life expectancy of those with haematological malignancies have improved, chemotherapy and radiotherapy may impair their reproductive potential. Oocyte cryopreservation is thus an ideal option to preserve their fertility.Study design size durationThis study retrospectively evaluated 193 unmarried patients (age: 26.2 ± 0.4 years) with haematological malignancies, who consulted for oocyte cryopreservation across 20 different fertility centres in Japan between February 2007 and January 2015. The primary outcome measures were the oocyte retrievals and oocyte cryopreservation outcomes. The secondary outcome measures were the outcomes following oocyte warming for IVF.Participants/materials setting methodsThe patients had commenced ovarian stimulation cycles via antagonist, agonist, natural and minimal methods for oocyte retrievals, defined according to the treatment strategy of each respective fertility centre. A vitrification method using the Cryotop safety kit was used for oocyte cryopreservation. ICSIs were used for insemination of warmed oocytes. The endometrial preparation method for embryo transfer was hormonal replacement therapy, except in the case of a patient who underwent a spontaneous ovulatory cycle.Main results and the role of chanceAmong 193 patients, acute myeloid leukaemia (n = 45, 23.3%) was most common, followed by acute lymphoid leukaemia (n = 38, 19.7%) and Hodgkin's lymphoma (n = 30, 15.5%). In total, 162 patients (83.9%) underwent oocyte retrieval, and oocytes were successfully cryopreserved for 155 patients (80.3%). The mean number of oocyte retrieval cycles and cryopreserved oocytes were 1.7 ± 0.2 and 6.3 ± 0.4, respectively. As of December 2019, 14 patients (9.2%) had requested oocyte warming for IVF. The survival rate of oocytes after vitrification-warming was 85.2% (75/88). The rates of fertilisation and embryo development were 80.0% (60/75) and 46.7% (28/60), respectively. Ten patients (71.4%) had successful embryo transfers, and seven live births (50.0%) were achieved.Limitations reasons for cautionThis study was limited by its retrospective nature. Additionally, there remains an insufficient number of cases regarding the warming of vitrified oocytes to reliably conclude whether oocyte cryopreservation is effective for patients with haematological malignancies. Further long-term follow-up study is required.Wider implications of the findingsOocyte retrieval and oocyte cryopreservation were accessible for patients with haematological malignancies; however, the number of oocyte retrievals may have been limited due to the initiation of cancer treatments. Acceptable embryonic and pregnancy outcomes could be achieved following oocyte warming; therefore, our results suggest that oocyte cryopreservation can be considered an option for fertility preservation in patients with haematological malignancies.Study funding/competing interestsThis research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors. The authors declare no conflict of interest.Trial registration numberN/A.
| S-EPMC7810816 | biostudies-literature