A high resolution LC–MS targeted method for the concomitant analysis of 11 contraceptive progestins and 4 steroids

Publication date: 25 October 2019Source: Journal of Pharmaceutical and Biomedical Analysis, Volume 175Author(s): Csaba Ferenc Laszlo, Jonathan Paz Montoya, Marie Shamseddin, Fabio De Martino, Alexandre Beguin, Rene Nellen, Stephen James Bruce, Marc Moniatte, Hugues Henry, Cathrin BriskenAbstractIn the context of hormonal contraception and hormone replacement therapy (HRT), many women are exposed to exogenous hormones. Current use of hormonal contraception with combined ethinyl estradiol and different progestins bestows a breast cancer relative risk (RR) of 1.2- while combined HRT has a RR of 2. Although these exposures present an important public health issue, little is known about the effects of individual progestins on the breast and other tissues. Increasing availability of large scale biobanks, high throughput analyses and data management tools enable ever expanding, sophisticated population studies. In order to address the impact of distinct progestins on various health indicators, it is desirable to accurately quantify progestins in clinical samples.Here we have developed and validated a high resolution liquid chromatography mass spectrometry (LC–MS) targeted method for the simultaneous quantification of 11 synthetic progestins widely used in oral contraceptives, gestodene, levonorgestrel, etonogestrel, chlormadinone acetate, cyproterone acetate, drospirenone, desacetyl norgestimate, medroxyprogesterone acetate, norethindrone, dienogest, nomegestrol acetate, and 4...
Source: Journal of Pharmaceutical and Biomedical Analysis - Category: Drugs & Pharmacology Source Type: research

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n Su Choi We evaluated the heterogeneity of the effect of known risk factors on breast cancer development based on breast density by using the Breast Imaging-Reporting and Data System (BI-RADS). In total, 4,898,880 women, aged 40–74 years, who participated in the national breast cancer screening program in 2009–2010 were followed up to December 2018. Increased age showed a heterogeneous association with breast cancer (1-year hazard ratio (HR) = 0.92, 1.00 (reference), 1.03, and 1.03 in women with BI-RADS density category 1, 2, 3, and 4, respectively; P-heterogeneity < 0.001). More advanced ag...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
Authors: Lee JS, Oh M Abstract OBJECTIVE: To clarify the limitations of mammography screening for women with dense breasts, we examined breast density and its effects on screening results. PATIENTS AND METHODS: We performed a cross-sectional, observational study on women who underwent mammography. Data from the National Cancer Screening Program(NCSP) from 2009 to 2013 were used. The study population consisted of participants with high breast density. We used a logistic regression analysis to evaluate the relationships between breast density and reproductive factors and screening results according to menopause s...
Source: Asian Pacific Journal of Cancer Prevention - Category: Cancer & Oncology Tags: Asian Pac J Cancer Prev Source Type: research
CONCLUSIONS: Hormone replacement therapy may slightly improve overall survival in women who have undergone surgical treatment for EOC, but the certainty of the evidence is low. HRT may make little or no difference to quality of life, incidence of breast cancer, TIA, CVA and MI as the certainty of the evidence has been assessed as very low. There may be little or no effect of HRT use on progression-free survival. The evidence in this review is limited by imprecision and incompleteness of reported relevant outcomes and therefore the results should be interpreted with caution. Future well-designed RCTs are required as this is...
Source: Cochrane Database of Systematic Reviews - Category: General Medicine Authors: Tags: Cochrane Database Syst Rev Source Type: research
Since the Women's Health Initiative (WHI) has been stopped 2002 due to increased risk of venous thromboembolism, myocardial infarction, stroke and breast cancer, safety issues have got great concern using hormone replacement therapy (HRT). However, using lower dosages, other hormonal components and/or transdermal instead of oral application can reduce those risks although not demonstrated in a placebo-controlled study comparable to WHI. However, this has been shown in large case/control- and cohort-studies reflecting more practical conditions in contrast to WHI.
Source: Maturitas - Category: Primary Care Authors: Tags: INV65 Source Type: research
Conclusions: Although our results must be cautiously interpreted given small numbers within subgroups, they raise concern and emphasize the need for further evaluation on breast cancer risk of the increasingly common exposure to both oral contraceptives and hormone replacement therapy.
Source: Menopause - Category: OBGYN Tags: Commemorative Papers Source Type: research
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Source: Menopause - Category: OBGYN Tags: Clinical Corner: Invited Review Source Type: research
Abstract Insofar as altered estrogen receptor-progesterone receptor (PR) expression contribute to breast cancer pathogenesis, previous studies examined the association of genetic variation in PR gene (PGR) with breast cancer, but with mixed outcome. We evaluated the association between PGR variants, and breast cancer and associated features. A retrospective case-control study involving 183 female breast cancer patients, and 222 control women. PGR genotyping was done by real-time PCR. Minor allele frequencies of rs1042838, rs590688, and rs10895068 PGR gene polymorphisms were significantly higher in breast cancer pa...
Source: Pathology Oncology Research - Category: Pathology Authors: Tags: Pathol Oncol Res Source Type: research
Conclusions: Female sex hormones are important for the preservation of lung function in middle aged women. The accelerated lung function decline with menopause is likely caused by decreasing estrogen levels.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Epidemiology Source Type: research
Breast cancer is the most frequent cancer among women especially in the Western world where, despite improved survival, it is one of the leading causes of death (1). Furthermore, for several decades there has been an increase in incidence, though recently there seems to be a stabilization in risk or even a small decline in typical high-risk areas such as Europe and the USA but at the same time a steep increase in typical low-risk societies such as Japan (2). Breast cancer is often regarded as a singular disease, but recent discoveries are pointing to a variety of types of potentially different etiology. Thus, the female...
Source: Scandinavian Journal of Work, Environment and Health - Category: Occupational Health Tags: Editorial Source Type: research
Conclusion: These data indicate that TBBPA, triclosan, and BPA interact in vivo, consistent with evidence that TBBPA and triclosan inhibit enzymes that are critical for BPA and E2 metabolism. https://doi.org/10.1289/EHP1329 Received: 04 November 2016 Revised: 11 April 2017 Accepted: 13 April 2017 Published: 21 August 2017 Address correspondence to D. deCatanzaro, Dept. of Psychology, Neuroscience &Behaviour, McMaster University, 1280 Main St. West, Hamilton ON L8S 4K1, Canada. Telephone: (905) 525-9140, ext. 23014. Email: decatanz@mcmaster.ca Supplemental Material is available online (https://doi.org/10.1289/EHP1...
Source: EHP Research - Category: Environmental Health Authors: Tags: Research Source Type: research
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