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Transcriptional profiling of the cardiac left ventricle during pregnancy and the early post-partum period

ABSTRACT: Comparative analysis was done to identify genes and pathways affected in the heart left ventricle during different stages of pregnancy. Microarray profiling was done on nonpregnant, pregnant, and early post-partum mice, with diestrus females serving as reference.

ORGANISM(S): Mus musculus

PROVIDER: GSE114324 | GEO | 2019/04/30

REPOSITORIES: GEO

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Project description:IntroductionDespite widespread success in reducing vertical HIV transmission, most antenatal care (ANC) programmes in eastern and southern Africa have not emphasized primary prevention of maternal HIV acquisition during pregnancy and lactation/breastfeeding. We hypothesized that combination HIV prevention interventions initiated alongside ANC could substantially reduce maternal HIV incidence.MethodsWe constructed a multi-state model describing male-to-female HIV transmission in steady heterosexual partnerships during pregnancy and lactation/breastfeeding, with initial conditions based on population distribution estimates for Malawi and Zambia in 2020. We modelled individual and joint increases in three HIV prevention strategies at or soon after ANC initiation: (1) HIV testing of male partners, resulting in HIV diagnosis and less condomless sex among those with previously undiagnosed HIV; (2) initiation (or re-initiation) of suppressive antiretroviral therapy (ART) for male partners with diagnosed but unsuppressed HIV; and (3) adherent pre-exposure prophylaxis (PrEP) for HIV-negative female ANC patients with HIV-diagnosed or unknown-status male partners. We estimated the percentage of within-couple, male-to-female HIV transmissions that could be averted during pregnancy and lactation/breastfeeding with these strategies, relative to base-case conditions in which 45% of undiagnosed male partners become newly HIV diagnosed via testing, 75% of male partners with diagnosed but unsuppressed HIV initiate/re-initiate ART and 0% of female ANC patients start PrEP.ResultsIncreasing uptake of any single strategy by 20 percentage points above base-case levels averted 10%-11% of maternal HIV acquisitions during pregnancy and lactation/breastfeeding in the model. Joint uptake increases of 20 percentage points in two interventions averted an estimated 19%-23% of transmissions, and with a 20-percentage-point increase in uptake of all three interventions, 29% were averted. Strategies achieving 95% male testing, 90% male ART initiation/re-initiation and 40% female PrEP use reduced incident infections by 45%.ConclusionsCombination HIV prevention strategies provided alongside ANC and sustained through the post-partum period could substantially reduce maternal HIV incidence during pregnancy and lactation/breastfeeding in eastern and southern Africa.

Project description:ObjectivesHealth care professionals and the health care environment play a central role in protecting pregnant and post-partum women and their infants from smoking-related harms. This study aimed to better understand the health professional's perspective on how interactions between women, health care professionals, and the environment influence how smoking is managed.DesignSemi-structured interviews and focus groups.MethodsData were from 48 health care staff involved in antenatal or post-partum care at two UK sites, including midwives, obstetricians, health visitors, GPs, pharmacists, service commissioners, and Stop Smoking Service (SSS) advisors and managers. Thematic analysis was guided by a social-ecological framework (SEF).ResultsThemes were divided across three SEF levels and represented factors connected to the management of smoking in the health care context and the beliefs and behaviour of pregnant or post-partum smokers. Organizational level: Service reconfigurations, 'last resort' nicotine replacement therapy prescribing policies, and non-mandatory training were largely negative factors. There were mixed views on opt-out referral pathways and positive views on carbon monoxide monitoring. Interpersonal level: Protection of client-professional relationships often inhibited frank discussions about smoking, and weak interservice relationships affected SSS referral motivation and quality. Individual level: Professionals felt community midwives had primary responsibility for managing smoking, although midwives felt underskilled doing this. Midwives' perceived priority for addressing smoking was influenced by the demands from unrelated organizational initiatives.ConclusionsOpportunities to improve clinical support for pregnant smokers exist at organizational, interservice, and health care professional levels. Interactions between levels reflect the importance of simultaneously addressing different level-specific barriers to smoking cessation in pregnancy. Statement of contribution What is already known on this subject? Few health care professionals discuss smoking cessation support with pregnant or post-partum women. Identified health care professional-related barriers to supporting pregnant and post-partum women to stop smoking include deficits in knowledge and confidence, perceived lack of time, and concerns about damaging client relationships. There is currently a gap in understanding regarding the barriers and facilitators to supporting this group and how interactions between the health care environment and health care professionals influence the way smoking is addressed. What does this study add? This study identifies modifiable factors that can influence cessation support delivery to pregnant and post-partum women. These factors are mapped across organizational, interpersonal, and individual health care professional levels. Service structure, communication pathways, and policies appear to influence what cessation support is offered. Interpersonal and individual factors influence how this support is delivered.

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Transcriptional profiling of the cardiac left ventricle during pregnancy and the early post-partum period

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