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1.
Am J Perinatol ; 2024 May 02.
Artigo em Inglês | MEDLINE | ID: mdl-38698597

RESUMO

OBJECTIVE: The primary objective was to determine if vaginal progesterone following cerclage for cervical length <10 mm or cervical dilation in patients without a history of spontaneous preterm birth (sPTB) decreased the risk of preterm birth at <34 weeks' gestation compared with cerclage alone. Secondary objectives were to determine if vaginal progesterone following cerclage (1) decreased the risk of preterm birth at <24, <28, and <37 weeks' gestation and (2) increased the latency period from cerclage placement to delivery compared with treatment with cerclage alone. STUDY DESIGN: Multicenter retrospective cohort study from 2015 to 2020 of singleton pregnancies, without prior sPTB, who had cerclage placement <24 weeks' gestation for cervical length <10 mm or cervical dilation. Exposure defined as cerclage plus vaginal progesterone postoperatively (dual therapy) and unexposed as cerclage alone (monotherapy), based on surgeon preference. RESULTS: We included 122 patients, 78 (64%) treated with dual therapy and 44 (36%) treated with monotherapy. In the crude analysis, dual therapy was associated with a lower risk of delivery at <28 weeks' gestation (13%) compared with monotherapy (34%; crude risk ratio: 0.38 [95% confidence interval, CI: 0.19-0.75]). When adjusted for preoperative vaginal progesterone, results were attenuated (adjusted risk ratio: 0.45 [95% CI: 0.20-1.01]). In both the crude and adjusted analyses, the risk of sPTB was not statistically different at <24, <34 or <37 weeks' gestation. Dual therapy was associated with a greater pregnancy latency from cerclage to delivery (16.3 vs. 14.4 weeks; p = 0.04), and greater gestational age at delivery (37.3 vs. 35.8 weeks' gestation; p = 0.02) compared with monotherapy. CONCLUSION: While not statistically significant, the risk of sPTB was lower at all gestational ages studied in patients treated with dual therapy compared with monotherapy. Dual therapy was associated with longer pregnancy latency and greater gestational age at delivery compared with monotherapy. KEY POINTS: · Dual therapy did not decrease preterm birth risk compared with monotherapy.. · Dual therapy prolonged pregnancy compared with monotherapy.. · Dual therapy can be considered but further studies are needed..

2.
J Phycol ; 60(2): 299-307, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38433431

RESUMO

Gomphonema parvulum is a cosmopolitan freshwater diatom that is used as an indicator in water quality biomonitoring. In this study, we report the culturing of two geographically separated isolates from southeastern North America, their morphology, and the sequencing and assembly of their mitochondrial and chloroplast genomes. Morphologically, both strains fit G. parvulum sensu lato, but the frustules from a protected habitat in South Carolina were smaller than those cited in the historic data of this species from the same location as well as a second culture from Virginia. Phylogenetic analyses using the rbcL gene placed both within a clade with G. parvulum. Genetic markers, including full chloroplast and mitochondrial genomes and the nuclear small subunit rRNA gene region were assembled from each isolate. The organellar genomes of the two strains varied slightly in size due to small differences in intergenic regions with chloroplast genomes of 121,035 bp and 121,482 bp and mitochondrial genomes of 34,639 bp and 34,654 bp. The intraspecific pairwise identities of the chloroplast and mitochondrial genomes of these two isolates were 97.9% and 95.4%, respectively. Multigene phylogenetic analysis demonstrated a close relationship between G. parvulum, Gomphoneis minuta, and Didymosphenia geminata.


Assuntos
Diatomáceas , Genoma de Cloroplastos , Genoma Mitocondrial , Filogenia , Diatomáceas/genética , South Carolina , Virginia , Cloroplastos/genética
3.
Health Educ Res ; 39(3): 197-211, 2024 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-38244588

RESUMO

Sexual violence is common on US college campuses and can result in negative health and academic outcomes. Credit-bearing courses are a possible innovative intervention, but few have been studied, and little is known about enrolled students' experiences. Our institution, located in the Southern United States, developed a semester-long class as a curricular intervention after our institutional climate survey results showed high rates of sexual violence among undergraduate students. Students enrolled in the course wrote a final reflection paper on what they found meaningful about the class (N = 62). Qualitative conventional content analysis was used to examine what students found most salient. Three overarching categories emerged: course content, course delivery and course impact, each with multiple themes. For course content, students wrote about 22 different topics from the class. For course delivery, students discussed the open forum to discuss sexuality, the importance of taking the course in their first year of college and the course structure. For course impact, students discussed gaining new knowledge, questioning prior assumptions, experiencing personal transformation and feeling empowered to act. Results indicated that students had a powerful class experience and that this kind of educational intervention has the potential to positively impact enrolled students.


Assuntos
Delitos Sexuais , Estudantes , Humanos , Universidades , Delitos Sexuais/prevenção & controle , Feminino , Estudantes/psicologia , Masculino , Adulto Jovem , Currículo , Adolescente , Pesquisa Qualitativa , Adulto
4.
Breastfeed Med ; 18(10): 790-793, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37733281

RESUMO

Background: Research on race/ethnicity and breastfeeding has consistently found lower rates for Black mothers compared with other U.S. women, due to various social, cultural, and historical factors. Aggregate analyses illuminate racial/ethnic differences, but they only provide partial insight into the factors contextualizing breastfeeding decisions and rates. We examined articles addressing Black women and breastfeeding (1980-2020) to assess publication trends. Materials and Methods: A targeted literature search in PubMed for research on Black women and breastfeeding (1980-2020). The search used nine different keyword combinations: ("breastfeeding" OR "lactation" OR "infant feeding,") AND ("rac*" OR "African American" OR "Black"). After removing duplicates, non-U.S. research, and irrelevant articles, 221 articles were reviewed. Articles were coded for year, type (quantitative, qualitative, mixed method, conceptual/literature review, commentary/editorial), and journal target audience (e.g., nursing). Results: More than 50% of all articles were published after 2013. The period of 2018-2020 accounts for 25% of all published articles. The research is also mostly quantitative (60.2%). Qualitative studies made up only 16.7% of articles. A few studies used mixed methods (5%). More than half of all qualitative studies were published after 2014. Conclusions: Research on Black women and breastfeeding has slowly increased since 1980, but much of the work has only been done post-2000. Research is also mostly quantitative analyses. Quantitative and qualitative methods rely on different research aims, styles, and objectives. To provide a fuller understanding of Black women's relationship to and experience of breastfeeding, we suggest that scholars cultivate a stronger focus on qualitative and mixed methods for future research.


Assuntos
Aleitamento Materno , Mães , Feminino , Humanos , Lactente , Negro ou Afro-Americano , Aleitamento Materno/etnologia , Etnicidade , Pesquisa Qualitativa
5.
J Gynecol Obstet Hum Reprod ; 52(9): 102652, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37633360

RESUMO

BACKGROUND: Soft markers of aneuploidy are common findings on obstetric ultrasounds but disclosure often increases patient anxiety. It is unknown whether communication training affects patient experience of soft marker disclosure. Our objective was to evaluate clinician experience of a simulation-based communication workshop and assess workshop influence on patient anxiety, understanding, and perception of communication quality. METHODS: We implemented a communication workshop for clinicians at an academic institution in 2019, and assessed clinician anxiety and confidence with counseling before and after. To assess effect of the workshop on patients, we surveyed pregnant people before and after workshop implementation for whom an echogenic intracardiac focus, choroid plexus cyst, or urinary tract dilation was identified. The primary outcome was anxiety. Some respondents completed a semi-structured interview. Interviews were analyzed using thematic analysis. RESULTS: Twelve clinicians participated. Twenty-one out of 49 eligible patients (43%) completed a survey before the workshop and 40 out of 90 eligible patients (44%) completed a survey after. The risk of high anxiety after was similar to before the workshop (aRR 1.7, 95% CI 0.6-4.2). Twenty patients were recruited for an interview. Qualitative analysis revealed that patients' backgrounds, emotional impact of the conversation and clinician manner influenced perception of communication quality. CONCLUSION: While a single clinician workshop did not affect patient anxiety, clinician manner and personalization play a large role in perception of counseling about soft markers of aneuploidy.


Assuntos
Comunicação , Emoções , Gravidez , Feminino , Humanos , Ansiedade , Aconselhamento , Aneuploidia
6.
Cell Rep ; 42(9): 113042, 2023 09 26.
Artigo em Inglês | MEDLINE | ID: mdl-37651233

RESUMO

Amplified lysosome activity is a hallmark of pancreatic ductal adenocarcinoma (PDAC) orchestrated by oncogenic KRAS that mediates tumor growth and metastasis, though the mechanisms underlying this phenomenon remain unclear. Using comparative proteomics, we found that oncogenic KRAS significantly enriches levels of the guanine nucleotide exchange factor (GEF) dedicator of cytokinesis 8 (DOCK8) on lysosomes. Surprisingly, DOCK8 is aberrantly expressed in a subset of PDAC, where it promotes cell invasion in vitro and in vivo. DOCK8 associates with lysosomes and regulates lysosomal morphology and motility, with loss of DOCK8 leading to increased lysosome size. DOCK8 promotes actin polymerization at the surface of lysosomes while also increasing the proteolytic activity of the lysosomal protease cathepsin B. Critically, depletion of DOCK8 significantly reduces cathepsin-dependent extracellular matrix degradation and impairs the invasive capacity of PDAC cells. These findings implicate ectopic expression of DOCK8 as a key driver of KRAS-driven lysosomal regulation and invasion in pancreatic cancer cells.


Assuntos
Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Humanos , Citocinese , Expressão Ectópica do Gene , Proteínas Proto-Oncogênicas p21(ras)/genética , Proteínas Proto-Oncogênicas p21(ras)/metabolismo , Neoplasias Pancreáticas/patologia , Fatores de Troca do Nucleotídeo Guanina/genética , Fatores de Troca do Nucleotídeo Guanina/metabolismo , Carcinoma Ductal Pancreático/patologia , Lisossomos/metabolismo
7.
Health Promot Pract ; 24(2): 323-331, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-34743629

RESUMO

Sexual violence is a major problem on college campuses, and innovative solutions are needed. Our university created a semester-long, credit-bearing, academic course as a curricular intervention intended to reduce sexual violence on campus. In this article, we describe the multiple methods used to evaluate the course, including a pre-post online survey with a quasi-experimental design, a qualitative content analysis of student reflection papers, and semistructured interviews with previously enrolled students conducted by a peer interviewer 3 months after course completion. The synthesis of evaluation findings indicated that an academic course has the potential to positively affect campus climate around sexual violence. Furthermore, using multiple methods enabled us to create a theory of change that illustrates how key course components shaped students' knowledge, attitudes, and behaviors about sexual violence, thereby ideally generating campus change. Results have been used by various stakeholders for both practice-based and scholarly purposes. We provide lessons learned and implications for practice that are transferable to other multimethod curricular intervention evaluations regardless of topical focus, including the many ways in which using multiple methods added value to the study; the considerable investment of time and resources needed when using multiple methods; the challenges that can arise when integrating findings across methods; the major benefits of having a multidisciplinary research team consisting of faculty and students; and the need to engage in critical reflexivity.


Assuntos
Delitos Sexuais , Humanos , Universidades , Delitos Sexuais/prevenção & controle , Inquéritos e Questionários , Estudantes
8.
South Med J ; 115(12): 893-898, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36455897

RESUMO

OBJECTIVES: Studies have shown that quality of care affects patient health outcomes and well-being. In this study, we examine the relationship between perceived quality of prenatal care, birth outcomes, and postpartum depression (PPD). METHODS: We use data from the third wave of the Listening to Mothers dataset (2013). After removing missing data, the analytic sample size included 2168 women. Through linear and logistic regression analyses, we test the following hypotheses: higher perceived quality of prenatal care will have a positive association with a likelihood of vaginal delivery and normal birth weight outcomes, and a negative association with a likelihood of preterm birth; and higher perceived quality of prenatal care will have a negative association with a likelihood of PPD risk. RESULTS: Women who perceived higher quality of prenatal care were significantly less likely to have a preterm birth relative to women who reported lower quality care. Women who reported (any) medical jargon during their prenatal visits were less likely to have a normal birth weight baby. Women who reported provider use of medical jargon, lower perceived quality of interaction with a prenatal care provider, and lower perceived quality of US maternity care in general were more likely to be at risk for PPD. CONCLUSIONS: Negative prenatal care experiences may exacerbate adverse patient outcomes. Positive prenatal care experiences may buffer/improve adverse outcomes. Quality of care measures were most consistently predictive of PPD outcomes. Providers should focus on improving the quality of prenatal care as one of the means to improve maternal and infant health and well-being.


Assuntos
Serviços de Saúde Materna , Nascimento Prematuro , Recém-Nascido , Lactente , Feminino , Gravidez , Humanos , Cuidado Pré-Natal , Nascimento Prematuro/epidemiologia , Peso ao Nascer , Mães , Avaliação de Resultados em Cuidados de Saúde
9.
Violence Against Women ; : 10778012221132300, 2022 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-36310436

RESUMO

Campus sexual violence is prevalent and consequential. After a climate survey at our university revealed high rates of sexual violence, a semester-long academic course was designed as a curricular intervention for first-year students. This study examines an assignment completed at the beginning and end of the course. Students were asked: "What are the root causes of sexual violence?" Thematic analysis of papers revealed that many students altered or expanded their thinking to more complex, structural factors compared to their initial perceptions. An academic course may broaden students' understanding of the determinants of sexual violence.

10.
Reprod Biomed Online ; 45(5): 961-969, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35953416

RESUMO

RESEARCH QUESTION: What is the association between polycystic ovary syndrome (PCOS) and pre-eclampsia? Data suggest that patients with PCOS are at increased risk of developing pre-eclampsia; however, several studies have not found an independent association between the two. DESIGN: A retrospective case-control study of singleton deliveries at a tertiary care hospital from 2011 to 2015. Patients with pre-eclampsia (cases) were matched to the next delivery without pre-eclampsia (controls) on gestational age week. Medical history data, a diagnosis or clinical features of PCOS and obstetric data, including pre-eclampsia, were abstracted from the medical record. Groups were compared with the chi-squared test, and conditional logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (95% CI). OR were adjusted for maternal age at delivery and race/ethnicity. RESULTS: This study included 435 cases and 435 controls. Cases were more likely to be Black compared with controls. Age, comorbidities, features of PCOS and use of IVF were similar between groups. Patients with pre-eclampsia were not more likely to have PCOS (8.3%) than those without pre-eclampsia (6.2%, adjusted OR 1.40, 95% CI 0.81-2.30). Sensitivity analyses for body mass index and parity suggested an increased pre-eclampsia risk for patients with PCOS and these additional factors, however no group showed a statistically significant association between PCOS and pre-eclampsia. CONCLUSIONS: In this study, a history of PCOS was not associated with the risk of pre-eclampsia. Further investigation is necessary to determine whether there are subgroups of PCOS patients who are at increased risk of pre-eclampsia.


Assuntos
Síndrome do Ovário Policístico , Pré-Eclâmpsia , Gravidez , Feminino , Humanos , Síndrome do Ovário Policístico/complicações , Síndrome do Ovário Policístico/epidemiologia , Pré-Eclâmpsia/epidemiologia , Pré-Eclâmpsia/etiologia , Estudos Retrospectivos , Estudos de Casos e Controles , Paridade , Fatores de Risco
11.
Open Forum Infect Dis ; 9(7): ofac186, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35791354

RESUMO

Background: Real-world data on the effectiveness of neutralizing casirivimab-imdevimab monoclonal antibody (Cas-Imd mAb) against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among high-risk patients may inform the response to future SARS-CoV-2 variants. Methods: This study covers an observational retrospective data analysis in Banner Health Care System sites, mainly in Arizona. During the study period, the prevalence of SARS-CoV-2 Delta variant was between 95% and 100%. Of 29 635 patients who tested positive for coronavirus disease 2019 (COVID-19) between 1 August 2021 and 30 October 2021, in the Banner Health Care System, the study cohort was split into 4213 adult patients who received Cas-Imd mAb (1200 mg) treatment compared to a PS-matched 4213 untreated patients. The primary outcomes were the incidence of all-cause hospitalization, intensive care unit (ICU) admission, and mortality within 30 days of Cas-Imd mAb administration or Delta variant infection. Results: Compared to the PS-matched untreated cohort, the Cas-Imd mAb cohort had significantly lower all-cause hospitalization (4.2% vs 17.6%; difference in percentages, -13.4 [95% confidence interval {CI}, -14.7 to -12.0]; P < .001), ICU admission (0.3% vs 2.8%; difference, -2.4 [95% CI, -3.0 to -1.9]; P < .001), and mortality (0.2% vs 2.0%; difference, -1.8 [95% CI, -2.3 to -1.3]; P < .001) within 30 days. The Cas-Imd mAb treatment was associated with lower rate of hospitalization (hazard ratio [HR], 0.22 [95% CI, .19-.26]; P < .001) and mortality (HR, 0.11 [95% CI, .06-.21]; P < .001). Conclusions: Cas-Imd mAb treatment was associated with a lower hospitalization rate, ICU admission, and mortality within 30 days among patients infected with the SARS-CoV-2 Delta variant.

12.
Matern Child Health J ; 26(1): 185-192, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35020085

RESUMO

OBJECTIVES: Lead exposure has devastating neurologic consequences for children and may begin in utero. The American College of Obstetricians and Gynecologists recommends prenatal lead screening using a risk factor-based approach rather than universal blood testing. The clinical utility of this approach has not been studied. We evaluated a risk-factor based questionnaire to detect elevated blood lead levels in pregnancy. METHODS: We performed a secondary analysis of a cohort of parturients enrolled to evaluate the association of lead with hypertensive disorders of pregnancy. We included participants in this analysis if they had a singleton pregnancy ≥ 34 weeks' gestation with blood lead levels recorded. Participants completed a lead risk factor survey modified for pregnancy. We defined elevated blood lead as ≥ 2 µg/dL, as this was the clinically reportable level. RESULTS: Of 102 participants enrolled in the cohort, 92 had blood lead measured as part of the study. The vast majority (78%) had 1 or more risk factor for elevated lead using the questionnaire yet none had clinical blood lead testing during routine visits. Only two participants (2.2%) had elevated blood lead levels. The questionnaire had high sensitivity but poor specificity for predicting detectable lead levels (sensitivity 100%, specificity 22%). CONCLUSIONS FOR PRACTICE: Prenatal risk-factor based lead screening appears underutilized in practice and does not adequately discriminate between those with and without elevated blood levels. Given the complexity of the risk factor-based approach and underutilization, the benefit and cost-effectiveness of universal lead testing should be further explored.


Assuntos
Hipertensão , Chumbo , Criança , Feminino , Idade Gestacional , Humanos , Programas de Rastreamento , Gravidez , Fatores de Risco
13.
Birth ; 49(3): 455-463, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35060175

RESUMO

BACKGROUND: Postpartum depression (PPD) and related maternal mood disorders affect anywhere from 7% to 19% of postpartum women. Although historically a neglected issue, there has been a strong impetus in the past few decades to implement routine, universal screening and to address PPD as a major public health concern. Still, there has been relatively little analysis of how the quality of the birth experience influences subsequent maternal mental health. We examine the relationship between perceived birth experience and two PPD screeners (Edinburgh Postnatal Depression Scale and Postpartum Depression Screening Scale). METHODS: Data came from waves I and II of the Listening to Mothers data set. This is the only national survey of US women's childbirth and postpartum experiences. In logistic and linear regression models, we used a 12-item "feeling" index (perceived birth experience) to predict (a) overall PPD screener scores, and (b) likelihood of meeting the clinical cutoff for depression risk. We also controlled for other known socio-demographic and obstetric risk factors. RESULTS: Perceived birth experience strongly and consistently predicted both PPD screener measures, and in both forms-raw scores and clinical cutoffs. By contrast, other known risk factors had inconsistent results across the two screeners. DISCUSSION: Perceived birth experience should be considered more central in assessing PPD. It may also be more robust than the PPD screeners used in practice, and therefore, could be a more reliable predictor of PPD. Providers should consider how the improved social-psychological quality of women's birth experience can act as a buffer to PPD and other postpartum concerns.


Assuntos
Depressão Pós-Parto , Depressão , Depressão Pós-Parto/diagnóstico , Depressão Pós-Parto/epidemiologia , Depressão Pós-Parto/psicologia , Feminino , Humanos , Mães/psicologia , Parto , Período Pós-Parto/psicologia , Gravidez , Fatores de Risco
14.
Int J Gynaecol Obstet ; 156(3): 481-487, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34196980

RESUMO

OBJECTIVE: The fetal risks and benefits of antihypertensives to treat gestational hypertension in pregnancy are understudied, particularly in low- and middle-income countries. METHODS: We performed a nested case-control study within a retrospective cohort of obstetrical patients in Botswana from 2014 to 2019. We included women carrying singletons who developed new onset non-severe hypertension (140-159 mm Hg systolic or 90-109 mm Hg diastolic blood pressure) after 20 weeks of pregnancy. Cases were defined as women with either small-for-gestational-age (SGA) infants or stillbirth, analyzed separately; controls were otherwise similar women without the adverse outcome in each analysis. RESULTS: We identified 1932 cases of SGA (7925 controls) and 316 cases of stillbirth (9619 controls). Cases with SGA were more likely to have used an anti-hypertensive than controls (33% vs 29%, adjusted odds ratio [aOR] 1.28, 95% confidence interval [CI] 1.15-1.43). Cases with stillbirth were more likely to have used an anti-hypertensive than controls (42% versus 29%, aOR 1.45, 95% CI 1.14-1.83). CONCLUSION: Anti-hypertensive use for new-onset gestational hypertension was associated with an increased risk of having an SGA infant or a stillbirth among women who never developed severe hypertension. These data support conduct of a randomized clinical trial to determine the appropriate use of anti-hypertensives in non-severe gestational hypertension.


Assuntos
Hipertensão Induzida pela Gravidez , Anti-Hipertensivos/efeitos adversos , Botsuana/epidemiologia , Estudos de Casos e Controles , Feminino , Humanos , Hipertensão Induzida pela Gravidez/tratamento farmacológico , Hipertensão Induzida pela Gravidez/epidemiologia , Lactente , Recém-Nascido , Recém-Nascido Pequeno para a Idade Gestacional , Gravidez , Estudos Retrospectivos
15.
Mol Biol Cell ; 32(15): 1393-1407, 2021 07 15.
Artigo em Inglês | MEDLINE | ID: mdl-34010028

RESUMO

The α-actinin family of actin cross-linking proteins have been implicated in driving tumor cell metastasis through regulation of the actin cytoskeleton; however, there has been little investigation into whether these proteins can influence tumor cell growth. We demonstrate that α-actinin 1 and 4 are essential for nutrient uptake through the process of macropinocytosis in pancreatic ductal adenocarcinoma (PDAC) cells, and inhibition of these proteins decreases tumor cell survival in the presence of extracellular protein. The α-actinin proteins play essential roles throughout the macropinocytic process, where α-actinin 4 stabilizes the actin cytoskeleton on the plasma membrane to drive membrane ruffling and macropinosome internalization and α-actinin 1 localizes to actin tails on macropinosomes to facilitate trafficking to the lysosome for degradation. In addition to tumor cell growth, we also observe that the α-actinin proteins can influence uptake of chemotherapeutics and extracellular matrix proteins through macropinocytosis, suggesting that the α-actinin proteins can regulate multiple tumor cell properties through this endocytic process. In summary, these data demonstrate a critical role for the α-actinin isoforms in tumor cell macropinocytosis, thereby affecting the growth and invasive potential of PDAC tumors.


Assuntos
Actinina/metabolismo , Carcinoma Ductal Pancreático/metabolismo , Neoplasias Pancreáticas/metabolismo , Pinocitose , Citoesqueleto de Actina/metabolismo , Carcinoma Ductal Pancreático/fisiopatologia , Linhagem Celular Tumoral , Endossomos , Humanos , Neoplasias Pancreáticas/fisiopatologia
16.
Pregnancy Hypertens ; 25: 12-17, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34020330

RESUMO

OBJECTIVES: Ischemic placental disease (IPD), including preeclampsia, abruption, and fetal growth restriction, often recurs in subsequent pregnancies. Angiogenic factors of placental origin have been implicated in the pathogenesis of preeclampsia, but have not been studied as predictors of IPD in subsequent pregnancies. We hypothesized that elevated angiogenic factors in an index pregnancy would be associated with recurrence of IPD. STUDY DESIGN: We conducted a retrospective cohort study of patients undergoing evaluation for preeclampsia who had angiogenic factors measured in an index pregnancy and experienced a subsequent pregnancy at the same institution. Patients with IPD in the index pregnancy were included. A high ratio of soluble fms-like tyrosine kinase 1 (sFlt1) and placental growth factor (PlGF) was defined as greater than or equal to 85. MAIN OUTCOME MEASURES: The primary outcome was IPD in a subsequent pregnancy. RESULTS: We included 109 patients in the analysis. The sFlt1/PlGF ratio was elevated in 30% of participants. Those with an elevated ratio were more likely to be nulliparous in the index pregnancy, and less likely to have chronic hypertension. The recurrence of IPD in the study was 27%, with a non-significant difference in risk based on a high sFlt-1/P1GF ratio RR 0.58 (95% CI 0.21 - 1.6) compared to a low ratio. CONCLUSIONS: A high sFlt1/P1GF ratio in an index pregnancy is not associated with a higher risk of IPD in a subsequent pregnancy. These data suggest placental angiogenic biomarkers are specific to the pregnancy and not a reflection of maternal predisposition to IPD.


Assuntos
Indutores da Angiogênese/sangue , Doenças Placentárias/sangue , Pré-Eclâmpsia/sangue , Adulto , Feminino , Número de Gestações , Humanos , Doenças Placentárias/diagnóstico , Fator de Crescimento Placentário/sangue , Pré-Eclâmpsia/diagnóstico por imagem , Gravidez , Recidiva , Estudos Retrospectivos , Fatores de Risco , Receptor 1 de Fatores de Crescimento do Endotélio Vascular/sangue
17.
PLoS One ; 16(3): e0248111, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33740019

RESUMO

The process by which tumor cells mechanically invade through the surrounding stroma into peripheral tissues is an essential component of metastatic dissemination. Matrix metalloproteinase (MMP)-mediated extracellular matrix (ECM) degradation plays an important role in this invasive process. Defining the contribution and interaction between these MMPs during invasion remains a key interest in the development of targeted anti-metastatic therapies. In this study we have utilized multiple different stromal fibroblasts and tumor cells to define the relative contributions between cancer cells and stromal cells during MMP-dependent matrix remodeling and pancreatic (PDAC) tumor cell invasion. We find that tumor cells co-cultured with the conditioned medium from stromal fibroblasts exhibited a substantial increase in invadopodial-based matrix degradation and transwell invasion. This increase is dependent on pro-MMP2 expressed and secreted by stromal fibroblasts. Further, the pro-MMP2 from the stromal fibroblasts is activated by MT1-MMP expressed on the tumor cells. Depletion of MT1-MMP, the known activator of MMP2, in tumor cells largely blocked matrix remodeling, even in the presence of stromal cell medium. In summary, these findings implicate an important interplay between MT1-MMP from tumor cells and MMP2 from fibroblasts as a key component for ECM remodeling and invasion.


Assuntos
Matriz Extracelular/patologia , Metaloproteinases da Matriz/metabolismo , Neoplasias Pancreáticas/patologia , Células Estromais/patologia , Linhagem Celular , Linhagem Celular Tumoral , Movimento Celular , Matriz Extracelular/metabolismo , Fibroblastos/metabolismo , Fibroblastos/patologia , Humanos , Invasividade Neoplásica/patologia , Neoplasias Pancreáticas/metabolismo , Células Estromais/metabolismo
18.
Pregnancy Hypertens ; 24: 7-12, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33618055

RESUMO

BACKGROUND: Elevated progesterone on the day of human chorionic gonadotropin (hCG) administration is associated with decreased live birth rates in IVF cycles. The association with adverse pregnancy outcomes is unknown. OBJECTIVES: Assess the association between serum progesterone on the day of hCG administration and the risk of ischemic placental disease [IPD; preeclampsia, placental abruption, and/or small for gestational age (SGA)]. METHODS: We conducted a retrospective cohort study of autologous fresh IVF cycles resulting in delivery between 2005 and 2018. All IVF procedures were conducted at a large, university-affiliated infertility center. Patients were divided into tertiles based on their serum progesterone level on the day of hCG administration; the lowest tertile served as the reference group. We identified pregnancies complicated by preeclampsia and placental abruption using ICD-9/10 codes and medical record review. We defined SGA as < 10th percentile using U.S. growth curves. RESULTS: The cohort included 166 deliveries in the lowest tertile of progesterone (0.2-0.73 ng/ml), 166 deliveries in the middle (0.64-1.05 ng/ml) and 167 deliveries in the highest tertile (1.05-5.6 ng/ml). Compared with the lowest tertile, the risk of IPD was greater in the middle (RR 1.6; 95% CI 1.1-2.5) tertile after adjustment for age, parity, number of oocytes retrieved, and estradiol. The highest tertile was also not associated with an increased risk of IPD. CONCLUSION: In an IVF population, elevated serum progesterone in the range of 0.64-1.05 ng/mL on the day of hCG administration was associated with a small increased risk of IPD.


Assuntos
Transferência Embrionária/métodos , Fertilização in vitro/efeitos adversos , Infertilidade Feminina/terapia , Indução da Ovulação/métodos , Doenças Placentárias/epidemiologia , Placenta/irrigação sanguínea , Progesterona/sangue , Adulto , Biomarcadores/sangue , Transferência Embrionária/efeitos adversos , Feminino , Humanos , Placenta/patologia , Doenças Placentárias/etiologia , Gravidez , Resultado da Gravidez , Taxa de Gravidez , Resultado do Tratamento
19.
Am J Obstet Gynecol ; 224(1): B2-B14, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33386103

RESUMO

Placenta accreta spectrum includes the full range of abnormal placental attachment to the uterus or other structures, encompassing placenta accreta, placenta increta, placenta percreta, morbidly adherent placenta, and invasive placentation. The incidence of placenta accreta spectrum has increased in recent years, largely driven by increasing rates of cesarean delivery. Prenatal detection of placenta accreta spectrum is primarily made by ultrasound and is important to reduce maternal morbidity associated with the condition. Despite a large body of research on various placenta accreta spectrum ultrasound markers and their screening performance, inconsistencies in the literature persist. In response to the need for standardizing the definitions of placenta accreta spectrum markers and the approach to the ultrasound examination, the Society for Maternal-Fetal Medicine convened a task force with representatives from the American Institute of Ultrasound in Medicine, the American College of Obstetricians and Gynecologists, the American College of Radiology, the International Society of Ultrasound in Obstetrics and Gynecology, the Society for Radiologists in Ultrasound, the American Registry for Diagnostic Medical Sonography, and the Gottesfeld-Hohler Memorial Ultrasound Foundation. The goals of the task force were to assess placenta accreta spectrum sonographic markers on the basis of available data and expert consensus, provide a standardized approach to the prenatal ultrasound evaluation of the uterus and placenta in pregnancies at risk of placenta accreta spectrum, and identify research gaps in the field. This manuscript provides information on the Placenta Accreta Spectrum Task Force process and findings.


Assuntos
Placenta Acreta/diagnóstico por imagem , Ultrassonografia Pré-Natal/métodos , Ultrassonografia Pré-Natal/normas , Cesárea/efeitos adversos , Cicatriz/diagnóstico por imagem , Feminino , Idade Gestacional , Ginecologia , Humanos , Obstetrícia , Placenta/diagnóstico por imagem , Placenta Acreta/epidemiologia , Gravidez , Sensibilidade e Especificidade , Sociedades Médicas , Estados Unidos , Útero/diagnóstico por imagem
20.
Am J Health Promot ; 35(3): 438-441, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33084379

RESUMO

PURPOSE: To evaluate whether a semester-long course for first-year undergraduates influenced knowledge, attitudes, and behavioral intentions about gender, sexuality, and sexual violence. DESIGN: Quasi-experimental survey design. SETTING: A private university in the Southeastern US. PARTICIPANTS: Undergraduates enrolled in an intervention (n = 49) or comparison (n = 60) course in Fall 2018. MEASURES: Sociosexual Orientation Inventory, Sexual Conservatism, Heteronormative Attitudes and Beliefs, Illinois Rape Myth Acceptance Scale, Bystander Efficacy Scale, Consent Myths, Sexual Misconduct Apathy, Campus Resource Awareness Index. ANALYSIS: A 2-way mixed-factorial ANOVA. RESULTS: Relative to the comparison group, students in the intervention course had significantly greater rates of change in reducing heteronormative views, decreasing sexual misconduct apathy, and increasing awareness of campus resources for sexual violence. CONCLUSION: A semester-long course targeting first-year undergraduates can potentially influence knowledge, attitudes, and behavioral intentions regarding sexual violence and create a more positive campus climate.


Assuntos
Estupro , Delitos Sexuais , Humanos , Illinois , Estudantes , Universidades
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