Social Media and Nutritional Guidelines in Pregnancy

INTRODUCTION

Nutrition impacts health outcomes of pregnant people and their fetuses. Discussing nutrition with patients may be challenging for health care providers. In this vacuum, patients use social media for health information during pregnancy. Little is known about the type and quality of nutrition information that is available on social media. The aim of this study was to qualitatively explore the pregnancy nutrition messages contained in social media videos for content and evaluate the information's concordance with evidence-based guidelines.

METHODS

A review of current social media video content for nutrition in pregnancy was conducted across 4 platforms: YouTube, Instagram, Facebook, and TikTok. Content analysis was used to descriptively and categorically analyze the social media video content.

RESULTS

In the 62 social media videos reviewed, most were not consistent with established guidelines, were inaccurate, or presented a homogenous and unrealistic image of the pregnant person. Four categories of nutrition in pregnancy social media information emerged: what to eat, what not to eat, what I ate: aspirational, and what I ate: rebellion. Few videos were produced by health care organizations. Some were produced by anonymous organizations, with the majority made by pregnant or postpartum people. Many were testimonial or confessional in style. Despite regulations requiring identification of paid posts and advertisements, it was difficult to discern if videos were authentic sharing of patient experiences or advertisements.

DISCUSSION

There is incorrect and incomplete information on social media surrounding nutrition in pregnancy. Professional guidelines for nutrition in pregnancy are available but are not as accessible to patients as social media videos. Social media use is associated with disordered eating and increased risk of anxiety and depression. However, targeted interventions by health care providers that use social media platforms have been successful in the distribution of credible health information. Midwives and other health care providers should share evidence-based nutrition recommendation with patients to facilitate meaningful conversations around nutrition in pregnancy during in person and online interactions.

Assessment of sexual and body esteem in postpartum women with or without perineal laceration: a cross-sectional study with cultural translation and validation of the Vaginal Changes Sexual and Body Esteem Scale

Objective

We aimed to translate and determine cultural validity of the Vaginal Changes Sexual and Body Esteem Scale (VSBE) for Brazilian Portuguese language in postpartum women who underwent vaginal delivery with or without perineal laceration and cesarean section.

Methods

A cross-sectional study conducted virtually, with online data collection through a survey with 234 postpartum women of 975 that were invited. Clinical, sociodemographic, and psychometric variables from the VSBE questionnaire were analyzed (content validity index, internal consistency, test-retest reliability, construct/structural and discriminant validity). Multivariate analysis was performed to explore associated factors with the presence of perineal laceration.

Results

One-hundred fifty-eight women experienced vaginal delivery, of which 24.79% had an intact perineum, 33.33% had perineal laceration, and 9.4% underwent episiotomy; and 76 participants had cesarean sections. Women with perineal laceration were older, presented dyspareunia and previous surgeries than women without perineal laceration (p<0.05). For VSBE, a high internal consistency (Cronbach's α > 0.7) was observed, but it did not correlate with Body Attractiveness Questionnaire and Female Sexual Function Index; however, it correlated with the presence of women sutured for perineal laceration. Moreover, VSBE presented good structural validity with two loading factors after exploratory factor analysis. VSBE also demonstrated discriminant validity between the presence or absence of perineal laceration. The presence of urinary incontinence (UI) (OR=2.716[1.015-4.667];p=0.046) and a higher VSBE total score (OR=1.056[1.037-1.075];p<0.001) were the only factors associated with perineal laceration.

Conclusion

Vaginal Changes Sexual and Body Esteem Scale demonstrated appropriate translation and good internal consistency, discriminant/construct validity and reliability. Vaginal Changes Sexual and Body Esteem Scale total score and presence of UI were associated with women that underwent perineal laceration.

Implementation of Healthy Men Healthy Communities: A Health Promotion and Gender-Based Violence Prevention Program for Male South Sudanese Refugees in Uganda

Men living in refugee settings are often exposed to violence, poverty, and social instability, which impacts physical and mental health and increases the risk of perpetrating sexual and gender-based violence. Healthy Men Healthy Communities was developed as a male-led health promotion program to address men's physical and mental health and their role in creating healthy relationships and families. Three community leaders from the settlements were trained to facilitate the program, which was implemented among six groups consisting of twelve men in each group. Pre/post surveys and feedback were collected among the facilitators and participants. Facilitators suggested culturally appropriate ways to present physical activities as a stress reduction technique and the importance of spacing out births. The small group setting facilitated open conversations on topics such as birth spacing and healthy partner communication. Participants experienced an increase in knowledge and confidence in practicing the program content, such as stress-reduction techniques and healthy communication strategies. Participants recommended additional topics such as fertility and sexually transmitted infections. The Healthy Men Healthy Communities program has the potential for wider implementation among male South Sudanese refugees to promote their health as well as the health of their families.

Improving health literacy through group antenatal care: results from a cluster randomized controlled trial in Ghana

BACKGROUND

Although the majority of Ghanaian women receive antenatal care (ANC), many exhibit low health literacy by misinterpreting and incorrectly operationalizing ANC messages, leading to poor maternal and newborn health outcomes. Prior research in low-resource settings has found group antenatal care (G-ANC) feasible for women and providers. This study aims to determine the effect of G-ANC on increasing maternal health literacy. We hypothesized that pregnant women randomized into G-ANC would exhibit a greater increase in maternal health literacy than women in routine, individual ANC.

METHODS

A 5-year cluster randomized controlled trial was conducted in 14 rural and peri-urban health facilities in the Eastern Region of Ghana. Facilities were paired based on patient volume and average gestational age at ANC enrollment and then randomized into intervention (G-ANC) vs. control (routine, individual ANC); 1761 pregnant women were recruited. Data collection occurred at baseline (T0) and post-birth (T2) using the Maternal Health Literacy scale, a 12-item composite scale to assess maternal health literacy. Logistic regression compared changes in health literacy from T0 to T2.

RESULTS

Overall, women in both the intervention and control groups improved their health literacy scores over time (p < 0.0001). Women in the intervention group scored significantly higher on 3 individual items and on overall composite scores (p < 0.0001) and were more likely to attend 8 or more ANC visits.

CONCLUSION

While health literacy scores improved for all women attending ANC, women randomized into G-ANC exhibited greater improvement in overall health literacy post-birth compared to those receiving routine individual care. Life-saving information provided during ANC must be presented in an understandable format to prevent women and newborns from dying of preventable causes.

TRIAL REGISTRY

Ethical approval for the study was obtained from the Institutional Review Boards of the University of Michigan (HUM#00161464) and the Ghana Health Service (GHS-ERC: 016/04/19).

Improving respectful maternity care through group antenatal care: findings from a cluster randomized controlled trial

Background

Disrespect and patient mistreatment are identified as barriers to care-seeking and low uptake of facility-based deliveries. These mitigating factors have led to slow progress in the achievement of maternal and child health targets, especially in Ghana. Group antenatal care, as an alternative to individual antenatal was implemented to explore the impact on outcomes, including mothers' perception of respectful care.

Methods

A cluster randomized controlled trial was conducted in 14 health facilities across four districts in the Easter Region of Ghana. These facilities were randomized to intervention or control using a matched pair. Data was collected at several timepoints: enrollment (Time 0), 34 weeks gestation to 3 weeks post-delivery (Time 1), 6 to 12 weeks post-delivery (Time 2), 5 to 8 months post-delivery (Time 3), and 11 to 14 months post-delivery (Time 4). Questions related to respectful care were asked at Time 2, while a focus group discussion (FGDs) was conducted as part of a process evaluation to examine participants' experiences about respectful maternity care.

Results

The findings from the intervention group indicate that participants perceived higher levels of respect in comparison to the control group. Privacy and con dentiality were maintained. They believed they had been provided with adequate information, education, and counseling, empowering them to make informed decisions. Participants perceived a shortened waiting time and reduced discrimination in care provision. Generally, there were higher levels of satisfaction with antenatal care.

Conclusion

The provision of respectful maternity care, which is essential to increasing healthcare utilization, has been demonstrated to correlate positively with group antenatal care.

"With group antenatal care, pregnant women know they are not alone": The process evaluation of a group antenatal care intervention in Ghana

BACKGROUND

An essential component to improving maternal and newborn outcomes is antenatal care. A trial of group antenatal care was implemented in Ghana where 7 health care facilities were randomized to be intervention sites and 7 control sites continued traditional antenatal care. Group antenatal care, where 10-14 women with similar due dates meet together for visits, includes traditional components such as risk assessment with increased opportunity for education and peer support. The study aim was to assess and report the process evaluation of the implementation of a group antenatal care intervention.

METHODS

Process evaluation data were collected alongside intervention data and included both quantitative and qualitative data sources. Midwives at the health facilities which were randomized as intervention sites completed tracking logs to measure feasibility of the intervention. Research team members traveled to intervention sites where they conducted structured observations and completed fidelity and learning methods checklists to determine adherence to the model of group antenatal care delivery. In addition, midwives facilitating group antenatal care meetings were interviewed and focus groups were conducted with women participating in group antenatal care.

RESULTS

In the majority of cases, midwives facilitating group antenatal care completed all components of the meetings with fidelity, following best practices such as sitting with the group rather than standing. Across 7 intervention sites, 7 groups (622 pregnant women) were documented in the tracking logs and of these participants, the majority (74%) attended more than half of the meetings, with 32% attending all 8 group meetings. Three themes were identified in both the midwife interviews and focus groups with pregnant women: 1) information sharing, 2) sense of community, and 3) time management challenges. An additional theme emerged from the focus groups with the women: women who had already given birth noticed a disconnect between what they learned and treatment received during labor and birth.

CONCLUSION

This process evaluation determined that group antenatal care can be implemented with fidelity in low and middle-income countries. Time management was the biggest challenge, however both midwives and pregnant women found the model of care not only acceptable, but preferable to traditional care. The knowledge shared and sense of community built during the meetings was a valuable addition to the individual model of antenatal care.

Measuring Fear of Childbirth Among a Diverse Population in the United States: A Revised Wijma Delivery Expectancy/Experience Scale (WDEQ-10)

INTRODUCTION

The current gold standard instrument used to measure fear of childbirth is the Wijma Delivery Expectancy/Experience Questionnaire (WDEQ). However, the existing scale is long, has translational challenges, and lacks data specific to experiences of a diverse population in the United States, making it challenging to assess how fear of childbirth impacts perinatal health care disparities. The objective of this study was to revise the WDEQ and analyze its reliability and validity for use in the United States.

METHODS

The questionnaire was revised using qualitative data from a previously published study of fear of childbirth within a racially, ethnically, and economically diverse group of pregnant or postpartum people in the United States. Psychometric properties were analyzed in terms of construct validity, reliability, and factor analysis from a group of 329 participants.

RESULTS

The revised and shortened 10 item WDEQ-10 comprises 3 subscales: fear of environmental factors, fear of death or injury, and fear of how they feel. The results indicate that the WDEQ-10 demonstrates good reliability and validity and confirmed the multidimensionality of fear of childbirth through a 3-factor solution.

DISCUSSION

The WDEQ-10 is a readable and accessible instrument that will allow health care providers and researchers to accurately measure complex components of how pregnant people experience fear of childbirth.

Knowledge, attitudes, and practices of healthcare professionals on oral care of pregnant women in Brunei Darussalam

OBJECTIVE

To examine nationwide the knowledge, attitudes, and practices of healthcare professionals on oral/dental care of pregnant women in Brunei Darussalam.

MATERIALS AND METHODS

A descriptive cross-sectional study conducted using an online survey of eligible healthcare professionals in all Government Maternal and Child Health Care Clinics, Dental Clinics and Obstetrics and Gynecological Clinics in four hospitals covering the whole of Brunei Darussalam. Participants were given seven days to complete the survey. Sub-group analysis using Chi-square test for independence and one-way Analysis of Variance (ANOVA) was used to determine the significant association between domains of oral care practices and demographic factors. P values less than 0.05 was considered statistically significant.

RESULTS

A total of 346 healthcare professionals participated in this online study. Most participants (94.3%) responded that they perceived oral health to be of high importance. However, less than two thirds of the participants (59.0%) included oral health questions during antenatal health assessments. Moreover, only 16.2% of participants frequently discussed the importance of oral care with their antenatal patients.

CONCLUSIONS

In this survey, most healthcare professionals viewed oral health to be of high importance for prenatal/antenatal patients. However, not all put those views into practice with regard to oral care in pregnant women.

Group Antenatal Care in Ghana: Protocol for a Cluster Randomized Controlled Trial

Background

While group antenatal care (ANC) has been delivered and studied in high-income countries for over a decade, it has only recently been introduced as an alternative to individual care in sub-Saharan Africa. Although the experimental design of the studies from high-resource countries have been scientifically rigorous, findings cannot be generalized to low-resource countries with low literacy rates and high rates of maternal and newborn morbidity and mortality. The Group Antenatal Care Delivery Project (GRAND) is a collaboration between the University of Michigan in the United States and the Dodowa Health Research Centre in Ghana. GRAND is a 5-year, cluster randomized controlled trial (RCT). Our intervention—group ANC—consists of grouping women by similar gestational ages of pregnancy into small groups at the first ANC visit. They then meet with the same group and the same midwife at the recommended intervals for care.

Objective

This study aims to improve health literacy, increase birth preparedness and complication readiness, and optimize maternal and newborn outcomes among women attending ANC at seven rural health facilities in the Eastern Region of Ghana.

Methods

Quantitative data will be collected at four time points using a secure web application for data collection and a database management tool. Data will be analyzed on an intention-to-treat basis to test the differences between the two arms: women randomized to group-based ANC and women randomized to routine individual ANC. We will conduct a process evaluation concurrently to identify and document patient, provider, and system barriers and facilitators to program implementation.

Results

The study was funded in September 2018. Recruitment and enrollment of participants and data collection started in July 2019. In November 2021, we completed participant enrollment in the study (n=1761), and we completed data collection at the third trimester in May 2022 (n=1284). Data collection at the additional three time points is ongoing: 6 weeks postpartum, 6 months postpartum, and 1 year postpartum.

Conclusions

This study is significant and timely because it is among the first RCTs to be conducted to examine the effects of group ANC among low-literacy and nonliterate participants. Our findings have the potential to impact how clinical care is delivered to low-literacy populations, both globally and domestically, to improve maternal and newborn outcomes.

Trial Registration

ClinicalTrials.gov NCT04033003; https://clinicaltrials.gov/ct2/show/NCT04033003

International Registered Report Identifier (IRRID)

DERR1-10.2196/40828

Perspectives of Doulas of Color on their Role in Alleviating Racial Disparities in Birth Outcomes: A Qualitative Study

INTRODUCTION

The purpose of this study was to explore how doulas of color conceptualize both their work and how their racial and ethnic identities influence their work within the context of racial disparities in birth outcomes in the United States.

METHODS

We conducted semistructured qualitative interviews with doulas of color who had attended at least 3 births as doulas. Participants were recruited from across the United States. The interviews were audio recorded and transcribed verbatim. Qualitative content analysis was used to derive themes from the transcribed interviews.

RESULTS

Interviews were conducted with 8 doulas of color, ranging in age from 21 to 47 from across the United States. All participants were either current college students or had earned a college degree. Although many of the doulas identified as being of more than one racial or ethnic group, nearly all participants identified closely with being Black or African American first, and their other racial groups second. Four major themes emerged: relationship with the medical system, role of identity in the doulas' work, role of class, and divisions within the natural birth movement.

DISCUSSION

The majority of doulas who participated in this study stated that their racial identity strongly influenced their work, particularly when working with women of the same race or ethnicity due to their shared identities. Several participants initially became doulas because of a desire to alleviate disparities in birth outcomes for women of color. This suggests a commitment on the part of the study participants to serving their communities and to bridging the gap between women of color and the health care system. Several participants also noted that they feel alienated by both the health care system and the mainstream natural birth community.

A pilot study to evaluate the effect of classroom-based high-fidelity simulation on midwifery students' self-efficacy in clinical lactation and perceived translation of skills to the care of the breastfeeding mother-infant dyad

BACKGROUND

Midwives are expected to provide timely and skilled support to breastfeeding mothers, yet it is not clear whether and how midwifery students receive training in clinical lactation. The primary objective of this pilot study was to evaluate the impact of a classroom-based breastfeeding simulation on nurse-midwifery students' self-efficacy in lactation skills. The secondary objective was to describe students' exposure to breastfeeding patients in the classroom and in clinical settings.

METHODS

A pilot study using a prospective cohort study design and convenience sampling was completed between September 2017 and April 2018. Two simulation-based workshops were developed for the classroom setting in alignment with breastfeeding-focused competencies for midwives and lactation professionals. The workshops were integrated into the nurse-midwifery curriculum at a US-based program. Two Self-Efficacy Surveys (defined, 7-point Likert Scale) were developed and used to measure baseline and continuing self-efficacy in breastfeeding skills among students. Two Practice Patterns instruments, adapted from the American Academy of Pediatrics breastfeeding curriculum, were used to define the setting, quantity, and types of nurse-midwifery students' breastfeeding-related exposures. Students participated in a one-hour focus group upon completion of the study.

RESULTS

In this pilot study, nurse-midwifery student participants (N = 9) reported a 14% increase (P < .0001) in their perceived self-efficacy in basic and advanced clinical lactation skills after completing both workshops. The nurse-midwifery students reported dozens of encounters with diverse breastfeeding patients over a six-month period during which they performed a wide variety of clinical lactation skills. The focus group revealed most students (n = 5/9) would like more time to practice clinical lactation skills in a simulated environment and some indicated a desire to have more exposure to challenging versus common (n = 2/9) of breastfeeding concerns.

CONCLUSIONS

In this work, we demonstrate the first high-fidelity lactation simulation in a classroom setting in a healthcare professional training program. Midwifery educators and researchers can adapt the framework and instruments presented in this pilot study to determine the effect of educational interventions on students' translation of skills to breastfeeding mother-infant dyads. Likewise, this is the first study to define the number and type of breastfeeding-related clinical exposures among nurse-midwifery students.

Midwifery students better approximate their self-efficacy in clinical lactation after reflecting in and on their performance in the LactSim OSCE

Background

Midwives are expected to support women with lactation initiation and maintenance. Midwifery students engaged in a simulation-based exercise (LactSim OSCE) where they role-played the clinician and the breastfeeding patient by wearing a high-fidelity breast model. We provided participants opportunities for reflecting in and on practice to compare their perceived self-confidence in clinical lactation skills to actual clinical performance. We also describe feasibility of implementing the LactSim OSCE with an emphasis on preparation and time spent on tasks during the OSCE.

Methods

Audio-video recordings from the LactSim OSCE were viewed and assessed using a technical skills checklist by an independent rater and by the study participants as part of the self-reflection. Mixed data on participants’ self-efficacy in clinical lactation, experience with the LactSim OSCE, and self-assessment of clinical performance were collected in survey instruments and a focus group. Time spent on each component and clinical lactation skill during the LactSim OSCE was documented.

Results

Immediately following the LactSim OSCE, participants’ confidence in clinical lactation was high (5.7/7), but after a guided video reflection exercise, their self-efficacy was 4.4/7. Participants spent approximately 2 of the allotted 10 min per case scenario discussing the OSCE logistics due to inadequate preparation. Participants spent approximately 2 min of the total encounter performing hands-on clinical lactation skills by touching, looking at, or using the high-fidelity breast model worn by their peer.

Conclusion

We described the development and evaluation of the first simulated experience in clinical lactation with all three components of fidelity: conceptual, psychological, and physical. Multiple opportunities for reflecting on performance allowed the nurse-midwifery students to evaluate their competence in decision-making, technical, and counseling skills which resulted in a more realistic approximation of their perceived self-confidence in breastfeeding skills. Another innovation of this pilot work is the documentation of how long a learner spends on various tasks relevant to lactation support in a simulated encounter. Our findings highlight the importance of providing multiple opportunities for self-reflection using guided video reflection and checklists for objective self-assessment in the clinical lactation field.

Timing and Outcomes of an Indication-Only Use of Intravenous Cannulation During Spontaneous Labor

INTRODUCTION

In the United States, most women presenting in spontaneous labor undergo intravenous (IV) cannulation on admission to hospital labor and birth units. There is limited evidence for this routine practice in pregnant women at low risk for adverse outcomes during labor or birth.

METHODS

A retrospective, exploratory, descriptive study of an indication-only practice of IV cannulation on admission for women presenting in spontaneous labor and cared for by a nurse-midwife service was performed. Descriptive data included the timing of IV cannula placement (admission, during labor or postpartum period, or not at all) and indications for placement. Maternal outcomes of interest were estimated blood loss, postpartum hemorrhage rates, and management; neonatal outcome was 5-minute Apgar scores.

RESULTS

Records for 1069 women cared for by nurse-midwives who presented in spontaneous labor were reviewed. In this cohort, 445 (41.6%) had IV access established on admission, 325 (30.4%) had an IV cannula placed during labor or postpartum, and 299 (28%) never had IV access during their hospital stay. For the 325 women with IV cannulas placed after admission, 25 (7.7%) were placed urgently for excessive postpartum bleeding. Further analysis of the subset of women who had a postpartum hemorrhage after vaginal birth (defined as >500 mL estimated blood loss) indicated that urgent IV cannulation was not associated with a lower mean postpartum hemoglobin or hematocrit or an increase in blood transfusion rate when compared with women who had an IV cannula placed earlier in their labor course.

DISCUSSION

Indication-only IV cannulation for women experiencing an uncomplicated labor and birth is a reasonable practice in settings where IV access can be established urgently if needed.

Determinants of postnatal care utilization in Tigray, Northern Ethiopia: A community based cross-sectional study

Introduction

Globally, 289,000 women die from complications related to pregnancy, childbirth, or the postnatal period every year. Two-thirds of all maternal deaths occur during the first six weeks following birth and more than two thirds of newborn deaths occur during the first week of life, These statistics underscore the importance of postnatal care, an often neglected service according to the World Health Organization (WHO). The purpose of this study was to assess the factors associated with postnatal service utilization in the Tigray region of Ethiopia.

Methods

The study was a community-based, cross-sectional study. A multi-stage sampling method was used to select study districts randomly from the entire region. A total of 1,690 participants were selected using systematic random sampling. Participants were 18–49 years old, had given birth within the last six months, and were residents of the district for at least six months. Using SPSS version 20 means, frequencies, and percentages were calculated for the sub-group of participants who did attend postnatal care. Barriers to non-attendance of postatal care were analyzed using descriptive statistics. Bivariate analysis was undertaken to assess the association between demographic, obstetric, and knowledge regarding PNC and attendance at antenatal care. Variables with a P value, <0.05 were included in the multivariate logistic regression analysis to identify the determinant factors of postnatal care utilization.

Result

Of the women surveyed, 132 (8%) obtained postnatal care. Women who did not receive postnatal care reported lack of awareness of the services (n = 1110, 73.3%). Most mothers who received postnatal care reported that they were aware of the service prior to the birth of their child (n = 101, 76.5%). Women were more likely to receive postnatal services if they lived in an urban area (odds ratio 1.96, 95% confidence interval 1.07, 3.59), had greater than a secondary education (OR 3.60, 95% CI 1.32,9.83), delivered by cesarean section (OR 2.88 95% CI 1.32,6.29), had four or more antenatal visits (OR 4.84, 95% CI 1.57,14.9), or had a planned pregnancy (OR 6.47, 95% CI 2.04,20.5).

Conclusion

Postnatal care service utilization is very low in Tigray region. Interventions targeted at increasing women’s awareness of the importance of postnatal services and improving accessibility, particularly in rural areas, is needed.

Factors influencing use of family planning in women living in crisis affected areas of Sub-Saharan Africa: A review of the literature

BACKGROUND

far too many women continue to die from pregnancy and childbirth related causes. While rates have decreased in the past two decades, some areas of the world such as sub-Saharan Africa continue to have very high maternal mortality rates. One intervention that has been demonstrated to decrease maternal mortality is use of family planning and modern contraception, yet rates of use in sub-Saharan countries with the highest rates of maternal death remain very low.

AIM

to review available research and summarize the factors that inhibit or promote family planning and contraceptive use among refugee women and women from surrounding areas living in Sub-Saharan Africa.

DESIGN

a review of the literature.

DATA SOURCES

Cochrane Library, Cumulative Index to Nursing and Allied Health Literature (CINAHL), OVID, power search, and PubMed databases.

REVIEW METHODS

studies included were: (1) published in English from 2007 to present; (2) primary research; and (3) focused on family planning and contraceptive use among refugee women and women in surrounding areas. Findings were discussed within the framework of the Interaction Model of Client Health Behavior.

FINDINGS

twelve studies met the inclusion criteria. Utilization of modern contraceptive methods was low. Women were socially influenced to avoid the use of contraceptives by husbands and others in the community. Reasons were a lack of trust in western medicine and the desire to have large families. Low socioeconomic status and proximity of family planning clinics were barriers to access. Women believed that health care providers were unqualified, many described being treated with disrespect in the health clinics. Knowledge and understanding of contraceptives was low; while most women knew different methods were available, there were many misconceptions. Believing that certain contraceptives cause death, infertility and side effects, contributed to fear of use. This lack of knowledge and fear, even with the desire to space and limit births, affected motivation to use contraception.

CONCLUSIONS

developing new approaches to educating women, men (husbands), community leaders as well as healthcare providers is needed to address the multi-factorial issues that contribute to underuse of family planning services, thus contraceptive use.

IMPLICATIONS FOR PRACTICE

while lack of access to family planning is a barrier to use, interventions that improve access must be affordable and include education regarding contraceptive methods, preferably from those within the community. However, education and access is not sufficient unless the issue of disrespect by healthcare providers is addressed. Respectful and culturally sensitive care for all women, regardless of socio-economic status or country of origin, must be provided by midwives and other women health providers.

Prevalence and Predictors of Breastfeeding After Childhood Abuse

OBJECTIVE

To describe the prevalence and predictors of breastfeeding intent and outcomes in women with histories of childhood maltreatment trauma (CMT), including those with posttraumatic stress disorder (PTSD).

DESIGN

Secondary analysis of a prospective observational cohort study of the effects of PTSD on perinatal outcomes.

SETTING

Prenatal clinics in three health systems in the Midwestern United States.

PARTICIPANTS

Women older than 18 years expecting their first infants, comprising three groups: women who experienced CMT but did not have PTSD (CMT-resilient), women with a history of CMT and PTSD (CMT-PTSD), and women with no history of CMT (CMT-nonexposed).

METHODS

Secondary analysis of an existing data set in which first-time mothers were well-characterized on trauma history, PTSD, depression, feeding plans, feeding outcomes, and several other factors relevant to odds of breastfeeding success.

RESULTS

Intent to breastfeed was similar among the three groups. Women in the CMT-resilient group were twice as likely to breastfeed exclusively at 6 weeks (60.5%) as women in the CMT-PTSD group (31.1%). Compared with women in the CMT-nonexposed group, women in the CMT-resilient group were more likely to exclusively breastfeed. Four factors were associated with increased likelihood of any breastfeeding at 6 weeks: prenatal intent to breastfeed, childbirth education, partnered, and a history of CMT. Four factors were associated with decreased odds of breastfeeding: African American race, PTSD, major depression, and low level of education (high school or less).

CONCLUSION

Posttraumatic stress disorder is more important than childhood maltreatment trauma history in determining likelihood of breastfeeding success. Further research on the promotion of breastfeeding among PTSD-affected women who have experienced CMT is indicated.

Body after baby: a pilot survey of genital body image and sexual esteem following vaginal birth

OBJECTIVE

The aim of this study was to determine acceptability of the Vaginal Changes Sexual and Body Esteem (VSBE) scale for women post childbirth and explore the association between childbirth events and sexual/body esteem.

DESIGN

This is a cross-sectional study within the Evaluating Maternal Recovery from Labor and Delivery study.

SETTING

This study was conducted in a community setting.

POPULATION

The study was conducted in women post first vaginal birth with birth events that posed risk factors for levator ani muscle tears.

METHODS

Survey, magnetic resonance images of levator ani, and physical examination were the data collected 8 months postpartum. Birth variables were collected by hospital chart review. Descriptive analysis of VSBE response rates and distribution of responses was conducted. An exploratory analysis of the potential association of demographic, birth, clinical, and magnetic resonance image characteristics with VSBE scores was conducted.

MAIN OUTCOME MEASURES

The outcome measure used in this study is VSBE scale.

RESULTS

The majority of participants (97%) completed the scale, with responses to most questions skewed toward positive sexual/body esteem, with the exception of sexual enjoyment, where 38% indicated some interference due to genital changes. The scale showed high internal consistency (alpha =0.93). In the exploratory analysis of potential characteristics associated with VSBE, women with episiotomies had lower sexual/body esteem compared to those who did not (median VSBE scores 35 vs 42.5, P=0.01). Anal sphincter tear was not associated with sexual/body esteem (P=0.78). Additional study is indicated to further explore observed trends toward the association of severe levator ani tear, maternal age at childbirth, and forceps with VSBE scores.

CONCLUSION

The VSBE is suitable for use to assess sexual/body esteem in women post childbirth. Most women in this sample did not indicate negative genital body image/sexual esteem. However, some indicated that the changes post birth negatively affected their sexual/body esteem, particularly those who had episiotomies.

Evaluating maternal recovery from labor and delivery: bone and levator ani injuries

OBJECTIVE

We sought to describe occurrence, recovery, and consequences of musculoskeletal (MSK) injuries in women at risk for childbirth-related pelvic floor injury at first vaginal birth.

STUDY DESIGN

Evaluating Maternal Recovery from Labor and Delivery is a longitudinal cohort design study of women recruited early postbirth and followed over time. We report here on 68 women who had birth-related risk factors for levator ani (LA) muscle injury, including long second stage, anal tears, and/or older maternal age, and who were evaluated by MSK magnetic resonance imaging at both 7 weeks and 8 months' postpartum. We categorized magnitude of injury by extent of bone marrow edema, pubic bone fracture, LA muscle edema, and LA muscle tear. We also measured the force of LA muscle contraction, urethral pressure, pelvic organ prolapse, and incontinence.

RESULTS

In this higher-risk sample, 66% (39/59) had pubic bone marrow edema, 29% (17/59) had subcortical fracture, 90% (53/59) had LA muscle edema, and 41% (28/68) had low-grade or greater LA tear 7 weeks' postpartum. The magnitude of LA muscle tear did not substantially change by 8 months' postpartum (P = .86), but LA muscle edema and bone injuries showed total or near total resolution (P < .05). The magnitude of unresolved MSK injuries correlated with magnitude of reduced LA muscle force and posterior vaginal wall descent (P < .05) but not with urethral pressure, volume of demonstrable stress incontinence, or self-report of incontinence severity (P > .05).

CONCLUSION

Pubic bone edema and subcortical fracture and LA muscle injury are common when studied in women with certain risk factors. The bony abnormalities resolve, but levator tear does not, and is associated with levator weakness and posterior-vaginal wall descent.

Planned home birth: benefits, risks, and opportunities

While the number of women in developed countries who plan a home birth is low, the number has increased over the past decade in the US, and there is evidence that more women would choose this option if it were readily available. Rates of planned home birth range from 0.1% in Sweden to 20% in the Netherlands, where home birth has always been an integrated part of the maternity system. Benefits of planned home birth include lower rates of maternal morbidity, such as postpartum hemorrhage, and perineal lacerations, and lower rates of interventions such as episiotomy, instrumental vaginal birth, and cesarean birth. Women who have a planned home birth have high rates of satisfaction related to home being a more comfortable environment and feeling more in control of the experience. While maternal outcomes related to planned birth at home have been consistently positive within the literature, reported neonatal outcomes during planned home birth are more variable. While the majority of investigations of planned home birth compared with hospital birth have found no difference in intrapartum fetal deaths, neonatal deaths, low Apgar scores, or admission to the neonatal intensive care unit, there have been reports in the US, as well as a meta-analysis, that indicated more adverse neonatal outcomes associated with home birth. There are multiple challenges associated with research designs focused on planned home birth, in part because conducting randomized controlled trials is not feasible. This report will review current research studies published between 2004 and 2014 related to maternal and neonatal outcomes of planned home birth, and discuss strengths, limitations, and opportunities regarding planned home birth.

Validity and reliability of an instrumented speculum designed to minimize the effect of intra-abdominal pressure on the measurement of pelvic floor muscle strength

BACKGROUND

Measurements of pelvic floor muscle strength are contaminated by crosstalk from intra-abdominal pressure. We tested an improved instrumented speculum designed to minimize this crosstalk. The hypotheses were that the speculum yields: 1) maximum vaginal closure forces unrelated to intra-abdominal pressure, 2) discriminatory validity between women with strong vs. weak pelvic floor muscles, and 3) acceptable test-retest reliability.

METHODS

Maximum voluntary vaginal closure force was measured in 40 incontinent women (20-77 years) on two visits spaced one month apart. At the baseline visit, intra-abdominal pressure was also estimated via intra-vesical catheterization during the vaginal closure force measurement. Subjective estimate of pelvic floor muscle strength was also assessed using digital palpation by a skilled examiner to determine group placement as "strong" (n=31) or "weak" (n=9).

FINDINGS

Vaginal closure force was not significantly correlated with intra-abdominal pressure (r=-.26, P=.109). The groups with subjectively scored strong and weak pelvic floor muscles differed significantly by mean [SD] maximum vaginal closure force (3.8 [1.7] vs. 1.9 [0.8] N respectively, P<.01.) Across both time points the mean vaginal closure force was 3.42 [1.67] N with a range of .68 to 9.05 N. Mean Visit 1 and Visit 2 vaginal closure force scores did not differ (3.41 [1.8] and 3.42 [1.6] N, respectively). The vaginal closure force repeatability coefficient was 3.1N.

INTERPRETATION

The improved speculum measured maximum vaginal closure force without evidence of crosstalk from intra-abdominal pressure, while retaining acceptable discriminant validity and repeatability.

Probing the repulsive core of the nucleon-nucleon interaction via the (4)He(e,e'pN) triple-coincidence reaction

We studied simultaneously the (4)He(e,e'p), (4)He(e,e'pp), and (4)He(e,e'pn) reactions at Q(2)=2(GeV/c)(2) and x(B)>1, for an (e,e'p) missing-momentum range of 400 to 830  MeV/c. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum, leaving the residual A=2 system at low excitation energy. These data were used to identify two-nucleon short-range correlated pairs and to deduce their isospin structure as a function of missing momentum, in a region where the nucleon-nucleon (NN) force is expected to change from predominantly tensor to repulsive. The abundance of neutron-proton pairs is reduced as the nucleon momentum increases beyond ∼500  MeV/c. The extracted fraction of proton-proton pairs is small and almost independent of the missing momentum. Our data are compared with calculations of two-nucleon momentum distributions in (4)He and discussed in the context of probing the elusive repulsive component of the NN force.

Female college students’ beliefs about cervical cancer screening

Purpose

To explore female college students’ perceived benefits and barriers to cervical cancer screening and perceived vulnerability to cervical cancer.

Method

The study was exploratory and cross sectional. The Pap Smear Belief Questionnaire was distributed online to a sample of 267 female undergraduate baccalaureate nursing students.

Findings

Students who obtained routine Pap smears perceived greater benefits and fewer barriers to routine screening than the students who did not obtain routine Pap smears. Personal vulnerability to cervical cancer was not a significant finding. Students who were in a long-term relationship, non-smoking and initiated sexual intercourse at a younger age were more likely to obtain routine screening.

Conclusion

Stressing importance of preventive health care associated with routine cervical cancer screening is important to promote women’s health regardless of age or level of education. Further studies with a broader range of college students as participants are needed to better understand their beliefs about the benefits and barriers to obtaining routine screening, and their perceptions of vulnerability to cervical cancer.

Home birth after hospital birth: women's choices and reflections

INTRODUCTION

The number of US women choosing home birth is increasing. Little is known about women who choose home birth after having experienced hospital birth; therefore, the purpose of this research was to explore reasons why these women choose home birth and their perceptions regarding their birth experiences.

METHODS

Qualitative description was the research design, whereby focus groups were conducted with women who had hospital births and subsequently chose home birth. Five focus groups were conducted (N = 20), recorded, and transcribed verbatim. Qualitative content analysis was undertaken allowing themes to emerge.

RESULTS

Five themes emerged from the women's narratives: 1) choices and empowerment: with home birth, women felt they were given real choices rather than perceived choices, giving them feelings of empowerment; 2) interventions and interruptions: women believed things were done that were not helpful to the birth process, and there were interruptions associated with their hospital births; 3) disrespect and dismissal: participants believed that during hospital birth, providers were more focused on the laboring woman's uterus, with some experiencing dismissal from their hospital provider when choosing to birth at home; 4) birth space: giving birth in their own home, surrounded by people they chose, created a peaceful and calm environment; and 5) connection: women felt connected to their providers, families, newborns, and bodies during their home birth.

DISCUSSION

For most participants, dissatisfaction with hospital birth influenced their subsequent decision to choose home birth. Despite experiencing challenges associated with this decision, women expressed satisfaction with their home birth.

Improved birth weight for Black infants: outcomes of a Healthy Start program

OBJECTIVES

We determined whether participation in Healthy Babies Healthy Start (HBHS), a maternal health program emphasizing racial equity and delivering services through case management home visitation, was associated with improved birth outcomes for Black women relative to White women.

METHODS

We used a matched-comparison posttest-only design in which we selected the comparison group using propensity score matching. Study data were generated through secondary analysis of Michigan state- and Kalamazoo County-level birth certificate records for 2008 to 2010. We completed statistical analyses, stratified by race, using a repeated-measures generalized linear model.

RESULTS

Despite their smoking rate being double that of their matched counterparts, Black HBHS participants delivered higher birth-weight infants than did Black nonparticipants (P = .05). White HBHS participants had significantly more prenatal care than did White nonparticipants, but they had similar birth outcomes (P = .7 for birth weight; P = .55 for gestation).

CONCLUSIONS

HBHS participation is associated with increased birth weights among Black women but not among White women, suggesting differential program gains for Black women.

Predicting Birth-Related Levator Ani Tear Severity in Primiparous Women: Evaluating Maternal Recovery from Labor and Delivery (EMRLD Study)

OBJECTIVE

To determine which maternal characteristics or birth events independently predict severity of levator ani muscle (LA) tears at first vaginal birth in a longitudinal/observational investigation in a tertiary care hospital.

SAMPLE

Ninety primiparas with at least one at risk for LA tear inclusion factor at vaginal birth: maternal age ≥ 33 years, second stage ≥ 150 minutes, macrosomia, instrumented delivery, and/or anal sphincter laceration were studied.

METHODS

Magnetic Resonance Imaging (MRI) was obtained early postpartum (mean ± sd 48.9 ± 21.6 days) to identify LA tear. Severity of LA muscle fiber loss was graded on an ordinal scale of: "0" as no loss, "1" as <50% unilateral loss, "2" as ≥50% unilateral or <50% bilateral loss, and "3" as ≥50% bilateral loss. Data were analyzed using proportional odds modeling. Inclusion factors were explored as predictors of LA tear severity and at analysis episiotomy, time spent actively pushing, epidural, and oxytocin were also considered. The main outcome measures of interest included grading of severity of LA muscle fiber loss on an ordinal scale.

RESULTS

Respective counts/percentages of women within each 0 thru 3 ordered category of LA tear severity were: "0" = 58(64%), "1" = 9(10%), "2" = 15(17%), and "3" = 8(9%). Estimates and 95% CI for significant demographic or obstetric univariate predictors of LA tear severity level were age, OR 1.093 (CI 1.012 - 1.180), p = 0.023; and time spent in active pushing, OR 1.089 (CI 1.005 - 1.180), p = 0.038. The other factors considered were not significant. There were too few women with forceps deliveries to analyze. CONCLUSION: In our enriched sample of primiparous women, 26% showed a significant LA tear. Maternal age and time spent actively pushing independently predict LA tear severity.

Why WIC Women Stop Breastfeeding?

Women who receive benefits from Women, Infants, and Children (WIC) are not meeting the recommendations for breastfeeding duration. The purpose of this descriptive correlational study was to examine maternal sociodemographic and time factors related to the reason for discontinuing breastfeeding for 238 WIC participants who initiated breastfeeding. This study is a secondary data analysis of existing longitudinal survey and administrative data from a Chicago-area community health center and WIC clinic. The average length of breastfeeding within this sample was 16 weeks. Women in this sample reported a perception of insufficient milk (PIM; 46%), returning to work/school (13%), and other maternal problems (13%) as the main reasons for discontinuing breastfeeding. Within the first 16 weeks, 65% of the women who discontinued breastfeeding cited PIM as the main reason, with 2 distinct time points at 5 weeks and 13 weeks. Women of Hispanic descent were more likely than non-Hispanic women to report this perception (odds ratio 2.66, P = .01, 95% confidence interval = 1.21-5.83). Although these women initiated breastfeeding, the national recommendation for breastfeeding duration was not met in this population. Additionally, many women stopped breastfeeding early due to PIM. There are distinct time points where culturally tailored interventions may be most effective.

The relationship between pelvic organ prolapse, genital body image, and sexual health

AIMS

Pelvic organ prolapse involves physical changes to the genitals, potentially distressing to women. We hypothesized poorer genital body image in prolapsed women versus controls and that genital body image would correlate with sexual health.

METHODS

Seventy-four sexually active women, 13 with prolapse, 24 with surgically corrected prolapse, 37 without prolapse, completed the Genital Self Image Scale (GSIS-20), Body Esteem Scale (BES), and Female Sexual Function Index (FSFI).

RESULTS

In prolapsed women median GSIS-20 scores were 28/40, women with surgically corrected prolapse 32/40 and never prolapsed 34/40 (χ(2) = 9.6, P < 0.01). Post hoc analysis showed significant differences between prolapsed and never prolapsed groups (P < 0.05). After adjusting for BES, GSIS-20 correlated with overall FSFI (r = 0.384, P < 0.01), and its subscales of desire (r = 0.34, P < 0.05) and satisfaction (r = 0.41, P < 0.01).

CONCLUSIONS

Women with prolapse are at risk for poorer genital body image and reduced sexual health.

Feasibility of a longitudinal study of women anticipating first pregnancy and assessed by multiple pelvic exams: recruitment and retention challenges

OBJECTIVE

To better understand the relationship between childbirth and pelvic floor disorders the ideal study design would begin with data collection prior to but close in time to first pregnancy and follow participants through postpartum. We conducted a feasibility study to determine the following: a) whether women desiring to get pregnant would agree to pre-pregnancy data collection including a one-time urethral catheter measure and repeat pelvic exams to ascertain a baseline within 6 months of pregnancy; b) effectiveness of various recruitment and retention methods, c) number achieving pregnancy, and then d) number expressing willingness to continue follow-up through pregnancy and postpartum.

METHODS

Advertising included newspaper ads, targeted emails and flyers. Post-enrollment, four data collection visits were scheduled and occurred every 6 months or until pregnant. If pregnancy occurred, women were asked to indicate their willingness to continue assessments.

RESULTS

The most successful advertising strategy for both recruitment and retention was local newspaper ads. Ninety-four women inquired about the study, 30 enrolled. Post-baseline retention was 23 women at 6 months, 17 at 12 months, and 13 at 18 months. Nine of the 30 women achieved pregnancy; two remained eligible and willing to participate through pregnancy and postpartum.

CONCLUSIONS

This study provides data on feasibility of recruiting women to establish near-pregnancy clinical baseline measures that include pelvic exams. Close to 30% reached pregnancy within 2 years of study start and within 6 months of most recent pelvic exam measure. Of those who became pregnant, 22% expressed willingness to continue follow-up into the childbearing year.

Quantitative Analysis of HER2 Receptors Expression In Vivo by Near-Infrared Optical Imaging

Purpose: HER2 overexpression has been associated with a poor prognosis and resistance to therapy in breast cancer patients. However, up to now, quantitative estimates of this important characteristic have been limited to ex vivo ELISA essays of tissue biopsies and/or PET-based analysis. We aim at developing a novel approach in optical imaging, involving specific probes that do not interfere with the binding of the therapeutic agents, thus, excluding competition between therapy and imaging. Affibody-based molecular probes seem to be ideal for in vivo analysis of HER2 receptors using near-infrared optical imaging. To achieve quantification of HER2 receptors and overcome experimental uncertainties, we analyze post-injection temporal variations of the fluorescence intensity in the tumor area.Experimental design: Quantitative in vivo near-infrared imaging uses HER2-specific albumin-binding domain-fused-(ZHER2:342)2 Affibody molecules, labeled with AlexaFluor750 dye, as targeting agents. Subcutaneous tumor xenografts, expressing different levels of HER2 (BT474, MDA-MB361, MCF7, U251), are imaged at different times post-injection. Mathematical modeling allowed assessment of correlation between measured characteristics and HER2 expression levels from ex-vivo assays of the same tumors.Results: Affibody-Alexa Fluor conjugates may be used as a specific near-infrared probe for the non-invasive imaging of HER2-positive tumors, while analysis of the imaging parameters, directly estimated from the sequence of optical images, provides quantitative insight on the HER2 overexpression, as suggested by observed correlation between tumor cell amplification/overexpression of HER2, and these parameters.Conclusions: Method might potentially be employed in clinic for noninvasive monitoring of the HER2 expression variation in response to therapeutic intervention.

Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 5002.

Body image and sexuality in women with pelvic organ prolapse

INTRODUCTION

The effect of physical changes associated with pelvic organ prolapse on a woman's body image and how that may influence sexuality has not been well studied.

OBJECTIVE

The goal of this study was to assess the implementation and utility of a body image questionnaire in women with pelvic organ prolapse. Two research questions were asked: (1) What is the impact of pelvic organ prolapse on women's body image and how does this affect their sexual health?, and (2) Does the Vaginal Changes Sexual and Body Esteem (VSBE) Scale show utility for use in assessing body image and sexual health in women with pelvic organ prolapse?

METHOD

A qualitative design was used for this study. Telephone interviews were conducted using a semi-structured questionnaire and an adapted body image and sexuality questionnaire specific to genital body image.

RESULTS

Thirteen women with pelvic organ prolapse completed the study. Eight women were classified as sexually active, and 5 women were not sexually active. Data showed women with pelvic organ prolapse, classified as sexually active, scored significantly lower on the VSBE scale than women who were not sexually active. There was a positive correlation between severity of prolapse and VSBE scores.

CONCLUSION

The VSBE scale questionnaire showed utility and potential for demonstrating change in body image in women with pelvic organ prolapse. This tool may assist clinicians in a more thorough assessment of body image and sexuality in this population of women.

Is MUGA scan necessary in patients with low-risk breast cancer before doxorubicin-based adjuvant therapy? Multiple gated acquisition

Doxorubicin-based chemotherapy in the adjuvant treatment of breast cancer has become standard. Use of doxorubicin is limited by cardiac dysfunction; however, the incidence is dramatically reduced by limiting the dose to less than 550 mg/m(2). Although the cumulative dose in breast cancer is typically 240 mg/m(2), multiple gated acquisition (MUGA) scans are still recommended for determining cardiac functional status in these patients. To examine the need for this practice, we reviewed 296 patients who underwent surgery for breast cancer at Roswell Park Cancer Institute between July 1997 and December 1998. Fifty-nine of 95 (62%) patients receiving doxorubicin-based regimens, and 3 of 39 (7%) receiving nondoxorubicin regimens had pretreatment MUGA scans. The MUGA scans showed normal results in 58 patients and low-normal in 4 (6.5%), with no wall motion abnormalities encountered. There were no cases where doxorubicin was not used because of an abnormal MUGA scan. There were no cardiac complications in the 59 women who received doxorubicin-based chemotherapy. MUGA will screen out few, if any, women under consideration for doxorubicin-based adjuvant therapy; the decision to avoid doxorubicin can be made based on age and preexisting comorbidity. Guidelines recommending routine use of MUGA before the administration of doxorubicin for adjuvant therapy for breast cancer should be reconsidered.

Human genetic disorders, a phylogenetic perspective

When viewed from the perspective of time, human genetic disorders give new insights into their etiology and evolution. Here, we have correlated a specific set of Alu repetitive DNA elements, known to be the basis of certain genetic defects, with their phylogenetic roots in primate evolution. From a differential distribution of Alu repeats among primate species, we identify the phylogenetic roots of three human genetic diseases involving the LPL, ApoB, and HPRT genes. The different phylogenetic age of these genetic disorders could explain the different susceptibility of various primate species to genetic diseases. Our results show that LPL deficiency is the oldest and should affect humans, apes, and monkeys. ApoB deficiency should affect humans and great apes, while a disorder in the HPRT gene (leading to the Lesch-Nyhan syndrome) is unique to human, chimpanzee, and gorilla. Similar results can be obtained for cancer. We submit that de novo transpositions of Alu elements, and saltatory appearances of Alu-mediated genetic disorders, represent singularities, places where behavior changes suddenly. Alus' propensity to spread, not only increased the regulatory and developmental complexity of the primate genome, it also increased its instability and susceptibility to genetic defects and cancer. The dynamic spread not only provided markers of primate phylogeny, it must have actively shaped the course of that phylogeny.

Alu-mediated phylogenetic novelties in gene regulation and development

Differential gene expression lies at the heart of biology and is responsible for all developmental processes, including the growth and differentiation of cells. Perhaps even speciation could be defined as a change in differential gene expression over evolutionary time. The present work is a phylogenetic study of four Alu elements known to have gene regulatory functions in the human. The four elements have been shown to regulate the parathyroid hormone (PTH) gene via a negative calcium-response element, the hematopoietic cell-specific FcepsilonRI-gamma receptor gene via a cis-acting positive/negative regulatory element, the CNS-specific nicotinic acetylcholine receptor alpha3 gene via a cis-acting positive/negative control element, and the T-cell-specific CD8alpha gene via a complex transcriptional regulator. The four Alu elements that impact differential gene expression were found to be differentially distributed among seven primate species (human, chimpanzee, gorilla, orangutan, baboon, rhesus, and macaque) in a way that is congruent with an accepted phylogeny of these species. The results establish a link between gene regulation and the divergence of primates. This evolutionary variation in gene regulation also suggests a novel experimental system to study the very complex transcriptional regulation of gene expression, by studying side-by-side the regulation of the same gene from two primate species that differ in the cis-acting regulatory elements of the gene.

Electronic structure and nonlinear optical properties of model push-pull polyenes with modified indanone groups: a theoretical investigation

Several model polyenes with modified indanone groups were studied by means of density functional theory (DFT) B3LYP/6-31G*, ab initio HF/3-21G* and semiempirical AM1 methods. We investigated the effect of several substituents upon the relationship between the structure, spatial distribution of the highest occupied and the lowest unoccupied pi-MOs, a concept of the global softness and the global hardness as well as both linear and nonlinear polarizabilities for the set of pi-electron chromophores represented by the short-chain model polyene (butadiene) carrying out p-methoxyphenyl group on the one end and several modified indanone groups on the opposite end of the molecule. As probing endocyclic groups used to modify the structure of indanone the following substituents: > CH2; > C=O; > SO2, > C=CH(NO2) and > C=C(CN)2 were selected. The cubic relationship between the polarizability and the global softness was found. The highest polarizabilities (alpha, beta, gamma) are predicted for the derivatives with > C=C(CN)2 group. It was found that the value of beta depends mainly on the difference between dipole moments in the excited and ground states of the molecules. In the case of > SO2 group the results of AMI calculations significantly deviate from relationships found for other derivatives. Experimental IR and Raman spectra of newly synthesized indandione derivative of cinnamaldehyde were compared with computed ones.

Origin and phylogenetic distribution of Alu DNA repeats: irreversible events in the evolution of primates

Over the past 60 million years, or so, approximately one million copies of Alu DNA repeats have accumulated in the genome of primates, in what appears to be an ongoing process. We determined the phylogenetic distribution of specific Alu (and other) DNA repeats in the genome of several primates: human, chimpanzee, gorilla, orangutan, baboon, rhesus, and macaque. At the population level studied, the majority of the repeats was found to be fixed in the primate species. Our data suggest that new Alu elements arise in unique, irreversible events, in a mechanism that seems to preclude precise excision and loss. The same insertions did not arise independently in two species. Once inserted and genetically fixed, the DNA elements are retained in all descendant lineages. The irreversible expansion of Alu s introduces a vector of time into the evolutionary process, and provides realistic (rather than statistical) answers to questions on phylogenies. In contrast to point mutations, the present distribution of individual Alu s is congruent with just one phylogeny. We submit that only irreversible and taxonomically relevant events are at the molecular basis of evolution. Most point mutations do not belong to this category.

The chimpanzee alpha-fetoprotein-encoding gene shows structural similarity to that of gorilla but distinct differences from that of human

The chimpanzee (Pan troglodytes) alpha-fetoprotein (AFP)-encoding gene (AFP) spans 18,867 bp from the transcription start point to the polyadenylation site, and the nucleotide (nt) sequence reveals that the gene is composed of 15 exons, which are symmetrically placed within three domains of AFP. In addition, we report 3121 bp of 5'-flanking sequence and 4886 bp of 3'-flanking sequence. The entire 26,874 bp of contiguous DNA reported here was determined from three overlapping lambda phage clones. The deduced polypeptide chain is composed of a 19-amino-acid (aa) putative leader peptide, followed by 590 aa of the mature protein. The sequence of chimpanzee AFP was compared with those of the previously published human AFP [Gibbs et al., Biochemistry 26 (1987) 1332-1343] and gorilla AFP [Ryan et al., Genomics 9 (1991) 60-72]. At the aa level, the human AFP differs from the chimpanzee at 6 aa positions and from the gorilla at 4 aa positions; the chimpanzee and gorilla differ at 8 aa positions. There are four types of repetitive sequence elements (X, Alu, Xba and Kpn) in the introns and flanking regions of chimpanzee AFP, and they are located in orthologous positions in the human and gorilla AFP. However, one specific Alu and one Xba repeat in introns 4 and 7, respectively, found in human AFP, are absent from orthologous positions in chimpanzee and gorilla AFP. These two repeats represent human-specific novelties that arose from recent DNA transpositions in primate phylogeny.

Complete structure of the human Gc gene: differences and similarities between members of the albumin gene family

The sequence of the human Gc gene, including 4228 base pairs of the 5'-flanking region and 8514 base pairs of the 3' flanking region (55,136 in total), was determined from five overlapping lambda phage clones. The sequence spans 42,394 base pairs from the cap site to the polyadenylation site, and it reveals that the gene is composed of 13 exons, which are symmetrically placed within the three domains of the Gc protein. The first exon is partially untranslated, as is exon 12, which contains the termination codon TAG. Exon 13 is entirely untranslated, but contains the polyadenylation signal AATAAA. Ten central introns split the coding sequence between codon positions 2 and 3 and between codon positions 3 and 1 in an alternating pattern, exactly as has been observed in the structure of the albumin and alpha-fetoprotein genes. The Gc gene has several distinctive features which set it apart from the other members of the family. First, the gene is smaller by two exons, which results in a protein some 130 amino acids shorter than albumin or AFP. This decrease in size may result from the loss of two internal exons during the evolutionary history of the Gc gene. Second, exons 6, 8, 9, and 11 are smaller than their counterparts in albumin or AFP by a total of 8 codons (1, 4, 1, and 2, respectively). Although the mRNA and protein expressed from the Gc gene are significantly smaller, the gene itself is about 2.5 times larger than the other genes of the family.(ABSTRACT TRUNCATED AT 250 WORDS)