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1.
Child Abuse Negl ; 146: 106458, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37866251

RESUMEN

BACKGROUND: Intimate partner violence (IPV) is associated with an increased risk of poorer child development. Existing research has focused on physical abuse with less known about the associations with emotional IPV. OBJECTIVE: To describe the period prevalence of mother's experiences of emotional IPV during children's preschool years and associations with child mental, physical, social, and cognitive development. METHODS: Secondary analysis of control group data (n = 194) from an Australian randomised trial (right@home), which recruited pregnant women experiencing social adversity from antenatal clinics in 2013-14. Women reported emotional abuse (Composite Abuse Scale) at child ages 3-5 years. Measures of child development at 5 years included: Strengths and Difficulties Questionnaire, Social Skills Improvement System, Pediatric Quality of Life Inventory, Clinical Evaluation of Language Fundamentals, School Entry Alphabetic and Phonological Awareness Readiness Test, NIH executive function subtests, sleep and health. The prevalence of emotional IPV from 3 to 5 years was estimated. Regression models compared developmental outcomes according to emotional IPV exposure, adjusted for child age, child gender, and maternal education. Missing data were accounted for using multiple imputation. RESULTS: From 3-5 years, emotional IPV was experienced by 57% of women. Emotional IPV exposure was consistently associated with poorer child developmental outcomes. Differences were most apparent for SDQ internalising (mean difference 1.2, 95% CI 0.2 to 2.1) and externalising difficulties (1.2, 95% CI -0.1 to 2.4). CONCLUSIONS: Emotional IPV was highly prevalent amongst families experiencing social adversity. Developing acceptable and effective identification processes and interventions that prioritise families experiencing co-occurring social adversities should be a public health priority.


Asunto(s)
Violencia de Pareja , Madres , Niño , Preescolar , Femenino , Humanos , Embarazo , Australia/epidemiología , Abuso Emocional , Violencia de Pareja/psicología , Madres/psicología , Calidad de Vida
2.
Gynecol Oncol Rep ; 47: 101196, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37168405

RESUMEN

Intraplacental choriocarcinoma (IC), or choriocarcinoma in situ, is a rare disease on the gestational trophoblastic disease (GTD) spectrum, with <100 case reports available in the literature. We propose that many patients with IC are likely to be missed as the majority of patients do not present with metastases. Currently, there are no standardized protocols in existence for postpartum monitoring of these patients. We present a case of IC identified in the term placenta of a 21-year-old who delivered by primary cesarean due to concern for fetal intolerance of labor. Subsequently, we review the recommendations available on postpartum monitoring of this likely under-diagnosed condition.

3.
Gynecol Oncol Rep ; 46: 101163, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37082520

RESUMEN

Pregnancy luteomas are rare, nonmalignant lesions thought to be caused by hormonal changes during pregnancy. Granulosa cell tumor is a rare type of ovarian cancer; 10% occur during pregnancy and typically present with elevated inhibin levels. Herein, we present a case of a pregnant female with a pelvic mass and elevated inhibin B suggestive of a granulosa cell tumor, yet with final pathology consistent with a pregnancy luteoma.

4.
Genetica ; 151(3): 179-199, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36869995

RESUMEN

Retrotransposon families in the rodent family Cricetidae have been understudied in contrast to Muridae, both taxa classified within the superfamily Muroidea. Therefore, we carried out a study to advance our knowledge of the unique mys LTR-retroelement identified in Peromyscus leucopus, by incorporating intra-ORF PCR, quantitative dot blots, DNA and protein library screens, the generation of molecular phylogenies, and analyses of orthologous LTR-retroelement loci. These analyses led to the discovery of three additional related families of LTR-retroelements, which include a 2900 bp full-length element of mys-related sequences (mysRS), an 8000 bp element containing the mys ORF1 sequence (mORF1) with ERV-related sequences downstream in the reverse orientation, as well as an 1800 bp element primarily consisting of mys ORF2 (mORF2) related sequences flanked by LTRs. Our data revealed only a few full-length mys elements among genera of the Neotominae subfamily of cricetid rodents, most existing as partial copies. The mysRS and mORF1 elements are also limited to the genomes of the Neotominae subfamily, whereas mORF2 appears to be restricted to the Peromyscus genus. Molecular phylogenies demonstrating concerted evolution along with an assessment of orthologous loci in Peromyscus for the presence or absence of elements are consistent with activity of these novel LTR-retroelement families within this genus. Together with known activity of various families of non-LTR retroelements in Peromyscus species, we propose that retrotransposons have been continually contributing to the dynamics of Peromyscus genomes promoting genomic diversity and may be correlated with the evolution of more than 50 identified Peromyscus species.


Asunto(s)
Retroelementos , Roedores , Animales , Roedores/genética , Peromyscus/genética , Secuencias Repetidas Terminales , Genoma , Filogenia , Evolución Molecular
5.
Gynecol Oncol Rep ; 45: 101133, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36647550

RESUMEN

Pelvic metastasis of melanoma is extremely rare and may pose a diagnostic challenge. We present a case report of a female with a history of colon cancer who underwent exploratory surgery for a pelvic mass that was suspicious for ovarian malignancy. Pathology was consistent with both recurrent colon cancer as well as synchronous newly diagnosed metastatic melanoma.

6.
J Robot Surg ; 16(3): 569-573, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34278543

RESUMEN

With advances in minimal invasive surgery, robotic surgery has become the widespread approach for surgical staging of endometrial cancer in the obese population. This study aimed to evaluate safety and surgical outcomes of robotic surgery in the morbidly obese and extremely morbidly obese patients with endometrial cancer. Retrospective cohort study. A total of 391 obese women undergoing robotic-assisted surgical staging were identified and included in the study. Surgical outcomes for obese patients (BMI > 30 kg/m2) who underwent surgical staging between 2011 and 2019 were retrospectively collected. Preoperative characteristics, perioperative outcomes and postoperative complications were analyzed among the categories of obesity (BMI ≥ 30-34.9 kg/m2, ≥ 35-39.9 kg/m2, ≥ 40-49.9 kg/m2) including the extremely morbid obese (BMI > 50 kg/m2). Comparative analysis revealed a higher percentage of postoperative complications with increasing BMI, although the results were not statistically significant. Postoperative complications are observed at higher rates among women with increasing BMI.


Asunto(s)
Neoplasias Endometriales , Obesidad Mórbida , Procedimientos Quirúrgicos Robotizados , Índice de Masa Corporal , Neoplasias Endometriales/complicaciones , Neoplasias Endometriales/cirugía , Femenino , Humanos , Obesidad Mórbida/complicaciones , Obesidad Mórbida/cirugía , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/etiología , Estudios Retrospectivos , Procedimientos Quirúrgicos Robotizados/métodos , Resultado del Tratamiento
7.
Aust J Rural Health ; 29(6): 835-849, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34687477

RESUMEN

BACKGROUND: Australian policy reports recommended schools to be leveraged to better support student mental health, with a focus on regional and rural areas where students have poorer mental health outcomes. In designing solutions to address this systemic gap, decision-makers require an understanding of the barriers and facilitators experienced by regional and rural schools. However, current literature has focused on metropolitan schools and neglected to explore facilitators. OBJECTIVE: To review the evidence on barriers and facilitators in delivering student mental health support experienced by regional and rural schools in Organisation for Economic Co-operation and Development nations. DESIGN: A mixed-methods systematic review of peer-reviewed and grey literature. FINDINGS: The search identified 4819 studies. A full-text review by 2 reviewers resulted in 5 papers, which met the inclusion criteria and were assessed using methodological appraisal. One study used qualitative data, 2 studies used quantitative data, and 2 studies were a mixed-methods design. DISCUSSION: While there was a paucity of studies, this review draws together the most up-to-date research. The barriers and facilitators were categorised into 3 themes: access to services and resources; mental health literacy of staff and parents; and communication and collaboration between stakeholders. CONCLUSION: This review presents a comprehensive synthesis of the literature and highlights opportunities to leverage rural and regional schools to support student mental health, focusing on the quality of communication and collaboration, and increasing access to services and resources, and mental health literacy. Research should explore the unique advantages of rural and regional areas to inform policy, including a focus on strengths.


Asunto(s)
Salud Mental , Instituciones Académicas , Australia , Humanos , Estudiantes
9.
PLoS One ; 16(7): e0253885, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34234367

RESUMEN

Multigenerational effects (often called maternal effects) are components of the offspring phenotype that result from the parental phenotype and the parental environment as opposed to heritable genetic effects. Multigenerational effects are widespread in nature and are often studied because of their potentially important effects on offspring traits. Although multigenerational effects are commonly observed, few studies have addressed whether they affect offspring fitness. In this study we assess the effect of potential multigenerational effects of parental body size and natal carcass size on lifetime fitness in the burying beetle, Nicrophorus marginatus (Coleoptera; Silphidae). Lifespan, total number of offspring, and number of offspring in the first reproductive bout were not significantly related to parental body size or natal carcass size. However, current carcass size used for reproduction was a significant predictor for lifetime number of offspring and number of offspring in the first brood. We find no evidence that multigenerational effects from larger parents or larger natal carcasses contribute to increased fitness of offspring.


Asunto(s)
Tamaño Corporal/genética , Escarabajos/genética , Herencia Materna , Animales , Escarabajos/crecimiento & desarrollo , Femenino , Aptitud Genética , Larva/genética , Masculino
10.
Pediatr Pulmonol ; 56(5): 1189-1197, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33295690

RESUMEN

OBJECTIVE: Respiratory illnesses compose the most common diagnoses of patients admitted to pediatric intensive care units. In pediatrics, high-flow nasal cannula (HFNC) therapy is an intermediate level of respiratory support with variability in practice. We conducted a pre-post intervention study of patients placed on HFNC therapy before and after the implementation of an HFNC protocol. METHODS: This was a quality improvement/pre-post intervention study of pediatric patients who received HFNC therapy in our teaching, tertiary care children's hospital between January 2015 and April 2019. Patients were evaluated before and after the implementation of a protocol that promoted initiation of higher flow and rapid weaning. Our primary outcomes were initial flow and rate of weaning pre- and post-protocol; our secondary outcomes were HFNC failure rate (defined as escalation to noninvasive ventilation or mechanical ventilation) and length of hospital stay. Propensity matching was used to account for differences in age and weight pre- and post-protocol. RESULTS: In total, 584 patients were included, 292 pre-protocol, and 292 post-protocol. The median age was 20 months, and the indication for HFNC therapy was bronchiolitis in 29% of patients. Post-protocol patients compared to pre-protocol patients had significantly a higher initial flow (median 14.5 L/min vs. 10 L/min, p < .001) and a higher weaning rate of flow (median 4.1 L/min/h vs. 2.4 L/min/h, p < .001). Post-protocol patients also had a lower HFNC failure rate (10% vs. 17%, p = .015) and a shorter length of stay (5.97 days vs. 6.80 days, p = .006). CONCLUSION: Among pediatric patients, the implementation of an HFNC protocol increases initial flow, allows for more rapid weaning, and may decrease the incidence of escalation to noninvasive ventilation or mechanical ventilation.


Asunto(s)
Cánula , Bronquiolitis/terapia , Humanos , Lactante , Ventilación no Invasiva , Terapia por Inhalación de Oxígeno , Respiración Artificial
11.
BMC Health Serv Res ; 19(1): 833, 2019 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-31727073

RESUMEN

BACKGROUND: Women and families experiencing socioeconomic and psychosocial adversity are the least likely to access health care but most likely to benefit. For health services to effectively meet the needs of individuals experiencing adversity, research involving the health services must be truly representative. However, individuals experiencing adversity are typically excluded from or underrepresented in health services research. This paper reports on the implementation of a quality improvement approach designed to support recruitment and retention of pregnant women experiencing adversity in a longitudinal, health services randomized controlled trial ("right@home"). METHODS: right@home recruited Australian women from 10 public maternity hospitals across the states of Victoria and Tasmania who were experiencing adversity (≥2 risk factors on screening survey). Regular follow-up assessments were conducted by phone or face-to-face to child age 2 years. Research processes were designed taking heed of previous research demonstrating effective strategies for recruiting and retaining minority groups (e.g. piloting the recruitment process; recruiting via the health service providing care to the subgroup; remunerating participants); however, we were concerned that important information was missing. Therefore, once recruitment began, we conducted a continuous evaluation of the research processes, testing and implementing changes to processes or new strategies to maximize recruitment and retention (e.g. using a suite of strategies to maintain contact with families, using flexible data collection methods, obtaining consent for data linkage for future health and education data). RESULTS: right@home enrolled a large cohort of women (N = 722) experiencing high levels of adversity according to socioeconomic status and psychosocial risk factors, and achieved excellent retention (83% completion at 2 years). Most strategies appeared to increase recruitment and retention. All required additional time from the research team to develop and test, and some required extra funding, which ranged from minor (e.g. printing) to substantial (e.g. salaries, remuneration). CONCLUSIONS: By taking a quality improvement approach, supported by sufficient resourcing and flexible research processes, it is possible to recruit and retain a large cohort of women experiencing adversity who are typically missed or lost from longitudinal research.


Asunto(s)
Investigación sobre Servicios de Salud/métodos , Servicios de Salud Materna/organización & administración , Mujeres Embarazadas/psicología , Femenino , Humanos , Estudios Longitudinales , Embarazo , Mejoramiento de la Calidad , Apoyo Social , Poblaciones Vulnerables
12.
Pediatrics ; 143(1)2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-30591616

RESUMEN

OBJECTIVES: Nurse home visiting (NHV) may redress inequities in children's health and development evident by school entry. We tested the effectiveness of an Australian NHV program (right@home), offered to pregnant women experiencing adversity, hypothesizing improvements in (1) parent care, (2) responsivity, and (3) the home learning environment at child age 2 years. METHODS: A randomized controlled trial of NHV delivered via universal child and family health services was conducted. Pregnant women experiencing adversity (≥2 of 10 risk factors) with sufficient English proficiency were recruited from antenatal clinics at 10 hospitals across 2 states. The intervention comprised 25 nurse visits to child age 2 years. Researchers blinded to randomization assessed 13 primary outcomes, including Home Observation of the Environment (HOME) Inventory (6 subscales) and 25 secondary outcomes. REULTS: Of 1427 eligible women, 722 (50.6%) were randomly assigned; 306 of 363 (84%) women in the intervention and 290 of 359 (81%) women in the control group provided 2-year data. Compared with women in the control group, those in the intervention reported more regular child bedtimes (adjusted odds ratio 1.76; 95% confidence interval [CI] 1.25 to 2.48), increased safety (adjusted mean difference [AMD] 0.22; 95% CI 0.07 to 0.37), increased warm parenting (AMD 0.09; 95% CI 0.02 to 0.16), less hostile parenting (reverse scored; AMD 0.29; 95% CI 0.16 to 0.41), increased HOME parental involvement (AMD 0.26; 95% CI 0.14 to 0.38), and increased HOME variety in experience (AMD 0.20; 95% CI 0.07 to 0.34). CONCLUSIONS: The right@home program improved parenting and home environment determinants of children's health and development. With replicability possible at scale, it could be integrated into Australian child and family health services or trialed in countries with similar child health services.


Asunto(s)
Salud Infantil/economía , Disparidades en Atención de Salud/economía , Servicios de Atención de Salud a Domicilio/economía , Visita Domiciliaria/economía , Enfermeros de Salud Comunitaria/economía , Atención Posnatal/economía , Australia/epidemiología , Desarrollo Infantil/fisiología , Salud Infantil/tendencias , Preescolar , Femenino , Disparidades en Atención de Salud/tendencias , Servicios de Atención de Salud a Domicilio/tendencias , Visita Domiciliaria/tendencias , Humanos , Masculino , Enfermeros de Salud Comunitaria/tendencias , Responsabilidad Parental/tendencias , Atención Posnatal/métodos , Atención Posnatal/tendencias , Estudios Retrospectivos
13.
Women Birth ; 32(3): e351-e358, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30193913

RESUMEN

PROBLEM: Identifying pregnant women whose children are at risk of poorer development in a rapid, acceptable and feasible way. BACKGROUND: A range of antenatal psychosocial and socioeconomic risk factors adversely impact children's health, behaviour and cognition. AIM: Investigate whether a brief, waiting room survey of risk factors identifies women experiencing increased antenatal psychosocial and socioeconomic risk when asked in a private, in-home interview. METHODS: Brief 10-item survey (including age, social support, health, smoking, stress/anxious mood, education, household income, employment) collected from pregnant women attending 10 Australian public birthing hospitals, used to determine eligibility (at least 2 adverse items) for the "right@home" trial. 735 eligible women completed a private, in-home interview (including mental health, wellbeing, substance use, domestic violence, housing problems). Regression models tested for dose-response trends between the survey risk factor count and interview measures. FINDINGS: 38%, 31%, 15% and 16% of women reported a survey count of 2, 3, 4 and 5 or more adverse risk factors, respectively. Dose-response relationships were evident between the survey count and interview measures, e.g. of women with a survey count of 2, 8% reported ever having a drug problem, 4% experienced domestic violence in the last year and 10% experienced housing problems, contrasting with 31%, 31% and 26%, respectively, for women reporting a survey count of 5 or more. DISCUSSION/CONCLUSIONS: A brief, waiting room survey of psychosocial and socioeconomic risk factors concurs with a private antenatal risk factor interview, and could help health professionals quickly identify which women would benefit from more support.


Asunto(s)
Complicaciones del Embarazo/diagnóstico , Mujeres Embarazadas/psicología , Diagnóstico Prenatal/métodos , Medición de Riesgo/métodos , Encuestas y Cuestionarios/normas , Adolescente , Adulto , Australia , Estudios Transversales , Femenino , Humanos , Persona de Mediana Edad , Embarazo , Complicaciones del Embarazo/psicología , Análisis de Regresión , Reproducibilidad de los Resultados , Factores de Riesgo , Factores Socioeconómicos , Adulto Joven
14.
Case Rep Womens Health ; 20: e00082, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30364765

RESUMEN

Malignant Brenner tumor (MBT) is a rare ovarian tumor that, given the infrequency of the disease, has not been well documented in the literature. Diagnosing MBT both radiographically and histologically remains a challenge. We report two cases of ovarian MBT, detailing the clinical presentation, radiographic characteristics, and histologic findings with supplementary imaging. Our cases demonstrate the pathologic challenge of histologically diagnosing MBT versus other Brenner tumors and transitional cell carcinoma (TCC) of the ovary.

15.
Genet Med ; 20(5): 554-558, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29261187

RESUMEN

PurposeThe clinical utility of screening unselected individuals for pathogenic BRCA1/2 variants has not been established. Data on cancer risk management behaviors and diagnoses of BRCA1/2-associated cancers can help inform assessments of clinical utility.MethodsWhole-exome sequences of participants in the MyCode Community Health Initiative were reviewed for pathogenic/likely pathogenic BRCA1/2 variants. Clinically confirmed variants were disclosed to patient-participants and their clinicians. We queried patient-participants' electronic health records for BRCA1/2-associated cancer diagnoses and risk management that occurred within 12 months after results disclosure, and calculated the percentage of patient-participants of eligible age who had begun risk management.ResultsThirty-seven MyCode patient-participants were unaware of their pathogenic/likely pathogenic BRCA1/2 variant, had not had a BRCA1/2-associated cancer, and had 12 months of follow-up. Of the 33 who were of an age to begin BRCA1/2-associated risk management, 26 (79%) had performed at least one such procedure. Three were diagnosed with an early-stage, BRCA1/2-associated cancer-including a stage 1C fallopian tube cancer-via these procedures.ConclusionScreening for pathogenic BRCA1/2 variants among unselected individuals can lead to occult cancer detection shortly after disclosure. Comprehensive outcomes data generated within our learning healthcare system will aid in determining whether population-wide BRCA1/2 genomic screening programs offer clinical utility.


Asunto(s)
Bancos de Muestras Biológicas , Detección Precoz del Cáncer/métodos , Genes BRCA1 , Genes BRCA2 , Mutación , Neoplasias/diagnóstico , Neoplasias/genética , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Asociación Genética , Predisposición Genética a la Enfermedad , Mutación de Línea Germinal , Síndrome de Cáncer de Mama y Ovario Hereditario/diagnóstico , Síndrome de Cáncer de Mama y Ovario Hereditario/genética , Humanos , Persona de Mediana Edad , Linaje , Secuenciación Completa del Genoma
16.
PLoS One ; 12(10): e0186466, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29088220

RESUMEN

In species that require parental care, each parent can either care for their offspring or leave them in the care of the other parent. For each parent this creates three possible parental care strategies: biparental care, uniparental (male or female) care, and uniparental desertion by either the male or female. The burying beetle, Nicrophorus orbicollis, typically exhibits biparental care of offspring, and thus provides a unique system that allows us to compare the fitness benefits of these parental care strategies in an unconfounded way. In this study, we assess the lifetime fitness of biparental care, uniparental care, and uniparental desertion strategies in both male and female N. orbicollis. Specifically, we tested for increased fitness of the biparental care strategy compared to uniparental care strategies. Second, we test for equality of fitness between uniparental care and uniparental desertion strategies. Surprisingly, biparental care yields lower lifetime fitness for both parents compared to the other two strategies. Also, uniparental care and uniparental desertion strategies yielded equal fitness. The evolution of biparental care in this system is not consistent with the expectation of a mutual fitness benefit. We discuss other potential explanations for the evolution of biparental care in this system.


Asunto(s)
Conducta Animal , Escarabajos/fisiología , Animales , Femenino , Masculino
17.
Nucleic Acids Res ; 45(9): 5437-5448, 2017 May 19.
Artículo en Inglés | MEDLINE | ID: mdl-28158713

RESUMEN

A mRNA's translation rate is controlled by several sequence determinants, including the presence of RNA structures within the N-terminal regions of its coding sequences. However, the physical rules that govern when such mRNA structures will inhibit translation remain unclear. Here, we introduced systematically designed RNA hairpins into the N-terminal coding region of a reporter protein with steadily increasing distances from the start codon, followed by characterization of their mRNA and expression levels in Escherichia coli. We found that the mRNAs' translation rates were repressed, by up to 530-fold, when mRNA structures overlapped with the ribosome's footprint. In contrast, when the mRNA structure was located outside the ribosome's footprint, translation was repressed by <2-fold. By combining our measurements with biophysical modeling, we determined that the ribosomal footprint extends 13 nucleotides into the N-terminal coding region and, when a mRNA structure overlaps or partially overlaps with the ribosomal footprint, the free energy to unfold only the overlapping structure controlled the extent of translation repression. Overall, our results provide precise quantification of the rules governing translation initiation at N-terminal coding regions, improving the predictive design of post-transcriptional regulatory elements that regulate translation rate.


Asunto(s)
Sistemas de Lectura Abierta/genética , Biosíntesis de Proteínas , ARN Mensajero/química , Ribosomas/metabolismo , Secuencia de Bases , Fenómenos Biofísicos , Expresión Génica , Conformación de Ácido Nucleico , Iniciación de la Cadena Peptídica Traduccional , ARN Mensajero/metabolismo , Termodinámica
18.
PLoS One ; 10(11): e0143762, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26600016

RESUMEN

Organisms are selected to maximize lifetime reproductive success by balancing the costs of current reproduction with costs to future survival and fecundity. Males and females typically face different reproductive costs, which makes comparisons of their reproductive strategies difficult. Burying beetles provide a unique system that allows us to compare the costs of reproduction between the sexes because males and females are capable of raising offspring together or alone and carcass preparation and offspring care represent the majority of reproductive costs for both sexes. Because both sexes perform the same functions of carcass preparation and offspring care, we predict that they would experience similar costs and have similar life history patterns. In this study we assess the cost of reproduction in male Nicrophorus orbicollis and compare to patterns observed in females. We compare the reproductive strategies of single males and females that provided pre- and post-hatching parental care. There is a cost to reproduction for both males and females, but the sexes respond to these costs differently. Females match brood size with carcass size, and thus maximize the lifetime number of offspring on a given size carcass. Males cull proportionately more offspring on all carcass sizes, and thus have a lower lifetime number of offspring compared to females. Females exhibit an adaptive reproductive strategy based on resource availability, but male reproductive strategies are not adaptive in relation to resource availability.


Asunto(s)
Escarabajos/fisiología , Reproducción/fisiología , Animales , Femenino , Humanos , Masculino , Conducta Sexual Animal/fisiología
19.
Int J Gynecol Cancer ; 25(1): 119-24, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25415076

RESUMEN

OBJECTIVE: Chronic lymphedema (CL) after inguinal lymph node dissection (ILND) or radiotherapy (RT) is a significant problem for vulvar cancer survivors. The treatment modality or combination of therapies that poses the greatest risk is not known. The objective of this study was to describe rates of clinically significant CL conferred by different groin treatment modalities. METHODS: Medical records of vulvar cancer patients who had groin treatment with ILND, RT, or both were retrospectively reviewed. Each treated groin was considered individually, and divided into 4 treatment groups: ILND alone, ILND with adjuvant RT, neoadjuvant chemoradiation therapy (NCRT), or NCRT followed by ILND. Clinically significant CL was defined as that which required treatment and was recorded by laterality. Differences among groups were evaluated with χ(2) and Fisher exact test. RESULTS: Between 2000 and 2010, 146 patients with vulvar cancer who underwent therapy to 1 or both groins were identified for a total of 266 treated groins. The rates of CL for single-modality treatment, ILND or NCRT, were 10.9% and 6.7%, respectively. Multimodal treatment resulted in higher rates of CL, 13.5% for ILND followed by RT and 17.2% for NCRT followed by ILND, although differences were not significant (P = 0.37). CONCLUSIONS: Clinically significant CL was not different between treatment modalities in this study, but is underpowered. The results provide valuable information about treatment complications that will be useful for patient-centered counseling. Prospective evaluation of CL and its impact on quality of life is warranted.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Carcinoma de Células Escamosas/terapia , Terapia Combinada/efectos adversos , Ingle/patología , Linfedema/etiología , Neoplasias de la Vulva/terapia , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma de Células Escamosas/complicaciones , Carcinoma de Células Escamosas/patología , Enfermedad Crónica , Femenino , Estudios de Seguimiento , Humanos , Ganglios Linfáticos/patología , Linfedema/patología , Persona de Mediana Edad , Clasificación del Tumor , Estadificación de Neoplasias , Pronóstico , Estudios Retrospectivos , Neoplasias de la Vulva/complicaciones , Neoplasias de la Vulva/patología
20.
PLoS One ; 9(10): e109165, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25295755

RESUMEN

The cost of reproduction theory posits that there are trade-offs between current and future reproduction because resources that are allocated to current offspring cannot be used for future reproductive opportunities. Two adaptive reproductive strategies have been hypothesized to offset the costs of reproduction and maximize lifetime fitness. The terminal investment hypothesis predicts that as individuals age they will allocate more resources to current reproduction as a response to decreasing residual reproductive value. The reproductive restraint hypotheses predicts that as individuals age they will allocate fewer resources to current reproduction to increase the chance of surviving for an additional reproductive opportunity. In this study, we test for adaptive responses to advancing age in male burying beetles, Nicrophorus orbicollis. Burying beetles use facultative biparental care, but the male typically abandons the brood before the female. Previous work in male burying beetles has suggested several factors to explain variation in male residency time, but no study has observed male behavior throughout their entire reproductive lifetimes to determine whether males change residency time in an adaptive way with age. We compared residency time of males that reproduced biparentally, uniparentally, and on different-sized carcasses to determine if they used an adaptive reproductive strategy. Males did not increase residency time as they aged when reproducing biparentally, but decreased residency time with age when reproducing uniparentally. A decrease in parental care with age is consistent with a reproductive restraint strategy. When female age increased over time, males did not increase their residency time to compensate for deteriorating female condition. To our knowledge, this is the first test of adaptive reproductive allocation strategies in male burying beetles.


Asunto(s)
Escarabajos/fisiología , Reproducción/fisiología , Animales , Masculino , Conducta Sexual Animal/fisiología
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