miR-203 drives breast cancer cell differentiation.

A hallmark of many malignant tumors is dedifferentiated (immature) cells bearing slight or no resemblance to the normal cells from which the cancer originated. Tumor dedifferentiated cells exhibit a higher capacity to survive to chemo and radiotherapies and have the ability to incite tumor relapse. Inducing cancer cell differentiation would abolish their self-renewal and invasive capacity and could be combined with the current standard of care, especially in poorly differentiated and aggressive tumors (with worst prognosis). However, differentiation therapy is still in its early stages and the intrinsic complexity of solid tumor heterogeneity demands innovative approaches in order to be efficiently translated into the clinic. We demonstrate here that microRNA 203, a potent driver of differentiation in pluripotent stem cells (ESCs and iPSCs), promotes the differentiation of mammary gland tumor cells. Combining mouse in vivo approaches and both mouse and human-derived tridimensional organoid cultures, we report that miR-203 influences the self-renewal capacity, plasticity and differentiation potential of breast cancer cells and prevents tumor cell growth in vivo. Our work sheds light on differentiation-based antitumor therapies and offers miR-203 as a promising tool for directly confronting the tumor-maintaining and regeneration capability of cancer cells.

Donor-Site Morbidity Following Free Fibula Flap Harvest for Mandibular or Maxillary Reconstruction in Pediatric Patients.

INTRO AND AIM: The morbidity at the donor-site in the free fibula flap is a well-studied fact in the adult population, but in children, there are few reports of the long-term adverse effects at the donor site. In this study, we evaluate donor-site morbidity, complications, and functional outcome in pediatric patients undergoing free fibula flap harvest for mandibular or maxillary reconstruction, and the relation between pain and walking abilities. METHODS: A retrospective study of 22 pediatric patients undergoing free fibula flap harvest for mandibular and maxillary reconstruction between 2003 and 2014 was conducted. A certified point evaluation system was used, analyzing several factors like pain, walking ability, restriction in activities, gait alteration, paresthesia, and cosmetic appearance, and the relationship between variables. RESULTS: Mean age follow up of patient was 8.5 years (range 2-13 years). Pain was reported in 27% (n = 6), paresthesia and numbness 9% (n = 2), walking ability alteration in 50% (n = 11), restriction in activities in 18% (n = 4), gait alteration in 23% (n = 5), and cosmetic appearance alteration in the 14% (n = 3). We compare the pain and the gait alteration and did not find any relation between pain and gait alteration (P = 0.6016) and there was no relation between restriction in activities and walking ability (P = 0.1455). CONCLUSION: Free fibula flap is the gold standard for head and neck reconstruction, but the morbidity at the donor site, especially in a growing child, should not be ignored or minimized when counseling patients and their families.More studies, with more population and with a long-term follow-up should be carried out to determine the impact on the daily activities on the pediatric population.

Counterstory methodology in a university-high school collaboration to center and humanize Latina/o voices.

Educational environments can often feel hostile and inequitable for Latina/o students and teachers, with limited resources and support to humanize their experiences. Counterstorytelling methodologies can be used by students and teachers to center lived experiences, contest deficit narratives, and uncover community cultural wealth (CCW). Drawing on a CCW lens, situated in critical race theory and Latina/o critical theory, we examine a university-high school service learning collaboration in an urban setting that focused on educational equity and counterstorytelling (5 high school classes, 80 students, and 1 teacher; 1 university class, 29 undergraduates, 1 graduate student, and 1 university professor) using ethnographic observations and reflections. In a context of relationship building and discussions of educational equity across the university-high school partnership, we engaged in a counterstorytelling process that uncovered existing CCW and helped to cultivate positive relational pedagogy (social capital) and college going culture (aspirational and navigational capital) and fostered critical reflection and hope (resistant capital). Centering the unique knowledge of students can allow the teacher to facilitate a more equitable learning environment that acknowledges students' resilience.

Identification of genes affecting milk fat and fatty acid composition in Vrindavani crossbred cattle using 50 K SNP-Chip.

The aim of this study was to identify candidate genes associated with milk fat per cent and fatty acid (FA) composition in Vrindavani cattle using the Illumina 50 K single-nucleotide polymorphism (SNP) array. After quality control, a total of 41,427 informative and high-quality SNPs were used for a genome-wide association study (GWAS) for milk fat percentage and 16 different types of fatty acids. Lactation stage, parity, test day milk yield, and proportion of exotic inheritance were included as fixed effects in the GWAS model. A total of 67 genome-wide significant (P < 1.20 × 10-06) SNPs and 176 suggestive significant (P < 2.41 × 10-05) SNPs were identified. Out of these, 15 SNPs were associated with more than one trait. The strongest associations were found on BTA14 for milk fat percentage and on BTA2 and BTA16 for polyunsaturated fatty acids. Several significant SNPs were identified close to or within the genes ELOVL6, FABP4, PMP2, PLIN1, MFGE8, GHRL2, and LDLRAD3 which are known to be associated with fat percentage and FA composition in dairy cattle breeds. This study is a step forward to better characterize the molecular mechanisms of phenotypic variation in milk fatty acids in a taurine-indicine composite cattle breed reared in tropical environments.

Reflections from novice youth participatory action researchers: Emphasis on critical gender perspectives.

Rooted in multiracial feminist theory, this research investigated the roles of adults engaged in youth participatory action research (YPAR) projects focused on developing critical perspectives of gender, power, and critical hope with the youth of color. Across 10 weeks, two novice adult facilitators documented ethnographic observations (i.e., voice memos) of their experiences collaborating with youth in YPAR. Voice memos were transcribed and coded for emergent themes. Our findings highlight how we deconstructed adultism, prioritized humanizing youth, and integrated critical gender perspectives to understand gender as a mechanism of systemic oppression. Our purpose was to capture moments of breakthroughs, realizations, and tensions as scholars contending with inexperience in YPAR and share our journey with other researchers interested in YPAR. We provide recommendations for adults to develop pathways towards humanity for the youth of color, collective resistance and take social justice action steps towards a critically hopeful future.

[Hypomagnesemia in newborns with hypoxic ischemic encephalopathy and whole-body hypothermia]. / Hipomagnesemia en recién nacidos con encefalopatía hipóxico isquémica en hipotermia corporal total.

INTRODUCTION: In newborns with the diagnosis of hypoxic-ischemic encephalopathy (HIE) treated with hypother mia, metabolic alterations are observed, which are associated with neurological prognosis. Hypo magnesemia has been reported frequently in the literature in these patients, but it is not measured or corrected in all neonatal healthcare centers. OBJECTIVE: To evaluate the frequency of hypomag nesemia and hypocalcemia in newborns with HIE treated with whole-body hypothermia and to evaluate the response to the magnesium sulfate administration. PATIENTS AND METHOD: Prospective, observational and descriptive study in hospitalized newborns with the diagnosis of HIE and trea ted with whole-body hypothermia between the years 2016 and 2017. Serial blood measurement of magnesemia (Mg) and calcemia (Ca) was performed. When presenting an Mg level < 1.8 mg/dl, supplementation with magnesium sulfate was administered to maintain levels between 1.9 and 2.8 mg/dl. The frecuency of hypomagnesemia, hypocalcemia and clinical evolution was registered. A descriptive statistical analysis was performed, with central tendency measures. RESULTS: Sixteen ca ses were included, 13 of them presented hypomagnesemia (81.3%), with early-onset (6-36 hours of life), which was normalized with magnesium sulfate treatment, receiving a second dose 4 patients. Six of 16 patients presented hypocalcemia (37.5 %). CONCLUSIONS: Hypomagnesemia is frequent (80%), similar to that described in the literature, and should be controlled and corrected early, given its physiological role, in the same way that calcium is controlled.

Longitudinal Trajectories of Family Functioning Among Recent Immigrant Adolescents and Parents: Links With Adolescent and Parent Cultural Stress, Emotional Well-Being, and Behavioral Health.

This study examined longitudinal effects of adolescent and parent cultural stress on adolescent and parent emotional well-being and health behaviors via trajectories of adolescent and parent family functioning. Recent immigrant Latino adolescents (Mage  = 14.51) and parents (Mage  = 41.09; N = 302) completed measures of these constructs. Latent growth modeling indicated that adolescent and parent family functioning remained stable over time. Early levels of family functioning predicted adolescent and parent outcomes. Baseline adolescent cultural stress predicted lower positive adolescent and parent family functioning. Latent class growth analyses produced a two-class solution for family functioning. Adolescents and parents in the low family functioning class reported low family functioning over time. Adolescents and parents in the high family functioning class experienced increases in family functioning.

Bicultural stress, coping, and psychological functioning among Mexican-descent and White college students.

OBJECTIVE: The present study investigates associations between bicultural stress, coping, and responses to stress (RTS) in relation to depressive symptoms and self-esteem for Mexican-descent and non-Latinx White college students. METHOD: With a sample of 268 Mexican-descent and non-Latinx White college students, two multiple-mediation path models and two moderation models are examined. RESULTS: The hypothesized mediation models were both supported indicating higher bicultural stress is associated with higher reporting of engaged and disengaged forms of coping and RTS. Engaged coping was associated with mental health resiliency while disengaged coping and RTS contributed to vulnerability. Disengaged and secondary engaged coping were mediators in the depressive symptoms and self-esteem models. In terms of moderation, disengaged coping and RTS were both moderators in the bicultural stress-depressive symptoms relationships. CONCLUSIONS: College students' reactions to bicultural stress may either promote mental health resiliency through engaged strategies or increase vulnerability through disengaged coping and involuntary RTS.

Longitudinal Effects of Latino Parent Cultural Stress, Depressive Symptoms, and Family Functioning on Youth Emotional Well-Being and Health Risk Behaviors.

U.S. Latino parents can face cultural stressors in the form of acculturative stress, perceived discrimination, and a negative context of reception. It stands to reason that these cultural stressors may negatively impact Latino youth's emotional well-being and health risk behaviors by increasing parents' depressive symptoms and compromising the overall functioning of the family. To test this possibility, we analyzed data from a six-wave longitudinal study with 302 recently immigrated (<5 years in the United States) Latino parents (74% mothers, Mage  = 41.09 years) and their adolescent children (47% female, Mage  = 14.51 years). Results of a cross-lagged analysis indicated that parent cultural stress predicted greater parent depressive symptoms (and not vice versa). Both parent cultural stress and depressive symptoms, in turn, predicted lower parent-reported family functioning, which mediated the links from parent cultural stress and depressive symptoms to youth alcohol and cigarette use. Parent cultural stress also predicted lower youth-reported family functioning, which mediated the link from parent cultural stress to youth self-esteem. Finally, mediation analyses indicated that parent cultural stress predicted youth alcohol use by a way of parent depressive symptoms and parent-reported family functioning. Our findings point to parent depressive symptoms and family functioning as key mediators in the links from parent cultural stress to youth emotional well-being and health risk behaviors. We discuss implications for research and preventive interventions.

Personal Identity Development in Hispanic Immigrant Adolescents: Links with Positive Psychosocial Functioning, Depressive Symptoms, and Externalizing Problems.

The present study was designed to examine trajectories of personal identity coherence and confusion among Hispanic recent-immigrant adolescents, as well as the effects of these trajectories on psychosocial and risk-taking outcomes. Personal identity is extremely important in anchoring young immigrants during a time of acute cultural change. A sample of 302 recently immigrated (5 years or less in the United States at baseline) Hispanic adolescents (Mage = 14.51 years at baseline; SD = 0.88 years, range 14-17) from Miami and Los Angeles (47 % girls) completed measures of personal identity coherence and confusion at the first five waves of a six-wave longitudinal study; and reported on positive psychosocial functioning, depressive symptoms, and externalizing problems at baseline and at Time 6. Results indicated that identity coherence increased linearly across time, but that there were no significant changes in confusion over time and no individual differences in confusion trajectories. Higher baseline levels of, and improvements in, coherence predicted higher levels of self-esteem, optimism, and prosocial behavior at the final study timepoint. Higher baseline levels of confusion predicted lower self-esteem, greater depressive symptoms, more aggressive behavior, and more rule breaking at the final study timepoint. These results are discussed in terms of the importance of personal identity for Hispanic immigrant adolescents, and in terms of implications for intervention.

A Longitudinal Test of the Parent-Adolescent Family Functioning Discrepancy Hypothesis: A Trend toward Increased HIV Risk Behaviors Among Immigrant Hispanic Adolescents.

Parent-adolescent discrepancies in family functioning play an important role in HIV risk behaviors among adolescents, yet longitudinal research with recent immigrant Hispanic families remains limited. This study tested the effects of trajectories of parent-adolescent family functioning discrepancies on HIV risk behaviors among recent-immigrant Hispanic adolescents. Additionally, we examined whether and to what extent trajectories of parent-adolescent family functioning discrepancies vary as a function of gender. We assessed family functioning of 302 Hispanic adolescents (47 % female) and their parent (70 % female) at six time points over a three-year period and computed latent discrepancy scores between parent and adolescent reports at each timepoint. Additionally, adolescents completed measures of sexual risk behaviors and alcohol use. We conducted a confirmatory factor analysis to determine the feasibility of collapsing parent and adolescent reported family functioning indicators onto a single latent discrepancy variable, tested model invariance over time, and conducted growth mixture modeling (GMM). GMM yielded a three-class solution for discrepancies: High-Increasing, High-Stable, and Low-Stable. Relative to the Low-Stable class, parent-adolescent dyads in the High-Increasing and High-Stable classes were at greater risk for adolescents reporting sexual debut at time 6. Additionally, the High-Stable class was at greater risk, relative to the Low-Stable class, in terms of adolescent lifetime alcohol use at 30 months post-baseline. Multiple group GMM indicated that trajectories of parent-adolescent family functioning trajectories did not vary by gender. Implications for future research and practice are discussed.

A process-oriented analysis of parent acculturation, parent socio-cultural stress, family processes, and Latina/o youth smoking and depressive symptoms.

Latina/o youth in the U.S. are often characterized by elevated rates of cigarette smoking and depressive symptoms, and these rates appear to vary by youth acculturation and socio-cultural stress. Scholars suggest that parents' cultural experiences may be important determinants of youth smoking and depressive symptoms. However, few studies have examined the influence of parent acculturation and related stressors on Latina/o youth smoking and depressive symptoms. To address this gap in the literature, in the current study we investigated how parent-reported acculturation, perceived discrimination, and negative context of reception affect youth smoking and depressive symptoms through parent reports of familism values and parenting. The longitudinal (4 waves) sample consisted of 302 Latina/o parent-adolescent dyads from Los Angeles (N = 150) and Miami (N = 152). Forty-seven percent of the adolescent sample was female (M age = 14.5 years), and 70% of the parents were mothers (M age = 41.10 years). Parents completed measures of acculturation, perceived discrimination, negative context of reception, familism values, and parenting. Youth completed measures regarding their smoking and symptoms of depression. Structural equation modeling suggested that parents' collectivistic values (Time 1) and perceived discrimination (Time 1) predicted higher parental familism (Time 2), which in turn, predicted higher levels of positive/involved parenting (Time 3). Positive/involved parenting (Time 3), in turn, inversely predicted youth smoking (Time 4). These findings indicate that parents' cultural experiences play important roles in their parenting, which in turn appears to influence Latino/a youth smoking. This study highlights the need for preventive interventions to attend to parents' cultural experiences in the family (collectivistic values, familism values, and parenting) and the community (perceived discrimination).

Depressive symptoms and externalizing behaviors among Hispanic immigrant adolescents: Examining longitudinal effects of cultural stress.

This study examined longitudinal effects of cultural stress (a latent factor comprised of bicultural stress, ethnic discrimination, and negative context of reception) on depressive symptoms and a range of externalizing behaviors among recently (≤5 years in the U.S. at baseline) immigrated Hispanic adolescents. A sample of 302 adolescents (53% boys; mean age 14.51 years) completed baseline measures of perceived ethnic discrimination, bicultural stress, and perceived negative context of reception; and outcome measures of depressive symptoms, cigarette smoking, alcohol use, aggressive behavior, and rule-breaking behavior six months post-baseline. A path analysis indicated that higher cultural stress scores predicted higher levels of all outcomes. These effects were consistent across genders, but varied by study site. Specifically, higher cultural stress scores increased depressive symptoms among participants in Miami, but not in Los Angeles. Findings suggest that cultural stress is a clinically relevant predictor of depressive symptoms and externalizing behaviors among Hispanic immigrant adolescents.

Natural selection and the genetic basis of osmoregulation in heteromyid rodents as revealed by RNA-seq.

One adaptation of ecological and evolutionary interest is the extraordinary ability of desert rodents to retain water during waste production. Much is known regarding the unique kidney physiology of kangaroo rats (Dipodomys spp.) and their ability to retain water during waste production, yet the genetic basis of these physiological adaptations is relatively unknown. Herein, we utilized RNA-seq data to conduct a comparative study to identify osmoregulatory genes expressed in heteromyid rodents. We sequenced kidney tissue from two temperate desert species (Dipodomys spectabilis and Chaetodipus baileyi) from two separate subfamilies of the Heteromyidae and compared these transcriptomes to a tropical mesic species (Heteromys desmarestianus) from a third subfamily. The evolutionary history of these subfamilies provided a robust phylogenetic control that allowed us to separate shared evolutionary history from convergence. Using two methods to detect differential expression (DE), we identified 1890 genes that showed consistent patterns of DE between the arid and mesic species. A three-species reciprocal BLAST analysis revealed 3511 sets of putative orthologues that, upon comparison to known Mus musculus sequences, revealed 323 annotated and full-length genic regions. Selection tests displayed evidence of positive selection (dn/ds > 1) on six genes in the two desert species and remained significant for one of these genes after correction for multiple testing. Thus, our data suggest that both the coding sequence and expression of genes have been shaped by natural selection to provide the genetic architecture for efficient osmoregulation in desert-adapted heteromyid rodents.

[Toxic fungi in Buenos Aires City and surroundings]. / Hongos tóxicos en la Ciudad de Buenos Aires y alrededores.

In Facultad de Ciencias Exactas y Naturales,Universidad de Buenos Aires there is a service called Servicio de Identificación de Hongos Tóxicos, directed by researchers of the Program of Medicinal Plants and Fungi Involved in Biological Degradation (PROPLAME-PRHIDEB, CONICET) that assist hospitals and other health establishments, identifying the different samples of fungi and providing information about their toxicity, so that patients can receive the correct treatment. The objective of the present study was to analyze all the cases received from 1985 to 2012. This analysis permitted the confection of a table identifying the most common toxic species. The information gathered revealed that 47% of the patients were under 18 years of age and had eaten basidiomes; the remaining 53% were adults who insisted that they were able to distinguish edible from toxic mushrooms. Chlorophyllum molybdites turned out to be the main cause of fungal intoxication in Buenos Aires, which is commonly confused with Macrolepiota procera, an edible mushroom. In the second place Amanita phalloides was registered, an agaric known to cause severe symptoms after a long period of latency (6-10 hours), and which can lead to hepatic failure even requiring a transplant to prevent severe internal injuries or even death, is not early and correctly treated.

Prophylactic fluconazole protocol in very low birth weight infants: invasive candidiasis prevention in a Latin American neonatal intensive care unit.

OBJECTIVE: To evaluate the effect of prophylactic fluconazole for very low birth weight infants (VLBWI) in a neonatal intensive care unit (NICU) with a 7.8% incidence of invasive candidiasis (IC). STUDY DESIGN: Interventional pre-post cohort study comparing 2 years with and without fluconazole prophylaxis protocol (2016-2018 = 228 infants and 2019-2021 = 125 infants). Fluconazole was administered to all extremely low birth weight infants (ELBWI) and infants with BW 1001-1500 g with risk factors or positive carrier cultures. Liver function tests were performed weekly. RESULTS: The incidence of IC decreased from 7.8% to 2.4% (OR:0.3, p = 0.05) with the use of prophylactic fluconazole for VLBWI and in ELBWI decreased from 16,7% to 3,7% (OR:0.1, p = 0.04). No significant differences were seen in mortality. CONCLUSIONS: Fluconazole is a safe, effective, and feasible strategy to prevent IC in a Latin American country.

Best Practice Strategies for Retaining Faculty During Times of Rapid Change.

Faculty retention is an issue of concern to schools and colleges of pharmacy. The reasons why faculty leave are multifactorial but often involve a breach of unwritten contract obligations between the faculty member and the organization. This article provides strategies for retaining faculty based on published literature that include perceived breaches of unwritten contracts and our own perspectives as departmental and university administrators and senior faculty members who have been involved in devising and implementing institutional change. Retention begins with recruitment but then needs to be nurtured during onboarding and as part of the overall enculturation process for new faculty members. Particular attention to the factors that influence the retention of underrepresented minorities must be incorporated to help ensure that pharmacy educators reflect the diversity of the US population.

Subcellular positioning during cell division and cell plate formation in maize.

Introduction: During proliferative plant cell division, the new cell wall, called the cell plate, is first built in the middle of the cell and then expands outward to complete cytokinesis. This dynamic process requires coordinated movement and arrangement of the cytoskeleton and organelles. Methods: Here we use live-cell markers to track the dynamic reorganization of microtubules, nuclei, endoplasmic reticulum, and endomembrane compartments during division and the formation of the cell plate in maize leaf epidermal cells. Results: The microtubule plus-end localized protein END BINDING1 (EB1) highlighted increasing microtubule dynamicity during mitosis to support rapid changes in microtubule structures. The localization of the cell-plate specific syntaxin KNOLLE, several RAB-GTPases, as well as two plasma membrane localized proteins was assessed after treatment with the cytokinesis-specific callose-deposition inhibitor Endosidin7 (ES7) and the microtubule-disrupting herbicide chlorpropham (CIPC). While ES7 caused cell plate defects in Arabidopsis thaliana, it did not alter callose accumulation, or disrupt cell plate formation in maize. In contrast, CIPC treatment of maize epidermal cells occasionally produced irregular cell plates that split or fragmented, but did not otherwise disrupt the accumulation of cell-plate localized proteins. Discussion: Together, these markers provide a robust suite of tools to examine subcellular trafficking and organellar organization during mitosis and cell plate formation in maize.