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The respiratory activities of mitochondrial complexes I, II, and IV were analyzed in permeabilized Rhodotorula mucilaginosa cells and isolated mitochondria, and the kinetic parameters K 0.5 and V max were obtained. No difference in substrate affinities were found between mitochondria and permeabilized cells. The activities of the components of the mitochondrial respiratory chain of the Antarctic yeast R. mucilaginosa M94C9 were identified by in-gel activity and SDS-PAGE. The mitochondria exhibited activity for the classical components of the electron transport chain (Complexes I, II, III, and IV), and supercomplexes were formed by a combination of the respiratory complexes I, III, and IV. Unfortunately, the activities of the monomeric and dimeric forms of the F1F0-ATP synthase were not revealed by the in-gel assay, but the two forms of the ATP synthase were visualized in the SDS-PAGE. Furthermore, two alternative pathways for the oxidation of cytosolic NADH were identified: the alternative NADH dehydrogenase and the glycerol-3-phosphate dehydrogenase. In addition, an NADPH dehydrogenase and a lactate cytochrome b2 dehydrogenase were found. The residual respiratory activity following cyanide addition suggests the presence of an alternative oxidase in cells.

Neurons of the basal forebrain nucleus basalis and posterior substantia innominata (NBM/SI p ) comprise the major source of cholinergic input to the basolateral amygdala (BLA). Using a genetically encoded acetylcholine (ACh) sensor in mice, we demonstrate that BLA-projecting cholinergic neurons can 'learn' the association between a naive tone and a foot shock (training) and release ACh in the BLA in response to the conditioned tone 24 hr later (recall). In the NBM/SI p cholinergic neurons express the immediate early gene, Fos following both training and memory recall. Cholinergic neurons that express Fos following memory recall display increased intrinsic excitability. Chemogenetic silencing of these learning-activated cholinergic neurons prevents expression of the defensive behavior to the tone. In contrast, we show that NBM/SI p cholinergic neurons are not activated by an innately threatening stimulus (predator odor). Instead, VP/SI a cholinergic neurons are activated and contribute to defensive behaviors in response to predator odor, an innately threatening stimulus. Taken together, we find that distinct populations of cholinergic neurons are recruited to signal distinct aversive stimuli, demonstrating functionally refined organization of specific types of memory within the cholinergic basal forebrain of mice., Competing Interests: PR, MA, RK, RC, LJ, GL, CZ, CA, SW, AJ, ND, YL, MP, LR, DT No competing interests declared

Objectives: In recent years, increased anti-immigrant hostility has trickled into school settings creating toxic climates for immigrant-origin (I-O) students (Rogers, School and society in the age of trump , 2019, UCLA's Institute for Democracy, Education, and Access). Through youth participatory action research (yPAR), this study qualitatively examined how a class of Emerging Bilingual (EB) students aimed to promote more inclusive learning environments by designing, implementing, and evaluating a school-wide program. Here, we consider how the students experienced growth in their civic development as well as how they contended with resistances encountered during the project., Methods: The current study took place at a majority I-O, northeastern high school and was led by an EB class ( n = 20) and its teacher. Participants were as follows: on average 16.5 years; 60% female; and 65% Latinx, 30% Black, and 5% mixed-race (Black-Latino). Multiple data sources documenting the students' experiences were collected (including weekly student reflections and ethnographic field notes) and then thematically analyzed using open coding., Results: Participating students demonstrated civic development as evidenced through: growing confidence that the program could generate positive change; enhanced sense of connection toward their classmates; and increased commitment to future civic engagement. Nonetheless, some participants demonstrated initial trepidation in both disclosing their migration stories as well as the potential efficacy of engaging in the project. Furthermore, others were disappointed by the disinterest displayed by some of their peers and teachers., Conclusions: Collaborative research can support I-O youths' civic development, though, the resistances encountered and engendered illuminate possible challenges to ensure its benefits. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Little research has focused on how adolescents are faring with the national context of exclusion. Growing evidence suggests that exclusionary efforts signal messages of who belongs (and who does not) in the United States. This study draws from a risk and resilience model to understand how Latinx immigrant-origin adolescents react and adapt to social exclusion. A total of 41 adolescents between the ages of 13 to 24 (M age  = 18.85) completed a semistructured interview. Results revealed participants' use of avoidant and active coping strategies to deal with exclusion. There was a shift in coping responses across developmental stages. Future research and recommendations are provided to address systems that need to be dismantled to foster a sense of belonging for adolescents., (© 2022 Society for Research on Adolescence.)

Introduction: Twenty to 40% of Guillain Barré syndrome (GBS) patients will not be able to walk independently despite effective treatment. Older patients carry additional risks for worse outcomes., Methods: A single center, ambispective cohort study was performed. Only subjects ≥18 years with a 3-month follow-up were included. Elderly patients were considered as a whole if ≥ 60 years. Demographics, CSF and nerve conduction studies were compared. A binomial logistic regression and Kaplan-Meier analyses were carried out to estimate good prognosis (Hugues ≤2) at 3-month follow-up., Results: From 130 patients recruited, 27.6% were elderly adults. They had a more severe disease, higher mEGOS and more cranial nerve involvement. Age ≥70 years, invasive mechanical ventilation and axonal subtype, portrayed an unfavorable 3-month outcome. Further analysis demonstrated an earlier recovery in independent walk at 3 months for patients <70 years., Conclusions: Elderly patients with GBS have a more severe disease at admission and encounter worse prognosis at 3-month follow-up, especially those above 70 years., Competing Interests: Declaration of Conflicting Interests: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2021.)

To date, little research has taken a mixed-methods strategy to consider the ways in which living "in the shadows" without recognized legal status may affect mental health. In this study, we took this approach, to examine how legal status, as well as stressors (deportation worries, financial concerns) and potentially protective factors (faculty support, peer support), affect anxiety levels of undocumented Latinx undergraduates from colleges across California. We surveyed 486 participants including both standardized measures as well as open-ended responses. We found that rates of self-reported anxiety between undocumented females were 4 times that of the norm population and that of male undocumented students were 7 times higher as measured by the GAD-7 in the moderate and severe ranges. Our predictive models suggested that participants' rates of anxiety were in large part related to worries about financing their education and their daily living expenses as well as detainment and deportation; having an institutional agent such as a professor whom they can turn to for support served to buffer the effects of anxiety. Qualitative findings triangulated the quantitative findings and provided further insights into the experience of living with the stresses of social exclusion and liminal status., (Copyright © 2020 Suárez-Orozco and López Hernández.)

Background/objectives: Acute graft-versus-host disease (aGVHD) is a serious condition after allogeneic hematopoietic stem cell transplantation (HSCT), frequently involving skin, gut, and liver. It can be difficult to diagnose early, yet this is vital for adequate management. We sought to identify initial clinical and histopathological features in children with suspected GVHD and the association with clinical course and outcomes., Methods: Retrospective study of patients with skin biopsies for suspected aGVHD from 2006 to 2016. We collected demographic and clinical information, histologic, and immunohistochemical (IHC) findings, and outcomes during follow-up. Bivariate and multivariate analyses were done to identify risk factors associated with remission, development of severe/life-threatening aGVHD, and mortality., Results: We included 42 patients, 15 females. Skin manifestations occurred 51 days (median) after HSCT. On biopsy, 76.2% had mild (stage 1-2) skin aGVHD; during the course of the disease, severity and systemic involvement increased to global grade III/IV in 66.6%. All patients received treatment; 15 are in remission from aGVHD and 23 have died. Histologic features were diagnostic in 83.3%. On bivariate and multivariate analysis, we identified initial clinical and histologic findings that were associated with the measured outcomes: odds of remission from aGVHD were increased when focal vacuolar changes were found on skin biopsy (OR 6.028; 95%CI:1.253-28.992) but decreased by initial hepatic aGVHD (OR 0.112; 95%CI: 0.017-0.748); severe/life-threatening aGVHD was associated with initial gastrointestinal aGVHD (OR 6.054; 95%CI:1.257-29.159); and odds of mortality were decreased with male donor (OR 0.056; 95%CI:0.004-0.804), nulliparous female donor (OR 0.076; 95%CI:0.009-0.669), and focal vacuolar changes on skin biopsy (OR 0.113; 95%CI:0.017-0.770)., Conclusions: We found novel indicators predictive of remission, severity, and mortality in children with aGVHD. Further studies of this condition in children are needed., (© 2020 Wiley Periodicals, Inc.)

Background: Fanconi anemia (FA) (OMIM #227650) is a rare hereditary disease characterized by genomic instability. The clinical phenotype involves malformations, bone marrow failure, and cancer predisposition. Genetic heterogeneity is a remarkable feature of FA; at least 22 FANC genes are known to cooperate in a unique FA/BRCA repair pathway. A common rule on the mutations found in these genes is allelic heterogeneity, except for mutations known to have arisen from a founder effect like the FANCC c.67delG in the Dutch Mennonite Community. Here, we present an 11-year-old male patient, member of the Mennonite Community of Tamaulipas México, with a clinical and cytogenetic diagnosis of FA., Method: Chromosome fragility test was performed in all siblings. Genomic DNA was obtained from peripheral blood samples. Sanger sequencing was used to identify the FANCC c.67delG mutation (NC&#95;000009.11(NM&#95;000136.2):c.67delG p.(Asp23IlefsTer23)) and its accompanying haplotype., Results: The FANCC c.67delG mutation in 13 members of his family confirmed a FA diagnosis in two of his siblings and identified heterozygous carriers. Haplotype analysis supports that in this family, FA is caused by the founder mutation that initially appeared in Mennonite Dutch and followed this population's migrations through Canada and further to Mexico., Conclusion: The identification of the FANCC c.67delG mutation in this family not only allows proper genetic counseling, but it also grants the possibility to raise awareness of FA risk among the Mennonite community living in Mexico., (© 2019 The Authors. Molecular Genetics & Genomic Medicine published by Wiley Periodicals, Inc.)

The incidence of chronic granulomatous disease in international reports is 1:250,000; however, in Mexico it is unknown. At the National Institute of Pediatrics of Mexico a project for facilitating the diagnosis of the disease was implemented by us in 2009. From the start of such project up to date 68 cases have been studied; 80% of those are X-linked forms (LX) and moreover, it has become noticeable the diagnosis at a younger age. The new challenge we are facing its to provide a successful treatment to those patients diagnosed with chronic granulomatous disease (CGD). We are reporting the case of a one-month old newborn patient diagnosed with CGD-LX that was successfully transplanted in Mexico.

Expression of the 6 and 8 dominant-negative Ikaros isoforms in pediatric patients with acute lymphoblastic leukemia has been associated with a high risk of relapse and death; due to these isoforms disrupting the differentiation and proliferation of lymphoid cells. The aim of this study was to know the frequency of Ik6 and Ik8 in 113 Mexican ALL-children treated within the National Popular Medical Insurance Program to determine whether there was an association with relapse-free survival, event-free survival and overall survival, and to assess its usefulness in the initial stratification of patients. The expression of these isoforms was analyzed using specific primer sets and nested RT-PCR. The detected transcripts were classified according to the isoforms's sizes reported. A non-expected band of 300 bp from one patient was analyzed by sequencing. Twenty-six patients expressed Ik6 and/or Ik8 and one of them expressed a variant of Ik8 denominated Ik8-deleted. Although the presence of them was not statistically associated with lower relapse free survival (p = 0.432), event free survival (p = 0.667) or overall survival (p = 0.531), inferior overall survival was observed in patients that expressed these isoforms and showed high or standard risk by age and white blood-cell count at diagnosis. Of the 26 patients Ik6+ and/or Ik8+, 14 did not present adverse events; from them 6 were exclusively Ik6+ and/or Ik8+, and 8 were positive for the other Ikaros isoforms (Ik1, Ik2, Ik5, Ik3A, Ik4, Ik4A, Ik7). In the patients studied, the expression of Ik6 and Ik8 did not constitute an independent prognostic factor for relapse or death related to disease; therefore, they could not be used in the initial risk stratification.

Novel biomarkers for risk refinement and stratification in childhood acute lymphoblastic leukemia (ALL) are needed to optimize treatment results. We studied the expression of CASP8AP2 and H2AFZ associated with relapse and survival in bone marrow samples from newly diagnosed children with ALL. We found: (a) an increased risk for early relapse in those patients with low expression of CASP8AP2 (odds ratio [OR] 3.93, 95% confidence interval [CI] 1.40-11.02, p < 0.05) confirming its usefulness as a predictive risk marker, although H2AFZ did not present the same effect; (b) patients with low expressions of CASP8AP2 and H2AFZ had inferior survival rates (p < 0.001); (c) the predictive values regarding low expressions of H2AFZ and CASP8AP2 and high white blood cell count suggest that these features could help to identify more accurately patients at greater risk of relapse.

Juvenile polyposis of infancy is a rare genetic disorder, involving multiple hamartomatous polyps of the gastrointestinal tract, which usually has a very aggressive clinical course and is often fatal. It is characterized by early onset (during the 1st months of life) and by diffuse juvenile polyposis with anemia, recurrent gastrointestinal bleeding, diarrhea, rectal prolapse, intussusception, protein-losing enteropathy, starvation, and malnutrition. There is a hypothesis that mutation of the tumor-suppressor genes BMPR1A and PTEN, located on the long arm of chromosome 10, is associated with the development of this disease. Medical treatment for this disorder is challenging and should be conservative whenever possible. We present the case of a 3-year-old girl with juvenile polyposis of infancy who eventually died from mesenteric artery thrombosis during surgical colectomy. Karyotype of the patient showed a paracentric inversion in 10q and a deletion in 10p. We will briefly comment on some genetic considerations of this disease.