All Publications


  • Rotations. Families, systems & health : the journal of collaborative family healthcare Mlambo, V. C. 2023; 41 (3): 405-406

    Abstract

    The author expresses themselves with poetry about their medical education, experiences, and rotations. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

    View details for DOI 10.1037/fsh0000784

    View details for PubMedID 37732982

  • Chronic social stress blunts core body temperature and molecular rhythms of Rbm3 and Cirbp in mouse lateral habenula OPEN BIOLOGY Haniffa, S., Narain, P., Hughes, M., Petkovic, A., Susic, M., Mlambo, V., Chaudhury, D. 2023; 13 (7): 220380

    Abstract

    Chronic social stress in mice causes behavioural and physiological changes that result in perturbed rhythms of body temperature, activity and sleep-wake cycle. To further understand the link between mood disorders and temperature rhythmicity in mice that are resilient or susceptible to stress, we measured core body temperature (Tcore) before and after exposure to chronic social defeat stress (CSDS). We found that Tcore amplitudes of stress-resilient and susceptible mice are dampened during exposure to CSDS. However, following CSDS, resilient mice recovered temperature amplitude faster than susceptible mice. Furthermore, the interdaily stability (IS) of temperature rhythms was fragmented in stress-exposed mice during CSDS, which recovered to control levels following stress. There were minimal changes in locomotor activity after stress exposure which correlates with regular rhythmic expression of Prok2 - an output signal of the suprachiasmatic nucleus. We also determined that expression of thermosensitive genes Rbm3 and Cirbp in the lateral habenula (LHb) were blunted 1 day after CSDS. Rhythmic expression of these genes recovered 10 days later. Overall, we show that CSDS blunts Tcore and thermosensitive gene rhythms. Tcore rhythm recovery is faster in stress-resilient mice, but Rbm3 and Cirbp recovery is uniform across the phenotypes.

    View details for DOI 10.1098/rsob.220380

    View details for Web of Science ID 001030703500002

    View details for PubMedID 37463657

    View details for PubMedCentralID PMC10353891

  • Impact of Abnormal Potassium on Arrhythmia Risk During Pediatric Digoxin Therapy. Pediatric cardiology Mlambo, V. C., Algaze, C. A., Mak, K., Collins, R. T. 2022

    Abstract

    Digoxin is used in children with heart failure and tachyarrhythmia. Its use in patients with single ventricle anatomy has increased following evidence of improved interstage survival after the Norwood procedure. Digoxin has a narrow therapeutic window and may alter serum potassium balance, inducing arrhythmias. We hypothesized digoxin use in the setting of abnormal serum potassium levels is associated with arrhythmias. We reviewed all patients≤18years who received digoxin while admitted at our institution from 2014 to 2021. Admissions<2 nights were excluded. We compared patients with a hemodynamically significant arrhythmia to those without. We performed adjusted mixed-effects logistic regression with arrhythmia as the outcome variable and potassium status as the predictor variable; adjusting for weight, route of digoxin administration, digoxin indication, serum creatinine, and number of interacting drugs prescribed. Abnormal potassium was defined as serum levels<3.5mmol/L or>6.0mmol/L. There were 268 encounters in 171 patients. Potassium levels were abnormal in 75.5% of patients who experienced an arrhythmia during digoxin administration, compared to 42.6% who did not (p<0.001). Odds of arrhythmia was 138% higher in patients with abnormal potassium receiving digoxin (AOR=2.38, 95% CI 1.07-5.29, p=0.03). Receiving intravenous digoxin was also associated with a 7.35 odds of cardiac arrhythmia (AOR 7.35, p=0.006, 95% CI 1.79-30.26). Odds of arrhythmia is increased during digoxin administration when pediatric patients have abnormal potassium levels. Vigilant attention to potassium levels is essential to prevent adverse outcomes during digoxin therapy.

    View details for DOI 10.1007/s00246-022-03051-3

    View details for PubMedID 36403164

  • #PauseBeforeYouPost: Ethical and Legal Issues Involving Medical Social Media. Seminars in interventional radiology Keller, E. J., Mlambo, V. C., Resnick, S. A., Vogelzang, R. L. 2022; 39 (2): 203-206

    View details for DOI 10.1055/s-0042-1745717

    View details for PubMedID 35781993

  • Inclusion of children with disabilities in qualitative health research: A scoping review. PloS one Njelesani, J., Mlambo, V., Denekew, T., Hunleth, J. 2022; 17 (9): e0273784

    Abstract

    BACKGROUND: Children with disabilities have the right to participate in health research so their priorities, needs, and experiences are included. Health research based primarily on adult report risks misrepresenting children with disabilities and their needs, and contributes to exclusion and a lack of diversity in the experiences being captured. Prioritizing the participation of children with disabilities enhances the relevance, meaningfulness, and impact of research.METHODS: A scoping review was conducted to critically examine the participation of children with disabilities in qualitative health research. The electronic databases PubMed, PsychInfo, Embase, and Google Scholar were searched. Inclusion criteria included qualitative health studies conducted with children with disabilities, published between 2007 and 2020, and written in English. Articles were screened by two reviewers and the synthesis of data was performed using numeric and content analysis.RESULTS: A total of 62 studies met inclusion criteria. Rationales for including children with disabilities included child-focused, medical model of disability, and disability rights rationales. Participation of children with disabilities in qualitative health research was limited, with the majority of studies conducting research on rather than in partnership with or by children. Findings emphasize that children with disabilities are not participating in the design and implementation of health research.CONCLUSION: Further effort should be made by health researchers to incorporate children with a broad range of impairments drawing on theory and methodology from disability and childhood studies and collaborating with people who have expertise in these areas. Furthermore, an array of multi-method inclusive, accessible, adaptable, and non-ableist methods should be available to enable different ways of expression.

    View details for DOI 10.1371/journal.pone.0273784

    View details for PubMedID 36048816

  • The ethics of #MedTwitter and medical social media Mlambo, V. C., Hwang, G. L., Keller , E. J. IR Quarterly. 2021
  • What it takes to be at the top: The interrelationship between chronic social stress and social dominance BRAIN AND BEHAVIOR Sabanovic, M., Liu, H., Mlambo, V., Aqel, H., Chaudhury, D. 2020: e01896

    Abstract

    Dominance hierarchies of social animal groups are very sensitive to stress. Stress experienced prior to social interactions between conspecifics may be a determinant of their future social dynamics. Additionally, long-term occupancy of a specific hierarchical rank can have psychophysiological effects which increase vulnerability to future stressors.We aimed to delineate differential effects of stress acting before or after hierarchy formation. We studied whether exposure to the chronic social defeat stress (CSDS) paradigm before a two-week-long hierarchy formation affected the attainment of a dominant status using the social confrontation tube test (TT). These animals were singly housed for at least one week before CSDS to decrease confounding effects of prior hierarchy experience. Additionally, we investigated whether social rank predicted vulnerability to CSDS, measured by a social interaction test.In TT, mice termed as dominant (high rank) win the majority of social confrontations, while the subordinates (low rank) lose more often. Within newly established hierarchies of stress-naïve mice, the subordinate, but not dominant, mice exhibited significantly greater avoidance of novel social targets. However, following exposure to CSDS, both lowest- and highest-ranked mice exhibited susceptibility to stress as measured by decreased interactions with a novel social target. In contrast, after CSDS, both stress-susceptible (socially avoidant) and stress-resilient (social) mice were able to attain dominant ranks in newly established hierarchies.These results suggest that the response to CSDS did not determine social rank in new cohorts, but low-status mice in newly established groups exhibited lower sociability to novel social targets. Interestingly, exposure of a hierarchical social group to chronic social stress led to stress susceptibility in both high- and low-status mice as measured by social interaction.

    View details for DOI 10.1002/brb3.1896

    View details for Web of Science ID 000578378700001

    View details for PubMedID 33070476