Do Induced Pluripotent Stem Cells Resolve the Ethical and Legal Issues Generated by Human Embryonic Stem Cells?

The field of stem cell technology has seen an exponential growth over the last decade. Due to this, little attention has been paid as to whether this new technology adequately improves on previous research models, or indeed if it causes any ethical or legal issues itself. Of particular interest is whether Induced Pluripotent Stem Cells resolve the ethical and legal issues which have been generated by Human Embryonic Stem Cells. The ethical issues of note relate to the definition of personhood and moral status, the debate on when these can be ascribed, the consequences of utilising embryos for research, and whether the new method of inducing pluripotency stimulates any ethical issues itself. The central legal issues revolve around the diverse regulations which guide current research around the world, legal definitions regarding a child’s right to life, whether such a right exists, the scope of consent, the limits of confidentiality, as well as whether current patent guidelines adequately stimulate research into this important area of medical development. The expected outcome of this exploration is that where induced pluripotency may appear to alleviate most of the ethical issues raised by human embryonic stem cells, the same may not be affirmed to a similar extent in the legal sphere, rather it is suggested that the employment of this new alternative method of creating stem cells may complicate the legal matters further. It is recommended that further investigation to harmonizing legal definitions as well as updating current regulations occurs, in order to avoid the exploitation of potentially vulnerable groups of the population

Can We Predict Who Tries E-Cigarettes?

Background: Since the emergence of e-cigarettes in the United States in 2007, the aerosol-delivery devices have become the most commonly used tobacco product among U.S. youth. This trend puts decades of work deterring young people from cigarettes in jeopardy and increases the risk of exposing a new generation of young people to nicotine. Researchers need to know what behaviors to target and who is at greatest risk in order to act upon the U.S. surgeon general’s 2018 call to action. Method: This study examined a variety of factors that have the potential to differentiate college students on their e-cigarette use. The sample for this study consisted of 1,083 college students ranging in age between 18 and 42 (Mage = 20.04, SDage = 2.57; 75.3% female; 40.5% Black). A variety of personality, environment, and behavioral factors were examined for their ability to sort students into two user groups based on their lifetime use of e-cigarettes, with participants who indicated having ever tried e-cigarettes being coded as ever users (n = 410, 37.9%). A recursive partition analysis (RPA) was used to assess which factors best separate students based on if they ever used e-cigarettes. Results: RPA creates a hierarchy of variables that determine the e-cigarette user category in order of strength. Positive-negative functions discrepancy and past use of cannabis emerged as the most important factors able to differentiate students as never users and ever users. Positive-negative functions discrepancy is the difference in endorsed positive reasons to use e-cigarettes and negative reasons to not use e-cigarettes. Conclusion: Results indicate that students who report less negative and more positive functions of e-cigarettes and have used cannabis are e-cigarette ever users. Policy makers and interventionists should use this information to reduce the risk of using e-cigarettes among young people.https://digitalcommons.odu.edu/gradposters2023_healthsciences/1014/thumbnail.jp

Whose Land Is It Anyway? Navigating Ghana\u27s Complex Land System

This Article dives into Ghana’s complex land-registration system, which is influenced by both statutory and customary law. Section II discusses Ghana’s statutory land laws. Section III provides a brief overview of Ghana’s customary land laws. Section IV discusses several obstacles within Ghana’s land-administration system

Orbito-frontal cortex is necessary for temporal context memory

Lesion and neuroimaging studies suggest that orbito-frontal cortex (OFC) supports temporal aspects of episodic memory. However, it is unclear whether OFC contributes to the encoding and/or retrieval of temporal context and whether it is selective for temporal relative to nontemporal (spatial) context memory. We addressed this issue with two complimentary studies: functional magnetic resonance imaging to measure OFC activity associated with successful temporal and spatial context memory during encoding and retrieval in healthy young participants, and a neuropsychological investigation to measure changes in spatial and temporal context memory in OFC lesion patients. Imaging results revealed that OFC contributed to encoding and retrieval of associations between objects and their temporal but not their spatial contexts. Consistent with this, OFC patients exhibited impairments in temporal but not spatial source memory accuracy. These results suggest that OFC plays a critical role in the formation and subsequent retrieval of temporal context

Are happy drivers safer drivers? Evidence from hazard response times and eye tracking data

Previous research shows that negative emotions have a detrimental effect on cognitive processes in general and on driving safety in particular. However to date, there has been no empirical investigation of the impact that positive emotions might have on driving safety. This research examined the influence of mood on driving safety using hazard perception videos and an eye tracker. Participants’ mood was manipulated (Sad, Neutral, Happy) after which they observed videos containing a number of potential hazards. Hazard response times and eye fixations were measured. The Sad mood affected drivers the most, with the longest response times and fixation durations. The effects of the Happy mood were less clear, suggesting that apart from emotional valence, emotional arousal should be considered. In addition, hazard response times differed as a function of hazard onset (i.e. unexpected or developing hazard) and type of hazard (i.e. human, car). The results are interpreted in terms of theories of positive emotions and psychological arousal

Clinical resistance to crenolanib in acute myeloid leukemia due to diverse molecular mechanisms.

FLT3 mutations are prevalent in AML patients and confer poor prognosis. Crenolanib, a potent type I pan-FLT3 inhibitor, is effective against both internal tandem duplications and resistance-conferring tyrosine kinase domain mutations. While crenolanib monotherapy has demonstrated clinical benefit in heavily pretreated relapsed/refractory AML patients, responses are transient and relapse eventually occurs. Here, to investigate the mechanisms of crenolanib resistance, we perform whole exome sequencing of AML patient samples before and after crenolanib treatment. Unlike other FLT3 inhibitors, crenolanib does not induce FLT3 secondary mutations, and mutations of the FLT3 gatekeeper residue are infrequent. Instead, mutations of NRAS and IDH2 arise, mostly as FLT3-independent subclones, while TET2 and IDH1 predominantly co-occur with FLT3-mutant clones and are enriched in crenolanib poor-responders. The remaining patients exhibit post-crenolanib expansion of mutations associated with epigenetic regulators, transcription factors, and cohesion factors, suggesting diverse genetic/epigenetic mechanisms of crenolanib resistance. Drug combinations in experimental models restore crenolanib sensitivity.This work was supported in part by The Leukemia & Lymphoma Society Beat AML Program, the V Foundation for Cancer Research, the Gabrielle’s Angel Foundation for Cancer Research and the National Cancer Institute (1R01CA183947–01; 1U01CA217862–01; 1U54CA224019-01; 3P30CA069533-18S5). H.Z. received a Collins Medical Trust research grant. S.D.B. was supported by the National Cancer Institute (5R01CA138744-08)

High-resolution mapping reveals topologically distinct cellular pools of phosphatidylserine

Phosphatidylserine exists lumenally in the ER, Golgi, and mitochondria but cytoplasmically in the trans-Golgi and at the plasma membrane, which suggests that functionally important flipping may occur during trafficking

The influence of driver’s mood on car following and glance behaviour: Using cognitive load as an intervention

Driving safety relies on a driver’s ability to maintain their attentional focus and that mood is one of the factors which influences this ability. This driving simulator study used mind wandering theory to understand the changes in car following behaviour and driver glance patterns when affected by neutral, happy, sad and angry moods during car following. Two types of cognitive load were used to investigate ways of disengaging drivers from the mind wandering state. The moods were induced via music and mental imagery and assessed via self-reports and physiological measures. The results show that mood valence and arousal have different effects on driving safety, with negative moods resulting in the most dangerous driving, regardless of arousal. The cognitive load, in some cases, disengaged drivers from mood-related mind wandering. However, more detailed research is needed to understand the amount of load necessary for this disengagement in different moods. The importance of using driving-related measures together with glance patterns in mood research was highlighted to overcome ambiguities resulting from conclusions based on single measurements

Multiorgan MRI findings after hospitalisation with COVID-19 in the UK (C-MORE): a prospective, multicentre, observational cohort study

Introduction: The multiorgan impact of moderate to severe coronavirus infections in the post-acute phase is still poorly understood. We aimed to evaluate the excess burden of multiorgan abnormalities after hospitalisation with COVID-19, evaluate their determinants, and explore associations with patient-related outcome measures. Methods: In a prospective, UK-wide, multicentre MRI follow-up study (C-MORE), adults (aged ≥18 years) discharged from hospital following COVID-19 who were included in Tier 2 of the Post-hospitalisation COVID-19 study (PHOSP-COVID) and contemporary controls with no evidence of previous COVID-19 (SARS-CoV-2 nucleocapsid antibody negative) underwent multiorgan MRI (lungs, heart, brain, liver, and kidneys) with quantitative and qualitative assessment of images and clinical adjudication when relevant. Individuals with end-stage renal failure or contraindications to MRI were excluded. Participants also underwent detailed recording of symptoms, and physiological and biochemical tests. The primary outcome was the excess burden of multiorgan abnormalities (two or more organs) relative to controls, with further adjustments for potential confounders. The C-MORE study is ongoing and is registered with ClinicalTrials.gov, NCT04510025. Findings: Of 2710 participants in Tier 2 of PHOSP-COVID, 531 were recruited across 13 UK-wide C-MORE sites. After exclusions, 259 C-MORE patients (mean age 57 years [SD 12]; 158 [61%] male and 101 [39%] female) who were discharged from hospital with PCR-confirmed or clinically diagnosed COVID-19 between March 1, 2020, and Nov 1, 2021, and 52 non-COVID-19 controls from the community (mean age 49 years [SD 14]; 30 [58%] male and 22 [42%] female) were included in the analysis. Patients were assessed at a median of 5·0 months (IQR 4·2–6·3) after hospital discharge. Compared with non-COVID-19 controls, patients were older, living with more obesity, and had more comorbidities. Multiorgan abnormalities on MRI were more frequent in patients than in controls (157 [61%] of 259 vs 14 [27%] of 52; p<0·0001) and independently associated with COVID-19 status (odds ratio [OR] 2·9 [95% CI 1·5–5·8]; padjusted=0·0023) after adjusting for relevant confounders. Compared with controls, patients were more likely to have MRI evidence of lung abnormalities (p=0·0001; parenchymal abnormalities), brain abnormalities (p<0·0001; more white matter hyperintensities and regional brain volume reduction), and kidney abnormalities (p=0·014; lower medullary T1 and loss of corticomedullary differentiation), whereas cardiac and liver MRI abnormalities were similar between patients and controls. Patients with multiorgan abnormalities were older (difference in mean age 7 years [95% CI 4–10]; mean age of 59·8 years [SD 11·7] with multiorgan abnormalities vs mean age of 52·8 years [11·9] without multiorgan abnormalities; p<0·0001), more likely to have three or more comorbidities (OR 2·47 [1·32–4·82]; padjusted=0·0059), and more likely to have a more severe acute infection (acute CRP >5mg/L, OR 3·55 [1·23–11·88]; padjusted=0·025) than those without multiorgan abnormalities. Presence of lung MRI abnormalities was associated with a two-fold higher risk of chest tightness, and multiorgan MRI abnormalities were associated with severe and very severe persistent physical and mental health impairment (PHOSP-COVID symptom clusters) after hospitalisation. Interpretation: After hospitalisation for COVID-19, people are at risk of multiorgan abnormalities in the medium term. Our findings emphasise the need for proactive multidisciplinary care pathways, with the potential for imaging to guide surveillance frequency and therapeutic stratification