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Full-Text Articles in Cell and Developmental Biology

Metabolic Control Of Stem Cell Ageing And Longevity Through Caloric Restriction, Valerie Navarrete Sep 2021

Metabolic Control Of Stem Cell Ageing And Longevity Through Caloric Restriction, Valerie Navarrete

The Yale Undergraduate Research Journal

While prior studies have identified recurring genetic patterns, gaps of knowledge still remain in existing aging mechanisms; where they originate, and how they offer insight to environmental disruptions that dictate health over time. Given the inescapability of age-related deterioration and pathology, stitching together current literature may help demystify the biological process common to all living mammals. The physiological disruption of aged tissue reflects a cellular dependence on environmental cues and historical wear. Retaining the capacity to differentiate into any cell type, a stem cell best parallels a call-and-response relationship between organ and cell. As the longest living proliferative cell in …


Tail-Anchored Protein Insertion Under Er Stress Conditions: Calcium Is Key, Matthew Jordan, Malaiyalam Mariappan Aug 2021

Tail-Anchored Protein Insertion Under Er Stress Conditions: Calcium Is Key, Matthew Jordan, Malaiyalam Mariappan

The Yale Undergraduate Research Journal

Tail-anchored (TA) membrane proteins are critical for protein translocation, intracellular trafficking, and programmed cell death. TA proteins contain hydrophobic transmembrane domains and traverse through the cytosol to post-translationally insert into cellular membranes. It is unclear how this post-translational insertion is affected by Endoplasmic Reticulum (ER) stress. Here, we find that TA protein insertion is significantly reduced with ER stress inducer thapsigargin (Tg), a calcium pump inhibitor that blocks the import of calcium into the ER causing ER stress, but not when treated with other ER stress inducers. Interestingly, out data suggests that increased calcium in the cytosol may decrease TA …


Investigating Factors That Affect Hiv-1 Capsid Stability, Max Mao, Joshua Temple Aug 2021

Investigating Factors That Affect Hiv-1 Capsid Stability, Max Mao, Joshua Temple

The Yale Undergraduate Research Journal

TKH HIV caSVLd, a SURWHLQ VKHOO cRPSRVHd RI PRQRPHULc XQLWV RI CA, IRUPV a IXOOHUHQH cRQH WKaW SURWHcWV HIV¶V YLUaO JHQRPH aQd enzymes during infection. I am interested in elucidating the factors that influence stability of the capsid shell and capturing the structural interactions between HIV capsid, host restriction factors, and small molecules using biochemical and structural biology techniques. HIV capsid shell was broken down and purified into hexamer and pentamer units for in vitro study. Structural assays were performed using X-ray crystallography and biochemical analysis was performed using pelleting assays. By understanding capsid structure with factors that confer stability, …


Altering Sensory Learning By Chronic Inactivation Of Vip Interneurons, Christopher Alba, Hannah Selwyn, Katie Ferguson, Jessica Cardin Aug 2021

Altering Sensory Learning By Chronic Inactivation Of Vip Interneurons, Christopher Alba, Hannah Selwyn, Katie Ferguson, Jessica Cardin

The Yale Undergraduate Research Journal

Vasoactive intestinal polypeptide-expressing interneurons (VIP-INs) play a key role in the regulation of cortical circuits and are implicated in perceptual function and psychiatric disease. However, their role in perceptual augmentation and learning remains understudied. We performed chronic, localized ablation of VIP-INs in the primary visual cortex of adult mice using caspase-induced apoptosis to better understand how VIP-INs contribute to visual perception and the ability to learn a visual detection task. We find that chronic VIP-IN ablation does not affect naïve performance on a full-screen visual contrast detection task. However, mice with suppressed levels of VIP-INs achieved their final expert state …


A Comparison Of The Evolution, Structure, And Function Of Sars-Cov And Sars-Cov-2 Spike Proteins, Tai Michaels Aug 2021

A Comparison Of The Evolution, Structure, And Function Of Sars-Cov And Sars-Cov-2 Spike Proteins, Tai Michaels

The Yale Undergraduate Research Journal

As the COVID-19 pandemic has developed into the largest pandemic of the twenty-first century, it has become apparent that this disease, caused by the SARS-CoV-2 virus, is unlike anything the modern world has faced before. Not only has the disease infected more than 16 million people worldwide, but its rapid spread has drawn global attention to the gaps in our understanding of its pathogenesis and the development of vaccines and treatments. One of the most important topics of research in the disease is the viral spike (S) protein which facilitates binding and entering host cells and plays a key role …


High-Spatial-Resolution Transcriptomic Map Of The Mouse Lymph Node Microenvironment Using Deterministic Barcoding, Archibald Enninful, Yang Liu, Rong Fan Aug 2021

High-Spatial-Resolution Transcriptomic Map Of The Mouse Lymph Node Microenvironment Using Deterministic Barcoding, Archibald Enninful, Yang Liu, Rong Fan

The Yale Undergraduate Research Journal

Spatial transcriptomics is an emerging approach which characterizes gene expression profiles for a more nuanced understanding of biological processes at a tissue level. This offers significant advantages over traditional omics which require the digestion of tissues and subsequent isolation of cells, during which the spatial information is completely lost. Lymph nodes are an integral part of the immune system and an in-depth analysis of its spatial organization will provide useful insights which can be applicable in the development of novel immunotherapies. In this study, the mouse lymph node is characterized using the newly developed microfluidic-based approach, Deterministic Barcoding in Tissue …


Analyzing Neuronal Dendritic Trees With Convolutional Neural Networks, Olivier Trottier, Jonathon Howard Jan 2019

Analyzing Neuronal Dendritic Trees With Convolutional Neural Networks, Olivier Trottier, Jonathon Howard

Yale Day of Data

In the biological sciences, image analysis software are used to detect, segment or classify a variety of features encountered in living matter. However, the algorithms that accomplish these tasks are often designed for a specific dataset, making them hardly portable to accomplish the same tasks on images of different biological structures. Recently, convolutional neural networks have been used to perform complex image analysis on a multitude of datasets. While applications of these networks abound in the technology industry and computer science, use cases are not as common in the academic sciences. Motivated by the generalizability of neural networks, we aim …


A Three State Model Can Explain The Dynamics Of Class Iv Drosophila Dendritic Tips, Sabyasachi Sutradhar Jan 2019

A Three State Model Can Explain The Dynamics Of Class Iv Drosophila Dendritic Tips, Sabyasachi Sutradhar

Yale Day of Data

No abstract provided.


Exploring The Ipf Lung Through The Lens Of Single Cell Rna Sequencing, Taylor Adams, Jonas Schupp Jan 2019

Exploring The Ipf Lung Through The Lens Of Single Cell Rna Sequencing, Taylor Adams, Jonas Schupp

Yale Day of Data

This poster illustrates the differences between the IPF disease-specific variety of lung macrophages and the two varieties of macrophages known to reside in the normal human lung.


Rescue Of Neocortical Circuit Deficits With Modified Bone Marrow-Derived Mesenchymal Stem Cells, Sb623, In A Rat Model Of Photothrombotic Stroke, Alexander Urry Feb 2018

Rescue Of Neocortical Circuit Deficits With Modified Bone Marrow-Derived Mesenchymal Stem Cells, Sb623, In A Rat Model Of Photothrombotic Stroke, Alexander Urry

Yale Day of Data

The following poster characterizes the effects of a novel stem cell line on treating the neural circuit deficits resulting from stroke.