General Surgery Twitter during COVID-19: Tweets, Trends, and Implications for Recruitment Strategies.

BACKGROUND: The COVID-19 pandemic has disrupted traditional resident recruitment practices, requiring virtual interviews and new forms of outreach. Social media, such as Twitter, is one tool programs can use to connect with applicants. This study sought to assess changes in Twitter use during the COVID-19 pandemic among general surgery programs. METHODS: Twitter and residency program websites were queried for public Twitter accounts related to general surgery residency programs. Publicly available tweets for available accounts were reviewed for all posts for the period March 15, 2019-November 25, 2020. Thematic analysis of each tweet was performed, and engagement was determined by likes and retweets on each tweet. RESULTS: The number of programs with active Twitter accounts increased after the onset of COVID-19 pandemic, as did the number of tweets, likes-, and retweets-per-tweet. There was a significant increase in the number of tweets regarding resident promotion, program promotion, and virtual event promotion. Tweets received more likes-per-tweet if the subject was program promotion and resident promotion than tweets regarding virtual events. All results were statistically significant (P < .05). DISCUSSION: Twitter use and engagement with residency programs have increased significantly since pandemic onset. Engagement is highest for tweets regarding program and resident promotion as measured by likes-per-tweet and highest for program promotion and virtual events as measured by retweets-per-tweet. Given the nearly nationwide increase in Twitter engagement after pandemic onset, programs should consider the impact of Twitter as a means of communication with applicants and program branding.

Identification and Characterization of Preferred DNA-Binding Sites for the Thermus thermophilus HB8 Transcriptional Regulator TTHA0973.

Advances in genomic sequencing have allowed the identification of a multitude of genes encoding putative transcriptional regulatory proteins. Lacking, often, is a fuller understanding of the biological roles played by these proteins, the genes they regulate or regulon. Conventionally this is achieved through a genetic approach involving putative transcription factor gene manipulation and observations of changes in an organism's transcriptome. However, such an approach is not always feasible or can yield misleading findings. Here, we describe a biochemistry-centric approach, involving identification of preferred DNA-binding sequences for the Thermus thermophilus HB8 transcriptional repressor TTHA0973 using the selection method Restriction Endonuclease Protection, Selection and Amplification (REPSA), massively parallel sequencing, and bioinformatic analyses. We identified a consensus TTHA0973 recognition sequence of 5'-AACnAACGTTnGTT-3' that exhibited nanomolar binding affinity. This sequence was mapped to several sites within the T. thermophilus HB8 genome, a subset of which corresponded to promoter regions regulating genes involved in phenylacetic acid degradation. These studies further demonstrate the utility of a biochemistry-centric approach for the facile identification of potential biological functions for orphan transcription factors in a variety of organisms.