In order to measure the content of beta- and gamma-actin mRNA in mouse oocytes and ovulated eggs, Northern and slot blots were hybridized to complementary RNA probes transcribed from mouse isotype-specific cDNA sequences. The blots included samples of isotype-specific sense strand RNA standards prepared from the same cDNA sequences. Total actin mRNA content was estimated to be 40 fg per preovulatory full-grown oocyte or egg, consisting of one-third beta-actin mRNA and two-thirds gamma-actin mRNA. Ninety per cent of the actin mRNA is on polysomes in full-grown oocytes. The per cent of actin mRNA in polysomal mRNA is similar to the per cent of actin in newly synthesized proteins. Measurements on other developmental stages showed that, in mid-growth-phase oocytes, each actin mRNA reaches a level twofold higher than in full-grown oocytes. Thereafter, all modulations of the two isotypic mRNAs occur in parallel; that is, they are maintained at constant levels during the late growth phase (oocytes from females 8–14 days old); gradually degraded in oocytes that have completed their rapid growth phase (oocytes from females 15–18 days old), in maturing oocytes, and in 1- and 2-cell embryos; and deadenylated after about 7 h of progression into meiotic maturation.
(1) Background: Little is known regarding the best ways to promote academic throughput within the ranks of attending ophthalmology physicians. The purpose of this project is to evaluate the effect of a monetized points system on incentivizing research output and other academic activity in academic ophthalmology attendings. (2) Methods: This is a retrospective study of 15 academic ophthalmology attendings at a single academic teaching hospital from 1 July 2015 to 30 June 2020. A points system was implemented in the 2017 academic year (1 July 2016–30 June 2017), in which ophthalmology attendings accrued points for eight categories of academic achievement. We compared the overall number of publications, number of first/senior author publications, and corresponding impact factors of journals via the PubMed database in the two years of data before and after the points system was implemented. We analyzed points awarded for eight categories of academic achievement in the first, second, and third year of the program. (3) Results: There was no significant change in research productivity for attending ophthalmologists after institution of the points system. From 2017 to 2019, Mann–Whitney analysis revealed a significant increase in points awarded for mentorship per physician (p = 0.013). (4) Conclusions: Our data suggest that within the framework of the points system, attendings—rather than prioritizing publications—gravitated towards mentorship activities to accrue points.
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