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DNA methylation is an epigenetic modification required for transposable element (TE) silencing, genome stability, and genomic imprinting. Although DNA methylation has been intensively studied, the dynamic nature of methylation among different species has just begun to be understood. Here we summarize the recent progress in research on the wide variation of DNA methylation in different plants, organs, tissues, and cells; dynamic changes of methylation are also reported during plant growth and development as well as changes in response to environmental stresses. Overall DNA methylation is quite diverse among species, and it occurs in CG, CHG, and CHH (H = A, C, or T) contexts of genes and TEs in angiosperms. Moderately expressed genes are most likely methylated in gene bodies. Methylation levels decrease significantly just upstream of the transcription start site and around transcription termination sites; its levels in the promoter are inversely correlated with the expression of some genes in plants. Methylation can be altered by different environmental stimuli such as pathogens and abiotic stresses. It is likely that methylation existed in the common eukaryotic ancestor before fungi, plants and animals diverged during evolution. In summary, DNA methylation patterns in angiosperms are complex, dynamic, and an integral part of genome diversity after millions of years of evolution.

Especially in the last decade or so, there have been dramatic advances in fluorescence-based imaging methods designed to measure a multitude of functions in living cells. Despite this, many of the methods used to analyze the resulting images are limited. Perhaps the most common mode of analysis is the choice of regions of interest (ROIs), followed by quantification of the signal contained therein in comparison with another \"control\" ROI. While this method has several advantages, such as flexibility and capitalization on the power of human visual recognition capabilities, it has the drawbacks of potential subjectivity and lack of precisely defined criteria for ROI selection. This can lead to analyses which are less precise or accurate than the data might allow for, and generally a regrettable loss of information. Herein, we explore the possibility of abandoning the use of conventional ROIs, and instead propose treating individual pixels as ROIs, such that all information can be extracted systematically with the various statistical cutoffs we discuss. As a test case for this approach, we monitored intracellular pH in cells transfected with the chloride/bicarbonate transporter slc26a3 using the ratiometric dye SNARF-5F under various conditions. We performed a parallel analysis using two different levels of stringency in conventional ROI analysis as well as the pixels-as-ROIs (PAR) approach, and found that pH differences between control and transfected cells were accentuated by ~50-100% by using the PAR approach. We therefore consider this approach worthy of adoption, especially in cases in which higher accuracy and precision are required.

Category: Other; Ankle; Midfoot/Forefoot Introduction/Purpose: Closure of high-tension surgical wounds is a challenge frequently encountered during surgical procedures. The use of a novel adhesive augmentation device, HEMIGARD, has been proposed to decrease tension on wound closure and thereby increase the amount of force needed for suture pullout. In principle, this may help prevent wound dehiscence, skin edge necrosis and the sequelae thereof. We hypothesized that HEMIGARD augmentation of suture placement would require more force for suture pullout from human cadaveric lower extremity skin when compared to suture alone. Methods: In this study, HEMIGARD with suture was compared to suture alone on leg and foot measurements from four cadavers. One side of the incision was used to test the HEMIGARD according to the manufacturer's instructions. The other side of the same incision was used to test the same suture material, passed without HEMIGARD, to allow for direct comparison. A force gauge was used to measure the Newtons of force required for suture pullout. A total of 30 measurements were recorded per cadaver; 15 using HEMIGARD and 15 using suture alone. Results: No difference was observed between HEMIGARD and suture alone in the amount of force required for suture pullout. When excluding instances of HEMIGARD adhesive failure, which occurred in 67% of measurements, the HEMIGARD was found to be superior to suture alone in the cadaveric foot, but not in the leg. Conclusion: The amount of force required for suture pullout from human cadaveric lower extremity skin did not significantly differ when using HEMIGARD augmentation of suture placement versus using suture alone. However, when excluding instances of HEMIGARD adhesive failure, the HEMIGARD may be superior to suture alone in the cadaveric foot, but not in the cadaveric leg.

A patient with a benign bizarre parosteal osteochondromatous proliferation (BPOP) located in the anterior knee was treated with resection in preparation for total knee arthroplasty (TKA). The BPOP reoccurred and was treated with re-resection at the time of TKA. The BPOP reoccurred a second time and underwent malignant transformation to a fungating high-grade pleomorphic sarcoma with metastatic lesions. This case highlights the rare potential of a previously benign BPOP to undergo malignant transformation after recurrence. A wide margin resection may be considered primarily when surgery is indicated to prevent recurrence and its potential sequelae. [Orthopedics. 2024;47(6):e322–e326.]

The purpose of this study was to determine how equity changed following Texas House Bill 1 (2011) and whether the change in equity correlated with a change in standardized test scores. The major research question was to determine whether school funding correlates to changes with student outcomes in reading and math. Using the equity framework of school finance, this study looked at how horizontal equity and fiscal neutrality changed during an 8-year period from 2009 to 2016. The equity measures were then compared to reading and math scores on a nationally administrated standardized test for students in fourth grade. The study found that although equity and funding decreased immediately after changes in state law in 2011, per-pupil spending increased surpassing 2009 amounts and equity increased. Most of these increases came from an increased share of local funding through property taxes, which increased as property value across Texas also increased, despite decreased federal and state funding. Recommendations include continuing to research ways to measure changes of equity and compare those changes to student outcomes to better evaluate school finance systems. This study did not reveal a connection between equity and outcomes but provided greater understanding on how equity did change in Texas, which can help led to better policy decisions when developing state funding systems for public education in the future.

Although members of the slc26 transporter protein family participate in diverse physiological processes of great importance, to date little is known about their regulation. In this dissertation, a series of experiments is presented which shows with progressive conclusiveness that the ubiquitous, calcium-responsive protein calmodulin binds to a disordered cytosolic region in many of the slc26 proteins, thereby inhibiting function. First, sequences of all constituents of the slc26 family were analyzed bioinformatically, revealing a high likelihood that they share an intrinsically-disordered region (IDR) in their intracellular c-terminal \"sulfate transporter and anti-sigma factor\" (STAS) domains, a finding subsequently supported empirically. Since IDRs sometimes bind calmodulin, and since the functions of slc26 proteins had been implicated as being responsive to intracellular calcium, a bioinformatical method for predicting calmodulin binding was used to show high calmodulin binding propensities across the slc26 family. Three members of the slc26 family (a3, a5, and a6) were then shown empirically to bind calmodulin in their STAS domains. Fluorescence polarization assays involving calmodulin and a peptide from slc26a5 (prestin) were then used to quantify the affinity of the interaction, which was ∼87 nM in the presence of calcium and ∼1000-fold weaker in its absence. In embarking on functional studies, a novel pixel-based analysis technique was developed, allowing for better measurements in image-based functional assays. Using this method, the effects of calmodulin on one transporter, slc26a3, were examined, and it was found that inhibitory effects of calcium were blocked by the calmodulin inhibitor trifluoperazine, suggesting that calmodulin mediates calcium-induced inhibition. To explore the molecular details of the interaction, two crystal structures of STAS domains were determined. One of these structures revealed a tetrameric form with a central pore, suggestive of a transport pathway, while the other contained a substrate moiety in the region mapping onto the pore region in the tetrameric structure, validating the transport pathway. Finally, molecular modeling suggested a mechanism whereby calmodulin's binding to a loop extending from the pore-lining helices (shown herein to be the calmodulin binding site), would perturb the dynamics of this same pore structure, thereby gating the transport seen in functional assays.

Glucose is arguably the most important molecule in metabolism, and its mismanagement underlies diseases of vast societal import, most notably diabetes. Although glucose-related metabolism has been the subject of intense study for over a century, tools to track glucose in living organisms with high spatio-temporal resolution are lacking. We describe the engineering of a family of genetically encoded glucose sensors with high signal-to-noise ratio, fast kinetics and affinities varying over four orders of magnitude (1 μM to 10 mM). The sensors allow rigorous mechanistic characterization of glucose transporters expressed in cultured cells with high spatial and temporal resolution. Imaging of neuron/glia co-cultures revealed ~3-fold higher glucose changes in astrocytes versus neurons. In larval Drosophila central nervous system explants, imaging of intracellular neuronal glucose suggested a novel rostro-caudal transport pathway in the ventral nerve cord neuropil, with paradoxically slower uptake into the peripheral cell bodies and brain lobes. In living zebrafish, expected glucose-related physiological sequelae of insulin and epinephrine treatments were directly visualized in real time. Additionally, spontaneous muscle twitches induced glucose uptake in muscle, and sensory- and pharmacological perturbations gave rise to large but enigmatic changes in the brain. These sensors will enable myriad experiments, most notably rapid, high-resolution imaging of glucose influx, efflux, and metabolism in behaving animals.

\"This is what I've been waiting for,\" [David Yassky] told supporters. \"We started a distant third in the polls. We cleared a lot of ground. And we're going to clear all the ground on Sept. 29.\" \"After eight years of the mayor who has looked out for the rich and powerful, isn't it time we had a mayor who looked out for the rest of us?\" he asked. \"It's time for a change, New York! Eight years is enough!\" \"This says two things: Barack Obama isn't running for President, and there's no way to vote for Michael Bloomberg,\" he said. \"The real mayoral contest is in November.\"

\"We need new solutions and new people to offer those solutions. The same old approaches won't work,\" de [Bill de Blasio] said. \"The people want change, and we're going to give it to them in two weeks.\" \"I'll explain why my experience and vision as a effective advocate for New York families matches up well against his record as a political consultant and an insider,\" [Mark Green] said. \"He's going to have to answer questions about his history and his vision.\" \"This is what I've been waiting for,\" Yassky told supporters. \"We started a distant third in the polls. We cleared a lot of ground. And we're going to clear all the ground on Sept. 29.\"

\"This says two things: Barack Obama isn't running for President and there's no way to vote for Michael Bloomberg,\" he said. \"The real mayoral contest is in November.\" \"I can't wait for a head-to-head runoff to contrast two very different records and approaches,\" [Mark Green] said. \"Voters will be able to decide whose record and experience they most trust.\" \"I got tons of it. I've never seen it so bad,\" she said. \"I got a lot of calls, too. I stopped answering my phone after a while. It was awful!\"