Biocompatibility of the vital dye Acid Violet-17 on retinal pigment epithelial cells

Purpose: To examine the viability and differentiation of retinal pigment epithelial (RPE) cells after exposure to the vital dye Acid Violet-17 (AV-17). Methods: Bovine RPE cells were incubated with AV-17 (0.0625-0.5 mg/mL) for 30 seconds or 5 minutes. Viability was determined by live/dead staining, cleaved CASP3 immunostainings, and MTT test. Actin cytoskeleton was visualized by Alexa 488-phalloidin. Immunocytochemistry was performed to determine the levels of ZO-1, CTNNB1, and KRT19. Results: Exposure to AV-17 at the concentrations of 0.25-0.5 mg/mL resulted in a dose-dependent decrease in viability, the loss of ZO-1 from tight junctions, translocation of CTNNB1 into the cytoplasm and nucleus, disarrangement of the actin cytoskeleton, and a slight increase in KRT19. Conclusion: AV-17 at a concentration. 0.125 mg/mL is likely to be well tolerated by the RPE cells, whereas the concentrations from 0.25 mg/mL onward can reduce viability and induce dedifferentiation particularly after long-term exposure

The Wooster Voice (Wooster, OH), 1946-10-04

The football team has sustained an abundance of injuries over the past week. Both staff and students are having difficulties with not have enough housing spaces, nor enough classrooms. The first year senate chair will be Don Shawver. Students have voted in favor for having a homecoming queen by 757 for and 128 against. On the thirteenth of October, the Inter-Club Council will be hosting a tea for any freshman girl who is interested in joining a section. A feature is written about how a Latin American student views the College of Wooster. Emory Anderson writes about how squirrels are slowly dominating the world.https://openworks.wooster.edu/voice1941-1950/1128/thumbnail.jp

Microbial communities on plastic particles in surface waters differ from subsurface waters of the North Pacific Subtropical Gyre

The long-term fate of plastics in the ocean and their interactions with marine microorganisms remain poorly understood. In particular, the role of sinking plastic particles as a transport vector for surface microbes towards the deep sea has not been investigated. Here, we present the first data on the composition of microbial communities on floating and suspended plastic particles recovered from the surface to the bathypelagic water column (0-2000 m water depth) of the North Pacific Subtropical Gyre. Microbial community composition of suspended plastic particles differed from that of plastic particles afloat at the sea surface. However, in both compartments, a diversity of hydrocarbon-degrading bacteria was identified. These findings indicate that microbial community members initially present on floating plastics are quickly replaced by microorganisms acquired from deeper water layers, thus suggesting a limited efficiency of sinking plastic particles to vertically transport microorganisms in the North Pacific Subtropical Gyre.HN, AV were financed through the European Research Council (ERC-CoG Grant Nr 772923, project VORTEX). PDM was supported by NWO (VI.Veni.212.040)

Study of the dynamics of the accumulation of chemical elements by moss-transplants

Artificial retinal detachment is increasingly used in submacular surgery. However, overcoming physiological retinal adhesiveness by subretinal fluid injection is suspected to cause cellular damage and thus to limit visual rehabilitation. This experimental study was designed to examine the ultrastructural changes induced by retinal detachment under vitrectomy conditions and to evaluate factors that reduce adhesiveness and minimize cellular damage

All-oral low-dose chemotherapy TEPIP is effective and well-tolerated in patients with peripheral T-cell lymphoma

Purpose: Peripheral T-cell lymphoma (PTCL) is a rare and heterogenous hematologic malignancy with poor prognosis especially in elderly and frail patients who are not eligible for intensive treatment. The resulting palliative setting necessitates tolerable but effective schedules for outpatient treatment. TEPIP is a locally developed, all-oral low-dose regimen comprising trofosfamide, etoposide, procarbazine, idarubicin, and prednisolone. Methods: In this observational retrospective, single-center study, the safety and efficacy of TEPIP was evaluated in 12 patients (pts.) with PTCL treated at the University Medical Center Regensburg between 2010 and 2022. The endpoints were overall response rate (ORR) and overall survival (OS), and adverse events were individually reported according to the Common Terminology Criteria for Adverse Events (CTCAE) criteria. Results: The enrolled cohort was characterized by advanced age (median 70 years), extensive disease (100% Ann Arbor ≥stage 3), and poor prognosis (75% high/high-intermediate international prognostic index). The most common subtype was angioimmunoblastic T-cell lymphoma (8/12), and 11/12 patients had relapsed or refractory disease at TEPIP onset with a median of 1.5 prior treatment regimens. After a median of 2.5 TEPIP cycles (total of 83 cycles), the ORR was 42% (complete remission 25%), and the OS reached a median of 185 days. Any grade of adverse event (AE) occurred in 8/12 patients, with four patients showing AE ≥CTCAE grade 3 (33%), and the AEs were mainly non-hematological. Conclusion: TEPIP demonstrated competitive efficacy with a tolerable safety profile in a highly palliative cohort of patients with difficult-to-treat PTCL. The all-oral application, which makes outpatient treatment possible, is particularly noteworthy

Coronavirus disease 2019 induces multi‐lineage, morphologic changes in peripheral blood cells

The clinical course of coronavirus disease 2019 (COVID‐19) varies from mild symptoms to acute respiratory distress syndrome, hyperinflammation, and coagulation disorder. The hematopoietic system plays a critical role in the observed hyperinflammation, particularly in severely ill patients. We conducted a prospective diagnostic study performing a blood differential analyzing morphologic changes in peripheral blood of COVID‐19 patients. COVID‐19 associated morphologic changes were defined in a training cohort and subsequently validated in a second cohort (n = 45). Morphologic aberrations were further analyzed by electron microscopy (EM) and flow cytometry of lymphocytes was performed. We included 45 COVID‐19 patients in our study (median age 58 years; 82% on intensive care unit). The blood differential showed a specific pattern of pronounced multi‐lineage aberrations in lymphocytes (80%) and monocytes (91%) of patients. Overall, 84%, 98%, and 98% exhibited aberrations in granulopoiesis, erythropoiesis, and thrombopoiesis, respectively. Electron microscopy revealed the ultrastructural equivalents of the observed changes and confirmed the multi‐lineage aberrations already seen by light microscopy. The morphologic pattern caused by COVID‐19 is characteristic and underlines the serious perturbation of the hematopoietic system. We defined a hematologic COVID‐19 pattern to facilitate further independent diagnostic analysis and to investigate the impact on the hematologic system during the clinical course of COVID‐19 patients

STRN-ALK Fusion in a Case of Malignant Peritoneal Mesothelioma: Mixed Response to Crizotinib, Mode of Resistance, and Brigatinib Sequential Therapy

ALK fusions were first described by Morris et al1 in 1994. Several studies have reported genetic alterations of the ALK gene in various tumor types since then, consisting of mutations, amplifications, and fusions.1-3 Fusion proteins have an active C-terminal tyrosine kinase domain in common.3 Here, we describe an STRN-ALK fusion in malignant peritoneal mesothelioma (MPM), which has previously been documented in other neoplasms, including thyroid cancer, renal carcinoma, leukemia, lymphoma, colon adenocarcinoma, head and neck adenocarcinoma, pericardial and peritoneal mesothelioma, and cutaneous squamous cell carcinoma.4-6 MPM is a rare disease with an incidence of approximately seven per million people per year.7 Patients' life expectancy is low (on average 12 months) because of the late clinical presentation with abdominal or pelvic pain or lymphadenopathy.8,9 Recently, ALK rearrangements have gained attention, especially in young female patients with MPM. Hung et al10 identified three ALK fusions in 88 consecutively screened patients with MPM. Fusion partners were ATG16L1, TPM1, and STRN. In another study by Mian et al,11 among 32 patients ≤ 40 years old with mesothelioma (of which 25 were MPM), an ALK rearrangement was detected by fluorescence in situ hybridization in two patients (6%). One of the cases harbored an STRN-ALK fusion as described in the current case. Argani et al12 described additional five cases of ALK fusions in pediatric MPM. Subsequently, three more cases of STRN-ALK rearrangements in MPM have been published individually.6,13,14 In non–small-cell lung cancer (NSCLC), the discovery of specific drugs targeting ALK rearrangements led to significant therapeutic advances. Currently, various ALK inhibitors, namely, ceritinib, crizotinib, and alectinib, are used as first-line treatment in adult ALK-positive advanced NSCLC. Although crizotinib as a first-generation ALK inhibitor has already proven superiority over chemotherapy,15 next-generation ALK inhibitors such as ceritinib yielded even better survival rates.16 Moreover, both brigatinib and alectinib demonstrated superior effectiveness when directly compared with crizotinib.17,18 Unfortunately, resistance is frequently observed following an initial response in all these agents.19 Mechanisms of resistance, which often include ALK mutations, are in general universal although variable mutational frequencies are observed depending on the inhibitor.20 Despite this large base of knowledge for lung cancer, the evaluation of ALK fusions in other entities remains challenging because of limited available data

Identification of Disparities in Personalized Cancer Care—A Joint Approach of the German WERA Consortium

(1) Background: molecular tumor boards (MTBs) are crucial instruments for discussing and allocating targeted therapies to suitable cancer patients based on genetic findings. Currently, limited evidence is available regarding the regional impact and the outreach component of MTBs; (2) Methods: we analyzed MTB patient data from four neighboring Bavarian tertiary care oncology centers in Würzburg, Erlangen, Regensburg, and Augsburg, together constituting the WERA Alliance. Absolute patient numbers and regional distribution across the WERA-wide catchment area were weighted with local population densities; (3) Results: the highest MTB patient numbers were found close to the four cancer centers. However, peaks in absolute patient numbers were also detected in more distant and rural areas. Moreover, weighting absolute numbers with local population density allowed for identifying so-called white spots—regions within our catchment that were relatively underrepresented in WERA MTBs; (4) Conclusions: investigating patient data from four neighboring cancer centers, we comprehensively assessed the regional impact of our MTBs. The results confirmed the success of existing collaborative structures with our regional partners. Additionally, our results help identifying potential white spots in providing precision oncology and help establishing a joint WERA-wide outreach strategy