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Purpose The optimal management of primary renal leiomyosarcomas is unknown owing to its rarity and minimal available information about their primary, adjuvant treatment and clinical outcomes. This study systematically reviews treatment evidence and effects in terms of survival for leiomyosarcomas arising primarily from kidney, renal pelvis and renal vessels. Method PubMed and Embase databases were searched from inception to March 2023, with manual searches of reference lists. Two investigators independently reviewed the studies reporting management and survival outcomes of renal leiomyosarcomas. Results A total of 85 publications met inclusion criteria, reporting on 188 cases. The median age was 55.5 years, predominantly female [52.7%]. Pain was the most common presenting symptom [41.5%], and most tumors were high grade [45.8%]. Complete surgical resection with negative margins forms definitive treatment. The median disease-free survival and overall survival (OS) for all reviewed patients were 24 months [95%CI 4.1–43.9] and 42 months [95%CI 32.5–51.4], respectively. The OS of 1 year, 2 year, 3 year and 5 year was 78.8%, 64.4%, 53.8% and 38.9%, respectively. On univariate analysis, favorable factors for OS included tumor size ≤ 5 cm, low-grade histology, tumors of renal vascular origin and non-metastatic disease at presentation. Neoadjuvant or adjuvant treatment with either radiotherapy or chemotherapy has been shown to improve OS (NR vs. 36 months, p  < 0.001), especially for high-grade tumors > 5 cm in size. Conclusion Radical nephrectomy with en bloc tumor resection with negative margins forms the mainstay of treatment for renal leiomyosarcomas. Adjuvant radiotherapy or chemotherapy appears to improve OS. To validate this treatment strategy, prospective multicentric efforts are required to acquire reliable data from randomized trials.

[...]it is imperative that hospital staff should obviate the risk of getting infected or becoming an asymptomatic source of infection from any possible visiting positive patient. [...]it is the responsibility of all health-care workers to take adequate precautions for their own safety and safety of others against getting SARS-CoV-2 infection from any visitor to the hospital, may it be the patient or his accompanying attendant. [...]it is imperative to test for SARS-CoV-2 virus in all patients who are planned for cancer surgery so that extra precautionary measures are taken in positive patients well in advance. [...]scarcity of PPE in developing countries like ours who have limited resources, poses a higher risk to health-care professionals, and therefore, it is very difficult to protect everyone in the OT complex with adequate PPEs. [...]in this time of scarcity, PPEs should be provided at least to all those health-care personnel who, in particular, come in direct contact with the virus-infected cancer patients during an invasive procedure and thus become highly vulnerable to coronavirus infection. [...]the patients on intravenous chemotherapy could instead be given oral chemotherapy drugs/hormone treatment, wherever possible, so that they have to visit the hospital to the minimum and stay at home during this time of pandemic.

Context Gallium, renowned for its notably low melting point and unique property of becoming liquid at room temperature, is a valuable constituent in phase change materials. In this study, we investigate the solid–liquid phase transition of gallium using the modified embedded atom method (MEAM) potential. It addresses the technique to compute the free energy difference between the solid and liquid without using a reference state. We examine various thermodynamic and dynamic properties, including density, specific heat capacity, diffusivity, and radial distribution functions. We compute the coexistence temperature of the solid–liquid phase transitions of gallium from free energy analysis. This information is crucial for understanding the behavior of the material under different pressure conditions and can be valuable for various applications, such as materials processing and high-pressure studies. The analysis, findings, and insights of the present work will be of great significance to the broad scientific and engineering communities in the field of phase transformation of materials. Methods A series of molecular dynamics(MD) simulations were conducted using the LAMMPS software packages. The gallium atoms are modeled using the modified embedded atom method (MEAM) potential. To accurately predict the solid–liquid phase transitions of gallium, we calculated free energy by employing the “constrained λ integration” method, coupled with multiple histogram reweighting (MHR). The solid–liquid coexistence line is determined through the Gibbs–Duhem integration technique.

Clinically localized prostate cancer is often treated with radical prostatectomy combined with pelvic lymph node dissection. Data suggest that lymph node dissection does improve disease staging, but its therapeutic value has often been debated, with few studies showing that lymph node removal directly improves oncological outcomes; however, lymph nodes are an important first site of antigen recognition and immune system activation and the success of many currently used immunological therapies hinges on this dogma. Evidence, particularly in the preclinical setting, has demonstrated that the success of immune checkpoint inhibitors is dampened by the removal of tumour-draining lymph nodes. Thus, whether lymph nodes are truly ‘foes’ or whether they are actually ‘friends’ in oncological care is an important idea to discuss.Pelvic lymph node dissection is performed for staging and to prevent recurrence of prostate cancer; however, immune checkpoint inhibition could be affected by lymph node removal. Here, the authors discuss the possibility that lymph nodes could be ‘friends’ rather than ‘foes’ in prostate cancer treatment.

Background There is relatively scarce data on the computed tomography (CT) detection of gastrointestinal (GI) involvement in gallbladder cancer (GBC). We aim to assess the GI involvement in GBC on CT and propose a CT-based classification. Methods This retrospective study comprized consecutive patients with GBC who underwent contrast-enhanced computed tomography (CECT) for staging between January 2019 and April 2022. Two radiologists evaluated the CT images independently for the morphological type of GBC and the presence of GI involvement. GI involvement was classified into probable involvement, definite involvement and GI fistulization. The incidence of GI involvement and the association of GI involvement with the morphological type of GBC was evaluated. In addition, the inter-observer agreement for GI involvement was assessed. Results Over the study period, 260 patients with GBC were evaluated. Forty-three (16.5%) patients had GI involvement. Probable GI involvement, definite GI involvement and GI fistulization were seen in 18 (41.9%), 19 (44.2%) and six (13.9%) patients, respectively. Duodenum was the most common site of involvement (55.8%), followed by hepatic flexure (23.3%), antropyloric region (9.3%) and transverse colon (2.3%). There was no association between GI involvement and morphological type of GBC. There was substantial to near-perfect agreement between the two radiologists for the overall GI involvement (k = 0.790), definite GI involvement (k = 0.815) and GI fistulization (k = 0.943). There was moderate agreement (k = 0.567) for probable GI involvement. Conclusion GBC frequently involves the GI tract and CT can be used to categorize the GI involvement. However, the proposed CT classification needs validation.

BackgroundWe hypothesised that rolling over the patient before abdominal paracentesis might homogenize the otherwise settled tumour cells in the ascitic fluid and possibly improve the cytological yield of abdominal paracentesis.MethodsWe conducted a randomized cross-over study at a single centre from June 2020 to July 2021. We included consecutive patients with ascites, where peritoneal carcinomatosis was considered an underlying aetiology. Included patients were randomised either to undergo standard paracentesis (SPG) first or rollover paracentesis (ROG) first. In SPG patients were asked to lie supine for 10 minutes before abdominal paracentesis and in ROG patients with ascites were rolled over thrice in bed laterally up to 90 degrees on either side to complete 3 turns and the ascitic fluid sample was drawn within 1 minute. The outcome assessor (cytopathologist) was blinded to the method of paracentesis. The study flow is shown in Figure 1 (IDDF2022-ABS-0033 Figure 1). The primary outcome was to compare the tumour cell positivity between the two groups.ResultsSeventy-one patients were enrolled and 62 were included for the final analysis of the study. Of 62, 53 had malignant ascites. Baseline characteristics were similar except for higher age in the malignant ascites group. This study did not demonstrate any statistically significant increase in the tumour cell positivity or improvement in cellularity with the use of rollover paracentesis (IDDF2022-ABS-0031 Table 1).Abstract IDDF2022-ABS-0033 Table 1Primary and secondary outcomes in the two groups Outcomes Roll over group (n-62) Standard paracentesis group (n-62) P value Primary outcome Tumor cell positivity 32 (39 patients had PC) 31 (39 patients had PC) 1 Secondary outcome Cellularity of predominant cells Good*- 37 (60%) Poor#-25 (40%) Good*- 36 (58%) Poor#-26 (42%) 1 Type of tumor cells Adenocarcinoma – 30 (94%) Lymphoma- 1 (3%) Suspicious of malignancy – 1 (had histological evidence of malignancy) * Good- large (>100cells/HPF) or medium (30–100cells/HPF)# Poor – (<30 cells/HPF)Abstract IDDF2022-ABS-0033 Figure 1ConclusionsIn conclusion, this randomised cross over trial did not demonstrate any improvement in the tumour cell positivity or cellularity with the use of rollover paracentesis as compared to standard paracentesis.Clinical Trial registrationCTRI/2020/06/025887 and NCT04232384.

5-methylcytosine (mC) and its TET-oxidized derivatives exist in CpG dyads of mammalian DNA and regulate cell fate, but how their individual combinations in the two strands of a CpG act as distinct regulatory signals is poorly understood. Readers that selectively recognize such novel \"CpG duplex marks\" could be versatile tools for studying their biological functions, but their design represents an unprecedented selectivity challenge. By mutational studies, NMR relaxation, and MD simulations, we here show that the selectivity of the first designer reader for an oxidized CpG duplex mark hinges on precisely tempered conformational plasticity of the scaffold adopted during directed evolution. Our observations reveal the critical aspect of defined motional features in this novel reader for affinity and specificity in the DNA/protein interaction, providing unexpected prospects for further design progress in this novel area of DNA recognition. Competing Interest Statement TU Dortmund University has filed a patent 339 application for part of the engineered MBDs described herein 340 (PCT/EP2020/087979, pending).

In the pursuit of sustainable ‘green’ energy generation, [FeFe]-hydrogenases have attracted significant attention due to their ability to catalyze hydrogen production. However, the sensitivity of these enzymes to O2 is a major obstacle for their application as biocatalysts in energy conversion technologies. In the search for an O2-stable [FeFe]-hydrogenase, we identified the hydrogenase ToHydA from Thermosediminibacter oceani that belongs to the rarely characterized Group B (M2a) [FeFe]-hydrogenases. Our findings demonstrate that ToHydA exhibits remarkable O2-stability, even under prolonged O2 exposure. By characterizing site-directed mutagenesis variants, we found that the highly conserved proton-transporting cysteine protects H-cluster from O2-induced degradation by forming Hinact state. The additional cysteine residue in the TSCCCP motif of ToHydA, a feature unique to Group B (M2a) [FeFe]-hydrogenases, enhances the flexibility of that motif and facilitates the formation of the Hinact state. Moreover, ToHydA possesses unique features, including the formation of an unusual Hinact resting state that distinguishes the enzyme from other [FeFe]-hydrogenases. Our atomistic molecular dynamics simulations reveal a previously unrecognized cluster of hydrophobic residues centered around the proton-transporting cysteine-bearing loop. This structural feature appears to be a common molecular characteristic in hydrogenases that form the O2-protected Hinact state. By exploiting these molecular features of ToHydA, future research can aim to rationally design hydrogenases that combine high catalytic activity with enhanced O2 stability, to develop more efficient and durable catalysts.

DNA partitioning CTPases of the ParB family mediate the segregation of bacterial chromosomes and low-copy number plasmids. They act as DNA-sliding clamps that are loaded at parS motifs in the centromeric region of target DNA molecules and then spread laterally to form large nucleoprotein complexes that serve as docking points for the DNA segregation machinery. Here, we identify conformational changes that underlie the CTP- and parS-dependent closure of ParB clamps. Moreover, we solve crystal structures of ParB in the pre- and post-hydrolysis state and provide insights into the catalytic mechanism underlying nucleotide hydrolysis. The characterization of CTPase-deficient ParB variants reveals that CTP hydrolysis serves as a timing mechanism to control the sliding time of ParB. Hyperstable clamps are trapped on the DNA, leading to excessing spreading and severe chromosome segregation defects in vivo. These findings clarify the role of the ParB CTPase cycle in partition complex dynamics and function and thus complete our understanding of this prototypic CTP-dependent molecular switch.