The mechanism of prostate cancer (PCa) progression and metastasis remains unclear. Spontaneous cancer cell fusion is one theory of etiology. This essay takes a reductionist approach to highlight spontaneous cancer cell fusion as the primary mechanism of PCa progression and metastasis. PCa cells can fuse with adjacent cancer cells or various bystander cells in the tumor microenvironment. The fate of the fusion hybrids is determined by the similarity of cell cycle timing between the fusing cancer cell and the cell being fused. A tumor cell with high proliferative activity, when fused with a non-proliferating neighbor, results in growth arrest. However, fusion with a proliferative cell may lead to abnormal hybrid cell division, causing the hybrid genome to undergo random recombination. This creates a hybrid derivative clone with a genotype and phenotype distinct from those of both the parental cancer cell and the cell being fused. The progression of tumor cell heterogeneity is dynamic, as the hybrid derivative clone can inherit the ability to fuse. Their fusion with various proliferative cells in the tumor microenvironment generates additional hybrid clones, each with a new genomic makeup and altered phenotype. The spontaneity of PCa cell fusogenicity enables an ever-changing tumor cell heterogeneity, which is the root cause of the pathological behavior of PCa progression and metastasis.
A common issue in defining marine protected areas is the often-vague boundaries, despite widespread GPS use. Identifying conservation zones varies but generally involves assessing species diversity, with choices based on ecological or economic value—usually at the manager’s discretion. This study suggests prioritizing areas with maximum diversity, focusing on six reef groups: hard and soft corals, macroalgae, sponges, hydrozoans, and anemones. Data from photo-transects and species collections at 18 sites in Cozumel’s marine park were analysed using geostatistical Kriging to delineate zones. The results highlight the southern part of the island as the most diverse and in need of protection.
Copper (Cu) is a uniquely versatile catalyst whose performance in reactions, such as the electrochemical CO2 reduction reaction (CO2RR) is intimately linked to the dynamic evolution of its surface under operating conditions. Rather than remaining structurally static, Cu undergoes continuous surface restructuring, forming new morphologies, facets, and defect structures that differ significantly from the as-prepared material. These transformations strongly influence catalytic activity and selectivity, yet the mechanisms governing them remain poorly understood. As a result, Cu surface restructuring has emerged as a “black box” phenomenon in electrocatalysis, marked by contradictory interpretations and a lack of predictive control. In this review, we examine six major factors proposed to drive Cu surface restructuring: (i) adsorbed hydroxyl species, (ii) applied potential, (iii) adsorbed CO intermediates, (iv) surface oxidation, (v) electrolyte composition, and (vi) current density. We discuss how each factor can modify surface energetics, atomic mobility, and local reaction environments, while emphasizing that these influences rarely act independently.
While rare, it is widely accepted that autonomous vehicles (AVs) will find themselves in dilemma scenarios involving vulnerable road users (VRUs). The ethics of these dilemma situations have been debated extensively in the context of trolley-problem-like scenarios. What has not been noted is the inherent unfairness implicit in many of these discussions, in which VRUs are seen as passive bystanders with no say in what befalls them. Rather than simply remaining still in a collision scenario, VRUs can (and often do) take action that needs to be accounted for. If we are to increase fairness on public roads, it is important that AVs communicate with VRUs. This paper presents a highly theoretical discussion on the possibility of using communication tools (such as the V2X system) and techniques (derived from the science of human-machine interaction) to support protective, risk-reducing responses from VRUs during inevitable AV collisions. The paper begins with a brief ethical exploration of fairness in the context of current debates surrounding AV collisions. We proceed to discuss possible technical solutions to AV-VRU communication, as well as the types of audio, visual, and tactile communication strategies necessary in critical scenarios.
