Nowack et al. [53] concluded that the risk due to ENMs cannot be determined exclusively for pristine ENMs, but has to consider alterations and transformation in the environment.
Integration of ENM alteration and transformation in the risk assessment.
The bentonite barrier is supposed to undergo alteration and transformation processes due to reaction with groundwater and heating originated from radionuclide decay.
It generally forms in the alteration and transformation of feldspar grains in acidic fluid environment, indicating the development of acidic diagenetic environment in the process of diagenesis evolution (Worden and Burley 2003; Hammer et al. 2010).
The function of ICs in the bladder is currently an area of much research interest, because recent evidence has shown altered IC function, including alterations in signalling properties and transformations in structure to a more fibroblast-like phenotype in bladder diseases including urgency and painful bladder syndrome (McCloskey 2013).
Finally, our data showed that mass enlargement was never associated with the development of the endocrine alterations and with malignant transformation of these lesions.
Sustained cell proliferation in a micro-environment rich in inflammatory cells, cytokines/chemokines, growth factors and DNA-damaging agents (such as reactive oxygen and nitrogen species because of long-term inflammation) will lead to permanent genetic alterations and subsequent neoplastic transformation of the proliferating cells (Komori et al, 2008).
As genome instability triggered by endogenous or exogenous DNA damaging agents is one of the main causes of cancer, loss or deficiency of Cav-1 at early stages of cancer development may cause a defect in DNA damage response leading to genomic alteration and oncogenic transformation.
However, in spite of the close relationship between chromosomal alterations and neoplastic processes, spontaneous transformation has not been convincingly demonstrated in long-term cultures of human primary cells.
As with all types of cancer, PCa is the result of genetic and epigenetic alterations that induce transformations of normal glandular epithelia [ 4].
