Clear Cell Renal Cell Carcinoma 2024–2025

A special issue of Cancers (ISSN 2072-6694). This special issue belongs to the section "Cancer Pathophysiology".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 436

Special Issue Editors

Special Issue Information

Dear Colleagues,

Clear cell renal cell carcinoma is one of the most interesting areas of study in oncology right now. Despite recent advances, these tumors continue to present a health problem of major concern in Western societies, seriously affecting public health services. The characteristics of this tumor make it an exciting field for translational collaboration between clinicians and basic researchers.

Clear cell renal cell carcinoma is a paradigmatic example of inter- and intra-tumor heterogeneity from morphological, immunohistochemical, and molecular viewpoints. It is also a model of hypoxia-related carcinogenesis. The latest findings on the spatial and temporal evolutionary patterns detected in this tumor are opening up possibilities for more successful treatments. In addition, the identification of metastatic phenotypes will allow for the early detection of aggressive genotypes, guiding specific patient management.

This tumor presents an excellent model for investigating the complexity of tumor/tumor and tumor/environment relationships from an ecological perspective. Analyzing internal tumor self-organization through the specialization of cell clones and subclones as local invaders and metastasizes, on one hand, and the interactions of specific subsets of tumor cells with the local host microenvironment, on the other, will significantly enrich our knowledge of this neoplasm. Finally, alternative approaches such as game theory have provided, in recent years, promising mathematical models that can be used to unveil the diversity of possible behaviors of this polyedrical disease.

Clear cell renal cell carcinoma also encompasses a paradigmatic test bench for antiangiogenic and immune checkpoint blockage therapies. The refinement of these therapeutic tools administered alone or in combination is a hot issue in oncology, and several international trials are underway in this area.

This Special Issue intends to serve as a multidisciplinary platform where urologists, oncologists, pathologists, radiologists, and basic researchers interested in clear cell renal cell carcinoma may meet and collaborate.

Dr. José I. López
Dr. Claudia Manini
Guest Editors

Manuscript Submission Information

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Keywords

  • clear cell renal cell carcinoma
  • pathology
  • diagnosis
  • hypoxia
  • intratumor heterogeneity
  • immune checkpoint blockage antiangiogenic therapy

Published Papers (1 paper)

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Research

16 pages, 20524 KiB  
Article
Ex Vivo Vascular Imaging and Perfusion Studies of Normal Kidney and Tumor Vasculature
by Ragnar Hultborn, Lilian Weiss, Egil Tveit, Stefan Lange, Eva Jennische, Malin C. Erlandsson and Martin E. Johansson
Cancers 2024, 16(10), 1939; https://doi.org/10.3390/cancers16101939 - 20 May 2024
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Abstract
This work describes a comprehensive study of the vascular tree and perfusion characteristics of normal kidney and renal cell carcinoma. Methods: Nephrectomy specimens were perfused ex-vivo, and the regional blood flow was determined by infusion of radioactive microspheres. The vascular architecture was characterized [...] Read more.
This work describes a comprehensive study of the vascular tree and perfusion characteristics of normal kidney and renal cell carcinoma. Methods: Nephrectomy specimens were perfused ex-vivo, and the regional blood flow was determined by infusion of radioactive microspheres. The vascular architecture was characterized by micronized barium sulphate infusion. Kidneys were subsequently sagitally sectioned, and autoradiograms were obtained to show the perfusate flow in relation to adjacent contact X-ray angiograms. Vascular resistance in defined tissue compartments was quantified, and finally, the tumor vasculature was 3D reconstructed via the micro-CT technique. Results show that the vascular tree of the kidney could be distinctly defined, and autoradiograms disclosed a high cortical flow. The peripheral resistance unit of the whole perfused specimen was 0.78 ± 0.40 (n = 26), while that of the renal cortex was 0.17 ± 0.07 (n = 15 with 114 samples). Micro-CT images from both cortex and medulla defined the vascular architecture. Angiograms from the renal tumors demonstrated a significant vascular heterogeneity within and between different tumors. A dense and irregular capillary network characterized peripheral tumor areas, whereas central parts of the tumors were less vascularized. Despite the dense capillarity, low perfusion through vessels with a diameter below 15 µm was seen on the autoradiograms. We conclude that micronized barium sulphate infusion may be used to demonstrate the vascular architecture in a complex organ. The vascular resistance was low, with little variation in the cortex of the normal kidney. Tumor tissue showed a considerable vascular structural heterogeneity with low perfusion through the peripheral nutritive capillaries and very poor perfusion of the central tumor, indicating intratumoral pressure exceeding the perfusion pressure. The merits and shortcomings of the various techniques used are discussed. Full article
(This article belongs to the Special Issue Clear Cell Renal Cell Carcinoma 2024–2025)
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