alexa The Role of Stroma in Tumour-Host Co-Existence: Some Perspectives in Stroma-Targeted Therapy of Cancer
ISSN: 2167-0501

Biochemistry & Pharmacology: Open Access
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Research Article

The Role of Stroma in Tumour-Host Co-Existence: Some Perspectives in Stroma-Targeted Therapy of Cancer

Joseph Molnár1*,Ilona Mucsi1, Helga Engi1, Gabriela Spengler1, Leonard Amaral1,2, Attila Zalatnai3, Qi Wang4 and Ben Efraim Shlomo5
1Institute of Medical Microbiology and Immunobiology, University of Szeged, Szeged, Hungary
2Travel Medicine, Center for Malaria and other Tropical Diseases (CMDT), Institute of Hygiene and Tropical Medicine of Lisbon, Universidade Nove de Lisboa, Lisbon,Portugal
3Department of Pathology, University of Semmelweis, Budapest, Hungary
4Department of Respiratory Medicine, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
5Department of Human Microbiology Sackler, Faculty of Medicine, Tel-Aviv –University, Tel Aviv, 62155, Israel
Corresponding Author : Joseph Molnar
Institute of Medical Microbiology
and Immunobiology
University of Szeged, Szeged, Hungary
E-mail: [email protected]
Received November 21, 2012; Accepted December 27, 2012; Published December 31, 2012
Citation: Molnár J, Mucsi I, Engi H, Spengler G, Amaral L, et al. (2013) The Role of Stroma in Tumour-Host Co-Existence: Some Perspectives in Stroma-Targeted Therapy of Cancer. Biochem Pharmacol 2:107. doi:10.4172/2167-0501.1000107
Copyright: © 2013 Molnár J, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Cancer grows at the expense of the host as a parasite or superparasite following the second law of thermodynamics (conservation of energy). When the cancer cell progresses via replication to the special state called “spheroid”, a new phase begins with its intimiate interaction and development of responses from the stroma which together assist in the formation of a full blown cancer. Among the processes involved are the development of blood vessels and lymphatic channels which are essential for maintenance and further growth of the cancer mass. In this way the condition of “parasitism” is completed with simultaneous suppression of the immune response of the host to the histoincompatability of the tumor mass. Stroma/parenchyma promotes cancer invasion by feeding cancer cells and inducing immune tolerance. The dynamic changes in composition of stroma and biological consequences as feeder of cancer cells and immune tolerance can give a perspective for rational drug design in anti-stromal therapy. There are differences between normal and cancer cells at subcellular level such as compartmentalzation and structure of cytoskeleton and energy distribution (that is low generally, but locally high in normal cells). In cancer cannibalism of normal cells, the growing
cancer mass is a factor for progression and invasion. Cancer cells have been shown to kill normal cells and the products of cell death used for progression of growth of the cancer cell. Serum and growth factors produced by tumor stroma also provide the needed nutrients and conditions for further tumor growth. Cancer cannot feed off other cancer cells and therefore grow poorly. Probably, although not
yet proven, the inability of cancer to “parasitise” other cancer cell types is probably due to some kind of competition or interference. The tumor is in charge of its own development due to its induction proteinases, lipid mobilization factors and angiogenetic factors as well as its ability to negate immune responses of the host response to what is in essence a foreign body. In our review co-existence of normal and cancer cells in tumor with the growth promoting factors, and the immune tolerance mediating factors produced in the stromal and cancer cells/tissues will be discussed with perspective of
stroma targeted therapy.

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