乳がんの生物学的および分子的異質性は,がん幹細胞の含有量と相関しています
Salvatore Pece1, Daniela Tosoni, Stefano Confalonieri
1IFOM, Fondazione Istituto FIRC di Oncologia Molecolare, Via Adamello 16, 20139 Milan, Italy. salvatore.pece@ifom-ieo-campus.it
Cell
|January 16, 2010
まとめ
研究者らは,PKH26染料を用いて正常な乳腺幹細胞 (hNMSCs) を分離した. hNMSCシグネチャーは,腫瘍内の癌幹細胞 (CSCs) を特定し,CSC含有量が乳がんの異質性を誘発することを明らかにしました.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- がん研究 がん研究
- 乳がんの生物学について
背景:
- 幹細胞 (SC) 経路は,がんでは頻繁に変化します.
- 特定の幹細胞の集団を特定し,隔離することは,がんの発症を理解するために極めて重要です.
- 乳腺幹細胞 (hNMSCs) は,乳腺の正常な発達に重要な役割を果たし,乳がんに関与しています.
研究 の 目的:
- ヒト正常乳腺幹細胞 (hNMSCs) を分離し,特徴づけること.
- hNMSCsの転写プロファイルが乳がんの特徴を予測できるかどうかを判断する.
- 乳がんの異質性におけるがん幹細胞 (CSC) の役割を調査する.
主な方法:
- PKH26染色体保持に基づいて培養された哺乳類からhNMSCsを分離.
- PKH26陽性細胞の転写プロファイリングにより,hNMSCシグネチャーを確立します.
- hNMSCシグネチャーマーカーを使用して,正常な組織と腫瘍組織からSCsの将来的な分離.
- CSCの濃度を評価するために,G1とG3の腫瘍を比較した異種移植実験.
主要な成果:
- PKH26陽性細胞は,hNMSCの特徴を示した.
- hNMSCシグネチャーは,乳がんの生物学的および分子学的特徴を正確に予測しました.
- 差異が薄い (G3) 乳がんでは,差異が大きい (G1) 乳がんと比較して,CSCの含有量が高かった.
- G3腫瘍は,異種移植によってCSCに富んでいることが確認されました.
結論:
- この研究では,hNMSCsを成功裏に隔離し,特徴づけました.
- hNMSCシグネチャーは,CSCを特定し,がんの特徴を予測するための貴重なツールとして機能します.
- CSC含有量は,ヒトの乳がんにおけるフェノタイプおよび分子異質性の重要な要因である.
関連する概念動画
Cancer Stem Cells and Tumor Maintenance
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer Stem Cells and Tumor Maintenance
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Distinctive Features of Adult Stem Cells vs Cancer Stem Cells
A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...
Adaptive Mechanisms in Cancer Cells
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...


