Lecture

Stem Cell Niches: Regulation and Anatomy

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In course

BIO-447: Stem cells and organoids

This course introduces the fundamentals of stem cell biology, with a particular focus on the role of stem cells during development, tissue homeostasis/regeneration and disease, and the generation of organoids from stem cells ...

Description

This lecture delves into the intricate world of stem cell niches, focusing on how adult stem cells are regulated by their microenvironment. The anatomy, key components, and the role of niches in controlling stem cell fates are explored through examples like the fruit fly testis niche and the haematopoietic stem cell niche. The lecture also discusses the tight regulation of stem cell numbers, the identification of niches, and the therapeutic potential of targeting niches. Various concepts such as quiescence, asymmetric self-renewal division, and the dynamics of cell fates in niches are elucidated, shedding light on the complexity of stem cell regulation.

Instructors (4)

Wouter Richard Karthaus

Teaching & PhD PhD Students Jillian Rose Love, Estelle Deby, Ester Simkova, Turan Badalli Courses Cellular and molecular biology II BIO-207 This course is aimed to familiarize students with the 3D organization of a eukaryotic cell, its compartmentalization, how cellular compartments communicate together and how a cell communicates with its environment. The related molecular mechanisms will be discussed. Practical - Karthaus Lab BIO-616 Students will learn 1) how organoids c

Matthias Lütolf

Matthias Lutolf is Full Professor at EPFL’s Institute of Bioengineering, with a cross appointment in the Institute of Chemical Sciences and Engineering. Lutolf was trained as a Materials Engineer at ETH Zurich where he also carried out his PhD studies (with Jeffrey Hubbell) that were awarded with an ETH medal. He continued his research training as a Post-Doctoral Fellow in Stem Cell Biology (with Helen Blau) at Stanford University. He has served as the Director of the Institute of Bioengineering from 2014 to 2018. Lutolf is an internationally recognized leader in the fields of stem cell bioengineering and tissue engineering. His research program uniquely combines stem cell biology with engineering principles and quantitative thinking. His team, composed of engineers, chemists, physicists, cell and developmental biologists, strives to develop technologies that have true biological and medicinal function and applicability. Lutolf’s work has led to more than 110 peer-reviewed scientific publications, many of which published in highly reputed journals, more than 25 patents, and the commercialization of several products. Current research in the Lutolf lab is focused on the bioengineering of miniature tissues, termed organoids, that are generated from self-organizing stem cells.

Freddy Radtke

Freddy Radtke obtained his Ph.D. in Molecular Biology from the University of Zürich in 1994. In 1995, he started his postdoctoral research in the laboratory of Michel Aguet at Genentech, Inc. (San Francisco, USA). In 1997, he returned to Switzerland with Michel Aguet and finished his postdoctoral fellowship at the Swiss Institute for Experimental Cancer Research (ISREC) in Lausanne. From 1999‑2005, he was a group leader and Associate Member at the Ludwig Institute for Cancer Research. Freddy Radtke then joined ISREC in January 2006 as a senior scientist and in July 2006, he was appointed Associate Professor at the EPFL School of Life Sciences

Official source

Ontological neighbourhood

Biological engineering

Biomedical engineering: Tissue engineering

Related concepts (32)

Haematopoietic system

The haematopoietic system is the system in the body involved in the creation of the cells of blood. Hematopoietic stem cell Haematopoietic stem cells (HSCs) reside in the medulla of the bone (bone marrow) and have the unique ability to give rise to all of the different mature blood cell types and tissues. HSCs are self-renewing cells: when they differentiate, at least some of their daughter cells remain as HSCs, so the pool of stem cells is not depleted. This phenomenon is called asymmetric division.

Haematopoiesis

Haematopoiesis (hɪˌmætəpɔɪˈiːsɪs,_ˌhiːmətoʊ-,_ˌhɛmə-, from Greek αἷμα, 'blood' and ποιεῖν 'to make'; also hematopoiesis in American English; sometimes also h(a)emopoiesis) is the formation of blood cellular components. All cellular blood components are derived from haematopoietic stem cells. In a healthy adult human, roughly ten billion () to a hundred billion () new blood cells are produced per day, in order to maintain steady state levels in the peripheral circulation.

Hematopoietic stem cell transplantation

Hematopoietic stem-cell transplantation (HSCT) is the transplantation of multipotent hematopoietic stem cells, usually derived from bone marrow, peripheral blood, or umbilical cord blood in order to replicate inside of a patient and to produce additional normal blood cells. It may be autologous (the patient's own stem cells are used), allogeneic (the stem cells come from a donor) or syngeneic (from an identical twin). It is most often performed for patients with certain cancers of the blood or bone marrow, such as multiple myeloma or leukemia.

Cell potency

Cell potency is a cell's ability to differentiate into other cell types. The more cell types a cell can differentiate into, the greater its potency. Potency is also described as the gene activation potential within a cell, which like a continuum, begins with totipotency to designate a cell with the most differentiation potential, pluripotency, multipotency, oligopotency, and finally unipotency. Totipotency (Lat. totipotentia, "ability for all [things]") is the ability of a single cell to divide and produce all of the differentiated cells in an organism.

Induced stem cells

Induced stem cells (iSC) are stem cells derived from somatic, reproductive, pluripotent or other cell types by deliberate epigenetic reprogramming. They are classified as either totipotent (iTC), pluripotent (iPSC) or progenitor (multipotent – iMSC, also called an induced multipotent progenitor cell – iMPC) or unipotent – (iUSC) according to their developmental potential and degree of dedifferentiation. Progenitors are obtained by so-called direct reprogramming or directed differentiation and are also called induced somatic stem cells.

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