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Medical Cell Biology Chapter 1 Introduction
Mind map of the introduction to the first chapter of Medical Cell Biology, which mainly contains an overview of cell biology, the formation and development trends of cell biology, etc. It’s full of useful information, friends in need should quickly collect it!
Edited at 2023-11-30 22:16:51
Medical Cell Biology Chapter 1 Introduction
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Chapter One Introduction
Overview of Cell Biology
Concepts and research contents of cell biology
Concept: Cell biology is a discipline that studies various life activities of cells from three levels: microscopic (optical microscopy), submicroscopic (ordinary electron microscopy), and molecular (high-resolution electron microscopy).
research content
Research object: cells (combine the structure and function of cells to understand the mechanisms and laws of basic life phenomena of organisms)
Two important research methods
Start with the phenotypic characteristics of cells and explore the molecular mechanisms hidden behind them.
Start with macromolecules such as genes or proteins to understand their impact on cell function or behavior
The status of cell biology in life sciences and its relationship with other disciplines
1. Important branches of life sciences
2. Cell biology and molecular biology are the foundation of modern life sciences. They have widely penetrated into research fields such as developmental biology, genetics, neurobiology and immunobiology.
3. Cell biology is not only a basic subject in life sciences, but also one of the frontier subjects in modern life sciences.
4. Cell biology is one of the most active research fields in life sciences
Medical cell biology is the science that explores the mechanisms of human individual development, functional activities of tissues and organs, and the occurrence of diseases and other life phenomena from the perspective of cells. Its disciplinary foundation mainly involves the basic knowledge system of eukaryotic cells (especially animal cells) in cell biology, and is a basic component of contemporary medical science.
The formation and development trends of cell biology
The discovery of cells and the creation of “cell theory”
discovery of cells
In 1665, the Englishman R.Hook discovered many cells arranged in a honeycomb shape, called "cells"
1674, Dutchman A.V. Leeuwenhoek: Improved magnification to nearly 300 times
The Creation of “Cell Theory”
The Proposition of "Cell Theory"
German botanist M.J.Schleiden and zoologist T.Schwann proposed the "cell theory": all living things, from single-celled organisms to higher animals and plants, are composed of cells. Cells are the basic units of biological morphological structure and functional activities.
German scientist R. Virchow made an important addition to the "cell theory" and clearly put forward the argument: all cells can only come from the original cell.
The significance of the establishment of "Cell Theory": it has played a positive role in promoting research and development in many fields of life sciences. Engels evaluated the "cell theory" as one of the three major discoveries of natural science in the 19th century (theory of evolution, the law of conservation of energy and transformation)
The classic period of cytology: From the mid-19th century to the early 20th century, the main content of cell research was the application of fixation and staining techniques to observe the morphological structure and cell division activities of cells under a light microscope.
Experimental cytology period (early 20th century to mid-20th century)
Main features: A variety of experimental methods are used to study the biochemical metabolism and physiological functions of cells.
The main work
Proposed the "gene theory", proving that genes are the basic units of genetic traits and are arranged linearly on chromosomes to form linkage groups.
Established tissue culture technology and methods for detecting nucleic acids in cells, and can isolate nuclei and various organelles from living cells to further study their physiological functions, chemical composition, and the location of various enzymes in organelles.
The formation and development of cell biology
The application of electron microscopy brings cytological research to the submicroscopic level
Discovered organelles that could not be seen under a light microscope in the past, such as endoplasmic reticulum, lysosomes, etc.
Clarified organelles such as the Golgi apparatus and their fine structures that were seen under a light microscope in the past
Research progress in molecular biology has promoted the formation and development of cell biology
Since the 1950s, molecular biology has entered a period of rapid development.
Proposed the DNA double helix structure model → Discovered that DNA replication is semi-conservative → Proposed the "central dogma" and the triplet code hypothesis → DNA recombination technology, DNA sequence analysis technology, etc. continue to penetrate into various fields of cytology, making the morphological structure of cells and physiological function research goes deep into the molecular level
In the 1960s, the discipline of studying various life activities of cells from the molecular level, subcellular level and overall cell level was formed, namely cell biology.
In 1990, the Human Genome Project (HGP) was launched
In 1993, China joined and assumed 1% of the sequence analysis tasks (the United States, Britain, France, Germany, Japan, and China)
In 2001, the working draft of the human genome was completed
Development trends in cell biology: theoretical advances and technological advances are the driving force behind its development
Molecular and cell biology research to interpret the biological significance of genome structure will enter a new period of rapid development
The study of cell structure and function at the individual level based on model animals, the interactions between cells, and the social relationships of division of labor and collaboration will become an important part of cell biology research.
Translational cell biology (i.e., the translation and application of cell biology theories) research, such as the study of stem cells and their applications in medicine...
cell biology and medicine
The relationship between cell biology and medicine
Cell biology is the foundation and pillar subject of modern medicine
The combination of the research content of cell biology and medical science resulted in medical cell biology
Medical cell biology aims to reveal the life activity patterns of various human cells in physiological and pathological processes. It is expected to provide an in-depth elucidation of the pathogenesis of various human diseases and provide theoretical basis and strategies for the diagnosis, treatment and prevention of diseases.
Medical cell biology mainly discusses cell biology issues related to medicine, which is the cornerstone of translational medicine.
Medical cell biology is one of the important basic medical courses for medical school students. It is not only the basis of clinical medicine, but also closely related to other disciplines of basic medicine.
Main research fields and medical significance of cell biology
Intercellular information transfer and cell signaling
Cell differentiation and stem cell research
Cell proliferation and cell cycle regulation
Cellular senescence and cell death
Cellular Genomics and Proteomics
Translational Medicine: The life medicine community moves from laboratory research discoveries into clinical practice to diagnosing and treating patients.