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A scanning electron microscopy of subcellular structures of the human hepatic cell
Abstract:
Human liver specimens obtained by needle biopsy were extensively osmicated by the revised tannin-osmium method of MURAKAMI (1974) and cracked in air after critical point drying, to be observed in the scanning electron microscope. The fracture tended to occur along the membranous elements and exposed beautifully fractured faces of the hepatic cell. The nucleus of the hepatic cell was spherical. The nuclear pores were demonstrated as small pits 0.1 mu in diameter and their total occurrence in one nucleus was estimated to be 2,100. In the spongy framework resembling the endoplasmic reticulum, oval-shaped mitochondria and multivesicular tufts of the Golgi complex were observed. The nucleolus of the hepatic cell nucleus was noticed as a highlighted mass in the cloudy nucleoplasm.
Insights
This study used scanning electron microscopy to visualize human liver cells, revealing detailed structures like the nucleus, mitochondria, and Golgi complex. The findings offer new insights into hepatic cell morphology and organization.
Area of Science:
- Cell Biology
- Histology
- Microscopy
Background:
- Understanding the intricate structure of human liver cells (hepatocytes) is crucial for diagnosing and treating liver diseases.
- Previous imaging techniques had limitations in visualizing the fine details of hepatocyte ultrastructure.
Purpose of the Study:
- To employ advanced scanning electron microscopy (SEM) techniques for detailed visualization of human hepatocyte ultrastructure.
- To characterize the morphology and spatial arrangement of key organelles within hepatocytes.
Main Methods:
- Human liver tissue was obtained via needle biopsy.
- Specimens underwent extensive osmication using the revised tannin-osmium method.
- Samples were critical point dried and fractured in air for SEM observation.
Main Results:
- SEM revealed well-fractured surfaces of hepatocytes, exposing cellular components.
- The nucleus appeared spherical with approximately 2,100 nuclear pores (0.1 μm diameter).
- Mitochondria and Golgi complexes were clearly visualized within the endoplasmic reticulum-like framework.
Conclusions:
- The revised tannin-osmium method combined with SEM provides high-resolution imaging of hepatocyte ultrastructure.
- This technique allows for detailed morphological analysis of hepatic cells, aiding in the study of liver function and pathology.