keratohyalin granule
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2004 ◽  
Vol 3 (3) ◽  
pp. 107-111 ◽  
Author(s):  
Trinh Hermanns-Lê ◽  
Roy Garcia ◽  
Jorge E. Arrese ◽  
Gérald E. Piérard
Keyword(s):  

1976 ◽  
Vol 22 (1) ◽  
pp. 161-171
Author(s):  
H. Jessen ◽  
P.D. Peters ◽  
T.A. Hall

The elemental composition of different types of keratohyalin granules from the epidermis of newborn and adult rats was studied by means of an EMMA-4 analytical electron microscope, equipped with an energy-dispersive X-ray spectrometer. An absolute quantitation of the sulphur concentration in keratohyalin granules was performed. The results demonstrate that epidermal keratohyalin granules are chemically heterogeneous. A type of keratohyalin granule present in the nuclei and cytoplasm of epidermal cells from both newborn and adult rats - termed single granules - is rich in sulphur, having a content of 2-5-3-6%. Other types of keratohyalin granules, which differ in newborn and adult rats, contain a sulphur-poor component; they often have a sulphur-rich component as well. The sulphur-poor keratohyalin contains 0-6-0-9% sulphur. It is suggested that the sulphur-rich keratohyalin granules are the source of the peripheral envelope protein of cornified cells.


1974 ◽  
Vol 15 (2) ◽  
pp. 359-377
Author(s):  
H. JESSEN ◽  
P. D. PETERS ◽  
T. A. HALL

The elemental composition of keratohyalin granules from the interpapillary and papillary lingual epithelium and the oesophageal epithelium of the rat were studied by X-ray microanalysis in an EMMA-4 analytical electron microscope, equipped with an energy dispersive detector. A quantitative assay of the sulphur concentration in keratohyalin granules was performed, using a suitable sulphur standard. The results demonstrate that different types of keratohyalin granule have different compositions. Single granules - a type of keratohyalin granule present in both nuclei and cytoplasm of the epithelial cells - are rich in sulphur, having a content of 3.6-3.8%. Another type of keratohyalin granule - composite granules - contains a sulphur-rich component and a sulphur-poor component. The sulphur-poor component contains 0.8-1.4% sulphur. It is suggested that the sulphur-rich keratohyalin granules are involved in the deposition of the peripheral envelope protein of cornified cells.


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