α(2u)-Globulin in modified sebaceous glands with pheromonal functions: localization of the protein and its mRNA in preputial, meibomian, and perianal glands

M. A. Mancini, D. Majumdar, Bandana Chatterjee, A. K. Roy

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Abstract

α(2u)-Globulin, the principal urinary protein of the male rat, has extensive sequence homology with many lipid binding proteins. The highest concentration of α(2u)-globulin is found in the preputial gland, a holocrine secretory organ with pheromonal function. Meibomian and perianal glands are two other modified sebaceous glands with holocrine secretory cycles and pleiomorphic peroxisomes capable of synthesizing pheromonal lipids. Immunocytochemical examination shows the presence of α(2u)-globulin in the acinar cells of all three of these modified sebaceous glands. Whereas in the preputial gland all of the acinar cells exhibit immunoreactivity, in the meibomian and perianal glands only selective cells contain α(2u)-globulin. In the case of the preputial gland, in addition to the acinar cells some stratified epithelial cells also were immunoreactive. In the perianal and meibomian glands, keratinocytes lining nearby hair shafts and select cells of accessory oil glands stained for α(2u)-globulin. In situ hybridization with a cloned cRNA probe confirmed the immunocytochemical data. Presence of the α(2u)-globulin mRNA in these glands was also established by Northern blot analysis. Immunoelectron microscopic examination of preputial α(2u)-globulin showed the presence of this protein in secretory granules of various maturational stages. Immunolabeled α(2u) was also found in attached vesicles containing protein and lipid inclusions. The lytic cells were not only loaded with α(2u)-globulin but also contained sharp-edged, irregularly shaped electron-dense granules which stained heavily for this protein. Specific localization of α(2u)-globulin and its mRNA in three pheromone-producing sebaceous glands and its structural homology with known lipid binding proteins indicate a pheromone carrier role of α(2u)-globulin.

Original languageEnglish (US)
Pages (from-to)149-157
Number of pages9
JournalJournal of Histochemistry and Cytochemistry
Volume37
Issue number2
StatePublished - 1989

Fingerprint

Perianal Glands
Meibomian Glands
Sebaceous Glands
Globulins
Messenger RNA
Proteins
Acinar Cells
Lipids
Pheromones
Carrier Proteins
Complementary RNA
Peroxisomes
Secretory Vesicles
Sequence Homology
Keratinocytes
Northern Blotting
Hair

ASJC Scopus subject areas

  • Cell Biology
  • Anatomy

Cite this

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title = "α(2u)-Globulin in modified sebaceous glands with pheromonal functions: localization of the protein and its mRNA in preputial, meibomian, and perianal glands",
abstract = "α(2u)-Globulin, the principal urinary protein of the male rat, has extensive sequence homology with many lipid binding proteins. The highest concentration of α(2u)-globulin is found in the preputial gland, a holocrine secretory organ with pheromonal function. Meibomian and perianal glands are two other modified sebaceous glands with holocrine secretory cycles and pleiomorphic peroxisomes capable of synthesizing pheromonal lipids. Immunocytochemical examination shows the presence of α(2u)-globulin in the acinar cells of all three of these modified sebaceous glands. Whereas in the preputial gland all of the acinar cells exhibit immunoreactivity, in the meibomian and perianal glands only selective cells contain α(2u)-globulin. In the case of the preputial gland, in addition to the acinar cells some stratified epithelial cells also were immunoreactive. In the perianal and meibomian glands, keratinocytes lining nearby hair shafts and select cells of accessory oil glands stained for α(2u)-globulin. In situ hybridization with a cloned cRNA probe confirmed the immunocytochemical data. Presence of the α(2u)-globulin mRNA in these glands was also established by Northern blot analysis. Immunoelectron microscopic examination of preputial α(2u)-globulin showed the presence of this protein in secretory granules of various maturational stages. Immunolabeled α(2u) was also found in attached vesicles containing protein and lipid inclusions. The lytic cells were not only loaded with α(2u)-globulin but also contained sharp-edged, irregularly shaped electron-dense granules which stained heavily for this protein. Specific localization of α(2u)-globulin and its mRNA in three pheromone-producing sebaceous glands and its structural homology with known lipid binding proteins indicate a pheromone carrier role of α(2u)-globulin.",
author = "Mancini, {M. A.} and D. Majumdar and Bandana Chatterjee and Roy, {A. K.}",
year = "1989",
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pages = "149--157",
journal = "Journal of Histochemistry and Cytochemistry",
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T1 - α(2u)-Globulin in modified sebaceous glands with pheromonal functions

T2 - localization of the protein and its mRNA in preputial, meibomian, and perianal glands

AU - Mancini, M. A.

AU - Majumdar, D.

AU - Chatterjee, Bandana

AU - Roy, A. K.

PY - 1989

Y1 - 1989

N2 - α(2u)-Globulin, the principal urinary protein of the male rat, has extensive sequence homology with many lipid binding proteins. The highest concentration of α(2u)-globulin is found in the preputial gland, a holocrine secretory organ with pheromonal function. Meibomian and perianal glands are two other modified sebaceous glands with holocrine secretory cycles and pleiomorphic peroxisomes capable of synthesizing pheromonal lipids. Immunocytochemical examination shows the presence of α(2u)-globulin in the acinar cells of all three of these modified sebaceous glands. Whereas in the preputial gland all of the acinar cells exhibit immunoreactivity, in the meibomian and perianal glands only selective cells contain α(2u)-globulin. In the case of the preputial gland, in addition to the acinar cells some stratified epithelial cells also were immunoreactive. In the perianal and meibomian glands, keratinocytes lining nearby hair shafts and select cells of accessory oil glands stained for α(2u)-globulin. In situ hybridization with a cloned cRNA probe confirmed the immunocytochemical data. Presence of the α(2u)-globulin mRNA in these glands was also established by Northern blot analysis. Immunoelectron microscopic examination of preputial α(2u)-globulin showed the presence of this protein in secretory granules of various maturational stages. Immunolabeled α(2u) was also found in attached vesicles containing protein and lipid inclusions. The lytic cells were not only loaded with α(2u)-globulin but also contained sharp-edged, irregularly shaped electron-dense granules which stained heavily for this protein. Specific localization of α(2u)-globulin and its mRNA in three pheromone-producing sebaceous glands and its structural homology with known lipid binding proteins indicate a pheromone carrier role of α(2u)-globulin.

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