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Annulate lamellae in hamster pineal gland
C D Bucana1, M J Nadakavukaren, J L Frehn
1Biological Sciences Department, Illinois State University, Normal, Illinois 61761.
Tissue & Cell
|January 1, 1971
Summary
Annulate lamellae were found in the pinealocytes of young adult hamsters. Their presence near cellular structures suggests a role in the physiological functions of these light-sensitive cells.
Area of Science:
- Cell Biology
- Endocrinology
- Chronobiology
Background:
- The pineal gland, crucial for regulating circadian rhythms, produces melatonin.
- Pinealocytes are the primary cell type within the pineal gland.
- Understanding cellular structures within pinealocytes can elucidate their function.
Purpose of the Study:
- To investigate the presence and location of annulate lamellae in hamster pinealocytes.
- To explore the association of annulate lamellae with other organelles within pinealocytes.
Main Methods:
- Light microscopy was used to examine pineal gland tissue from hamsters.
- Hamsters were maintained under a controlled 14-10 light-dark photoperiod.
Main Results:
- Annulate lamellae were identified within the pinealocytes of adult hamsters.
- These structures were predominantly found in light pinealocytes, adjacent to the nucleus, Golgi apparatus, and agranular endoplasmic reticulum.
- A notable association between annulate lamellae and microtubules was observed.
Conclusions:
- Annulate lamellae are present in hamster pinealocytes under specific photoperiod conditions.
- The proximity of annulate lamellae to organelles and microtubules suggests a potential role in pinealocyte physiology.
- Further research is warranted to determine the precise function of annulate lamellae in these cells.
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