Postmortem acinar autolysis in rat sublingual gland: a morphometric study.

Area of Science:

• Histology
• Forensic Science
• Cell Biology

Background:

• Postmortem changes in glandular tissues are crucial for determining time of death.
• The sublingual gland's susceptibility to autolysis requires detailed investigation.

Purpose of the Study:

• To quantitatively analyze and characterize postmortem autolytic changes in rat sublingual glands.
• To establish a timeline for morphological and volumetric alterations in acinar cells.

Main Methods:

• Morphological and morphometric analysis of rat sublingual glands at 0, 3, 6, 12, and 24 hours postmortem.
• Light microscopy with an integration grid for assessing volume density of intact and autolyzed acini.
• Determination of gland density and processed gland volume.

Main Results:

• Significant temporal progression of nuclear alterations and loss of acinar cell architecture observed.
• Volume density of autolyzed acini (Vvaa) increased from 0.42% to 75.84%, while intact acini (Vvia) decreased from 71.16% to 0% over 24 hours.
• Total volume of autolyzed acini (Vtaa) increased significantly, with a growth rate of 3.38 mm³/h between 0-12 hours.

Conclusions:

• Acinar autolysis in rat sublingual glands shows marked progression within the initial 6 hours postmortem.
• Widespread autolytic changes are evident by 12 hours postmortem.
• These findings provide a quantitative basis for understanding postmortem tissue degradation.