Morphological, stereological and radiological changes in pinealectomized chicken cervical vertebrae.

Area of Science:

• Bone Biology
• Endocrinology
• Animal Science

Background:

• Melatonin is hypothesized to play a crucial role in osteogenesis.
• The pineal gland's influence on bone development, particularly in the vertebral column, requires further investigation.

Purpose of the Study:

• To investigate the histological and radiological changes in the cervical vertebrae of pinealectomized chickens.
• To evaluate the effect of pinealectomy on bone mineral density and vertebral morphology in broiler chickens.

Main Methods:

• Surgical pinealectomy was performed on 3-day-old Hybro broiler chickens.
• Computed tomography (CT) scans were used to analyze vertebral density histograms.
• Bone mineral density (BMD), macroscopic, radiographic, and histopathological evaluations were conducted on cervical vertebrae specimens.

Main Results:

• Pinealectomized chickens exhibited significantly lower mean bone mineral density (BMD) in vertebral bodies compared to controls.
• Pinealectomy led to heterogeneous bone tissue in vertebral bodies and significantly reduced vertebral weight and length.
• A high incidence of scoliotic curvature was observed in the pinealectomized group, with altered osteocyte and osteoblast numerical densities.

Conclusions:

• Pinealectomy induces significant histomorphometrical changes in the chicken vertebral column.
• The pineal gland and melatonin may possess an osteoinductive effect on bone formation.
• Further research is needed to correlate these findings with conditions like postmenopausal and senile osteoporosis.