Related Experiment Video
Updated: Apr 17, 2026
Oxygen-Induced Retinopathy Model for Ischemic Retinal Diseases in Rodents
Published on: September 16, 2020
Expression of peroxisome proliferator-activated receptor γ in rat retina during development
1The Fourth Affiliated Hospital of Nantong Medical College, Yancheng City No.1 People's Hospital, Yancheng 224006, Jiangsu Province, China.
Insights
Peroxisome proliferator-activated receptor gamma (PPARγ) expression in rat retina changes significantly during development. PPARγ is crucial for retinal cell differentiation and maturation.
Area of Science:
- Developmental Biology
- Ophthalmology
- Molecular Biology
Background:
- The retina undergoes complex differentiation during embryonic and postnatal development.
- Peroxisome proliferator-activated receptor gamma (PPARγ) is a nuclear receptor with known roles in various cellular processes.
Purpose of the Study:
- To investigate the spatiotemporal expression patterns of PPARγ in the developing rat retina.
- To elucidate the potential role of PPARγ in retinal development.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) was used to quantify PPARγ mRNA levels.
- Immunohistochemistry was employed to visualize PPARγ protein distribution.
- Hematoxylin and eosin (HE) staining assessed retinal structural changes.
Main Results:
- PPARγ mRNA was detected early in gestation (GD13), decreased with maturation, and increased significantly postnatally (P5).
- PPARγ protein was present in the neuroepithelium early in development, decreased later, but remained in the ganglion cell layer.
- Postnatal development showed increased PPARγ protein, primarily in the nerve fiber layer, ganglion cell layer, and outer retinal layers.
Conclusions:
- The dynamic spatiotemporal expression of PPARγ suggests its involvement in regulating retinal cell differentiation.
- PPARγ may play a significant role in the maturation of various retinal cell types.
Aim:
To evaluate the spatiotemporal expression pattern of PPARγ in embryonic and early postnatal stages of rat retina.
Methods:
Fetal rats were collected at 13-18d of gestation (GD) from pregnant females and postnatal rats at 1d (P1) and 5d (P5) after birth were also used. We used RT-PCR to detect PPARγ mRNA and immunohistochemical to observe PPARγ protein. And at last, we chose HE staining showed the structural changes of rat retina during development.
Results:
RT-PCR analysis showed that PPARγ mRNA was expressed as early as GD13 and gradually decreased as maturation continued. However, the PPARγ gene expression significantly increased after birth, especially in P5. Immunohistochemical analysis showed PPARγ protein was expressed throughout the retinal neuroepithelium at GD13 and GD14, and then decreased during late embryogenesis but remained relatively high in the predicted ganglion cell zone. During postnatal development, PPARγ protein was remarkably increased and the positive signals were mainly located in nerve fiber layer (NFL), ganglion cell layer (GCL) and outer layers of the retina.
Conclusion:
The spatiotemporal changes of PPARγ expression demonstrated that PPARγ might play a role in regulating the differentiation and maturation of retinal cells.
