Retinal control on the axial length mediated by transforming growth factor-beta in chick eye.

نویسندگان

  • S Honda
  • S Fujii
  • Y Sekiya
  • M Yamamoto
چکیده

PURPOSE To clarify retinal control on scleral growth in form-deprivation myopia (FDM) in the chick, the authors studied change in transforming growth factor-beta (TGF-beta) in the form-deprived eye and the effect of this growth factor on scleral cell proliferation and axial length. METHODS Change in TGF-beta in FDM in the chick was measured by reverse transcriptase polymerase chain reaction (RT-PCR), immunoblot, and immunohistochemistry. The effect of TGF-beta on [3H]thymidine uptake of scleral chondrocytes was determined by organ culture. Urokinase plasminogen activator (uPA) and plasminogen activator inhibitor-1 (PAI-1) were administered to determine the effect of TGF-beta activation on the axial length in normal and FDM eyes. RESULTS The content of TGF-beta messenger RNA (mRNA) and the active form of TGF-beta protein were reduced in FDM eyes compared with the control specimen. Reduced immunoreactivity of TGF-beta in FDM eyes was found in the photoreceptor layer. The TGF-beta inhibited [3H]thymidine uptake into scleral chondrocytes. In the nondeprived eyes, the vitreous chamber depth and axial length were reduced after uPA treatment, whereas PAI-1 increased them. In the form-deprived eyes, uPA inhibited vitreous depth and axial length elongation, but PAI-1 had no effect. CONCLUSIONS The authors' results suggest that TGF-beta mediates retinal control of ocular growth. Axial elongation in FDM probably is correlated with the reduction of TGF-beta in the retina, retinal pigment epithelium, and choroid. The uPA and PAI-1 treatment controls the activation of TGF-beta and affects axial length.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Evaluation of Transforming Growth Factor Beta 1 and Curcumin on Proliferation and Differentiation of Nasal-Derived Chondrocyte Seeded on the Fibrin Glue Scaffold

Introduction: Natural biomaterials and growth factors are key factors in tissue engineering. The objective of the present study was to evaluate transforming growth factor beta 1 (TGF-β1) and curcumin on proliferation and differentiation of nasal-derived chondrocyte seeded on the fibrin glue scaffold. Methods: Chondrocytes were isolated from nasal samples. Nasal-derived chon...

متن کامل

Transforming Growth Factor-β1 Preserves Bovine Nasal Cartilage against Degradation Induced by Interleukin-1α in Explant Culture

Background and Aims: Chondrocytes and their differentiation play a central role in joint diseases. Effect of the transforming growth factor (TGF)-β1 on chondrocyte characteristics and differentiation is not clearly understood. This study was undertaken to investigate the effects of TGF-β1 on tissue characteristics and morphology of chondrocytes against degradation induced by interleuk...

متن کامل

TGF-beta modulates programmed cell death in the retina of the developing chick embryo.

Programmed cell death (PCD) is a key phenomenon in the regulation of cell number in multicellular organisms. We have shown that reduction of endogenous transforming growth factor beta (TGF-beta) prevents apoptotic PCD of neurons in the developing peripheral and central nervous system, suggesting that TGF-beta is an important mediator of ontogenetic neuron death. Previous studies suggested that ...

متن کامل

Human Aqueous Humor Levels of TGF-β2: Relationship with Axial Length

PURPOSE To analyze the relationship between transforming growth factor-beta 2 (TGF- β 2) levels in the anterior chamber aqueous humor and axial length of patients with myopia. METHODS TGF- β 2 was measured with the Luminex xMAP Technology by using commercially available Milliplex xMAP Kits. Sixty-five aqueous humor samples were collected during cataract or clear lens extraction surgery and TG...

متن کامل

Development of chick axial mesoderm: specification of prechordal mesoderm by anterior endoderm-derived TGFbeta family signalling.

Two populations of axial mesoderm cells can be recognised in the chick embryo, posterior notochord and anterior prechordal mesoderm. We have examined the cellular and molecular events that govern the specification of prechordal mesoderm. We report that notochord and prechordal mesoderm cells are intermingled and share expression of many markers as they initially extend out of Hensen's node. In ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Investigative ophthalmology & visual science

دوره 37 12  شماره 

صفحات  -

تاریخ انتشار 1996