Last edited by Miran
Monday, May 11, 2020 | History

3 edition of Aqueous humor growth factors and their receptors on trabecular cells found in the catalog.

Aqueous humor growth factors and their receptors on trabecular cells

Navaneet Singh Chailert Borisuth

Aqueous humor growth factors and their receptors on trabecular cells

by Navaneet Singh Chailert Borisuth

  • 398 Want to read
  • 10 Currently reading

Published .
Written in English

    Subjects:
  • Aqueous humor.,
  • Eye.

  • Edition Notes

    Statementby Navaneet Singh Chailert Borisuth.
    Classifications
    LC ClassificationsMicrofilm 94/2548 (Q)
    The Physical Object
    FormatMicroform
    Paginationxv, 253 leaves
    Number of Pages253
    ID Numbers
    Open LibraryOL1241994M
    LC Control Number94628748

    •Vitreous humor: the posterior cavity also contains aqueous humor but vitreous humor makes up most of its volume; clear gel formed in embryo, maintained throughout life •Retina: the pigmented part of the retina absorbs light that passes through the neural part, preventing light from bouncing back through the neural part and producing visual. POAG is the most common form of glaucoma that accounts for >80% of cases in the Western hemisphere. The ‘angle’ refers to the iridocorneal cleft between the iris and the cornea which is “open” in normal eye and POAG (Figure 7A & Figure 7B) and offers access to aqueous humor flowing into the trabecular meshwork and Schlemm’s canal.

    Excitotoxicity seems to play a critical role in ocular neurodegeneration. Excess-glutamate-mediated retinal ganglion cells death is the principal cause of cell loss. Uncontrolled glutamate in the synapsis has significant implications in the pathogenesis of neurodegenerative disorders. The exploitation of various approaches of controlled release systems enhances the Author: Javier Rodríguez Villanueva, Jorge Martín Esteban, Laura J. Rodríguez Villanueva.   Transmembrane receptors and their ligands RHO-GTPase ROCK Myosin light chain (MLC) phosphorylation cytoskeletal changes, cell motility, and smooth muscle contraction Trabecular meshwork cells possess smooth muscle-like properties Influence aqueous humor outflow facility RHO-dependent transduction pathway

    The Eye's Aqueous Humor Mortimer M. Civan (Eds.) DESCRIPTION: Current Topics in Membranes provides a systematic, comprehensive, and rigorous approach to specific topics relevant to the study of cellular membranes.   The effects of neuromedin U (NMU) on aqueous humor (AH) outflow were determined in enucleated porcine eyes. RESULTS: Expression of a constitutively active form of RhoA (RhoAV14), activation of Rho GTPase by bacterial toxin, or inhibition of Rho kinase by Y in HTM cells led to significant but contrasting changes in CTGF protein levels that.


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Aqueous humor growth factors and their receptors on trabecular cells by Navaneet Singh Chailert Borisuth Download PDF EPUB FB2

Aqueous humor is an optically clear, slightly alkaline ocular fluid that is continuously formed (~ μL/min in humans) from plasma by epithelial cells of ciliary body [34].Three different processes – diffusion, ultrafiltration and active secretion – contribute to the chemical composition and formation of aqueous humor.

These studies suggest that myocilin secretion from trabecular meshwork cells occurs in a Golgi-independent manner following human aqueous humor treatment. Heat-labile factors in human aqueous humor are responsible for the time- and dose-dependent release of myocilin from vesicle-like structures within the cytoplasm of trabecular meshwork by: Growth factors are secreted proteins that usually act over short distances.

Historically, the mechanism of action of growth factors was considered to be via paracrine signaling (e.g. cell-to-cell communication via soluble factors). However, it is now appreciated that growth factors can stimulate the same cell from which it has been released via an autocrine mechanism, or can Cited by: 5.

Aqueous Humor Outflow. Aqueous humor is produced by the ciliary body epithelium in the posterior chamber and flows into the anterior chamber.

It is a complex mixture of electrolytes, organic solutes, growth factors, and other proteins that supply nutrients to the nonvascularized tissues of the anterior chamber (i.e., trabecular meshwork [TM], lens, and corneal endothelium).

Mechanism of Aqueous Humor Secretion, Its Regulation and Relevance to Glaucoma 21 retinal ganglion cells (Aslan et al., ; Te zel, ); autoimmune reactions in which an. The total transforming growth factor (TGF) beta(2) concentration in the anterior chamber aqueous humor of 96 cataract patients with ages ranging from.

The trabecular meshwork is an area of tissue in the eye located around the base of the cornea, near the ciliary body, and is responsible for draining the aqueous humor from the eye via the anterior chamber (the chamber on the front of the eye covered by the cornea).

The tissue is spongy and lined by trabeculocytes; it allows fluid to drain into a set of tubes called Schlemm's MeSH: D This review focuses on the properties of trabecular meshwork cells, from their characteristic expression profile in vivo to their responsiveness to biochemical and biophysical signals in vitro.

Hopefully the study of cultured trabecular meshwork cells will provide a better understanding of glaucoma and lead to new, much needed by:   TGF-β elevation in the aqueous humour of glaucomatous eyes. Various growth factors and cytokines are found within the aqueous humour (AH).

InGranstein et al concluded that levels of TGF-β in the AH were sufficient to serve a purpose in normal ocular physiology.9 Significant levels of TGF-β in the AH of normal eyes have been repeatedly Cited by:   Formation of aqueous humor • Ciliary processes are the site of aqueous production • Aqueous humor primarily derived from plasma within the capillary network of ciliary processes • Presently it is agreed that diffusion, ultrafiltration, and secretion play role in aqueous production at different levels • Major factor in aqueous production.

Interestingly, aqueous humor contains growth factors known to affect alternative splicing of fibronectin, yet fibronectin found in the aqueous humor lacks both the EDA and EDB domains and this was unchanged in patients with POAG.

In both cataract patients and patients with POAG, EDA− and EDB− fibronectin is the predominant form of Author: Jennifer A. Faralli, Mark S. Filla, Donna M. Peters. 89 Control of Aqueous Humor Flow, Jay McLaren.

90 Ciliary blood flow and its role in aqueous humor formation, Jeffrey Kiel. 91 Pharmacology of aqueous humor formation, Carol Toris. 92 Functinal morphology of the trabecular meshwork, Ernst Tamm.

93 Biomechanics of Aqueous Humor Outflow Resistance, Mark JohnsonBook Edition: 1. Aqueous Humor: Secretion and Dynamics B'Ann True Gabelt Julie A. Kiland Baohe Tian Paul L. Kaufman The aqueous humor is a transparent, colorless solution continuously formed from plasma by the epithelial cells of the ciliary processes.

It is secreted into the posterior chamber, passes from the posterior chamber through the pupil into the anterior chamber. Our Business Hours: Monday – Friday, 8am-5pm Pacific Standard Time Shipping Policy: We offer same day shipping for all orders received before 10am Pacific Standard Time, from Monday-Thursday* *This applies to Domestic orders : $ Myocilin expression in Trabecular Meshwork Cells was analyzed following dexamathone treatment.

After cells reach % confluency, HTMC cells were treated with nM and nM of dexamethasone for 6 days in DMEM with 1% FBS. Cell lysates were analyzed for Myocilin and beta-Actin expression by Western Blot.

ease characterized by increased resistance to aqueous humor outflow through the trabecular meshwork (TM) and Schlemm’s canal (SC) [1,2]. It is thought that impairment of trabecular meshwork function is a major cause for the elevated intraocu-lar pressure, which eventually leads to the death of retinal gan-glion cells associated with POAG [1,3,4].

A theoretical model is presented that is able to explain for the first time the pressure drop across the trabecular meshwork. The ramified flow paths in the subendothelial region of the trabecular meshwork can be interpretated as a filter bed.

Data from transmission electron microscope (TEM) photographs are the starting point of the theoretical by: Development and Structure of the TM. The anterior segment includes the cornea, lens, iris, ciliary body and ocular drainage tissues, primarily the TM and Schlemm's canal (SC) [].The TM and SC are located in the iridocorneal angle, where the iris and cornea meet and the sclera transitions into the cornea [].The ocular drainage structures are among the last to differentiate during anterior.

Aqueous Humor: Secretion and Dynamics B'Ann T. Gabelt Julie A. Kiland Baohe Tian Paul L. Kaufman The aqueous humor is a transparent, colorless solution continuously formed from plasma by the epithelial cells of the ciliary processes. It is secreted into the posterior chamber from where it passes from the posterior chamber through the pupil into.

The chemical components of aqueous humor derive from many sources, the principal ones being plasma (by passive diffusion) and the ciliary epithelium (mainly by active secretion) (Cole, ).

Specific substances also enter the aqueous humor by diffusion (or secretion) from surrounding tissues: corneal endothelium, lens, and by: 9.

1. Function and structure of the cornea. The cornea is responsible for protecting the eye against insults such as injury and infection. It also provides the majority (two thirds) of the total refractive power of the eye and is therefore the major refracting lens (Meek et al., ).

The cornea is comprised of five layers (see Figure 1), the outermost non-keratinised stratified epithelium.CONCLUSIONS. Addition of human aqueous humor rather than FBS to trabecular monolayer cell cultures triggers significant changes in cellular and molecular characteristics.

The protein component of aqueous humor is responsible for these changes. Aqueous humor supplementation may maintain cultured trabecular cells in a more physiologic by: MAJOR CAUSE OF BLINDNESS.

more common in 60+, can occur at any age. Ciliary body of in eye continually produces fluid called aqueous humor. This fluid circulates freely between posterior and anterior chambers of eye and passes through .