Navigation Links
Sodium channel blocker shows promise as a potential treatment for cystic fibrosis
Date:5/17/2009

ATS 2009, SAN DIEGOCystic fibrosis patients may benefit from a new therapy that increases airway hydration, preventing the buildup of mucous, which is a key factor in the disease, according to researchers at Parion Sciences in Durham, N.C.

The research will be presented on Sunday, May 17, during the American Thoracic Society's 105th International Conference in San Diego.

"Our results suggest that we have identified a new agent that acts directly on a specific pathway, which is involved in the development of cystic fibrosis," said lead author Andrew Hirsh, Ph.D., senior director of drug discovery and preclinical development for Parion Sciences.

In normal respiration, the moist surface of the airway allows individuals to effectively clear mucous, keeping airways open and viable. But in individuals with cystic fibrosis, the hydration level of the airway is altered and the airway mucous builds up, interfering with normal respiration. One of the mechanisms causing airways to not clear mucous correctly in these patients involves the body's natural homeostasis of sodium which, when absorbed too quickly from the surface of the airway, causes moisture to become absorbed too quickly.

"Cystic fibrosis patients have a genetic ion transport defect, which decreases the hydration level on the airway surface and therefore reduces the body's ability to effectively clear mucous, which is a primary defense mechanism of the respiratory system," Dr. Hirsh said. "Diminished mucous clearance leads to chronic respiratory infection and impaired pulmonary function. Currently there are no therapies available to specifically target this channel in patients with cystic fibrosis."

The aerosol-based therapy uses a specific epithelial sodium channel-blocking agent called GS-9411, which prevents sodium from being absorbed across the airway, allowing the surface to remain moist. The increase in moisture allows individuals to more effectively clear the airway of mucous and infectious agents.

This study was performed during the pre-clinical stage of development to compare GS-9411 to an established epithelial sodium channel blocker, called amiloride. Currently, GS-9411 is in Phase I clinical trials being conducted by Parion's development partner, Gilead Sciences, Inc., in Foster City, CA.

During the study, researchers applied GS-9411 to airway surface cells grown in the laboratory, and assessed the potency and reversibility of the drug on these cells. Results of the study indicated GS-9411 allowed the cells to retain liquid for more than eight hours. Concurrent animal studies revealed that the agent enhanced mucous clearance for more than four hours.

The results offer new hope for cystic fibrosis sufferers, according to Dr. Hirsh. "The potency and the length of time that the drug was effective in cells and in animal studies was an outstanding feature that distinguishes this compound from other agents," he said.

The clinical phase of the drug development cycle will enable researchers to continue to refine the treatment for eventual distribution to cystic fibrosis patients.

"GS-9411 administered by aerosol can effectively increase airway surface liquid and enhance mucous clearance in an animal model," he said. "The results demonstrate that GS-9411 warrants further investigation as a new drug therapy to decrease respiratory infection and improve pulmonary function."


'/>"/>

Contact: Keely Savoie
ksavoie@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

Related medicine news :

1. Health Alliance Announces First Fracture Protection Program for Actonel(R) (risedronate sodium) Tablets
2. Perrigo Announces FDA Approval for Sulfacetamide Sodium Topical Suspension USP, 10% (Lotion)
3. Watson Pharmaceuticals and Elan Settle Lawsuit Over Naproxen Sodium
4. Grocery Manufacturers Association Releases Science Policy Paper on Sodium and Salt
5. Sodium, Potassium Intake Tied to Heart Disease
6. Consumer Reports Identifies Foods With Surprisingly High Levels of Sodium
7. Watson Announces District Court Ruling in Naproxen Sodium Patent Suit
8. Lupin Receives USFDA Approval for Divalproex Sodium Delayed-Release Tablets
9. Low-sodium advice for asthmatics should be taken with a pinch of salt
10. Low-sodium advice for asthmatics should be taken with a grain of salt
11. Roxane Laboratories, Inc. Initiates a Nationwide Voluntary Recall of Two Manufacturing Lots of Sodium Polystyrene Sulfonate Suspension in the US and Puerto Rico
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2017)... ... June 26, 2017 , ... Antoine Dental Center is now offering various types ... replacement and act as a support for prosthetic teeth, such as crowns, bridges, or dentures. ... and becomes a sturdy, lasting new root for the tooth. , Several types of ...
(Date:6/26/2017)... ... 26, 2017 , ... The Centers for Advanced Orthopaedics (The ... Richard Robinson as chief operating officer (COO). In this role, Robinson brings more ... record of simplifying business processes and developing growth strategies to increase market share. ...
(Date:6/26/2017)... ... June 26, 2017 , ... ... leakage is revolutionizing the way women look and feel about themselves and their ... of female sexual dysfunction and urinary leakage head on with a ground breaking ...
(Date:6/26/2017)... Antonio, TX (PRWEB) , ... June 26, 2017 ... ... physicians, their coding staff, and consumers are seeing lots of red these days. ... receive contain inaccurate charges that result from medical coding errors(1). Some studies point ...
(Date:6/26/2017)... WI (PRWEB) , ... June 26, 2017 , ... New ... consultations from Dr. Angela Cotey, with or without a referral. Dr. Cotey is a ... benefits of this preferred tooth replacement option. , Patients with missing teeth in Fitchburg, ...
Breaking Medicine News(10 mins):
(Date:6/3/2017)... June 3, 2017  Eli Lilly and Company ... results from the Phase 3 MONARCH 2 study ... 6 inhibitor, in combination with fulvestrant, significantly improved ... alone in women with hormone-receptor-positive (HR+), human epidermal ... who have relapsed or progressed after endocrine therapy ...
(Date:5/30/2017)... , May 30, 2017 Therapix Biosciences Ltd. ... specializing in the development of cannabinoid-based drugs, today ... company overview at three upcoming scientific and investor ... LD Micro Invitational: ... Date:                     ...
(Date:5/23/2017)... , May 23, 2017  Leaf Healthcare, ... innovative medical devices for pressure ulcer prevention, will ... American Association of Critical Care Nurses, National Teaching ... 22-25. The Leaf Patient Monitoring System ... for the hospital environment.  The system seamlessly tracks ...
Breaking Medicine Technology: