Bladder cells feel stretch

Aug 07, 2009

Japanese research group led by Prof. Makoto Tominaga and Dr. Takaaki Sokabe (National Institute for Physiological Sciences: NIPS), and Prof. Masayuki Takeda, Dr. Isao Araki and Dr. Tsutomu Mochizuki (Yamanashi Univ.), found that bladder urothelial cells have a sensor for stretch stimulation. Their finding was reported in the Journal of Biological Chemistry published on Aug 7, 2009.

Bladder is known to release ATP that activates micturition reflex pathway during urine storage. However, it has been unknown how urothelial cells sense bladder distension. The research group examined the function of 'TRPV4' protein abundantly expressed in urothelial cells. The group developed a special apparatus to measure cell responses upon stretch stimulation, which mimics bladder distension.

Upon stretch stimulation, robust Ca2+ influx and following ATP release were observed in urothelial cells. These phenomena were almost completely attributed to TRPV4 activation, since such responses were eliminated by a TRPV4 inhibitor and reduced in TRPV4-deficient urothelial cells.

Dr. Sokabe said, "This is the first report to show that TRPV4 is a primal stretch-detector in urothelial cells. Given that TRPV4 is critically involved in the sensing mechanism in the bladder, development of chemicals modulating TRPV4 activity may be useful for treatment of bladder disorders such as overactive and pollakiuria."

Source: National Institute for Physiological Sciences

Explore further: Estrogen helps calm stressed cells, researchers find

add to favorites email to friend print save as pdf

Related Stories

Scientists move closer to bio-engineered bladders

Aug 01, 2007

Researchers at the University of York are using an understanding of the special cells that line the bladder to develop ways of restoring continence to patients with serious bladder conditions, including cancer.

Painful heat sensed by 'painless' in flies

Sep 30, 2008

Japanese research group led by Prof Makoto Tominaga and Dr Takaaki Sokabe, National Institute for Physiological Sciences (NIPS), Japan, found that a small fly, drosophila, has a receptor for noxious heat. The research group ...

Green tea may protect the bladder from becoming inflamed

May 20, 2007

Herbal agents could be used to treat inflammatory bladder diseases, according to a preliminary study that looked at the ability of green tea to protect bladder cells from inflammation. The University of Pittsburgh School ...

Frankincense oil -- a wise man's remedy for bladder cancer

Mar 18, 2009

Originating from Africa, India, and the Middle East, frankincense oil has been found to have many medicinal benefits. Now, an enriched extract of the Somalian Frankincense herb Boswellia carteri has been shown to kill off ...

Recommended for you

A refined approach to proteins at low resolution

Sep 19, 2014

Membrane proteins and large protein complexes are notoriously difficult to study with X-ray crystallography, not least because they are often very difficult, if not impossible, to crystallize, but also because ...

Base-pairing protects DNA from UV damage

Sep 19, 2014

Ludwig Maximilian University of Munich researchers have discovered a further function of the base-pairing that holds the two strands of the DNA double helix together: it plays a crucial role in protecting ...

User comments : 0