Navigation Links
Nanosecond-scale release of stinging jellyfish nematocysts

By using an electronic ultra-high-speed camera, researchers have characterized the explosive discharge of stinging jellyfish nematocytes and show that this event represents one of the fastest cellular processes in nature. The research is reported by Thomas Holstein of the University of Heidelberg and his colleagues in the May 9th issue of Current Biology.

Nematocysts (also known as cnidocysts) of jellyfish and other cnidarians are giant exocytotic organelles of the stinging cells used for prey capture and defense. These miniature cellular weapons contain a cocktail of hemolytic and neurotoxic poisons, making some cnidarians the most venomous animals known. Injection of the toxins requires an effective release mechanism that breaks the physical barrier of the prey's outer-surface tissue. It was known already that a high pressure (15 MPa) drives nematocyst discharge, and that stylets can penetrate even thick crustacean shells. However, neither the kinetics nor the forces involved were known, simply because discharge is so fast that it had not been previously resolved by conventional high-speed imaging.

To clarify these issues, the researchers studied nematocyst discharge with an electronic framing-streak camera at a framing rate of 1,430,000 frames per second. They show discharge kinetics of nematocysts in Hydra to be as short as 700 nanoseconds, creating an acceleration of up to 5,410,000 g. The researchers calculate that although the accelerated mass is very small (~1 nanogram), a pressure generated at the site of impact is more than 7 GPa, which is in the range of that generated by some bullets, and sufficient to penetrate the cuticle of crustacean prey. The researchers propose that the high speed of discharge is caused by the release of energy stored in the stretched configuration of the collagen-polymer of the nematocyst capsule wall. This ingenious solution allows the cellular process of vesicle exocytosis to release kinetic energy in the nanoseco nd range by a powerful molecular spring mechanism.


'"/>

Source:Cell Press


Related biology news :

1. Inflammatory molecules released by pollen trigger allergies
2. MSI releases moleculizer - a new approach to simulation of intracellular biochemical networks
3. GenMAPP 2.0 released
4. Agilent Technologies releases automated literature search tool for biology researchers
5. Agilent Technologies releases probe sequence, annotation information for all its commercial gene expression microarrays
6. UCSD study clarifies insulins role in blocking release of energy in patients with type II diabetes
7. Public release of pig genomic sequences
8. Center releases new public survey on stem cells
9. 2005 AIDS figures released by WHO and UNAIDS
10. Researchers release new variety of asparagus
11. DOE JGI releases IMG 1.5 with curated archaeal genomes
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... BROOKLYN, N.Y. , April 11, 2017 /PRNewswire-USNewswire/ ... identical fingerprints, but researchers at the New York ... University College of Engineering have found that partial ... fingerprint-based security systems used in mobile phones and ... previously thought. The vulnerability lies in ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... anticipated to expand at a CAGR of 25.76% during ... diseases is the primary factor for the growth of ... report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global ... product, technology, application, and geography. The stem cell market ...
(Date:3/30/2017)... Trends, opportunities and forecast in this market ... (fingerprint, AFIS, iris recognition, facial recognition, hand geometry, vein ... use industry (government and law enforcement, commercial and retail, ... others), and by region ( North America ... Pacific , and the Rest of the World) ...
Breaking Biology News(10 mins):
(Date:6/14/2017)... ... 2017 , ... The newest company to join the Science Center’s Port business ... human genes. ATGC, a spin out of the University of Michigan, will occupy lab ... genomics company. Its founders are among the first wave of researchers adopting into ...
(Date:6/14/2017)... , ... June 13, 2017 ... ... holistic approach for understanding the phenotype of an organism on a molecular ... throughput and complicated data processing remain major bottlenecks to biomarker discovery in ...
(Date:6/13/2017)... ... June 13, 2017 , ... Boyd ... The Copley Consulting Group to facilitate and deploy Infor’s CloudSuite Industrial (SyteLine) ... operations and strategic initiatives to increasing customer demands. , “The clients and ...
(Date:6/13/2017)... ... June 13, 2017 , ... ... keynote the American Chemical Society (ACS) Green Chemistry Institute’s 21st Annual ... EST. Dr. Feehery will address other business leaders, policy makers, educators, students and ...
Breaking Biology Technology: