Navigation Links
Cells die so defensive organs can live
Date:8/4/2011

Researchers demonstrate for the first time that programmed cell death - a process by which cells deliberately destroy themselves - is involved in mandibular regression in termites. And it appears this regression may be the price to pay for the formation of termites' defensive organs, according to Kouhei Toga and Kiyoto Maekawa from the University of Toyama, and Shinichi Yoda from the University of Tokyo, in Japan. Their findings have just been published online in Springer's journal Naturwissenschaften The Science of Nature.

As termites molt from workers, to presoldiers and finally soldiers under the effect of juvenile hormones, their body form and structure change, including the exaggeration and regression of certain organs. In particular, termite soldiers from the subfamily Nasutitermitinae possess a horn-like frontal tube (the nasus) which projects defensive chemicals, as well as regressed mouth parts (mandibles).

Juvenile hormones play a central role in caste differentiation - a two molt process for termite soldiers during which dramatic morphological changes occur. Until now, the mechanisms regulating mandibular regression in termites were unknown.

Toga and colleagues collected nests of N. takasagoensis termites from the Yaeyama Islands in Japan. They artificially induced presoldier differentiation by using a juvenile hormone, which works as an insect-growth regulator, and observed the shape and structure of the right mandibles throughout the differentiation process i.e. in minor workers, presoldiers and soldiers. The authors also looked for evidence of possible programmed cell death.

Their observations showed that mandibular teeth were lost during soldier differentiation. In particular, mandibular size reduced dramatically during differentiation, and substantial regression occurred during the presoldier molt. The most significant finding was evidence of programmed cell death in the regressing mandibles of presoldiers.

The authors conclude: "Our results prove that programmed cell death is responsible for the regression of mouth parts in termite soldiers, and hence social caste differentiation in this species. The exaggerated nasus and frontal glands develop as the mandibles regress. Programmed cell death could therefore be a regulatory mechanism of trade-off for the production of defensive organs."


'/>"/>

Contact: Joan Robinson
joan.robinson@springer.com
49-622-148-78130
Springer
Source:Eurekalert

Related biology news :

1. Jefferson scientists deliver toxic genes to effectively kill pancreatic cancer cells
2. NSF funds new Center for the Physics of Living Cells at Illinois
3. When cells go bad
4. The role of stem cells in renewing the cornea
5. Breast cancer cells recycle to escape death by hormonal therapy
6. Models of eel cells suggest electrifying possibilities
7. Scientists identify a molecule that coordinates the movement of cells
8. Form of Crohns disease traced to disabled gut cells
9. Cold Spring Harbor Laboratory scientists trace a novel way cells are disrupted in cancer
10. Researchers design artificial cells that could power medical implants
11. Stabilizing force for good communication between neurons and muscle cells found
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/1/2016)... Fla. , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ... and television personality, Joey Fatone . Las Vegas ... greet fans. --> Las Vegas , where ... --> The new video ad was filmed at the Consumer ... appeared at the Wocket booth to meet and greet fans. ...
(Date:1/25/2016)... , Jan. 25, 2016  Glencoe Software, the world-leading ... and publication industries, will provide the data management solution ... (NPSC). ... Phenotypic analysis measures the ... organisms, allowing comparisons between states such as health and ...
(Date:1/20/2016)... , Jan. 20, 2016 A market ... to directly benefit from the explosion in genomics knowledge. ... Howe Sound Research. A range of dynamic trends are ... - personalized medicine - pharmacogenomics - pathogen evolution ... with large markets - greater understanding of the role ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... , Feb. 10, 2016 NX Prenatal Inc., ... proprietary NeXosome® technology for early warning of adverse ... most recent study by Dr. Thomas McElrath ... Society for Maternal Fetal Medicine,s (SMFM) annual meeting held ... th , 2016.  The presentation reported initial positive ...
(Date:2/10/2016)... New York, and New York, New York (PRWEB) , ... ... ... Regeneron Pharmaceuticals Inc. (NASDAQ: REGN) today announced that it ... and develop new vaccines and immunotherapies for infectious diseases and cancer. ...
(Date:2/10/2016)... , Feb. 10, 2016  Allergan plc (NYSE: ... announced that Brent Saunders , Allergan,s CEO and ... a fireside chat session at the RBC Capital Markets ... p.m. ET at The New York Palace Hotel in ... will be webcast live and can be accessed on ...
(Date:2/10/2016)... Austin, Texas (PRWEB) , ... February 10, 2016 ... ... research centers across three states, announced today the promotion of two long-standing principal ... and Chief of Family Medicine, Clinical Research and Development. , Dr. Laurence Chu, ...
Breaking Biology Technology: