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Cnidocyte mechanoreceptors are tuned to the movements of swimming prey by chemoreceptors.
Cnidocytes in fishing tentacles of a sea anemone are now found to discharge nematocysts preferentially into targets vibrating at 30, 55, and 65 to 75 hertz, frequencies that correspond to the movements of swimming prey. Expand
The Biology of Nematocysts
The biology of nematocysts is studied in detail in the context of drug chemoreception and drug reprograming. Expand
The role of nitric oxide in skin blood flow increases due to vibration in healthy adults and adults with type 2 diabetes.
- Colleen Maloney-Hinds, J. Petrofsky, G. Zimmerman, D. A. Hessinger
- Diabetes technology & therapeutics
- 8 January 2009
These findings suggest that subjects with diabetes exhibit a lower skin blood flow and lower NO response to externally applied vibration than matched normal subjects. Expand
Efferent Mechanisms of Discharging Cnidae: I. Measurements of Intrinsic Adherence of Cnidae Discharged From Tentacles of the Sea Anemone, Aiptasia pallida.
The authors' measurements indicate that penetrable prey are primarily secured to the tentacle by discharged mastigophores and by the inherent stickiness of the Tentacle surface. Expand
Control of Cnida Discharge: I. Evidence for Two Classes of Chemoreceptor
Cnidocytes are sensitized to discharge their cnidae in response to mechanical stimuli originating from the prey, and it is demonstrated that these chemosensitizers act through at least two distinct classes of chemoreceptors. Expand
Cnidocytes and adjacent supporting cells form receptor-effector complexes in anemone tentacles.
The discharge of nematocysts by enidocytes may be regulated by the number of receptor-ligand complexes at the surface of the adjacent supporting cells, and it is concluded that enidocyte and supporting cells constitute receptor-effector complexes. Expand
Receptors for N-acetylated sugars may stimulate adenylate cyclase to sensitize and tune mechanoreceptors involved in triggering nematocyst discharge.
Together, these results implicate cAMP as the second messenger for activated supporting cell chemoreceptors involved in sensitizing the CSMs and tuning the VSMs to lower frequencies. Expand
CONTROL OF DISCHARGE: FACTORS AFFECTING DISCHARGE OF CNIDAE
Purification and partial characterization of the phospholipase A2 and co-lytic factor from sea anemone (Aiptasia pallida) nematocyst venom.
- Gary R. Grotendorst, D. A. Hessinger
- Biology, Medicine
- Toxicon : official journal of the International…
- 1 December 1999
Functional nematocysts of one specific morphological class, the penetrant microbasic mastigophores, were isolated from the sea anemone, Aiptasia pallida. These nematocysts contain a multicomponent… Expand