PMID: 6170962Jan 1, 1981Paper

Development of enkephalinergic neurons in the gut of the chick

Peptides
M L EpsteinJ L Dahl

Abstract

The content and distribution of Met-enkephalin immunoreactivity in the developing chick gut was studied by radioimmunoassay and immunocytochemistry. Met-enkephalin was detected by radioimmunoassay in the duodenum of the 5-day chick embryo. The concentration in this region increased 4-fold by 13 days of incubation and declined thereafter to the levels found in the 4-week chicken. The concentration of enkephalin in the midgut increased about 2-fold between 9 and 13 days of incubation and remained constant until hatching. In the 7-day duodenum, metenkephalin immunoreactivity was found in a network of darkly stained nodes (accumulations of ganglion cells) faintly stained internodal nerve bundles; this network of immunoreactivity was localized to the myenteric plexus. By 9 days of incubation, the network was more extensive and the intensity of staining was increased. At 13 days of incubation, varicosities were found in the region of the ganglion cells and in internodal nerve bundles. At this time, immunoreactivity was clearly visualized in the submucosal plexus. In the newly hatched chicken, met-enkephalin was found in nerves within the circular smooth muscle, as well as the myenteric and submucosal plexuses. The early appearance of...Continue Reading

References

May 18, 1979·Brain Research·I LindbergJ L Dahl
Feb 15, 1979·Cell and Tissue Research·F SundlerO B Schaffalitzky de Muckadell
Apr 6, 1979·Brain Research·J T Williams, R A North
Jul 20, 1979·Naunyn-Schmiedeberg's Archives of Pharmacology·P Holzer, F Lembeck
Jan 1, 1981·Annual Review of Neuroscience·M D Gershon
Jan 1, 1980·Neuroscience·J B Furness, M Costa
Jan 1, 1981·Cell and Tissue Research·G MalmforsF Sundler
Jun 1, 1980·Developmental Biology·M L EpsteinM D Gershon
Feb 1, 1981·Journal of Neurochemistry·I Lindberg, J L Dahl
Oct 1, 1954·The Journal of Comparative Neurology·C L YNTEMA, W S HAMMOND
Jan 1, 1951·Journal of Morphology·V HAMBURGER, H L HAMILTON

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.