✦ LIBER ✦

Regulation of the distal retinal pigment of the dwarf crawfish, Cambarellus shufeldti

✍ Scribed by Fingerman, Milton

Publisher: Wiley (John Wiley & Sons)
Year: 1957
Tongue: English
Weight: 624 KB
Volume: 50
Category: Article
ISSN: 0095-9898
DOI: 10.1002/jcp.1030500302

No coin nor oath required. For personal study only.

✦ Synopsis

Distal retinal pigment of the arthropod compound eye has been termed the "iris pigment" because of its functional similarity to the iris of the vertebrate camera-type eye (Exner, '91). The early literature concerning the mechanics of migration of retinal pigments was reviewed by Parker ('32).

The experiments of Bennitt ('32) first suggested a hormonal control of retinal pigments in the prawn Palaemonetes vulgaris. He covered one eye and illuminated the other with the result that the retinal pi,gments of both eyes assumed a light adapted condition. Kleinholz ( '36) demonstrated a light adapting hormone in the eyestalk of Palaemortetes. Extracts prepared from eyestalks of light adapted pawns had twice the light adapting potency of eyestalk extracts from dark adapted prawns, suggestive of a role of the hormone in normal regulation of the distal retinal pigment. Eyestalks of the crawfishes Carnbarzts bartoni, Proccrmbarus clarki, and Orcolzectes lirnosus, also contained a factor that light adapted distal retinal pigment (Welsh, '39).

Sandeen and Brown ('52) showed that the position of the distal retinal pigment of Palaemonetes between the illuminations of 0.0005 and 50 ft. c. was a function of the intensity of

📜 SIMILAR VOLUMES

Twenty-four hour rhythm of distal retina

Twenty-four hour rhythm of distal retinal pigment migration in the dwarf crawfish

✍ Fingerman, Milton ;Lowe, Mildred E. 📂 Article 📅 1957 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 398 KB 👁 1 views

Persistent 24-hour rhythms of migration of retinal pigments in the compound eye have been reported for several crustaceans. Review of the literature disclosed that any one or any combination of the three pigments, distal, proximal, and reflecting, may exhibit a 24-hour rhythmicity (Brown, '44 ; Klei

Diurnal rhythm in the regulation of dist

Diurnal rhythm in the regulation of distal retinal pigment in Palaemonetes

✍ Webb, H. Marguerite ;Brown, Frank A. 📂 Article 📅 1953 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 953 KB

Light-and clarl;-nclal)tatioii of the cimtaceaii coiiipounil eye includes iiioveineiits of tlie retinal pigments. Although illuiiii~iation is 1mom-n to be an inipoi.taiit factor iii deterniiiiiiig the position of tlic i.ctiiia1 pigmetits, the nieclianisni wliicli controls pigiileiit inigratioii is i

Retinal mitosis is regulated by dopa, a

Retinal mitosis is regulated by dopa, a melanin precursor that may influence the time at which cells exit the cell cycle: Analysis of patterns of cell production in pigmented and albino retinae

✍ Ilia, Maria; Jeffery, Glen 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 329 KB 👁 2 views

A melanin-associated agent seems to play a role in regulating retinal development. When absent, diverse deficits occur. There is evidence that this agent regulates patterns of mitosis. This study examines retinal development in pigmented and albino rats to identify the regulating agent and its mode

N-(4-hydroxyphenyl)retinamide induces ap

N-(4-hydroxyphenyl)retinamide induces apoptosis in human retinal pigment epithelial cells: Retinoic acid receptors regulate apoptosis, reactive oxygen species generation, and the expression of heme oxygenase-1 and Gadd153

✍ William Samuel; R. Krishnan Kutty; Sahrudaya Nagineni; Camasamudram Vijayasarath 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 418 KB

## Abstract __N__‐(4‐hydroxyphenyl)retinamide (4HPR, fenretinide), a retinoic acid (RA) derivative and a potential cancer preventive agent, is known to exert its chemotherapeutic effects in cancer cells through induction of apoptosis. Earlier work from our laboratory has shown that relatively low c