WordNet

electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons (同)electron lens
a transparent optical device used to converge or diverge transmitted light and to form images (同)lense, lens system
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina (同)crystalline_lens, lens of the eye
(metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen"
genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils (同)genus Lens

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/04/21 19:36:30」(JST)

Lens placode

Transverse section of head of chick embryo of fifty-two hours’ incubation.
Latin	placoda lentis
Precursor	surface ectoderm
Gives rise to	lens
Code	TE E5.16.3.1.0.0.13

The Lens placode is a thickened portion of ectoderm which serves as the precursor to the lens.

SOX2 and Pou2f1 are involved in its development.^[1]

^ Donner AL, Episkopou V, Maas RL (2007). "Sox2 and Pou2f1 interact to control lens and olfactory placode development". Dev. Biol. 303 (2): 784–99. doi:10.1016/j.ydbio.2006.10.047. PMID 17140559.

eye-008 — Embryo Images at University of North Carolina
http://cwx.prenhall.com/bookbind/pubbooks/martini10/chapter18/custom3/deluxe-content.html
http://isc.temple.edu/neuroanatomy/lab/embryo_new/eye/2/

This article incorporates text from a public domain edition of Gray's Anatomy.

This anatomy article is a stub. You can help Wikipedia by expanding it.

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Lens placode planar cell polarity is dependent on Cdc42-mediated junctional contraction inhibition.

Muccioli M1, Qaisi D1, Herman K1, Plageman TF Jr1.
Developmental biology.Dev Biol.2016 Feb 20. pii: S0012-1606(15)30375-4. doi: 10.1016/j.ydbio.2016.02.016. [Epub ahead of print]
Development of the ocular lens commences with the formation of the lens placode, an epithelial structure that thickens and subsequently bends inward in a process called invagination. Invagination is observed during the development of many embryonic structures, but the spectrum of morphogenetic event
PMID 26902112

FGFR and PTEN signaling interact during lens development to regulate cell survival.

Chaffee BR1, Hoang TV1, Leonard MR1, Bruney DG1, Wagner BD1, Dowd JR1, Leone G2, Ostrowski MC2, Robinson ML3.
Developmental biology.Dev Biol.2016 Feb 15;410(2):150-63. doi: 10.1016/j.ydbio.2015.12.027. Epub 2016 Jan 5.
Lens epithelial cells express many receptor tyrosine kinases (RTKs) that stimulate PI3K-AKT and RAS-RAF-MEK-ERK intracellular signaling pathways. These pathways ultimately activate the phosphorylation of key cellular transcription factors and other proteins that control proliferation, survival, meta
PMID 26764128

Plautz CZ1, Williams HC2, Grainger RM3.
Journal of visualized experiments : JoVE.J Vis Exp.2016 Jan 30;(107). doi: 10.3791/53518.
Identification of genes responsible for embryonic induction poses a number of challenges; to name a few, secreted molecules of interest may be low in abundance, may not be secreted but tethered to the signaling cell(s), or may require the presence of binding partners or upstream regulatory molecules
PMID 26862700

Localization of 3-phosphoglycerate dehydrogenase, an enzyme involved in de novo L-serine biosynthesis, in the peripheral nervous system and non-neuronal tissues of mice