Guided outgrowth of leech neurons in culture.

نویسندگان

  • P Fromherz
  • H Schaden
  • T Vetter
چکیده

Sensory neurons of Hirudo medicinalis were cultivated on patterns of extracellular matrix (ECM) protein which were prepared by UV irradiation using copper grid masks. The relation of the patterns and of the outgrowth of neurites was observed by scanning electronmicroscopy after gold decoration. The neurites were guided by narrow (10 microM) lanes of ECM protein. Branching of neurites was induced by branched lanes. Bent neurites were pulled off bent lanes at some distance behind the growth cone such that their length was reduced. Regularly spaced sites of adhesion became visible which remained connected to the neurites by extended filaments.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Steps in the formation of neurites and synapses studied in cultured leech neurons.

Leech neurons in culture have provided novel insights into the steps in the formation of neurite outgrowth patterns, target recognition and synapse formation. Identified adult neurons from the central nervous system of the leech can be removed individually and plated in culture under well-controlled conditions, where they retain their characteristic physiological properties, grow neurites and f...

متن کامل

Attachment to an endogenous laminin-like protein initiates sprouting by leech neurons

Leech neurons in culture sprout rapidly when attached to extracts from connective tissue surrounding the nervous system. Laminin-like molecules that promote sprouting have now been isolated from this extracellular matrix. Two mAbs have been prepared that react on immunoblots with a approximately equal to 220- and a approximately equal to 340-kD polypeptide, respectively. These antibodies have b...

متن کامل

Effects of different culture media on optimization of primary neuronal cell culture for in vitro models assay

Background: In vitro model studies are becoming increasingly popular for experimental research designs. They include isolation and expansion of cells of a particular tissue, such as the nervous tissue which contributes to understanding the underlying mechanisms in many pathologies. It enables  the scrutinization of intracellular signaling pathways responsible for cell death. OBJECTIVES: In the ...

متن کامل

Intrinsic and Extrinsic Factors influencing Properties Patterns of ldentif ied Leech Neurons in Culture Growth

An analysis has been made of intrinsic mechanisms influencing growth patterns of 2 identified leech interneurons in tissue culture. These small cells (known as DL and VL) display unusual arborirations in the ganglion. The distinctive branching patterns resemble the letter “T” for VL and the letter “Y” for DL. DL and VL cells contain serotonin and can be identified in situ with Neutral red. 1. D...

متن کامل

Axon outgrowth along segmental nerves in the leech. II. Identification of actual guidance cells.

Some peripheral neurons, previously identified as candidate guidance cells for axonal outgrowth along the segmental nerves in embryos of the glossiphoniid leech Helobdella triserialis, were photoablated by laser illumination to ascertain whether their presence is necessary for generation of the normal axonal growth pattern. These experiments showed that focal photoablation of peripheral neurons...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Neuroscience letters

دوره 129 1  شماره 

صفحات  -

تاریخ انتشار 1991