Mitotic spindle studied using picosecond laser scissors

N. M. Baker; E. L. Botvinick; Linda Shi; M. B. Berns; George Wu

doi:10.1117/12.680965

11 September 2006 Mitotic spindle studied using picosecond laser scissors

N. M. Baker, E. L. Botvinick, Linda Shi, M. B. Berns, George Wu

Proceedings Volume 6326, Optical Trapping and Optical Micromanipulation III; 63262C (2006) https://doi.org/10.1117/12.680965
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

In previous studies we have shown that the second harmonic 532 nm, from a picosecond frequency doubled Nd:YAG laser, can cleanly and selectively disrupt spindle fiber microtubules in live cells (Botvinick et al 2004, Biophys. J. 87:4303-4212). In the present study we have ablated different locations and amounts of the metaphase mitotic spindle, and followed the cells in order to observe the fate of the irradiated spindle and the ability of the cell to continue through mitosis. Cells of the rat kangaroo line (PTK2) were stably transfected by ECFP-tubulin and, using fluorescent microscopy and the automated RoboLase microscope, (Botvinick and Berns, 2005, Micros. Res. Tech. 68:65-74) brightly fluorescent individual cells in metaphase were irradiated with 0.2447 nJ/micropulse corresponding to an irradiance of 1.4496*10^7 J/(ps*cm^2) . Upon irradiation the exposed part of the mitotic spindle immediately lost fluorescence and the following events were observed in the cells over time: (1) immediate contraction of the spindle pole towards the cut, (2) recovery of connection between pole and cut microtubule, (3) completion of mitosis. This system should be very useful in studying internal cellular dynamics of the mitotic spindle.

Citation Download Citation

N. M. Baker, E. L. Botvinick, Linda Shi, M. B. Berns, and George Wu "Mitotic spindle studied using picosecond laser scissors", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262C (11 September 2006); https://doi.org/10.1117/12.680965

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available