Microbead Implantation in the Zebrafish Embryo

The overall goal of the following experiment is to use microbead implantation to introduce alterations in the local tissue environment at specific spatial and temporal points during zebrafish embryogenesis. This is achieved by first preparing a bead implantation tray to facilitate the precise handling and implantation of the micro beads. As a second step, the zebrafish eggs are incubated to the desired stage of development.

The micro beads are then prepared in the appropriate experimental solutions and carefully transferred into the desired location within the embryo. Ultimately, microbead implantation can be performed without the disruption of normal zebrafish development, allowing assessment of the effects of the molecules of interest on zebrafish embryogenesis. This method can help answer key questions, the developmental biology field, such as how do different molecules affect the process of organogenesis?

Generally, Individuals new to this method will struggle as it takes practice to become skilled at handling the microbeads. To prepare the microbead implantation tray first heat freshly prepared 2%aro solution for 90 seconds. In a 250 milliliter erlenmeyer flask swirling the flask every 30 seconds to prevent the gel from bubbling over.

Next place the lid of a 60 by 15 millimeter Petri dish into a 150 by 15 millimeter dish with the interior of the lid facing upward. Then anchoring the lid of the smaller Petri dish with an index finger. Pour the hot aros gel into the bigger dish.

Allow a thin layer of agros to form below the smaller lid to prevent the formation of condensation and to make the beads easier to see under the microscope as the agros cools. But before its solidifies slowly angle a well mold into the top of the gel to allow easier placement of the embryos. When the gel has solidified, use a micros spatula to carefully remove the well mold.

Then add E three solution to the dish and store it at four degrees Celsius. To harvest the zebrafish embryos, fill a mating chamber with system water. Then place a divider in the middle of the chamber and add adult male and female zebrafish into the appropriate sides of the chamber.

The next morning, use a fine wire mesh strainer to collect the fertilized eggs. Turn the strainer upside down inside a clean 10 centimeter Petri dish, and rinse the mesh with a fine stream of E three until there are no eggs left in the strainer, and there is approximately 25 milliliters of E three solution in the dish. Then divide the eggs among several dishes at 50 to 60 eggs per dish to avoid overcrowding and incubate the eggs in E three solution at 28.5 degrees Celsius before implanting the microbeads, incubate them in the appropriate volume of the test, molecule of interest or control vehicle for the appropriate period of time.

Then when the embryos have reached the desired developmental time point, use fine forceps to remove their kons and incubate the zebrafish in filtered ringer solution. Supplemented with antibiotics for 10 minutes while the embryos are acclimating. Transfer the micro beads into the previously prepared micro bead plate, nestled within the implantation tray, and rinse the beads and ringer solution for 10 minutes.

Within 50 minutes of washing the beads array one embryo at a time within the well of the implantation tray, such that the area for microbead implantation is accessible. Using a tungsten needle, make a small incision on the embryo, then depress the bulb of a micro capillary transfer pipette to gently pull a microbead into the capillary column and release the pressure to deliver the micro bead into the implantation tray to make the micro bead easier to handle. Gently push the bead to sink it into the ringer solution within the mold.

Then using the microneedle, move the micro bead onto the embryo and into the incision. Finally, use the whisker tool to move the microbead away from the incision site so that the bead will not be expelled as it heals. The success of the microbead implantation can then be immediately gauged through the stereo microscope as the bead will remain stably positioned within the tissue.

In this experiment, single microbeads of two different sizes rinsed with ringer solution alone were implanted into zebrafish embryos at the tail bud stage, or at later time points during some myogenesis to ensure that the bead location has not shifted over the duration of the experiment due to endogenous tissue.Morphogenesis. The embryo samples can be visualized by lifetime course photography or checked at periodic intervals as the images demonstrate microbead implantation. In the absence of any conjugated, small molecules can be achieved without gross morphological effects during the normal development that the SPR fish embryo you.

Following this procedure, other methods like Whole Mount Institute hyper can be performed to study how the Microbead affects gene expression. Overall, understanding the position of the bead over time is critical in interpretation of the results, such as evaluating the effects of a small molecule on a target tissue or developmental process.