Is it right to use 'X is a new research topic of interest to our lab' to indicate that the lab has not done research on 'X'? Is it right to use 'X is a new research topic of interest to our lab' to say that the lab has not done research on X before?

I want to convey:

1.The lab only focused on  research topic 'Y'(e.g. proteins) in the past. In the future, 'Y' will still be the focus, even though 'X' will be the secondary focus.

2.The lab lacked established biological experimental conditions for conducting research on topic 'X' (e.g. miRNA) two years ago, since topic X belongs to different field. I was the first student to conduct research on topic X.

I am a student, not the PI. I want to describe the experimental conditions when I began the project in PS for PhD application. I started from scratch and encountered many difficulties.

(I hope my edits would make the problem more clear, thank you! )

Besides, Is there a more polite way to say 'our lab'?  I mean the lab I belong to.
I have angst about writing this answer. When you say our lab, it potentially sounds like you are speaking for the lab in an official context and taking an ownership stake in the lab. Depending on your role, I am not sure you can talk about the lab as being yours. I am also not sure you cannot, and hence the angst.

As a PI of a lab, I have research interests that the lab has never followed through on due to a variety of reasons including a lack of funding and expertise. I would be a little upset if a student/post doc implied the lab was not interested in a topic just because the lab didn't have the expertise or equipment to do any research on the topic. Similarly, I would be a little upset if a student post doc implied that their personal interest automatically becomes an interest of the lab.