How to remove all leading and trailing colons (;) from a text?

I have multiple data which contains different quantities of leading and trailing colons ( as well as colons ( inside the alphanumeric text. I need to remove the leading and trailing colons ( from the text; not from the middle. Some of my data are as follows:

;;;;915531156;898520523;;;;;;;
28tgi11148;954419610;;;;;
542778022;8xtra02;824291991;;;;
;;769982422;550004568;640455606;458632786;;
;769982422;640455606;;;;

I would like to get the output as follows:

915531156;898520523
28tgi11148;954419610
542778022;8xtra02;824291991
769982422;550004568;640455606;458632786
769982422;640455606

Please advice.

Thanks in advance for all your co-operation.

Thank you very much shg for your help, it works perfectly. Have a wonderful Thanksgiving weekend.

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