Melodic Minor Chord Progressions

Hey guys...I'm trying to brush up on my chord progression theory. I don't play jazz songs but was wondering if any jazz players on the UU could answer a question for me?

I know the melodic minor scale is basically the same as a natural minor scale, but with a raised 6th and 7th note (playing ascending). Then when playing it descending you play the natural minor scale (no raised 6th or 7th notes). But when playing a melodic minor chord progress I get confused.

Is this rule the same for playing a melodic minor chord progression (raising the 6th and 7th chord ascending, and playing them normally descending)?

Thanks guys.