You certainly do ask some tough questions. I don't have any answers for you, except that I have read that remicade, and other tnf-inhibitors, can cause lupus antibodies. I don't know anyone on the arthritis forum that this has happened to, but I seem to recall someone on the crohn's board that had to stop remicade for similar reasons. It's not common to develop these antibodies in reaction to remicade, so it would not be part of a regular blood panel with your rheumy. I know my rheumy probably would not test for it unless I started developing symptoms. Thank God for our general practictioners, yes? But I understand that with remicade-lupus, you don't necessarily have symptoms. I think ANA is a rather squirrely measurement; it tends to fluctuate, even among confirmed lupus patients, from negative to positive, and many lupians will tell you they test negative most of the time. My rheumy only tested me for it once, maybe twice, in the entire 4 years I've been seeing him. Your ANA could very well fall on its own, especially since you've stopped the remicade.
Hope you get good news,
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan