Your situation is VERY similar to mine. I was spilling over 12 gr of protein into my urine a day. The treatment you described in your post was almost exactly what they wanted to do for me. I was sent to a nephrologist but once he started seeing me, he decided he wanted to try something else first. So, I'm on 10 mgs. of prednisone/day, along with the usual lupus drugs, but in addition, he wanted to try Cellcept which is indicated for people who have had a kidney transplant-it's to prevent the body from rejecting the kidney. At the time, he told me that there were some studies being done elsewhere which he had been following where they were trying this in Lupus nephritis. So, he wanted to try that on me. My nephrologist has a good reputation nationally, is kind of old so he's been around awhile.Anyway, so far-so good! My protein is down to just over 3grm per day. I take 1500 gr of Cellcept /day. They want to eventually get me off of the prednisone and get me on methatrexate in addition to the Cellcept. So, I'll probably start weaning off of pred soon once I start the methatrexate.
Over the past few months, I've seen quite a few articles about the good results they are having using this drug in lupus nephritis. Actually, my rheummy was a little concerned about it and took the inititive to contact another colleague of his at Johns Hopkins who told him that they were in fact getting excellent results with this.
Please ask your doc about it. If he's unfamiliar with the treatment and would like the name of my nephrologist to call him, I'd be happy to pass it along!