VTD Followed By MPT Maintenance As a First Line Treatment For The Patients With MM Who Are Non-Transplant Candidates

Inclusion Criteria: * Newly diagnosed patients with overt multiple myeloma who are not candidates for HDT/SCT because of old age (\> 65) or presence of comorbid conditions likely to have a negative impact on tolerability of HDT/SCT. Sponsors review this conditions and approval is required. * Presence of measurable disease : serum M-protein \> 1g/dL or urine M- protein \> 400mg/day * Performance status £ ECOG 2 * Expected survival ³ 6 months * Pretreatment clinical laboratory values meeting the following criteria within 14 days before enrollment platelet ≥ 100 x 109/L hemoglobin ≥ 8 g/dL (≥ 4.96 mol/L) Prior RBC transfusion or recombinant human erythropoietin use is allowed) absolute neutrophil count (ANC) ≥ 1.0 x 109/L aspartate aminotransferase (AST) ≤ 2.5 times the upper limit of normal alanine aminotransferase (ALT) ≤ 2.5 times the upper limit of normal total bilirubin ≤ 1.5 times the upper limit of normal serum creatinine ≤ 3mg/dL corrected serum calcium \<14 mg/dL (\<3.5 mmol/L) * Subjects (or their legally acceptable representatives) must have signed an informed consent document indicating that they understand the purpose of and procedures required for the study and are willing to participate in the study. Exclusion Criteria: * Smoldering or indolent myeloma * History of allergic reaction attributable to compounds containing boron or mannitol * Known hypersensitivity to thalidomide or dexamethasone * Peripheral neuropathy or neuropathic pain Grade 2 or higher as defined by NCI CTCAE version 3 * Uncontrolled or severe cardiovascular disease, including MI within 6 months of enrolment, New York Heart Association (NYHA) Class III or IV heart failure, uncontrolled angina, clinically significant pericardial disease, or cardiac amyloidosis, cardiac ejection fraction \<0.5 : Severe conduction disorder : Hypotension (sitting systolic BP ≤ 100 mmHg and/or sitting diastolic BP ≤ 60 mmHg * Sepsis * Pregnancy or breastfeeding * Uncontrolled Diabetes Mellitus * Recurrent DVT or pulmonary embolism * Active ulcers detected by gastroscopy * Serious medical or psychiatric illness likely to interfere with participation in this clinical study. * Receipt of extensive radiation therapy within 4 weeks