RESUMEN
Cystinuria is an incompletely dominant disorder characterized by defective urinary cystine reabsorption that results in the formation of cystine-based urinary stones. Current treatment options are limited in their effectiveness at preventing stone recurrence and are often poorly tolerated. We report that the nutritional supplement α-lipoic acid inhibits cystine stone formation in the Slc3a1-/- mouse model of cystinuria by increasing the solubility of urinary cystine. These findings identify a novel therapeutic strategy for the clinical treatment of cystinuria.
Asunto(s)
Cistina/efectos de los fármacos , Cistinuria/metabolismo , Riñón/efectos de los fármacos , Ácido Tióctico/farmacología , Urolitiasis/metabolismo , Sistemas de Transporte de Aminoácidos Básicos/genética , Sistemas de Transporte de Aminoácidos Neutros/genética , Animales , Cistina/metabolismo , Modelos Animales de Enfermedad , Riñón/diagnóstico por imagen , Riñón/metabolismo , Ratones , Ratones Noqueados , Solubilidad/efectos de los fármacos , Urolitiasis/diagnóstico por imagen , Microtomografía por Rayos XRESUMEN
CONTEXT: Chronic, nonspecific back pain is a ubiquitous problem that has frustrated both physicians and patients. Some have suggested that it is time for a "paradigm shift" in treating it. One of them is John Sarno, MD, of New York University's Rusk Institute of Rehabilitation, who has argued for this in 4 books and several journal publications. We believe that a mind-body approach is more effective and involves much less risk and expense than conventional approaches in appropriately diagnosed cases. OBJECTIVE: To determine if a mind-body treatment program addressing a presumed psychological etiology of persistent back pain merits further research. DESIGN: Case series outcome study. SETTING: Single physician's office in metropolitan Los Angeles. PATIENTS: Fifty-one patients with chronic back pain, diagnosed with tension myositis syndrome, a diagnosis for "functional" back pain and treated in the principal investigator's office in 2002 and 2003. INTERVENTIONS: A program of office visits, written educational materials, a structured workbook (guided journal), educational audio CDs, and, in some cases, individual psychotherapy. MAIN OUTCOME MEASURES: Pain intensity (visual analog scale scores), quality of life (RAND SF-12), medication usage, and activity level (questionnaires). Follow-up was at least 3 to 12 months after treatment. RESULTS: Mean VAS scores decreased 52% for "average" pain (P < .0001), 35% for "worst" pain (P < .0001), and 65% for "least" pain (P < .0001). SF-12 Physical Health scores rose >9 units (P = .005). Medication usage decreased (P = .0008). Activity levels increased (P =.03). Participants aged >47 years and in pain for >3 years benefited most.