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Mitochondrial neurogastrointestinal encephalomyopathy: an autosomal recessive disorder due to thymidine phosphorylase mutations.

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Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is an autosomal recessive disorder defined clinically by severe gastrointestinal dysmotility; cachexia; ptosis, ophthalmoparesis, or both; peripheral neuropathy; leukoencephalopathy; and mitochondrial abnormalities. The disease is caused

Human uridine phosphorylase-1 inhibitors: a new approach to ameliorate 5-fluorouracil-induced intestinal mucositis.

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OBJECTIVE 5-fluorouracil (5-FU) has been broadly used to treat solid tumors for more than 50 years. One of the major side effects of fluoropyrimidines therapy is oral and intestinal mucositis. Human uridine phosphorylase (hUP) inhibitors have been suggested as modulators of 5-FU toxicity. Therefore,

Significance of thymidine phosphorylase in metronomic chemotherapy using CPT-11 and doxifluridine for advanced colorectal carcinoma.

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BACKGROUND A phase II study was designed to evaluate the efficacy, safety and predictors for response of metronomic chemotherapy using weekly low-dosage CPT-11 and doxifluridine (5'-DFUR) in 45 patients with metastatic colorectal cancer. METHODS Forty mg/m2 of CPT-11 was administered for 3

Common mutation in the PHKA2 gene with variable phenotype in patients with liver phosphorylase b kinase deficiency.

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We found that the missense mutation p.Pro1205Leu in the PHKA2 gene is a common cause of hepatic phosphorylase-kinase deficiency in Dutch patients, suggesting a founder-effect. Most patients presented with isolated growth delay and diarrhea, prior to the occurrence of hepatomegaly, delaying

Final results of a multicenter phase II study of the purine nucleoside phosphorylase (PNP) inhibitor forodesine in patients with advanced cutaneous T-cell lymphomas (CTCL) (Mycosis fungoides and Sézary syndrome).

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BACKGROUND Forodesine is a potent inhibitor of purine nucleoside phosphorylase (PNP) that leads to intracellular accumulation of deoxyguanosine triphosphate (dGTP) in T and B cells, resulting in apoptosis. Forodesine has demonstrated impressive antitumor activity in early phase clinical trials in

Final results of a multicenter phase II study of the purine nucleoside phosphorylase (PNP) inhibitor forodesine in patients with advanced cutaneous t-cell lymphomas (CTCL) (Mycosis fungoides and Sézary syndrome).

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Forodesine is a potent inhibitor of purine nucleoside phosphorylase (PNP) that leads to intracellular accumulation of deoxyguanosine triphosphate (dGTP) in T and B cells, resulting in apoptosis. Forodesine has demonstrated impressive antitumor activity in early phase clinical trials in

Use of oral uridine as a substitute for parenteral uridine rescue of 5-fluorouracil therapy, with and without the uridine phosphorylase inhibitor 5-benzylacyclouridine.

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Initial clinical trials have demonstrated that uridine (Urd) rescue given i.v. over at least 3 days can ameliorate 5-fluorouracil (FUra) toxicity; to avoid Urd-induced phlebitis in the peripheral veins of patients, a central vein is used. The latter necessity, along with the need for 3 days of i.v.

A novel thymidine phosphorylase mutation in a Chinese MNGIE patient.

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Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE) is an autosomal recessive disorder associated with mitochondrial alterations. MNGIE is characterized by severe gastrointestinal dysmotility, cachexia, ophthalmoplegia, ptosis, peripheral neuropathy, and leukoencephalopathy. The condition

Diagnosis of mitochondrial neurogastrointestinal encephalopathy disease in gastrointestinal biopsies.

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A 14-year-old boy with mitochondrial neurogastrointestinal encephalopathy (MNGIE) disease had a lifelong history of failure to thrive and gastrointestinal symptoms including vomiting, pain, and diarrhea, leading to progressive cachexia. At the age of 9 years, after an extensive workup, the diagnosis

Oral doxifluridine in elderly patients with metastatic colorectal cancer: a multicenter phase II study.

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BACKGROUND Cancer chemotherapy in elderly patients is an important and under-researched area. Doxifluridine is a fluoropyrimidine derivative and is activated to 5-fluorouracil by uridine phosphorylase, which is more highly expressed in malignant cells. Because of the high bioavailability and low

A phase II study of preoperative capecitabine in women with operable hormone receptor positive breast cancer.

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Conventional preoperative chemotherapy regimens have only limited efficacy in hormone receptor positive (HR+) breast cancer and new approaches are needed. We hypothesized that capecitabine, which is effective in metastatic breast cancer, may be an active preoperative treatment for HR+ breast cancer.

Phase I study of capecitabine with concomitant radiotherapy for patients with locally advanced pancreatic cancer: expression analysis of genes related to outcome.

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OBJECTIVE To establish the feasibility of capecitabine with concurrent radiotherapy (XRT) in patients with locally advanced (LA) pancreatic cancer and evaluate the effect of XRT on thymidine phosphorylase (TP), dihydropyrimidine dehydrogenase (DPD), and tumor necrosis factor-alpha

Capecitabine (Xeloda): from the laboratory to the patient's home.

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Attempts at improving the efficacy of 5-fluorouracil (5-FU) by protracted continuous infusion and/or biochemical modulation have been hindered by the need for indwelling central venous catheters and their associated toxicity. Capecitabine, an oral fluoropyrimidine carbamate, has been rationally

Efficacy and tolerability of capecitabine with weekly paclitaxel for patients with metastatic breast cancer: a phase II report of the SAKK.

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BACKGROUND Paclitaxel and capecitabine have proven activity in the treatment of metastatic breast cancer (MBC). Paclitaxel increases the expression of thymidine phosphorylase, the enzyme that activates capecitabine. The purpose of this study was to evaluate the efficacy and tolerability of

Standard versus continuous administration of capecitabine in metastatic breast cancer (GEICAM/2009-05): a randomized, noninferiority phase II trial with a pharmacogenetic analysis.

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BACKGROUND The approved capecitabine regimen as monotherapy in metastatic breast cancer (MBC) is 1,250 mg/m(2) twice daily for 2 weeks on and 1 week off (Cint). Dose modifications are often required because of severe hand-foot syndrome (HFS). We tested a continuous regimen with a lower daily dose

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