Publications by authors named "Dan Yun Chen"

Musculocontractural Ehlers-Danlos syndrome (mcEDS) is a rare heritable connective tissue disease with various symptoms. The diagnosis of mcEDS is difficult because of the large overlap of clinical symptoms between different EDS subtypes. We performed karyotype analysis, gene copy number variation detection, whole-exome sequencing, and Sanger sequencing to reveal the underlying genetic etiology of a fetus with structural abnormalities in feet and kidneys.

View Article and Find Full Text PDF

An effective transition-metal-free strategy was developed for the preparation of chromones from o-bromoaryl ynones and benzaldehyde oxime through sequential C-O bond formation. This cyclization reaction could well tolerate a wide range of functional groups, and the corresponding chromones were given in moderate to excellent yields. Mechanistically, benzaldehyde oxime as a hydroxide source and 1,3-diketone derivatives as reaction intermediates were involved in this transformation.

View Article and Find Full Text PDF

An effective and facile transition-metal-free method has been developed for the synthesis of β-ketophosphine oxides from alkynylphosphine oxides with benzaldehyde oxime as a hydroxide surrogate. The current methodology provides simple access to various β-ketophosphine oxides in moderate to excellent yields with a broad substrate scope.

View Article and Find Full Text PDF

Background: Thyrotoxic periodic paralysis (TPP) is a variant of periodic paralysis (PP) that occurs in patients with underlying mutations in genes for cation channels, if they develop thyrotoxicosis. It is disabling, and fatalities sometimes occur. Here, we present a patient with TPP who developed hypokalemic paralysis that was probably aggravated by the administration of a carbohydrate, probably contributing to, if not causing, a fatal outcome.

View Article and Find Full Text PDF

Background: In China, use of radioiodine therapy is problematic because of the need for lifelong levothyroxine substitution. Our aim was to find an optimum dosing strategy for (131)I treatment of hyperthyroidism due to Graves' disease (GD). We attempted to achieve euthyroidism to avoid long-term levothyroxine treatment.

View Article and Find Full Text PDF

Objective: In China the therapeutic options to treat hyperthyroidism comprise antithyroid drugs (ATDs), radioiodine (131I) therapy and surgery. Physicians in China avoid the risk of hypothyroidism as a consequence of either treatment because patients from rural districts cannot easily comply with long-term medication. Therefore, we prospectively assessed the efficacy and safety of 131I versus ATDs.

View Article and Find Full Text PDF

Objective: To comprehensively evaluate the treatment of Graves' disease in children with (131)I and antithyroid drugs (ATD) and to quantitatively assess the advantages and disadvantages of them.

Methods: The authors examined the outcome of (131)I and ATD treatment in children with Graves' disease at the Hospital of Dongshan District in Guangzhou during the period 1997 to 2002. Each of the 2 groups of patients consisted of 40 patients ranging in age from 8 to 14 years (mean 10.

View Article and Find Full Text PDF