A chiral photoswitch based on enantiospecific interconversion between binaphthyl and helicenoid skeletons.

A novel chiral photoswitch composed of a binaphthyl unit and a hexafluorocyclopentene ring has been synthesized. This chiral photoswitch exhibited thermally reversible photochromism between the binaphthyl and helicenoid forms based on 6π-electrocyclization. The helicity of the binaphthyl moiety was reversed upon stereospecific photocyclization and reverted back during the thermal ring opening.

Impact of glycemic control with sitagliptin on the 2-year progression of arterial stiffness: a sub-analysis of the PROLOGUE study.

BACKGROUND: No conclusive evidence has been obtained yet on the significance of the effects of dipeptidyl peptidase-4 (DPP-4 inhibitor) treatment on the arterial stiffness in clinical settings. In addition, the effects of good glycemic control on the arterial stiffness have also not been clarified yet. As a sub-analysis of the PROLOGUE study, we examined the effect of a DPP-4 inhibitor (sitagliptin) on the 2-year progression of the arterial stiffness and also to determine the effect of good glycemic control on the rate of progression of the arterial stiffness. METHODS: In the PROLOGUE study, the study participants were either allocated to add-on sitagliptin treatment or to continued treatment with conventional anti-diabetic agents. Among the 463 participants of the PROLOGUE study, we succeeded in measuring the brachial-ankle pulse wave velocity (baPWV) at least two times during the 2-year study period in 96 subjects. RESULTS: The changes in the baPWV during the study period were similar between the both groups (i.e., with/without staglipitin), overall. On the other hand, when the study subjects were divided into two groups according to the glycemic control status during the study period {good glycemic control group (GC) = hemoglobin (Hb)A1c <7.0 at both 12 and 24 months after the treatment randomization; poor glycemic control group (PC) = HbA1c ≥7.0 at either 12 months, 24 months, or both}, the 2-year increase of the baPWV was marginally significantly larger in the PC group (144 ± 235 cm/s) as compared to that the GC group (-10 ± 282 cm/s) (p = 0.036). CONCLUSION: While the present study could not confirm the beneficial effect of sitagliptin per se on the arterial stiffness, the results suggested that good glycemic control appears to be beneficial for delaying the annual progression of the arterial stiffness. Trial registration University Hospital Medical Information Network Clinical Trials Registry UMIN000004490.

[Mobilization of the Liver for Farther Incision of the Diaphragm in Transdiaphragmatic Re-do Coronary Artery Bypass Grafting].

Re-do coronary artery bypass grafting to the right coronary artery via the diaphragm is useful, especially when re-sternotomy may injure a patent internal thoracic artery graft under the sternum. When the target vessel is located on the posterior wall of the heart, however, anastomosis becomes difficult. In our case, we mobilized the liver from the diaphragm and divided the diaphragm more posteriorly. The gastroepiploic artery was successfully anastomosed to the target vessel.

Effects of oral propranolol on a juxtapapillary capillary hemangioma: a single-subject pilot study.

Oral propranolol hydrochloride has been proven effective in treating infantile hemangiomas, and its potential efficacy in choroidal hemangiomas has been suggested. A 57-year-old woman with a juxtapapillary capillary hemangioma was treated with oral propranolol at Nagoya Medical Center in Japan in 2012. Although the condition of this patient partially improved, oral propranolol did not appear to have a critical therapeutic effect. To the authors' knowledge, this is the first pilot study to describe a case in which oral propranolol was used as a therapeutic approach for a retinal hemangioma.

Effects of oral propranolol on circumscribed choroidal hemangioma: a pilot study.

IMPORTANCE: Oral propranolol hydrochloride treatment has been proven effective for infantile hemangiomas. To our knowledge, this study is the first to report multiple cases in which oral propranolol therapy was used for patients with circumscribed choroidal hemangioma. OBSERVATIONS: Five patients with circumscribed choroidal hemangioma were treated at Nagoya Medical Center, Nagoya, Japan, from 2011 to 2012. Oral propranolol hydrochloride was initiated at 10 mg 3 times a day and was increased monthly by 30 mg/d until the desired effects were observed. The mean (SD) height of the tumor (based on the B-mode at the end of the study) was 84.5% (13.6%) relative to the initial height. Similarly, the mean (SD) tumor area (based on indocyanine green angiography) was 94.2% (6.0%), the mean (SD) visual acuity was 0.04 (0.21) logMAR, and the mean (SD) Humphrey visual field mean deviation was -0.98 (1.1) dB. In 3 patients with macular edema, the mean (SD) foveal thickness (measured with optical coherence tomography) was 114.0% (13.9%). CONCLUSIONS AND RELEVANCE: Although oral propranolol therapy may partially improve the condition of patients with circumscribed choroidal hemangioma, it does not seem to have a critical therapeutic effect, at least at blood concentrations lower than 50 to 100 ng/mL. TRIAL REGISTRATION: umin.ac.jp/ctr Identifier: UMIN000006623.

Simultaneous stent obstruction of triple vessels with very late stent thrombosis after implantation of sirolimus-eluting stents.

A 70-year-old man presented to the emergency department at our hospital with chest pain, 24 months after sirolimus-eluting stents (SESs) were implanted in the proximal left anterior descending coronary artery (LAD), middle right coronary artery (RCA), and middle left circumflex artery (LCX), respectively. Electrocardiogram showed complete right bundle branch block and ST-segment elevation in leads II, III, and aVF. He suddenly went to ventricular tachycardia, followed by ventricular fibrillation. Administration of electrical shock led to cardiac arrest. Immediately, we inserted a percutaneous cardiopulmonary system and intra-aortic balloon pumping. Subsequent emergent coronary angiography showed 100% thrombotic total stent obstruction of triple vessels with thrombolysis in myocardial infarction 0 flow. Thrombectomy and balloon angioplasty were performed at the in-stent thrombotic sites. Despite our intensive care, he died due to heart failure on the third day after hospitalization.