Dental impact of anti-fibroblast growth factor 23 therapy in X-linked hypophosphatemia

Elevated fibroblast growth factor 23(FGF23)in X-linked hypophosphatemia(XLH)results in rickets and phosphate wasting,manifesting by severe bone and dental abnormalities.Burosumab,a FGF23-neutralizing antibody,an alternative to conventional treatment(phosphorus and active vitamin D analogs),showed significant improvement in the long bone phenotype.Here,we examined whether FGF23 antibody(FGF23-mAb)also improved the dentoalveolar features associated with XLH.Four-week-old male Hyp mice were injected weekly with 4 or 16 mg·kg−1 of FGF23-mAb for 2 months and compared to wild-type(WT)and vehicle(PBS)treated Hyp mice(n=3–7 mice).Micro-CT analyses showed that both doses of FGF23-mAb restored dentin/cementum volume and corrected the enlarged pulp volume in Hyp mice,the higher concentration resulting in a rescue similar to WT levels.FGF23-mAb treatment also improved alveolar bone volume fraction and mineral density compared to vehicle-treated ones.Histology revealed improved mineralization of the dentoalveolar tissues,with a decreased amount of osteoid,predentin and cementoid.Better periodontal ligament attachment was also observed,evidenced by restoration of the acellular cementum.These preclinical data were consistent with the retrospective analysis of two patients with XLH showing that burosumab treatment improved oral features.Taken together,our data show that the dentoalveolar tissues are greatly improved by FGF23-mAb treatment,heralding its benefit in clinics for dental abnormalities.

Investigation of the Aroma Profile of Green Tea Leaves Using Organic Synthesis and Conventional Analytical Techniques

Although many aroma components have been identified in green tea leaves, the aroma compounds contributing to green tea＇s characteristic odor have not yet been reported. The authors recently reported that aroma components with a matcha-like odor are present in both green tea and black tea prepared from the Sayamakaori tea cuttivar. This matcha-like odor is similar to the odor of commercial available matcha （high-quality powdered green tea）, and is a specific odor feature of green tea leaves. At present, the green-tea odor is thought to arise from the combination of a large number of constituents. Recent reports indicate that a complex interaction between olfactory receptors and odorants is important for the evaluation of the odors. Taking into consideration these findings, the authors investigated the aroma profile of green tea, focusing on the characteristic molecular structures of the constituents that give matcha-like odor. Using a combination of organic synthesis and gas chromatography-mass spectrometry plus gas chromatography-olfactometry, the authors identified aroma components with matcha-like odors in five other tea cultivars. This investigation also revealed that several compounds with a formyl group were important constituents of the aroma of green tea leaves, although the odor of each constituent was not individually similar to the tea＇s overall aroma. The authors found for the first time a group of key components that have the matcha-like odor.

How are multiple satellites seen from the ground? Relative apparent motion and formation stabilization

This paper answers how multiple satellites are seen from the ground. This question is inspired by space-advertising, a public exhibition in the night sky using a dot matrix of satellites that are bright enough to be seen by the naked eye. Thus, it is important for space advertisement that the specific dot matrix is seen. Moreover, the stability of the dot matrix during a visible span is very valuable. To stabilize the dot matrix, this study formulates an apparent position of a dot from a representative dot seen from the ground. The formulation, linear functions of a set of relative orbital elements, reveals the appearance of the dot matrix. The proposed relative variable in the formulation drives the instability of the dot matrix, thereby revealing an initial stable configuration of deputies from a chief. The arbitrary dot matrix designed using the configuration is stable even at low elevations without orbital control during the visible span.