Essential amino acid starvation induces cell cycle arrest, autophagy, and inhibits osteogenic differentiation in murine osteoblast.

This study investigates the effects of essential amino acid (EAA) starvation on murine osteoblasts cells and the underlying mechanisms. We performed and observed the cell proliferation, autophagy, and osteogenic differentiation under deprivation of EAA in vitro. The results showed that EAA starvation resulted in cell cycle arrest via phosphorylation of the MAPK signaling pathway, leading to inhibition of cell proliferation and osteogenic differentiation. Additionally, the LKB1-AMPK signaling pathway was also found to be phosphorylated, inducing autophagy. These findings highlight the significant role of EAA in regulating cellular processes. Furthermore, this study contributes to our understanding of the effects of nutrient deprivation on cellular physiology and may aid in the development of novel therapeutic strategies for diseases associated with amino acid metabolism.

High-Intensity Red Light-Emitting Diode Irradiation Suppresses the Inflammatory Response of Human Periodontal Ligament Stem Cells by Promoting Intracellular ATP Synthesis.

Periodontitis is an inflammatory lesion in the periodontal tissue. The behavior of human periodontal ligament stem cells (hPDLSCs), which play an important role in periodontal tissue regeneration, is restricted by the influence of inflammatory mediators. Photobiomodulation therapy exerts anti-inflammatory effects. The purpose of this study was to investigate the effects of light-emitting diode (LED) irradiation on the inflammatory responses of hPDLSCs. The light source was a red LED (peak wavelength: 650 nm), and the total absolute irradiance was 400 mW/cm2. The inflammatory response in hPDLSCs is induced by tumor necrosis factor (TNF)-α. Adenosine triphosphate (ATP) levels and pro-inflammatory cytokine (interleukin [IL]-6 and IL-8) production were measured 24 h after LED irradiation, and the effects of potassium cyanide (KCN) were investigated. LED irradiation at 6 J/cm2 significantly increased the ATP levels and reduced TNF-α-induced IL-6 and IL-8 production. Furthermore, the inhibitory effect of LED irradiation on the production of pro-inflammatory cytokines was inhibited by KCN treatment. The results of this study showed that high-intensity red LED irradiation suppressed the TNF-α-stimulated pro-inflammatory cytokine production in hPDLSCs by promoting ATP synthesis. These results suggest that high-intensity red LED is a useful tool for periodontal tissue regeneration in chronically inflamed tissues.

Biological Effects of Shikonin in Human Gingival Fibroblasts via ERK 1/2 Signaling Pathway.

Shikonin, an active ingredient of Lithospermum erythrorhizon, exerts anti-inflammatory and antibacterial effects, and promotes wound healing. We investigated whether shikonin stimulated gingival tissue wound healing in human gingival fibroblasts (hGF). In addition, we evaluated the effects of shikonin on the mitogen-activated protein kinase (MAPK) signaling pathway, which has an important role in wound healing. hGF were subjected to primary culture using gingiva collected from patients. The cells were exposed to/treated with Shikonin at concentrations ranging from 0.01 to 100 µM. The optimal concentration was determined by cell proliferation and migration assays. Type I collagen and fibronectin synthesis, the gene expression of vascular endothelial growth factor (VEGF) and FN, and the phosphorylation of Extracellular signal-regulated kinase (ERK) 1/2 were investigated. Identical experiments were performed in the presence of PD98059 our data suggest, a specific ERK 1/2 inhibitor. Shikonin significantly promoted hGF proliferation and migration. Shikonin (1 µM) was chosen as the optimal concentration. Shikonin promoted type I collagen and FN synthesis, increased VEGF and FN expression, and induced ERK 1/2 phosphorylation. These changes were partially suppressed by PD98059. In conclusion, Shikonin promoted the proliferation, migration, type I collagen and FN synthesis, and expression of VEGF and FN via ERK 1/2 signaling pathway in hGFs. Therefore, shikonin may promote periodontal tissue wound healing.

[Consideration of the Work Content of the Clinic Pharmacist and Its Usefulness].

"Medical teams"have been promoted in the home care setting. For the pharmacist, it is possible to maintain the safety and improve the quality of medical care by working with a multidisciplinary team. The arrangement of the pharmacist with the clinic is specified in Article 18 of the Medical Care Law, but there is no medical treatment fee for the clinic pharmacist. We examined the work content and usefulness of the clinic pharmacist. The work content was to participate in visiting consultation, introduce pharmacotherapy management based on the clinic pharmacist's working protocol, propose prescriptions, provide drug information service, and cooperate with insurance pharmacy pharmacists. Because the pharmacist was working in the clinic, he or she was able to actively intervene in drug treatment. Intervention in medication requires organizing and gathering information, which is difficult in the position of the insurance pharmacy pharmacist. The fact that the clinic pharmacist assumes this role and works with insurance pharmacy pharmacists makes it possible to maintain the safety and improve the quality of medical care.

[Differential Diagnosis of Interstitial Pneumonia by Home Ultrasound Examination].

BACKGROUND: Patients receiving home care present clinically diverse forms of chronic respiratory failure, for which it is difficult to establish a definite diagnosis. CT diagnosis requires the patient to be transported, and obtaining the blood test results for the serum maker KL-6 requires a few days. Nevertheless, with the widespread use of portable ultrasound devices, we can now make an immediate ultrasound diagnosis of the lung in the home care setting. In our experience, most patients with deteriorated interstitialpneumonia show characteristic large disseminated B-lines or pleural effusion. This makes it possible to differentiate it from pneumonia, pulmonary emphysema, or cardiac insufficiency, which have similar clinical findings. PURPOSE: To consider the possibility of using ultrasonography for the differential diagnosis of interstitial pneumonia. SUBJECTS: Eighteen patients with chronic respiratory failure receiving home care underwent ultrasonography and blood test(serum KL-6). METHODS: We examined the presence or absence of pleural effusion and B-line in patients who underwent lung echocardiogram examination and had a serum KL-6 level greater or less than 500 U/mL. RESULTS: All 8 patients with KL-6 levels greater than 500 U/mL showed B-lines or pleural effusion. However, only 2 of the 10 patients with KL-6 levels less than 500 U/mL showed B-lines. CONCLUSION: Ultrasonography of patients with interstitial pneumonia, which is a cause of chronic respiratory failure, revealed a characteristic large and disseminated hyperechoic area. Although the number of patients was limited, we may consider ultrasonography effective for the diagnosis of interstitial pneumonia in the home care setting.

[How to make sure a balloon-type gastrostomy replacement was made right by ultrasound].

With the spread of gastric fistula, there have been increased reports of catheter aberrant and fistula damage during the time of catheter exchange procedures. Therefore, it has been recommended that a diagnostic imaging or endoscopic gastrostomy should be employed to make sure a catheter exchange was properly done. However, it is difficult to enforce an inspection using an X-ray or endoscopy in the home care environment. Here we examined the usefulness and problems associated with ultrasound catheter-validation for home care environment. Of 33 patients who received gastrostomy, we focused on 6 patients who had gastrostomy exchanged at home. Four out of 6 patients with a balloon-type gastrostomy exchanged clearly confirmed a good result by ultra sound. However, a patient with bumper-type was unclear. The reason being unclear was due to the material and shape of the appearance by the echo. Left costal arch operations approach is to scan the probe along the left side of the abdomen below the costal arch, so that a replaced gastrostomy catheter could be confirmed by following the low echoic area of the spleen, stomach vault and into the stomach cavity. It is considered that ultrasound examination of the exchanged balloon-type gastrostomy was useful under a consideration of patient's health conditions.

[Introduction of Rapidtip BNP and Rapidpia--a clinical significance of rapid measurement BNP for home medicine care].

Dyspnea is a common symptom, and a heart failure is one of the most important preferred diagnoses of dyspnea. But it is difficult to undergo ECG, US, or other examination to diagnose a heart failure at the patient home, especially in the case of such examination was needed quickly or frequently. Rapidtip BNP and Rapidpia were invented in order to measure BNP rapidly at the patient home, or in the physician's car.