Formation of Poly-L-Lysine-Porphyrin Derivative Complex Exhibiting Diminished Dark Toxicity in Aqueous Solutions and High Photodynamic Activity.

Poly-L-lysine (PLL) displays a high solubilizing ability for hydrophobic guest molecules, and when in complexes with guest molecules, it exhibits a high intracellular uptake. However, its high cytotoxicity, originating from its cationic character, significantly limits its applications in biological and medicinal chemistry. In this study, the amount of free PLL in an aqueous solution of a PLL-porphyrin complex was immensely reduced, resulting in considerably lower dark toxicity than that of the free PLL.

Association of Periodontitis with Mild Cognitive Impairment in Older Adults.

Background: Early detection of cognitive decline, including mild cognitive impairment, is expected to provide a better prognosis. Several studies have suggested an association between periodontitis and mild cognitive impairment.

Objectives/design: To test the hypothesis that there is an association between severe periodontitis and mild cognitive impairment in community residents who participated in a dental health check-up program.

Changes Over Time in Masseter Muscle Activity, Symptoms of Discomfort, Stress Level and Salivary Flow Rate Following Intra-Oesophageal Acid Infusion.

Background: Intra-oesophageal acid stimulation increases masseter muscle activity. However, the infusion speeds used in previous studies are significantly slow, with minimal acid volume (30 mL over 30 min). Additionally, it is unclear how masseter muscle activity, symptoms of discomfort, stress levels and saliva quantity change over time.

Metabolically inducing defects in DNA repair sensitizes -wild-type cancer cells to replication stress.

Metabolic reprogramming from oxidative respiration to glycolysis is generally considered to be advantageous for tumor initiation and progression. However, we found that breast cancer cells forced to perform glycolysis acquired a vulnerability to PARP inhibitors. Small-molecule inhibition of mitochondrial respiration-using glyceollin I, metformin, or phenformin-induced overproduction of the oncometabolite lactate, which acidified the extracellular milieu and repressed the expression of homologous recombination (HR)-associated DNA repair genes.

Dental Hygienists' Awareness of Medication-Related Osteonecrosis of the Jaw in Private Dental Clinics in Japan.

Medication-related osteonecrosis of the jaw (MRONJ) caused by bisphosphonates (BPs) and denosumab (Dmab) is still a major oral adverse event caused by cancer treatment and may be under-recognized by private dental services. With the aim of reducing the prevalence of MRONJ, this study, which is a pilot study for a planned future large-scale survey, compared knowledge about MRONJ between dental hygienists (DHs) in private dental clinics and those in cancer center hospitals. We conducted a questionnaire-based survey regarding MRONJ between 1 November 2023 and 31 January 2024 on DHs at a cancer base hospital and a private clinic in Saitama, Japan.