Metabolization of Free Oxidized Aromatic Amino Acids by Saccharomyces cerevisiae.

The aromatic amino acids tryptophan, phenylalanine, and tyrosine are targets for oxidation during food processing. We investigated whether S. cerevisiae can use nonproteinogenic aromatic amino acids as substrates for degradation via the Ehrlich pathway. The metabolic fate of seven amino acids (p-, o-, m-tyrosine, 3,4-dihydroxyphenylalanine (DOPA), 3-nitrotyrosine, 3-chlorotyrosine, and dityrosine) in the presence of S. cerevisiae was assessed. All investigated amino acids except dityrosine were metabolized by yeast. The amino acids 3-nitrotyrosine and o-tyrosine were removed from the medium as fast as p-tyrosine, and m-tyrosine, 3-chlorotyrosine, and DOPA more slowly. In summary, 11 metabolites were identified by high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS). DOPA, 3-nitrotyrosine, and p-tyrosine were metabolized predominantly to the Ehrlich alcohols, whereas o-tyrosine and m-tyrosine were metabolized predominantly to α-hydroxy acids. Our results indicate that nonproteinogenic aromatic amino acids can be taken up and transaminated by S. cerevisiae quite effectively but that decarboxylation and reduction to Ehrlich alcohols as the final metabolites is hampered by hydroxyl groups in the o- or m-positions of the phenyl ring. The data on amino acid metabolism were substantiated by the analysis of five commercial beer samples, which revealed the presence of hydroxytyrosol (ca. 0.01-0.1 mg/L) in beer for the first time.

Protocol for preparing layer-engineered van der Waals materials through atomic spalling.

Here, we present a protocol for preparing layer-engineered van der Waals (vdW) materials via an atomic spalling process. We describe steps for fixing bulk crystals and introduce the appropriate stressor materials. We then detail a deposition technique for internal stress regulation of stressor film, followed by layer-engineered atomic-scale spalling to exfoliate vdW materials with a controlled number of layers from bulk crystals. Lastly, we outline a procedure for polymer/stressor film removal. For complete details on the use and execution of this protocol, please refer to Moon et al.1.

Identification of Pseudomonas asiatica subsp. bavariensis str. JM1 as the first Nε -carboxy(m)ethyllysine-degrading soil bacterium.

Thermal food processing leads to the formation of advanced glycation end products (AGE) such as Nε -carboxymethyllysine (CML). Accordingly, these non-canonical amino acids are an important part of the human diet. However, CML is only partially decomposed by our gut microbiota and up to 30% are excreted via faeces and, hence, enter the environment. In frame of this study, we isolated a soil bacterium that can grow on CML as well as its higher homologue Nε -carboxyethyllysine (CEL) as sole source of carbon. Bioinformatic analyses upon whole-genome sequencing revealed a subspecies of Pseudomonas asiatica, which we named 'bavariensis'. We performed a metabolite screening of P. asiatica subsp. bavariensis str. JM1 grown either on CML or CEL and identified N-carboxymethylaminopentanoic acid and N-carboxyethylaminopentanoic acid respectively. We further detected α-aminoadipate as intermediate in the metabolism of CML. These reaction products suggest two routes of degradation: While CEL seems to be predominantly processed from the α-C-atom, decomposition of CML can also be initiated with cleavage of the carboxymethyl group and under the release of acetate. Thus, our study provides novel insights into the metabolism of two important AGEs and how these are processed by environmental bacteria.

Lymphoepithelioma-like, a variant of urothelial carcinoma of the urinary bladder: a case report and systematic review for optimal treatment modality for disease-free survival.

BACKGROUND: Lymphoepithelioma-like carcinoma (LELC) is a rare high-grade carcinoma that resembles nasopharyngeal lymphoepithelioma and can occur throughout the body. First reported in 1991, bladder LELC has an incidence of about 1% of all bladder carcinomas. Due to its rare occurrence, prognoses and ideal treatment guidelines have not been clearly defined. METHODS: A PubMed search was performed using two terms, "lymphoepithelioma-like carcinoma" and "bladder." Review articles, articles in foreign languages, expression studies, and studies not performed in the bladder were excluded. We report a case of LELC of the bladder including treatment and outcome and performed a systematic review of all 36 available English literatures from 1991 to 2016 including the present case to identify factors affecting disease-free survival. RESULTS: One hundred forty cases of bladder LELC were analyzed. The mean age of the patients was 70.1 years ranging from 43 to 90 years with 72% males and 28% females. Pure LELC occurs most often at 46% followed by mixed LELC 28% and predominant LELC 26%. EBV testing was negative in all cases tested. Mean follow-up length for all cases was 33.8 months with no evidence of disease in 62.2%, while 11.1% died of disease, 10.4% alive with metastasis, and 8.2% died without disease. 5.0% of cases had recurrence at an average of 31.3 months. Prognosis is significantly favorable for patients presenting with pure or predominant forms of LELC compared to mixed type (p < 0.0001). The treatment significantly associated with the highest disease mortality and lowest disease-free survival was TURBT alone when compared to any multi-modality treatment (p < 0.01). CONCLUSION: We conclude that the best treatment modality associated with the highest disease-free survival is multi-modal treatment including radical cystectomy.

47,XYY Syndrome and Male Infertility.

Men with 47,XYY syndrome present with varying physical attributes and degrees of infertility. A retrospective chart review was performed on a male infertility and genetic anomaly database. Three patients with 47,XYY were found. Each presented with > 2 years of infertility. All were tall with elevated body mass indices. Scrotal findings ranged from normal to atrophic testicles. Semen analyses demonstrated oligospermia and varying endocrine profiles. Because of the diverse phenotype and potential lack of symptoms, identification and diagnosis of men with 47,XYY syndrome may be difficult. We recommend careful screening of 47,XYY patients and referral to primary physicians for long-term follow-up for increased incidence of health-related comorbidities.

The efficacy of classical massage on stress perception and cortisol following primary treatment of breast cancer.

To investigate the efficacy of classical massage on stress perception and mood disturbances, 34 women diagnosed with primary breast cancer were randomized into an intervention or control group. For a period of 5 weeks, the intervention group (n = 17) received biweekly 30-min classical massages. The control group (n = 17) received no additional treatment to their routine health care. The Perceived Stress Questionnaire (PSQ) and the Berlin Mood Questionnaire (BSF) were used and the patients' blood was collected at baseline (T1), at the end of the intervention period (T2), and 6 weeks after T2 (T3). Compared with control group, women in the intervention group reported significantly lower mood disturbances, especially for anger (p = 0.048), anxious depression (p = 0.03) at T2, and tiredness at T3 (p = 0.01). No group differences were found in PSQ scales, cortisol and serotonin concentrations at T2 and T3. However, perceived stress and cortisol serum levels (p = 0.03) were significantly reduced after massage therapy (T2) compared with baseline in the intervention group. Further research is needed to validate our findings.

[Working conditions in home health care nursing: a survey of home care nurses in hospitals in Korea].

PURPOSE: The purpose of this research was to address the working conditions of home health nurses through a nationwide home health agency survey conducted at hospitals. METHOD: The mail surveys were sent to 303 home health nurses nation wide and returned with a response rate of 71.8%. RESULT: (a) Seventy-five percent of home health agencies were established within the past 5 years and half of home health nurses are over 40 years old. (b) Working conditions were considered as follows: Seventy-one percent of respondents were full-time employees, sixty-six percent of home health nurses had unscheduled visits on a regular day of duty and forty-eight percent were on vacation. Fifty-one percent of home health nurses have experienced traffic accidents and paid penalties (65.9%). Self-reported monthly income level per year was an average of 28,364,000 won. (c) Rates were significantly higher for shoulder pain (61.5%), lower back pain (54.1%), knee pain (39.4%), and gastrointestinal problems (33.0%). CONCLUSION: These baseline results show the importance of improving home health nursing working conditions, a comprehensive prevention system and safeguards from physical discomfort.