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1.
Nature ; 580(7803): 367-371, 2020 04.
Article in English | MEDLINE | ID: mdl-32296193

ABSTRACT

Nitrogen is the main constituent of the Earth's atmosphere, but its provenance in the Earth's mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth's accretion versus that subducted from the Earth's surface is unclear1-6. Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare 15N15N isotopologue of N2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle δ15N (the fractional difference in 15N/14N from air), N2/36Ar and N2/3He. Our results show that negative δ15N values observed in gases, previously regarded as indicating a mantle origin for nitrogen7-10, in fact represent dominantly air-derived N2 that experienced 15N/14N fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the 15N15N data allow extrapolations that characterize mantle endmember δ15N, N2/36Ar and N2/3He values. We show that the Eifel region has slightly increased δ15N and N2/36Ar values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts11, consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has δ15N values substantially greater than that of the convective mantle, resembling surface components12-15, its N2/36Ar and N2/3He ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume δ15N values may both be dominantly primordial features.

2.
Blood ; 141(13): 1626-1639, 2023 03 30.
Article in English | MEDLINE | ID: mdl-36564029

ABSTRACT

Allogeneic hematopoietic stem cell transplantation (allo-SCT) is the only curative treatment option for a number of hematologic malignancies. Its therapeutic potential relies on the potency of donor T cells to eliminate residual malignant cells, the so-called graft-versus-leukemia (GVL) effect. Disease relapse remains the most frequent treatment failure and is associated with poor outcome. Therefore, it is inevitable to decipher mechanisms that weaken GVL. In recent years, studies of tumor biology have revealed that metabolic remodeling of the micromilieu can critically regulate immune responses. Accumulation of reactive oxygen species leads to a metabolic condition known as oxidative stress, which can severely hamper T cells. Currently, only a few studies, mainly using preclinical models, have demonstrated the occurrence of oxidative stress after allo-SCTs. Therefore, we sought to investigate oxidative stress in a well-characterized group of patients who underwent allo-SCT and its impact on reconstituting T cells. We identified high concentrations of serum 8-hydroxydeoxyguanosine (8-OHdG) as an established biomarker for oxidative stress. 8-OHdG is one of the major products of DNA oxidation, which is normally rapidly removed. After allo-SCT, T cells accumulated oxidative DNA damage. High cellular 8-OHdG content (8-OHdGhi) was associated not only with signs of enhanced T-cell activation but also premature exhaustion. The inability of 8-OHdGhi T cells to efficiently target malignant cells or produce cytotoxic granzyme B and interferon gamma was associated with a significantly increased relapse risk and a shorter overall survival. Taken together, our novel findings could give reason to focus on bolstering DNA repair in reconstituting T cells as a means to improve GVL efficacy.


Subject(s)
Graft vs Host Disease , Hematopoietic Stem Cell Transplantation , Humans , T-Lymphocytes , Transplantation, Homologous , Chronic Disease , Recurrence , Oxidative Stress
4.
Nature ; 571(7765): E7, 2019 Jul.
Article in English | MEDLINE | ID: mdl-31263274

ABSTRACT

Change history: In this Article, the original affiliation 2 was not applicable and has been removed. In addition, in the Acknowledgements there was a statement missing and an error in a name. These errors have been corrected online.

5.
Nature ; 568(7753): 487-492, 2019 04.
Article in English | MEDLINE | ID: mdl-31019327

ABSTRACT

Carbon and other volatiles in the form of gases, fluids or mineral phases are transported from Earth's surface into the mantle at convergent margins, where the oceanic crust subducts beneath the continental crust. The efficiency of this transfer has profound implications for the nature and scale of geochemical heterogeneities in Earth's deep mantle and shallow crustal reservoirs, as well as Earth's oxidation state. However, the proportions of volatiles released from the forearc and backarc are not well constrained compared to fluxes from the volcanic arc front. Here we use helium and carbon isotope data from deeply sourced springs along two cross-arc transects to show that about 91 per cent of carbon released from the slab and mantle beneath the Costa Rican forearc is sequestered within the crust by calcite deposition. Around an additional three per cent is incorporated into the biomass through microbial chemolithoautotrophy, whereby microbes assimilate inorganic carbon into biomass. We estimate that between 1.2 × 108 and 1.3 × 1010 moles of carbon dioxide per year are released from the slab beneath the forearc, and thus up to about 19 per cent less carbon is being transferred into Earth's deep mantle than previously estimated.


Subject(s)
Carbon Dioxide/analysis , Carbon Sequestration , Geologic Sediments/chemistry , Biomass , Carbon Isotopes , Costa Rica , Geologic Sediments/microbiology , Helium
6.
Neuroradiology ; 66(10): 1747-1759, 2024 Oct.
Article in English | MEDLINE | ID: mdl-38951171

ABSTRACT

INTRODUCTION: The Derivo 2 Heal Embolization Device (D2HED) is a novel flow diverter (FD) providing a fibrin-/heparin-based surface coating aiming at lower thrombogenicity. We evaluate periprocedural aspects and preliminary aneurysm occlusion efficacy for intracranial aneurysm treatment. METHODS: Thirty-four D2HEDs deployments (34 aneurysms, 32 patients) between 04/2021 and 10/2023 were analyzed. All patients were under dual antiplatelet therapy (dAPT). Periprocedural details, adverse events, and follow-up (FU) imaging were reviewed by consultant-level neuroradiologists. Complication rates and aneurysm occlusion efficacy are compared with performance data of other FDs based on literature research. RESULTS: Each intervention succeeded in the deployment of one D2HED. Significant and/or increased intraaneurysmal contrast stagnation immediately after D2HED deployment was seen in 73.5% of cases according to O'Kelly-Marotta (OKM) grading scale. Clinically relevant early adverse events occurred in three patients: Among them two cases with fusiform aneurysms in the posterior circulation (ischemic events, early in-stent-thrombosis) and one patient (ischemic event) out of the majority of 31 treated internal carotid artery aneurysms (3,2%). Regarding mid-term FU (> 165 days), one aneurysm did not show progressive occlusion presumably caused by a prominent A1 segment arising from the terminal ICA aneurysm itself. Apart from that, mid-term complete / partial occlusion rates of 80% / 20% could be demonstrated. CONCLUSION: Our case series - although suffering from restricted sample size - suggests a potential effectiveness of D2HED in managing intracranial aneurysms. Further studies with larger samples are warranted to quantify long-term occlusion efficacy and the impact of antithrombogenic surface coating on the necessary (d)APT.


Subject(s)
Embolization, Therapeutic , Intracranial Aneurysm , Humans , Intracranial Aneurysm/therapy , Intracranial Aneurysm/diagnostic imaging , Embolization, Therapeutic/methods , Embolization, Therapeutic/instrumentation , Female , Male , Middle Aged , Aged , Treatment Outcome , Adult , Retrospective Studies , Cerebral Angiography , Coated Materials, Biocompatible
7.
Med Probl Perform Art ; 38(1): 16-22, 2023 Mar.
Article in English | MEDLINE | ID: mdl-36854972

ABSTRACT

OBJECTIVE: The feet of professional dancers are exposed to high work-related stresses. To date, data from the professional dance sector concerning this matter are lacking. The aim of this exploratory project was to analyze and evaluate skin health in the foot area with regard to the prevalence of dermatoses, their locations, as well as gender-specific and load-specific differences. METHODS: Professional classical and neo-classical ballet dancers were examined at two time points: in a phase with increased stress (T0: daily training sessions, rehearsals, and high performance frequency) (n=51, 35 females, 16 males) and after a 24-day rest phase (T1: n=35, 28 females, 7 males). In addition, gender-specific and load-specific (T0 and T1) differences were evaluated. RESULTS: All professional dancers were affected by skin lesions of the feet at T0. Hyperkeratosis (96.1%), onychomycosis (27.5%), and subungual hematoma (11.8%) were the most frequent dermatoses of the feet of professional dancers. Onychomycosis affected the nails of the big toes in particular (right 15.7%; left 13.7%), and subungual hematomas were found exclusively on the nails of the first toe (right 7.8%; left 7.8%). Women tended to be more frequently affected by hyperkeratosis, men more frequently by onychomycosis. There were no load-specific differences between the stress and rest phases. CONCLUSION: The prevalence of work-related dermatoses is equally high among female and male dancers. The results can be used for further research and serve as a basis for specific measures of behavioral and environmental prevention in dance.


Subject(s)
Dancing , Onychomycosis , Humans , Female , Male , Pilot Projects , Foot , Lower Extremity
8.
Br J Dermatol ; 184(1): 96-110, 2021 01.
Article in English | MEDLINE | ID: mdl-32271938

ABSTRACT

BACKGROUND: Human hair is highly responsive to stress, and human scalp hair follicles (HFs) contain a peripheral neuroendocrine equivalent of the systemic hypothalamic-pituitary-adrenal (HPA) stress axis. Androgenetic alopecia (AGA) is supposed to be aggravated by stress. We used corticotropin-releasing hormone (CRH), which triggers the HPA axis, to induce a stress response in human ex vivo male AGA HFs. Caffeine is known to reverse testosterone-mediated hair growth inhibition in the same hair organ culture model. OBJECTIVES: To investigate whether caffeine would antagonize CRH-mediated stress in these HFs. METHODS: HFs from balding vertex area scalp biopsies of men affected by AGA were incubated with CRH (10-7 mol L-1 ) with or without caffeine (0·001% or 0·005%). RESULTS: Compared to controls, CRH significantly enhanced the expression of catagen-inducing transforming growth factor-ß2 (TGF-ß2) (P < 0·001), CRH receptors 1 and 2 (CRH-R1/2) (P < 0·01), adrenocorticotropic hormone (ACTH) (P < 0·001) and melanocortin receptor 2 (MC-R2) (P < 0·001), and additional stress-associated parameters, substance P and p75 neurotrophin receptor (p75NTR ). CRH inhibited matrix keratinocyte proliferation and expression of anagen-promoting insulin-like growth factor-1 (IGF-1) and the pro-proliferative nerve growth factor receptor NGF-tyrosine kinase receptor A (TrkA). Caffeine significantly counteracted all described stress effects and additionally enhanced inositol trisphosphate receptor (IP3 -R), for the first time detected in human HFs. CONCLUSIONS: These findings provide the first evidence in ex vivo human AGA HFs that the stress mediator CRH induces not only a complex intrafollicular HPA response, but also a non-HPA-related stress response. Moreover, we show that these effects can be effectively antagonized by caffeine. Thus, these data strongly support the hypothesis that stress can impair human hair physiology and induce hair loss, and that caffeine may effectively counteract stress-induced hair damage and possibly prevent stress-induced hair loss.


Subject(s)
Corticotropin-Releasing Hormone , Receptor, Melanocortin, Type 2 , Adrenocorticotropic Hormone/metabolism , Androgens , Caffeine/pharmacology , Corticotropin-Releasing Hormone/metabolism , Hair Follicle/metabolism , Humans , Hypothalamo-Hypophyseal System/metabolism , Male , Pituitary-Adrenal System/metabolism , Receptor Protein-Tyrosine Kinases , Receptors, Nerve Growth Factor , Scalp/metabolism , Substance P
9.
J Acoust Soc Am ; 150(2): 673, 2021 08.
Article in English | MEDLINE | ID: mdl-34470279

ABSTRACT

Typically, the coding strategies of cochlear implant audio processors discard acoustic temporal fine structure information (TFS), which may be related to the poor perception of interaural time differences (ITDs) and the resulting reduced spatial hearing capabilities compared to normal-hearing individuals. This study aimed to investigate to what extent bilateral cochlear implant (BiCI) recipients can exploit ITD cues provided by a TFS preserving coding strategy (FS4) in a series of sound field spatial hearing tests. As a baseline, we assessed the sensitivity to ITDs and binaural beats of 12 BiCI subjects with a coding strategy disregarding fine structure (HDCIS) and the FS4 strategy. For 250 Hz pure-tone stimuli but not for broadband noise, the BiCI users had significantly improved ITD discrimination using the FS4 strategy. In the binaural beat detection task and the broadband sound localization, spatial discrimination, and tracking tasks, no significant differences between the two tested coding strategies were observed. These results suggest that ITD sensitivity did not generalize to broadband stimuli or sound field spatial hearing tests, suggesting that it would not be useful for real-world listening.


Subject(s)
Cochlear Implantation , Cochlear Implants , Sound Localization , Acoustic Stimulation , Hearing , Hearing Tests , Humans
10.
Hautarzt ; 72(11): 975-983, 2021 Nov.
Article in German | MEDLINE | ID: mdl-34387709

ABSTRACT

BACKGROUND: Actinic keratosis (AK) is an epithelial carcinoma in situ of the skin. There is a need for early treatment due to the risk of malignant transformation. In addition to being effective, the initial therapy in particular should be well tolerated and user-friendly. Potassium hydroxide (KOH) solution is already established as keratolytic treatment option for hyperkeratotic skin diseases such as mollusca contagiosa. MATERIALS AND METHODS: A prospective single-arm, multicentre medical device study (Treatment of AK with KOH, TAKKOH) was conducted to investigate the efficacy and safety of KOH 5% solution for the treatment of mild to moderate AK. Patients applied KOH solution twice daily for 14 days with a subsequent off-treatment phase of 14 days (≙ one treatment cycle) for a maximum of three treatment cycles or at least until treatment success was achieved. Treatment success, defined as complete remission (CR) of all AK lesions of a patient, was the primary objective. Secondary objectives included the evaluation of partial remission (PR), the number of AK lesions in remission, efficacy assessment by investigators and patients with a 6­point grading system and several safety parameters. RESULT: In all, 73 patients were enrolled in the study. CR was achieved in 54.9% of patients, whereas PR was observed in 64.8% with a 69.9% reduction in lesion numbers. With respect to safety, 46.6% of the patients experienced adverse events. Most of these events (82.6%) were adverse reactions comprising exclusively short-lived and mild local skin reactions. CONCLUSIONS: The study provides an indication of the efficacy and safety of KOH 5% solution for the lesion-directed topical therapy of AK.


Subject(s)
Keratosis, Actinic , Humans , Hydroxides , Keratosis, Actinic/diagnosis , Keratosis, Actinic/drug therapy , Potassium Compounds/adverse effects , Prospective Studies , Treatment Outcome
11.
J Med Virol ; 92(8): 1065-1074, 2020 08.
Article in English | MEDLINE | ID: mdl-31883139

ABSTRACT

Polymerase chain reaction (PCR) detection has become the gold standard for diagnosis and typing of enterovirus (EV) and human parechovirus (HPeV) infections. Its effectiveness depends critically on using the appropriate sample types and high assay sensitivity as viral loads in cerebrospinal fluid samples from meningitis and sepsis clinical presentation can be extremely low. This study evaluated the sensitivity and specificity of currently used commercial and in-house diagnostic and typing assays. Accurately quantified RNA transcript controls were distributed to 27 diagnostic and 12 reference laboratories in 17 European countries for blinded testing. Transcripts represented the four human EV species (EV-A71, echovirus 30, coxsackie A virus 21, and EV-D68), HPeV3, and specificity controls. Reported results from 48 in-house and 15 commercial assays showed 98% detection frequencies of high copy (1000 RNA copies/5 µL) transcripts. In-house assays showed significantly greater detection frequencies of the low copy (10 copies/5 µL) EV and HPeV transcripts (81% and 86%, respectively) compared with commercial assays (56%, 50%; P = 7 × 10-5 ). EV-specific PCRs showed low cross-reactivity with human rhinovirus C (3 of 42 tests) and infrequent positivity in the negative control (2 of 63 tests). Most or all high copy EV and HPeV controls were successfully typed (88%, 100%) by reference laboratories, but showed reduced effectiveness for low copy controls (41%, 67%). Stabilized RNA transcripts provide an effective, logistically simple and inexpensive reagent for evaluation of diagnostic assay performance. The study provides reassurance of the performance of the many in-house assay formats used across Europe. However, it identified often substantially reduced sensitivities of commercial assays often used as point-of-care tests.


Subject(s)
Enterovirus Infections/diagnosis , Enterovirus/classification , Parechovirus/classification , Picornaviridae Infections/diagnosis , RNA, Viral/genetics , Enterovirus Infections/virology , Europe , Gene Dosage , Humans , Meningitis, Viral/diagnosis , Molecular Typing , Picornaviridae Infections/virology , Reagent Kits, Diagnostic , Real-Time Polymerase Chain Reaction , Reproducibility of Results , Sensitivity and Specificity
12.
Epidemiol Infect ; 148: e52, 2020 02 17.
Article in English | MEDLINE | ID: mdl-32063241

ABSTRACT

Norovirus (NoV) infections occur very frequently yet are rarely diagnosed. In Denmark, NoV infections are not under surveillance. We aimed to collect and describe existing laboratory-based NoV data. National NoV laboratory data were collected for 2011-2018, including information on patient identification number, age and sex, requesting physician, analysis date and result. We defined positive patient-episodes by using a 30-day time window and performed descriptive and time series analysis. Diagnostic methods used were assessed through a survey. We identified 15 809 patient-episodes (11%) out of 142 648 tested patients with an increasing trend, 9366 in 2011 vs. 32 260 in 2018. This corresponded with a gradual introduction of polymerase chain reaction analysis in laboratories. The highest positivity rate was in patients aged <5 years (15%) or >85 years (17%). There was a large difference in test performance over five Danish geographical regions and a marked seasonal variation with peaks from December to February. This is the first analysis of national NoV laboratory data in Denmark. A future laboratory-based surveillance system may benefit public health measures by describing trend, burden and severity of seasons and possibly pinpoint hospital outbreaks.


Subject(s)
Caliciviridae Infections , Disease Outbreaks , Adolescent , Adult , Aged , Aged, 80 and over , Caliciviridae Infections/diagnosis , Caliciviridae Infections/epidemiology , Child , Child, Preschool , Denmark/epidemiology , Female , Humans , Infant , Infant, Newborn , Male , Middle Aged , Seasons , Young Adult
13.
Hautarzt ; 71(2): 109-113, 2020 Feb.
Article in German | MEDLINE | ID: mdl-31965204

ABSTRACT

BACKGROUND: Plasma medicine is gaining increasing interest and provides a multitude of dermatological applications. Cold atmospheric pressure plasma (CAP) can be used in clinical applications without harming the treated tissue or in a tissue destructive manner. It consists of a complex mixture of biologically active agents, which can act synergistically on the treated material or tissue. OBJECTIVES: A summary of the current research findings regarding dermatological applications of CAP is provided. METHODS: Literature on CAP applications in dermatology has been screened and summarized. RESULTS: CAP exerts antimicrobial, tissue-stimulating, blood-flow-stimulating but also pro-apoptotic effects. By exploiting these properties, CAP is successfully applied for disinfection and treatment of chronic ulcerations. Furthermore, positive effects of CAP have been shown for the treatment of tumors, actinic keratosis, scars, ichthyosis, atopic eczema as well as for alleviation of pain and itch. CONCLUSIONS: While the use of CAP for disinfection and wound treatment has already moved into clinical practice, further applications such as cancer treatment are still exploratory.


Subject(s)
Dermatology , Plasma Gases , Skin Diseases , Dermatology/trends , Humans , Plasma Gases/therapeutic use , Skin Diseases/therapy , Wound Healing
14.
Hautarzt ; 71(11): 855-862, 2020 Nov.
Article in German | MEDLINE | ID: mdl-32997219

ABSTRACT

BACKGROUND: Besides acute wounds (through trauma or surgical interventions), chronic wounds comprise a relatively large and heterogeneous group of diseases. These include leg ulcers with venous disease greatly prevailing arterial disease, diabetic foot syndrome, and pressure ulcers. Due to a considerable treatment resistance against such therapies, new and effective, additive treatment options especially for chronic wounds are needed. Wound treatment with cold atmospheric plasma (CAP) constitutes such an innovative option. OBJECTIVES: Current research regarding the efficacy of cold plasma for healing of acute and chronic wounds is summarized. MATERIALS AND METHODS: The literature on CAP applications in wound healing has been screened and reviewed. RESULTS: With CAP, several effects that promote wound healing can be simultaneously applied in one application. On the one hand, CAP exerts a strong and broad antimicrobial activity against biofilm. On the other hand, the plasma cocktail, which consists of reactive nitrogen and oxygen species, UV, and charged particles (electrical current), mediates tissue-stimulating, blood flow-promoting, and anti-inflammatory effects. Marked germ reduction on wounds and accelerated wound healing have already been convincingly demonstrated in controlled clinical studies. CONCLUSIONS: The comprehensive CAP study landscape with structured case report summaries and randomized case-control studies allows the conclusion that CAP is safe, effective, and easy to handle for wound treatment. The utilization of CAP in addition to standard wound treatments is starting to enter routine clinical practice.


Subject(s)
Diabetic Foot , Leg Ulcer , Plasma Gases , Atmospheric Pressure , Diabetic Foot/therapy , Humans , Plasma Gases/therapeutic use , Wound Healing
15.
J Intern Med ; 286(4): 469-480, 2019 10.
Article in English | MEDLINE | ID: mdl-31259452

ABSTRACT

BACKGROUND: In randomized trials, it has been found that maternal influenza vaccination reduces influenza infections in both women and their infants. However, these trials have been performed in low-resource settings, and evidence from high-resource settings is limited. METHODS: Nested within a register-based cohort of all women giving birth in Denmark between 2010 and 2016 (n = 357 810 births), we conducted two case-control studies using a test-negative design of all pregnant women and their infants, respectively, tested for influenza virus with reverse transcriptase-polymerase chain reaction. Influenza virus-positive cases were matched (1:1) with influenza virus-negative controls for calendar time and (gestational or infant) age at testing. The effectiveness of maternal immunization with trivalent inactivated influenza vaccine was estimated from the odds ratios of vaccination among cases versus controls using logistic regression with adjustment for potential confounders. RESULTS: Among 313 pregnant women positive for influenza virus, 16 (5.1%) were vaccinated; by comparison, 34 (10.9%) pregnant women were vaccinated among 313 matched influenza virus-negative controls. The effectiveness of vaccination against laboratory-confirmed influenza infection in pregnant women was 63.9% [95% confidence interval (CI), 29.1 to 81.6]. Among 460 infants positive for influenza virus, 23 (5.0%) were offspring of women vaccinated during pregnancy; by comparison, 52 (11.3%) infants were the offspring of women vaccinated during pregnancy among 460 matched influenza virus-negative controls. The effectiveness of maternal vaccination against laboratory-confirmed influenza infection in infants younger than 6 months of age was 56.8% (95% CI, 25.0 to 75.1). CONCLUSIONS: Seasonal trivalent inactivated influenza vaccination in pregnancy was associated with a statistically significant reduced risk of laboratory-confirmed influenza infections in pregnant women and their infants in a high-resource setting.


Subject(s)
Influenza Vaccines/administration & dosage , Influenza, Human/prevention & control , Pregnancy Complications, Infectious/prevention & control , Adult , Case-Control Studies , Denmark/epidemiology , Female , Humans , Infant , Infant, Newborn , Influenza, Human/epidemiology , Pregnancy , Pregnancy Complications, Infectious/epidemiology
16.
Psychol Med ; 48(2): 337-346, 2018 Jan.
Article in English | MEDLINE | ID: mdl-28705261

ABSTRACT

BACKGROUND: Social media presents an important means for social interaction, especially among adolescents, with Instagram being the most popular platform in this age-group. Pictures and communication about non-suicidal self-injury (NSSI) can frequently be found on the internet. METHODS: During 4 weeks in April 2016, n = 2826 (from n = 1154 accounts) pictures which directly depicted wounds on Instagram were investigated. Those pictures, associated comments, and user accounts were independently rated for content. Associations between characteristics of pictures and comments as well as weekly and daily trends of posting behavior were analyzed. RESULTS: Most commonly, pictures depicted wounds caused by cutting on arms or legs and were rated as mild or moderate injuries. Pictures with increasing wound grades and those depicting multiple methods of NSSI generated elevated amounts of comments. While most comments were neutral or empathic with some offering help, few comments were hostile. Pictures were mainly posted in the evening hours, with a small peak in the early morning. While there was a slight peak of pictures being posted on Sundays, postings were rather evenly spread across the week. CONCLUSIONS: Pictures of NSSI are frequently posted on Instagram. Social reinforcement might play a role in the posting of more severe NSSI pictures. Social media platforms need to take appropriate measures for preventing online social contagion.


Subject(s)
Reinforcement, Social , Self-Injurious Behavior/psychology , Skin/injuries , Social Media/statistics & numerical data , Adolescent , Adult , Child , Empathy , Female , Humans , Interpersonal Relations , Male , Photography , Social Perception , Young Adult
18.
Br J Dermatol ; 179(2): 471-477, 2018 08.
Article in English | MEDLINE | ID: mdl-29577247

ABSTRACT

BACKGROUND: Increased skin-surface pH is an important host-related factor for deteriorated barrier function in aged skin. OBJECTIVES: We investigated whether restoration of skin pH through topical application of a water-in-oil emulsion with pH 4 improved the barrier homeostasis in aged skin, and compared the effects with an identical galenic formulation with pH 5·8. METHODS: The effects of the test formulations on barrier recovery were investigated by repeated measurements of transepidermal water loss (TEWL) and skin pH 3 h, 6 h and 24 h after acetone-induced impairment of barrier function in aged skin. The long-term effects of the pH 4 and pH 5·8 emulsions were analysed by investigation of the barrier integrity and cohesion, the skin-surface pH and the skin roughness and scaliness before and after a 4-week, controlled application of the formulations. RESULTS: The application of the pH 4 emulsion accelerated barrier recovery in aged skin: 3 h and 6 h after acetone-induced barrier disruption the differences in the TEWL recovery between the pH 4 treated and acetone control fields were significant. Furthermore, long-term application of the pH 4 formulation resulted in significantly decreased skin pH, enhanced barrier integrity and reduced skin-surface roughness and scaliness. At the same time points, the pH 5·8 formulation exerted only minor effects on the barrier function parameters. CONCLUSIONS: Exogenous acidification through topical application of a water-in-oil emulsion with pH 4 leads to improvement of the skin barrier function and maintenance of the barrier homeostasis in aged skin.


Subject(s)
Dermatologic Agents/administration & dosage , Skin Aging/drug effects , Skin/drug effects , Aged , Aged, 80 and over , Dermatologic Agents/chemistry , Emulsions , Female , Humans , Hydrogen-Ion Concentration , Male , Middle Aged , Oils/chemistry , Prospective Studies , Skin/chemistry , Time Factors , Treatment Outcome , Water/chemistry , Water Loss, Insensible/drug effects
19.
J Eur Acad Dermatol Venereol ; 32(5): 805-811, 2018 May.
Article in English | MEDLINE | ID: mdl-29283463

ABSTRACT

BACKGROUND: Conventional cervicofacial rhytidectomy has become the standard treatment of skin excess of the ageing neck. However, some patients want to avoid an extensive surgical procedure, especially if the anterior neck is the predominant problem zone. OBJECTIVE: To report on the efficacy and safety of a zigzag-shaped skin excision combined with platysma plication. METHODS AND MATERIALS: We present a retrospective case review series of six female patients. Skin excess was marked preoperatively using the skin pinching technique, then transferred to a zigzag-shaped area and finally excised using the method according to Tschopp, which is described. Patients were followed up for at least 1 year. RESULTS: All patients (age: 55-82 years, median: 65 years) were very satisfied with the results. On an overall patient satisfaction scale of 1-10 (1 being the best), the scars were graded on average 1.85 (median: 2) 1 year after surgery. No scar hypertrophy, functional impairment, nerve damage or other serious complications were observed. CONCLUSION: In selected patients, the direct anterior zigzag-shaped excision poses an effective, safe and easy surgical option for both skin excess and fat excess and platysma banding. The technique is easily reproducible, with low morbidity and high patient satisfaction.


Subject(s)
Cervicoplasty/methods , Rejuvenation , Rhytidoplasty/methods , Aged , Aged, 80 and over , Cervicoplasty/adverse effects , Cicatrix/etiology , Female , Follow-Up Studies , Humans , Middle Aged , Neck , Patient Satisfaction , Retrospective Studies
20.
Nano Lett ; 17(12): 7234-7241, 2017 12 13.
Article in English | MEDLINE | ID: mdl-29148808

ABSTRACT

The miniaturization of complementary metal-oxide-semiconductor (CMOS) devices becomes increasingly difficult due to fundamental limitations and the increase of leakage currents. Large research efforts are devoted to find alternative concepts that allow for a larger data-density and lower power consumption than conventional semiconductor approaches. Spin waves have been identified as a potential technology that can complement and outperform CMOS in complex logic applications, profiting from the fact that these waves enable wave computing on the nanoscale. The practical application of spin waves, however, requires the demonstration of scalable, CMOS compatible spin-wave detection schemes in material systems compatible with standard spintronics as well as semiconductor circuitry. Here, we report on the wave-vector independent detection of short-waved spin waves with wavelengths down to 150 nm by the inverse spin Hall effect in spin-wave waveguides made from ultrathin Ta/Co8Fe72B20/MgO. These findings open up the path for miniaturized scalable interconnects between spin waves and CMOS and the use of ultrathin films made from standard spintronic materials in magnonics.

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