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1.
Cells ; 13(4)2024 Feb 11.
Artículo en Inglés | MEDLINE | ID: mdl-38391942

RESUMEN

The oral consumption of alcohol (ethanol) has a long tradition in humans and is an integral part of many cultures. The causal relationship between ethanol consumption and numerous diseases is well known. In addition to the well-described harmful effects on the liver and pancreas, there is also evidence that ethanol abuse triggers pathological skin conditions, including acne. In the present study, we addressed this issue by investigating the effect of ethanol on the energy metabolism in human SZ95 sebocytes, with particular focus on qualitative and quantitative lipogenesis. It was found that ethanol is a strong trigger for lipogenesis, with moderate effects on cell proliferation and toxicity. We identified the non-oxidative metabolism of ethanol, which produced fatty acid ethyl esters (FAEEs), as relevant for the lipogenic effect-the oxidative metabolism of ethanol does not contribute to lipogenesis. Correspondingly, using the Seahorse extracellular flux analyzer, we found an inhibition of the mitochondrial oxygen consumption rate as a measure of mitochondrial ATP production by ethanol. The ATP production rate from glycolysis was not affected. These data corroborate that ethanol-induced lipogenesis is independent from oxygen. In sum, our results give a causal explanation for the prevalence of acne in heavy drinkers, confirming that alcoholism should be considered as a systemic disease. Moreover, the identification of key factors driving ethanol-dependent lipogenesis may also be relevant in the treatment of acne vulgaris.


Asunto(s)
Acné Vulgar , Lipogénesis , Humanos , Glándulas Sebáceas/metabolismo , Etanol/metabolismo , Adenosina Trifosfato/metabolismo
2.
Int J Mol Sci ; 24(7)2023 Mar 27.
Artículo en Inglés | MEDLINE | ID: mdl-37047260

RESUMEN

Propofol belongs to a class of molecules that are known to block learning and memory in mammals, including rodents and humans. Interestingly, learning and memory are not tied to the presence of a nervous system. There are several lines of evidence indicating that single-celled organisms also have the capacity for learning and memory which may be considered as basal intelligence. Here, we introduce a new experimental model for testing the learning ability of Physarum polycephalum, a model organism frequently used to study single-celled "intelligence". In this study, the impact of propofol on Physarum's "intelligence" was tested. The model consists of a labyrinth of subsequent bifurcations in which food (oat flakes soaked with coconut oil-derived medium chain triglycerides [MCT] and soybean oil-derived long chain triglycerides [LCT]) or propofol in MCT/LCT) is placed in one of each Y-branch. In this setting, it was tested whether Physarum memorized the rewarding branch. We saw that Physarum was a quick learner when capturing the first bifurcations of the maze; thereafter, the effect decreased, perhaps due to reaching a state of satiety. In contrast, when oat flakes were soaked with propofol, Physarum's preference for oat flakes declined significantly. Several possible actions, including the blocking of gamma-aminobutyric acid (GABA) receptor signaling, are suggested to account for this behavior, many of which can be tested in our new model.


Asunto(s)
Physarum polycephalum , Propofol , Humanos , Propofol/farmacología , Anestésicos Intravenosos/farmacología , Dolor , Triglicéridos/farmacología
3.
J Med Virol ; 95(3): e28652, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36897017

RESUMEN

The antiviral drugs tecovirimat, brincidofovir, and cidofovir are considered for mpox (monkeypox) treatment despite a lack of clinical evidence. Moreover, their use is affected by toxic side-effects (brincidofovir, cidofovir), limited availability (tecovirimat), and potentially by resistance formation. Hence, additional, readily available drugs are needed. Here, therapeutic concentrations of nitroxoline, a hydroxyquinoline antibiotic with a favourable safety profile in humans, inhibited the replication of 12 mpox virus isolates from the current outbreak in primary cultures of human keratinocytes and fibroblasts and a skin explant model by interference with host cell signalling. Tecovirimat, but not nitroxoline, treatment resulted in rapid resistance development. Nitroxoline remained effective against the tecovirimat-resistant strain and increased the anti-mpox virus activity of tecovirimat and brincidofovir. Moreover, nitroxoline inhibited bacterial and viral pathogens that are often co-transmitted with mpox. In conclusion, nitroxoline is a repurposing candidate for the treatment of mpox due to both antiviral and antimicrobial activity.


Asunto(s)
Reposicionamiento de Medicamentos , Mpox , Nitroquinolinas , Humanos , Antibacterianos/farmacología , Antivirales/farmacología , Cidofovir , Mpox/tratamiento farmacológico , Nitroquinolinas/farmacología
5.
J Cosmet Dermatol ; 22(2): 426-432, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36575882

RESUMEN

BACKGROUND: Calcium hydroxylapatite (CaHA; Radiesse, Merz North America) restores volume and stimulates collagen production. The aim of this research was to explore the role of dilution and diffusion in microsphere distribution and the effect of CaHA concentration on activation of fibroblasts to produce collagen. METHODS: Ex vivo: Tissue dispersion of CaHA was assessed in abdominal tissue segments obtained from patients which were subsequently injected with CaHA diluted to 1:1 and hyperdiluted to 1:2. In vitro: Collagen type III (COLIII) and type I (COLI) expression of fibroblasts was evaluated after 24 and 72 h of incubation with CaHA concentrations of 1.5 (high dilution), 3.0, and 4.5 mg/ml (low dilution). RESULTS: Ex vivo: The 1:2 CaHA hyperdilution increased dispersion and decreased concentration of CaHA microspheres compared with the 1:1 dilution. In vitro: CaHA incubation resulted in an increased mean COLIII expression of 123% at 24 h. COLI synthesis did not change after 24 h but increased up to 124% at 72 h. Only fibroblasts in direct contact with CaHA increased COLIII expression. COLIII high-expressing cells were fully activated by CaHA and resulted in the same level of COLIII expression per cell independent of the CaHA dilution. CONCLUSIONS: A 1:2 hyperdilution of CaHA increased tissue dispersion of CaHA microspheres. Direct contact of CaHA with fibroblasts was a key factor for inducing neocollagenesis. COLIII high-expressing cells were fully activated by CaHA and resulted in the same expression level of COLIII per cell independent of the CaHA amount in each dilution. This indicates that increased collagen expression was due to the activation of more fibroblasts.


Asunto(s)
Técnicas Cosméticas , Envejecimiento de la Piel , Humanos , Durapatita/farmacología , Microesferas , Calcio/farmacología , Colágeno/farmacología , Colágeno Tipo III , Fibroblastos , Materiales Biocompatibles
6.
Cancers (Basel) ; 14(19)2022 Sep 27.
Artículo en Inglés | MEDLINE | ID: mdl-36230620

RESUMEN

The clinical application of immune checkpoint inhibitors represents a breakthrough progress in the treatment of metastasized melanoma and other tumor entities. In the present study, it was hypothesized that oligonucleotides (ODNs), known as modulators of the immune response, have an impact on the endogenous expression of checkpoint molecules, namely PD-L1 and PD-L2 (PD-L1/2). IFNγ-stimulated melanoma cells (A375, SK-Mel-28) were treated with different synthetically manufactured oligonucleotides which differed in sequence, length and backbone composition. It was found that a variety of different ODN sequences significantly suppressed PD-L1/2 expression. This effect was dependent on length and phosphorothioate (PTO) backbone. In particular, a sequence containing solely guanines (nCpG-6-PTO) was highly effective in downregulating PD-L1/2 at the protein, mRNA and promoter levels. Mechanistically, we gave evidence that ODNs with G-quartet-forming motifs suppress the interferon signaling axis (JAK/STAT/IRF1). Our findings identify a subset of ODNs as interesting pharmacological compounds that could expand the arsenal of targeted therapies to combat the immunological escape of tumor cells.

7.
Int J Mol Sci ; 22(18)2021 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-34576132

RESUMEN

Although anti-cancer properties of the natural compound curcumin have been reported, low absorption and rapid metabolisation limit clinical use. The present study investigated whether irradiation with visible light may enhance the inhibitory effects of low-dosed curcumin on prostate cancer cell growth, proliferation, and metastasis in vitro. DU145 and PC3 cells were incubated with low-dosed curcumin (0.1-0.4 µg/mL) and subsequently irradiated with 1.65 J/cm2 visible light for 5 min. Controls remained untreated and/or non-irradiated. Cell growth, proliferation, apoptosis, adhesion, and chemotaxis were evaluated, as was cell cycle regulating protein expression (CDK, Cyclins), and integrins of the α- and ß-family. Curcumin or light alone did not cause any significant effects on tumor growth, proliferation, or metastasis. However, curcumin combined with light irradiation significantly suppressed tumor growth, adhesion, and migration. Phosphorylation of CDK1 decreased and expression of the counter-receptors cyclin A and B was diminished. Integrin α and ß subtypes were also reduced, compared to controls. Irradiation distinctly enhances the anti-tumor potential of curcumin in vitro and may hold promise in treating prostate cancer.


Asunto(s)
Curcumina/farmacología , Luz , Neoplasias de la Próstata/patología , Apoptosis/efectos de los fármacos , Apoptosis/efectos de la radiación , Adhesión Celular/efectos de los fármacos , Adhesión Celular/efectos de la radiación , Ciclo Celular/efectos de los fármacos , Ciclo Celular/efectos de la radiación , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Movimiento Celular/efectos de la radiación , Proliferación Celular/efectos de los fármacos , Proliferación Celular/efectos de la radiación , Células Clonales , Células Endoteliales de la Vena Umbilical Humana/metabolismo , Humanos , Integrinas/metabolismo , Masculino , Metástasis de la Neoplasia
9.
J Dtsch Dermatol Ges ; 18(12): 1405-1414, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32989835

RESUMEN

BACKGROUND: The aim of this study was to verify the validity of clinical history and oral provocation challenges of patients with NSAID hypersensitivity and to identify safe alternatives. The COX-2 inhibitor etoricoxib, in particular, was studied. PATIENTS AND METHODS: In all, 104 patients with confirmed diagnoses of NSAID hypersensitivity treated at the Department of Dermatology, Frankfurt University Hospital, Germany between 2004 and 2012 were retrospectively studied. RESULTS: The medical history and hypersensitivity symptoms during oral provocation testing (OPT) largely coincided and were mostly mild to moderate. Acetylsalicylic acid (ASA) was the most frequent trigger both anamnestically (27.9 %) and during OPT (47.8 %). Etoricoxib caused the fewest reactions during OPT (4.2 %). Acetaminophen led to reactions in only 6.7 % of the cases studied although it was named more often in clinical histories (14 %). CONCLUSIONS: OPT should be the aim whenever possible as most symptoms are mild to moderate. To distinguish between selective and cross-hypersensitivity reactions, ASA should be part of the test protocol. Furthermore, the findings of this study indicate that etoricoxib and acetaminophen are safe treatment alternatives in case of NSAID hypersensitivity. However, these drugs should not be administered without prior OPT in an inpatient setting, as severe symptoms can occur.


Asunto(s)
Hipersensibilidad a las Drogas , Preparaciones Farmacéuticas , Antiinflamatorios no Esteroideos/efectos adversos , Hipersensibilidad a las Drogas/diagnóstico , Hipersensibilidad a las Drogas/epidemiología , Hipersensibilidad a las Drogas/etiología , Etoricoxib , Humanos , Estudios Retrospectivos
10.
J Photochem Photobiol B ; 209: 111953, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32653859

RESUMEN

Trachoma is a devastating neglected tropical disease caused by Chlamydia trachomatis and the leading global cause of infectious blindness. Although antibiotic treatment against trachoma is efficient (SAFE strategy), additional affordable therapeutic strategies are of high interest. Water-filtered infrared A and visible light (wIRA/VIS) irradiation has proven to reduce chlamydial infectivity in vitro and ex vivo. The aim of this study was to evaluate whether wIRA/VIS can reduce chlamydial infection load and/or ocular pathology in vivo, in a guinea pig model of inclusion conjunctivitis. Guinea pigs were infected with 1 × 106 inclusion-forming units/eye of Chlamydia caviae via the ocular conjunctiva on day 0. In infected animals, wIRA/VIS irradiation (2100 W/m2) was applied on day 2 (single treatment) and on days 2 and 4 (double treatment) post-infection (pi). wIRA/VIS reduced the clinical pathology score on days 7 and 14 pi and the conjunctival chlamydial load on days 2, 4, 7, and 14 pi in comparison with C. caviae-infected, not irradiated, controls. Furthermore, numbers of chlamydial inclusions were decreased in wIRA/VIS treated C. caviae-infected guinea pigs on day 21 pi compared to C. caviae-infected, non-irradiated, controls. Double treatment with wIRA/VIS (days 2 and 4 pi) was more efficient than a single treatment on day 2 pi. wIRA/VIS treatment did neither induce macroscopic nor histologic changes in ocular tissues. Our results indicate that wIRA/VIS shows promising efficacy to reduce chlamydial infectivity in vivo without causing irradiation related pathologies in the follow-up period. wIRA/VIS irradiation is a promising approach to reduce trachoma transmission and pathology of ocular chlamydial infection.


Asunto(s)
Chlamydia/aislamiento & purificación , Conjuntivitis de Inclusión/radioterapia , Rayos Infrarrojos , Luz , Animales , Recuento de Colonia Microbiana , Conjuntivitis de Inclusión/microbiología , Modelos Animales de Enfermedad , Cobayas
11.
Cancer Manag Res ; 12: 1199-1209, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32110094

RESUMEN

PURPOSE: Although regular water is composed of two hydrogens and one oxygen, referred to as H2O, a small amount of water on this planet contains alternative forms of elements with different molecular weights because of the addition of neutrons. The present study was dedicated to studying the effect of heavy water (D2O), in which the two hydrogens become substituted by deuterium, on the cell physiology of different human cells with particular focus on malignant melanoma cells. METHODS: Cells were cultured in regular medium in which the content of H2O was gradually substituted by D2O or deuterium-depleted water (DDW). Following this, the changes of basic cellular parameters, such as morphology, migration, proliferation, cell cycle, apoptosis and microtubule integrity were examined. RESULTS: It was found that raising the D2O content above the standard levels led to a concentration-dependent decrease in proliferation. Lowering the D2O levels below this level had no effect. Likewise, elevated D2O levels hampered migration. Moreover, cell-cycle analysis showed an increase of sub-G1 cells. Corroboratively, markers for apoptosis were induced (histone-associated DNA fragments, Bax, and PARP). In regard to microtubule integrity, only very high levels of D2O (75%) caused partial filament condensation. CONCLUSION: D2O, although chemically identical with H2O, shows proapoptotic and antiproliferative effects on melanoma cells. These findings give a closer look of this interesting compound.

12.
Cancers (Basel) ; 12(2)2020 Jan 28.
Artículo en Inglés | MEDLINE | ID: mdl-32012894

RESUMEN

Recent documentation shows that a curcumin-induced growth arrest of renal cell carcinoma (RCC) cells can be amplified by visible light. This study was designed to investigate whether this strategy may also contribute to blocking metastatic progression of RCC. Low dosed curcumin (0.2 µg/mL; 0.54 µM) was applied to A498, Caki1, or KTCTL-26 cells for 1 h, followed by exposure to visible light for 5 min (400-550 nm, 5500 lx). Adhesion to human vascular endothelial cells or immobilized collagen was then evaluated. The influence of curcumin on chemotaxis and migration was also investigated, as well as curcumin induced alterations of α and ß integrin expression. Curcumin without light exposure or light exposure without curcumin induced no alterations, whereas curcumin plus light significantly inhibited RCC adhesion, migration, and chemotaxis. This was associated with a distinct reduction of α3, α5, ß1, and ß3 integrins in all cell lines. Separate blocking of each of these integrin subtypes led to significant modification of tumor cell adhesion and chemotactic behavior. Combining low dosed curcumin with light considerably suppressed RCC binding activity and chemotactic movement and was associated with lowered integrin α and ß subtypes. Therefore, curcumin combined with visible light holds promise for inhibiting metastatic processes in RCC.

13.
Cells ; 8(11)2019 10 28.
Artículo en Inglés | MEDLINE | ID: mdl-31661890

RESUMEN

Recent studies have proven that Dimethylfumarate (DMF) has a marked anti-proliferative impact on diverse cancer entities e.g., on malignant melanoma. To explore its anti-tumorigenic potential, we examined the effects of DMF on human colon carcinoma cell lines and the underlying mechanisms of action. Human colon cancer cell line HT-29 and human colorectal carcinoma cell line T84 were treated with or without DMF. Effects of DMF on proliferation, cell cycle progression, and apoptosis were analyzed mainly by Bromodeoxyuridine (BrdU)- and Lactatdehydrogenase (LDH)assays, caspase activation, flowcytometry, immunofluorescence, and immunoblotting. In addition, combinational treatments with radiation and chemotherapy were performed. DMF inhibits cell proliferation in both cell lines. It was shown that DMF induces a cell cycle arrest in G0/G1 phase, which is accompanied by upregulation of p21 and downregulation of cyclin D1 and Cyclin dependent kinase (CDK)4. Furthermore, upregulation of autophagy associated proteins suggests that autophagy is involved. In addition, the activation of apoptotic markers provides evidence that apoptosis is involved. Our results show that DMF supports the action of oxaliplatin in a synergetic manner and failed synergy with radiation. We demonstrated that DMF has distinct antitumorigenic, cell dependent effects on colon cancer cells by arresting cell cycle in G0/G1 phase as well as activating both the autophagic and apoptotic pathways and synergizes with chemotherapy.


Asunto(s)
Neoplasias Colorrectales/tratamiento farmacológico , Dimetilfumarato/farmacología , Apoptosis/efectos de los fármacos , Autofagia/efectos de los fármacos , Ciclo Celular/efectos de los fármacos , Puntos de Control del Ciclo Celular/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Neoplasias Colorrectales/metabolismo , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/metabolismo , Dimetilfumarato/metabolismo , Humanos , Melanoma/metabolismo , Neoplasias Cutáneas/metabolismo , Melanoma Cutáneo Maligno
14.
Cells ; 8(4)2019 04 01.
Artículo en Inglés | MEDLINE | ID: mdl-30939867

RESUMEN

A hallmark of ageing is the redistribution of body fat. Particularly, subcutaneous fat decreases paralleled by a decrease of skin collagen I are typical for age-related skin atrophy. In this paper, we hypothesize that collagen I may be a relevant molecule stimulating the differentiation of adipose-derived stem cells (ASCs) into adipocytes augmenting subcutaneous fat. In this context lipogenesis, adiponectin, and collagen I receptor expression were determined. Freshly isolated ASCs were characterized by stemness-associated surface markers by FACS analysis and then transdifferentiated into adipocytes by specific medium supplements. Lipogenesis was evaluated using Nile Red staining and documented by fluorescence microscopy or quantitatively measured by using a multiwell spectrofluorometer. Expression of adiponectin was measured by real-time RT-PCR and in cell-free supernatants by ELISA, and expression of collagen I receptors was observed by western blot analysis. It was found that supports coated with collagen I promote cell adhesion and lipogenesis of ASCs. Interestingly, a reverse correlation to adiponectin expression was observed. Moreover, we found upregulation of the collagen receptor, discoidin domain-containing receptor 2; receptors of the integrin family were absent or downregulated. These findings indicate that collagen I is able to modulate lipogenesis and adiponectin expression and therefore may contribute to metabolic dysfunctions associated with ageing.


Asunto(s)
Adipocitos/citología , Tejido Adiposo/citología , Colágeno Tipo I/farmacología , Células Madre/metabolismo , Adipocitos/efectos de los fármacos , Adipocitos/metabolismo , Adiponectina/genética , Adiponectina/metabolismo , Adhesión Celular/efectos de los fármacos , Células Cultivadas , Humanos , Integrina alfa2beta1/metabolismo , Lipogénesis/efectos de los fármacos , ARN Mensajero/genética , ARN Mensajero/metabolismo , Receptores de Colágeno/metabolismo , Células Madre/citología , Células Madre/efectos de los fármacos
15.
Indian J Dermatol ; 64(2): 85-89, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30983601

RESUMEN

BACKGROUND: Organotypic tissue-cultured skin equivalents are used for a broad range of applications either as possible substitute for animal tests or for transplantation in patient-centered care. AIMS: In this study, we implemented melanocytes in a tissue-cultured full-thickness skin equivalent, consisting of epidermis and dermis. The versatility of this skin-like model with respect to pigmentation and morphological criteria was tested. MATERIALS AND METHODS: Pigmented skin equivalents were morphologically characterized, and melanogenesis was evaluated after treatment with kojic acid - a tyrosinase inhibitor and forskolin - a well-known activator of the cyclic adenosine 3,5-monophosphate pathway. Pigmentation was measured either by determination of the extinction at 400 nm after melanin extraction with KOH correlated to a melanin standard curve or by reflectance colorimetric analysis, monitoring reflectance of 660 nm and 880 nm emitting diodes. RESULTS: The morphological analysis revealed characteristic epidermal stratification with melanocytes located at the basal layer. Stimulation with forskolin increased the pigmentation, whereas treatment with kojic acid caused bleaching. CONCLUSION: The present study demonstrates that the herein-introduced organotypic tissue-cultured skin equivalent is comparable to the normal human skin and its versatility in tests regarding skin pigmentation. Therefore, this model might help understand diseases with dysfunctional pigmentation such as melasma, vitiligo, and postinflammatory hyperpigmentation.

16.
Artículo en Inglés | MEDLINE | ID: mdl-30984278

RESUMEN

The natural compound curcumin exerts antitumor properties in vitro, but its clinical application is limited due to low bioavailability. Light exposure in skin and skin cancer cells has been shown to improve curcumin bioavailability; thus, the object of this investigation was to determine whether light exposure might also enhance curcumin efficacy in bladder cancer cell lines. RT112, UMUC3, and TCCSUP cells were preincubated with low curcumin concentrations (0.1-0.4 µg/ml) and then exposed to 1.65 J/cm2 visible light for 5 min. Cell growth, cell proliferation, apoptosis, cell cycle progression, and cell cycle regulating proteins along with acetylation of histone H3 and H4 were investigated. Though curcumin alone did not alter cell proliferation or apoptosis, tumor cell growth and proliferation were strongly blocked when curcumin was combined with visible light. Curcumin-light caused the bladder cancer cells to become arrested in different cell phases: G0/G1 for RT112, G2/M for TCCSUP, and G2/M- and S-phase for UMUC3. Proteins of the Cdk-cyclin axis were diminished in RT112 after application of 0.1 and 0.4 µg/ml curcumin. Cell cycling proteins were upregulated in TCCSUP and UMUC3 in the presence of 0.1 µg/ml curcumin-light but were partially downregulated with 0.4 µg/ml curcumin. 0.4 µg/ml (but not 0.1 µg/ml) curcumin-light also evoked late apoptosis in TCCSUP and UMUC3 cells. H3 and H4 acetylation was found in UMUC3 cells treated with 0.4 µg/ml curcumin alone or with 0.1 µg/ml curcumin-light, pointing to an epigenetic mechanism. Light exposure enhanced the antitumor potential of curcumin on bladder cancer cells but by different molecular action modes in the different cell lines. Further studies are necessary to evaluate whether intravesical curcumin application, combined with visible light, might become an innovative tool in combating bladder cancer.

17.
Wound Repair Regen ; 27(5): 450-461, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-30994217

RESUMEN

Impaired wound healing as well as imbalanced cell proliferation and extracellular matrix synthesis and degeneration can cause aberrant scarring. The most severe impacts of such scarring on patients' lives are stigmatization and physical restriction. Although, a broad variety of combinatorial approaches with, e.g., glucocorticoids, chemotherapeutics, and immunomodulators are used, there is still a high recurrence rate of keloids. The aim of this study was to investigate which influence interferon γ (IFN-γ, 1.000-10.000 IU/mL) and/or triamcinolone acetonide (TA, 1 µg/mL) have on proliferation, cell viability, collagen type I synthesis, and cytokine secretion in healthy and keloid fibroblasts. It was shown that mono-treatment with IFN-γ or TA for 2 days induced a severe reduction of the proliferative potential in both cell species. The combinatory treatment (IFN-γ plus TA) of keloid fibroblasts enhanced the anti-proliferative effect of the mono-treatments, whereas no additional anti-proliferative effect was observed in normal fibroblasts. Furthermore, we observed that the combinatory treatment regimen reduced the expression of α-smooth muscle actin (α-SMA), an actin isotype contributing to cell-generated mechanical tension, in keloid fibroblasts. In normal fibroblasts, α-SMA was reduced by the mono-treatment with IFN-γ as well as by the combinatory treatment. The analysis of collagen-type I synthesis revealed that TA did not reduce collagen type I synthesis in normal fibroblasts but in keloid fibroblasts. IFN-γ reduced in both cell species the collagen type I synthesis. The combination of TA and IFN-γ intensified the previously observed collagen type I synthesis reduction in keloid fibroblasts. The herein presented data suggest the combinatory application of IFN-γ and TA as a promising therapy concept for keloids.


Asunto(s)
Fibroblastos/efectos de los fármacos , Glucocorticoides/farmacología , Interferón gamma/farmacología , Queloide/patología , Triamcinolona/farmacología , Cicatrización de Heridas/fisiología , Proliferación Celular/efectos de los fármacos , Células Cultivadas , Colágeno Tipo I/biosíntesis , Glucocorticoides/administración & dosificación , Humanos , Interferón gamma/administración & dosificación , Queloide/tratamiento farmacológico , Triamcinolona/administración & dosificación , Cicatrización de Heridas/efectos de los fármacos
18.
Int J Mol Sci ; 20(6)2019 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-30909499

RESUMEN

The anti-cancer properties of curcumin in vitro have been documented. However, its clinical use is limited due to rapid metabolization. Since irradiation of curcumin has been found to increase its anti-cancer effect on several tumor types, this investigation was designed to determine whether irradiation with visible light may enhance the anti-tumor effects of low-dosed curcumin on renal cell carcinoma (RCC) cell growth and proliferation. A498, Caki1, and KTCTL-26 cells were incubated with curcumin (0.1⁻0.4 µg/mL) and irradiated with 1.65 J/cm² visible light for 5 min. Controls were exposed to curcumin or light alone or remained untreated. Curcumin plus light, but not curcumin or light exposure alone altered growth, proliferation, and apoptosis of all three RCC tumor cell lines. Cells were arrested in the G0/G1 phase of the cell cycle. Phosphorylated (p) CDK1 and pCDK2, along with their counter-receptors Cyclin B and A decreased, whereas p27 increased. Akt-mTOR-signaling was suppressed, the pro-apoptotic protein Bcl-2 became elevated, and the anti-apoptotic protein Bax diminished. H3 acetylation was elevated when cells were treated with curcumin plus light, pointing to an epigenetic mechanism. The present findings substantiate the potential of combining low curcumin concentrations and light as a new therapeutic concept to increase the efficacy of curcumin in RCC.


Asunto(s)
Curcumina/farmacología , Luz , Antineoplásicos/química , Antineoplásicos/farmacología , Apoptosis/efectos de los fármacos , Carcinoma de Células Renales/genética , Carcinoma de Células Renales/metabolismo , Carcinoma de Células Renales/patología , Ciclo Celular/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Proliferación Celular/efectos de la radiación , Supervivencia Celular/efectos de los fármacos , Supervivencia Celular/efectos de la radiación , Curcumina/administración & dosificación , Técnicas de Silenciamiento del Gen , Humanos
19.
Int J Mol Sci ; 20(4)2019 Feb 19.
Artículo en Inglés | MEDLINE | ID: mdl-30791477

RESUMEN

Curcumin-a rhizomal phytochemical from the plant Curcuma longa-is well known to inhibit cell proliferation and to induce apoptosis in a broad range of cell lines. In previous studies we showed that combining low curcumin concentrations and subsequent ultraviolet A radiation (UVA) or VIS irradiation induced anti-proliferative and pro-apoptotic effects. There is still debate whether curcumin induces apoptosis via the extrinsic or the intrinsic pathway. To address this question, we investigated in three epithelial cell lines (HaCaT, A431, A549) whether the death receptors CD95, tumor necrosis factor (TNF)-receptor I and II are involved in apoptosis induced by light and curcumin. Cells were incubated with 0.25⁻0.5 µg/mL curcumin followed by irradiation with 1 J/cm² UVA. This treatment was combined with inhibitors specific for distinct membrane-bound death receptors. After 24 h apoptosis induction was monitored by quantitative determination of cytoplasmic histone-associated-DNA-fragments. Validation of our test system showed that apoptosis induced by CH11 and TNF-α could be completely inhibited by their respective antagonists. Interestingly, apoptosis induced by curcumin/light treatment was reversed by none of the herein examined death receptor antagonists. These results indicate a mechanism of action independent from classical death receptors speaking for intrinsic activation of apoptosis. It could be speculated that a shift in cellular redox balance might prompt the pro-apoptotic processes.


Asunto(s)
Apoptosis/efectos de los fármacos , Apoptosis/efectos de la radiación , Curcumina/farmacología , Luz , Apoptosis/genética , Biomarcadores , Línea Celular Tumoral , Supervivencia Celular/efectos de los fármacos , Supervivencia Celular/efectos de la radiación , Fragmentación del ADN , Proteína Ligando Fas/metabolismo , Humanos , Peróxido de Hidrógeno/farmacología , Luz/efectos adversos , Especificidad de Órganos , Receptores de Muerte Celular/metabolismo , Factor de Necrosis Tumoral alfa/metabolismo , Rayos Ultravioleta
20.
J Int Med Res ; 47(2): 653-661, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30378444

RESUMEN

OBJECTIVE: Frontal fibrosing alopecia (FFA) is an underestimated scarring alopecia. This study aimed to examine epidemiological information, as well as predilection sites, associated diseases, and responses to therapy of patients with FFA. We also aimed to determine whether the extent or duration of disease correlated with the quality of life (QoL). METHODS: Twelve outpatients with FFA for > 2 years were analyzed. The Erlanger atopic score and the Functional Assessment of Non-life-threatening Conditions (FANLTC) for QoL-assessment were used as scoring systems. RESULTS: All patients were women with a mean age of 70.3 years. Most patients did not have any symptoms during their disease progression and no therapy that was used showed any significant effects. FFA was associated with hypothyroidism. There were no correlations between hairline regression, duration of disease, atopic disposition, and QoL. The overall QoL was good. CONCLUSIONS: The present study shows that there is no correlation between the extent of FFA and QoL or atopic predisposition. There is a strong correlation between the incidence of thyroid disease and FFA.


Asunto(s)
Alopecia/epidemiología , Fibrosis/epidemiología , Hipotiroidismo/fisiopatología , Calidad de Vida , Anciano , Alopecia/tratamiento farmacológico , Progresión de la Enfermedad , Femenino , Fibrosis/tratamiento farmacológico , Estudios de Seguimiento , Alemania/epidemiología , Humanos , Incidencia , Pronóstico
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