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1.
ACS Appl Mater Interfaces ; 16(34): 44528-44537, 2024 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-39155662

RESUMO

The high level of accumulation of therapeutic agents in tumors is crucial for cancer treatment. Compared to the passive tumor-targeting effect, active tumor-targeting delivery systems, primarily mediated by peptides with high production costs and reduced circulation time, are highly desired. Platelet-driven technologies have opened new avenues for targeted drug delivery prevalently through a membrane coating strategy that involves intricate manufacturing procedures or the fucoidan-mediated hitchhiking method with limited platelet affinity. Here, a novel type of amphiphilic glycopolymer self-assembled micellar nanoparticle has been developed to adhere to naturally activated platelets in the blood. The simultaneous integration of fucose and sialic acid segments into glycopolymers enables closer mimicry of the structure of P-selectin glycoprotein ligand-1 (PSGL-1), thereby increasing the affinity for activated platelets. It results in the formation of glycopolymeric micelle-platelet hybrids, facilitating targeted drug delivery to tumors. The selective platelet-assisted cellular uptake of docetaxel (DTX)-loaded glycopolymeric micelles leads to lower IC50 values against 4T1 cells than that of free DTX. The directed tumor-targeting effect of activated platelets has significantly improved the tumor accumulation capacity of the glycopolymeric nanoparticles, with up to 21.0% found in tumors within the initial 0.2 h. Additionally, with acid-responsive drug release and inherent antimetastasis properties, the glycopolymeric nanoparticles ensured potent therapeutic efficacy, prolonged survival time, and reduced cardiotoxicity, presenting a new and unexplored strategy for platelet-directed drug delivery to tumors, showing promising prospects in treating localized tumors and preventing tumor metastasis.


Assuntos
Plaquetas , Docetaxel , Micelas , Nanopartículas , Docetaxel/química , Docetaxel/farmacologia , Docetaxel/farmacocinética , Docetaxel/uso terapêutico , Animais , Plaquetas/metabolismo , Plaquetas/efeitos dos fármacos , Nanopartículas/química , Camundongos , Linhagem Celular Tumoral , Antineoplásicos/química , Antineoplásicos/farmacologia , Camundongos Endogâmicos BALB C , Humanos , Feminino , Sistemas de Liberação de Medicamentos , Portadores de Fármacos/química , Neoplasias/tratamento farmacológico , Neoplasias/patologia , Neoplasias/metabolismo
2.
Chemistry ; 30(17): e202304165, 2024 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-38246871

RESUMO

A series of functional glycopolymer nanoparticles with 1,8-naphthalimide motif was designed, synthesized and applied for tumor cell imaging. With the pH-sensitive and aggregation-induced emission (AIE) effect of the 1,8-naphthalimide fluorescent probe, the presence of glucose-based glycopolymers enhanced its water-solubility and biocompatibility. Owing to the dual tumor-targeting effects of the dense glucose part and the boronic ester modification, the obtained glycopolymers showed high affinity to tumor cells, with a much faster staining rate than normal cells, indicating a great potential for diagnosis and treatments of cancers.


Assuntos
Corantes Fluorescentes , Nanopartículas , Naftalimidas , Diagnóstico por Imagem , Glucose
3.
Plast Reconstr Surg ; 153(4): 722e-725e, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-37010464

RESUMO

SUMMARY: Fat redistribution combined with release of the tear trough ligament in transconjunctival lower blepharoplasty is widely performed to correct lower eyelid bags and tear trough deformities, but suturing the released fat in such a narrow, dissected space remains a challenge. The purpose of this study was to introduce a new surgical technique of internal fixation that advances and sutures the pedicled orbital fat firmly to the midcheek through premaxillary and prezygomatic spaces. Twenty-two patients (age range, 22 to 39 years) with predominant orbital fat prolapse and tear trough deformity without noticeable lower eyelid skin laxity were treated with this method, all of whom had impressive correction of the eyelid bags and tear trough deformities and were pleased with the aesthetic results during an average follow-up of 11.8 months (range, 10 to 14 months). No patient had postoperative hematoma, ectropion, or midface numbness. The maneuver of internal fixation of redistributed orbital fat provides a novel and safe approach to correct eyelid bags and tear trough deformities without additional percutaneous sutures in transconjunctival lower eyelid blepharoplasty. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Assuntos
Blefaroplastia , Ectrópio , Lacerações , Humanos , Adulto Jovem , Adulto , Blefaroplastia/métodos , Pálpebras/cirurgia , Tecido Adiposo/transplante , Órbita/cirurgia , Lacerações/cirurgia
4.
Nat Commun ; 14(1): 8289, 2023 Dec 14.
Artigo em Inglês | MEDLINE | ID: mdl-38092790

RESUMO

Mazdutide is a once-weekly glucagon-like peptide-1 (GLP-1) and glucagon receptor dual agonist. We evaluated the efficacy and safety of 24-week treatment of mazdutide up to 6 mg in Chinese overweight adults or adults with obesity, as an interim analysis of a randomised, two-part (low doses up to 6 mg and high dose of 9 mg), double-blind, placebo-controlled phase 2 trial (ClinicalTrials.gov, NCT04904913). Overweight adults (body-mass index [BMI] ≥24 kg/m2) accompanied by hyperphagia and/or at least one obesity-related comorbidity or adults with obesity (BMI ≥ 28 kg/m2) were randomly assigned (3:1:3:1:3:1) to once-weekly mazdutide 3 mg, 4.5 mg, 6 mg or matching placebo at 20 hospitals in China. The primary endpoint was the percentage change from baseline to week 24 in body weight. A total of 248 participants were randomised to mazdutide 3 mg (n = 62), 4.5 mg (n = 63), 6 mg (n = 61) or placebo (n = 62). The mean percentage changes from baseline to week 24 in body weight were -6.7% (SE 0.7) with mazdutide 3 mg, -10.4% (0.7) with 4.5 mg, -11.3% (0.7) with 6 mg and 1.0% (0.7) with placebo, with treatment difference versus placebo ranging from -7.7% to -12.3% (all p < 0.0001). All mazdutide doses were well tolerated and the most common adverse events included diarrhoea, nausea and upper respiratory tract infection. In summary, in Chinese overweight adults or adults with obesity, 24-week treatment with mazdutide up to 6 mg was safe and led to robust and clinically meaningful body weight reduction.


Assuntos
Diabetes Mellitus Tipo 2 , Sobrepeso , Adulto , Humanos , Sobrepeso/complicações , Sobrepeso/tratamento farmacológico , Hipoglicemiantes/uso terapêutico , Diabetes Mellitus Tipo 2/tratamento farmacológico , Obesidade/complicações , Obesidade/tratamento farmacológico , Obesidade/induzido quimicamente , Peso Corporal , Peptídeo 1 Semelhante ao Glucagon/uso terapêutico , Método Duplo-Cego , Resultado do Tratamento
5.
ACS Biomater Sci Eng ; 9(12): 6891-6901, 2023 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-38013423

RESUMO

With the fast development of soft electronics, underwater adhesion has become a highly desired feature for various sensing uses. Currently, most adhesive hydrogels are based on catechol-based structures, such as polydopamine, pyrogallol, and tannic acid, with very limited structural variety. Herein, a new type of glycopolymer-based underwater adhesive hydrogel has been prepared straightforwardly by random copolymerization of acrylic acid, acetyl-protected/unprotected glucose, and methacrylic anhydride in dimethyl sulfoxide (DMSO). By employing a DMSO-water solvent exchange strategy, the underwater adhesion was skillfully induced by the synergetic effects of hydrophobic aggregation and hydrogen bonding, leading to excellent adhesion behaviors on various surfaces, including pig skins, glasses, plastics, and metals, even after 5 days of storage in water. In addition, the underwater adhesive hydrogels with simple and low-cost protected/unprotected carbohydrate compositions showed good mechanical and rheological properties, together with cytocompatibility and antiswelling behavior in water, all of which are beneficial for underwater adhesions. In application as a flexible strain sensor, the adhesive hydrogel exhibited stable and reliable sensing ability for monitoring human motion in real time, suggesting great potential for intelligent equipment design.


Assuntos
Anidridos , Dimetil Sulfóxido , Humanos , Animais , Suínos , Hidrogéis , Água
6.
Ann Plast Surg ; 91(5): 540-546, 2023 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-37823621

RESUMO

BACKGROUND: Soft tissue expansion is a common technique for restoring large skin defects. Fixed-type expanders may be inappropriate for the following reasons: (1) the shapes and sizes of the defects vary in different patients; and (2) the bulged base of the fixed-type expander does not fit the curve of the human body, which may induce complications such as concave deformities or nerve palsy from continuous mechanical compression. The customized expander adjusts better to the shape and the topography of the expansion site compared with the fixed-type expander. It improves expansion efficiency and reduces complications caused by compression. METHODS: Between 2016 and 2022, customized soft tissue expansion was performed in 38 patients with skin lesions, including giant congenital melanocytic nevi and postburn scars. This series of patients included patients with a specific donor site shape that is unsuitable for fixed-type expanders. An expander was customized according to the shape of the donor site and then implanted in the subcutaneous pocket. After the expander reached a sufficient volume, the expander was removed, and the extra expanded skin flap was transferred to resurface the skin lesion. In the follow-up, the outcome and the complications were recorded. RESULTS: All the customized expanders fit not only the dimension but also the topography of the donor site. During expansion, 2 patients experienced leakage of the expander, and 3 patients suffered a skin rupture. In the remaining 33 patients, the expansion was successfully completed, and the expanded flaps restored the skin lesions as designed. The color and texture of the skin flaps remained satisfactory after long-term follow-up. CONCLUSIONS: Unlike fixed-type expanders, our customized expanders make it possible for "accurate" expansion, irrespective of the dimension and topography of the donor area. Customization of the expander helps increase efficiency and reduce complications caused by undue compression.


Assuntos
Procedimentos de Cirurgia Plástica , Dispositivos para Expansão de Tecidos , Humanos , Retalhos Cirúrgicos , Expansão de Tecido/métodos , Transplante de Pele
7.
Int J Biol Macromol ; 253(Pt 4): 126975, 2023 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-37739278

RESUMO

Glycosaminoglycans (GAGs) are naturally existing extracellular components with a variety important biological functions. However, their heterogeneous chemical compositions and the challenges in purification have become the main disadvantages for clinical applications. Thus, various synthetic glycopolymers have been designed to mimic the structures and functions of natural GAGs. In the current study, glycopolymers from structurally simple glucose or N-acetylglucosamine monomers were synthesized, which were further subjected to sulfation of different degrees and grafting onto silica nanoparticles, leading to spherical-shaped nano-structures of uniform diameters. With the successively strengthened multivalent effect, the obtained glycopolymer nanoparticles not only showed excellent effects on promotion of cell proliferation by stabilizing growth factors, but also significantly inhibited tumor metastasis by weakening the adhesion between tumor cells and activated platelets. Among the prepared nanoparticles, S3-PGNAc@Si with N-acetylglucosamine segment and the highest sulfation degree exhibited the strongest bioactivities, which were even close to those of heparin. This work presents a novel approach for structural and functional mimicking of natural GAGs from simple and low-cost monosaccharides, holding great potential for a range of biomedical applications.


Assuntos
Glicosaminoglicanos , Nanopartículas , Glicosaminoglicanos/farmacologia , Glicosaminoglicanos/química , Acetilglucosamina , Heparina/farmacologia , Proliferação de Células , Nanopartículas/química
8.
Br J Dermatol ; 188(1): 64-74, 2023 01 23.
Artigo em Inglês | MEDLINE | ID: mdl-36689509

RESUMO

BACKGROUND: The aetiologies of large-to-giant congenital melanocytic naevi (LGCMN) remain ambiguous. A previous study discovered signatures associated with deficient mismatch repair (dMMR) in patients with LGCMN. However, a screening diagnostic immunohistochemistry (IHC) panel of dMMR in patients with LGCMN has not been performed to date. OBJECTIVES: To identify the MMR status and aetiologies of LGCMN. METHODS: A total of 110 patients with CMN, including 30 giant CMN, 30 large CMN, 30 medium CMN and 20 small CMN, underwent diagnostic IHC (for MSH6, MSH2, PMS2 and MLH1) screening of dMMR. The control group comprised normal skin samples from 20 healthy people. MMR proteins with little effect (MSH3 and PMS1) on the MMR system were stained in all samples. The surgical procedures conducted on each patient were noted because they might alter the behaviour of CMN and confound the results. Binary logistic regression analyses were performed between the phenotypic data and MMR status to identify associations. Whole-exome sequencing was performed on the main naevi, satellite naevi and normal skin tissues of four patients to detect variants. Mutational signature analyses were conducted to explore the aetiologies of LGCMN. RESULTS: dMMR was detected in 37% (11 of 30) of giant, 23% (7 of 30) of large and 7% (2 of 30) of medium CMNs, but were not identified in small CMNs or normal skin tissues. Moreover, multiple LGCMNs had a much higher dMMR rate than did single LGCMNs. The regression analyses showed that MMR status was significantly associated with CMN size and the presence of satellites, but was not correlated with age, sex, location, satellite diversity or tissue expansion. Notably, the pattern of protein loss in LGCMN mainly consisted of PMS2 loss. Mutational signature analyses detected dMMR-related signatures in patients with LGCMN. Additionally, rare deleterious germline mutations in DNA repair genes were detected in LGCMN, mainly in MSH6, ATM, RAD50, BRCA1 and ERCC8. These germline mutations were single-patient variants with unknown significance. CONCLUSIONS: dMMR is one of the aetiologies underlying LGCMN, particularly in patients with giant main lesions and multiple satellite lesions. Further studies are necessary to investigate the role of the DNA repair system, particularly MMR, in LGCMN.


Assuntos
Nevo Pigmentado , Neoplasias Cutâneas , Humanos , Reparo de Erro de Pareamento de DNA , Endonuclease PMS2 de Reparo de Erro de Pareamento/genética , Endonuclease PMS2 de Reparo de Erro de Pareamento/metabolismo , Proteínas de Ligação a DNA/genética , Fatores de Transcrição/genética , Enzimas Reparadoras do DNA/genética , Enzimas Reparadoras do DNA/metabolismo
9.
Quant Imaging Med Surg ; 13(1): 37-48, 2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36620150

RESUMO

Background: Adult-onset still's disease (AOSD) and lymphoma are the common causes of fever of unknown origin (FUO) and show some similar clinical symptoms. This study aimed to establish a reliable and easy-to-used scoring model based on clinical information, laboratory characteristics and 18F-fluorodeoxyglucose positron emission tomography/computer tomography (18F-FDG PET/CT) images for the differential diagnosis of these two diseases. Methods: A development cohort including 70 AOSD and 37 lymphoma patients was used to establish a scoring model based on the features of PET/CT images. The scoring model was then validated in a validation cohort of 15 AOSD and 12 lymphoma patients. The features of involved bone marrow, spleen, lymph nodes, and other organs or tissues displayed on PET/CT images were compared. Multiple logistics regression and decision tree analysis were used to establish the scoring model. Results: Four features that could significantly differentiate these two diseases were selected to establish a scoring model discriminating AOSD from lymphoma, including (I) white blood cell (WBC) count ≤10×109/L (1 point); (II) ferritin ≤ upper limit of normal (ULN) (1 point); (III) no abnormal bone marrow metabolism (1 point); (IV) total lesion glycolysistotal (TLGtotal) >9.0 (1 point). After decision tree analysis, it showed that a score ≤1 indicates AOSD. A score ≥3 strongly suggested lymphoma, with a sensitivity of 81.1% and specificity of 90.0% in the development cohort, and a sensitivity of 58.3% and specificity of 100% in the validation cohort. Conclusions: Our scoring model showed good diagnosis performance in distinguishing AOSD from lymphoma.

10.
Aesthetic Plast Surg ; 47(2): 622-630, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-35882647

RESUMO

BACKGROUND: Face-lift surgery is the most crucial and constantly evolving technique of facial rejuvenation. Periodic reviews synthesizing the latest face-lift techniques may help surgeons sharpen their surgical procedures. METHODS: A literature search was conducted of the PubMed databases using the search term "face lift" and "rhytidectomy." Articles reporting rhytidectomy of the forehead/brow, midface, lower face, and neck were included. Sixty-nine articles were selected after independent screening by three of the authors. The Oxford Centre for Evidence-based Medicine scale was used for evaluating evidence level. RESULTS: Of the 69 candidate articles, 10 studies (15%) reported techniques of neck lifting; 10 studies (15%) introduced techniques of endoscopic brow lifting; 7 studies (10%) pertained to brow lifting without endoscopic techniques. The most frequently reported locations of rhytidectomy were the brow/forehead (20%), neck (19%), and face-neck (17%). Additionally, articles regarding Asian face-lifts (14%) have been increasing. The evidence level of the articles was generally low, with only 10 articles assessed as level 1-3 with 59 articles as level 4-5. CONCLUSIONS: Face-lift articles with high-level evidence are still lacking. Prominently, forehead lifting and neck lifting have become upward trends of rhytidectomy in recent years, and the techniques of short-scar face-lift have been more valued. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Ritidoplastia , Humanos , Ritidoplastia/métodos , Estudos Retrospectivos , Cicatriz/prevenção & controle , Endoscopia , Pescoço , Rejuvenescimento
11.
Biomacromolecules ; 24(1): 109-117, 2023 01 09.
Artigo em Inglês | MEDLINE | ID: mdl-36461924

RESUMO

Three-dimensional (3D) printable hydrogels with a shape memory effect have emerged as a new class of 4D printing materials recently and found wide applications in various fields. However, synergistically endowing such materials with good mechanical strength and biocompatibility for biomedical uses remains challenging. In this study, a series of multiresponsive hydrogels have been prepared through a dynamic covalent imine/Diels-Alder network from biocompatible starting materials of modified gelatin and poly(ethylene glycol)-based polymers. By further secondary crosslinking with a hyperbranched triethoxysilane reagent (HPASi) that contains multiple supramolecular hydrogen bonding, the hydrogels presented a strengthened self-healing and temperature-responsive shape memory effect. With the additional features of superior stretchability (elongation at break up to 523%), good cytocompatibility, and 3D printable properties, these multifunctional hydrogels showed great potential for broad biomedical applications.


Assuntos
Gelatina , Hidrogéis , Materiais Biocompatíveis/farmacologia , Hidrogéis/farmacologia , Polímeros , Impressão
12.
J Immunol Res ; 2022: 9024548, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36523350

RESUMO

The nevogenesis of large/giant congenital melanocytic nevus (lgCMN) is a complex biological process including several integral prenatal stages. Limited by ethical concerns, the debate of whether lgCMN develops from the epidermis to the dermis or in the opposite direction remains controversial. With the present study of the accompanying satellite nevi, we tend to support that lgCMN develops from epidermis to dermis. The satellite nevi were divided into 3 groups: big (diameter >10 mm), medium (>5 mm but ≤10 mm), and small (≤5 mm). Hematoxylin and eosin and immunohistochemical staining (SOX10, Ki67, and p16) were performed to compare the nevocyte infiltration depth as well as the positively stained rates among these satellite nevi. Compared to big satellite nevi, less deeply the nevocytes infiltrated the dermis, as well as more cells expressed SOX10 and Ki67 in the epidermis and fewer cells expressed p16 in the dermis of small satellite nevi. Additionally, two specimens were obtained from each of 4 patients who underwent serial resections of lgCMN at an average interval of 1.75 years to examine the histopathological changes. In the present study, satellite nevi of different sizes represent different stages of lgCMN from early to late, deepening our comprehension of the sequential stages of lgCMN nevogenesis. Initially, abnormal nevocytes seeded, proliferated, and spread along the epidermis. At rete ridges that protrude from the papillary dermis within the epidermis, some nevocytes formed nests and gradually penetrated into the dermis. Eventually, the nevocytes infiltrated the dermis and entered a homeostatic state. This study provides new evidence supporting the theory of epidermal-to-dermal nevogenesis in lgCMN.


Assuntos
Nevo Pigmentado , Nevo , Neoplasias Cutâneas , Gravidez , Feminino , Humanos , Antígeno Ki-67 , Nevo Pigmentado/congênito , Nevo Pigmentado/patologia , Neoplasias Cutâneas/patologia
13.
ACS Appl Mater Interfaces ; 14(42): 47461-47471, 2022 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-36240467

RESUMO

As extracellular matrix (ECM) mimetic materials, hydrogels have been widely used for broad biomedical applications. However, with so many physical or chemical cues in the matrix that regulate cell behaviors or functions, it remains challenging to design a customizable hydrogel with the desired properties on demand. In the current study, we aim to establish a circular-patterned hydrogel model with gradient stiffness for screening the most favorable ECM environment for specific cells or certain application purposes. First, six types of hydrogels with a wide stiffness range of 1.2-28.9 kPa were prepared by dynamic covalent cross-linking between gelatin derivatives and oxidized hyaluronic acid. Taking advantage of their instantaneous self-healing property from dynamic chemistry, the hydrogels were further spliced into one whole piece of circular-patterned hydrogel. When rabbit bone marrow mesenchymal stem cells were seeded in the center, the influences of matrix stiffness on the regulation of stem cell adhesion, migration, and differentiation were directly observed and compared under one visual field. In addition, these hydrogels all possessed good biocompatibility, degradability, and injectability, showing great potential for tissue-engineering-related applications.


Assuntos
Ácido Hialurônico , Hidrogéis , Animais , Coelhos , Hidrogéis/farmacologia , Hidrogéis/química , Nicho de Células-Tronco , Gelatina , Engenharia Tecidual
14.
World J Clin Cases ; 10(18): 6032-6038, 2022 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-35949816

RESUMO

BACKGROUND: Hypertrophic scars and keloid treatment is a major problem in plastic surgery. While small keloids can be treated with resection followed by radiotherapy, large keloids require treatment with a tissue expander. Conventional methods increase the need for auxiliary incisions, causing new scar hyperplasia. AIM: To introduce a new method for the treatment of keloids with an expander. METHODS: Between 2018 and 2021, we performed surgeries to treat large keloids in nine patients with a two-stage approach. In the first stage, an intrascar incision was made in the keloid, and a customized expander was implanted under the keloid and the surrounding normal skin. A period of 3-6 mo was allowed for skin expansion. In the second stage, after the initial incision healed, a follow-up surgery was performed to remove the expander, resect the keloid, and repair the expanded skin flap. To accomplish this, an incision was made along the scar boundary to avoid making a new surgical incision and creating new scars. Superficial radiotherapy was then performed postoperatively. RESULTS: Two patients had anterior chest keloids. After treatment, the anterior chest incision was broken repeatedly and then sutured again after debridement. It healed smoothly without scar hyperplasia. Keloids were successfully removed in 7 patients without recurrence. CONCLUSION: This method was performed through a keloid incision and with a custom expander embedded. After full expansion, the keloid was directly resected using a linear suture, which avoids new surgical incisions and scars and can successfully remove large-area keloids. The treatment is effective, providing new insights and strategies for the treatment of similar large-area keloid and hypertrophic scar cases in the future.

15.
Proc Natl Acad Sci U S A ; 119(18): e2200814119, 2022 05 03.
Artigo em Inglês | MEDLINE | ID: mdl-35476519

RESUMO

A convergent approach for the total synthesis of calcipotriol (brand name: Dovonex), a proven vitamin D analog used for the treatment of psoriasis, and medicinally relevant synthetic analogs is described. A complete approach, not wedded to semisynthesis, toward both the A-ring and CD-ring is reported. From a retrosynthetic standpoint, hidden symmetry within the decorated A-ring is disclosed, which allowed for scalable quantities of this advanced intermediate. In addition, a radical retrosynthetic approach is described, which highlights an electrochemical reductive coupling as well as an intramolecular hydrogen atom transfer Giese addition to establish the 6,5-transcarbon skeleton found in the vitamin D family. Finally, a late-stage decarboxylative cross-coupling approach allowed for the facile preparation of various C20-arylated derivatives that show promising biological activity in an initial bioassay.


Assuntos
Psoríase , Vitamina D , Calcitriol/análogos & derivados , Humanos , Psoríase/tratamento farmacológico , Vitaminas
16.
J Immunol Res ; 2021: 8512200, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34912899

RESUMO

Large to giant congenital melanocytic nevus (lgCMN) is a benign cutaneous tumor that develops during embryogenesis. A large number of lgCMN patients are ineligible for surgical treatment; hence, there is an urgent need to develop pharmacological treatments. Clinically, tumorigenesis and progression essentially halt after birth, resulting in the homeostasis of growth arrest and survival. Numerous studies have employed whole-genome or whole-exome sequencing to clarify the etiology of lgCMN; however, transcriptome sequencing of lgCMN is still lacking. Through comprehensive transcriptome analysis, this study elucidated the ongoing regulation and homeostasis of lgCMN and identified potential targets for treatment. Transcriptome sequencing, identification of differentially expressed genes and hub genes, protein-protein network construction, functional enrichment, pathway analysis, and gene annotations were performed in this study. Immunohistochemistry, real-time quantitative PCR, immunocytofluorescence, and cell cycle assays were employed for further validation. The results revealed several intriguing phenomena in lgCMN, including P16-induced cell cycle arrest, antiapoptotic activity, and immune evasion caused by malfunction of tumor antigen processing. The arrested cell cycle in lgCMN is consistent with its phenotype and rare malignant transformation. Antiapoptotic activity and immune evasion might explain how such heterogeneous cells have avoided elimination. Major histocompatibility complex (MHC) class I-mediated tumor antigen processing was the hub pathway that was significantly downregulated in lgCMN, and ITCH, FBXW7, HECW2, and WWP1 were identified as candidate hub genes. In conclusion, our research provides new perspectives for immunotherapy and targeted therapy.


Assuntos
Biomarcadores Tumorais/genética , Pontos de Checagem do Ciclo Celular/genética , Nevo Pigmentado/genética , Neoplasias Cutâneas/genética , Evasão Tumoral/genética , Adolescente , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Biomarcadores Tumorais/análise , Biomarcadores Tumorais/antagonistas & inibidores , Carcinogênese/genética , Carcinogênese/imunologia , Criança , Pré-Escolar , Feminino , Perfilação da Expressão Gênica , Humanos , Imuno-Histoquímica , Imunoterapia/métodos , Lactente , Masculino , Melanócitos , Terapia de Alvo Molecular/métodos , Nevo Pigmentado/imunologia , Nevo Pigmentado/cirurgia , Nevo Pigmentado/terapia , Cultura Primária de Células , Mapas de Interação de Proteínas/genética , Mapas de Interação de Proteínas/imunologia , Pele/patologia , Neoplasias Cutâneas/imunologia , Neoplasias Cutâneas/cirurgia , Neoplasias Cutâneas/terapia , Adulto Jovem
17.
Chempluschem ; 86(11): 1524-1529, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34791814

RESUMO

Hydrogels constructed from natural sources have received increased attention recently, including applications in biomedical fields. They are protein or polysaccharide cross-linked scaffolds that display water retention and are able to recognize host cargos. Their excellent biocompatibility does not always combine with high mechanical strength (up to 136 kPa) and thermostability, making them less useful in biomedical applications. This paper reports biocompatible gelatin hydrogels, double cross-linked via imine and Diels-Alder (DA) dynamic covalent frameworks. They showed integrated advantages of adjustable and durable mechanical strength, good thermal stability, biocompatibility for promoting cell growth and reasonable degradable rate. These hydrogels possess remarkable self-healing property, acid/alkali resistance at 65 °C and good integrity in organic solvents at 130 °C, holding great potential for biomedical applications in the areas such as cartilage regeneration, articular reconstruction or soft robotics.

18.
Arthritis Res Ther ; 23(1): 97, 2021 03 30.
Artigo em Inglês | MEDLINE | ID: mdl-33785060

RESUMO

BACKGROUND: To investigate the potential utility of quantitative parameters obtained by 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in the assessment of disease severity and the occurrence of macrophage activation syndrome (MAS) in adult-onset Still's disease (AOSD). METHODS: Fifty-seven patients with AOSD who underwent pre-treatment 18F-FDG PET/CT were recruited in this study and compared with 60 age- and sex-matched healthy controls. Clinical features and laboratory data were recorded. The systemic score was assessed to determine the disease severity. The maximal standardized uptake value (SUVmax), metabolic lesion volume (MLV), and total lesion glycolysis (TLG) were used to evaluate the involved organs and tissues that abnormally accumulated 18F-FDG. Multivariate analysis was performed to identify the PET/CT-derived risk factors contributing to the AOSD-related MAS, and their diagnostic efficiency was evaluated. RESULTS: High 18F-FDG accumulation was observed in the bone marrow (SUVmax median, 5.10), spleen (SUVmax median, 3.70), and lymph nodes (LNs, SUVmax median, 5.55). The SUVmax of the bone marrow (rho = 0.376, p = 0.004), SUVmax of the spleen (rho = 0.450, p < 0.001), TLGtotal of LNs (rho = 0.386, p = 0.017), and MLVtotal of LNs (rho = 0.391, p = 0.015) were correlated with the systemic score. The SUVmax of the spleen (p = 0.017), TLGtotal of LNs (p = 0.045), and MLVtotal of LNs (p = 0.012) were higher in patients with MAS than in those without MAS. A MLVtotal of LNs > 62.2 (OR 27.375, p = 0.042) was an independent predictive factor for MAS with a sensitivity of 80.0% and a specificity of 93.9%. CONCLUSIONS: The glucose metabolic level of the spleen could be an effective and easy-to-use imaging indicator of disease severity, and MLVtotal of LNs > 62.2 was a strong predictor of MAS occurrence in patients with AOSD.


Assuntos
Síndrome de Ativação Macrofágica , Doença de Still de Início Tardio , Adulto , Fluordesoxiglucose F18 , Humanos , Linfonodos/diagnóstico por imagem , Síndrome de Ativação Macrofágica/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Compostos Radiofarmacêuticos , Estudos Retrospectivos , Doença de Still de Início Tardio/diagnóstico por imagem
19.
Clin Rheumatol ; 39(12): 3723-3732, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32447600

RESUMO

OBJECTIVE: Adult-onset Still's disease (AOSD) is an autoinflammatory disorder leading to multiorgan involvements. We sought to investigate mood status and the health-related quality of life (HRQoL) in these patients. METHODS: In this study, 82 AOSD patients and 82 age- and sex-matched healthy controls were included. Demographic and clinical data of recruited patients were collected. The Hospital Anxiety and Depression Scale (HADS) and Medical Outcomes Survey Short Form-36 (SF-36) were used to evaluate the mood status and quality of life, respectively. Spearman correlation and multivariable linear regression analyses were used to assess the disease-related risk factors associated with anxiety and depression. RESULTS: Forty-four active and thirty-eight relieved patients were enrolled. We found that scores of both HADS anxiety (HADS-A) and depression (HADS-D) subscales in active AOSD were significantly higher than inactive patients, which were significantly higher than controls. Moreover, the HADS-A was positively correlated to the patient's global assessment (PGA), pain, and dosage of prednisone, and the HADS-D was positively correlated to systemic score, PGA, and pain. Female, high dosage of corticosteroids, and PGA more than 50 had a significant association with HADS-A score, while the sore throat and PGA more than 50 had a significant association with HADS-D score. Furthermore, AOSD patients' anxiety and depression had a negative impact on HRQoL. CONCLUSION: Active AOSD patients tended to be anxious and depressed, suffering from poorer HRQoL compared to patients in remission. Therefore, the evaluation of mental health and HRQoL should be included in AOSD patients' long-term management. Key Points • Adult-onset Still's disease (AOSD) is a systemic inflammatory disorder leading to multiorgan involvement. This study was so far the first published research focuses on AOSD patients' mental involvement and health-related quality of life (HRQoL). • Active AOSD patients were more tended to be anxious and depressive and suffered from poorer HRQoL compared to inactive patients. • Patients' anxiety and depression were associated with impaired HRQoL.


Assuntos
Qualidade de Vida , Adulto , Ansiedade/epidemiologia , Transtornos de Ansiedade , Depressão/complicações , Depressão/epidemiologia , Feminino , Humanos , Doença de Still de Início Tardio/complicações
20.
Arthritis Res Ther ; 22(1): 33, 2020 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-32085759

RESUMO

BACKGROUND: Despite expansion in the 2006 Sydney antiphospholipid syndrome (APS) classification criteria to include IgG/IgM anti-ß2-glycoprotein (aß2GPI) antibodies in addition to IgG/IgM anti-cardiolipin antibodies (aCL) and lupus anticoagulant (LAC), some individuals with clinical features of APS remain seronegative (seronegative APS or SNAPS) and are at risk of recurrent thrombosis and pregnancy morbidities. Our aim was to assess the value of "non-criteria" aPL antibodies to detect these SNAPS patients. METHODS: One hundred ninety-two APS patients, 90 SNAPS patients, 193 autoimmune disease controls, and 120 healthy controls were evaluated. Ten antiphospholipid antibodies (aPLs) were tested using commercial kits, including 5 non-criteria aPLs: anti-phosphatidylserine/prothrombin antibodies (aPS/PT) IgG/IgM, aCL IgA, aß2GPI IgA, and anti-ß2GPI Domain 1 (aß2GPI-D1) IgG. RESULTS: Up to 60.9% of the SNAPS and 93.5% of APS patients were detected by at least one non-criteria aPL. aPS/PT IgG had the highest Youden index in classifying APS and SNAPS from controls. aPS/PT IgG and aß2GPI Domain 1 IgG seem to be the most significant risk factors for thrombotic events and pregnancy morbidity, respectively. aPS/PT IgG/IgM and aß2GPI-D1 IgG were detected in some SNAPS patients, while IgA isotypes of aCL/aß2GPI tended to appear together with other biomarkers. The combined analysis showed enhanced diagnostic performance with the inclusion of non-criteria aPLs. CONCLUSIONS: Recognition of SNAPS patients is critical for clinical management and prevention of potential thrombotic and obstetric adverse events. The non-criteria antiphospholipid antibodies help to identify a considerable portion (60.9%) of these patients who otherwise may remain untreated and at clinical risk.


Assuntos
Anticorpos Antifosfolipídeos/imunologia , Síndrome Antifosfolipídica/diagnóstico , Síndrome Antifosfolipídica/imunologia , Adulto , Anticorpos Antifosfolipídeos/sangue , Síndrome Antifosfolipídica/sangue , Povo Asiático , Estudos de Casos e Controles , Estudos de Coortes , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
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