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1.
BMC Med Imaging ; 24(1): 275, 2024 Oct 11.
Artículo en Inglés | MEDLINE | ID: mdl-39394589

RESUMEN

Early screening methods for the thyroid gland include palpation and imaging. Although palpation is relatively simple, its effectiveness in detecting early clinical signs of the thyroid gland may be limited, especially in children, due to the shorter thyroid growth time. Therefore, this constitutes a crucial foundational work. However, accurately determining the location and size of the thyroid gland in children is a challenging task. Accuracy depends on the experience of the ultrasound operator in current clinical practice, leading to subjective results. Even among experts, there is poor agreement on thyroid identification. In addition, the effective use of ultrasound machines also relies on the experience of the ultrasound operator in current clinical practice. In order to extract sufficient texture information from pediatric thyroid ultrasound images while reducing the computational complexity and number of parameters, this paper designs a novel U-Net-based network called DC-Contrast U-Net, which aims to achieve better segmentation performance with lower complexity in medical image segmentation. The results show that compared with other U-Net-related segmentation models, the proposed DC-Contrast U-Net model achieves higher segmentation accuracy while improving the inference speed, making it a promising candidate for deployment in medical edge devices in clinical applications in the future.


Asunto(s)
Glándula Tiroides , Ultrasonografía , Humanos , Ultrasonografía/métodos , Glándula Tiroides/diagnóstico por imagen , Niño , Preescolar , Interpretación de Imagen Asistida por Computador/métodos , Lactante , Femenino , Redes Neurales de la Computación , Adolescente , Masculino , Algoritmos
2.
World J Gastroenterol ; 30(27): 3326-3335, 2024 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-39086750

RESUMEN

BACKGROUND: Endoscopic rubber band ligation (ERBL) is a nonsurgical technique for the treatment of symptomatic internal hemorrhoids but is limited by recurrence and post-procedural pain. AIM: To evaluate satisfaction, long-term recurrence, and post-procedural pain in managing internal hemorrhoids using a combination of polidocanol foam sclerotherapy and ERBL. METHODS: This was a prospective, multicenter, randomized study. A total of 195 consecutive patients diagnosed with grade II-III internal hemorrhoids were enrolled from four tertiary hospitals and randomly divided into a cap-assisted endoscopic polidocanol foam sclerobanding (EFSB) or an ERBL group. All patients were followed-up for 12 months. Symptom-based severity and post-procedural pain were assessed using a hemorrhoid severity score (HSS) and a visual analog scale (VAS). Continuous variables were reported as medians and interquartile range. RESULTS: One hundred and ninety-five patients were enrolled, with 98 in the EFSB group. HSS was lower in the EFSB group than in the ERBL group at 8 weeks [4.0 (3.0-5.0) vs 5.0 (4.0-6.0), P = 0.003] and 12-month [2.0 (1.0-3.0) vs 3.0 (2.0-3.0), P < 0.001] of follow-up. The prolapse recurrence rate was lower in the EFSB group at 12 months (11.2% vs 21.6%, P = 0.038). Multiple linear regression analysis demonstrated that EFSB treatment [B = -0.915, 95% confidence interval (CI): -1.301 to -0.530, P = 0.001] and rubber band number (B = 0.843, 95%CI: 0.595-1.092, P < 0.001) were negatively and independently associated with the VAS score 24 hours post-procedure. The median VAS was lower in the EFSB group than in the ERBL [2.0 (1.0-3.0) vs 3.0 (2.0-4.0), P < 0.001]. CONCLUSION: Cap-assisted EFSB provided long-term satisfaction and effective relief from the recurrence of prolapse and pain 24 hours post-procedure.


Asunto(s)
Hemorroides , Polidocanol , Recurrencia , Soluciones Esclerosantes , Escleroterapia , Humanos , Polidocanol/administración & dosificación , Polidocanol/uso terapéutico , Hemorroides/terapia , Hemorroides/diagnóstico , Hemorroides/cirugía , Persona de Mediana Edad , Femenino , Masculino , Estudios Prospectivos , Escleroterapia/métodos , Resultado del Tratamiento , Ligadura/métodos , Soluciones Esclerosantes/administración & dosificación , Adulto , Anciano , Índice de Severidad de la Enfermedad , Dolor Postoperatorio/etiología , Dolor Postoperatorio/diagnóstico , Satisfacción del Paciente , Dimensión del Dolor , Polietilenglicoles/administración & dosificación , Polietilenglicoles/uso terapéutico
3.
Int J Womens Health ; 16: 1361-1375, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39157002

RESUMEN

Background: Many patients with dysfunctional uterine bleeding (DUB) seek traditional medicine consultations. This study intended to investigate the association of complementary Chinese herbal medicine (CHM) with the surgery rate in patients with DUB in Taiwan. Methods: We enrolled 43,027 patients with newly diagnosed DUB (ICD-9-CM codes 626.8) from the National Health Insurance Research Database in Taiwan during the period of 1997 to 2010. Among them, 38,324 were CHM users, and 4703 did not receive CHM treatment. After performing a 1:1 propensity-score match based on patients' age (per 5 years), comorbidities, conventional drugs, childbirth status, duration from the diagnosis year of DUB and index year, there were an equal number (n=4642) of patients in the CHM cohort and non-CHM cohort. The outcome measurement was the comparison of incidences of surgical events, including hysterectomy and endometrial ablation, in the two cohorts before the end of 2013. Results: CHM users had a lower incidence of surgery than non-CHM users (adjusted HR 0.27, 95% CI: 0.22-0.33). The cumulative incidence of surgery was significantly lower in the CHM cohort during the follow-up period (Log rank test, p < 0.001). A total of 146 patients in the CHM cohort (4.99 per 1000 person-years) and 485 patients in the non-CHM cohort (20.19 per 1000 person-years) received surgery (adjusted HR 0.27, 95% CI: 0.22-0.33). CHM also reduced the risk of surgery in DUB patients with or without comorbidities. Regardless of childbirth status or whether patients took NSAIDs, tranexamic acid or progesterone, fewer patients in the CHM cohort underwent surgery than in the non-CHM cohort. The most commonly prescribed single herb and formula were Yi-Mu-Cao (Herba Leonuri) and Jia-Wei-Xiao-Yao-San, respectively. Conclusion: The real-world data revealed that CHM is associated with a reduced surgery rate in DUB patients. This information may be provided for further clinical investigations and policy-making.

4.
Plast Reconstr Surg Glob Open ; 12(6): e5886, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38859806

RESUMEN

Background: In deep burns, the gold standard of treatment is surgical debridement and coverage, but in hands, this may lead to poor aesthetic and functional results due to the complexity of this anatomical area. Enzymatic debridement (Nexobrid) allows for the preservation of the dermal remnant and reduces the number of skin grafts when compared with surgical excision. The study aimed to analyze the patients with intermediate second-degree or deeper burns in hands who required surgical treatment after Nexobrid and those who avoided it. Methods: A descriptive retrospective study of all patients who underwent Nexobrid following hand burns between May 2015 and April 2020 treated in Vall d'Hebrón University Hospital was conducted. After the enzymatic debridement, the burn unit team determined if the burn required conservative treatment or surgery, based on the characteristics of the wound bed. Results: A total of 202 hands were collected. Most hands included in this study had deep second-degree burns (122; 60.4%). Almost half of the hands underwent surgery (99; 49%), and most had deep second-degree burns (61; 61.62%). During follow-up, 24 hands required surgery for sequelae (11.88%) and 62 did not undergo follow-up (30.69%). In the group that needed sequelae surgery, 21 needed surgery after Nexobrid and three of them were healed with conservative treatment after Nexobrid (P < 0.001). Conclusions: Nexobrid decreases the number of surgical procedures in deep burns of the hand because more conservative attitudes are adopted. Also, it seems to reduce the need of surgery due to burn sequelae.

5.
Ann Plast Surg ; 93(3): 327-330, 2024 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-38775257

RESUMEN

BACKGROUND: The closure of scalp wounds presents with reconstructive challenges due to the poor tissue elasticity. It is not uncommon to require skin grafts for definitive closure, even when large flaps are employed. Herein, we present a novel method for the direct closure of small- to medium-sized wounds defects. It is a modified bilateral rhomboid flap, which enables tension-free closure in many areas of scalp. METHODS: All patients treated with this technique between January 2018 and January 2023 were reviewed. Demographics, complications, and outcomes were reviewed. RESULTS: One hundred forty patients have been operated with this technique. All have been cases of skin tumors. The full flap survival was 97.14%, and they did not present any major local complications, avoiding in all cases the use of skin autografts. Four patients (2.86%) had partial necrosis in the edges of the flap, all managed with topical wound care with good healing and no need of secondary procedures. CONCLUSIONS: This flap is safe and easy to perform when there is skin laxity in the scalp. It can save many skin grafts, simplifying the closure of this area, which can be a first-choice technique on scalp reconstruction.


Asunto(s)
Procedimientos de Cirugía Plástica , Cuero Cabelludo , Neoplasias Cutáneas , Colgajos Quirúrgicos , Humanos , Cuero Cabelludo/cirugía , Masculino , Femenino , Colgajos Quirúrgicos/trasplante , Procedimientos de Cirugía Plástica/métodos , Neoplasias Cutáneas/cirugía , Persona de Mediana Edad , Anciano , Estudios Retrospectivos , Adulto , Trasplante de Piel/métodos , Anciano de 80 o más Años , Neoplasias de Cabeza y Cuello/cirugía , Resultado del Tratamiento
6.
Microsurgery ; 44(5): e31189, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38798132

RESUMEN

BACKGROUND: The pure skin perforator (PSP) flap is gaining popularity for its remarkable thinness. The subdermal dissection technique was recently introduced, allowing for a quicker elevation of a PSP flap. In this report, we present our two-year experience utilizing subdermal dissection for harvesting PSP flaps. METHODS: All patients who had undergone PSP flap reconstruction at our hospital from February 2021 to February 2023 were included. Demographic data, intraoperative variables, flap characteristics, and postoperative outcomes were collected. Surgical planning involved locating the perforator using ultrasound and harvesting the flap using the subdermal dissection technique. RESULTS: A total of 26 PSP flap reconstructions were conducted on 24 patients aged between 15 and 86 years. The flaps were based on perforators issuing from the superficial circumflex iliac artery in 24 cases, and from the descending branch of the lateral circumflex femoral artery in 2 cases. Flap sizes ranged from 3 × 1.5 cm to 19 × 6 cm, with a mean thickness of 3.48 mm. The average time for flap harvest was 131.92 min. Postoperatively, we observed four cases of partial necrosis, 1 total flap loss, and 2 instances of vascular thrombosis at the anastomosis site. The flaps exhibited good pliability without contracture, and no debulking procedures were required during the follow-up period (minimum 6 months, range 6-24; mean 9.4615). CONCLUSION: The subdermal dissection technique is a safe and efficient approach for elevating PSP flaps. Our initial experience with this technique has been encouraging, and it currently serves as our preferred reconstructive option for defects requiring thin reconstruction.


Asunto(s)
Quemaduras , Colgajo Perforante , Procedimientos de Cirugía Plástica , Humanos , Colgajo Perforante/irrigación sanguínea , Colgajo Perforante/trasplante , Adulto , Persona de Mediana Edad , Masculino , Femenino , Anciano , Adolescente , Procedimientos de Cirugía Plástica/métodos , Anciano de 80 o más Años , Adulto Joven , Quemaduras/cirugía , Estudios Retrospectivos , Disección/métodos , Resultado del Tratamiento , Trasplante de Piel/métodos
7.
Cancer Lett ; 591: 216878, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38609001

RESUMEN

Liver metastasis is the most common metastatic occurrence in gastric cancer patients, although the precise mechanism behind it remains unclear. Through a combination of proteomics and quantitative RT-PCR, our study has revealed a significant correlation between the upregulation of myocyte enhancer factor-2D (MEF2D) and both distant metastasis and poor prognosis in gastric cancer patients. In mouse models, we observed that overexpressing or knocking down MEF2D in gastric cancer cells respectively promoted or inhibited liver metastasis. Furthermore, our research has demonstrated that MEF2D regulates the transcriptional activation of H1X by binding to the H1X promoter. This regulation leads to the upregulation of H1X, which, in turn, promotes the in vivo metastasis of gastric cancer cells along with the upregulation of the downstream gene ß-CATENIN. Additionally, we found that the expression of MEF2D and H1X at both mRNA and protein levels can be induced by the inflammatory factor IL-13, and this induction exhibits a time gradient dependence. In human gastric cancer tissues, the expression of IL13RA1, the receptor for IL-13, positively correlates with the expression of MEF2D and H1X. IL13RA1 has been identified as an intermediate receptor through which IL-13 regulates MEF2D. In conclusion, our findings suggest that MEF2D plays a crucial role in promoting liver metastasis of gastric cancer by upregulating H1X and downstream target ß-CATENIN in response to IL-13 stimulation. Targeting MEF2D could therefore be a promising therapeutic strategy for the clinical management of gastric cancer. STATEMENT OF SIGNIFICANCE: MEF2D promotes its transcriptional activation in gastric cancer cells by binding to the H1X promoter and is upregulated by IL-13-IL13RA1, thereby promoting distant metastasis of gastric cancer.


Asunto(s)
Regulación Neoplásica de la Expresión Génica , Interleucina-13 , Neoplasias Hepáticas , Factores de Transcripción MEF2 , Neoplasias Gástricas , Animales , Femenino , Humanos , Masculino , Ratones , beta Catenina/metabolismo , beta Catenina/genética , Línea Celular Tumoral , Interleucina-13/metabolismo , Interleucina-13/genética , Subunidad alfa1 del Receptor de Interleucina-13/genética , Subunidad alfa1 del Receptor de Interleucina-13/metabolismo , Neoplasias Hepáticas/secundario , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/metabolismo , Factores de Transcripción MEF2/genética , Factores de Transcripción MEF2/metabolismo , Ratones Endogámicos BALB C , Ratones Desnudos , Regiones Promotoras Genéticas , Transducción de Señal , Neoplasias Gástricas/patología , Neoplasias Gástricas/genética , Neoplasias Gástricas/metabolismo , Regulación hacia Arriba , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/metabolismo , Proteínas de Unión al ARN/genética , Proteínas de Unión al ARN/metabolismo
8.
World J Pediatr ; 20(10): 1059-1069, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-38526835

RESUMEN

BACKGROUND: Preschooling is a critical time for intervention in children with autism spectrum disorder (ASD); thus, we analyzed brain tissue component volumes (BTCVs) and clinical indicators in preschool children with ASD to identify new biomarkers for early screening. METHODS: Eighty preschool children (3-6 years) with ASD were retrospectively included. The whole-brain myelin content (MyC), white matter (WM), gray matter (GM), cerebrospinal fluid (CSF), and non-WM/GM/MyC/CSF brain component volumes were obtained using synthetic magnetic resonance imaging (SyMRI). Clinical data, such as intelligence scores, autism diagnostic observation schedule-calibrated severity scores, age at first production of single words (AFSW), age at first production of phrases (AFP), and age at walking onset (AWO), were also collected. The correlation between the BTCV and clinical data was evaluated, and the effect of BTCVs on clinical data was assessed by a regression model. RESULTS: WM and GM volumes were positively correlated with intelligence scores (both P < 0.001), but WM and GM did not affect intelligence scores (P = 0.116, P = 0.290). AWO was positively correlated with AFSW and AFP (both P < 0.001). The multivariate linear regression analysis revealed that MyC, AFSW, AFP, and AWO were significantly different (P = 0.005, P < 0.001, P < 0.001). CONCLUSIONS: This study revealed positive correlations between WM and GM volumes and intelligence scores. Whole-brain MyC affected AFSW, AFP, and AWO in preschool children with ASD. Noninvasive quantification of BTCVs via SyMRI revealed a new visualizable and quantifiable biomarker (abnormal MyC) for early ASD screening in preschool children.


Asunto(s)
Trastorno del Espectro Autista , Biomarcadores , Encéfalo , Imagen por Resonancia Magnética , Humanos , Preescolar , Trastorno del Espectro Autista/diagnóstico , Femenino , Masculino , Estudios Retrospectivos , Encéfalo/diagnóstico por imagen , Encéfalo/patología , Niño , Inteligencia , Caminata/fisiología , Pruebas de Inteligencia , Tamaño de los Órganos
10.
Biologics ; 18: 61-78, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38318098

RESUMEN

The p53 tumor suppressor protein plays an important role in physiological and pathological processes. MDM2 and its homolog MDMX are the most important negative regulators of p53. Many studies have shown that MDMX promotes the growth of cancer cells by influencing the regulation of the downstream target gene of tumor suppressor p53. Studies have found that inhibiting the MDMX-p53 interaction can effectively restore the tumor suppressor activity of p53. MDMX has growth-promoting activities without p53 or in the presence of mutant p53. Therefore, it is extremely important to study the function of MDMX in tumorigenesis, progression and prognosis. This article mainly reviews the current research progress and mechanism on MDMX function, summarizes known MDMX inhibitors and provides new ideas for the development of more specific and effective MDMX inhibitors for cancer treatment.

11.
Taiwan J Obstet Gynecol ; 63(1): 90-94, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38216278

RESUMEN

OBJECTIVE: Ovarian clear cell carcinoma has a poor prognosis in comparison with other pathological types of epithelial ovarian carcinoma. It also has relative resistance to first-line platinum-based chemotherapy with a great risk of recurrence. CASE REPORT: We report a case of recurrent ovarian clear cell carcinoma status after left salpingo-oophorectomy (fertility-sparing debulking operation) and six courses of adjuvant chemotherapy (paclitaxel (175 mg/m2)/carboplatin (AUC 6)). However, two years after diagnosis, elevated CA-125 accompanied by an intrapelvic mass was noted. Uterine intramural recurrence was found during the second laparotomy. She was treated with right salpingo-oophorectomy and abdominal hysterectomy combined with systemic chemotherapy administration (paclitaxel (175 mg/m2)/carboplatin (AUC 6)) and maintenance therapy (bevacizumab (7.5 mg/kg)). There was no other recurrence until one and a half years postoperatively, and the patient was tumor free with regular follow-up. CONCLUSION: In young patients with stage I ovarian clear cell carcinoma, fertility-sparing surgery was considered. Most patients will suffer from tumor recurrence, and also intrauterine recurrence rarely happen.


Asunto(s)
Adenocarcinoma de Células Claras , Neoplasias Ováricas , Femenino , Humanos , Neoplasias Ováricas/cirugía , Neoplasias Ováricas/tratamiento farmacológico , Carboplatino , Estadificación de Neoplasias , Recurrencia Local de Neoplasia/patología , Paclitaxel/uso terapéutico , Carcinoma Epitelial de Ovario/tratamiento farmacológico , Adenocarcinoma de Células Claras/cirugía , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico
13.
Int J Gynaecol Obstet ; 164(2): 741-749, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37632160

RESUMEN

OBJECTIVE: To assess whether earlier administration of antibiotic prophylaxis after prelabor rupture of membranes (PROM) at term would decrease the incidence of maternal and neonatal infections. METHODS: This is a retrospective cohort study comparing women with term PROM who were initiated antibiotic prophylaxis within or after 6 h, and within or after 12 h from PROM to delivery during January 2019 to December 2021. Women with term PROM receiving cephalosporin and without contraindications to vaginal delivery or confirmed or suspected infection were included in the study. The primary outcome was puerperal infection, which refers to the reproductive tract infection occurring within 42 days of delivery. The type of pharmacoeconomic evaluation was selected based on the results of compared effectiveness between the early group and the late group. Propensity-score matching (PSM) was used to adjust confounding. Subgroup and sensitivity analyses were used to verify the robustness of results. RESULTS: We enrolled 5353 women with term PROM, including 4331 initiated with antibiotic within 6 h, 1022 after 6 h, 5077 within 12 h, and 276 after 12 h. After PSM, no significant difference was observed in the baseline characteristics of the groups. There was no statistical difference between antibiotic use within 6 h and after 6 h, or within 12 h and after 12 h, in puerperal infection (4.6% vs. 4.3%, P = 0.826; 2.9% vs. 4.6%, P = 0.471, respectively), total maternal infection, neonatal sepsis, and total neonatal infection. Cost-minimization analysis showed there was no significant difference between antibiotic use within 6 h and after 6 h, or within 12 h and after 12 h, in direct medical costs. CONCLUSION: This study showed that there was no statistical difference in the efficacy and economy of antibiotic prophylaxis used within 6-12 h after rupture of membranes versus after 6-12 h in women with term PROM.


Asunto(s)
Rotura Prematura de Membranas Fetales , Infección Puerperal , Embarazo , Recién Nacido , Femenino , Humanos , Profilaxis Antibiótica , Rotura Prematura de Membranas Fetales/tratamiento farmacológico , Estudios Retrospectivos , Antibacterianos/uso terapéutico
14.
Sci Rep ; 13(1): 21431, 2023 12 05.
Artículo en Inglés | MEDLINE | ID: mdl-38052921

RESUMEN

Midurethral sling surgery is the current gold standard worldwide for stress urinary incontinence (SUI) surgery, with over 90% of surgeons worldwide using the midurethral sling for SUI between 2008 and 2018. However, concerns surround mesh-related adverse events associated with the midurethral sling. The decision to use the midurethral sling for surgical treatment has become a challenging one for clinicians, surgeons and patients. We sought to determine the factors for 5-year complications after midurethral sling surgery, to improve the clinical decision-making process. Records were reviewed from a total of 1961 female patients who underwent their first midurethral sling surgery for SUI between 2003 and 2018 at a single teaching hospital in Taiwan. A multivariable Cox proportional hazard model calculated the hazard ratios of risk factors for surgical complications, after adjusting for confounders. Surgical complications (i.e., secondary surgery and urinary retention) occurred in 93 (4.7%) patients within 5 years following the index operations. These patients were more likely to be older, to have a history of menopausal syndrome within 1 year prior to the index operation, a medication history of oral antidiabetic drug use, hormone replacement therapy (HRT), slower average flow rate, and longer voiding time compared with patients without surgical complications. In the multivariate analysis, HRT (adjusted hazard ratio, 1.787; 95% confidence interval, 1.011-3.158, p = 0.04) was significantly associated with surgical complications at 5 years, after adjusting for age, gender, diabetes, menopause syndrome, average flow rate, and sling type. Our findings suggest that a medication history of HRT may be a risk factor associated with surgical complications, especially urinary retention, at 5 years in women undergoing midurethral sling surgery for SUI.


Asunto(s)
Cabestrillo Suburetral , Incontinencia Urinaria de Esfuerzo , Retención Urinaria , Femenino , Humanos , Estudios Retrospectivos , Retención Urinaria/etiología , Cabestrillo Suburetral/efectos adversos , Incontinencia Urinaria de Esfuerzo/etiología , Taiwán/epidemiología , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/cirugía , Factores de Riesgo , Resultado del Tratamiento
15.
Neoplasma ; 70(6): 713-721, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37962863

RESUMEN

Metabolic rewiring of tumor cells leads to an enrichment of lactate in the tumor microenvironment (TME). This lactate-rich environment of solid tumors has been reported to support tumor-infiltrating regulatory T (Treg) cells. Therefore, agents that modify the lactate metabolism of Treg cells have therapeutic potential. Monocarboxylate transporter 1 (MCT1), which Treg cells predominantly express, plays an essential role in the metabolism of tumor-infiltrating Treg cells. In this study, we show that miR-124 directly targets MCT1 and reduces lactate uptake, eventually impairing the immune-suppressive capacity of Treg cells. Particularly, exosomal miR-124 derived from bone marrow mesenchymal stromal cells (BM-MSCs) slows tumor growth and increases response to PD-1 blockade therapy. These data indicate a potential treatment strategy for improving immune checkpoint blockade therapy using miR-124-carried BM-MSCs-derived exosomes.


Asunto(s)
Exosomas , Células Madre Mesenquimatosas , MicroARNs , Neoplasias Ováricas , Humanos , Femenino , Linfocitos T Reguladores , MicroARNs/genética , MicroARNs/metabolismo , Neoplasias Ováricas/terapia , Neoplasias Ováricas/metabolismo , Inmunoterapia , Células Madre Mesenquimatosas/metabolismo , Lactatos/metabolismo , Microambiente Tumoral
16.
Rep Prog Phys ; 87(1)2023 Dec 20.
Artículo en Inglés | MEDLINE | ID: mdl-38029424

RESUMEN

This paper summarizes recent studies identifying key qubit systems in silicon carbide (SiC) for quantum sensing of magnetic, electric fields, and temperature at the nano and microscale. The properties of colour centres in SiC, that can be used for quantum sensing, are reviewed with a focus on paramagnetic colour centres and their spin Hamiltonians describing Zeeman splitting, Stark effect, and hyperfine interactions. These properties are then mapped onto various methods for their initialization, control, and read-out. We then summarised methods used for a spin and charge state control in various colour centres in SiC. These properties and methods are then described in the context of quantum sensing applications in magnetometry, thermometry, and electrometry. Current state-of-the art sensitivities are compiled and approaches to enhance the sensitivity are proposed. The large variety of methods for control and read-out, combined with the ability to scale this material in integrated photonics chips operating in harsh environments, places SiC at the forefront of future quantum sensing technology based on semiconductors.

17.
Sci Rep ; 13(1): 20297, 2023 11 20.
Artículo en Inglés | MEDLINE | ID: mdl-37985857

RESUMEN

To investigate the value of metagenomic next-generation sequencing (mNGS) in acute leukemia (AL) patients with febrile neutropenia (FN). We retrospectively reviewed 37 AL patients with FN and compared the results of mNGS with blood culture (BC) and the clinical features of the mNGS-positive group and the mNGS-negative group. A total of 14 detected pathogens were the final clinical diagnosis, of which 9 strains were detected only by mNGS and 5 strains were detected by both mNGS and BC. The top pathogens were Klebsiella pneumoniae, Pseudomonas aeruginosa and Stenotrophomonas maltophilia. A total of 67.57% (25/37) were bacterial infections, and 2.7% (1/37) were fungal or viral infections. The diagnostic positivity rate of mNGS (25/37, 67.6%) was significantly higher than that of BC (7/37, 18.9%), and the difference was statistically significant (p < 0.05). Then, we explored the clinical distinction between the mNGS-positive group and the mNGS-negative group, and 3 features were filtered, including lymphocyte count (LY), creatinine levels (Cr), and white blood cell count (WBC). Our study demonstrated that early implementation of mNGS can effectively improve the efficacy of pathogen detection in AL patients with FN. The higher diagnostic positivity rate and the ability to detect additional pathogens compared to BC made mNGS a valuable tool in the management of infectious complications in this patient population. Furthermore, the identified clinical features associated with mNGS results provided additional insights for the clinical indication of infection in AL patients with FN.


Asunto(s)
Neutropenia Febril , Leucemia Mieloide Aguda , Humanos , Estudios Retrospectivos , Leucemia Mieloide Aguda/complicaciones , Leucemia Mieloide Aguda/genética , Secuenciación de Nucleótidos de Alto Rendimiento , Metagenómica , Plasma , Neutropenia Febril/diagnóstico , Sensibilidad y Especificidad
18.
Front Endocrinol (Lausanne) ; 14: 1250847, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37711892

RESUMEN

Frozen-thawed embryo transfer (FET) has been a viable alternative to fresh embryo transfer in recent years because of the improvement in vitrification methods. Laboratory-based studies indicate that complex molecular and morphological changes in endometrium during the window of implantation after exogenous hormones with controlled ovarian stimulation may alter the interaction between the embryo and endometrium, leading to a decreased implantation potential. Based on the results obtained from randomized controlled studies, increased pregnancy rates and better perinatal outcomes have been reported following FET. Compared to fresh embryo transfer, fewer preterm deliveries, and reduced incidence of ovarian hyperstimulation syndrome were found after FETs, yet there is a trend of increased pregnancy-related hypertensive diseases in women receiving FET. Despite the increased application of FET, the search for the most optimal priming protocol for the endometrium is still undergoing. Three available FET protocols have been proposed to prepare the endometrium: i) natural cycle (true natural cycle and modified natural cycle) ii) artificial cycle (AC) or hormone replacement treatment cycle iii) mild ovarian stimulation (mild-OS) cycle. Emerging evidence suggests that the optimal timing for FET using warmed blastocyst transfer is the LH surge+6 day, hCG administration+7 day, and the progesterone administration+6 day in the true natural cycle, modified natural cycle, and AC protocol, respectively. Although still controversial, better clinical pregnancy rates and live birth rates have been reported using the natural cycle (true natural cycle/modified natural cycle) compared with the AC protocol. Additionally, a higher early pregnancy loss rate and an increased incidence of gestational hypertension have been found in FETs using the AC protocol because of the lack of a corpus luteum. Although the common clinical practice is to employ luteal phase support (LPS) in natural cycles and mild-OS cycles for FET, the requirement for LPS in these protocols remains equivocal. Recent findings obtained from RCTs do not support the routine application of endometrial receptivity testing to optimize the timing of FET. More RCTs with rigorous methodology are needed to compare different protocols to prime the endometrium for FET, focusing not only on live birth rate, but also on maternal, obstetrical, and neonatal outcomes.


Asunto(s)
Endometrio , Lipopolisacáridos , Recién Nacido , Embarazo , Humanos , Femenino , Tasa de Natalidad , Cuerpo Lúteo , Transferencia de Embrión
19.
Adv Sci (Weinh) ; 10(30): e2303908, 2023 10.
Artículo en Inglés | MEDLINE | ID: mdl-37587833

RESUMEN

The majority of patients with human epidermal growth factor receptor 2 (Her2)-positive gastric cancer develop refractory to Her2-targeted therapy, where upregulation of immune checkpoints plays an essential role. Herein, a recombinant fully human IgG1 bispecific antibody IBI315 targeting both PD-1 and Her2 is developed  and its antitumor efficacy as well as the underlying mechanism is investigated. IBI315 crosslinks the physical interaction between Her2-positive tumor cells and PD-1-positive T cells, resulting in significantly enhanced antitumor effects compared to each parent antibody or their combination, both in vitro and in vivo mouse tumor models reconstituted with human immune cells using patient-derived xenografts and organoids. Moreover, IBI315 treatment also induces the recruitment and activation of immune cells in tumors. Mechanistically, IBI315 triggers gasdermin B (GSDMB)-mediated pyroptosis in tumor cells, leading to the activation and recruiments of T cells. The activated T cells secret IFNγ, enhancing GSDMB expression and establishing a positive feedback loop of T cell activation and tumor cell killing. Notably, GSDMB is found to be elevated in Her2-positive gastric cancer cells, providing a rationale for IBI315's efficacy. IBI315 is supported here as a promising bispecific antibody-based immunotherapy approach for Her2-positive gastric cancer in preclinical studies, broadening the therapeutic landscape of this patient population.


Asunto(s)
Anticuerpos Biespecíficos , Antineoplásicos , Neoplasias Gástricas , Humanos , Ratones , Animales , Neoplasias Gástricas/tratamiento farmacológico , Gasderminas , Piroptosis , Receptor de Muerte Celular Programada 1 , Línea Celular Tumoral , Anticuerpos Biespecíficos/farmacología , Anticuerpos Biespecíficos/uso terapéutico
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