LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 491

Search options

  1. Article ; Online: The Potential Impact of New Drug and Therapeutic Modalities on Drug Resistance to Renal Cell Carcinoma.

    Pinto, Pedro Caetano

    Anticancer research

    2023  Volume 43, Issue 3, Page(s) 983–991

    Abstract: The treatment of advanced renal cell carcinoma has been substantially improved by the introduction of targeted and immune therapies and their respective combinations. Unleashing the activity of the immune system opened a new and successful front in the ... ...

    Abstract The treatment of advanced renal cell carcinoma has been substantially improved by the introduction of targeted and immune therapies and their respective combinations. Unleashing the activity of the immune system opened a new and successful front in the fight against cancers. Despite the benefits, drug resistance phenomena and adverse side effects can compromise efficacy. The development of new modalities of drugs and therapies with properties and mechanisms of action that break away from conventional medicines was expanded in recent years. This perspective discusses the prospects of these innovative and highly potent novel treatments in overcoming much of the current issues surrounding the resistance to approved renal cell carcinoma treatments and the challenges facing their introduction.
    MeSH term(s) Humans ; Carcinoma, Renal Cell/drug therapy ; Drug-Related Side Effects and Adverse Reactions ; Head ; Kidney Neoplasms/drug therapy ; Drug Resistance
    Language English
    Publishing date 2023-02-28
    Publishing country Greece
    Document type Journal Article ; Review
    ZDB-ID 604549-2
    ISSN 1791-7530 ; 0250-7005
    ISSN (online) 1791-7530
    ISSN 0250-7005
    DOI 10.21873/anticanres.16242
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Efficacy and Safety of an Autologous Micrografting Procedure for Management of Striae Distensae in Women.

    Girão, Leonor / Pinto, Pedro

    Dermatology and therapy

    2024  Volume 14, Issue 2, Page(s) 469–488

    Abstract: Introduction: Striae distensae (SD), or stretch marks, are a common skin problem having a psychological impact and cosmetic concern, especially for women, in whom the prevalence is higher than in men. This study assessed the efficacy and safety of a ... ...

    Abstract Introduction: Striae distensae (SD), or stretch marks, are a common skin problem having a psychological impact and cosmetic concern, especially for women, in whom the prevalence is higher than in men. This study assessed the efficacy and safety of a single autologous micrografting treatment (AMT
    Methods: This single-centre study included 10 healthy women between 24 and 65 years of age, with Fitzpatrick-Goldman skin types I-IV, who had visible SD in glutes/thighs. Each subject acted as their own control. The treatment procedure (microneedling + AMT) and the control procedure (no treatment) were performed on contralateral sides of the glutes/thighs, targeting matched and paired SD. Microneedling was carried out using Dermapen
    Results: In the treated area, at 3 months post-procedure compared to pre-procedure, the following changes were observed, all with statistical significance (P ≤ 0.05): (a) significant reductions in skin roughness (Ra, - 15.9%; Rz, - 22.6%), skin luminance (- 2.0%), and blue-green color distribution (- 10.6%); (b) significant increases in skin microcirculation maximum value (+ 240.1%), skin hydration (+ 71.2%), skin elasticity (+ 216.5%), skin density (+ 34.3%), skin thickness (+ 26.0%), and hypodermis thickness (+ 29.9%). Furthermore, for each of the aforementioned parameters, there was a significantly greater improvement observed with the AMT procedure compared with microneedling at 3 months (all P ≤ 0.05).
    Conclusion: The AMT procedure using Rigenera technology resulted in an noticeable improvement in the SD appearance after 3 months in healthy women.
    Language English
    Publishing date 2024-02-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2680284-3
    ISSN 2190-9172 ; 2193-8210
    ISSN (online) 2190-9172
    ISSN 2193-8210
    DOI 10.1007/s13555-023-01096-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: ISOLATED COMMON ILIAC ARTERY ANEURYSM WITH SPECIFIC ANATOMICAL CONSIDERATIONS.

    Sousa, Pedro / Pinto, Pedro

    Portuguese journal of cardiac thoracic and vascular surgery

    2022  Volume 29, Issue 1, Page(s) 69–73

    Abstract: Introduction: Iliac artery aneurysms (IAA) are a rare entity with a prevalence lower than 2% in the general popula- tion involving typically the common iliac artery in 70-90%. Literature describes that bilateral common IAA may be present in ... ...

    Abstract Introduction: Iliac artery aneurysms (IAA) are a rare entity with a prevalence lower than 2% in the general popula- tion involving typically the common iliac artery in 70-90%. Literature describes that bilateral common IAA may be present in approximately 50% of the affected patients.
    Case-report: The authors present an 88 years old male patient with an isolated giant IAA, 84mm maximum diameter, diagnosed following a four-month period of lower abdominal discomfort and pelvic hyperemic mass. The IAA was successfully excluded with an endovascular approach with an Aorto-uni-iliac endograft Endurant II (Medtronic Cardiovascular, Santa Rosa, CA, USA) followed by a femorofemoral right to left bypass.
    Discussion: Asymptomatic IAA are difficult to identify due to their anatomical location deep within the pelvis but once symptomatic they are associated with a high rate of morbidity and mortality. Their management has evolved toward an endovascular first approach over the past decades, nevertheless, the type of operative repair depends on patient anatomy, clinical stability and the presence of other concomitant aneurysms.
    MeSH term(s) Aged, 80 and over ; Aorta, Abdominal/surgery ; Blood Vessel Prosthesis Implantation ; Humans ; Iliac Aneurysm/diagnostic imaging ; Iliac Artery/diagnostic imaging ; Male ; Stents
    Language English
    Publishing date 2022-04-11
    Publishing country Portugal
    Document type Case Reports ; Journal Article
    ISSN 2184-9927
    ISSN 2184-9927
    DOI 10.48729/pjctvs.256
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Bovine Pericardium Treated with Polyethylene Glycol and Ethanol Versus Pericranium for Duraplasty: A Pilot Study in Supratentorial Neurosurgery.

    Rosa, Magno / Parise, Maud / Ferreira-Pinto, Pedro Henrique / Nigri, Flavio

    World neurosurgery

    2024  Volume 183, Page(s) e871–e876

    Abstract: Background: Watertight closure of dura mater after intracranial surgery can avoid cerebrospinal fluid leakage and central nervous system infection and herniation. When primary closure is not possible, the pericranium is the preferential choice. When it ... ...

    Abstract Background: Watertight closure of dura mater after intracranial surgery can avoid cerebrospinal fluid leakage and central nervous system infection and herniation. When primary closure is not possible, the pericranium is the preferential choice. When it is not available, a dural substitute becomes necessary. Bovine pericardium treated with polyethylene glycol and ethanol is herein tested as a dural substitute.
    Methods: A pilot study comparing bovine pericardium with pericranium in supratentorial neurosurgery was performed.
    Results: Twenty patients were initially allocated into a bovine pericardium group (group 1) or a pericranium group (group 2). Three patients from group 1 and 2 from group 2 had a loss of follow-up, being excluded. In the remaining 15 patients, epidemiological analysis demonstrated a male:female ratio of 3:4 and 4:4 for groups 1 and 2. Ages varied from 28 to 68 (Mean = 49.6) in group 1 and 40-80 (Mean = 61.2) in group 2, with a mean difference of 11.68 years (P = 0.09). Two cases of surgical site infection and 1 of hydrocephalus were observed. Although the calculated relative risk for complications was higher in group 1 (Relative Risk = 1.08), Fisher exact test demonstrated no statistically significant difference between groups (P = 1.00). Procedure mean time was 23 minutes and 11 seconds in group 1 versus 27 minutes and 55 seconds in group 2 (P = 0.47). Mean graft area was 13.17 and 6.23 cm
    Conclusions: Bovine pericardium treated with polyethylene glycol and ethanol was comparable to pericranium as a dural substitute. More studies are encouraged to certify our findings.
    MeSH term(s) Humans ; Male ; Cattle ; Animals ; Female ; Pilot Projects ; Neurosurgery ; Ethanol/therapeutic use ; Polyethylene Glycols ; Neurosurgical Procedures/methods ; Dura Mater/surgery ; Postoperative Complications/surgery
    Chemical Substances Ethanol (3K9958V90M) ; Polyethylene Glycols (3WJQ0SDW1A)
    Language English
    Publishing date 2024-01-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2024.01.044
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: On the Performance of Secure Sharing of Classified Threat Intelligence between Multiple Entities.

    Fernandes, Ricardo / Bugla, Sylwia / Pinto, Pedro / Pinto, António

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 2

    Abstract: The sharing of cyberthreat information within a community or group of entities is possible due to solutions such as the Malware Information Sharing Platform (MISP). However, the MISP was considered limited if its information was deemed as classified or ... ...

    Abstract The sharing of cyberthreat information within a community or group of entities is possible due to solutions such as the Malware Information Sharing Platform (MISP). However, the MISP was considered limited if its information was deemed as classified or shared only for a given period of time. A solution using searchable encryption techniques that better control the sharing of information was previously proposed by the same authors. This paper describes a prototype implementation for two key functionalities of the previous solution, considering multiple entities sharing information with each other: the symmetric key generation of a sharing group and the functionality to update a shared index. Moreover, these functionalities are evaluated regarding their performance, and enhancements are proposed to improve the performance of the implementation regarding its execution time. As the main result, the duration of the update process was shortened from around 2922 s to around 302 s, when considering a shared index with 100,000 elements. From the security analysis performed, the implementation can be considered secure, thus confirming the secrecy of the exchanged nonces. The limitations of the current implementation are depicted, and future work is pointed out.
    MeSH term(s) Computer Security ; Algorithms ; Confidentiality ; Information Dissemination
    Language English
    Publishing date 2023-01-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23020914
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Renal Organic Anion Transporters 1 and 3 In Vitro: Gone but Not Forgotten.

    Caetano-Pinto, Pedro / Stahl, Simone H

    International journal of molecular sciences

    2023  Volume 24, Issue 20

    Abstract: Organic anion transporters 1 and 3 (OAT1 and OAT3) play a crucial role in kidney function by regulating the secretion of multiple renally cleared small molecules and toxic metabolic by-products. Assessing the activity of these transporters is essential ... ...

    Abstract Organic anion transporters 1 and 3 (OAT1 and OAT3) play a crucial role in kidney function by regulating the secretion of multiple renally cleared small molecules and toxic metabolic by-products. Assessing the activity of these transporters is essential for drug development purposes as they can significantly impact drug disposition and safety. OAT1 and OAT3 are amongst the most abundant drug transporters expressed in human renal proximal tubules. However, their expression is lost when cells are isolated and cultured in vitro, which is a persistent issue across all human and animal renal proximal tubule cell models, including primary cells and cell lines. Although it is well known that the overall expression of drug transporters is affected in vitro, the underlying reasons for the loss of OAT1 and OAT3 are still not fully understood. Nonetheless, research into the regulatory mechanisms of these transporters has provided insights into the molecular pathways underlying their expression and activity. In this review, we explore the regulatory mechanisms that govern the expression and activity of OAT1 and OAT3 and investigate the physiological changes that proximal tubule cells undergo and that potentially result in the loss of these transporters. A better understanding of the regulation of these transporters could aid in the development of strategies, such as introducing microfluidic conditions or epigenetic modification inhibitors, to improve their expression and activity in vitro and to create more physiologically relevant models. Consequently, this will enable more accurate assessment for drug development and safety applications.
    MeSH term(s) Animals ; Humans ; Organic Anion Transporters, Sodium-Independent/genetics ; Organic Anion Transport Protein 1/genetics ; Organic Anion Transport Protein 1/metabolism ; Kidney/metabolism ; Kidney Tubules, Proximal/metabolism ; Epithelial Cells/metabolism ; Organic Anion Transporters/metabolism
    Chemical Substances Organic Anion Transporters, Sodium-Independent ; Organic Anion Transport Protein 1 ; Organic Anion Transporters
    Language English
    Publishing date 2023-10-21
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms242015419
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Cesarean Scar Pregnancy: A systematic review on expectant management.

    Silva, Beatriz / Viana Pinto, Pedro / Costa, Maria Antónia

    European journal of obstetrics, gynecology, and reproductive biology

    2023  Volume 288, Page(s) 36–43

    Abstract: A Cesarean Scar Pregnancy (CSP) is a variant of uterine ectopic pregnancy defined by full or partial implantation of the gestational sac in the scar of a previous cesarean section. The continuous increase of Cesarean Deliveries is causing a parallel ... ...

    Abstract A Cesarean Scar Pregnancy (CSP) is a variant of uterine ectopic pregnancy defined by full or partial implantation of the gestational sac in the scar of a previous cesarean section. The continuous increase of Cesarean Deliveries is causing a parallel increase in CSP and its complications. Considering its high morbidity, the most usual recommendation has been termination of pregnancy in the first trimester; however, several cases progress to viable births. The aim of this systematic review is to evaluate the outcome of CSP managed expectantly and understand whether sonographic signs could correlate to the outcomes. An online-based search of PubMed and Cochrane Library Databases was used to gather studies including women diagnosed with a CSP who were managed expectantly. The description of all cases was analysed by the authors in order to obtain information for each outcome. 47 studies of different types were retrieved, and the gestational outcome was available in 194 patients. Out of these, 39 patients (20,1%) had a miscarriage and 16 (8,3%) suffered foetal death. 50 patients (25,8%) had a term delivery and 81 (41,8%) patients had a preterm birth, out of which 27 (13,9%) delivered before 34 weeks of gestation. In 102 (52,6%) patients, a hysterectomy was performed. Placenta Accreta Spectrum (PAS) was a common disorder among CSP and was linked to a higher rate of complications such as foetal death, preterm birth, hysterectomy, haemorrhagic morbidity and surgical complications. Some of the analysed articles showed that sonographic signs with specific characteristics, such as type II and III CSP classification, Crossover Sign - 1, "In the niche" implantation and lower myometrial thickness could be related to worse outcomes of CSP. This article provides a good understanding of CSP as an entity that, although rare, presents with a high rate of relevant morbidity. It is also understood that pregnancies with confirmed PAS had an even higher rate of morbidity. Some sonographic signs were shown to predict the prognosis of these pregnancies and further investigation is necessary to validate one or more signs so they can be used for a more reliable counselling of women with CSP.
    MeSH term(s) Pregnancy ; Infant, Newborn ; Humans ; Female ; Cesarean Section/adverse effects ; Premature Birth/etiology ; Cicatrix/etiology ; Watchful Waiting ; Pregnancy, Ectopic/etiology ; Pregnancy Outcome ; Placenta Accreta/etiology ; Fetal Death/etiology ; Retrospective Studies
    Language English
    Publishing date 2023-07-01
    Publishing country Ireland
    Document type Systematic Review ; Journal Article ; Review
    ZDB-ID 190605-7
    ISSN 1872-7654 ; 0301-2115 ; 0028-2243
    ISSN (online) 1872-7654
    ISSN 0301-2115 ; 0028-2243
    DOI 10.1016/j.ejogrb.2023.06.030
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Revisiting the "Great Levelling": The limits of Piketty's Capital and Ideology for understanding the rise of late 20th century inequality.

    Paidipaty, Poornima / Ramos Pinto, Pedro

    The British journal of sociology

    2021  Volume 72, Issue 1, Page(s) 52–68

    MeSH term(s) Humans ; Socioeconomic Factors ; Sociology
    Language English
    Publishing date 2021-03-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 1491378-1
    ISSN 1468-4446 ; 0007-1315
    ISSN (online) 1468-4446
    ISSN 0007-1315
    DOI 10.1111/1468-4446.12840
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Is Subcapital Realignment for Slipped Capital Femoral Epiphysis a Reproducible Technique? Midterm Results.

    Rego, Paulo / Mafra, Inês / Viegas, Rui / Canhoto, Joana / Oliveira, Filipe / Pinto, Pedro

    Clinical orthopaedics and related research

    2024  

    Abstract: Background: The modified Dunn procedure, which is based on the development of an extended retinacular flap containing the blood supply for the femoral head, allows anatomic reestablishment in patients with moderate to severe slipped capital femoral ... ...

    Abstract Background: The modified Dunn procedure, which is based on the development of an extended retinacular flap containing the blood supply for the femoral head, allows anatomic reestablishment in patients with moderate to severe slipped capital femoral epiphysis (SCFE). Some controversy exists regarding the short-term to midterm risk of avascular necrosis (AVN) and other complications resulting from the surgical technique.
    Questions/purposes: (1) What percentage of patients treated with an extended retinacular flap during the modified Dunn procedure for SCFE with a moderate (slip angle from 30° to 60°) or severe slip (slip angle equal or greater than 60°) develop symptomatic AVN, and what percentage underwent further surgery or had other complications? (2) What femoral head-neck alignment and position parameters relative to the greater trochanter are achieved after surgery? (3) Can we identify radiographic signs of osteoarthritis at a minimum of 4 years after surgery?
    Methods: Between January 2006 and December 2018, we treated 61 patients for SCFE. During this time, we generally used the modified Dunn procedure when the slip angle was ≥ 30°. Based on this indication, the modified Dunn procedure was performed in 37 patients (41 hips) during that time period, and those patients were potentially eligible for this retrospective study. Because bilateral hips in the same patient are not statistically independent, for our analyses, we analyzed only the hip with the longer follow-up time. Of those who remained, 11% (4) were lost before the minimum study follow-up of 48 months or had incomplete datasets, leaving 89% (33) for analysis here at a median follow-up of 80 months (range 49 to 208 months). Periacetabular osteotomy or subtrochanteric rotational femoral osteotomy was added under the same anaesthesia time in 33% (11 patients). We added periacetabular osteotomy in 24% (8) when intraoperative anterior instability was present in external rotation. A femoral rotational osteotomy was added in 9% (3) when posterior instability was present in flexion and internal rotation. The mean ± standard deviation age at the time of surgery was 13 ± 1 years, and 33% (11 of 33) of patients were female. The mean slip angle was 51° ± 16º, and 15% (5) of hips had unstable slips, defined as an inability to walk with or without crutches. We documented chronic presentations in 82% (27) of patients, acute and chronic in 12% (4), and acute in 6% (2). The rate of symptomatic AVN was determined by reviewing all radiographs obtained at the latest follow-up interval. Further surgery and other complications were assessed through an electronic medical record review. Radiographic morphologic parameters were measured before surgery and at a minimum follow-up of 4 years by two senior orthopaedic surgeons. Radiographs obtained at the latest follow-up visit were also screened for signs of osteoarthritis by the same surgeons.
    Results: At the latest follow-up, 3% (1 patient) of patients developed symptomatic AVN and underwent further surgery and 3% (1) underwent revision surgery for screw breakage after a high-energy fall. Postoperatively, the alpha angle was restored to 39º ± 6º, the anterior head-neck offset was restored to 8 ± 3 mm, the neck-shaft angle was 136º ± 6º, and the presence of a positive Klein line decreased from 64% (21 hips) to 0% (0 hips). No patients showed radiographic signs of osteoarthritis at the minimum follow-up of 4 years.
    Conclusion: In this series, the modified Dunn procedure in moderate and severe slips was a reproducible procedure, and few patients developed symptomatic AVN or experienced other complications. Hip morphology was restored, but a longer follow-up duration and a detailed analysis of the results from other centers is warranted to assess the possible long-term risk of progression to AVN or osteoarthritis.
    Level of evidence: Level IV, therapeutic study.
    Language English
    Publishing date 2024-01-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80301-7
    ISSN 1528-1132 ; 0009-921X
    ISSN (online) 1528-1132
    ISSN 0009-921X
    DOI 10.1097/CORR.0000000000002948
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Pleural Mesothelioma: A Rapid Evolution of an Indolent Disease.

    Romano, Miguel / Pinto, Pedro / Afonso, Raquel / Fontes, Joana / Ferreira, Manuel

    Cureus

    2023  Volume 15, Issue 1, Page(s) e33965

    Abstract: Mesothelioma is a rare and insidious neoplasm and is characterized by its highly malignant and aggressive nature. The most common etiology is asbestos exposure, but there are some reports without known asbestos exposure and other factors leading to ... ...

    Abstract Mesothelioma is a rare and insidious neoplasm and is characterized by its highly malignant and aggressive nature. The most common etiology is asbestos exposure, but there are some reports without known asbestos exposure and other factors leading to malignant pleural mesothelioma (MPM). Here, we present the case of a 58-year-old woman with pleuritic chest pain, dyspnea, and fever on presentation to the emergency department (ED), which caused several admissions to the ED in 20 days. The patient was then admitted to the internal medicine department with a diagnosis of community-acquired pneumonia with parapneumonic effusion. During hospitalization, a positron emission tomography (PET) scan, thoracic computed tomography (CT), and pleural biopsy were performed and a final diagnosis of malignant epithelioid pleural mesothelioma was made. Six weeks after the onset of symptoms, the patient presented with an exponential disease progression, dying two months after the diagnosis, despite the initiation of chemotherapy. MPM remains a diagnostic and therapeutic challenge with a very poor prognosis. However, studies show that mesothelioma patients who undergo treatment live at least twice as long as patients who do not receive treatment. This case report is particularly significant because, although it was epithelioid mesothelioma, multiple solid masses were noted on CT and the patient exhibited rapid disease progression, dying a few weeks after starting treatment.
    Language English
    Publishing date 2023-01-19
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.33965
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top