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1.
J Clin Med ; 13(4)2024 Feb 11.
Artigo em Inglês | MEDLINE | ID: mdl-38398353

RESUMO

BACKGROUND: Diet and lifestyle play important roles in preventing and improving chronic diseases, and evaluating behavioral risk factors in these pathologies allows for efficient management. METHODS: A clinical study by screening biochemical parameters and pulmonary function was carried out to evaluate behavioral risk factors in obstructive pulmonary disease associated with metabolic syndrome. RESULTS: Of the total of 70 patients included in the clinical study, 46 were men and 24 were women (χ2 = 3.9, p = 0.168). Forty-eight patients presented at least three met risk criteria associated with the metabolic syndrome (19 women and 29 men). Regarding the assessment of lung function, only 7 of the patients presented normal spirometry values (χ2 = 75.28, p < 0.001), and the other 63 patients presented with ventilatory dysfunction; most (over 80%) declared that they were smokers or had smoked in the past (χ2 = 5.185, p = 0.075). In terms of body weight, 45 of the patients are overweight or obese, most of them declaring that they do not consume enough vegetable products, they consume large amounts of foods of animal origin (meat, milk, eggs) but also super processed foods (food products type of junk food), do not hydrate properly, and are predominantly sedentary people (54 of the patients do no physical activity at all; χ2 = 2.12, p = 0.713). CONCLUSION: From the statistical processing of the data, it is noted that insufficient hydration, low consumption of vegetables, increased consumption of hyper-caloric food products rich in additives, sedentary lifestyle, and smoking are the main disruptive behavioral factors that worsen the health status in lung disease associated with the metabolic syndrome. An important conclusion emerging from the study is that the imbalances that aggravate obstructive lung diseases are generated by unhealthy food and an unbalanced lifestyle.

2.
Chirurgia (Bucur) ; 118(5): 513-524, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37965835

RESUMO

Background: This study sought to investigate the diagnostic procedures, treatment modalities, and consequences of anastomotic leakage (AL) in low anterior resection rectal cancer patients. Methods: A retrospective analysis was conducted on 186 patients consecutively admitted and treated in the 1st Department of Surgery in Craiova, between January 2018 and June 2022, all of whom had undergone surgical interventions for adenocarcinoma of the rectum. Among this cohort, 106 patients who had undergone scheduled low and ultralow anterior rectal resections with total mesorectal excision were selected for further analysis. Twenty-four patients were diagnosed with postoperative AL and underwent diverse management strategies based on the severity of their condition. Results: The study revealed an incidence of 22.6% for postoperative AL, with all of them being classified as grade B and C, according to the 2010 International Study Group of Rectal Cancer Classification, which were associated with significant morbidity and mortality. Notably, patients exhibited various comorbidities, including obesity, arterial hypertension, type 2 diabetes mellitus, and kidney failure. The management approach depended on the severity of the clinical presentation and the availability of treatment options. Early diagnosis and conservative management constituted the initial therapeutic strategy for grade B AL, with surgical reintervention or transanal vacuum therapy being used in grade C AL. Conclusions: The incidence and mortality associated with AF following low anterior resections were notably elevated. Grade B AL were successfully managed through conservative treatment, whereas grade C AL required either surgical reintervention for drainage or diversion procedures, or transanal vacuum therapy.


Assuntos
Diabetes Mellitus Tipo 2 , Neoplasias Retais , Humanos , Fístula Anastomótica/diagnóstico , Fístula Anastomótica/etiologia , Fístula Anastomótica/cirurgia , Estudos Retrospectivos , Diabetes Mellitus Tipo 2/complicações , Resultado do Tratamento , Neoplasias Retais/patologia , Reto/cirurgia , Reto/patologia , Anastomose Cirúrgica/efeitos adversos , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/terapia
3.
Curr Health Sci J ; 49(3): 423-428, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38314221

RESUMO

Cancer remains a significant global cause of mortality, irrespective of a country's level of development. Among all cancer types, gastrointestinal cancers claim the highest number of lives annually. This disease predominantly affects individuals in their 6th to 8th decades of life. Unfortunately, diagnoses often occur during advanced stages of the illness, rendering chemotherapy less effective and offering a reserved prognosis. Conventional endoscopy, however, struggles to differentiate lesions based on their histological composition. Consequently, the management of patients largely depends on histopathological examinations, which can be time-consuming. Biopsy results are sometimes delayed, with precious weeks passing, particularly critical for patients with malignant lesions. Moreover, biopsies may yield inconclusive results if not precisely targeted, leading to potential mismanagement, unnecessary resections and burdensome pathology services. This series of cases underscores, as previous studies have, the value of modern endoscopic techniques in determining the appropriate therapeutic approach for each patient, an approach that ensures the highest quality of life.

4.
Rom J Morphol Embryol ; 64(4): 595-601, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38184841

RESUMO

BACKGROUND: Gastrointestinal stromal tumors (GISTs) are rare mesenchymal tumors, mostly located within the stomach. About 30% of GISTs are incidentally diagnosed and as they become symptomatic may be associated with bleeding, bowel obstruction or spontaneous rupture. CASE PRESENTATION: We present the case of a middle-aged patient diagnosed with a giant gastric GIST, which presented for intermittent gastric outlet obstruction symptoms, and emphasize the major imagistic, histopathological, and therapeutic challenges that may be encountered. There are only several cases of gastric exophytic gastric GIST provoking intermittent gastric outlet obstruction. Tumor resection should be adapted to every patient's status, focused on en bloc extraction, with preservation of invaded organs as much as possible.


Assuntos
Obstrução da Saída Gástrica , Tumores do Estroma Gastrointestinal , Obstrução Intestinal , Neoplasias Gástricas , Pessoa de Meia-Idade , Humanos , Tumores do Estroma Gastrointestinal/complicações , Obstrução da Saída Gástrica/etiologia , Ruptura Espontânea , Neoplasias Gástricas/complicações
5.
Rom J Morphol Embryol ; 62(1): 133-149, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34609416

RESUMO

Squamous cell carcinoma (SCC) is the most frequent cancer in oral cavity and its prognosis has exhibited little improvement in the last decades. Although much less common palate SCCs manifests a higher local aggression invading very quickly the adjacent muscles and jawbones, thus being able frequently to lead to dysfunctions in chewing, swallowing, and speech. To elucidate what underlies such local aggression, we investigated the immunohistochemical expression in palate SCCs of Podoplanin (D2-40), Galectin-3 (Gal-3), mammary serine protease inhibitor (Maspin) and minichromosome maintenance complex component 7 (MCM7), markers that are known to be involved in tumor invasiveness. We found a progressive increase in reactivity for D2-40 and MCM7 from the normal epithelium toward dysplastic epithelium and respectively to SCC, which suggests the intervention of these markers in the early stages of squamous cell carcinogenesis in the palate. The highest D2-40, Gal-3 and MCM7 reactivity was observed in basaloid and in poorly differentiated (G3) palate SCCs, while for Maspin the well-differentiated (G1) palate SCCs were the most reactive. The first three markers mentioned above were most intensely expressed at the invasion front, while the Maspin reactivity was low or absent at this level. Statistically, we found significant stratification on localization, grading, muscle invasion, and survival for all investigated markers, but with very high direct correlations between D2-40, Gal-3, and MCM7 immunoreactive score (IRS) values, while between the Maspin and each of the previous markers there were very high inverse correlations. Overall, all these investigate markers proved to be responsible for the local invasiveness and regional lymph node metastasis, thus allowing a prognostic and therapeutic stratification of patients with palate SCCs.


Assuntos
Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Serpinas , Galectina 3 , Humanos , Imuno-Histoquímica , Componente 7 do Complexo de Manutenção de Minicromossomo , Palato , Inibidores de Serina Proteinase
6.
Exp Ther Med ; 21(6): 608, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33936265

RESUMO

Tuberculosis (TB) remains a public health burden, after many years at attempts for its eradication. Vitamin D (VD) status has been suggested to be related to TB susceptibility because it has the ability to regulate multiple axes of the innate and adaptive host immune response. VD mediates cathelicidin (LL-37) synthesis, a cationic bactericidal peptide, through the expression of vitamin D receptor (VDR). Host innate defense mechanisms include autophagy and apoptosis of alveolar macrophages. The present study aimed to assess the relationship between VD status, inflammation and host defense mechanisms before and after two months of first-line anti-TB pharmacotherapy. The study included newly diagnosed individuals with pulmonary TB without co-morbidities (HIV infection, diabetes, cancer) and without VD supplementation or other therapies interfering with VD serum levels. We measured serum levels of 25-hydroxyvitamin D (25-(OH)-D), the major circulating form of vitamin D, VDR, LL-37, beclin-1 (an autophagy marker) and M30 (an apoptosis biomarker) before and after two months of anti-TB treatment. Individuals presented lower levels of 25-(OH)-D before receiving first-line anti-TB treatment (T0) in comparison with its plasmatic levels after two-months of therapy (T2). At T2, patients were divided in two subgroups according the results of sputum-culture conversion. After two-months of therapy, decreased values of LL-37, beclin-1 and M30 were observed in the culture-negative patients compared to the culture-positive patients. Control of anti-TB treatment outcome could be improved by appraisal of VD status and host defense mechanisms such as autophagy and apoptosis.

7.
Rom J Morphol Embryol ; 61(4): 1259-1278, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-34171074

RESUMO

Oral cancer remains an important global health issue and despite recent diagnostic and therapeutic advances, it continues to have an unfavorable prognostic and decreased survival. Although palatal tumors represent one of the rarest locations of oral squamous cell carcinomas (SCCs), they are among the most aggressive local tumors, leaving behind important morpho-functional disabilities. In order to explain such local aggressiveness, the present study aims to investigate the immunohistochemical expression in palate SCCs of some markers known to be involved in the process of tumor invasiveness, such as Wiskott-Aldrich syndrome like (WASL), Claudin-1 (CLDN1), Integrin beta-6 (ITGB6) and c-Mesenchymal to epithelial transition protein (c-Met). We have found here a higher tumor WASL and CLDN1 reactivity in well-differentiated (G1) palate SCCs, and regardless the histological type, degree of differentiation or tumor topography, an overexpression at the invasion front, and in those palate' SCC cases with muscular invasiveness and with lymph node (LN) dissemination. ITGB6 and c-Met had a higher reactivity in moderately differentiated (G2) palate SCCs, especially at the periphery of tumor proliferations, at the invasion front and in those high invasive cases and as well as in those that associated LN dissemination. All four investigated markers were also positive at the level of LN metastatic proliferations. None of the markers could statistically stratify on age group and pain, and on bone and perineural invasion while all of them statistically stratified on survival and grading. We concluded that these markers have a prognostic role allowing the identification of those cases with an unfavorable clinical evolution and decreased survival.


Assuntos
Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Neoplasias Palatinas , Biomarcadores Tumorais , Humanos , Invasividade Neoplásica , Palato , Carcinoma de Células Escamosas de Cabeça e Pescoço
8.
Rom J Morphol Embryol ; 61(3): 769-782, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33817718

RESUMO

Adenoid cystic carcinoma (ACC) is the second most common malignant salivary glands neoplasms with a controversial biological behavior. Even though these tumors grow slowly, they have increased potential for recurrence and distant metastasis. In order to elucidate this behavior, our study aimed to investigate the immunoexpression in such tumors of the most important transcriptional factors [Twist, Snail, Slug, and zinc finger E-box binding homeobox 1 (ZEB1)] involved in the epithelial-mesenchymal transition process. The highest level of expression was recorded for Twist, present in all the investigated cases, followed by the Slug and Snail, while no tumor parenchyma reactivity was noticed for the ZEB1 factor. There were tumor reactivity differences regarding topography, histopathological variant, and nerve and lymph node invasion status. Thus, tumors developed from the intraoral minor salivary glands, with solid pattern, perineural invasion, locally aggressive and with lymph node metastasis were the most reactive. Therefore, these transcription factors could be useful as prognostic biomarkers and efficient therapeutic targets in such salivary malignancies.


Assuntos
Carcinoma Adenoide Cístico , Neoplasias das Glândulas Salivares , Transição Epitelial-Mesenquimal , Humanos , Imuno-Histoquímica , Recidiva Local de Neoplasia , Glândulas Salivares , Fatores de Transcrição da Família Snail , Fatores de Transcrição
9.
Rom J Morphol Embryol ; 61(3): 895-904, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33817731

RESUMO

Chronic palatal and nasopharyngeal inflammations are common lesions in pediatric pathology, with major effects on children's development. The study included 34 cases of chronic tonsillitis and adenoiditis for which we quantified immunohistochemically and analyzed the distribution of inflammatory elements in the follicular, extrafollicular and epithelial compartments, in relation to the composite histological scores and the clinico-epidemiological profile of the lesions. The cases were more frequent under the age of 10, in female patients, coming from urban areas, with the diagnosis of tonsillitis. B-lymphocytes have been associated with follicular areas in tonsillitis and epithelial areas in adenoiditis. In all compartments, T-lymphocytes were more frequently associated with tonsillitis and plasma cells associated with adenoiditis. Macrophages and dendritic cells had a relatively uniform distribution for the three compartments in all cases. The results obtained indicate different inflammatory phenotypes for chronic tonsillitis and adenoiditis, an aspect that may be useful for stratifying patients for optimal therapy.


Assuntos
Nasofaringite , Tonsilite , Linfócitos B , Doença Crônica , Feminino , Humanos , Linfócitos T
10.
Curr Health Sci J ; 46(4): 379-382, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33717512

RESUMO

The involvement of claudins in urothelial carcinogenesis is controversial. In this study, we analyzed Claudin-4 immunoexpression in 50 cases of bladder urothelial carcinomas depending on the main prognostic parameters of the lesions represented by the tumor grade and tumor extension. Claudin-4 immunoexpression scores were significantly higher in high-grade urothelial carcinomas and in tumors with invasion in muscularis propria. The results obtained indicate the involvement of Claudin-4 in the progression of urothelial bladder carcinomas.

11.
Rom J Morphol Embryol ; 60(1): 59-68, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31263828

RESUMO

Currently, tongue squamous cancer appears to be more frequent, especially among adults under the age of 45. Approximately 50% of these patients are diagnosed late, with clinically detectable metastases; the five-year survival rate of patients with loco-regional metastases is less than 60%. In order to explain this behavior, many investigations have been conducted in recent years, most of them focusing on identification of potential prognostic and therapeutic markers involved in the pathogenesis of tongue cancers. Our research follows the same trend, which aims to study the prognostic implications of immunohistochemical (IHC) expression of markers C-X-C chemokine receptor type 4 (CXCR4), matrix metalloproteinase (MMP)-2 and MMP-9 in 54 cases of tongue squamous carcinoma. The cases were selected from the archives of the Laboratory of Pathology, Emergency County Hospital, Craiova, Romania, from the 2015-2017 period. They were immunohistochemically processed using the labeled Streptavidin-Biotin (LSAB) enzyme detection technique, and as a method of evaluating reactions, the IHC score developed by Remmele & Stegner. Reactivity for the investigated markers was recorded in both primary tumors, parenchymal and stromal, and in lymph node metastases, and also in normal or dysplastic mucosa adjacent to tumor lesions. The maximum tumor reactivity was recorded for CXCR4, followed by MMP-9 and MMP-2. In addition, all of these markers were expressed stronger in the invasion front and especially in the lymph node metastatic forms. This immunoprofile would suggest their implication in loco-regional invasion and dissemination processes, allowing the selection of the most aggressive forms of tongue squamous carcinoma.


Assuntos
Carcinoma de Células Escamosas/metabolismo , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/metabolismo , Receptores CXCR4/metabolismo , Neoplasias da Língua/metabolismo , Carcinoma de Células Escamosas/patologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Neoplasias da Língua/patologia
12.
Rom J Morphol Embryol ; 59(3): 839-849, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30534824

RESUMO

Lip cancers account for 10-12% of the total head and neck cancers and, although squamous cell carcinoma is by far the most common lower lip cancer, the basal cell carcinoma (BCC) seems to be more common for the upper lip. Most BCCs have a clinically indolent behavior, but there are also local aggressive and∕or metastatic cases, with the incidence of such cases being estimated at about 1-10% of all cases of BCC. Many of the molecular mechanisms underlying this aggression are still unknown, which is why our study aimed to investigate the potential prognosis of a few markers, such as C-X-C chemokine receptor type 4 (CXCR4), alpha-smooth muscle actin (α-SMA) and Wiskott-Aldrich syndrome like (WASL) in upper lip BCCs. For this purpose, 24 basocellular cancers with this localization have been investigated immunohistochemically, histopathologically belonging to the next varieties: superficial, nodular, micronodular, adenoid cystic, keratotic, sclerodermiform and mixed. Regardless of the histopathological subtype, for all invasive cases we have recorded an increased reactivity of the three markers especially in the invasion front, reactivity also present at the stroma level, especially at the stroma-parenchyma interface. The most intense immunoreactivity was obtained for the micronodular and sclerodermiform subtypes, confirming their biological behavior to be more aggressive than the rest of the investigated strains. All these results confirm the prognostic value of the CXCR4∕α-SMA∕WASL panel in assessing the biological behavior of the upper lip BCC.


Assuntos
Biomarcadores Tumorais/genética , Carcinoma Basocelular/genética , Neoplasias Labiais/genética , Receptores CXCR4/genética , Neoplasias Cutâneas/genética , Proteína Neuronal da Síndrome de Wiskott-Aldrich/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Basocelular/patologia , Feminino , Humanos , Neoplasias Labiais/patologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Neoplasias Cutâneas/patologia
13.
Rom J Morphol Embryol ; 59(3): 917-926, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30534834

RESUMO

Pilomatricoma is a benign skin tumor originating from the matrix cells of the hair follicles. Sometimes, its diagnosis can be difficult, especially in the preauricular region, where in the differential diagnosis, in addition to other dermal and subcutaneous masses, primary and secondary parotid gland tumor lesions must be also considered. A 34-year-old female was referred to our Institution with a right preauricular swelling over 12 months, which enlarged in the last two months. The ultrasonography confirms the origin of the tumoral mass in the skin of the preauricular region and not from the superficial lobe of the right parotid gland. The patient underwent complete tumor excision and the histopathology and immunohistochemical exams confirmed the diagnosis of a conventional pilomatricoma evolving to a late regressive lesion. She was discharged considered as cured and no recurrences were reported within a period of eight months of follow-up. This is the first reported case in the last 30 years, in this location, in the Department of Oral and Maxillofacial Surgery our Institution. Regarding the rarity of these tumors, especially in this location, we must keep in mind to consider a broader differential diagnosis that includes both tumoral and non-tumoral skin lesion and also parotid gland lesions.


Assuntos
Região Parotídea/anormalidades , Pilomatrixoma/diagnóstico , Adulto , Feminino , Humanos , Imuno-Histoquímica , Região Parotídea/patologia , Pilomatrixoma/patologia
14.
Rom J Morphol Embryol ; 58(1): 267-270, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28523330

RESUMO

Aneurysm of the cystic artery is not common, and it is a rare cause of hemobilia. Most of reported cases are pseudoaneurysms resulting from either an inflammatory process in the abdomen or abdominal trauma. We report a healthy individual who developed hemobilia associated with cystic artery aneurysm. Visceral artery aneurysms are rare and can rupture with potentially grave outcome due to excessive bleeding. The patient was managed with cholecystectomy and concomitant aneurysm repair.


Assuntos
Aneurisma/complicações , Fístula Biliar/complicações , Hemobilia/complicações , Artéria Hepática/patologia , Idoso de 80 Anos ou mais , Aneurisma/diagnóstico por imagem , Fístula Biliar/diagnóstico por imagem , Hemobilia/diagnóstico por imagem , Artéria Hepática/diagnóstico por imagem , Humanos , Tomografia Computadorizada por Raios X
15.
Acta Trop ; 167: 191-195, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28041999

RESUMO

Domestic and wild pigs, as intermediate hosts, can harbor tissue cysts of three Sarcocystis species namely S. miescheriana, S. suihominis and S. porcifelis. Out of them, S. suihominis is zoonotic. Romania is a country with high consumption of raw and/or undercooked traditional pork products. This fact may greatly favor the acquiring of the zoonotic Sarcocystis infections by humans, as definitive host. Based on this consideration and in order to investigate the occurrence and public health significance of Sarcocystis spp. in two western counties (Caras-Severin and Timis) of Romania, a total of 165 heart samples from hunted wild boars (Sus scrofa, n=101) and home slaughtered domestic pigs (Sus scrofa domesticus, n=64) were screened using microscopic fresh examination and molecular methods. Microscopic examination revealed the presence of sarcocysts in 60.4% of wild boars, and 23.4% of domestic pigs. Genetic characterization of isolates through the PCR-RFLP procedure, targeting the 18S rRNA gene, was successfully achieved for all microscopically positive samples, indicating the presence of a single species, S. miescheriana, in both hosts. The identity of 13 selected S. miescheriana isolates was also confirmed through sequencing. The tested hosts older than 27 months were found to be significantly higher infected (p<0.05) with Sarcocystis than the 6 to ≤27months age group. Although the human infective S. suihominis has not been registered, for a more reliable epidemiological picture, further molecular studies enrolling a larger number of animals and diagnosis on human intestinal Sarcocystis infections are still necessary.


Assuntos
Sarcocystis/isolamento & purificação , Doenças dos Suínos/epidemiologia , Suínos/parasitologia , Animais , Animais Domésticos/parasitologia , Reação em Cadeia da Polimerase , Saúde Pública , Romênia/epidemiologia , Sarcocystis/genética , Sus scrofa/parasitologia , Zoonoses/parasitologia
16.
Rom J Morphol Embryol ; 56(1): 115-24, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25826495

RESUMO

Traumatic brain injuries represent the main cause of death and invalidity all over the world. Persons surviving a severe traumatic brain injury often present long-term disabilities, sensitive and motor deficits, cognitive, vegetative or mental disorders. Brain injuries are directly caused by the traumatic agent, and indirectly caused by the action of cells involved in the restorative process. The main cells involved in the restorative process are microglias and astrocytes. By using an experimental model, we investigated the reaction of these cells in the first week after a severe brain injury, followed by brain laceration. Of the two cell types, the most rapid and intense reaction was held by the macroglias, also known as resident macrophages of the central nervous system. Alongside the activation of local microglias, in the restorative process there were also involved blood monocytes that turned into macrophages. 24 hours after the injury, the number of macrophage cells÷mm² at brain wound level increased 2-4 times, after three days - 10-12 times, and after seven days - over 20 times. The astrocyte reaction was slower, their activation being signaled no sooner than three days from injury, when their number in the perilesional brain parenchyma increased approximately two times, while after seven days - approximately 4-5 times. Both astrocytes and macrophages (microglias), besides their beneficial effects in restoring traumatic brain injuries, may have unfavorable effects upon the nervous cells in the immediate proximity of the injury. Destruction of vascular network by the traumatic agent, and the extremely slow restore of vascularization, partially explain brain neurons death on extend areas.


Assuntos
Lesões Encefálicas/patologia , Encéfalo/patologia , Cicatrização , Animais , Astrócitos/citologia , Modelos Animais de Doenças , Macrófagos/citologia , Macrófagos/metabolismo , Microglia/patologia , Monócitos/citologia , Necrose , Neurônios/metabolismo , Ratos , Ratos Wistar
17.
Rom J Morphol Embryol ; 56(1): 197-205, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25826506

RESUMO

Pharyngeal squamous cell carcinoma is a rare neoplasm, whose incidence increases with age. Computed tomography (CT) imaging is an easy way to explore the pharyngeal region, having the advantage of being able to highlight and characterize the existence of a tumor in this region, and to determine its local extension and lymphatic metastasis. In this group were included a total of 27 patients, who, following the histopathological findings were diagnosed with pharyngeal squamous cell carcinoma and who have previously received a CT scan. CT examination protocol included a native scan and post-intravenous administration of contrast medium, in both the arterial phase and in parenchymal and venous phase. The scan was made with 2 mm thin sections, subsequently were performed coronal and sagittal reconstructions. The examination plan included the thoracic region down to the aperture. The paper tries to establish correlations between the morphological appearance and semiological computed tomography characters of the lesions.


Assuntos
Carcinoma de Células Escamosas/diagnóstico por imagem , Carcinoma de Células Escamosas/patologia , Neoplasias de Cabeça e Pescoço/diagnóstico por imagem , Neoplasias de Cabeça e Pescoço/patologia , Neoplasias Faríngeas/diagnóstico por imagem , Neoplasias Faríngeas/patologia , Tomografia Computadorizada por Raios X , Adulto , Idoso , Diferenciação Celular , Meios de Contraste , Humanos , Metástase Linfática , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Carcinoma de Células Escamosas de Cabeça e Pescoço
18.
J Chem Biol ; 4(3): 109-16, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22287993

RESUMO

Inspired by a recent article by Prinz, suggesting that Hill coefficients, obtained from four parameter logistic fits to dose-response curves, represent a parameter allowing distinction between a general allosteric denaturing process and real single site enzyme inhibition, Hill coefficients of a number of selected dietary polyphenol enzyme inhibitions were compiled from the available literature. From available literature data, it is apparent that the majority of polyphenol enzyme interactions reported lead to enzyme inhibition via allosteric denaturing rather than single site inhibition as judged by their reported Hill coefficients. The results of these searches are presented and their implications discussed leading to the suggestion of a novel hypothesis for polyphenol biological activity termed the insect swarm hypothesis.

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