Lymph Glands Research Articles

ATNEC: A multicenter, randomized trial investigating whether axillary treatment can be avoided in patients with T1-3N1M0 breast cancer with no residual cancer in the lymph glands after neoadjuvant chemotherapy.

TPS615 Background: Neoadjuvant chemotherapy (NACT) results in eradication of cancer in the axillary nodes in 40-70% of patients. This raises questions about the benefit of further axillary treatment in patients with no evidence of residual nodal disease (ypN0) post NACT. Methods: Design: ATNEC is a phase 3, randomized (1:1), multi-center UK trial, with embedded economic evaluation. Patients with proven axillary node metastases on needle biopsy receive NACT followed by sentinel node biopsy (SNB). If the sentinel nodes have converted to benign (ypN0), ATNEC randomly assigns patients to axillary treatment (nodal radiotherapy [ART] or axillary nodal clearance [ALND]) vs no further axillary treatment. Stratification: Institution, type of surgery (breast conserving surgery vs mastectomy), receptor status (triple negative vs HER2 positive vs ER positive and/or PR positive and HER2 negative).Inclusion criteria: Age ≥ 18; Male or female; T1-3N1M0 breast cancer at diagnosis (pre-NACT); FNA or core biopsy confirmed axillary nodal metastases at presentation; ER and HER2 status evaluated on primary tumor; Received standard NACT as per local guidelines; Imaging of the axilla to assess response to NACT;Dual tracer SNB post-NACT and at least 3 nodes removed (sentinel nodes and marked node): If a single tracer is used, the patient is eligible if the involved node is marked pre-NACT and at least 3 nodes removed (including the marked node), If axillary node sampling is performed following failed localization of sentinel nodes, patient is eligible if at least 3 nodes removed (including the marked node), If node is not marked, or marked node is not removed, patient is eligible if the histology report shows evidence of down-staging with complete pathological response in at least one node and at least 3 nodes removed; No evidence of nodal metastases post NACT (ypN0). Exclusion criteria: Bilateral invasive breast cancer; SNB prior to NACT; Previous ipsilateral axillary nodal surgery; Previous cancer within last 5 years or concomitant malignancy. Aims: To assess whether omitting further axillary treatment (ALND & ART) for patients with early-stage breast cancer and axillary nodal metastases on needle biopsy - who after NACT have no residual nodal disease on SNB (ypN0) - is non-inferior to axillary treatment in terms of disease-free survival, and reduces lymphoedema at 5 years. Statistical methods: All analyses will be carried out on an intention-to-treat basis to preserve randomization, avoid bias from exclusions and preserve statistical power. Radiotherapy Quality Assurance: Study has in-built radiotherapy QA program that will be coordinated by National Radiotherapy Trials QA (RTTQA) group. Target accrual: 1,900 Status: Recruiting. As of 11-Feb-2022, 39 sites open, 87 patients enrolled, 31 randomized. Clinical trial information: NCT04109079.

Phase I/II trial of RVU120 (SEL120), a CDK8/CDK19 inhibitor in patients with relapsed/refractory metastatic or advanced solid tumors.

e15091 Background: CDK 8 /CDK19 are kinases involved in transcriptional control of embryonic development and cellular homeostasis via the mediator complex. They are also described to maintain tumor dedifferentiation and stem cell properties. A variety of cancer cells hijack the mediator complex and targeting cancer-specific gene transcription via CDK8/19 inhibition has potential for treatment of solid tumors. RVU120 (SEL120) is a selective CDK8/19 inhibitor with preclinical efficacy in hematologic malignancies and a variety of solid tumor types (Rzymski et al. 2017). RVU120 showed strong anticancer activity in preclinical triple-negative breast cancer (TNBC) models, especially in the mesenchymal stem-like (MSL) molecular subtype (Rzymski et al SABCS 2021). Methods: A Phase I/II clinical trial of RVU120 in solid tumors is currently ongoing (NCT05052255). Patients with metastatic or advanced solid tumors without available treatments receive increasing doses of RVU120 as a single oral dose every other day (QOD) for a total of 7 doses on Days 1, 3, 5, 7, 9, 11 and 13, in a 3-week treatment cycle. Primary objectives of the study are safety / tolerability of RVU120 as single agent and determination of the recommended Phase II dose (RP2D) via a 3+3 dose escalation design. Secondary objectives include objective response rate (ORR) (RECIST criteria v1.1) and PK of RVU120. Results: As of 11FEB 2022, 5 pts have been enrolled into the trial: 3 into cohort 1, 75 mg dose, 2 into cohort 2, 100 mg. None of the pts experienced a DLT, SAEs or > Grade 3 AE. Treatment-related AEs were all G1 except for G2 diarrhea and weakness. Cohort 1 patients had at least 1 post-baseline tumor assessment. A 62 YO patient, stage IV esophago-gastric junction carcinoma, metastases to the liver, retroperitoneum, adrenal gland and portocaval lymph nodes, progressing after 4 lines of previous therapy, achieved a SD with a +4% change of target lesion size and progressed in cycle 6. A 65 YO patient, stage IV adenoid cystic carcinoma of the trachea, metastases to the lung and refractory to antiandrogens and radiotherapy, achieved a SD with -4% change of target lesion size after 3 cycles and is currently ongoing in cycle 5. A 43 YO pt stage IV thymic carcinoma, metastases to the lung, mediastinum, pleura and lymph nodes, progressing under cisplatin/etoposide, stopped study drug at the end of cycle 3 for PD in non-target lesions, target lesions increased by 11%. Cohort 2 patients, a 65 YO pt with pancreatic cancer stage IV, metastases to liver and lung, and a 55 YO pt with TNBC stage IV, metastases to the lung, will be evaluated end of cycle 3. Conclusions: In the first dose escalation level with single agent RVU120, no DLTs or ≥G3 AEs were observed in patients with previously progressive solid tumors. Initial assessments in 3 pts demonstrated stable disease in 2 patients. Collection of further data at higher doses is ongoing with 2 patients enrolled at 100 mg. Clinical trial information: NCT05052255.

Full digital workflow in prosthetically guided implantology associated with crestal sinus lift

Resolution of edentulism of 2.4, 2.5, and 2.6 in a 60-year-old woman treated with bisphosphonates per os. CBCT (Planmeca ProMax 3D): good horizontal bone volume not enough vertical on 2.6 IOS (Planmeca Emerald): CAD design of three crowns before virtual implant placement Virtual placement of three implants in 2.4, 2.5, 2.6 positions guided by the virtual crowns previously designed (PlanCad). Regarding area 2.6, having only 4 mm of bone tissue was available in height, it was decided to virtually position the implant (4.2 × 6 MM) 2 mm out of the ridge, so as to arrive with the 6-mm burs, in the osteotomy phase, up to the cortical sinus without going beyond it. The lab .stl file was removed and matching of the intraoral scan stl file with dicom cbct file for the creation of the surgical guide with dental support was performed. The guide was printed using a 3D printer (Planmeca Creo C5). Osteotomies on 2.4 and 2.5 were performed and implants were inserted through the surgical guide. On 2.6 the osteotomy was performed only for 4 mm in depth in order to stop with the burs at the cortical wall of the maxillary sinus and to fracture it by the osteotomes. The implant was inserted manually. Endoral x-ray post-op showed the perfected match between virtual and real surgery. Intraoral scan was performed for an immediate load with a cad-cam zirconia bridge. Full digital workflow in implantology is a reliable technique to perform minimally invasive surgery.

A 3-year Comparative Audit of Thyroid Nodule Ultrasound and Cytology Using TIRADS and Bethesda Scoring Systems

A 3-year Comparative Audit of Thyroid Nodule Ultrasound and Cytology Using TIRADS and Bethesda Scoring Systems

Elaboration and Validation of a Nomogram Based on Axillary Ultrasound and Tumor Clinicopathological Features to Predict Axillary Lymph Node Metastasis in Patients With Breast Cancer.

BackgroundThis study aimed at constructing a nomogram to predict axillary lymph node metastasis (ALNM) based on axillary ultrasound and tumor clinicopathological features.MethodsA retrospective analysis of 281 patients with pathologically confirmed breast cancer was performed between January 2015 and March 2018. All patients were randomly divided into a training cohort (n = 197) and a validation cohort (n = 84). Univariate and multivariable logistic regression analyses were performed to identify the clinically important predictors of ALNM when developin1 g the nomogram. The area under the curve (AUC), calibration plots, and decision curve analysis (DCA) were used to assess the discrimination, calibration, and clinical utility of the nomogram.ResultsIn univariate and multivariate analyses, lymphovascular invasion (LVI), axillary lymph node (ALN) cortex thickness, and an obliterated ALN fatty hilum were identified as independent predictors and integrated to develop a nomogram for predicting ALNM. The nomogram showed favorable sensitivity for ALNM with AUCs of 0.87 (95% confidence interval (CI), 0.81–0.92) and 0.84 (95% CI, 0.73–0.92) in the training and validation cohorts, respectively. The calibration plots of the nomogram showed good agreement between the nomogram prediction and actual ALNM diagnosis (P > 0.05). Decision curve analysis (DCA) revealed the net benefit of the nomogram.ConclusionsThis study developed a nomogram based on three daily available clinical parameters, with good accuracy and clinical utility, which may help the radiologist in decision-making for ultrasound-guided fine needle aspiration cytology/biopsy (US-FNAC/B) according to the nomogram score.

Positive correlation of thyroid nodule cytology with molecular profiling - analysis of over 4000 nodules from multicenter study and systematic literature review

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | ISSN 1479-6848 (online)

ESR1 mediates estrogen-induced feminization of genetic male Chinese soft-shelled turtle†.

Exogenous estrogen have shown their feminization abilities during the specific sex differentiation period in several reptiles. However, the specific regulatory mechanism and downstream regulatory genes of estrogen remain elusive. In the present study, 17β-estradiol (E2), as well as drugs of specific antagonists and/or agonists of estrogen receptors, were employed to figure out the molecular pathway involved in the E2-induced feminization in Chinese soft-shelled turtles, an important aquaculture species in China. E2 treatment led to typical female characteristics in the gonads of ZZ individuals, including thickened outer cortex containing a number of germ cells and degenerated medullary cords, as well as the disappearance of male marker SOX9, and the ectopic expression of ovarian regulator FOXL2 at the embryonic developmental stage 27 and 1month after hatching. The specific ESR1 antagonist or a combination of three estrogen receptor antagonists could block the sex reversal of ZZ individuals induced by estrogen. In addition, specific activation of ESR1 by agonist also led to the feminization of ZZ gonads, which was similar to the effect of estrogen treatment. Furthermore, transcriptome data showed that the expression level of FOXL2 was significantly upregulated, whereas mRNA levels of DMRT1, SOX9, and AMH were downregulated after estrogen treatment. Taken together, our results indicated that E2 induced the feminization of ZZ Chinese soft-shelled turtles via ESR1, and decrease of male genes DMRT1, SOX9, and AMH and increase of ovarian development regulator FOXL2 might be responsible for the initiation of E2-induced feminization.

Implications For Inflammation and Host-Microbiome Interactions In Bowel Dysfunction And Pain After Spinal Cord Injury

Neurogenic bowel (NB) affects up to 60% of people with spinal cord injury (SCI) and is characterized by slow colonic transit, constipation, and chronic abdominal pain. NB rarely resolves and tends to worsen over time, making it a long-term physical and psychological challenge for people with SCI. The knowledge gap surrounding the underlying mechanisms of NB after SCI means that interventions are symptom-focused with only modest gains reported. Identifying the mechanism(s) that initiate and maintain NB after SCI is critically important to the development of evidence-based, novel therapeutic options for bowel dysfunction and pain after SCI. Using a translational spinal contusion mouse model that recapitulates the clinical NB symptoms after SCI, we can begin to tease apart the mechanisms underlying NB. Preliminary analyses using this model indicate a rapid and persistent increased expression of inflammatory mediators, expansion of lymphatic nodules, and disruption of the sterile intestinal mucus bilayer. Without the protective mucus barrier, microbes are observed translocating into the intestinal wall as early as 24 hours. These bacteria are known to initiate local host gene expression changes and may contribute to long term negative health outcomes. Follow-up analyses identified a corresponding upregulation in mRNA transcripts related to bacterial stimulation and defense responses in primary spinal afferents as well as hyperresponsiveness of primary vagal afferents to autologous stool samples. The potentially maladaptive colonic inflammation and host-microbiome interactions provide a biological substrate for NB after SCI with the potential for novel therapeutic interventions targeting these biological processes to prevent or treat NB.

Dual control of dopamine in Drosophila myeloid-like progenitor cell proliferation and regulation of lymph gland growth.

In Drosophila, definitive haematopoiesis takes place in a specialized organ termed "lymph gland". It harbours multi-potent stem-like blood progenitor cells whose development controls overall growth of this haematopoietic tissue and formation of mature blood cells. With respect to its development, neurotransmitters have emerged as potent regulators of blood-progenitor cell development and function. In this study, we extend our understanding of neurotransmitters and show that progenitors are self-sufficient with regard to synthesizing dopamine, a well-established neurotransmitter. These cells also have modules for dopamine sensing through the receptor and transporter. We found that modulating expression of these components in progenitor cells affected lymph gland growth, which suggested growth-promoting function of dopamine in blood-progenitor cells. Cell-cycle analysis of developing lymph glands revealed an unexpected requirement for intracellular dopamine in moderating the progression of early progenitor cells from S to G2 phase of the cell cycle, while activation of dopamine receptor signalling later in development regulated their progression from G2 and entry into mitosis. The dual capacity in which dopamine operated, first intracellularly to coordinate S/G2 transition and later extracellularly in G2/M transition, was critical for the growth of the lymph gland. Overall, the data presented highlight a novel non-canonical use of dopamine in the myeloid system that reveals an uncharacterized function of intracellular dopamine in cell-cycle phasing with outcomes on haematopoietic growth and immunity as well.

Natural SARS-CoV-2 Infection in a Free-Ranging Black-Tailed Marmoset (Mico melanurus) from an Urban Area in Mid-West Brazil

The emergence of spillover pathogens such as SARS-CoV-2 is a risk to vulnerable human populations. We report natural SARS-CoV-2 infection in a free-ranging adult female black-tailed marmoset (Mico melanurus) from an urban area of Cuiabá, Mato Grosso State, Brazil. The animal was found after a motor vehicle collision without previous clinical history. Necropsy confirmed polytrauma. Severe multifocal to coalescent haemorrhage and mild multifocal peribronchial lymphocytic hyperplasia were seen in lung sections. The alveolar septa were multifocally expanded by a few lymphocytes. Mild lymphocytic periportal hepatitis and interstitial nephritis were found. The lymphoid nodules of the large intestine showed marked lymphocytic hyperplasia. Infection by SARS-CoV-2 was established by viral RNA detection in a pool of nasopharyngeal and oropharyngeal swabs and liver samples. Immunohistochemistry detected the viral nucleocapsid protein in sections of lung, liver, spleen, lymph nodes and large intestine, and spike protein antigen in lung tissue. This is the first report of naturally occurring SARS-CoV-2 infection in a New World monkey. Platyrrhine species should be included as potential hosts of natural infection of SARS-CoV-2.

TOPOGRAPHIC RELATIONSHIPS OF MORPHOLOGICALLY HETEROGENEOUS ORGANS IN REACTIONS TO DEPLETED URANIUM

Annotation: Researches of the effect of radionuclides on the human body remain relevant up to date. Their effect of penetrating the body is characterized by involvement of numerous systems of human body. The causal significance of the effects of depleted uranium exposure has not been specifically defined, however, people who live in zones of armed conflict, as well as armed forces personnel, had health problems of "unknown origin", and with remote symptomatic etiology. The risk of possible exposure is also may appear when manufacture of nose spikes for armor piercers and atomic energetics products. In view of these perspectives, depleted uranium, which used in various types of weapons, has been considered as the cause of complaints. Acute uranium intoxication is appeared in polytropic effect that is apparently depended on the resistance of the body. Getting into the internal milieu, depleted uranium exhibits radiation effect of exposure followed by alpha particles radiation. Long-term consequences after oral incorporation of depleted uranium with drinking water are matters of particular interest. The study purpose is defined by assessing of morphofunctional state of the trachea and thyroid gland, united by topographic proximity and different by morphological heterogeneity, upon one month after a single oral incorporation of an aqueous solution of depleted uranium oxides. General histological and histochemical staining methods on thin paraffin slices have been performed for studying on morphological and functional state of the trachea and thyroid gland The results of the morphological and statistical analysis of the trachea wall upon staining with hematoxylin and eosin revealed changes in the structural components that determined deformation of its functionality a month after oral incorporation of an aqueous solution of depleted uranium oxides. Morphological diagnosis was characterized by a change thickness of the epithelial layer, its multi-rowed structure, the cellular composition of the epithelium, and the loss of special organelles. Modifying effect of depleted uranium is also extended to the glandular epithelium with exposure of secretory segments hypertrophy and excretory ducts. There was revealed the diffuse lymphocyte infiltration of the tracheal membranes and formation of lymph nodules. Histochemical analysis of hormone formation in the thyroid gland has demonstrated a change in the ratio of follicles according to the degree of iodization of colloid amino acids with accurate predomination of non-iodized amino acids of irregular shape with accurate smaller diameter against target parameters, with flat or low cubic epithelium, indicating a decrease of gland functionality. The bioeffect of depleted uranium, independently from organ implementation and tissue organization, was prolonged indicating a functional inability.

CHANGES IN LYMPHOID TISSUE IN MICE AT THE INTRODUCTION OF POLYOXIDONIUM IMMUNOPREPARATIONS IN TRICINELLOSIS

Intestinal lymphoid tissue plays an important role in the presentation of antigens to immunocompetent cells and participation in the subsequent immune response. The elements of the system are dynamic, they form and disappear depending on the presence of stress factors of various nature. The article presents the parameters of intestinal lymphoid tissue in mice under the action of polyoxidonium and a complex preparation. The purpose of this work was to evaluate the response of LTASK and the spleen to the introduction of a complex immunopreparation with different content of a specific antigen-extract from Trichinella larvae and polyoxidonium. The study was conducted on 24 outbred white mice, weighing 16–18 g, divided into 3 groups of 7 animals each. Animals of the first control group were injected with saline, animals of the 2nd group were injected with polyoxidonium at a dose of 0.2 mg/kg (0.004 mg/mouse), and the 3rd group received a complex preparation consisting of an immunostimulant at a dose of 0.2 mg/kg. The results of the studies showed that the area of the intestines and the syntopy of the lymphoid tissue did not change, however, the average number of lymphoid nodules in the groups of mice treated with the polyoxidonium preparation was 8.1±0.1 lymphoid nodules/cm2, and in the group receiving the complex preparation – 7.5±0.3 lymphoid nodules/cm2 .

The Effects of the Food Additive Titanium Dioxide (E171) on Tumor Formation and Gene Expression in the Colon of a Transgenic Mouse Model for Colorectal Cancer.

Titanium dioxide (TiO2) is present in many different food products as the food additive E171, which is currently scrutinized due to its potential adverse effects, including the stimulation of tumor formation in the gastrointestinal tract. We developed a transgenic mouse model to examine the effects of E171 on colorectal cancer (CRC), using the Cre-LoxP system to create an Apc-gene-knockout model which spontaneously develops colorectal tumors. A pilot study showed that E171 exposed mice developed colorectal adenocarcinomas, which were accompanied by enhanced hyperplasia in epithelial cells, lymphatic nodules at the base of the polyps, and increased tumor size. In the main study, tumor formation was studied following the exposure to 5 mg/kgbw/day of E171 for 9 weeks (Phase I). E171 exposure showed a statistically nonsignificant increase in the number of colorectal tumors in these transgenic mice, as well as a statistically nonsignificant increase in the average number of mice with tumors. Gene expression changes in the colon were analyzed after exposure to 1, 2, and 5 mg/kgbw/day of E171 for 2, 7, 14, and 21 days (Phase II). Whole-genome mRNA analysis revealed the modulation of genes in pathways involved in the regulation of gene expression, cell cycle, post-translational modification, nuclear receptor signaling, and circadian rhythm. The processes associated with these genes might be involved in the enhanced tumor formation and suggest that E171 may contribute to tumor formation and progression by modulation of events related to inflammation, activation of immune responses, cell cycle, and cancer signaling.

Unusual Presentation of Diffuse Large B-cell Lymphoma of Nasopharynx

Diffuse large B-cell lymphoma (DLBCL) is an aggressive form of lymphoma with good survival if treated promptly and under appropriate management modalities. The extranodal occurrence of DLBCL in the head and neck region is uncommon in children. Diagnosis is often delayed when the presentation is atypical, especially involving unusual sites. This is a report of a 13-year-old child who presented with a headache. He had a history of infectious mononucleosis 1 year ago, diagnosed by fine-needle aspiration cytology of the cervical lymph node. Imaging studies showed a lesion in the nasopharynx extending to the parapharyngeal space. Diagnostic nasal endoscopy showed a smooth mass in the left nasal cavity, which was biopsied and diagnosed as DLBCL on histopathology and immunohistochemistry. He was treated with chemotherapy; however, the disease did not respond to the treatment. We emphasize that headaches in a young boy necessitating frequent visits to medical practitioners should not be ignored but evaluated thoroughly.

Disseminated tuberculosis presenting as cardiac tamponade—Uncommon presentation in common disease

Tuberculosis is the most common infection in India, and its incidence accounts for approximately one-fifth of the global burden. Cardiac tamponade resulting from the liver abscess with subdiaphragmatic rupture communicating with pericardial cavity presenting as disseminated tuberculosis is uncommon. Here, we reported a case of a 63-year-old man who presented with the shortness of breath for 3 days with orthopnea. Imaging studies reveal pericardial effusion, left liver lobe loculated lesion, and enlarged right supraclavicular lymph node. Further image-guided pericardiocentesis, left liver lobe aspiration cytology, and right supraclavicular lymph node cytology reveal granulomatous inflammation with positive acid-fast bacillus in the liver aspirate. The patient was managed in the emergency room symptomatically initially and was then successfully treated with antituberculous treatment.

Macro-microscopic anatomy of the lymphoid nodules of the urinary organs in people of different age

The aim of the investigation was to study the quantitative morphometric characteristics of the lymphoid follicles in the walls of the urinary tract using the method of macro-microscopy.Material and methods. The topography, number and size of lymphoid nodules in the walls of the ureters, bladder and urethra obtained from the corpses of 142 people of different ages were studied by macro-microscopy using a binocular stereomicroscope MBS-9 after elective staining with Harris's hematoxylin. The material was taken from persons whose death was due to injuries and asphyxia, and autopsy showed no signs of pathology of the urinary organs. For statistical data processing, parametric statistics methods based on the Statistica 6.0 program were used. Statistical data processing included the calculation of arithmetic mean indicators, their errors, analysis of the amplitude of the variation series of each indicator.Results. Lymphoid nodules are permanent structures in the walls of the ureters, bladder, and urethra. The number of lymphoid structures is maximum in the 1st period of childhood. In subsequent age periods, regardless of organ affiliation, the number of lymphoid nodules decreases with age, reaching a minimum in old age. In the 1st period of childhood, the maximum values are also reached by the size indicators of lymphoid nodules, increasing in the walls of the right ureter by 5.06 times, the left ureter – by 5.22 times, the bladder – by 4.60 times, the male urethra – by 4.60 times, female urethra – 4.65 times compared with the neonatal period (p<0.05). In the future, a decrease in size is observed, which is most pronounced in old age in the walls of the female urethra. Regional (organ) differences are in a smaller number of lymphoid nodules and their size in the walls of the ureters and the maximum value of these parameters in the walls of the urethra.

DISTRIBUTION OF S100 -POSITIVE CELLS IN THE STRUCTURES OF THE SPLEEN IN THE SIMULATION OF CHRONIC NORMOBARIC HYPOXIC HYPOXIA IN THE EXPERIMENT

The aim of the research was to study the behavior of S100-positive cells in the structures of the spleen of laboratory animals in normal conditions and against the background of chronic hypoxic hypoxia. S100-positive cells are professional antigen-presenting cells and at the same time create a microenvironment for B-lymphocytes in the corresponding B-dependent areas of the spleen. Along with this, the expression of markers such as Ki67 and p53 was defined as determining the relationship between the processes of cell regeneration and apoptosis. Chronic isolated normobaric hypoxic hypoxia was simulated on 86 white outbred male rats in special priming chambers with controlled air supply for four hours a day, five days a week for 4 months. The analysis of the data showed that as the duration of the chronic experiment increased, the expression of the p53 marker increased mainly in the B-dependent zones, while the expression of Ki67 in the analogous zones decreased. Also, as the period of chronic hypoxia increased, a significant increase in the expression of the S100 marker in the lymphoid nodules of the white pulp of the spleen was noted. In parallel with this, there is an increase in the relative volume of the T-dependent zone and a decrease in the marginal zone of the white pulp. Thus, an increase in the volume fraction of stromal components along with an increase in the expression of an apoptosis marker in lymphoid nodules of the white pulp of the spleen may indicate the formation of tension in humoral immunity and subsequent depletion of compensatory-adaptive cellular elements of the corresponding zones by the end of the experiment.

Embryopathological relationship between retained medullary cord and caudal spinal lipoma

PurposeRetained medullary cord (RMC) is a condition in which the cord-like structure (C-LS) is continuous from the conus and extends to the dural cul-de-sac, causing spinal cord tethering, which is thought to originate from the secondary neurulation failure. Although diagnostic criteria for RMC have not yet been fully established, the following three items are generally considered important: (1) Typical morphological features on neuroimaging and intraoperative view. (2) The electrophysiological border between the conus and C-LS. (3) Ependyma-lined canal with surrounding neuroglial tissues (E-LC w/NGT) on histopathological examination of C-LS. To clarify the differences with caudal lipoma, which are also considered to be secondary neurulation disorders, in their embryological backgrounds, the clinicopathophysiological findings were compared. MethodsFive patients with RMC and 11 with caudal lipomas participated in this study. ResultsAll five patients with RMC naturally satisfied all three items. Four patients histopathologically showed a small amount of fibroadipose tissue. Regarding the first item in caudal lipoma, neuroimages demonstrated C-LS running parallel with or in the lipoma in all patients. In terms of the second item, the electrophysiological border was identified in 3 out of 4 patients in whom a sufficient operative field was obtained. Concerning the third item, E-LC w/NGT was noted in 6 of 7 patients in whom the lipoma was resected as a column. Areas of fibroadipose tissue histopathologically accounted for more than half of the total area. ConclusionThe caudal lipomas fulfilled most of the three items, and the only prominent difference between these two is the difference in the proportions of fibroadipose and fibrocollagenous tissues. These findings provide further evidence for the idea that RMC and caudal lipoma can be considered consequences of a continuum of regression failure during secondary neurulation, and it may not be possible to distinguish between the two clearly.

Injury-induced inflammatory signaling and hematopoiesis in Drosophila

Inflammatory response in Drosophila to sterile (axenic) injury in embryos and adults has received some attention in recent years, and most concentrate on the events at the injury site. Here we focus on the effect sterile injury has on the hematopoietic organ, the lymph gland, and the circulating blood cells in the larva, the developmental stage at which major events of hematopoiesis are evident. In mammals, injury activates Toll-like receptor/NF-κB signaling in macrophages, which then express and secrete secondary, proinflammatory cytokines. In Drosophila larvae, distal puncture injury of the body wall epidermis causes a rapid activation of Toll and Jun kinase (JNK) signaling throughout the hematopoietic system and the differentiation of a unique blood cell type, the lamellocyte. Furthermore, we find that Toll and JNK signaling are coupled in their activation. Secondary to this Toll/JNK response, a cytokine, Upd3, is induced as a Toll pathway transcriptional target, which then promotes JAK/STAT signaling within the blood cells. Toll and JAK/STAT signaling are required for the emergence of the injury-induced lamellocytes. This is akin to the derivation of specialized macrophages in mammalian systems. Upstream, at the injury site, a Duox- and peroxide-dependent signal causes the activation of the proteases Grass and SPE, needed for the activation of the Toll-ligand Spz, but microbial sensors or the proteases most closely associated with them during septic injury are not involved in the axenic inflammatory response.

Research on the Histological Features and Pathological Types of Gastric Adenocarcinoma With Mucinous Differentiation.

ObjectiveTo discuss the histological features, pathological types, and prognosis of gastric adenocarcinoma with mucinous differentiation.MethodsSpecimens of 189 cases of gastric adenocarcinoma with mucinous differentiation were collected for detailed histomorphology, immunohistochemistry, fluorescence in situ hybridization, and follow-up.ResultsIn accordance with the morphological and histological structural features of the cancer cells as well as the area ratio of the mucus, gastric adenocarcinoma with mucinous differentiation was divided into four types, namely pure mucinous carcinoma, intraductal papillary mucinous carcinoma, signet ring cell type mucinous carcinoma, and mixed cell type mucinous carcinoma. Based on the macroscopic types according to Bormann's classification, pure mucinous carcinoma was mostly Type I, intraductal papillary mucinous carcinoma was mostly Type II, signet ring cell type mucinous carcinoma was mostly Type IV, and mixed cell type mucinous carcinoma was mostly Type III. The 5-year survival rate was 69.2, 64.2, 0, and 31.5%, respectively. There was a statistical difference in the lymph node metastasis rate and survival rate of the four carcinoma types. The invasion features of pure mucinous carcinoma entailed penetrating corrosively in a push-in form, without blood vessel or lymphatic metastasis and with few lymphocytes and lymphatic nodules in the marginal area. Thus, there was little lymph node metastasis and invasion of nerves. The HER2 protein expression rate was 40.2% (76/189), the HER2 gene amplification detected by FISH technology was 16.9% (32/189).ConclusionThe independent histological type, four subtypes, and histopathological classification of gastric mucinous adenocarcinoma are important for the prognosis evaluation and precise treatment of this disease.