Oogenesis in Culicoides Brevitarsis Kieffer (Diptera: Ceratopogonidae) and the Development of a Plastron-Like Layer on the Egg.

1975 ◽  
Vol 23 (2) ◽  
pp. 203 ◽  
Author(s):  
MM Campbell ◽  
DS Kettle
Keyword(s):  
Blood Meal ◽  
Late Stage ◽  
Convex Surface ◽  
Stage Iv ◽  
Stage Iii ◽  
Concave Surface ◽  
Primary Oocyte ◽  
Average Fecundity ◽  
Pore Canals

In C. brevitarsis the mature egg was 290 �m long, average fecundity was 31.3, and duration of oogenesis 30-50 h at 24-26�C. When the first blood meal was consumed oocytes ranged from stage No to I, and 95.8% of females were mated; after a partial blood meal fewer oocytes were initiated and even fewer matured. It is highly likely that C. brevitarsis is anautogenous. Oocytes develop through the same stages as other Culicoides. Chorion developed well below the sheath in late stage IV, causing a reduction in width of oocytes at maturation. Ansulae develop in the space between the sheath and chorion by outward sclerotization, possibly along pore canals; they vary from tall (8-9 �m) and broad on the concave surface to short (5-6 �m) and narrow on the convex surface; those on the concave surface probably act as a plastron. The sheath surrounding the stage IV oocyte is destroyed during maturation. The secondary oocyte commences development when the primary is at stage III, and its development is arrested at either stage N or I almost simultaneously with the primary oocyte completing development. Development of the secondary oocyte is initiated but not controlled by development of the primary in the same ovariole.

Dependence of the joint configuration on the dynamic immobility fulcrum

2019 ◽  
pp. 108-114
Author(s):  
A. D. Kozlov ◽  
Yu. P. Potekhina
Keyword(s):  
Kinetic Energy ◽  
Convex Surface ◽  
The Other ◽  
Concave Surface ◽  
Joint Configuration ◽  
Articular Surfaces

Although joints with synovial cavities and articular surfaces are very variable, they all have one common peculiarity. In most cases, one of the articular surfaces is concave, whereas the other one is convex. During the formation of a joint, the epiphysis, which has less kinetic energy during the movements in the joint, forms a convex surface, whereas large kinetic energy forms the epiphysis with a concave surface. Basing on this concept, the analysis of the structure of the joints, allows to determine forces involved into their formation, and to identify the general patterns of the formation of the skeleton.

scholarly journals The halo model as a versatile tool to predict intrinsic alignments

2020 ◽  
Author(s):  
Maria Cristina Fortuna ◽  
Henk Hoekstra ◽  
Benjamin Joachimi ◽  
Harry Johnston ◽  
Nora Elisa Chisari ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Power Spectra ◽  
Stage Iv ◽  
Stage Iii ◽  
Radial Dependence ◽  
Additional Parameter ◽  
Small Scales ◽  
Cosmic Shear ◽  
Galaxy Populations ◽  
The Impact

Abstract Intrinsic alignments (IAs) of galaxies are an important contaminant for cosmic shear studies, but the modelling is complicated by the dependence of the signal on the source galaxy sample. In this paper, we use the halo model formalism to capture this diversity and examine its implications for Stage-III and Stage-IV cosmic shear surveys. We account for the different IA signatures at large and small scales, as well for the different contributions from central/satellite and red/blue galaxies, and we use realistic mocks to account for the characteristics of the galaxy populations as a function of redshift. We inform our model using the most recent observational findings: we include a luminosity dependence at both large and small scales and a radial dependence of the signal within the halo. We predict the impact of the total IA signal on the lensing angular power spectra, including the current uncertainties from the IA best-fits to illustrate the range of possible impact on the lensing signal: the lack of constraints for fainter galaxies is the main source of uncertainty for our predictions of the IA signal. We investigate how well effective models with limited degrees of freedom can account for the complexity of the IA signal. Although these lead to negligible biases for Stage-III surveys, we find that, for Stage-IV surveys, it is essential to at least include an additional parameter to capture the redshift dependence.

Carboplatin and chlorambucil combination chemotherapy as treatment for patients with ovarian cancer

1994 ◽  
Vol 4 (1) ◽  
pp. 66-71
Author(s):  
B. D. Evans ◽  
P. Chapman ◽  
P. Dady ◽  
G. Forgeson ◽  
D. Perez ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Small Volume ◽  
Residual Disease ◽  
Stage Iv ◽  
Complete Response ◽  
Stage Ii ◽  
Stage Iii ◽  
Actuarial Survival ◽  
Moderate Volume ◽  
Grade Iii

Fifty-six patients with ovarian cancer (three stage IC, nine stage II, 33 stage III and II stage IV) were treated with carboplatin 350 mg m−2 i.v. day 1 and chlorambucil orally 0.15 mg kgm−1 days 1–7 inclusive, repeated every 28 days for eight courses. The regimen was well tolerated and was virtually free of nephro- and neurotoxicity. Grade III or IV hematology toxicity occurred in 18 patients but only 31 or 330 courses administered were delayed. Of 40 assessable patients eight achieved a clinical/radiologic complete response and 17 a clinical/radiologic partial response. Actuarial survival at 50 months was 65% for stage II patients, 27% for stage III patients and no stage IV patients survived beyond 20 months. Forty-two per cent of patients with residual disease less 2 cm survived 50 months, compared with 44% of patients with moderate volume (2–5 cm) residual disease and 6% of patients with bulk residual disease. This is an active, well tolerated regimen. However, only patients with small volume residual disease have a significant chance of prolonged survival.

scholarly journals The gravireceptor of Phycomyces. Its development following gravity exposure.

1984 ◽  
Vol 84 (6) ◽  
pp. 845-859 ◽  
Author(s):  
D S Dennison ◽  
W Shropshire
Keyword(s):  
Spatial Relationship ◽  
Stage Iv ◽  
Development Stage ◽  
Stage Ii ◽  
Stage Iii ◽  
Mature Stage ◽  
Early Exposure ◽  
Altered Gravity

The gravitropism of a mature stage IV Phycomyces sporangiophore has a shorter and more uniform latency if the sporangiophore is exposed horizontally to gravity during its earlier development (stage II and stage III). This early exposure to an altered gravitational orientation causes the sporangiophore to develop a gravireceptor as it matures to stage IV and resumes elongation. A technique has been developed to observe the spatial relationship between the vacuole and the protoplasm of a living sporangiophore and to show the reorganization caused by this exposure to altered gravity. Possible gravireceptor mechanisms are discussed.

scholarly journals 300 Final analysis of a prospective, randomized, double-blind, placebo-controlled phase IIb trial of tumor lysate, particle-loaded, dendritic cell vaccine in stage III/IV melanoma: 36-month analysis

2020 ◽  
Vol 8 (Suppl 3) ◽  
pp. A327-A327
Author(s):  
Lexy Adams ◽  
Robert Chick ◽  
Guy Clifton ◽  
Timothy Vreeland ◽  
Patrick McCarthy ◽  
...  
Keyword(s):  
Disease Free Survival ◽  
Stage Iv ◽  
Standard Of Care ◽  
Stage Iii ◽  
Tumor Lysate ◽  
Double Blind ◽  
Free Survival ◽  
Resected Stage ◽  
Disease Free ◽  
Stage Iv Melanoma

BackgroundThe tumor lysate, particle-loaded, dendritic cell (TLPLDC) vaccine is created ex vivo by loading autologous dendritic cells (DC) with yeast cell wall particles (YCWP) containing autologous tumor lysate, thus delivering tumor antigens to the DC cytoplasm via phagocytosis. TLPLDC then activates a robust T cell response against the unique antigens for each patient. The primary analysis of the prospective, randomized, multi-center, double-blind, placebo-controlled phase IIb trial in patients with resected stage III/IV melanoma showed TLPLDC improved 24-month disease-free survival (DFS) in the per-treatment (PT) analysis (patients completing the 6-month primary vaccine series). Here, we examine the secondary endpoint of 36-month DFS and overall survival (OS).MethodsPatients with resected stage III/IV melanoma were randomized 2:1 to TLPLDC vaccine or placebo (autologous DC loaded with empty YCWP). Treatments were given at 0, 1, 2, 6, 12 and 18 months. The protocol was amended to include patients receiving concurrent checkpoint inhibitors (CPIs) to follow changes in standard of care. The co-primary endpoints were 24-month DFS by intention-to-treat (IT) analysis and per-treatment (PT) analysis, with secondary endpoints including 36-month DFS and OS by ITT and PT analysis, pre-specified analysis by stage, and safety as measured by CTCAE v4.03.ResultsOverall, 103 patients received TLPLDC and 41 placebo. In PT analysis, 65 patients received TLPLDC and 32 placebo. Total adverse events (AEs), grade 3+ AEs, and serious AEs (SAEs) were similar in placebo vs TLPLDC groups, with one related SAE per treatment arm. By ITT analysis, 36-month OS was 76.2% for TLPLDC vs 70.3% for placebo (HR 0.72, p=0.437) and 36-month DFS was 35.6% vs 27.1% (HR 0.95, p=0.841). By PT analysis, 36-month DFS was improved with TLPLDC (57.5% vs 35.0%; HR 0.50, p=0.025, figure 1). This effect was even more dramatic in resected stage IV patients (36-month DFS: 60.9% vs 0%; HR 0.12, p=0.001, figure 2).ConclusionsThis phase IIb trial again demonstrates the safety of the TLPLDC vaccine, and an improved 36-month DFS in patients with resected stage III/IV melanoma who complete the primary vaccine series, particularly in the stage IV subgroup. Next, a phase III trial will evaluate the efficacy of TLPLDC vaccine as adjuvant treatment for resected stage IV melanoma, with patients randomized to receive standard of care PD-1 inhibitors + TLPLDC versus PD-1 inhibitors + placebo.Abstract 300 Figure 136-month disease free survival for patients receiving TLPLDC vs placebo by PT analysisAbstract 300 Figure 236-month disease free survival for subset of stage IV melanoma patients receiving TLPLDC vs placebo by PT analysisTrial RegistrationThis is a phase IIb clinical trial registered under NCT02301611Ethics ApprovalThis study was approved by Western IRB, protocol 20141932.

XMAP230 is required for the assembly and organization of acetylated microtubules and spindles in Xenopus oocytes and eggs

1998 ◽  
Vol 111 (16) ◽  
pp. 2315-2327 ◽  
Author(s):  
B.J. Cha ◽  
B. Error ◽  
D.L. Gard
Keyword(s):  
Late Stage ◽  
Xenopus Oocytes ◽  
Early Stage ◽  
Polyclonal Antibodies ◽  
Stage Iv ◽  
Stage I ◽  
Meiotic Spindle ◽  
Heat Stable ◽  
Early Embryos ◽  
And Function

We used affinity-purified polyclonal antibodies to characterize the distribution and function of XMAP230, a heat-stable microtubule-associated protein isolated from Xenopus eggs, during oogenesis. Immunoblots revealed that XMAP230 was present throughout oogenesis and early development, but was most abundant in late stage oocytes, eggs, and early embryos. Immunofluorescence microscopy revealed that XMAP230 was associated with microtubules in oogonia, post-mitotic stage 0 oocytes, early stage I oocytes, and during stage IV-VI of oogenesis. However, staining of microtubules by anti-XMAP230 was not detectable during late stage I through stage III. In stage VI oocytes, anti-XMAP230 stained a large subset of microtubules that were also stained with monoclonal antibodies specific for acetylated (α)-tubulin. During oocyte maturation, XMAP230 was associated with the transient microtubule array that serves as the precursor of the first meiotic spindle, as well as both first and second meiotic spindles. The extensive array of cytoplasmic microtubules present throughout maturation was not detectably stained by anti-XMAP230. Microinjection of anti-XMAP230 locally disrupted the organization and acetylation of microtubules in stage VI oocytes, and reduced the re-acetylation of microtubules during recovery from cold-induced microtubule disassembly. Subsequent maturation of oocytes injected with anti-XMAP230 resulted in defects in the assembly of the transient microtubules array and first meiotic spindle. These observations suggest that XMAP230 is required for the stabilization and organization of cytoplasmic and spindle microtubules in Xenopus oocytes and eggs.

The impact of the COVID-19 pandemic on stage at diagnosis of breast and colorectal cancers.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. 6501-6501
Author(s):  
Jade Zhou ◽  
Shelly Kane ◽  
Celia Ramsey ◽  
Melody Ann Akhondzadeh ◽  
Ananya Banerjee ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Colorectal Cancer ◽  
Cancer Screening ◽  
Late Stage ◽  
Stage Iv ◽  
Stage I ◽  
Screening Programs ◽  
Stage Distribution ◽  
Number Of Patients ◽  
The Impact

6501 Background: Effective cancer screening leads to a substantial increase in the detection of earlier stages of cancer, while decreasing the incidence of later stage cancer diagnoses. Timely screening programs are critical in reducing cancer-related mortality in both breast and colorectal cancer by detecting tumors at an early, curable stage. The COVID-19 pandemic resulted in the postponement or cancellation of many screening procedures, due to both patient fears of exposures within the healthcare system as well as the cancellation of some elective procedures. We sought to identify how the COVID-19 pandemic has impacted the incidence of early and late stage breast and colorectal cancer diagnoses at our institution. Methods: We examined staging for all patients presenting to UCSD at first presentation for a new diagnosis of malignancy or second opinion in 2019 and 2020. Treating clinicians determined the stage at presentation for all patients using an AJCC staging module (8th edition) in the electronic medical record (Epic). We compared stage distribution at presentation in 2019 vs 2020, both for cancers overall and for colorectal and breast cancer, because these cancers are frequently detected by screening. Results: Total numbers of new patient visits for malignancy were similar in 2019 and 2020 (1894 vs 1915 pts), and stage distribution for all cancer patients was similar (stage I 32% in 2019 vs 29% in 2020; stage IV 26% in both 2019 and 2020). For patients with breast cancer, we saw a lower number of patients presenting with stage I disease (64% in 2019 vs 51% in 2020) and a higher number presenting with stage IV (2% vs 6%). Similar findings were seen in colorectal cancer (stage I: 22% vs 16%; stage IV: 6% vs 18%). Conclusions: Since the COVID-19 pandemic, there has been an increase in incidence of late stage presentation of colorectal and breast cancer, corresponding with a decrease in early stage presentation of these cancers at our institution. Cancer screening is integral to cancer prevention and control, specifically in colorectal and breast cancers which are often detected by screening, and the disruption of screening services has had a significant impact on our patients. We plan to continue following these numbers closely, and will present data from the first half of 2021 as it becomes available.

scholarly journals Clinicopathological Profile of Wilms’ Tumour in Children

2014 ◽  
Vol 32 (1) ◽  
pp. 5-8
Author(s):  
M Mazumder ◽  
A Islam ◽  
N Farooq ◽  
M Zaman
Keyword(s):  
Wilms Tumor ◽  
Stage Iv ◽  
Abdominal Distension ◽  
Stage Ii ◽  
Stage Iii ◽  
Wilms Tumour ◽  
Female Ratio ◽  
Male Female Ratio ◽  
Clinicopathological Profile ◽  
Treatment Objective

Introduction: Wilms’ tumor is the most common primary malignant renal tumor of childhood. It is important to pick up the children with wilms’ tumor earlier as early stages has excellent outcomes after treatment. Objective : To find out the common clinical presentations and pathological profile of Wilms’ tumor in children. Methods and Materials : A hospital based prospective study done with twenty diagnosed patients of Wilms tumour enrolled from department of Pediatric haemato-oncology, BSMMU, Dhaka in the period between January to December 2008. Results- The peak incidence of Wilms’ tumor was in 1 to 5 years age group (80%,n=16). Median age at presentation was 49 months with male: female ratio 1.8:1.The most common presentation was abdominal swelling (80%,n=16),followed by flank mass (75%,n=15), abdominal pain (55%,n=11), haematuria (15%,n=3), hypertension (10%,n=2). Thirteen raised from right kidney, ratio of right to left involvement 1.8:1. Histologically 13(65%) patients had triphasic histology having blastemal, stromal and epithelial elements, 7(35%) was biphasic having blastema and epithelia. All had favourable histological pattern. Most patients presented in stage III (55%,n=11) followed by stage II (25%,n=5), Stage IV(10%,n=2), Stage I(10%,n=2). No bilateral presentation. Conclusions : Most of the patients of Wilms’ tumor presented within 1 to 5 years of age(80%) with abdominal distension(80%) and flank mass(75%), few associated with haematuria(15%) and hypertension(10%). Histologically all were favourable and maximum presented in stage III (55%) followed by stage II(25%). DOI: http://dx.doi.org/10.3329/jbcps.v32i1.21015 J Bangladesh Coll Phys Surg 2014; 32: 5-8

Arthroscopic Treatment of Anterior Ankle Impingement

1997 ◽  
Vol 18 (7) ◽  
pp. 418-423 ◽  
Author(s):  
Alberto Branca ◽  
Luigi Di Palma ◽  
Carmelo Bucca ◽  
Camilla Sagarriga Visconti ◽  
M. Di Mille
Keyword(s):  
Preoperative Evaluation ◽  
Stage Iv ◽  
Ankle Arthroscopy ◽  
Stage Iii ◽  
Joint Cartilage ◽  
Ankle Impingement ◽  
Radiological Classification ◽  
Invasive Techniques ◽  
Anterior Ankle Impingement

Ankle arthroscopy has recently allowed the elaboration of less invasive techniques for the treatment of anterior impingement. Its indications, advantages, and drawbacks in this application are discussed. Between 1987 and 1994, 133 patients were treated for ankle impingement. Among them, 58 patients, 37 men and 21 women (mean age, 28.5 years), who had failed a trial of conservative treatment were treated by means of tibiotalar arthroscopy. Twenty-seven were athletes engaged in sports with abnormal stressing of the ankle. According to McDermott's radiological classification, there were 15 stage I cases, 23 stage II, 13 stage III, and 7 stage IV. Preoperative evaluation with a modified version of McGuire's scoring system gave 50 cases rated as “poor” (<60 points) and 8 cases rated as “fair” (60–67 points). Treatment consisted of removal of adhesions, cartilage shaving, and removal of the bone impingement with powered instruments, curettes, or small osteotomes. Follow-up was from 8 to 62 months (mean, 21.5 months). The postoperative McGuire ratings were 37 good, 13 fair, and 8 poor. There were no major complications. Recurrence of impingement was observed in four cases of stage III and IV. The conclusion is drawn that ankle arthroscopy is a sound method for the treatment of anterior impingement. Even in cases with severe joint cartilage impairment, it plays a therapeutic role as a means of postponing a possible arthrodesis.

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