Pericyte Ultrastructural Pathology in Autoimmune Inflammatory Myopathies

1998 ◽  
Vol 4 (S2) ◽  
pp. 1080-1081
Author(s):  
H.J. Finol ◽  
A. Marquez ◽  
M. Pulido-Mendez ◽  
B. Muller ◽  
I. Montes de Oca ◽  
...  

Ultrastructural Pathology of capillary endothelial cells in autoimmune inflammatory myopathies has been intensively investigated in the last two decades, but much less is known about the alterations of capillary pericytes. In other diseases as diabetes and arterial hypertension perycites abnormalities have been reported. In this work we report the pericyte ultrastructural pathology in autoimmune inflammatory myopathies.Patients admitted to the study were attending the rheumatology clinics at the Caracas University Hospital. Diagnoses were systemic lupus erythematosus, rheumatoid arthritis, systemic sclerosis, and muscle paraneoplastic phenomenon.Needle muscle biopsies were processed with routine techniques for transmission electron microscopy and observed in a Hitachi H-500 electron microscope.Two different processes were observed, pericyte hypertrophy and cell degeneration. In the first one cytoplasmic proliferation is evident (Fig. 1). Some capillaries embraced by the pericyte were found (Fig. 2). In the second one cytoplasmic vacuolation and capillary necrosis (Fig. 3) were evident. Usually, pericyte and endothelial degeneration were concomitant.

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1458.1-1458
Author(s):  
I. A. Moreno-Arquieta ◽  
G. G. Sánchez Mendieta ◽  
D. E. Flores Alvarado ◽  
J. A. Esquivel Valerio ◽  
D. Á. Galarza-Delgado

Background:The pandemic COVID-19 has set a new challenge in adherence to treatment in patients with rheumatic diseases. Prior studies in Latin America had reported adherence of 16.4% on Rheumatoid Arthritis (RA) and 45.9% in Systemic Lupus Erythematous (SLE). There is evidence that these patients believe their treatment increases the risk and gravity of COVID-19 and therefore, suspending the treatment could reduce this risk. It has been shown that a “Good adherence” is associated to a better survival.Objectives:Describe the adherence to DMARDs in patients with Rheumatic diseases during COVID-19.Methods:Descriptive, cross-sectional, self-report study conducted in rheumatology outpatient clinic of University Hospital in Monterrey, México. Consecutive patients with RA, SLE, Inflammatory Myopathies and Systemic Sclerosis, were approached during their routine appointments, March 2020 to December 2020 period during COVID-19 pandemic. They were asked how many days of the month they took the DMARD indicated in the previous appointment, with Based on this, adherence was classified into four categories: Good 100-75% (> 21 days), Regular 74-50% (21-15 days), Bad 49-25% (14-8 days) and Null <25% (<7 days). Data was obtained from our internal electronic patient record registry and analyzed with SPSS V.22.Results:n (DMARDs)GoodRegularBadNulln (%)n (%)n (%)n (%)Rheumatoid Arthritis302255 (84.4)13 (4.3)20 (6.6)14 (4.6)Systemic Lupus Erithematous126111 (88)3 (2.3)8 (6.3)4 (3.1)Inflammatory Myopathies1110 (90.9)0 (0)1 (9)0 (0)Systemic Sclerosis3027 (90)2 (6.6)1 (3.3)0 (0)TOTAL469Conclusion:Despite what it is believed, patients are not changing therapeutic regimes. The adherence found in this group of patients was good, for the definition used in this study. It should be considered that the self-report method may overestimate adherence, so the data found must be correlated with objective methods in the future.References:[1]Resende Prudente L, Souza Diniz J, Matteucci Ferreira TXA, Marçal Lima D, Antônio Silva N, Saraiva G, et al. Medication adherence in patients in treatment for rheumatoid arthritis and systemic lupus erythematosus in a university hospital in Brazil. Patient Preference and Adherence. 2016:10 863–870.[2]Michaud K, Wipfler K, Shaw Y, et al. Experiences of patients with rheumatic diseases in the United States during early days of the COVID-19 pandemic. ACR Open Rheumatol 2020. doi:10.1002/acr2.11148.[3]Waimann ChA, Marengo MF, de Achaval S, Cox VL, Garcia-Gonzalez A, Reveille JD. Electronic Monitoring of Oral Therapies in Ethnically Diverse and Economically Disadvantaged Patients With Rheumatoid Arthritis. Arthritis & Rheumatism. 2013:6 1421-1429.Disclosure of Interests:None declared


Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1606
Author(s):  
Gabriella Nagy ◽  
László Czirják ◽  
Gábor Kumánovics

Introduction: Nailfold video capillaroscopy (NVC) is a useful tool for measuring capillary density (CD) and capillary morphology parameters and is mainly used in systemic sclerosis (SSc). Objective: We aimed to assess the prevalence of an SSc pattern and CD in different connective tissue diseases (CTDs). Methods: NVC was performed on 268 patients with CTDs. Control groups consisted of 104 healthy volunteers (HVs) and 36 primary Raynaud’s patients (PRPs). Results: Decreased CD was more prevalent in SSc, systemic lupus erythematosus (SLE), inflammatory myopathies (IIM), and overlap CTD patients compared with both controls. Average CD, the prevalence of decreased CD, and the prevalence of an SSc pattern did not differ significantly between SSc patients with (n = 39) and without (n = 50) overlap syndrome. An SSc pattern was significantly more prevalent in SLE (23%), SSc (82%), IIM (35%), and rheumatoid arthritis (17%) compared with both control groups. The prevalence of an elevated microangiopathy evaluation score (MES) was significantly higher in SLE, SSc, and IIM than in the HVs. Conclusion: The presence of another CTD in SSc did not influence CD or morphology. An SSc pattern may also be present in CTDs other than SSc. The MES is a useful instrument to distinguish between patients with CTDs and controls.


2014 ◽  
Vol 33 (8) ◽  
pp. 1093-1098 ◽  
Author(s):  
Lisbeth Aranbicia Aguila ◽  
Michelle Remião Ugolini Lopes ◽  
Flavia Zon Pretti ◽  
Percival Degrava Sampaio-Barros ◽  
Fernando Henrique Carlos de Souza ◽  
...  

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