scholarly journals Cytomegalovirus cell tropism and clinicopathological characteristics in gastrointestinal tract of patients with HIV/AIDS

2022 ◽  
Vol 17 (1) ◽  
Author(s):  
Lei Sun ◽  
Jia-min Chen ◽  
Kun Yang ◽  
Liang Zhang ◽  
Zhi-yuan Ma ◽  
...  

Abstract Background Cytomegalovirus (CMV) has been recognized as one of the frequently occurring opportunistic infections (OIs) reported in the patients having human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS). In addition, it has been identified as the factor leading to gastrointestinal (GI) tract disorder among HIV/AIDS population. CMV exhibits broad cell tropism in different organs. This study evaluated the CMV cell tropism and clinicopathological characteristics of CMV infection in the different GI regions in HIV/AIDS cases. Methods Using nucleic acid in situ hybridization (ISH), CMV was detected in the gastrointestinal mucosal biopsy samples. The paraffin-embedded samples were stained with hematoxylin and eosin (HE) and immunohistochemistry (IHC), respectively. Results A total of 32 HIV/AIDS patients were enrolled in this study. Fourteen of these patients underwent gastroscopy, while the remaining eighteen received colonoscopy. CMV-infected cells were observed at 46 GI sites. Among them, the colon was the region with the highest susceptibility to GI CMV infection (n = 12, 26.1%). The CMV giant cell inclusion bodies were detected in epithelial cells and mesenchymal cells, including histiocytes, smooth muscle cells, fibroblasts, and endothelial cells. In the duodenum, there were markedly more positive epithelial cells than mesenchymal cells (p = 0.033). In contrast, in the esophagus (p = 0.030), cardia (p = 0.003), rectum (p = 0.019), colon (p < 0.001), and cecum (p < 0.001), there were notably less positive epithelial cells than mesenchymal cells. The expression levels of PDGFRα and Nrp2 in the mesenchymal cells were higher than the epithelial cells in cardia, cecum, colon, sigmoid, and rectum, especially in the areas with ulcers. However, Nrp2 in the epithelial cells was higher than that in the duodenum. Moreover, the positive CMV DNA in peripheral blood was related to the CMV-positive cell count, as well as the ulceration in GI tract (p = 0.035 and 0.036, respectively). Conclusions The colon has been identified as the GI site with the highest susceptibility to CMV infection. There are different CMV-infected cells in the different sites of the GI that relate to the expression level of PDGFRα and Nrp2. CMV DNA positive in the blood is related to the positive CMV cell count, as well as ulceration in the GI tract.

2007 ◽  
Vol 82 (5) ◽  
pp. 2170-2181 ◽  
Author(s):  
Anders E. Lilja ◽  
W. L. William Chang ◽  
Peter A. Barry ◽  
S. Patricia Becerra ◽  
Thomas E. Shenk

ABSTRACT Rhesus cytomegalovirus (RhCMV) is an emerging model for human cytomegalovirus (HCMV) pathogenesis that facilitates experimental CMV infection of a natural primate host closely related to humans. We have generated a library of RhCMV mutants with lesions in genes whose HCMV orthologues have been characterized as nonessential for replication in human fibroblasts, and we characterized their replication in rhesus fibroblasts and epithelial cells. The RhCMV mutants grew well in fibroblasts, as predicted by earlier studies with HCMV. However, mutations in four genes caused replication defects in rhesus retinal pigment epithelial cells: Rh01 (an HCMV TRL1 orthologue), Rh159 (HCMV UL148), Rh160 (HCMV UL132), and Rh203 (HCMV US22). Growth of the Rh01-deficient mutant was examined in detail. After entry into epithelial cells, the mutant expressed representative viral proteins, accumulated viral DNA, and generated infectious virus, but it failed to spread efficiently. We conclude that Rh01 is a cell tropism determinant that has the potential to dramatically affect virus spread and pathogenesis.


2019 ◽  
Vol 6 (3) ◽  
pp. 845
Author(s):  
Deepak Pandharpurkar ◽  
Nagender Devulapally ◽  
B. Gouthami ◽  
Gudikandula Krishna

Background: HIV/AIDS was first recognized in USA in 1981 when centre for disease control (CDC) reported unexplained occurrence of Pneumocystis carinii pneumonia in 5 healthy homosexuals. Soon it was recognized in drug abusers and blood transfusion recipients. The present study has been taken up with an aim to know the incidence of various opportunistic infections in HIV positive patients and to correlate different opportunistic infections (OIs) with the CD4+cellcount.Methods: Sample of 132 cases admitted in Gandhi hospital during the study period were taken. CD4+ counting of blood samples was done by Flow cytometry as per manufacturer’s instructions (FACS Calibur, Becton- Dickinson, Immunocytometry system). Correlation of CD4 cell counts was done with the respective opportunistic infections.Results: TB (50%) is the most frequent OI followed by candidiasis (49%), pneumocystis (16%) and others. The mean CD4 cell count in TB was 110.80/mL and in candidiasis 97.84/mL. Low values were observed in CMV (27/mL) and in toxoplasmosis (61.66/mL).Conclusions: In most of the patient’s respiratory system was the most common system involved by OIs and had CD4 T cell count below 200/mL. Early diagnosis and prompt treatment of opportunistic infections is important. This study helps the clinicians in proper guidance to come up before development of severe immunodeficiency to prevent serious and fatal outcome.


2018 ◽  
Vol 7 (1) ◽  
pp. 16-21
Author(s):  
Mirna Widiyanti ◽  
Hotma Hutapea

Human Immunodeficiency Virus (HIV) is an infection that attacks and weakens the immune system. HIV infection causes a decrease in the number of Cluster Differentiation 4 (CD4) thereby increasing the progression of the disease and lead to high risk of opportunistic infections (OI). The purpose of this study was to examine the relationship between CD4 cell count with opportunistic infections in patients infected with HIV/AIDS. Analytical research methods using cross-sectional design, by taking medical records. The population in this study were 67 patients with HIV/AIDS in the VCT Clinic Dok II Hospital Jayapura 2014. Data were processed with the Chi Square test hypotheses. Based on the results of hypothesis testing of 67 patients, there were 21 people have opportunistic infections. Tuberculosis is an opportunistic infection that is most common (17.9%). Significance of the relationship seen in the low CD4 counts (< 350 cells/mm3) and found value of 0.02 (CI 95%) which indicates that there is a relationship if p<0.05. Conclusion: there is a relationship between CD4 cell count with opportunistic infections.Key words: CD4, opportunistic infection, HIV/AIDS, hospital.


2017 ◽  
Vol 33 (3) ◽  
pp. 147
Author(s):  
Mardia Mardia ◽  
Riris Andono Ahmad ◽  
Bambang Sigit Riyanto

Purpose: This study aimed to determine the quality of life among people living with HIV/AIDS based on the criteria for diagnosis and other factors.Methods: This study was conducted in the VCT clinic hospital of Dr. Moewardi. The population was HIV-positive patients with antiretroviral therapy. Data collection conducted through medical records and interview to patients. Results: Out of a total of 89 respondents, 66.29% were males and 71.91% were aged between 26-45 years. We found significant correlations for diagnosis of HIV/AIDS, opportunistic infections, time since HIV diagnosis, duration of ARV therapy, social support, modes of transport, sex, age, and marital status with the quality of life. Multivariate analysis obtained by each variable showed the strongest association with the quality of life was time since diagnosis, social support and duration of ARV therapy. Conclusion: The quality of life was better for those who have been diagnosed with HIV/AIDS ≥ 32 months, with social support, and who have been undergoing antiretroviral therapy ≥ 29 months. Improved counseling in the early days of ARV therapy is necessary to always maintain the treatment and provide support for their social life.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Morichika Osa ◽  
Akihiro Sato ◽  
Maki Sakagami ◽  
Masaki Machida ◽  
Takao Sato ◽  
...  

Abstract Background Cytomegalovirus (CMV) is an important pathogen among immunocompromised hosts. Typically, CMV in human immunodeficiency virus (HIV) infection causes diseases of the retina, digestive tract, lungs and liver, but there are few cases of CMV infection of the pharynx and larynx. Case presentation A 57-year-old man with HIV infection was admitted because of pharyngeal pain. Before and after admission, pharyngeal biopsies guided by laryngeal endoscopy were performed four times, but pathological examination showed nonspecific inflammation, and the cause of pharyngeal ulceration was unclear. Additionally, the ulceration deteriorated after initiation of retroviral therapy. Laryngomicrosurgery was conducted under general anesthesia to remove tissue, and pathological diagnosis confirmed CMV infection. Pathological features included enlargement of the cytoplasm and nucleus in infected cells, and intranuclear bodies called owl’s eye inclusions. Ganciclovir dramatically improved the symptoms and laryngoscopic findings. Conclusions This case was diagnosed as pharyngitis and pharyngeal ulceration caused by CMV infection, related to immune reconstitution inflammatory syndrome. In previous reports of CMV-induced pharyngeal or laryngeal ulceration in HIV infection, we found six cases similar to our present case. All cases were diagnosed by biopsy. The present case indicates the importance of biopsy for definitive diagnosis. CMV infection should be considered as a differential diagnosis of pharyngeal ulceration in patients with HIV infection.


Blood ◽  
1993 ◽  
Vol 82 (5) ◽  
pp. 1639-1646 ◽  
Author(s):  
DR Ratcliffe ◽  
J Michl ◽  
EB Cramer

Abstract Neutrophils appear to form the first line of defense against influenza virus, yet it is unclear how these leukocytes recognize influenza- infected cells. While demonstrating that neutrophils adhere specifically to the sialic acid-binding site on the hemagglutinin molecule (HA) on the surface of influenza-infected (WSN[H1N1]) epithelial cells and not to other viral or epithelial cell antigens, it was observed that human neutrophils do not recognize immune complexes formed with influenza virus. Intact antibodies (mouse monoclonal antibodies [MoAbs] IgG1 and IgG2b, human immune heat-inactivated serum [predominantly IgG1], and IgG purified from human immune serum) that block the sialic acid-binding site on HA significantly reduced (> 80%) neutrophil adherence to influenza-infected epithelial cells. Binding and phagocytosis of free influenza virions and neutrophil agglutination by influenza virus were completely prevented by these antibodies. Intact and F(ab')2 fragments of mouse MoAbs to other viral epitopes caused increased neutrophil adherence to infected cells. This binding was eliminated by F(ab'2) fragments of MoAbs against the sialic acid- binding site on HA, but not by saturating amounts of MoAbs, which block the neutrophil Fc receptors. Thus, it appears that human neutrophils show little ability to bind via their Fc receptors to the immune complexes formed with antibody and either influenza-infected epithelial cells or the free virion. These findings are in contrast to the general dogma, and are the first example of antibody opsonization reducing, rather than enhancing, neutrophil binding and phagocytosis of a pathogen.


Biomolecules ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 753
Author(s):  
Sneha Singh ◽  
Onkar B. Sawant ◽  
Shahzad I. Mian ◽  
Ashok Kumar

Several RNA viruses, including SARS-CoV-2, can infect or use the eye as an entry portal to cause ocular or systemic diseases. Povidone-Iodine (PVP-I) is routinely used during ocular surgeries and eye banking as a cost-effective disinfectant due to its broad-spectrum antimicrobial activity, including against viruses. However, whether PVP-I can exert antiviral activities in virus-infected cells remains elusive. In this study, using Zika (ZIKV) and Chikungunya (CHIKV) virus infection of human corneal and retinal pigment epithelial cells, we report antiviral mechanisms of PVP-I. Our data showed that PVP-I, even at the lowest concentration (0.01%), drastically reduced viral replication in corneal and retinal cells without causing cellular toxicity. Antiviral effects of PVP-I against ZIKV and CHIKV were mediated by direct viral inactivation, thus attenuating the ability of the virus to infect host cells. Moreover, one-minute PVP-I exposure of infected ocular cells drastically reduced viral replication and the production of infectious progeny virions. Furthermore, viral-induced (CHIKV) expression of inflammatory genes (TNF-α, IL-6, IL-8, and IL1β) were markedly reduced in PVP-I treated corneal epithelial cells. Together, our results demonstrate potent antiviral effects of PVP-I against ZIKV and CHIKV infection of ocular cells. Thus, a low dose of PVP-I can be used during tissue harvesting for corneal transplants to prevent potential transmission of RNA viruses via infected cells.


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