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03 October 2020: Articles  USA

A 63-Year-Old Woman with a History of Non-Hodgkin Lymphoma with Persistent SARS-CoV-2 Infection Who Was Seronegative and Treated with Convalescent Plasma

Unusual clinical course

Joanna L. Moore12EF*, Pavan V. Ganapathiraju3EF, Caroline P. Kurtz4E, Booth Wainscoat5E

DOI: 10.12659/AJCR.927812

Am J Case Rep 2020; 21:e927812

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Abstract

BACKGROUND: This is a case report of an immunocompromised patient with a history of non-Hodgkin lymphoma and persistent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection who was seronegative and successfully treated with convalescent plasma.

CASE REPORT: A 63-year-old woman with a past medical history of non-Hodgkin lymphoma in remission while on maintenance therapy with the anti-CD20 monoclonal antibody, obinutuzumab, tested positive for SARS-CoV-2 via nasopharyngeal reverse transcription polymerase chain reaction (RT-PCR) testing over 12 weeks and persistently tested seronegative for immunoglobulin G (IgG) antibodies using SARS-CoV-2 IgG chemiluminescent microparticle immunoassay technology. During this time, the patient experienced waxing and waning of symptoms, which included fever, myalgia, and non-productive cough, but never acquired severe respiratory distress. She was admitted to our hospital on illness day 88, and her symptoms resolved after the administration of convalescent plasma.

CONCLUSIONS: As the understanding of the pathogenesis of SARS-CoV-2 continues to evolve, we can currently only speculate about the occurrence of chronic infection vs. reinfection. The protective role of antibodies and their longevity against SARS-CoV-2 remain unclear. Since humoral immunity has an integral role in SARS-CoV-2 infection, various phase 3 vaccine trials are underway. In the context of this pandemic, the present case demonstrates the challenges in our understanding of testing and treating immunocompromised patients.

Keywords: Antibodies, Coronavirus, Coronavirus Infections, COVID-19, Immunocompromised Host, Serologic Tests, Antibodies, Monoclonal, Humanized, Antineoplastic Agents, Immunological, COVID-19, COVID-19 Testing, Clinical Laboratory Techniques, Follow-Up Studies, Immunization, Passive, Lymphoma, Non-Hodgkin, Middle Aged, Pandemics, Pneumonia, Viral, Real-Time Polymerase Chain Reaction, Severity of Illness Index, Treatment Outcome

Background

In December 2019, hospitals in Wuhan, China, began reporting cases of severe pneumonia of unknown etiology [1]. Most of the initial identified patients were geographically linked to a local wet seafood market, where living and dead wild animals were sold. The virus rapidly spread to over 200 countries and territories [2]. Further sampling and genomic sequencing of respiratory tract specimens identified a novel coronavirus, severe acute respiratory syndrome coronavirus type 2 (SARSCoV-2), causing the 2019 pandemic known as coronavirus disease 2019 (COVID-19) [1]. Although mild upper respiratory tract infection characterizes most cases of COVID-19, severe outcomes have recently been identified in patients with secondary comorbidities [1]. Hypertension, cardiovascular diseases, and diabetes have been highlighted as potential risk factors for severe outcomes in COVID-19, as serum analysis of patients with these chronic diseases demonstrate higher levels of proinflammatory cytokines [1].

There is currently no known cure for COVID-19 disease; however, several COVID-19 vaccine trials are underway. Convalescent plasma is emerging as a potential therapy for COVID-19 because of its efficacy in treating previous viral infections such as Ebola, severe acute respiratory syndrome (SARS-CoV-1), and influenza A H1N1 [3]. To date, there is only anecdotal evidence to support the success of convalescent plasma use. However, there are 47 ongoing studies on convalescent plasma, including 22 randomized control trials, which will shed light on this potential therapy and help advance the development of a vaccine [4].

As our understanding of the pathogenesis of SARS-CoV-2 infection continues to evolve, and in the absence of a proven therapy or vaccine, diagnostic testing is a valuable tool to identify and isolate positive COVID-19 cases, especially in the immunocompromised population. Despite public health officials implementing extreme measures to isolate COVID-19 cases, most countries, including the United States, have been underprepared and, as a result, faced community transmission before testing was readily available to optimize early containment. The testing measures used in this case report included viral DNA detection and serological testing. The Sunrise Medical Laboratory obtained FDA emergency use authorization (EUA) as an established laboratory under the guidelines of the World Health Organization, with the cognizance of the possibility of false positives and false negatives of its nasopharyngeal reverse transcription polymerase chain reaction (RT-PCR) test (https://www.fda.gov/media/136598/download) [5]. SARS-CoV-2 antibody detection was done using the Abbott SARS-CoV-2 immunoglobulin G (IgG) reagent kit in combination with the SARS-CoV-2 IgG calibrator kit on the Abbott Architect i100SR and i200SR systems, which received FDA EUA (https://www.fda.gov/media/137384/download). This testing uses chemiluminescent microparticle immunoassay technology in which SARS-CoV-2 antibodies bind to paramagnetic microparticles and, after washing, bind to anti-human IgG acridinium-labeled conjugates, which are detected by chemiluminescence. Microsphere immunoassays have been used globally as methods to detect the presence of SARS-CoV-2 antibodies [6,7].

This report describes the case of an immunocompromised woman with a history of non-Hodgkin lymphoma with persistent SARS-CoV-2 infection, revealed by nasopharyngeal RT-PCR, who was seronegative and successfully treated with convalescent plasma.

Case Report

This is the case of a 63-year-old woman with a past medical history of non-Hodgkin lymphoma in remission while on maintenance therapy with the anti-CD20 monoclonal antibody, obinutuzumab. She developed symptoms 37 days following her last dose of obinutuzumab after exposure to a close contact who tested positive for SARS-CoV-2. The patient experienced fever, myalgia, and non-productive cough and subsequently tested positive for SARS-CoV-2 infection a few days later via nasopharyngeal RT-PCR testing from Sunrise Medical Laboratories. After 19 additional days of persistent symptoms, the patient presented to the emergency department (ED). Because the patient was stable, she was discharged from the ED to continue self-monitoring while home quarantined. With unresolving symptoms and the onset of chest palpitations, the patient presented to the ED again, then 32 days into illness, and was found to have new onset of atrial fibrillation with a rapid ventricular response. A computed tomography (CT) angiogram of the chest was performed and revealed no pulmonary embolism; however, there were new bibasilar rounded ground-glass opacities compared to a routine CT for lymphoma surveillance performed approximately 1 month prior to the onset of her initial symptoms (Figure 1). The patient was discharged home after receiving metoprolol for heart rate regulation and apixaban for anticoagulation. During quarantine adherence at home, the patient continued to feel symptomatic, and outpatient nasopharyngeal RT-PCR SARS-CoV-2 nucleic acid amplification testing was persistently positive on days 34, 48, and 74 of illness and undetectable for SARS-CoV-2 IgG antibodies on illness days 41 and 75. The patient was admitted to our hospital in June 2020, on day 88 of illness, and was administered convalescent plasma as per the Mayo Clinic’s Expanded Access to Convalescent Plasma for the Treatment of Patients with COVID-19 national clinical trial (NCT identifier: 04338360). One unit (approximately 200 mL) of compatible plasma was donated by COVID-19 survivors who had a confirmed laboratory diagnosis and had been symptom free for 14 days or more, with 1 aliquot removed to confirm SARSCoV-2 antibody presence by Ortho-Clinical Diagnostics VITROS Anti-SARS-CoV-2 IgG chemiluminescence immunoassay test [8].

On admission, the physical examination revealed that the patient had bilateral rhonchi and oxygen saturation of 100% on room air and was afebrile with a temperature of 37.1°C. Laboratory findings obtained on admission showed a normal leukocyte count with neutrophilic predominance and lymphopenia. Renal function testing was normal, and LDH and C-reactive protein levels were mildly elevated. The patient’s serum on illness day 88 was undetectable for IgG, and after the administration of plasma, repeat IgG testing was negative on day 89. Cryptococcal antigen, QuantiFERON, galactomannan, and Fungitell 1,3 beta-glucan assay tests were negative (Table 1). After convalescent plasma administration, the patient’s symptoms resolved, and she remained asymptomatic at a telemedicine follow-up visit 1 week later.

Discussion

SARS-CoV-2 is a Coronaviridae family non-retroviral RNA virus with large clinical diversity [9]. The family of coronaviruses (CoVs) has 4 subdivisions: alpha, beta, gamma, and delta [10]. SARS-CoV-2 is a member of the beta subdivision, along with the Middle East Respiratory Syndrome coronavirus and SARSCoV-1 [11]. The outer phospholipid bilayers of all CoVs contain a spike glycoprotein trimmer (S), a membrane protein (M), and an envelope protein (E), which surround the genomic RNA and a phosphorylated nucleocapsid protein (N) [12]. Unique to SARSCoV-2 is the longer and more molecularly divergent S proteins, which binds to human angiotensin-converting enzyme 2 (ACE2) in order for the virus to enter host cells [1]. In comparison to SARS-CoV-1, SARS-CoV-2 binds to ACE2 receptors with up to a 20-fold higher affinity, likely explaining the increased speed of human-to-human transmission [13]. Organs with increased expression of ACE2 receptors have a higher risk of SARS-COV-2 infection, such as the salivary glands, lung, heart, esophagus, kidney, bladder, ileum, testis, and brain, implicating many of the multi-organ complications that have been witnessed during this pandemic [14,15].

Upon entry into the cell via ACE2 receptors, the SARS-CoV-2 virus causes a severe inflammatory response by releasing higher levels of interleukin (IL)-2R, IL-6, IL-10, IL-17, and tumor necrosis factor-α [16,17]. It has been proposed that the mechanism of the inflammatory response to SARS-CoV-2 is biphasic, whereby, in the primary phase, active viral replication causes endothelial and epithelial cell apoptosis and vascular leakage, triggering a release of proinflammatory cytokines and chemokines [18]. In addition, pyroptosis, a highly inflammatory form of programmed cell death, occurs in macrophages and lymphocytes [18]. The S protein also downregulates ACE2 and induces ACE2 shedding during the primary phase, and loss of ACE2 function can cause acute lung injury and dysfunction of the renin-angiotensin system [19–21]. Renin-angiotensin system dysfunction then increases vascular permeability and inflammation. The secondary phase consists of adaptive immunity activation and the generation of neutralizing antibodies [18]. Neutralizing antibodies binding to protein S can alter inflammatory responses, leading to diffuse alveolar damage, although this mechanism remains unclear [22]. Immunocompromised patients may also have antibody-dependent enhancement during this phase. Antibody-dependent enhancement has been seen in dengue, influenza, and flavivirus and is a phenomena of virus-antibody immunocomplexes binding to cells with complement or Fc receptors promoting viral cell uptake [18,23]. Our understanding of the biological response to SARS-CoV-2 infection and the host’s immunological status is limited, as demonstrated by reports both refuting and supporting immunosuppression as a risk factor for more fatal COVID-19 outcomes [24].

Typically, non-retroviral RNA viruses have rapid viral replication and shedding presenting as an acute infection followed by a recovery phase, after which the individual has immunity against reinfection for varying periods of time [9]. Some non-retroviral RNA viruses, such as hepatitis C and some Coronaviridae viruses, have developed mechanisms to allow for persistent infections, although this has not yet been seen in SARS-CoV-2 [9]. Persistent viral infections resulting in chronic and recurrent pneumonias are rare. Recurrent pneumonia is defined as 2 or more distinct episodes of lower respiratory tract infections separated by either clearing visible on chest X-ray or a 1-month asymptomatic period, whereas chronic pneumonia lasts at least 6 weeks and is secondary to an infection [25]. The immune response to SARS-CoV-2 infection requires the activation of the innate and acquired immune systems in the biphasic response, as described above. The overactivation of T cells with a subsequent increase in TH17 and CD8+ T cells has been observed to be related to severe lung injury [18]. Since an immune response that is in overdrive may be the primary cause of organ damage, the anti-inflammatory effects of immuno-suppression may be protective against the cytokine storm related to COVID-19 outcomes [26].

The present case illustrates the dilemma of SARS-CoV-2 testing in immunocompromised patients. Although obinutuzumab has a half-life of only 28 days, this patient had symptoms persisting up to 126 days after immunotherapy administration [27]. Early in this pandemic, the oncological population was identified as an at-risk population [28]. Questions arose, for instance, regarding patients on immunosuppressive therapy and whether treatment should be delayed or used in conjunction with antibody testing prior to proceeding with chemotherapy or immunotherapy, such as in our patient with non-Hodgkin lymphoma [29]. It is unclear if this patient was re-infected after an initial period of improvement or, given her immunocom-promised status, if this was a persistent infection with variable immune responses to the administration of obinutuzumab.

Furthermore, most testing of SARS-CoV-2 viral RNA has been via PCR testing, and given that such tests are relatively new, it is important to note that the actual clinical sensitivity and specificity of these tests are unknown, further complicating the understanding of the true disease state of an individual with false positive and false negative results, especially in the immunocompromised population. Serological testing is still being developed and optimized and has limited availability. As laboratories continue to develop better immunoassays, further research is required to refine the current methods, and multiple tests need to be standardized on an international level to provide the adequate data reporting needed to appropriately contain the pandemic.

The patient’s lack of antibody response several days into her course of illness is also concerning, perhaps placing her at increased risk of repeat or persistent infection. Recent data suggest that SARS-CoV-2 IgG antibodies may have a more accelerated decay than SARS-CoV-2, and that the rate varies among those with mild vs. severe symptoms [30]. Furthermore, the protective role of antibodies against SARS-CoV-2 remains unclear, raising the concern that humoral immunity against the virus may not be long lasting in patients with mild illness. This notion is important moving forward with regards to vaccine durability, as multiple phase 3 vaccine trials are underway.

Conclusions

The present case demonstrates the difficulty in testing and treating immunocompromised patients for SARS-CoV-2 infection. Inconsistent observations show that the knowledge about the relationship between SARS-CoV-2 and host immune response status is limited. Further studies are required to elucidate the immune responses and inflammatory features of SARS-CoV-2 infection. According to the guidelines of the Centers for Disease Control, immunocompromised patients remain as high-risk to SARS-CoV-2 [31]. Close follow-up of these patients is required until more evidence and results from randomized control trials are available in this population. Until a validated viral culture is readily available and further studies truly define the protection and rate of decline of antiviral antibodies beyond 90 days, we can only postulate whether a chronic infectious state is possible in this disease [31,32].

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923