The development of cytomegalovirus-induced adrenal failure in a patient with AIDS while receiving corticosteroid therapy

A large single-center cohort of bare lymphocyte syndrome: Immunological and genetic features in Turkey

Major histocompatibility complex class II (MHC-II) deficiency or bare lymphocyte syndrome (BLS) is a rare, early-onset, autosomal recessive, and life-threatening inborn error of immunity. We aimed to assess the demographic, clinical, laboratory, follow-up, and treatment characteristics of patients with MHC-II deficiency, together with their survival. We retrospectively investigated 21 patients with MHC-II deficiency. Female/male ratio was 1.63. The median age at diagnosis was 16.3 months (5 months-9.7 years). Nineteen patients (90.5%) had parental consanguinity. Pulmonary diseases (pneumonia, chronic lung disease) (81%), diarrhoea (47.6%), and candidiasis (28.6%) were common. Four (19%) had autoimmunity, two developed septic arthritis, and three (14%) developed bronchiectasis in the follow-up. Three patients (14%) had CMV viraemia, one with bilateral CMV retinitis. Eight (38.1%) had lymphocytopenia, and four (19%) had neutropenia. Serum IgM, IgA, and IgG levels were low in 18 (85.7%), 15 (71.4%), and 11 (52.4%) patients, respectively. CD4+ lymphocytopenia, a reversed CD4+/CD8+ ratio, and absent/low HLA-DR expressions were detected in 93.3%, 86.7%, and 100% of the patients, respectively. Haematopoietic stem cell transplantation (HSCT) was performed on nine patients, and four died of septicaemia and ARDS after HSCT. The present median age of patients survived is 14 years (1-31 years). Genetic analysis was performed in 10 patients. RFX5 homozygous gene defect was found in three patients (P1, P4 and P8), and RFXANK (P2 and P14) and RFXAP (P18 and P19) heterozygous gene defects were found in each two patients, respectively. This large cohort showed that BLS patients have severe combined immunodeficiency (SCID)-like clinical findings. Flow cytometric MHC-II expression study is crucial for the diagnosis, differential diagnosis with SCID, early haematopoietic stem cell transplantation (HSCT), and post-HSCT follow-up. Genetic studies are required first for matched family donor evaluation before HSCT and then for genetic counselling.

Adrenal Insufficiency: A Forgotten Diagnosis in HIV/AIDS Patients in Developing Countries

Adrenal insufficiency (AI) is one of the most common endocrine disease in patients with HIV/AIDS, leading to high morbidity and mortality in HIV patients who become critically ill. Various etiologies are associated with the condition, including cytomegalovirus (CMV), Mycobacterium tuberculosis, lymphoma, Kaposi's sarcoma, and drugs such as rifampin, among others. HIV patients with advanced disease develop relative cortisol deficiency largely due to the reduction of cortisol reserve, which predisposes patients to adrenal crisis in periods of stress or critical illness. The prevalence of AI in HIV/AIDS patients during HAART era is higher in developing than developed countries, probably due to limited access to both diagnosis and adequate treatments which increases the risk of opportunistic infections. The clinical features of functional adrenal insufficiency in HIV/AIDS patients can be masked by various infectious, noninfectious, and iatrogenic causes, which reduce clinical recognition of the condition. Development of simple screening algorithms may help clinicians reach the diagnosis when approaching these patients. In many low-income countries, most HIV patients are diagnosed with advanced disease; thus, further research is necessary to elucidate the prevalence of adrenal insufficiency in HIV/AIDS patients and the condition's impact on mortality in this population.

Adrenal crisis while on high-dose steroid treatment: what rheumatologist should consider?

Steroid treatment is commonly recommended for autoimmune disorders in rheumatology practice. While adrenal crisis may occur upon existence of an inducing factor in patients with known or unknown adrenal insufficiency as well as in those with a suppressed hypothalamic-pituitary-adrenal (HPA) axis due to chronic steroid use, addisonian crisis rarely develops in patients on supraphysiological doses of steroid and, when emerged, it might be very difficult to recognize. Here, we present a patient who developed adrenal crisis while receiving high-dose methylprednisolone treatment due to retroperitoneal fibrosis and we also discuss possible mechanisms with a brief literature review.

Multiple and atypical opportunistic infections in a HIV patient with Toxoplasma myocarditis

Opportunistic infections cause significant morbidity and mortality in patients infected with the human immunodeficiency virus (HIV). Multiple opportunistic infections can occur in a patient in the setting of severe immunodeficiency and can have atypical clinicoradiological presentation. Cardiac involvement has also been observed on autopsy in HIV-infected patients in the form of myocarditis, dilated cardiomyopathy, endocarditis, neoplasms, and drug-related cardiotoxicity. Mostly, the cardiac opportunistic infections are clinically asymptomatic, and sudden death due to these is extremely rare. We report a case of 44-year-old gentleman who presented with cough, pleuritic chest pain, and breathlessness and died of refractory shock due to myocarditis. At autopsy, he was found to have Toxoplasma myocarditis, Pneumocystis jirovecii pneumonia, and cytomegalovirus adrenalitis.

Primary adrenal failure due to viral infection in an infant

Acquired primary adrenal insufficiency is a rare disorder in childhood. The most common cause is autoimmune adrenalitis, especially as a part of polyendocrinopathy syndromes. Impaired adrenal function is seen in patients infected with HIV. In adult patients with AIDS, cytomegalovirus (CMV)-associated adrenal insufficiency is a well-known condition, whereas CMV infection as a causing adrenal insufficiency in children is very rare. Here, we report an infant with transient adrenal insufficiency associated with CMV infection but without HIV. She was treated successfully with steroid replacement and ganciclovir. Early diagnosis and treatment is lifesaving in these patients.

Cytomegalovirus-induced adrenal insufficiency in a renal transplant recipient

Cytomegalovirus (CMV) is an important pathogen in organ-transplant recipients. There have been frequent reports of CMV-induced adrenal insufficiency in patients with human immunodeficiency virus infection. Herein, we report CMV-induced renal insufficiency in a renal transplant recipient. A 24-year-old woman had gradual onset of weakness, anorexia, nausea, hypotension, and skin hyperpigmentation at 5 months after renal transplantation. The immunosuppression regimen included cyclosporine, mycophenolate mofetil, and corticosteroid (prednisolone, 5 mg/d). Recent history included acute CMV infection, which was treated with ganciclovir. Basal serum cortisol concentration was 4 microg/dL, and stimulated serum cortisol concentration was less than 10 microg/dL. All clinical signs and symptoms and hypotension gradually improved after the oral prednisolone dose was increased to 10 mg/d. Clinicians must be aware of the possibility of CMV-induced adrenal insufficiency in renal transplant recipients. The condition may be symptomatic despite low-dose prednisolone therapy.

Adrenal insufficiency associated with cytomegalovirus infection in two infants

Adrenal insufficiency associated with cytomegalovirus (CMV) is a well-described condition in adults with AIDS, however there is little information about CMV-associated adrenal insufficiency in childhood. The cases of two infants with negative HIV serology, presenting with CMV-associated adrenal insufficiency, are described. Clinical findings and therapeutic interventions are discussed with reference to the affinity of CMV infection for the adrenal gland. The differential diagnosis of adrenal insufficiency in newborns and infants should include CMV infection, and clinical suspicion of CMV-associated adrenal insufficiency should lead to early initiation of appropriate adrenal substitution therapy and ganciclovir antiviral therapy. Timely therapy for CMV-associated adrenal insufficiency can be lifesaving.

Detection of polyomaviruses and herpesviruses in human adrenal tumors

The presence of polyomaviruses and herpesviruses in adrenal tumors and their role in adrenal tumorigenesis has never been investigated, even though the adrenal gland seems to be a preferential site of infection by these viruses and adrenal steroid hormones have been shown to activate their replication. We examined in a large series of normal adrenal gland tissues (n=20) and adrenal tumors (n=107) the presence of herpesviruses and polyomaviruses sequences and gene expression, which were detected in a high proportion of both normal and neoplastic adrenal samples (overall, viruses were found in 15% normal adrenals, 27.8% benign adrenal tumors and 35.3% malignant tumors). The polyomaviruses SV40 and BK virus were more frequently found in malignant adrenal tumors, whereas herpesviruses, especially Epstein-Barr virus and human cytomegalovirus, were more frequently detected in functioning benign adrenocortical tumors, often as coinfection. Moreover, tumors from patients with severe hypercortisolism frequently showed herpesvirus coinfections at high viral genome copy number. Our study suggests that the adrenal gland could be a reservoir of infection for these viruses and that hormone overproduction by the adrenal gland could represent a trigger for virus reactivation. On the other hand, these viruses could also contribute to adrenal cell proliferation and tumorigenesis.

Fatal cytomegalovirus-associated adrenal insufficiency in an AIDS patient receiving corticosteroid therapy

A 35-year-old homosexual man, who had already received sulfamethoxazole/trimethoprim and steroid therapy because of human immunodeficiency virus (HIV)-related Pneumocystis jiroveci pneumonia, was referred to our hospital. He was also diagnosed as having cytomegalovirus (CMV) co-infection, and started receiving intravenous gancyclovir for CMV infection on the 2nd day of admission into our hospital. He had to continue the steroid therapy because his respiratory condition did not improve. On the 10th hospitalization day, when 40 mg of prednisolone was administered, cardiopulmonary arrest suddenly occurred, and his laboratory data showed hyponatremia and hyperpotassemia. In spite of resuscitation, he died two days later. The postmortem examination revealed that he died of adrenal failure due to CMV infection. In general, CMV is thought to cause adrenalitis, but rarely leads to manifestations of adrenal insufficiency during the clinical course. It is important to be aware that grave adrenal failure due to CMV infection can develop even under steroid therapy.

Adrenal infections

Adrenal infections are an important but under-recognized clinical entity. The adrenal gland can be infected by a myriad of pathogens including fungi, viruses, parasites, and bacteria. Infection can directly or indirectly cause tissue damage and alteration in endocrine function. Direct damage occurs via microbial replication and local production of toxic compounds, such as endotoxins. Indirect damage results from alterations in the regulation of a host's immunologic and endocrine mediators in response to damage by a microbe at a distant site. Variations in pathogen tropism, adrenal anatomy, and host immune integrity contribute to the progression of active disease and discernable adrenal dysfunction. Early recognition and intervention in the case of adrenal infection can significantly improve outcome, demonstrating the need for increased clinical suspicion in the appropriate clinical setting.

Nevirapine use in HIV-1-infected children

OBJECTIVES

To evaluate the safety, efficacy, and clinical, virological, and immunological responses in HIV-1-infected children receiving nevirapine as part of combination antiretroviral therapy (ART).

METHODS

A review of case notes of all HIV-1-infected children 96 weeks after starting nevirapine, under a national compassionate access scheme between August 1997 and March 1999 in the UK. Nevirapine was dosed according to the manufacturer's guidelines.

RESULTS

Seventy-four children (36 boys, 28 naive to ART) were enrolled, with a median age of 5.2 years, viral load of 5.1 log copies/ml and CD4 lymphocyte count of 13.5%. The liquid formulation and tablets of nevirapine were well tolerated. The proportions of patients achieving undetectable viral load levels at weeks 12, 24, 48 and 96 were 30, 40, 36 and 33%, respectively (intention-to-treat analysis). Of children not on a protease inhibitor who received more than 300 mg/m2/day of nevirapine, 60% had undetectable viral loads at week 96, compared with 17% on recommended doses. Outcomes were similar for patients receiving nevirapine once or twice daily. CD4 cell count percentages increased significantly, with median values sustained above 25% by week 48 onwards. Z-scores for weight and height increased significantly during 96 weeks of treatment. Rash occurred in 20%, of which four (5%) were severe. There were no cases of Stevens-Johnson syndrome.

CONCLUSION

Nevirapine was mostly well tolerated, and was associated with encouraging clinical and immunological responses. Virological responses in this cohort support the use of nevirapine doses greater than 300 mg/m2/day, which is higher than currently recommended by the manufacturers.