COVID-19 emergency: from a general hospital to a covid hospital in one week, an Italian experience.

Abstract: Aim of this letter is to describe the reconversion process of our general hospital, in just one week, into a COVID-19 Hospital. The working strategy allowed to quickly find the spaces, identify the working group, reshape the hospital organizational structure, redesign the flows and patient/health workers pathways. The hospital provided for a progressive activation of COVID-19 beds following the philosophy of the intensity of care. The main results were on management, flows, PPE and hygiene areas. Although some problems came out in the beginning, this fast hospital reconversion model may be replicated in the future to face similar epidemic or pandemic outbreaks.

The nuclear-encoded 18 kDa (IP) AQDQ subunit of bovine heart complex I is phosphorylated by the mitochondrial cAMP-dependent protein kinase.

In bovine heart mitochondria a protein of M(r) 18 kDa, phosphorylated by mtPKA, is associated to the NADH-ubiquinone oxidoreductase in the inner membrane and is present in purified preparation of this complex. The 18 kDa phosphoprotein has now been isolated and sequenced. It is identified as the 18 kDa (IP) AQDQ subunit of complex I, a protein of 133 amino acids with a phosphorylation consensus site RVS at position 129-131.

Topology of the mitochondrial cAMP-dependent protein kinase and its substrates.

In intact bovine heart mitochondria, cAMP-dependent phosphorylation of 42, 29, 18 and 6.5 kDa proteins was inhibited by carboxyatractyloside. This shows that both mitochondrial cAMP-dependent protein kinase (mtPKA) and its protein substrates are localized at the matrix side of the inner mitochondrial membrane. Proteins of 42, 29, 18, and 6.5 kDa were also bound at the outer surface of mitochondria where they were phosphorylated by the added purified catalytic subunit of PKA. In the cytosol from bovine heart proteins of the above molecular weights were phosphorylated by the cytosolic PKA.

Characterization of proteins phosphorylated by the cAMP-dependent protein kinase of bovine heart mitochondria.

Characterization of two mitochondrial proteins of M(r) 42 and 18 kDa, respectively, phosphorylated by the cAMP-dependent protein kinase of bovine heart mitochondria (mtPKA), is presented. A 42 kDa protein is found to be loosely associated to complexes I, III and IV of the respiratory chain and complex V (ATP synthase) in the inner mitochondrial membrane. An 18 kDa protein is associated to complex I in the inner membrane and in a purified preparation of this complex where it can be phosphorylated by the isolated catalytic subunit of PKA.

Levels of the bcl-2 protein, fibronectin and alpha(5)beta(1) fibronectin receptor in HIV-1-infected patients with Kaposi's sarcoma.

Kaposi's sarcoma (KS) is an angioproliferative disease characterized by proliferation of neoplastic cells (spindle cells) mixed with endothelial and inflammatory cells. In this study we evaluated the role of the adhesive glycoprotein, fibronectin (FN) and its receptor alpha(5)beta(1) (FNR), and the proto-oncogene bcl-2, an anti-apoptotic protein. Significantly decreased serum levels of FN were noted in HIV-1-infected patients with KS, whereas serum levels of FNR were significantly increased in the same patients. Furthermore, increased FNR expression was observed on CD4 cells from KS patients. Serum levels of bcl-2 protein were significantly decreased in asymptomatic seropositive patients, whereas HIV-1-infected patients with KS showed increased serum levels of bcl-2. These results provide further information about interaction between integrins and the extracellular matrix and bcl-2 protein that can support cell survival either of neoplastic cells or endothelial and inflammatory cells.

Effect of recombinant IL-1 beta and recombinant gamma interferon on septic acute lung injury in mice.

The effect of recombinant human interleukin 1B (IL-1B) and recombinant human gamma interferon (IFN-g), when given prophylactically, in a mouse model of septic acute lung injury was studied. Mice were treated with various doses of IL-1B and IFN-g for 3 consecutive days prior to administration of lipopolysaccharide of Escherichia coli (1 mg/kg given intraperitoneally). To determine the histologic changes occurring after prophylactic administration of such cytokines, a scoring system was assessed. A significant reduction of edema and neutrophil accumulation into the lungs of mice was observed, especially at doses of 100 U per mouse and 10,000 U per mouse of IL-1B and IFN-g, respectively. Prophylactic administration of IL-1B or IFN-g caused histologic changes, including marked reduction of edema and neutrophil accumulation in the interstitial and alveolar spaces. Combined prophylactic administration of IL-1B and IFN-g provoked a marked decrease of neutrophil accumulation into the lungs, but was not accompanied by significant reduction of edema or hemorrhage. These results provide evidence for the beneficial role of IL-1B and IFN-g in the abnormality of septic acute lung injury by reducing inflammatory lesions.

Expression of the alpha 5 beta 1 fibronectin receptor on T lymphocytes of patients with HIV-1 infection.

AIMS: To evaluate the expression of the alpha 5 beta 1 integrin fibronectin receptor (FNR), which mediates several processes, including phagocytosis, cell motility and the immune response, on T lymphocytes of patients with HIV-1 infection. METHODS: T lymphocytes were incubated with monoclonal antibody directed against FNR and then with monoclonal antibodies, conjugated with phycoerythrin, directed against CD3, CD4 and CD8 positive cells. Expression of FNR on CD3, CD4 and CD8 positive cells was analysed using flow cytometry. RESULTS: Normal expression of FNR was observed on CD3 positive cells from asymptomatic HIV positive patients and those with AIDS. Increased expression of FNR was observed on CD8 positive cells from asymptomatic HIV positive patients and on CD4 positive cells from patients with AIDS. Increased FNR expression was observed on CD4 positive cells from patients with AIDS, particularly those with opportunistic infections caused by Pneumocystis carinii, Mycobacterium sp, Toxoplasma gondii, and Cryptococcus neoformans. CONCLUSION: Increased expression of FNR on CD8 and CD4 positive cells in asymptomatic HIV positive patients and those with AIDS, respectively, may be an epiphenomenon correlated with lymphocyte activation by HIV-1 or opportunistic infection, Further study is required to determine whether upregulation of FNR expression has a direct role in the pathogenesis of AIDS.

Cerebrospinal fluid concentration of fibronectin in meningitis.

Fibronectin concentrations in the cerebrospinal fluid were assessed in 20 patients with acute meningitis using a turbidimetric immunoassay. A significant increase in fibronectin concentrations was observed in patients with bacterial meningitis; decreased concentrations were observed in patients with viral meningitis. The determination of fibronectin concentration in patients with bacterial meningitis may represent a useful marker in differentiating bacterial from viral meningitis.

Serum concentrations of nitrite in patients with HIV-1 infection.

AIMS: To measure circulating concentrations of nitrite in patients with HIV-1 infection. METHODS: Nitrite concentrations were measured using the Griess reaction adapted to microtitre plates in the serum of 10 asymptomatic HIV-1 positive patients, 33 patients with AIDS with cerebral disorders, 17 patients with AIDS with pulmonary involvement, and in eight patients with AIDS with other disorders. Nitrite concentrations were also measured in bronchoalveolar lavage (BAL) fluid and cerebrospinal fluid (CSF) of patients with AIDS with pulmonary involvement and cerebral disorders, respectively. RESULTS: Increased serum concentrations of nitrite were observed in patients with pulmonary involvement, and in particular in serum and in BAL samples of patients with interstitial pneumonia (36.2 (26.2) mumol/l and 0.3 (0.4) mumol/l, respectively). Increased serum concentrations of nitrite were also noted in patients with retinitis caused by infection with cytomegalovirus. Serum nitrite concentrations were also raised in patients with cerebral toxoplasmosis, whereas normal serum concentrations were found in patients with HIV-1 encephalopathy and cryptococcal meningitis. Nitrite concentrations in CSF were not raised in patients with cerebral disorders. CONCLUSIONS: These results suggest that production of nitrite in patients with AIDS with concomitant opportunistic infections may be part of the host defense against opportunistic organisms.

Nevirapine or efavirenz combined with two nucleoside reverse transcriptase inhibitors compared to HAART: a meta-analysis of randomized clinical trials.

PURPOSE: A meta-analysis of randomized controlled trials (RCTs) was performed to evaluate effectiveness and tolerability of triple antiretroviral therapy regimens in HIV-infected patients. METHOD: RCTs including the nonnucleoside reverse transcriptase inhibitors (NNRTIs) nevirapine (NVP) or efavirenz (EFV) compared to two nucleoside reverse transcriptase inhibitor (NRTI) regimens and to three-drug regimens based on two NRTIs and one protease inhibitor (PI; highly active antiretroviral therapy [HAART]) were analyzed by Peto's method. RESULTS: A significant virological response was observed in patients treated with NNRTIs (odds ratio [OR] 3.6; 95% CI, 2.2-6.0), particularly in naïve patients (OR 7.4; 95% CI, 4.1-13.5). A fair reduction of HIV disease progression was also observed in patients treated with NNRTIs (OR 0.8; 95% CI, 0.6-1.0). Moreover, a significantly lower rate of HIV progression was observed in patients with a CD4 + lymphocyte count below 100/mm(3). Five RCTs comparing two NRTIs and one NNRTI to HAART were subsequently evaluated. A slightly higher rate of virological response was observed with NNRTIs (OR 1.6; 95% CI, 1.1-2.1), whereas no difference was observed concerning progression of HIV disease. CONCLUSION: Antiretroviral therapy including NVP or EFV was more effective in reducing viral load than therapy with only two NRTIs and was slightly more effective than HAART. Effectiveness in delaying HIV disease progression was less evident, even though lower rate of progression was observed in patients with advanced HIV infection compared to two NRTIs alone.

In vitro and in vivo induction of nitric oxide by murine macrophages stimulated with Bordetella pertussis.

Nitric oxide (NO) exhibits potent antimicrobial activity in vitro. The function of NO in host defenses in vivo, however, is presently unclear. Experiments were undertaken to determine the production of NO in vitro from murine peritoneal and alveolar macrophages, and murine macrophage cell line (J774A.1) stimulated with Bordetella pertussis or pertussis toxin (PT). In addition, we determined circulating levels of NO in the sera and bronchoalveolar lavage (BAL) fluids of mice infected intranasally with B. pertussis. The results of this study showed that in vitro murine peritoneal macrophages induce production of NO in response to B. pertussis and PT. In addition, murine macrophage cell line, J774A.1 also induces NO production after stimulation with B. pertussis. NO production was also detected in alveolar macrophages from mice infected intranasally with B. pertussis. Finally, a significant increment of circulating levels of NO was noted, in the sera but not in the BAL fluids, of mice infected intranasally with B. pertussis.

Effects of recombinant human gamma interferon on intracellular survival of Bordetella pertussis in human phagocytic cells.

Several studies have demonstrated that Bordetella pertussis has the ability to enter and survive intracellularly within human polymorphonuclear leukocytes (PMNL) and human monocytes/macrophages. The effects of human recombinant gamma interferon (IFN-gamma) on the survival of B. pertussis in PMNL and human monocytes, and on the oxidative burst activity of PMNL and human monocytes in response to B. pertussis were assessed in this study. IFN-gamma partially increased intracellular killing of phagocytosed B. pertussis in human monocytes, as determined by an orange acridine-crystal violet assay. In contrast, IFN-gamma did not enhance intracellular killing of B. pertussis in PMNL. No significant increase of superoxide production was noted in human monocytes in response to B. pertussis when stimulated with various concentrations of IFN-gamma. The partial increase of B. pertussis killing by IFN-gamma within monocytes, together with poor production of superoxide may explain how B. pertussis can survive within human phagocytic cells, and thus cause a more prolonged course of the disease.

Serum levels of interleukin-18 in patients with uncomplicated Plasmodium falciparum malaria.

Interleukin (IL)-18, a newly discovered cytokine produced primarily by macrophages, has been shown to induce gamma interferon (IFN-gamma) production by natural killer cells, to induce the T helper type 1 response. To further elucidate the role of this cytokine in uncomplicated malaria caused by Plasmodium falciparum, serum levels of IL-18, and gamma interferon (IFN-gamma), determined by an immunoenzymatic assay, were analyzed in 40 adult patients, and in 15 healthy control subjects. A significant increase in serum levels of IL-18 was observed in patients with uncomplicated P. falciparum malaria on admission, whereas serum levels of IFN-gamma tended to increase although not significantly. Serum levels of IL-18 decreased three days later, but still remained significantly high, whereas IFN-gamma levels returned to normal levels compared to the controls. No significant correlation was found between parasitemia and serum levels of IL-18 and IFN-gamma. The increase of IL-18 levels during acute and recovery phases of uncomplicated P. falciparum malaria may reflect a proinflammatory role of IL-18 in these patients. An early and effective immune response regulated by proinflammatory Th1 cytokines, including tumor necrosis factor (TNF), interleukin (IL)-12, and possibly IFN-gamma may limit the progression from uncomplicated malaria to severe and life-threatening complications.

Effects of interleukin-8 on suppression of human lymphocyte polarization and migration by anti-LFA-1 antibody.

We investigated the role of lymphocyte function-associated antigen 1 (LFA-1) in human T cell polarization and migration assay by using monoclonal antibody specific to beta chain (CD18) and alpha chain (CD11a). T cell polarization in response to fetal calf serum (FCS) and colchicine was suppressed by the addition of CD18 and CD11a antibodies. Furthermore, T cell migration in response to lymphocyte chemotactic factor (LCF) and casein was markedly depressed by the addition of CD18 and CD11a antibodies. Additional studies to evaluate effects of interleukin 8 (IL-8) on polarization and migration of T cells preincubated with CD18 or CD11a antibody showed that IL-8 restored the capability of migration of T cells, whereas did not restore polarization activity of such cells. These studies indicate that LFA-1 plays a role in the polarization and migration of T cells and that IL-8 may positively interfer with LFA-1-adhesion molecules.

Binocular detection of masked patterns in young and old observers.

A visual pattern embedded in noise is detected appreciably better when the stimulus complex contains interocular cues (dichoptic condition) than when such cues are absent (binoptic condition). In a recent study (F. Speranza, G. Moraglia, & B. A. Schneider, 1995) the authors showed that the relative difference between binoptic and dichoptic thresholds does not change with age. However, older adults showed higher binoptic and dichoptic thresholds, thus suggesting an age-related difficulty with degraded stimulation. In this article the authors first replicated these findings and proceeded next to investigating whether age-related changes in processing efficiency, additive internal noise, and the spatial frequency bandwidth of the detecting filters could account, separately or concurrently, for the elevated thresholds in noise exhibited by the older adults. Results indicate that this increase is not attributable to age-related changes in filter bandwidth or internal noise. Rather, the findings can be explained in terms of a decrease in processing efficiency with age.

How aging affects the reading of words in noisy backgrounds.

Young and old adults were shown simple sentences masked by visual noise. In half of the sentences, the final word was predictable; in the other half, it was not. The older participants were able to identify the same number of final words as the younger ones only when the intensity of the visual noise was significantly diminished. However, the difference in the number of correct identifications between predictable and unpredictable conditions was higher for the older observers than for the younger observers, indicating that older observers benefit from context more.

A retrospective study of treatment of cerebral toxoplasmosis in AIDS patients with trimethoprim-sulphamethoxazole.

AIMS OF THE STUDY: a retrospective study was designed to evaluate efficacy and tolerance of trimethoprim-sulphamethoxazole (TMP-SMZ) in AIDS patients with cerebral toxoplasmosis (TE). PATIENTS AND METHODS: we reviewed 471 patients with AIDS, and we analysed 71 AIDS patients with TE, who received intravenous therapy with TMP-SMZ (TMP: 10 mg/kg/day, SMZ: 50 mg/kg/day) for 4 weeks. RESULTS: 35 patients (49.2%) had a complete regression of clinical signs, and a complete resolution of radiological lesions was noted in 41 patients (57.7%). Improvement of clinical signs and radiological lesions were observed in 27 patients (38%), and in nine patients (12.6%), respectively. In contrast, nine patients (12.6%) did not show any clinical change, or worsened. Twenty-two patients (30.9%) suffered from adverse cutaneous reactions, whereas many patients had haematological toxicity. CONCLUSIONS: TMP-SMZ seems to be an efficient therapy for TE in AIDS patients, although further prospective, randomized therapeutic trials are required to confirm these results.

A retrospective study on the efficacy and safety of amphotericin B in a lipid emulsion for the treatment of cryptococcal meningitis in AIDS patients.

To evaluate the efficacy and safety of Amphotericin B dissolved in dextrose (Amb) or in a lipid emulsion (Intralipid, Amb-IL) in AIDS patients with cryptococcal meningitis, we conducted a retrospective study in 30 AIDS patients with cryptococcal meningitis. A clinical complete resolution was obtained in 11 patients (55%) treated with Amb, and in six patients (60%) treated with Amb-IL. Intralipid did not decrease the infusion-related adverse effects, in particular nephrotoxicity and anaemia. Our results indicate that Amb-IL formulation is useful in the treatment of cryptococcal meningitis in AIDS patients, but it does not reduce the infusion-related adverse events.

Age-related changes in binocular vision: detection of noise-masked targets in young and old observers.

This study investigated the effects of age on binocular unmasking. This term denotes the fact that a visual signal embedded in noise is detected appreciably better when the stimulus complex contains interocular cues (dichoptic condition) than when such cues are absent (binoptic condition). Detection thresholds for two Gabor signals differing in spatial frequency were determined in young and old adults with no identifiable ocular pathologies. The signals were embedded, in both conditions, in two-dimensional Gaussian noise. Binocular Masking Level Differences, defined as the difference between the binoptic thresholds and the dichoptic thresholds, did not change with age; however, the older adults showed higher binoptic thresholds with both signals and higher dichoptic thresholds with only the lower-spatial-frequency signal. For both groups, binoptic and dichoptic thresholds increased with spatial frequency. The implications of these results are discussed.

Production and release of tumor necrosis factor alfa, interleukin-1B and interleukin-6 by human mononuclear leukocytes stimulated with pertussis toxin.

Pertussis toxin (PT) has been previously shown to affect a wide variety of immune responses and to cause lymphocyte proliferation. In this study, we examined the effect of PT on cultured human peripheral blood lymphocytes and monocytes with the regard to the capability of this toxin to stimulate the production and release of various cytokines. PT was found to induce the production and release of Tumor Necrosis Factor alfa (TNF-alfa) and Interleukin-6 (IL-6) by both human lymphocytes and monocytes and IL-1 (IL-1B) beta by human monocytes in culture. Most activities of PT in vitro were achieved at the optimal concentration range of 1-0.01 microgram/ml, which is responsible for the adjuvant effect of PT in vivo. Since TNF-alfa, IL-1 beta and IL-6 are potent mediators of inflammation, the production and release of these cytokines by PT and Bordetella pertussis itself may play an important role in antibacterial defenses against such infection.