Lifeboat Foundation

The role of nitric oxide synthase (NOS) in the pathophysiology of acute respiratory distress syndrome (ARDS) is not well understood. Inducible NOS is upregulated during physiologic stress; however, if NOS substrate is insufficient then NOS can uncouple and switch from NO generation to production of damaging peroxynitrites. We hypothesized that NOS substrate levels are low in patients with severe sepsis and that low levels of the NOS substrate citrulline would be associated with end organ damage including ARDS in severe sepsis.

Plasma citrulline, arginine and ornithine levels and nitrate/nitrite were measured at baseline in 135 patients with severe sepsis. ARDS was diagnosed by consensus definitions.

Plasma citrulline levels were below normal in all patients (median 9.2 uM, IQR 5.2 — 14.4) and were significantly lower in ARDS compared to the no ARDS group (6.0 (3.3 — 10.4) vs. 10.1 (6.2 — 16.6), P = 0.002). The rate of ARDS was 50% in the lowest citrulline quartile compared to 15% in the highest citrulline quartile (P = 0.002). In multivariable analyses, citrulline levels were associated with ARDS even after adjustment for covariates including severity of illness.

2004…

https://www.ijidonline.com/article/S1201-9712(04)00052-9/fulltext

“During the SARS epidemic, Chen and colleagues included inhalation of NO gas in the treatment of a number of SARS patients. Medicinal NO gas, a gaseous blend of nitric oxide (0.8%) and nitrogen (99.2%), was given for three days or longer, initially at 30 ppm and then at 20 and 10 ppm on the second and third day (unpublished data). Their findings suggest not only an immediate improvement of oxygenation but also a lasting effect on the disease itself after termination of inhalation of NO.

Continue reading “Inhibition of SARS-coronavirus infection in vitro” »

Many virus infections elicit vigorous host immune responses, both innate and acquired. The immune responses are frequently successful in controlling and then clearing the virus, using both cellular effectors such as natural killer (NK) cells and cytolytic T lymphocytes and soluble factors such as interferons (IFNs). However, some immune responses lead to pathologic changes or are unable to prevent the pathogen’s growth. This review will not be devoted to the different strategies viruses have taken to promote their transmission or survival but rather to one aspect of the innate immune response to infection: the role of nitric oxide (NO) in the antiviral repertoire. Recently, data from many laboratories, using both RNA and DNA viruses in experimental systems, have implicated a role for NO in the immune response. The data do not indicate a magic bullet for all systems but suggest that NO may inhibit an early stage in viral replication and thus prevent viral spread, promoting viral clearance and recovery of the host.

The earliest host responses to viral infections are nonspecific and involve the induction of cytokines, among them, IFNs and tumor necrosis factor alpha (TNF-α). Gamma IFN (IFN-γ) and TNF-α have both been shown to be active in many cell types and induce cascades of downstream mediators (reviewed in references 25, 34, and 41). Others have found that NO synthase type 2 (NOS-2, iNOS) is an IFN-γ-inducible protein in macrophages, requiring IRF-1 as a transcription factor (12, 17). We have observed that the isoform expressed in neurons, NOS-1, is IFN-γ, TNF-α, and interleukin-12 (IL-12) inducible (20). Thus, NOS falls into the category of IFN-inducible proteins, activated during innate immune responses.

NO is produced by the enzymatic modification of l-arginine to l-citrulline and requires many cofactors, including tetrahydrobiopterine, calmodulin, NADPH, and O₂. NO rapidly reacts with proteins or with H₂O₂ to form ONOO⁻, peroxynitrite, which is highly toxic (Fig. (Fig.1). 1 ). NO also readily binds heme proteins, including Hb and its own enzyme.

Neuroscientists have just created an artificially intelligent algorithm that detects human brain activity and translates it into English sentences—and they said it was the first time such translations could be done on a 1:1 speed with natural human speech; faster-than-light.

#Repost “Some doctors are experimenting with adding nitric oxide to the mix, to help improve blood flow and oxygen to the least damaged parts of the lungs.”

Ironically enough nitric oxide improves blood oxygen flow, and also clears blood clots. Some patients who survive COVID19 have clots in the blood vessels in their lungs. We just have to wait and see.

(NEW YORK) — As health officials around the world push to get more ventilators to treat coronavirus patients, some doctors are moving away from using the breathing machines when they can. The reason: Some hospitals have reported unusually high death rates for coronavirus patients on ventilators, and some doctors worry that the machines could be harming certain patients.

Continue reading “Why Some Doctors Are Now Moving Away From Ventilator Treatments for Coronavirus Patients” »

Quarantine amid coronavirus could boost the nascent practice of seeking romance and friendship from artificial intelligence.

An early analysis of remdesivir, a drug developed by pharmaceutical firm Gilead, has shown that it may have improved severe symptoms of COVID-19 in 68% of patients after 18 days.

For the Gilead-funded study, doctors recruited 61 patients hospitalized with COVID-19 with oxygen saturation of 94% or less while breathing ambient air or receiving oxygen support. To receve remdesivir on a compassionate use basis (a program allowing the use of unapproved medicines when no other treatment options are available), on the first day of treatment, patients were administered 200mg of remesdevir, and then 100 mg daily on the remaining 9 days of treatment.

Continue reading “Remdesivir Improves COVID-19 Symptoms in 68% of Patients in Early Study” »

The FDA issued the emergency authorization to use blood purification devices to treat coronavirus patients on Friday.

Forced to stay at home amid the coronavirus pandemic, more residents of Christianburg, Virginia, are ordering from a pilot drone residential delivery service run by Google parent Alphabet. The most popular items: Coffee, toilet paper and cookies.