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Based on the findings of recent case studies of COVID-19 patients, researchers reviewed the role of smoking and vaping that may play in the cerebrovascular and neurological dysfunction of those who contract the virus.The study led by Cucullo and TTUHSC graduate research assistant Sabrina Rahman Archie, "Cerebrovascular and Neurological Dysfunction under the Threat of COVID-19: Is There a Comorbid Role for Smoking and Vaping?" was published in the International Journal of Molecular Sciences.As the SARS-CoV-2 virus or COVID-19 has unfurled its tentacles across the globe, the severe respiratory and pulmonary disorders associated with the infection have become well known. However, recent case studies also have strongly suggested the presence of cerebrovascular-neurological dysfunction in COVID-19 patients, including large artery ischemic strokes that originate in one of the brain's larger blood-supplying arteries such as the carotid.Luca Cucullo, Ph.D., and other researchers from the Texas Tech University Health Sciences Center (TTUHSC) have for years studied the effects smoking and vaping have on the cerebrovascular and neurological systems. Their research, and that of others, has shown smokers of tobacco and vaping products are more vulnerable to viral and bacterial infection than are non-smokers.In his previous research, Cucullo demonstrated how tobacco smoke can impair a person's respiratory function. From there, it can affect the vascular system and eventually the brain. Because COVID-19 also attacks the respiratory and vascular systems, he and Archie wanted to see if there were any reported cases indicating the virus may also affect the brain and lead to the onset of long-term neurological disorders like ischemic strokes. They also looked for evidence showing smoking and vaping can otherwise worsen the outcomes for COVID-19 patients, which Cucullo said seems to be the case.Archie said some case studies demonstrate there are indeed stroke occurrences in COVID-19 patients and the rates appear to be increasing every day. In fact, one study comprised of 214 patients found that 36.45% of COVID patients had neurological symptoms, further indicating the virus is able to affect the cerebral vascular system. But how does this happen?There are within the human body approximately 13 blood coagulation factors that can be increased due to hypoxia, a condition that occurs when the body is deprived of sufficient amounts of oxygen at the tissue level, as occurs with smoking. Archie said COVID-19 appears to also raise some blood procoagulant, especially the von Willebrand Factor, a blood-clotting protein that primarily binds carries coagulation factor VIII and promotes platelet adhesion at the site of wounds."When the coagulant factor will be increased in our body, there will be a higher chance of clot formation," Archie explained. "Ultimately, it will be responsible for several vascular dysfunctions, for example, hemorrhagic or ischemic stroke."Because COVID-19 and smoking or vaping each increases blood coagulation factors that may eventually affect the cerebral vascular system, Cucullo believes the stroke risk may be higher still for COVID-19 patients who smoke."COVID-19 seems to have this ability to increase the risk for blood coagulation, as does smoke," Cucullo added. "This may ultimately translate in higher risk for stroke."Recent clinical study data also shows some of the damage caused by COVID-19, especially to the respiratory system, is permanent. Cucullo said the same data indicates that patients who recover from COVID-19 still have an elevated risk for stroke and that age and physical activity don't seem to be factors. Some of those with the highest risk factors for long-term problems related to COVID-19 are young adults in their 20s and 30s who were active and considered to be in their physical prime."After COVID-19, some of those can barely take few steps without having breathing issues, so the recovery, it's kind of formal recovering, but some of these long-term effects remain," he added.In addition to impairing the immune and vascular systems, and triggering cerebrovascular and neurological dysfunction, smoking and vaping often worsen the outcomes for patients who contract influenza or other respiratory or pulmonary diseases. Because COVID-19 appears to affect many of the same systems within the body, Cucullo said it would seem logical to think the health risks are increased for COVID-19 patients who smoke, but the virus is too new to know for certain."We don't even know whether COVID-19 can get into the brain because nobody has actually checked for it yet," Cucullo said. "I think it's very early for this kind of study; the prime clinical concern is either a vaccine or trying to alleviate the symptoms, in particular the respiratory symptoms, so they didn't even get that far. We are planning to do something from that point of view; this is something we will definitely research."( With inputs from ANI )

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