Toll-like receptors (TLRs) comprise a clan of proteins involved in identification and triggering a suitable response against pathogenic attacks. As lung is steadily exposed to multiple infectious agents, antigens and host-derived danger signals, the inhabiting stromal and myeloid cells of the lung express an aggregate of TLRs which perceive the endogenously derived damage-associated molecular patterns (DAMPs) along with pathogen associated molecular patterns (PAMPs) and trigger the TLR-associated signalling events involved in host defence. Thus, they form an imperative component of host defence activation in case of microbial infections as well as noninfectious pulmonary disorders such as interstitial lung disease, acute lung injury and airways disease, such as COPD and asthma. They also play an equally important role in lung cancer. Targeting the TLR signalling network would pave ways to the design of more reliable and effective vaccines against infectious agents and control deadly infections, desensitize allergens and reduce inflammation. Moreover, TLR agonists may act as adjuvants by increasing the efficiency of cancer vaccines, thereby contributing their role in treatment of lung cancer too. Overall, TLRs present a compelling and expeditiously bolstered area of research and addressing their signalling events would be of significant use in pulmonary diseases.
Study Design. Retrospective cohort analysis of a nationwide administrative database.Objective. The aim of this study was to analyze the association between cannabis abuse and serious adverse events following elective spine surgery. Summary of Background Data. Cannabis is the most popular illicit drug in the United States, and its use has been increasing in light of state efforts to decriminalize and legalize its use for both medical and recreational purposes. Its legal status has long precluded extensive research into its adverse effects, and to date, little research has been done on the sequelae of cannabis on surgical patients, particularly in spine surgery. Methods. The 2012-2015 Nationwide Inpatient Sample was queried for all patients undergoing common elective spine surgery procedures. These patients were then grouped by the presence of concurrent diagnosis of cannabis use disorder and compared with respect to various peri-and postoperative complications, all-cause mortality, discharge disposition, length of stay, and hospitalization costs. Propensity score matching was utilized to control for potential baseline confounders.Results. A total of 423,978 patients met inclusion/exclusion criteria, 2393 (0.56%) of whom had cannabis use disorder. After controlling for baseline characteristics and comorbid tobacco use, these patients similar inpatient mortality, but higher rates of perioperative thromboembolism (odds ratio [OR] 2.2; 95% confidence interval [CI] 1.2-4.0; P ¼ 0.005), respiratory complications (OR 2.0; 95% CI 1.4 -2.9; P < 0.001), neurologic complications such as stroke and anoxic brain injury (OR 2.9; 95% CI 1.2-7.5; P ¼ 0.007), septicemia/sepsis (OR 1.5; 95% CI 1.0 to 2.5; P ¼ 0.031), and nonroutine discharge (P < 0.001), as well as increased lengths of stay (7.1 vs. 5.2 days, P < 0.001) and hospitalization charges ($137,631.30 vs. $116,112.60, P < 0.001). Conclusion. Cannabis abuse appears to be associated with increased perioperative morbidity among spine surgery patients. Physicians should ensure that a thorough preoperative drug use history is taken, and that affected patients be adequately informed of associated risks.
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