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Briggs Risager posted an update 6 months, 3 weeks ago
While cigarette use in the U.S. has declined over time, smokeless tobacco (SLT) use has remained steady. Direct-mail advertising and coupon redemption have been linked to increased tobacco use, and efforts to promote SLT through direct-mail advertising may contribute to sustained SLT use. We examined reach of SLT direct-mail advertisements by recipient demographics and promotional features, including coupons.
Direct-mail data (n=418) were acquired from Comperemedia (Mintel) and coded for product type (traditional (e.g. chewing tobacco), pouched (e.g. moist snuff, snus), or both (traditional SLT and any pouched SLT products); promotions (e.g. coupons); flavors; and themes (e.g. masculinity). Using Mintel’s volume estimates for number of pieces sent, we calculated the proportion of mail volume sent by recipient demographics (age; income; region) and advertising features across product type.
Between July 2017-August 2018, tobacco companies sent an estimated 249 million pieces of SLT direct-mail to U.S. houen the limited success in reducing SLT use and the association between direct-mail promotions and tobacco use, these study results provide support for policies to restrict use of coupons in direct-to-consumer tobacco marketing and indicate the need for continued surveillance of direct-mail advertisements as the smokeless tobacco market continues to evolve.
There is a long history of research into tobacco advertising practices, largely focusing on cigarettes. This study highlights specific direct-mail marketing tactics used by the tobacco industry, including coupons to promote smokeless tobacco (SLT) products across the U.S. Given the limited success in reducing SLT use and the association between direct-mail promotions and tobacco use, these study results provide support for policies to restrict use of coupons in direct-to-consumer tobacco marketing and indicate the need for continued surveillance of direct-mail advertisements as the smokeless tobacco market continues to evolve.Central nervous system injury often causes lifelong impairment of neural function, because the regenerative ability of axons is limited, making a sharp contrast to the successful regeneration that is seen in the peripheral nervous system. Nevertheless, partial functional recovery is observed, because axonal branches of damaged or undamaged neurons sprout and form novel relaying circuits. Using a lot of animal models such as the spinal cord injury model or the optic nerve injury model, previous studies have identified many factors that promote or inhibit axonal regeneration or sprouting. Molecules in the myelin such as myelin-associated glycoprotein, Nogo-A or oligodendrocyte-myelin glycoprotein, or molecules found in the glial scar such as chondroitin sulfate proteoglycans, activate RhoA signaling, which leads to the collapse of the growth cone and inhibit axonal regeneration. By contrast, axonal regeneration programs can be activated by many molecules such as regeneration-associated transcription factors, cyclic AMP, neurotrophic factors, growth factors, mechanistic target of rapamycin or immune-related molecules. Axonal sprouting and axonal regeneration largely share these mechanisms. For functional recovery, appropriate pruning or suppressing of aberrant sprouting are also important. In contrast to adults, neonates show much higher sprouting ability. Specific cell types, various mouse strains and different species show higher regenerative ability. Studies focusing on these models also identified a lot of molecules that affect the regenerative ability. A deeper understanding of the mechanisms of neural circuit repair will lead to the development of better therapeutic approaches for central nervous system injury.
to review the evidence from studies relating SARS-CoV-2 culture with the results of reverse transcriptase polymerase chain reaction (RT-PCR) and other variables which may influence the interpretation of the test, such as time from symptom onset.
We searched LitCovid, medRxiv, Google Scholar and the WHO Covid-19 database for Covid-19 to 10 September 2020. We included studies attempting to culture or observe SARS-CoV-2 in specimens with RT-PCR positivity. Studies were dual extracted and the data summarised narratively by specimen type. Where necessary we contacted corresponding authors of included papers for additional information. find more We assessed quality using a modified QUADAS 2 risk of bias tool.
We included 29 studies reporting attempts at culturing, or observing tissue infection by, SARS-CoV-2 in sputum, nasopharyngeal or oropharyngeal, urine, stool, blood and environmental specimens. The quality of the studies was moderate with lack of standardised reporting. The data suggest a relationship between the identified by PCR. Prospective routine testing of reference and culture specimens and their relationship to symptoms, signs and patient co-factors should be used to define the reliability of PCR for assessing infectious potential. Those with high cycle threshold are unlikely to have infectious potential.Leaf angle is an important agronomic trait in cereals and shares a close relationship with crop architecture and grain yield. Although it has been previously reported that ZmCLA4 can influence leaf angle, the underlying mechanism remains unclear. In this study, we used the Gal4-LexA/UAS system and transactivation analysis to demonstrate in maize (Zea mays) that ZmCLA4 is a transcriptional repressor that regulates leaf angle. DNA affinity purification sequencing (DAP-Seq) analysis revealed that ZmCLA4 mainly binds to promoters containing the EAR motif (CACCGGAC) as well as to two other motifs (CCGARGS and CDTCNTC) to inhibit the expression of its target genes. Further analysis of ZmCLA4 target genes indicated that ZmCLA4 functions as a hub of multiple plant hormone signaling pathways ZmCLA4 was found to directly bind to the promoters of multiple genes including ZmARF22 and ZmIAA26 in the auxin transport pathway, ZmBZR3 in the brassinosteroid signaling pathway, two ZmWRKY genes involved in abscisic acid metabolism, ZmCYP genes (ZmCYP75B1, ZmCYP93D1) related to jasmonic acid metabolism, and ZmABI3 involved in the ethylene response pathway. Overall, our work provides deep insights into the ZmCLA4 regulatory network in controlling leaf angle in maize.
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