New insights from nanotechnology in SARS-CoV-2 detection, treatment strategy, and prevention.

The recent outbreak of SARS-CoV-2 resulted into the deadly COVID-19 pandemic, which has made a profound impact on mankind and the world health care system. SARS-CoV-2 is mainly transmitted within the population via symptomatic carriers, enters the host cell via ACE2 and TMPSSR2 receptors and damages the organs. The standard diagnostic tests and treatment methods implemented lack required efficiency to beat SARS-CoV-2 in the race of its spreading. The most prominently used diagnostic test,reverse transcription-polymerase chain reaction (a nucleic acid-based method), has limitations including a prolonged time taken to reveal results, limited sensitivity, a high rate of false negative results, and lacking specificity due to a homology with other viruses. Furthermore, as part of the treatment, antiviral drugs such as remdesivir, favipiravir, lopinavir/ritonavir, chloroquine, daclatasvir, atazanavir, and many more have been tested clinically to check their potency for the treatment of SARS-CoV-2 but none of these antiviral drugs are the definitive cure or suitable prophylaxis. Thus, it is always required to combat SARS-CoV-2 spread and infection for a better and precise prognosis. This review answers the above mentioned challenges by employing nanomedicine for the development of improved detection, treatment, and prevention strategies for SARS-CoV-2. In this review, nanotechnology-based detection methods such as colorimetric assays, photothermal biosensors, molecularly imprinted nanoparticles sensors, electrochemical nanoimmunosensors, aptamer-based biosensors have been discussed. Furthermore, nanotechnology-based treatment strategies involving polymeric nanoparticles, metallic nanoparticles, lipid nanoparticles, and nanocarrier-based antiviral siRNA delivery have been depicted. Moreover, SARS-CoV-2 prevention strategies, which include the nanotechnology for upgrading personal protective equipment, facemasks, ocular protection gears, and nanopolymer-based disinfectants, have been also reviewed. This review will provide a one-site informative platform for researchers to explore the crucial role of nanomedicine in managing the COVID-19 curse more effectively.

Colles' fracture: management by percutaneous crossed-pin fixation versus plaster of Paris cast immobilization.

Colles' fracture is the most common fracture seen in orthopedic practice, but no consensus has been reached on an effective method to maintain the initial reduction achieved. This prospective, randomized study of 50 patients evaluates the efficacy of maintaining reduction and consequent functional end results of two treatment methods, ie, percutaneous crossed-pin fixation followed by plaster of Paris cast immobilization with the wrist in functional position versus conventional plaster of Paris cast immobilization. The anatomical and functional end results were significantly better with percutaneous crossed-pin fixation at final follow-up.

Breastfeeding and childhood cancer.

Total duration of breastfeeding and of exclusive breastfeeding was studied and compared in 99 childhood cancer cases and 90 controls. The difference between the average duration of breastfeeding in cases and controls was significant (p < 0.05), but when average duration of exclusive breastfeeding was compared in cases and controls the difference was highly significant (p < 0.001). In lymphoma cases and controls the difference between the average duration of breastfeeding was moderately significant (p < 0.01). However, when average duration of exclusive breastfeeding was compared in lymphoma cases and controls the difference was highly significant (p < 0.001). When other cancer groups and controls were compared with respect to their total duration of breastfeeding and duration of exclusive breastfeeding the differences when insignificant (p > 0.05). Cases and controls were not different with respect to their age, sex, birth year, birth order, age and educational status of mothers, smoking of fathers and socioeconomic status. However, a positive family history of cancer was obtained in 4 (4%) of cases whereas in controls it was obtained in only 1 (1.1%).

PIP: Between April 1991 and June 1992 in India, physicians compared data on 99 childhood cancer cases with data on 90 sex, age, and hospital matched controls to examine the relationship between duration of total breast feeding and exclusive breast feeding and childhood cancer. Most of the children were patients at G.S.V.M. Medical College in Kanpur or at K.G. Medical College in Lucknow. Cases and controls were essentially the same in respect to birth order, age and educational status of mothers, smoking of fathers, and socioeconomic status. 65.7% of cases had leukemia. The duration of total breast feeding was significantly longer for controls than cases (10 months vs. 8 months; p .05). The difference between mean duration of exclusive breast feeding between mean duration of exclusive breast feeding between cases and controls was significant (4.6 months vs. 3.2 months; p .001). Controls were more likely to have undergone a longer duration of total breast feeding and exclusive breast feeding than were lymphoma cases (10 months vs. 6.15 months; p .01 and 4.6 months vs. 3 months; p .001, respectively). 58% of lymphoma cases had non-Hodgkins lymphoma. When the researchers compared other cancer groups and controls, no significant difference between the 2 groups existed in respect to total breast feeding and exclusive breast feeding. These results suggest that breast feeding has a protective effect against childhood cancer. Further, they indicate that exclusive breast feeding provides more beneficial immunological effects than breast feeding supplemented by artificial feeding. The high rate of breast feeding in India may explain the low incidence of childhood cancer in India (e.g., around 6/100,000 vs. 18/100,000 in Israel).

Maternal determinants of intra-uterine growth retardation.

Forty mothers with full term low birth weight babies and 30 age-matched mothers with full term normal birth weight babies were studied to find out the relative incidence of common maternal aetiological factors in the causation of intra-uterine growth retardation (IUGR). Attention was focussed to find out the relevance of the following factors: Age of the mother, weight of the mother, incidence of toxaemias of pregnancy, haemoglobin and serum protein values. It was observed that there was a statistically significant correlation between the incidence of IUGR and maternal weight of less than 45 kg and of toxaemia of pregnancy. Also, there was an increased association of IUGR with decreased value of haemoglobin and serum protein in mothers.