Prosthetic rehabilitation of an orbital and facial defect: a clinical report

For patients undergoing radical head and neck surgery, the deformity or physical defect adds to the agony. Rehabilitation of patients with such deformities is a challenge for the maxillofacial prosthodontist to enhance the esthetics and give psychological strength to the patient. This clinical report describes the rehabilitation, using a silicone prosthesis, of a large facial and orbital defect due to mucoepidermoid carcinoma.     

A novel 26 bp deletion [HBB: c.20_45del26bp] in exon 1 of the β-globin gene causing β-thalassemia major

Molecular characterization of β-thalassemia (β-thal) is essential in prevention and in understanding the biology of the disease. Deletion mutations are relatively uncommon in β-thal. In this report, we describe a novel 26 bp deletion from codon 6 to codon 14 in the β-globin in a consanguineous family from Tamil Nadu, India. This novel mutation causes a shift in the normal reading frame of the β-globin coding sequence, and consequently, a premature chain termination of translation due to the creation of a stop codon at the position of codon 21. The identification of this novel deletional mutation adds to the repertoire of β-thal mutations in India.     

Effects of statins and cholesterol on memory functions in mice

Studies on influence of lipid lowering therapies have generated wide controversial results on the role of cholesterol on memory function. However recent studies revealed that cholesterol lowering treatment substantially reduce the risk of dementia. The objectives of this study were to analyze the effect of statins on memory function and to establish the relationship between increase/decrease in cholesterol synthesis, total cholesterol level and memory function in animals. We examined the relationship between biosynthesis of cholesterol and memory function using two statins (lipophilic simvastatin and hydrophilic pravastatin) and high cholesterol diet in mice for 15?days and 4?months. Memory performance was evaluated with two different behavioral tests and various biochemical parameters such as serum cholesterol, whole brain cholesterol, brain 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) activity and brain acetylcholine esterase (AChE) activity. We found that statin treatment for 4?months, but not for 15?days, showed significant improvement in memory function whereas high cholesterol diet showed significant impairment of memory. However long-term statin treatment showed significant decrease in serum cholesterol level as well as brain AChE level. Moreover high cholesterol diet showed significant decrease in memory function with an increase in serum cholesterol level as well as brain AChE level. There is no direct correlation between brain cholesterol level, as well as HMG-CoA activity with memory function regulation. However there is definite link between plasma cholesterol level and AChE level. A long-standing plasma cholesterol alteration may be essential to regulate memory function which in turn might be mediated through AChE modulated pathway.     

Novel non-mulberry silk fibroin nanoparticles with enhanced activity as potential candidate in nanocarrier mediated delivery system

Silk fibroin (SF) is well known for its excellent biocompatible properties facilitating its application in the field of biomedical engineering through different biomaterial fabrications in the recent era. Here in this study, novel nanoparticles from non-mulberry SF of Antheraea assamensis were fabricated, characterized and evaluated for its applicability as nanocarrier. Fabricated nanoparticles were initially compared with prevailing SF nanoparticles from Bombyx mori. Fabricated A. assamensis silk fibroin nanoparticles (AA-SFNps) were found to be lesser in size (80–300 nm in diameter) than B. mori silk fibroin nanoparticles (BM-SFNps) (120–500 nm in diameter). When checked for stability, AA-SFNps were found to be more stable than BM-SFNps in biological media. FTIR and XRD studies revealed persistence of structural properties even after fabrication. TGA and DSC studies showed AA-SFNps to be thermally more stable than BM-SFNps without any cytotoxicity (MTT assay). On loading with model drug Doxorubicin hydrochloride (DOX), AA-SFNps exhibited an encapsulation efficiency of 94.47% with 11.81% loading of the anticancer drug. Cumulative release study revealed highest percentage release of DOX (42.1 ± 0.4%) at pH 5.2 on day 7 in comparison to pH 7.4 and 8.0. Sustained release profile of the DOX loaded AA-SFNps (AA-SFNps-DOX) was clearly reflected and it was found to be highly cytotoxic against triple negative MDA-MB-231 cells in comparison to free DOX at different time points. Overall, this study showed the efficacy of the AA-SFNps as a nanocarrier for future drug delivery applications.

Novel Antheraea assamensis silk fibroin nanoparticles (AA-SFNps) exhibiting enhanced activity as doxorubicin hydrochloride (DOX) loaded nanocarriers for future drug delivery applications.     

Polyacrylamide hydrogel (Bulkamid®) for stress urinary incontinence in women: a systematic review of the literature

Introduction and hypothesis

Polyacrylamide hydrogel (PAHG, Bulkamid®) is one of several injectable agents currently used for the treatment of women with urinary stress incontinence. Although bulking agents appear to have lower efficacy rates compared to other surgical treatments, current evidence based on large prospective or comparative studies as well as systematic reviews is limited. The purpose of this study was to conduct a systematic review on the efficacy of PAHG in the treatment of female patients with stress urinary incontinence with regard to reproducibility, feasibility, safety and clinical outcome.

Methods

We searched MEDLINE (1966–2015), Scopus (2004–2015), POPLINE (1974–2015) and ClinicalTrials.gov (2008–2015) along with reference lists of electronically retrieved studies. Observational studies, prospective, retrospective and randomized controlled studies were included. Two reviewers independently selected studies, assessed the risk of bias and tabulated data to structured forms.

Results

We included 8 studies, which enrolled a total of 767 patients who received treatment with PAHG. We found that 186 of 767 women (24.3 %, range 12–35 %) required reinjection in order to achieve adequate efficacy. The most frequent adverse effects were pain at the site of injection (4–14 %) and urinary tract infections (3–7 %). Both the number of incontinence episodes/24 h and the number of ml/24 h were significantly reduced 1 year following treatment and the quality of life of patients was significantly improved.

Conclusions

PAHG is a safe intervention for treating women with stress urinary incontinence, but repeat injections are often required. Further research is mandated in the field in order to compare its efficacy to other bulking agents.

     

Fertility preservation through gonadal cryopreservation

Fertility preservation is an area of immense interest in today's society. The most effective and established means of fertility preservation is cryopreservation of gametes (sperm and oocytes) and embryos. Gonadal cryopreservation is yet another means for fertility preservation, especially if the gonadal function is threatened by premature menopause, gonadotoxic cancer treatment, surgical castration, or diseases. It can also aid in the preservation of germplasm of animals that die before attaining sexual maturity. This is especially of significance for valuable, rare, and endangered animals whose population is affected by high neonatal/juvenile mortality because of diseases, poor management practices, or inbreeding depression. Establishing genome resource banks to conserve the genetic status of wild animals will provide a critical interface between ex-situ and in-situ conservation strategies. Cryopreservation of gonads effectively lengthens the genetic lifespan of individuals in a breeding program even after their death and contributes towards germplasm conservation of prized animals. Although the studies on domestic animals are quite promising, there are limitations for developing cryopreservation strategies in wild animals. In this review, we discuss different options for gonadal tissue cryopreservation with respect to humans and to laboratory, domestic, and wild animals. This review also covers recent developments in gonadal tissue cryopreservation and transplantation, providing a systematic view and the advances in the field with the possibility for its application in fertility preservation and for the conservation of germplasm in domestic and wild species.