Allelic and genotypic frequencies in polymorphic Booroola fecundity gene and their association with multiple birth and postnatal growth in Chhotanagpuri sheep

AIM

Chhotanagpuri breed of sheep reared for mutton in Jharkhand, India, having problem of low litter size and body weight. The response of genetic improvement for traits with low heritability through traditional selection method is time-consuming. Therefore, marker-assisted selection based on a polymorphism study of suitable candidate gene can response quickly. Thus, this study was aimed at identification of different allelic and genotypic frequencies of Booroola fecundity (FecB) gene and its association with multiple birth and postnatal growth in Chhotanagpuri sheep.

MATERIALS AND METHODS

DNA isolation and gene-specific amplification of FecB gene was performed from blood samples of from 92 Chhotanagpuri lambs maintained under similar feeding and management conditions. Custom nucleotide sequencing and single-strand conformational polymorphism analysis were performed to identify different genotypes with respect to the target gene. Statistical analysis was performed for determination of allelic and genotypic frequencies of FecB gene polymorphisms and its association with multiple birth and postnatal growth of lambs from birth to 52 weeks age.

RESULTS

"AA," "AB," and "BB" genotypes were found at locus-1 as it is polymorphic for FecB gene while locus-2 was found to be monomorphic for FecB gene. Higher frequency of "A" allele at locus-1 was found in single born lambs, whereas "B" allele was predominant among multiple born lambs. The lambs having "BB" genotype weighed significantly (p≤0.01) heavier than those of "AB" and "AA" genotype at 52 weeks of age.

CONCLUSION

"BB" genotype has emerged as favored genotype for multiple births and better growth indicator. Therefore, homozygous lambs for "B" allele should be selected and utilized in breeding program for better growth rate.

Extractives from Heartwoods: Part II. Isolation of Gmelinol and n-Octacosanol from Gmelina arborea

From the aqueous extract of the heartwood of Gmelina arborea (N.O.: Verbenaceae), a lignan has been isolated and identified as gmelinol on the basis of its chemical and spectral analysis. From the benzene extract of the same heartwood, n-octacosanol has been isolated as one of the constituents.

Mir143 expression inversely correlates with nuclear ERK5 immunoreactivity in clinical prostate cancer

Background:

Aberrant mitogen/extracellular signal-regulated kinase 5 (MEK5)–extracellular signal-regulated protein kinase 5 (ERK5)-mediated signalling has been implicated in a number of tumour types including prostate cancer (CaP). The mechanism for ERK5 activation in CaP remains to be fully elucidated. Studies have recently implicated the role of microRNA (miRNA) mir143 expression in the regulation of ERK5 expression.

Methods:

We utilised a tissue microarray (TMA) of 530 CaP cores from 168 individual patients and stained for both mir143 and ERK5. These TMAs were scored by a combination of observer and automated methods.

Results:

We observed a strong inverse relation between ERK5 and mir143, which manifested itself most strongly in the subgroup of 417 cores with non-zero mir143 and ERK5 immunoreactivity, or with only one of mir143 or ERK5 being zero (cc=0.2558 and P<0.0001). Mir143 neither correlate with Gleason scores or prostate-specific antigen levels, nor was it a predictor of disease-specific survival on univariate analysis.

Conclusion:

Although the mechanism for ERK5 activation in CaP remains to be fully elucidated, we have further validated the potential role of mir143 in regulating ERK5 levels in the clinical context. In addition, we demonstrate that the automated counting method for nuclear ERK5 is a clinically useful alterative to observer counting method in patient stratification in the context of ERK5 targeting therapy.

Ras mutation cooperates with β-catenin activation to drive bladder tumourigenesis

Mutations in the Ras family of proteins (predominantly in H-Ras) occur in approximately 40% of urothelial cell carcinoma (UCC). However, relatively little is known about subsequent mutations/pathway alterations that allow tumour progression. Indeed, expressing mutant H-Ras within the mouse bladder does not lead to tumour formation, unless this is expressed at high levels. The Wnt signalling pathway is deregulated in approximately 25% of UCC, so we examined if this correlated with the activation of MAPK signalling in human UCC and found a significant correlation. To test the functional significance of this association we examined the impact of combining Ras mutation (H-Ras(Q61L) or K-Ras(G12D)) with an activating β-catenin mutation within the mouse bladder using Cre-LoxP technology. Although alone, neither Ras mutation nor β-catenin activation led to UCC (within 12 months), mice carrying both mutations rapidly developed UCC. Mechanistically this was associated with reduced levels of p21 with dependence on the MAPK signalling pathway. Moreover, tumours from these mice were sensitive to MEK inhibition. Importantly, in human UCC there was a negative correlation between levels of p-ERK and p21 suggesting that p21 accumulation may block tumour progression following Ras mutation. Taken together these data definitively show Ras pathway activation strongly cooperates with Wnt signalling to drive UCC in vivo.

Injections for health-related reasons amongst injecting drug users in New Delhi and Imphal, India

OBJECTIVES

In many parts of the world where unsafe injection practices in health settings are common, the prevalence of blood-borne viruses (BBVs) is high amongst injecting drug users (IDUs). If IDUs in these settings are receiving injections for health-related reasons, the possibility of amplification of BBV transmission via medical injections exists. The aim of this study is to describe the nature and extent of injections received for health-related reasons amongst IDUs in two Indian cities, New Delhi and Imphal.

METHODS

A cross-sectional survey of 200 IDUs was conducted in late 2004. Trained peer outreach workers asked participants about health problems experienced, consultations with healthcare providers and health-related injections received in the preceding 4 weeks.

RESULTS

Most participants (99.5%) were male, the average age was 29 years, and the average time since first injection of illicit drugs was 6 years. A total of 133 injections were received for health-related reasons during the preceding 4 weeks by 15% of the participants. The average number of injections was 8.6/participant/year.

CONCLUSION

Injections for health-related reasons were commonplace amongst these IDUs. Therefore, amplification of BBV transmission within communities due to unsafe injections is possible and warrants further investigation.

Experimental studies on sodhana of aconite

Sodhana, a preliminary treatment is known to reduce toxicity, enhance therapeutic merits of drugs and even impart additional pharmacodynamic properties. The present study - Sodhana Aconite, conducted to establish the effect in toxicity chemical changes and comparative pharmacological activity, show definite reduction in the intense cardiotoxic effect in crude Aconite.

Urolithiasis in Manipur (north eastern region of India). Incidence and chemical composition of stones

The incidence of urolithiasis in Manipur is very high. From hospital records for a period of 7 years and 3 months, it was observed to be 11.6% of all general surgery cases in the General Hospital, Imphal. This is alarmingly high. The social, eating, drinking, and living habits are different among the three major populations in this state. The prevalence was minimal among Tribals. Compared to them the prevalence was about one and one half times higher among Muslims (also called Pangals) and seven times higher among Hindus. Surprisingly, the incidence of renal calcalus was higher in females. One hundred ninety-six stones were studied by wet chemical analysis. Calcium and oxalate were present in all stones. Phosphate was present in 194 stones and uric acid (including urate) was present in 146 stones.