Molar Pregnancy with Co-Existing Viable Fetus Delivered Preterm at 24 Weeks Gestation: A Case Report.

Introduction and Importance: It is unusual and challenging to have a molar pregnancy and a viable fetus at the same time. Bleeding per vagina, anemia, hyperemesis gravidarum, hypertension, thyrotoxicosis, and uterine enlargement disproportionate to uterine age are common clinical presentations that should alert the clinician to this uncommon illness. Pregnancy of a hydatidiform mole with a coexistent live fetus in most cases is a complete molar pregnancy. Partial molar pregnancy with fetus is rare and almost always ends in miscarriage due to triploid fetus. Case Presentation: In this case study, we present a 19-year-old woman who presented with acute vaginal bleeding and pelvic discomfort. Transabdominal ultrasound revealed fetal heart rate and identified the fetus at 24 weeks gestation. A large heterogeneous and complex cystic mass was found in the fundus, which was diagnosed as an abnormal placenta with a strong suspicion of molar pregnancy. The cervix was dilated by 4 cm at the time of hospital admission and four hours later, she gave birth to a healthy female fetus. The placenta emerged along with the membrane and abundant grape-like cystic tissue. Clinical Discussion: A case study showed a coexisting live fetus that was 24 weeks gestational age and had a partial hydatidiform mole, along with severe vaginal bleeding and uterine contraction. A partial mole was identified through histology analysis of the placenta. Conclusion: Maternal b-HCG levels fell to undetectable levels one month after birth without treatment. She was doing well and a follow-up six months later revealed no evidence of retained tissue or recurrence.

Four terpene synthases contribute to the generation of chemotypes in tea tree (Melaleuca alternifolia).

BACKGROUND: Terpene rich leaves are a characteristic of Myrtaceae. There is significant qualitative variation in the terpene profile of plants within a single species, which is observable as "chemotypes". Understanding the molecular basis of chemotypic variation will help explain how such variation is maintained in natural populations as well as allowing focussed breeding for those terpenes sought by industry. The leaves of the medicinal tea tree, Melaleuca alternifolia, are used to produce terpinen-4-ol rich tea tree oil, but there are six naturally occurring chemotypes; three cardinal chemotypes (dominated by terpinen-4-ol, terpinolene and 1,8-cineole, respectively) and three intermediates. It has been predicted that three distinct terpene synthases could be responsible for the maintenance of chemotypic variation in this species. RESULTS: We isolated and characterised the most abundant terpene synthases (TPSs) from the three cardinal chemotypes of M. alternifolia. Functional characterisation of these enzymes shows that they produce the dominant compounds in the foliar terpene profile of all six chemotypes. Using RNA-Seq, we investigated the expression of these and 24 additional putative terpene synthases in young leaves of all six chemotypes of M. alternifolia. CONCLUSIONS: Despite contributing to the variation patterns observed, variation in gene expression of the three TPS genes is not enough to explain all variation for the maintenance of chemotypes. Other candidate terpene synthases as well as other levels of regulation must also be involved. The results of this study provide novel insights into the complexity of terpene biosynthesis in natural populations of a non-model organism.

Valproic acid induced hyperammonaemic encephalopathy.

OBJECTIVE: To observe clinical and laboratory features of valproic acid-induced hyperammonaemic encephalopathy in patients taking valproic acid. METHODS: Observational study was conducted at the Neurology Department, Dow University of Health Sciences, Civil Hospital, Karachi, from February 26, 2010 to March 20, 2011. Ten patients on valproic acid therapy of any age group with idiopathic or secondary epilepsy, who presented with encephalopathic symptoms, were registered and followed up during the study. Serum ammonia level, serum valproic acid level, liver function test, cerebrospinal fluid examination, electroencephalogram and brain imaging of all the patients were done. Other causes of encephalopathy were excluded after clinical and appropriate laboratory investigations. Microsoft Excell 2007 was used for statistical analysis. RESULTS: Hyperammonaemia was found in all patients with encephalopathic symptoms. Rise in serum ammonia was independent of dose and serum level of valproic acid. Liver function was also found to be normal in 80% (n = 8) of the patients. Valproic acid was withdrawn in all patients. Three (30%) patients improved only after the withdrawal of valproic acid. Six (60%) patients improved after L-Carnitine replacement, one (10%) after sodium benzoate. On followup, serum ammonia had reduced to normal in five (50%) patients and to more than half of the baseline level in two (20%) patients. Three (30%) patients were lost to followup after complete clinical improvement. CONCLUSION: Within therapeutic dose and serum levels, valproic acid can cause symptomatic hyperammonaemia resulting in encephalopathy. All patients taking valproic acid presenting with encephalopathic symptoms must be monitored for the condition.

A biochemical interpretation of terpene chemotypes in Melaleuca alternifolia.

The variation of foliar monoterpenes in the Australian Tea Tree (Melaleuca alternifolia) has been of significant interest both to the essential oil industry as well as to ecologists. The majority of studies on leaf chemistry have been aimed directly towards obtaining oil of higher quality or quantity. In the current study, we aimed to understand how molecular mechanisms contribute to the chemical variability of this species, based on chemical analysis of the leaf oils from a biochemical perspective. Correlations between monoterpenes across the species as well as within chemotypes show strong, persistent patterns, which enable us to establish groups based on possible common biosynthetic origins. We found that three distinct enzymes corresponding to these groups: a sabinene-hydrate synthase, a 1,8-cineole synthase, and a terpinolene synthase may be sufficient to explain all six chemotypes in M. alternifolia.