Unilateral Lesion of Dopamine Neurons Induces Grooming Asymmetry in the Mouse

نویسندگان

  • Assunta Pelosi
  • Jean-Antoine Girault
  • Denis Hervé
  • Tim Douglas Aumann
چکیده

Grooming behaviour is the most common innate behaviour in animals. In rodents, it consists of sequences of movements organized in four phases, executed symmetrically on both sides of the animal and creating a syntactic chain of behavioural events. The grooming syntax can be altered by stress and novelty, as well as by several mutations and brain lesions. Grooming behaviour is known to be affected by alterations of the dopamine system, including dopamine receptor modulation, dopamine alteration in genetically modified animals, and after brain lesion. While a lot is known about the initiation and syntactic modifications of this refined sequence of movements, effects of unilateral lesion of dopamine neurons are unclear particularly regarding the symmetry of syntactic chains. In the present work we studied grooming in mice unilaterally lesioned in the medial forebrain bundle by 6-hydroxydopamine. We found a reduction in completion of grooming bouts, associated with reduction in number of transitions between grooming phases. The data also revealed the development of asymmetry in grooming behaviour, with reduced tendency to groom the contralateral side to the lesion. Symmetry was recovered following treatment with L-DOPA. Thus, the present work shows that unilateral lesion of dopamine neurons reduces self-grooming behaviour by affecting duration and numbers of events. It produces premature discontinuation of grooming chains but the sequence syntax remains correct. This deficient grooming could be considered as an intrinsic symptom of Parkinson's disease in animal models and could present some similarities with abnormalities of motor movement sequencing seen in patients. Our study also suggests grooming analysis as an additional method to screen parkinsonism in animal models.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Cinnamaldehyde attenuates dopaminergic neuronal loss in substantia nigra and induces midbrain catalase activity in a mouse model of Parkinson’s disease

Background and Objective: Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease that affects 3% of the population. PD involves a progressive degeneration of dopaminergic neurons in the substantia nigra pars compacta (SNc) and subsequent loss of dopamine. Dopamine depletion leads to movement dysfunction and is accompanied with tremor, rigid muscle...

متن کامل

Phytic Acid Mitigates Motor Asymmetry in Male Rat with Unilateral 6-Hydroxydopamine Striatal Lesion

Background and Objective: Parkinson's disease (PD) is a movement disorder with debilitating symptoms. Available treatments for PD mainly include its symptomatic relief with no prevention of its progression. Due to the iron-chelating and antioxidant effect of phytic acid (PA), this study was conducted to assess its protective effect in 6-hydroxydopamine-induced model of PD in rat. Materials and ...

متن کامل

The 6-OHDA mouse model of Parkinson's disease - Terminal striatal lesions provide a superior measure of neuronal loss and replacement than median forebrain bundle lesions.

Unilateral 6-hydroxydopamine (6-OHDA) lesions of the nigrostriatal pathway produce side-biased motor impairments that reflect the motor deficits seen in Parkinson's disease (PD). This toxin-induced model in the rat has been used widely, to evaluate possible therapeutic strategies, but has not been well established in mice. With the advancements in mouse stem cell research we believe the require...

متن کامل

Malva sylvestris aqueous extract could ameliorate 6-hydroxydopamine-induced motor asymmetry with no protective effect on dopaminergic nigrostriatal neurons in the rat

Background and Objective: Parkinson’s disease (PD) is a common neurological disorder due to degeneration of dopaminergic neurons within pars compacta of substantia nigra (SNC). With regard to protective effect of Malva sylvestris (MS), this study was conducted to evaluate the effect of aquaeous extract of this plant in an experimental model of PD induced by 6-hydroxydopamine (6-OHDA). Material...

متن کامل

Venom of a parasitoid wasp induces prolonged grooming in the cockroach

The parasitoid wasp Ampulex compressa hunts cockroaches Periplaneta americana, stinging them first in the thorax and then in the head, the sting penetrating towards the subesophageal ganglion. After being stung the cockroach grooms almost continuously for approximately 30 min, performing all the normal components of grooming behavior. This excessive grooming is only seen after the head sting an...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره 10  شماره 

صفحات  -

تاریخ انتشار 2015